Grease pumping device and pump head assembly

Abstract

The present application relates to grease pumping device and pump head assembly. The grease pumping device comprises a pump head, a support, an oil bag, an oil pressing spring, an oil bag pressing disc for supporting the lower end of the oil pressing spring, a spring winding and unwinding mechanism arranged on the support, comprising a rope, a locking structure and a winding-off piece, the rope being connected with the oil bag pressing disc, the winding-off piece being rotated in forward and reverse directions to wind off the rope, and the locking structure being used for locking the winding-off piece. The spring winding and unwinding mechanism can wind up the oil pressing spring, compress the oil pressing spring, and lock the winding-off piece through the locking structure, greatly facilitating the replacement operation of the oil bag. After the replacement of the oil bag is completed, the locking of the winding-off piece is released, the winding-off piece is reversely rotated to unwind the rope, and under the action of the oil pressing spring, the oil bag pressing disc is downwardly moved to make the oil pressing spring exert force on the oil pressing disc, thereby solving the technical problem of low oil bag replacement efficiency caused by the inconvenient manual pressing operation of the oil pressing spring during the replacement of the current grease pumping device.

Description

TECHNICAL FIELD

[0001] The present application relates to a lubricating grease pumping device and a pump head assembly. BACKGROUND

[0002] In a wind power generation system, a lubricating grease pumping device is needed to lubricate bearings, gears and other parts. For example, the oil suction configuration device of the wave-shaped lubricating grease tank disclosed in the Chinese patent CN204829233U includes a tank seat, i.e. a pump head, on which a wave-shaped lubricating grease tank, i.e. an oil bag, is detachably installed. A transparent protective cover is clamped on the pump head, and a conical spring is installed between the transparent protective cover and the oil bag. The transparent protective cover forms a bracket, and the conical spring can compress the oil bag and squeeze the lubricating grease in the oil bag. The conical spring is a pressure oil spring for loading the oil bag. When the pump head sucks oil, a vacuum is formed in the oil bag, and under the double action of the external pressure and the loading mechanism, the oil bag is compressed to squeeze the lubricating grease, which facilitates the entry of the lubricating grease with a larger viscosity into the pumping device.

[0003] In the prior art, the pressure oil spring can squeeze the lubricating grease, which facilitates the entry of the lubricating grease into the pump head. However, when replacing a new oil bag, the pressure oil spring needs to be compressed to create a larger space for the replacement operation of the oil bag. For some larger oil bags, the axial size of the pressure oil spring is larger, and the spring force of the pressure oil spring is larger. Therefore, the bracket is usually removed during installation, and the pressure oil spring is compressed by pressing the bracket. This operation is not convenient, and the replacement efficiency of the oil bag is low. SUMMARY

[0004] The present application aims to provide a lubricating grease pumping device to solve the technical problem of low oil bag replacement efficiency caused by the inconvenient manual compression of the pressure oil spring during the replacement of the oil bag in the current lubricating grease pumping device.

[0005] In addition, the present application also aims to provide a pump head assembly of the above-mentioned lubricating grease pumping device.

[0006] The pump head assembly of the present application adopts the following technical solution:

[0007] The pump head assembly comprises:

[0008] a pump head for detachable connection with the oil bag

[0009] a bracket fixed on the pump head for protecting the oil bag;

[0010] a pressure oil spring arranged on the bracket;

[0011] an oil bag pressure disc for supporting the lower end of the pressure oil spring and squeezing the oil bag;

[0012] The spring winding and unwinding mechanism is arranged on the support and comprises a rope connected with the oil bag pressing disc and a winding releasing part for winding releasing the rope.

[0013] The rope is wound by the winding releasing part in the forward rotation to drive the oil bag pressing disc to move away from the pump head, and the rope is released by the winding releasing part in the reverse rotation to drive the oil bag pressing disc to move close to the pump head under the elastic force of the oil pressing spring, so that the oil bag pressing disc reciprocates along the axial direction of the oil pressing spring to wind and unwind the oil pressing spring.

[0014] The spring winding and unwinding mechanism further comprises a locking structure for locking the winding releasing part or the rope or the oil bag pressing disc to prevent the oil pressing spring from being elongated after the oil bag pressing disc is in place.

[0015] The support of the pump head assembly is provided with the spring winding and unwinding mechanism, the oil pressing spring can be wound up by the spring winding and unwinding mechanism to be compressed, and the winding releasing part or the rope or the oil bag pressing disc is locked by the locking structure when the oil pressing spring is in the retracted state, which greatly facilitates the replacement operation of the oil bag.

[0016] The spring winding and unwinding mechanism is further optimized, and the spring winding and unwinding mechanism comprises a resistance increasing structure for applying resistance to the oil pressing spring to reduce the resultant force on the oil bag pressing disc when the locking structure releases the locking of the winding releasing part.

[0017] The resistance increasing structure is further optimized, and the resistance increasing structure is a one-way resistance increasing structure.

[0018] The form of the resistance increasing structure is further optimized, and the resistance increasing structure is an eddy current resistance increasing structure, a mechanical friction resistance increasing structure or a damping oil resistance increasing structure.

[0019] Further optimize the one-way resistance increasing structure, the spring winding and unwinding mechanism comprises a winding shaft, the resistance increasing structure comprises a rotating friction member and a cooperating friction member cooperating with the rotating friction member, the rotating friction member is assembled on the winding shaft through a one-way bearing so that the rotating friction member rotates with the winding shaft when the winding shaft reverses, the cooperating friction member is rotationally arranged on a support, the winding shaft is fixedly connected with a winding member, and the resistance increasing structure further comprises a pressure adjusting structure adjusting the pressure between the rotating friction member and the cooperating friction member; the pressure adjusting structure increases the pressure between the rotating friction member and the cooperating friction member to lock the winding member when the pressure oil spring is in the retracted state, reduces the pressure between the rotating friction member and the cooperating friction member to form resistance to the pressure oil spring when the pressure oil spring is released from the retracted state to the pressure oil state, and makes the pressure between the rotating friction member and the cooperating friction member zero when the pressure oil spring is in the pressure oil state.

[0020] Beneficial effects: the pressure adjusting structure can adjust the size of the friction, does not affect the pressure on the lubricating grease when the pressure oil spring is in the pressure oil state, can better adapt to the working conditions of the spring winding and unwinding mechanism at different stages, and the one-way bearing can reduce the number of pressure adjustment of the pressure adjusting structure. The rotating friction member and the cooperating friction member are in friction cooperation in the form of rotation, and the rope and the winding member are not worn.

[0021] Optimize the resistance increasing structure, the spring winding and unwinding mechanism comprises a winding shaft, the resistance increasing structure comprises a rotating friction member and a cooperating friction member cooperating with the rotating friction member, the rotating friction member is rotationally assembled on the winding shaft, the cooperating friction member is rotationally arranged on a support, the winding shaft is fixedly connected with a winding member, and the resistance increasing structure further comprises a pressure adjusting structure adjusting the pressure between the rotating friction member and the cooperating friction member; the pressure adjusting structure increases the pressure between the rotating friction member and the cooperating friction member to lock the winding member when the pressure oil spring is in the retracted state, reduces the pressure between the rotating friction member and the cooperating friction member to form resistance to the pressure oil spring when the pressure oil spring is released from the retracted state to the pressure oil state, and makes the pressure between the rotating friction member and the cooperating friction member zero when the pressure oil spring is in the pressure oil state and when the pressure oil spring is compressed from the pressure oil state to the retracted state.

[0022] Beneficial effects: the pressure adjusting structure can adjust the size of the friction, does not affect the pressure on the lubricating grease when the pressure oil spring is in the pressure oil state, can better adapt to the working conditions of the spring winding and unwinding mechanism at different stages. The rotating friction member and the cooperating friction member are in friction cooperation in the form of rotation, and the rope and the winding member are not worn.

[0023] The locking structure is further optimized, the locking structure is a resistance increasing structure, the locking structure locks the unwinding part to prevent the unwinding part from rotating reversely to lengthen the rope, the spring winding and unwinding mechanism comprises an unwinding rotating shaft, the resistance increasing structure comprises a rotating friction part and a cooperating friction part matched with the rotating friction part, the rotating friction part is fixedly arranged on the unwinding rotating shaft, the cooperating friction part is fixedly arranged on the support, the unwinding rotating shaft is fixedly connected with the unwinding part, and the resistance increasing structure further comprises a pressure adjusting structure for adjusting the pressure between the rotating friction part and the cooperating friction part; the pressure adjusting structure is used for increasing the pressure between the rotating friction part and the cooperating friction part to lock the unwinding part when the oil pressing spring is in the retracted state, decreasing the pressure between the rotating friction part and the cooperating friction part to form resistance to the oil pressing spring when the oil pressing spring is released from the retracted state to the oil pressing state, and making the pressure between the rotating friction part and the cooperating friction part be zero when the oil pressing spring is in the oil pressing state and when the oil pressing spring is compressed from the oil pressing state to the retracted state.

[0024] Beneficial effects: the unwinding part is locked by the one-way resistance increasing structure, the size of the friction force can be adjusted, the pressure on the lubricating grease is not affected when the oil pressing spring is in the oil pressing state, and the spring winding and unwinding mechanism can better adapt to different working conditions in different stages.

[0025] The pressure adjusting structure is further optimized, the pressure adjusting structure comprises an adjusting sleeve screwed on the support, the pressure between the rotating friction part and the cooperating friction part is adjusted by screwing the adjusting sleeve to press the rotating friction part, the adjusting sleeve and the rotating friction part are in rolling friction, or the pressure between the rotating friction part and the cooperating friction part is adjusted by screwing the adjusting sleeve to press the cooperating friction part. The pressure is adjusted by the adjusting sleeve, the adjusting sleeve is screwed on the support, and the adjustment is more convenient.

[0026] When the adjusting sleeve presses the cooperating friction part, there are balls between the adjusting sleeve and the rotating friction part, and the adjusting sleeve presses the rotating friction part through the balls. Rolling friction is adopted instead of sliding friction, so that the adjusting sleeve is prevented from rotating as much as possible.

[0027] In order to facilitate adjustment, there are elastic members between the adjusting sleeve and the rotating friction part or the cooperating friction part, the elastic members press the rotating friction part or the cooperating friction part, the stroke of adjustment is increased, and the adjustment operation is facilitated.

[0028] In order to further improve the stability of the oil pressing spring, the support comprises a guide part, the oil bag pressing disc and the guide part are in guiding and sliding fit in the axial direction of the oil pressing spring, or the oil pressing spring is connected with a spring seat, and the spring seat and the guide part are in guiding and sliding fit in the axial direction of the oil pressing spring. Under the guiding action of the guide part, the spring seat or the oil bag pressing disc is more stable during use.

[0029] Further optimization of the guide, which is a guide cylinder, the oil bladder pressure disc or spring seat is guided to slide along the cylinder wall of the guide cylinder. The guide cylinder has a good guiding effect on the oil bladder pressure disc or spring seat.

[0030] Another optimization of the locking structure is that the locking structure prevents the unwinding element from rotating reversely to unwind the rope by locking the unwinding element, and the locking structure comprises a ratchet wheel in transmission connection with the unwinding element, and a pawl movably arranged on the support to lock the ratchet wheel. The ratchet wheel and the pawl structure are simple and can realize one-way locking.

[0031] Further, in order to facilitate the loading and unloading of the oil bladder, the support has a side loading and unloading opening on the side perpendicular to the moving direction of the oil bladder pressure disc. The side loading and unloading opening is easy to install and operate.

[0032] In order not to affect the protection of the oil bladder, the support is provided with a limiting structure for limiting the oil bladder in the circumferential direction, and the limiting structure has an opening and closing opening which constitutes the side loading and unloading opening. The opening and closing opening can load and unload the oil bladder when it is opened, and can protect the oil bladder when it is closed. The protection level of the oil bladder is improved.

[0033] Further optimization of the limiting structure, the support comprises at least two fixed columns, the fixed columns are fixed on the pump head, the fixed columns extend along the moving direction of the oil bladder pressure disc, the limiting structure comprises a first movable element and a second movable element hinged on the fixed columns, the two movable elements are detachably connected to form the opening and closing opening at the connection of the first movable element and the second movable element, and the first movable element and the second movable element are opened to open the opening and closing opening for loading and unloading the oil bladder. By opening and closing the first movable element and the second movable element, the operation is facilitated, and the structure is relatively simple.

[0034] As another form of optimization of the oil bladder loading and unloading, the support comprises a frame body and an oil pressing spring mounting seat arranged on the frame body, one end of the oil pressing spring is mounted on the oil pressing spring mounting seat, and the frame body is provided with an end loading and unloading opening at the end in the axial direction of the oil pressing spring, the oil pressing spring mounting seat is arranged at the end loading and unloading opening, and the oil pressing spring mounting seat has an opening state of opening the end loading and unloading opening and a closing state of closing the end loading and unloading opening. The end loading and unloading opening can be applied to occasions where the space on the side of the oil bladder is small.

[0035] Further optimization of the end loading and unloading opening scheme of the support, the oil pressing spring mounting seat comprises two symmetrical hinged parts, the hinged parts are hinged with the frame body through a hinge shaft and can be detached, so that when the oil pressing spring mounting seat is hinged with the frame body by removing one hinged part and through the other hinged part, the oil pressing spring mounting seat can be flipped around the corresponding hinge shaft of the hinged part to open the end loading and unloading opening. The oil pressing spring mounting seat can open the end loading and unloading opening by flipping and detaching, and the opening mode can be selected according to the actual situation, and the operation is more flexible.

[0036] The pump head has been further optimized by incorporating a venting structure to expel air from the pump head during oil filling. This venting structure prevents air from being trapped within the grease and hindering normal oil pumping when the grease is being filled into the pump head cavity.

[0037] The exhaust structure is further optimized by including an exhaust pipe located at the top of the pump head's inner cavity, with multiple exhaust ports spaced apart along the pipe's length. An exhaust connector connecting the pump head's inner cavity and the outer side of the pump head is mounted on the pump head's housing, and the exhaust pipe communicates with the exhaust connector. Multiple exhaust ports facilitate the complete evacuation of air from the pump head's inner cavity, improving the exhaust efficiency.

[0038] The power source of the spring take-up and unwinding mechanism has been optimized. The mechanism includes an unwinding drive motor that drives the unwinding component to rotate. The unwinding drive motor is easy to operate and improves changeover efficiency.

[0039] Another optimized form of the unwinding mechanism is as follows: the spring winding / unwinding mechanism includes a crank handle that drives the unwinding component to rotate. A clutch structure is provided between the unwinding component and the crank handle to disconnect the power transmission path between the crank handle and the unwinding component. Alternatively, a one-way bearing is provided between the unwinding component and the crank handle to allow the crank handle to drive the unwinding component to rotate in the forward direction. The clutch structure or one-way bearing prevents the crank handle from rotating in the reverse direction with the unwinding component, thus avoiding accidental injury to the operator.

[0040] Further optimization of the spring retraction mechanism includes a crank handle that drives the unwinding component to rotate. The crank handle includes a connecting arm and an operating handle, which is hinged to the connecting arm to allow the operating handle to be folded up, reducing space occupation.

[0041] The pump head assembly has been further optimized, including a control device and a low-level detection module. The low-level detection module monitors the oil level in the oil bladder and sends a feedback signal to the control device when the oil level in the oil bladder reaches a set minimum level, thereby controlling the lubrication pump to stop. Low-level shutdown prevents the pump head from becoming cavitated.

[0042] Further optimization of the bracket: the bracket includes at least two fixed columns, which are fixed to the pump head and extend along the moving direction of the oil bladder pressure plate. The oil bladder pressure plate and the fixed columns are guided and slidably engaged in the moving direction of the oil bladder pressure plate.

[0043] Beneficial effects: The stability of the oil bladder pressure plate during movement is improved by the sliding cooperation between the oil bladder pressure plate and the fixed column guide.

[0044] The guide form of the fixed column and the oil bag pressing disc is further optimized, the outer periphery of the oil bag pressing disc is provided with a guide groove in sliding fit with each fixed column, and / or the oil bag pressing disc is provided with a guide hole through which the fixed column passes and in sliding fit with the fixed column.

[0045] Beneficial effects: the guide groove and / or the guide hole are in sliding fit with the fixed column, the oil bag pressing disc operates more stably, and the structure is relatively simple.

[0046] The pump head assembly is further optimized, the bracket is provided with a protection cylinder for protecting the oil bag, and the fixed column is located in the protection cylinder.

[0047] Beneficial effects: the safety of the oil bag can be improved through the protection cylinder, and the oil bag is not easily damaged.

[0048] When the protection cylinder is arranged, at least one pair of adjacent fixed columns are formed with a side loading opening for loading and unloading the oil bag, the protection cylinder comprises a cylinder body and a protection door, and the protection door is used for opening or closing the side loading opening.

[0049] Beneficial effects: the protection door facilitates the disassembly and assembly of the oil bag, and improves the efficiency of disassembling and assembling the oil bag.

[0050] The protection door is further optimized, the protection cylinder is injection molded, the protection door is provided with a thinning portion at the connection with the cylinder body, and the protection door is deformed to open or close the side loading opening through the thinning portion.

[0051] Beneficial effects: the protection cylinder injection molded has a simple structure and low cost.

[0052] Another optimization form of the protection door is that the protection door is hinged to the cylinder body. The protection door is hinged to the cylinder body, the connection is relatively stable, and the service life is high.

[0053] In order to improve the stability of the oil bag, the fixed column and / or the protection cylinder is provided with an oil bag guide surface for guiding the outer periphery of the oil bag in the axial direction and limiting the oil bag from tilting in the radial direction.

[0054] The protection cylinder is further optimized, the inner periphery of the protection cylinder forms the oil bag guide surface, the protection cylinder has an outwardly convex protection cylinder outwardly convex portion, a fixed column avoiding groove is formed on the inner side of the protection cylinder outwardly convex portion and faces the protection cylinder, and the fixed column is located in the fixed column avoiding groove. The oil bag is guided by the inner periphery of the protection cylinder, and the guiding effect is better.

[0055] When the protection cylinder is arranged, in order to further improve the protection effect on the oil bag, the bracket is provided with a cover away from the top cover of the pump head, and the cover is sealingly engaged with the protection cylinder in the moving direction of the oil bag pressing disc. The sealing engagement of the cover and the protection cylinder improves the protection level of the oil bag.

[0056] In order to further improve the guiding effect on the oil bag, a guiding rib is arranged on the inner side of the protective cylinder, and the guiding rib is used for guiding the oil bag and preventing the oil bag from being inclined.

[0057] The spring winding and unwinding mechanism is further optimized, a plurality of ropes are arranged, three ropes are arranged in a triangular shape, and the three ropes are used for synchronously acting on the oil bag pressing disc to maintain the posture of the oil bag pressing disc.

[0058] In order to facilitate the reversing of the rope, a reversing pulley is arranged on the support, and the rope is wound around the reversing pulley. Through the reversing pulley, the friction between the rope and the support can be reduced, and the acting force of pulling the rope can be reduced.

[0059] The spring winding and unwinding mechanism is further optimized, the spring winding and unwinding mechanism comprises a winding driving motor for driving the winding element to rotate, and the winding driving motor is used for locking the winding element to prevent the oil pressing spring from being elongated. Through the winding driving motor, the rope is locked, and the control is facilitated.

[0060] The winding motor is further optimized, the winding driving motor is a speed reduction motor, the winding driving motor comprises a speed reduction structure, and the winding element is locked through the resistance provided by the speed reduction structure after the winding driving motor is stopped; and the speed reduction structure constitutes the locking structure. Through the speed reduction structure, the locking structure is simple.

[0061] The winding driving motor is further optimized, the winding element is a winding drum, and the winding driving motor is arranged in the winding drum. The structure is more compact, and the occupied space is small.

[0062] The position of the winding element is further optimized, the support comprises an oil pressing spring mounting seat arranged at the top, the winding element is arranged on the side of the oil pressing spring mounting seat facing the pump head, and the winding element is located on the side of the oil pressing spring perpendicular to the moving direction of the oil bag pressing disc. The winding element is arranged side by side with the oil pressing spring, and the structure is more compact.

[0063] Further, in order to squeeze out the lubricating grease in the oil bag as much as possible, at least one of the pressing disc pressing surface for pressing the oil bag on the oil bag pressing disc and the pump head pressing surface for pressing the oil bag on the pump head is convex. Through the convex pressing surface, a part of the lubricating grease remaining in the oil bag can be squeezed out, and the utilization rate of the lubricating grease is improved.

[0064] The technical scheme of the lubricating grease pumping device provided by the application is as follows:

[0065] The lubricating grease pumping device comprises a pump head assembly and an oil bag,

[0066] The pump head assembly comprises:

[0067] a pump head, used for being detachably connected with the oil bag

[0068] A support is fixed on the pump head and used for protecting the oil bag.

[0069] An oil pressing spring is arranged on the support.

[0070] An oil bag pressing disc is used for supporting the lower end of the oil pressing spring and pressing the oil bag.

[0071] A spring winding and unwinding mechanism is arranged on the support and comprises a rope connected with the oil bag pressing disc and a winding and unwinding member used for winding and unwinding the rope.

[0072] The winding and unwinding member is wound around the rope through forward rotation, so that the rope drives the oil bag pressing disc to move away from the pump head; the rope is unwound through reverse rotation of the winding and unwinding member, so that the oil bag pressing disc moves towards the pump head under the elastic force of the oil pressing spring, thereby realizing the reciprocating movement of the oil bag pressing disc along the axial direction of the oil pressing spring to wind and unwind the oil pressing spring; the oil pressing spring has a retracted state leaving a space for replacing the oil bag and an oil pressing state used for pressing the oil bag.

[0073] The spring winding and unwinding mechanism further comprises a locking structure used for locking the winding and unwinding member or the rope or the oil bag pressing disc after the oil bag pressing disc is in place, so that the oil pressing spring cannot be elongated.

[0074] Beneficial effects: the support of the pump head assembly of the present application is provided with a spring winding and unwinding mechanism, the oil pressing spring can be wound up through the spring winding and unwinding mechanism, the oil pressing spring is compressed, and the winding and unwinding member or the rope or the oil bag pressing disc is locked through the locking structure when the oil pressing spring is in the retracted state, which greatly facilitates the replacement operation of the oil bag; after the replacement of the oil bag is completed, the winding and unwinding member can be unlocked and reversely rotated to unwind the rope, and the oil bag pressing disc moves downwards under the action of the oil pressing spring to enable the oil pressing spring to exert force on the oil pressing disc, thereby solving the technical problem of low replacement efficiency of the oil bag caused by the inconvenient manual pressing operation of the oil pressing spring in the current lubricating grease pumping device.

[0075] The spring winding and unwinding mechanism is further optimized, the spring winding and unwinding mechanism comprises a resistance increasing structure used for exerting resistance on the oil pressing spring to reduce the resultant force received by the oil bag pressing disc when the locking structure unlocks the winding and unwinding member. The resistance increasing structure can reduce the impact when the oil pressing spring is released, reduce the risk of injury and improve safety.

[0076] The resistance increasing structure is further optimized, and the resistance increasing structure is a one-way resistance increasing structure. The one-way resistance increasing structure can not affect the unwinding of the winding and unwinding member, reduce the driving force on the winding and unwinding member, and facilitate operation.

[0077] The form of the resistance increasing structure is further optimized, and the resistance increasing structure is an eddy current resistance increasing structure, a mechanical friction type resistance increasing structure or a damping oil resistance increasing structure.

[0078] Further optimize the one-way resistance increasing structure, the spring winding and unwinding mechanism comprises a winding shaft, the resistance increasing structure comprises a rotating friction member and a cooperating friction member cooperating with the rotating friction member, the rotating friction member is assembled on the winding shaft through a one-way bearing so that the rotating friction member rotates with the winding shaft when the winding shaft reverses, the cooperating friction member is rotationally arranged on a support, the winding shaft is fixedly connected with a winding member, and the resistance increasing structure further comprises a pressure adjusting structure adjusting the pressure between the rotating friction member and the cooperating friction member; the pressure adjusting structure can increase the pressure between the rotating friction member and the cooperating friction member to lock the winding member when the pressure oil spring is in the retracted state, can reduce the pressure between the rotating friction member and the cooperating friction member to form resistance to the pressure oil spring when the pressure oil spring is released from the retracted state to the pressure oil state, and can make the pressure between the rotating friction member and the cooperating friction member zero when the pressure oil spring is in the pressure oil state.

[0079] Beneficial effects: the pressure adjusting structure can adjust the friction force, does not affect the pressure on the lubricating grease when the pressure oil spring is in the pressure oil state, can better adapt to the working conditions of the spring winding and unwinding mechanism at different stages, and the one-way bearing can reduce the number of pressure adjustment of the pressure adjusting structure. The rotating friction member and the cooperating friction member are in friction cooperation in the form of rotation, and the rope and the winding member are not worn.

[0080] Optimize the resistance increasing structure, the spring winding and unwinding mechanism comprises a winding shaft, the resistance increasing structure comprises a rotating friction member and a cooperating friction member cooperating with the rotating friction member, the rotating friction member is rotationally assembled on the winding shaft, the cooperating friction member is rotationally arranged on a support, the winding shaft is fixedly connected with a winding member, and the resistance increasing structure further comprises a pressure adjusting structure adjusting the pressure between the rotating friction member and the cooperating friction member; the pressure adjusting structure can increase the pressure between the rotating friction member and the cooperating friction member to lock the winding member when the pressure oil spring is in the retracted state, can reduce the pressure between the rotating friction member and the cooperating friction member to form resistance to the pressure oil spring when the pressure oil spring is released from the retracted state to the pressure oil state, and can make the pressure between the rotating friction member and the cooperating friction member zero when the pressure oil spring is in the pressure oil state and when the pressure oil spring is compressed from the pressure oil state to the retracted state.

[0081] Beneficial effects: the pressure adjusting structure can adjust the friction force, does not affect the pressure on the lubricating grease when the pressure oil spring is in the pressure oil state, can better adapt to the working conditions of the spring winding and unwinding mechanism at different stages. The rotating friction member and the cooperating friction member are in friction cooperation in the form of rotation, and the rope and the winding member are not worn.

[0082] The locking structure is further optimized, the locking structure is a resistance increasing structure, the locking structure locks the unwinding part to prevent the unwinding part from rotating reversely to lengthen the rope, the spring winding and unwinding mechanism comprises an unwinding rotating shaft, the resistance increasing structure comprises a rotating friction part and a cooperating friction part matched with the rotating friction part, the rotating friction part is fixedly arranged on the unwinding rotating shaft, the cooperating friction part is fixedly arranged on the support, the unwinding rotating shaft is fixedly connected with the unwinding part, and the resistance increasing structure further comprises a pressure adjusting structure for adjusting the pressure between the rotating friction part and the cooperating friction part; the pressure adjusting structure can increase the pressure between the rotating friction part and the cooperating friction part to lock the unwinding part when the oil pressure spring is in the retracted state, can reduce the pressure between the rotating friction part and the cooperating friction part to form resistance to the oil pressure spring when the oil pressure spring is released from the retracted state to the oil pressure state, and can make the pressure between the rotating friction part and the cooperating friction part be zero when the oil pressure spring is in the oil pressure state and when the oil pressure spring is compressed from the oil pressure state to the retracted state.

[0083] Beneficial effects: the unwinding part is locked by the one-way resistance increasing structure, the size of the friction force can be adjusted, the pressure on the lubricating grease is not affected when the oil pressure spring is in the oil pressure state, and the spring winding and unwinding mechanism can better adapt to the working conditions in different stages.

[0084] The pressure adjusting structure is further optimized, the pressure adjusting structure comprises an adjusting sleeve screwed on the support, the pressure between the rotating friction part and the cooperating friction part is adjusted by screwing the adjusting sleeve to press the rotating friction part, the adjusting sleeve and the rotating friction part are in rolling friction, or the pressure between the rotating friction part and the cooperating friction part is adjusted by screwing the adjusting sleeve to press the cooperating friction part. The pressure is adjusted by the adjusting sleeve, the adjusting sleeve is screwed on the support, and the adjustment is more convenient.

[0085] When the adjusting sleeve presses the cooperating friction part, there are balls between the adjusting sleeve and the rotating friction part, and the adjusting sleeve presses the rotating friction part through the balls. Rolling friction is adopted instead of sliding friction, so that the adjusting sleeve does not rotate as much as possible.

[0086] In order to facilitate adjustment, there are elastic parts between the adjusting sleeve and the rotating friction part or the cooperating friction part, the elastic parts press the rotating friction part or the cooperating friction part, the stroke of adjustment is increased, and the adjustment operation is facilitated.

[0087] In order to further improve the stability of the oil pressure spring, the support comprises a guide part, the oil bag pressing disc and the guide part are in guiding and sliding fit in the axial direction of the oil pressure spring, or the oil pressure spring is connected with a spring seat, and the spring seat and the guide part are in guiding and sliding fit in the axial direction of the oil pressure spring. Under the guiding action of the guide part, the spring seat or the oil bag pressing disc is more stable during use.

[0088] Further optimization of the guide, which is a guide cylinder, the oil bag pressure disc or spring seat is guided to slide along the cylinder wall of the guide cylinder. The guide cylinder has a good guiding effect on the oil bag pressure disc or spring seat.

[0089] Another optimization of the locking structure is that the locking structure prevents the unwinding element from rotating reversely to unwind the rope by locking the unwinding element, and the locking structure comprises a ratchet wheel in transmission connection with the unwinding element, and a pawl movably arranged on the support to lock the ratchet wheel. The ratchet wheel and the pawl structure are simple and can realize one-way locking.

[0090] Further, in order to facilitate the loading and unloading of the oil bag, the support has a side loading and unloading opening on the side perpendicular to the moving direction of the oil bag pressure disc. The side loading and unloading opening is easy to install and operate.

[0091] In order not to affect the protection of the oil bag, the support is provided with a limiting structure for limiting the oil bag in the circumferential direction, and the limiting structure has an opening and closing opening which constitutes the side loading and unloading opening. The opening and closing opening can load and unload the oil bag when it is opened, and can protect the oil bag when it is closed. The protection level of the oil bag is improved.

[0092] Further optimization of the limiting structure, the support includes at least two fixed columns, the fixed columns are fixed on the pump head, the fixed columns extend along the moving direction of the oil bag pressure disc, the limiting structure includes a first movable element and a second movable element hinged on the fixed columns, the two movable elements are detachably connected to form the opening and closing opening at the connection of the first movable element and the second movable element, and the first movable element and the second movable element are opened to open the opening and closing opening for loading and unloading the oil bag. Through the opening and closing of the first movable element and the second movable element, the operation is facilitated, and the structure is relatively simple.

[0093] As another form of optimization for loading and unloading the oil bag, the support includes a frame body and an oil pressing spring mounting seat arranged on the frame body, one end of the oil pressing spring is mounted on the oil pressing spring mounting seat, and the frame body is provided with an end loading and unloading opening at the end in the axial direction of the oil pressing spring, the oil pressing spring mounting seat is arranged at the end loading and unloading opening, and the oil pressing spring mounting seat has an open state for opening the end loading and unloading opening and a closed state for closing the end loading and unloading opening. The end loading and unloading opening can be applied to occasions where the space on the side of the oil bag is small.

[0094] Further optimization of the end loading and unloading opening scheme of the support, the oil pressing spring mounting seat includes two symmetrical hinged parts, the hinged parts are hinged to the frame body through a hinge shaft and can be detached, so that when the oil pressing spring mounting seat is hinged to the frame body by removing one hinged part and the other hinged part, the oil pressing spring mounting seat can be flipped around the hinge shaft corresponding to the hinged part to open the end loading and unloading opening. The oil pressing spring mounting seat can open the end loading and unloading opening by flipping and detaching, and the opening mode can be selected according to the actual situation, and the operation is more flexible.

[0095] The pump head is further optimized, and an air exhaust structure is arranged in the pump head to exhaust air in the pump head when oil is injected into the pump head. By arranging the air exhaust structure, the problem that air in the pump head cannot be exhausted and is trapped in the lubricating grease to affect normal oil pumping of the pump head when the lubricating grease is filled into the pump head cavity can be avoided.

[0096] The air exhaust structure is further optimized, and the air exhaust structure includes an air exhaust pipe arranged at the top of the pump head cavity, a plurality of air exhaust ports are arranged on the air exhaust pipe in the length direction of the air exhaust pipe, an air exhaust connector is arranged on the shell of the pump head to communicate the pump head cavity and the outside of the pump head, and the air exhaust pipe is in communication with the air exhaust connector. The plurality of air exhaust ports can more easily exhaust the air in the pump head cavity, thereby improving the air exhaust effect.

[0097] The power mode of the spring winding and unwinding mechanism is optimized, and the spring winding and unwinding mechanism includes a winding drive motor that drives the winding member to rotate. The winding drive motor is convenient to operate and improves the replacement efficiency.

[0098] Another optimization form of the winding member drive is that the spring winding and unwinding mechanism includes a crank handle that drives the winding member to rotate, and a clutch structure is arranged between the winding member and the crank handle to disconnect the power transmission path between the crank handle and the winding member, or a one-way bearing is arranged between the winding member and the crank handle to enable the crank handle to drive the winding member to rotate in the forward direction. The clutch structure or the one-way bearing can prevent the crank handle from rotating in the reverse direction with the winding member, thereby avoiding injury to the operator.

[0099] The spring winding and unwinding mechanism is further optimized, and the spring winding and unwinding mechanism includes a crank handle that drives the winding member to rotate, and the crank handle includes a connecting arm and an operation handle that is hinged to the connecting arm to enable the operation handle to be folded and stored. The occupied space is reduced.

[0100] The pump head assembly is further optimized, and the pump head assembly further includes a control device and a low liquid level detection module. The low liquid level detection module is used to monitor the liquid level of the oil bag and feed a signal to the control device when the liquid level in the oil bag is at a set minimum liquid level to control the lubricating pump to stop. The low liquid level stop avoids the pump head being emptied.

[0101] The support is further optimized, and the support includes at least two fixed columns that are fixed to the pump head and extend in the movement direction of the oil bag pressing plate. The oil bag pressing plate is in guided sliding fit with the fixed columns in the movement direction of the oil bag pressing plate.

[0102] Beneficial effects: The guided sliding fit of the oil bag pressing plate with the fixed columns improves the stability of the oil bag pressing plate during movement.

[0103] The guide form of the fixed column and the oil bag pressing disc is further optimized, the outer periphery of the oil bag pressing disc is provided with a guide groove in sliding fit with each fixed column, and / or the oil bag pressing disc is provided with a guide hole through which the fixed column passes and in sliding fit with the fixed column.

[0104] Beneficial effects: the guide groove and / or the guide hole are in sliding fit with the fixed column, the oil bag pressing disc operates more stably, and the structure is relatively simple.

[0105] The pump head assembly is further optimized, the bracket is provided with a protection cylinder for protecting the oil bag, and the fixed column is located in the protection cylinder.

[0106] Beneficial effects: the safety of the oil bag can be improved by the protection cylinder, and the oil bag is not easily damaged.

[0107] When the protection cylinder is arranged, in order to facilitate the loading and unloading of the oil bag, at least one pair of adjacent fixed columns are formed with a side loading and unloading opening for loading and unloading the oil bag, the protection cylinder comprises a cylinder body and a protection door, and the protection door is used for opening or closing the side loading and unloading opening.

[0108] Beneficial effects: the protection door facilitates the disassembly and assembly of the oil bag, and improves the efficiency of disassembly and assembly of the oil bag.

[0109] The protection door is further optimized, the protection cylinder is injection molded, the protection door is provided with a thinning portion at the connection with the cylinder body, and the protection door is deformed to open or close the side loading and unloading opening through the thinning portion.

[0110] Beneficial effects: the protection cylinder injection molded has a simple structure and low cost.

[0111] Another optimization form of the protection door is that the protection door is hinged to the cylinder body. The protection door is hinged to the cylinder body, the connection is relatively stable, and the service life is high.

[0112] In order to improve the stability of the oil bag, the fixed column and / or the protection cylinder is provided with an oil bag guide surface for guiding the outer periphery of the oil bag in the axial direction and limiting the oil bag from tilting in the radial direction.

[0113] The protection cylinder is further optimized, the inner periphery of the protection cylinder forms the oil bag guide surface, the protection cylinder has an outwardly convex protection cylinder outwardly convex portion, a fixed column avoiding groove is formed on the inner side of the protection cylinder outwardly convex portion and faces the protection cylinder, and the fixed column is located in the fixed column avoiding groove. The oil bag is guided by the inner periphery of the protection cylinder, and the guiding effect is better.

[0114] When the protection cylinder is arranged, in order to further improve the protection effect on the oil bag, the bracket is provided with a cover away from the top cover of the pump head, and the cover is sealingly engaged with the protection cylinder in the moving direction of the oil bag pressing disc. The sealing engagement of the cover and the protection cylinder improves the protection level of the oil bag.

[0115] In order to further improve the guiding effect on the oil bag, a guiding rib is arranged on the inner side of the protective cylinder, which is used for guiding the oil bag and preventing the oil bag from being skewed.

[0116] The spring winding and unwinding mechanism is further optimized. A plurality of ropes are arranged, and three ropes are arranged in a triangular shape, which are used for synchronously acting on the oil bag pressing disc to maintain the posture of the oil bag pressing disc. The posture control of the oil bag pressing disc is more convenient.

[0117] In order to facilitate the reversing of the rope, a reversing pulley is arranged on the support, and the rope is wound around the reversing pulley. Through the reversing pulley, the friction between the rope and the support can be reduced, and the acting force of pulling the rope can also be reduced.

[0118] The spring winding and unwinding mechanism is further optimized. The spring winding and unwinding mechanism comprises an unwinding driving motor for driving the unwinding part to rotate. The unwinding part is locked by the unwinding driving motor, so that the oil pressing spring cannot be elongated. The rope is locked by the unwinding driving motor, which is convenient for control.

[0119] The unwinding driving motor is further optimized. The unwinding driving motor is a speed reduction motor. The unwinding driving motor comprises a speed reduction structure. After the unwinding driving motor is stopped, the unwinding part is locked by the resistance provided by the speed reduction structure. The speed reduction structure constitutes the locking structure. The locking structure is simple through the speed reduction structure.

[0120] The unwinding driving motor is further optimized. The unwinding part is a winding drum. The unwinding driving motor is arranged in the winding drum. The structure is more compact, and the occupied space is small.

[0121] The position of the unwinding part is further optimized. The support comprises an oil pressing spring mounting seat arranged on the top. The unwinding part is arranged on the side of the oil pressing spring mounting seat facing the pump head, and the unwinding part is on the side of the oil pressing spring perpendicular to the moving direction of the oil bag pressing disc. The unwinding part is arranged side by side with the oil pressing spring, and the structure is more compact.

[0122] Further, in order to squeeze out the lubricating grease in the oil bag as much as possible, at least one of the pressing disc extrusion surface on the oil bag pressing disc and the pump head extrusion surface on the pump head is convex. Through the extrusion surface of the convex, a part of the lubricating grease remaining in the oil bag can be squeezed out, and the utilization rate of the lubricating grease is improved.

[0123] An oil bag recess is arranged in the middle of the end of the oil bag, which is recessed to the inside of the oil bag. The oil bag recess is matched with the pressing disc extrusion surface or the pump head extrusion surface arranged with the convex. The oil bag recess can reduce the remaining amount of lubricating grease in the oil bag under the condition that the deformation of the oil bag is small, and the waste of lubricating grease is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0124] Figure 1is the structural schematic diagram (part of structure is not shown) of the grease pumping device in embodiment 1 of the present application;

[0125] Figure 2 is the partial structural schematic diagram of the oil bag and the support in embodiment 1 of the present application;

[0126] Figure 3 is the sectional view of the oil bag, the oil bag pressing plate and the oil bag bearing plate in embodiment 1 of the present application;

[0127] Figure 4 is the partial structural schematic diagram of the spring winding and releasing mechanism in embodiment 1 of the present application;

[0128] Figure 5 is the structural schematic diagram of the resistance increasing structure in embodiment 1 of the present application;

[0129] Figure 6 is the structural schematic diagram of the inside of the pump head in embodiment 1 of the present application;

[0130] Figure 7 is the structural schematic diagram of the limiting structure in embodiment 1 of the present application;

[0131] Figure 8 is the partial structural schematic diagram of the spring winding and releasing mechanism in embodiment 2 of the present application;

[0132] Figure 9 is Figure 8 the local enlarged view of part A;

[0133] Figure 10 is Figure 8 the cooperation schematic diagram of the hinge shaft and the baffle;

[0134] Figure 11 is the partial structural schematic diagram of the spring winding and releasing mechanism in embodiment 3 of the present application;

[0135] Figure 12 is the structural schematic diagram of the clutch structure in embodiment 4 of the present application;

[0136] Figure 13 is the state schematic diagram of the clutch structure disconnecting the power of the winding shaft and the winding shaft in embodiment 4 of the present application;

[0137] Figure 14 is the structural schematic diagram of the resistance increasing structure in embodiment 5 of the present application;

[0138] Figure 15is the schematic diagram of the compressed state of the oil bag in the specific embodiment 6 of the grease pumping device of the present application;

[0139] Figure 16 is the schematic diagram of the structure in the specific embodiment 16 of the grease pumping device of the present application;

[0140] Figure 17 is the schematic diagram of the structure in another perspective in the specific embodiment 16 of the grease pumping device of the present application;

[0141] Figure 18 is the schematic diagram of the structure of the part hidden by the cover and the protection cylinder in the specific embodiment 16 of the grease pumping device of the present application;

[0142] Figure 19 is the schematic diagram of the structure of the oil pressing spring mounting seat in the specific embodiment 16 of the grease pumping device of the present application;

[0143] Figure 20 is the sectional view of the unwinding cylinder and the unwinding motor in the specific embodiment 16 of the grease pumping device of the present application;

[0144] Figure 21 is the schematic diagram of the structure of the oil bag pressing disc in the specific embodiment 16 of the grease pumping device of the present application;

[0145] Figure 22 is the schematic diagram of the cooperation structure of the oil bag, the protection cylinder and the fixed column in the specific embodiment 27 of the grease pumping device of the present application;

[0146] Figures 1 to 7 In the middle: 1-pump head; 11-pump head top plate; 12-oil bag bearing plate; 121-upper boss; 2-bracket; 21-frame body; 211-fixed column; 22-oil pressing spring mounting seat; 221-bracket; 222-resistance increasing fixing frame; 23-first movable part; 24-second movable part; 25-fixed plate; 3-oil bag; 31-oil bag oil outlet; 32-oil bag connector; 4-oil pressing spring; 41-conical spring; 42-spring seat; 51-rope; 52-unwinding cylinder; 53-oil bag pressing disc; 531-lower boss; 54-crank handle; 541-connection crank arm; 542-operation handle; 55-unwinding rotating shaft; 551-ratchet wheel; 552-pawl; 553-ratchet teeth; 6-exhaust pipe; 61-exhaust port; 71-friction plate; 72-friction block; 73-adjusting sleeve; 74-rolling ball; 75-rotation stopping key; 8-exhaust connector;

[0147] Figures 8 to 10 In the middle: 201-bracket; 202-oil pressing spring mounting seat; 203-hinge lug; 204-fixed column; 205-hinge seat; 207-stand; 208-hinge shaft; 209-hinge shaft spring; 210-spring cooperation boss; 2101-baffle; 2102-baffle cap;

[0148] Figure 11 In the figure: 301 - eddy current resistance increasing structure; 302 - oil pressure spring mounting seat; 303 - driving motor;

[0149] Figure 12 and Figure 13 In the figure: 401 - connecting section; 402 - unwinding rotating shaft; 403 - handle rotating shaft;

[0150] Figure 14 In the figure: 501 - friction block; 502 - one-way bearing; 503 - unwinding rotating shaft; 504 - friction block;

[0151] Figure 15 In the figure: 601 - oil bag; 602 - wrinkle area; 603 - middle area; 604 - pump head; 605 - oil bag pressure disc; 606 - oil bag bearing plate; 607 - thorn; 609 - pressure disc extrusion surface; 610 - pump head extrusion surface;

[0152] Figures 16 to 21 In the figure: 161 - support; 162 - fixed column; 163 - pump head; 164 - oil pressure spring mounting seat; 165 - oil bag pressure disc; 166 - oil bag; 167 - protection cylinder; 168 - cylinder body; 169 - protection door; 1610 - buckle; 1611 - hinged lug; 1612 - guide groove; 1613 - annular protrusion; 1614 - cover; 1615 - rope; 1616 - lightening hole; 1617 - oil pressure spring; 1618 - unwinding cylinder; 1619 - unwinding motor; 1620 - helical winding groove; 1621 - motor mounting seat; 1622 - winding cylinder mounting seat; 1623 - motor shell; 1624 - motor output shaft; 1625 - reversing pulley;

[0153] Figure 22 In the figure: 221 - protection cylinder inner circumferential surface; 222 - protection cylinder; 223 - protection cylinder outer convex portion; 224 - fixed column avoiding groove; 225 - fixed column; 226 - oil bag; 227 - thinning portion; 228 - protection door; 229 - cylinder body. DETAILED DESCRIPTION

[0154] In order to make the purpose, technical solutions and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application, and are not used to limit the present application, that is, the described examples are only a part of the examples of the present application, but not all the examples. The components of the embodiments of the present application generally described and shown in the drawings herein can be arranged and designed in various different configurations.

[0155] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0156] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0157] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0158] Specific embodiment 1 of the grease pumping device of the present invention:

[0159] like Figures 1 to 3 As shown, the grease pumping device includes a pump head assembly and an oil bladder. The pump head assembly includes a pump head 1 and a bracket 2 fixed on the pump head 1. An oil bladder 3 is detachably fixed on the pump head 1. The bottom of the oil bladder 3 has a constricted structure with an oil outlet 31.

[0160] In this embodiment, the grease pumping device is described in the vertical state of the oil bladder. The directional terms such as up, down, left, and right are used only for ease of description. In actual installation, the grease pumping device is preferably installed with the oil bladder vertically. Of course, it can also be installed horizontally or at an angle depending on the actual needs.

[0161] The bracket 2 includes a frame 21 and a pressure spring mounting seat 22 mounted on the frame 21. A pressure spring 4 is mounted on the pressure spring mounting seat 22. The pressure spring 4 applies pressure to the oil bladder 3, forcing the grease inside the housing 31 towards the oil outlet 31 of the oil bladder. In this embodiment, the pressure spring 4 includes two conical springs 41 arranged vertically. The larger end of the upper conical spring 41 is on top of the smaller end, and the smaller end of the lower conical spring 41 is on the bottom of the larger end. A spring seat 42 is provided between the two conical springs.

[0162] When the lubricating grease in the oil bag 3 is used up, the oil bag 3 needs to be disassembled, in order to facilitate the quick disassembly of the oil bag 3, a spring winding and unwinding mechanism for winding up the oil pressing spring 4 when the oil bag 3 is replaced is arranged in the embodiment, the spring winding and unwinding mechanism is arranged on the oil pressing spring mounting seat 22, and is used for winding up the oil pressing spring 4 and keeping the oil pressing spring 4 in a compressed state.

[0163] As shown in Figure 3 and Figure 4 , the spring winding and unwinding mechanism comprises a rope 51 and a winding drum 52 for unwinding the rope 51, one end of the rope 51 is fixed on the winding drum 52, and the other end is connected with an oil bag pressing disc 53, the oil bag pressing disc 53 is used for supporting the lower end of the oil pressing spring 4 and pressing the lubricating grease in the oil bag 3 to the oil outlet 31 of the oil bag. In the embodiment, a pull ring is arranged at the center of the oil bag pressing disc 53, and the rope 51 is connected to the pull ring. The upper end of the oil pressing spring 4 is abutted on the oil pressing spring mounting seat 22, and the lower end is abutted on the oil bag pressing disc 53. The rope 51 is wound on the winding drum 52 after passing through the oil pressing spring mounting seat 22 and the spring seat 42, and the winding drum 52 can drive the oil bag pressing disc 53 to move up and down through the rope 51. When the winding drum 52 is rotated forward, the rope 51 is wound on the winding drum 52, the lower end of the oil pressing spring 4 moves upward, the oil pressing spring 4 is compressed, and when the winding drum 52 is rotated reversely, the lower end of the oil pressing spring 4 moves downward under the action of the elastic force of the oil pressing spring 4, and the compression amount of the oil pressing spring 4 is reduced. In the embodiment, the rope is a wire rope. The rope is not limited to the wire rope, and can also be a chain. The links of the chain are independent, and will not drive the wound part on the winding member to relax in the relaxed state. However, the wire rope has a certain rigidity, and the wound part on the winding member will be loosened in disorder when it is relaxed.

[0164] The spring winding and unwinding mechanism further comprises a winding shaft 55 rotatably arranged on the oil pressing spring mounting seat 22 and a crank 54 for driving the winding shaft 55 to rotate, and the winding drum 52 is fixed on the winding shaft 55. The crank 54 comprises a connecting arm 541 and an operating handle 542, and the operating handle 542 is hinged to the connecting arm 541 so that the operating handle can be folded and wound up (all the operating handles shown in the figure are in the folded and wound-up state). In other embodiments, the operating handle of the crank can be fixedly connected with the arm.

[0165] The oil pressing spring has a retracted state separated from the oil bag to leave space for replacing the oil bag, and a pressing state for pressing the oil bag. The support 221 is fixed on the oil pressing spring mounting seat 22, and the unwinding shaft 55 is rotatably arranged on the support 221. In order to keep the oil pressing spring 4 in a compressed state, the unwinding shaft 55 is fixed with a ratchet wheel 551, and the support 221 is hinged with a pawl 552, the pawl 552 is matched with the ratchet teeth 553 on the ratchet wheel 551, and when the unwinding shaft is reversely rotated, the pawl 552 can be matched with the ratchet teeth 553 to limit the rotation of the unwinding shaft 55. In the embodiment, the unwinding shaft is driven to rotate forward by the crank 54, until the lower end of the oil pressing spring 4 is pulled up, the lower end of the oil pressing spring 4 is separated from the oil bag 3, and enough space is left for replacing the oil bag, the compression of the oil pressing spring 4 is completed, the lower end of the oil pressing spring 4 is above the oil bag 3, the oil pressing spring is in the retracted state, the oil bag pressing disc is lifted into position, the unwinding drum 52 is stopped, the pawl 552 locks the ratchet teeth 553, and the unwinding drum 52 cannot be reversely rotated. At this time, the replacement operation of the oil bag 3 can be carried out, after the replacement of the oil bag 3 is completed, the lower end of the oil pressing spring 4 is lowered, the locking of the pawl 552 to the ratchet teeth 553 is released, the unwinding drum 52 is reversely rotated under the elastic force of the oil pressing spring 4, the lower end of the oil pressing spring 4 moves downward, until the oil pressing spring applies pressure to the oil bag, at this time, the oil pressing spring is in the pressing state. The ratchet wheel 551 and the pawl 552 in the embodiment constitute a locking structure for locking the unwinding member after the oil bag pressing disc is in position. The ratchet wheel and the pawl do not affect the forward rotation of the unwinding drum, and when the unwinding drum needs to be reversely rotated, the locking of the pawl to the ratchet wheel needs to be released.

[0166] Since the elastic force of the oil pressing spring 4 is large when the compression amount is large, the elastic force is released when the locking of the pawl 552 to the ratchet teeth 553 is released, the driving force of the unwinding shaft 55 is large when reversely rotated, and the operator is easily injured. In order to reduce the probability of this situation, the spring winding and unwinding mechanism further includes a resistance increasing structure. The resistance increasing structure in the embodiment is a mechanical friction type resistance increasing structure, and the resistance increasing structure includes a friction plate 71 and a friction block 72 matched with the friction plate 71. The friction plate 71 and the friction block 72 are arranged in the axial direction of the unwinding shaft 55. Figure 4 and Figure 5 As shown in the figures, the resistance increasing fixed frame 222 is arranged on the oil pressing spring mounting seat 22, the unwinding shaft 55 passes through the resistance increasing fixed frame 222, the friction plate 71 is fixed on the resistance increasing fixed frame 222, and the friction block 72 is rotatably arranged on the unwinding shaft 55 through the rotation stopping key 75 arranged on the unwinding shaft. When the unwinding shaft 55 rotates, the friction block 72 rotates with the unwinding shaft 55, the friction force between the friction plate 71 and the friction block 72 forms resistance to the oil pressing spring 4, and the rebound speed of the oil pressing spring 4 is reduced.

[0167] If the friction between the friction plate 71 and the friction block 72 continuously applies resistance to the oil pressing spring 4, it will inevitably reduce the force of the oil pressing spring 4 on the oil bag pressing disc 53, affecting the oil pressing effect. In order to reduce the influence on the oil pressing, in this embodiment, the friction between the friction plate 71 and the friction block 72 is adjustable, the adjusting sleeve 73 is screwed on the increase resistance fixed frame 222, the unwinding shaft 55 passes through the adjusting sleeve 73, and the friction block 72 can slide relative to the unwinding shaft in the axial direction of the unwinding shaft. The axial end of the adjusting sleeve 73 presses against the friction block 72, and the adjusting sleeve 73 can change the pressure between the friction plate 71 and the friction block 72 by pressing the friction block 72, thereby adjusting the friction between the friction plate and the friction block. In this embodiment, the friction block constitutes a rotating friction member, and the friction plate constitutes a cooperating friction member cooperating with the rotating friction member. In other embodiments, the rotating friction member can also be a friction block, and the cooperating friction member is a friction plate.

[0168] The adjusting sleeve 73 and the friction block 72 are provided with a ball 74, and the adjusting sleeve 73 presses the friction block 72 through the ball 74. In other embodiments, the adjusting sleeve can also directly press against the friction block.

[0169] In this embodiment, when the oil pressing spring 4 is in the retracted state, the pressure between the friction block 72 and the friction plate 71 is increased, so that the friction therebetween is greater than the force of the oil pressing spring 4 on the friction block 72, at this time the unwinding shaft 55 cannot be reversely rotated to lock the unwinding drum, further improving the stability and safety of the spring winding and unwinding mechanism. When the oil pressing spring is released, the pressure between the friction block 72 and the friction plate 71 is reduced to form resistance to the oil pressing spring, and when the oil pressing spring is pressing oil and the oil pressing spring is released, the pressure between the friction block 72 and the friction plate 71 is zero. In this embodiment, the oil pressing spring is retracted, which means that the oil pressing spring is compressed, and the oil pressing spring is released, which means that the oil pressing spring is released and stretched. Of course, in other embodiments, the unwinding drum can also be locked by the increase resistance structure, at this time the ratchet and pawl are not provided, at this time the increase resistance structure constitutes the locking structure of the locking unwinding drum.

[0170] In this embodiment, the unwinding drum constitutes the unwinding member, and in other embodiments, the unwinding shaft can be integrally provided with the unwinding drum, and the ratchet and pawl connected with the shaft can also be connected on the unwinding drum.

[0171] The adjusting sleeve in this embodiment constitutes a pressure adjusting structure for adjusting the pressure between the rotating friction member and the cooperating friction member. In other embodiments, in addition to the adjusting sleeve, a top rod can also be provided to press the rotating cooperating member, and the cooperating friction member can also be adjusted in the axial position of the unwinding shaft, and the rotating friction member is fixed on the increase resistance shaft.

[0172] In other embodiments, the friction surface of the rotating friction member can be an outer circumferential surface, and the cooperating friction member is in the form of a clamp. The friction between the rotating friction member and the cooperating friction member is adjusted by adjusting the force with which the cooperating friction member clamps the rotating friction member. In this case, the cooperating friction member and the rotating friction member are similar to a brake drum. In this case, the adjusting structure is an adjusting screw that adjusts the clamping force of the cooperating friction member. In other embodiments, the friction of the resistance increasing structure can not be adjusted. In this case, the resistance increasing structure can be a one-way resistance increasing structure. When the locking structure is unlocked, the unwinding member rotates in the opposite direction and exerts a resistance on the oil spring to reduce the resultant force on the oil pocket pressing disc. In order not to affect the normal oil pressing operation, the unwinding shaft is divided into two sections, and a clutch is arranged between the two sections. The resistance increasing structure and the unwinding drum are arranged on the two sections, respectively. When it is necessary to increase the resistance on the oil spring, the two sections are combined through the clutch.

[0173] In the embodiment, the frame 21 includes two fixed columns 211, which are fixed to the pump head 1. The oil spring mounting seat 22 is fixed to the top of the two fixed columns 211. The two fixed columns 211 are provided with a limiting structure for limiting the oil bag 3, as shown in Figure 7 In the embodiment, the limiting structure includes two movable members, i.e., a first movable member 23 and a second movable member 24. Both of the two movable members are long strip-shaped arc plates, and are hingedly connected to form a semicircular plate. The connection between the two movable members is detachable and forms an opening and closing opening. When the opening and closing opening is opened, the oil bag 3 can be installed or removed through the opening and closing opening. When the opening and closing opening is closed, the two movable members can protect the oil bag 3. In the embodiment, the two movable members are arranged between the two fixed columns 211. The limiting structure further includes an arc-shaped fixed plate 25. The two movable members and the fixed plate 25 form a circular structure, which protects the oil bag 3 and prevents the oil bag 3 from moving in the radial direction. The opening and closing opening constitutes a side loading and unloading opening on the side surface of the support 2 for loading and unloading the oil bag 3. Since the two fixed columns are symmetrically arranged, the direction of the side loading and unloading opening can be selected during installation of the fixed columns according to the environment on site. In other embodiments, when multiple fixed columns are arranged, there can be multiple side loading and unloading openings.

[0174] As shown in Figure 6As shown, the pump head 1 in the embodiment is provided with an exhaust pipe 6, and the housing of the pump head 1 is provided with an exhaust joint 8 communicating the inner cavity of the pump head 1 with the outside of the pump head 1, and the exhaust pipe 6 communicates with the exhaust joint 8. The exhaust pipe 6 is annular, and a plurality of exhaust ports 61 are provided on the exhaust pipe 6 and are arranged at intervals in the extension direction of the exhaust pipe 6. The exhaust pipe 6 is horizontally arranged, and the center of the circle surrounded by the exhaust pipe 6 coincides with the center of the pump head. The exhaust ports 61 are of four types, specifically, upward, downward, inward and outward, so that the air in the oil chamber can be discharged as much as possible, facilitating the discharge of air in the oil chamber. The provision of the exhaust pipe 6 can discharge air during the first oil injection, and can avoid the problem that air in the grease cannot be discharged and is trapped in the grease when the grease is filled into the inner cavity of the pump head 1, thereby affecting the normal oil injection of the pump head 1.

[0175] In addition, the size of the exhaust port 61 on the exhaust pipe 6 is 1-3 mm, so that the exhaust port 61 has a certain damping effect on the grease. After the exhaust port 61 is blocked by the grease, the grease will not continue to flow into the exhaust pipe 6 during the oil injection process, but when the grease in the oil chamber does not cover the exhaust port 61 and the gas pressure is relatively large, the exhaust port 61 blocked by the grease can be broken to allow the gas to enter the exhaust pipe 6 and be discharged. This arrangement can ensure that the grease will not be discharged in large quantities from the exhaust pipe 6 during the first oil injection. In the embodiment, the exhaust pipe 6 is a nylon pipe. A plug is provided at the outer opening of the exhaust joint 8. The plug serves as a blocking structure to close the exhaust passage after the first oil injection is completed, so that air from the outside cannot enter the oil bladder 3.

[0176] The pump head assembly further comprises a control device and a low liquid level detection module. The low liquid level detection module is used to monitor the liquid level in the oil bladder and feed back a signal to the control device when the liquid level in the oil bladder is at a set minimum liquid level to control the lubricating pump to stop. In the embodiment, the low liquid level detection module is arranged on the bracket and detects the liquid level in the oil bladder by a laser sensor. In other embodiments, a trigger block can be arranged on the rope, and a travel switch cooperating with the trigger block is arranged on the oil pressing spring mounting seat. The travel switch is triggered when the liquid level in the oil bladder is lower than the minimum liquid level. At this time, the travel switch constitutes the low liquid level detection module. In other embodiments, a linear displacement sensor can be used to monitor the position of the piston in the oil bladder in real time. The position of the piston reflects the liquid level of the grease in the oil bladder, so that more intelligent control or a reminding function can be realized according to the liquid level, or the lubricating pump can be controlled to stop at the minimum liquid level.

[0177] In order to improve the protection level of the oil bladder 3, the bracket is further covered with a transparent dustproof bag in the embodiment.

[0178] In order to press the lubricating grease in the oil bag 3 clean, in this embodiment, the lower side of the oil bag pressing disc 53 has a downward protruding lower boss 531, so that the pressing surface of the oil bag pressing disc for extruding the oil bag is outwardly protruding, the pump head top plate 11 of the pump head 1 is fixed with an oil bag bearing plate 12, the middle of the oil bag bearing plate 12 is provided with an upward protruding upper boss 121, so that the extrusion surface of the pump head for extruding the oil bag is outwardly protruding, after the oil bag 3 is compressed, the side walls of the oil bag 3 are stacked together, and there is still part of the lubricating grease in the oil bag 3, the lubricating grease in the middle of the oil bag 3 is extruded through the cooperation of the lower boss 531 of the oil bag pressing disc 53 and the upper boss 121 of the oil bag bearing plate 12, the utilization rate of the lubricating grease is improved, and the waste is reduced. In other embodiments, only one of the pressing surface of the pressing disc and the extrusion surface of the pump head is outwardly protruding.

[0179] In order to facilitate the disassembly and assembly of the oil bag, the oil bag connecting head 32 is arranged at the oil outlet 31 of the oil bag, and the oil bag connecting head 32 is fixed with the oil bag bearing plate 12 through threads. The pump head top plate 11 is provided with a top plate hole communicated with the oil outlet 31 of the oil bag. In other embodiments, the connecting head of the oil bag can be directly plugged with the pump head top plate and the oil bag bearing plate.

[0180] The replacement process of the oil bag 3 of the lubricating grease pumping device is as follows:

[0181] After the lubricating grease in the old oil bag is used up, the crank 54 is rotated to drive the resistance increasing shaft and the unwinding shaft 55 to rotate, the rope 51 is wound on the unwinding drum 52 by rotating the unwinding drum 52, the lower end of the rope 51 drives the lower end of the oil pressing spring 4 to move upward, the oil pressing spring 4 is gradually compressed, until the oil bag pressing disc 53 is separated from the oil bag 3, the space below the oil bag pressing disc 53 meets the requirements of disassembling and assembling the oil bag 3, at this time the oil bag pressing disc 53 is in place, at this time the rotation of the crank 54 is stopped, the ratchet 551 is locked by the pawl 552, the friction between the friction plate 71 and the friction block 72 is increased by adjusting the sleeve 73, the unwinding shaft 55 is locked by the friction therebetween, at this time the lower end of the oil pressing spring 4 cannot move downward, the connection between the first movable part 23 and the second movable part 24 is removed, the opening and closing hole is opened, the oil bag 3 is disassembled from the pump head 1, the old oil bag 3 is taken out, and then a new oil bag 3 is installed on the pump head 1.

[0182] The ratchet 551 is loosened, the friction between the friction plate 71 and the friction block 72 is reduced by adjusting the sleeve 73, so that the lower end of the oil pressing spring 4 gradually moves downward, until the oil bag pressing disc 53 contacts with the oil bag 3, the friction between the friction plate 71 and the friction block 72 is further reduced, and the friction is preferably zero. The first movable part 23 and the second movable part 24 are connected, the opening and closing hole is closed, and the replacement of the oil bag 3 is completed.

[0183] The lubricating grease pumping device of the present application is specifically embodied in the second embodiment, and the structure of the lubricating grease pumping device in this embodiment is different from that in the first embodiment as follows:Figures 8 to 10 As shown, the top of the support 201 is provided with an end loading / unloading opening, and the oil pressing spring mounting seat 202 is arranged at the end loading / unloading opening. The oil pressing spring mounting seat 202 is provided with two symmetrical hinged ears 203, and the two fixed columns 204 are each fixed with a hinged seat 205. The oil pressing spring mounting seat 202 is hinged with the two hinged seats 205 through the two hinged ears 203. After the hinged relationship between one of the hinged ears 203 and the corresponding hinged seat 205 is released, the oil pressing spring mounting seat 202 can be flipped through the other hinged ear 203. After the oil pressing spring mounting seat 202 is flipped, the end loading / unloading opening is opened. After the hinged relationship between the two hinged ears 203 and the corresponding hinged seats 205 is released, the oil pressing spring mounting seat 202 can be removed, and at this time, the end loading / unloading opening is also opened.

[0184] The opening state in the embodiment includes two states, one of which is the flipped oil pressing spring mounting seat 202, and the other is the state after the oil pressing spring mounting seat 202 is removed. In the two states, the spring mounting seat 202 opens the end loading / unloading opening. The oil bag can be taken out through the end loading / unloading opening, and a new oil bag can also be installed through the end loading / unloading opening. According to the installation space condition on site, the flipped or removed way can be selectively used to open the oil pressing spring mounting seat. The flipping direction can also be selected to fully utilize the space on site for oil bag replacement.

[0185] In the embodiment, the two hinged seats 205 and the hinged ears 203 have the same structure, and one of them will be described below.

[0186] The hinged seat 205 is provided with two spaced-apart supports 207, and the two supports 207 are provided with hinged holes. The hinged ear 203 is provided with a hinged ear hole corresponding to the hinged holes on the supports 207. One of the supports 207 is provided with a hinged shaft 208. In order to facilitate disassembly, the hinged shaft 208 in the embodiment is provided with a hinged shaft spring 209 and a spring matching protrusion 210. One end of the hinged shaft spring 209 is pressed on the spring matching protrusion 210. The hinged seat 205 is provided with a baffle 2101, and the other end of the hinged shaft spring 209 is pressed on the baffle 2101. The baffle 2101 is used to place the hinged shaft spring 209 out of the hinged shaft 208. The hinged shaft spring 209 is used to apply a force to the hinged shaft 208 to make the hinged shaft 208 pass through the hinged holes and the hinged ear hole. In the embodiment, the spring matching protrusion 210 is annular. The spring matching protrusion 210 is in abutting engagement with the hinged shaft spring 209 on one side of the hinged shaft 208 in the axial direction, and in abutting engagement with the support 207 on the other side.

[0187] The baffle 2101 is provided with a hinge shaft through hole through which the hinge shaft 208 passes, and the hinge shaft 208 is provided with a baffle cap 2102 at one end of the hinge shaft through hole, which is in abutting cooperation with the baffle 2101 under the action of the hinge shaft spring 209.

[0188] The hinge shaft 208, the hinge shaft spring 209 and the baffle 2101 on the two supports 207 in the embodiment constitute a mounting position limiting structure for limiting the pressure oil spring mounting seat 202 in the closed state. The hinge lug 203 on the pressure oil spring mounting seat 202 constitutes a hinge part hinged with the fixed column 211.

[0189] In other embodiments, the pressure oil spring mounting seat can also be provided with only one hinge lug, and a detachable fixing structure for the fixed column is further provided on the pressure oil spring mounting seat, for example, a fixing hole is provided on the pressure oil spring mounting seat, and a corresponding fixing bolt is provided on the fixed column, and the pressure oil spring mounting seat is fixed by the fixing bolt. When the pressure oil spring mounting seat needs to be turned over, the fixing bolt is removed, and the pressure oil spring mounting seat is turned over.

[0190] In other embodiments, the pressure oil spring mounting seat can also be opened and closed at the end part in a manner other than turning over, for example, the pressure oil spring mounting seat is directly removed from the frame body, and after the oil bag is replaced, the pressure oil spring mounting seat is reinstalled.

[0191] In other embodiments, the fixed column is provided with three, four or more than five, and the pressure oil spring mounting seat can be fixed with multiple fixed columns at this time.

[0192] The grease pumping device of the embodiment 3 of the present application is different from the structure of the above-mentioned embodiment 1 in that, as shown in Figure 11 In the embodiment, the resistance increasing structure is an eddy current resistance increasing structure 301, and the pressure oil spring mounting seat 302 further includes a driving motor 303 in the embodiment, and the driving motor 303 drives the unwinding drum 52 to rotate.

[0193] The eddy current resistance increasing structure 301 is a prior art, which will not be described here. The principle of generating the eddy current resistance is that when a conductor plate moves in a static magnetic field at a relative speed V, according to the Lenz law, the conductor plate will be subjected to a force to inhibit its movement. This is because the relative movement of the conductor plate and the static magnetic field causes the generation of a dynamic electromotive force in the conductor plate, which causes the movement of electric charges to form an electric eddy current. These electric eddy currents are subjected to the Lorentz force of the external magnetic field, and the direction is always opposite to the movement direction of the conductor plate, thereby forming a resistance, i.e. an eddy current resistance. In the embodiment, the control of the pressure oil spring resistance is realized by controlling the on-off of the current of the eddy current resistance increasing structure, so that the eddy current resistance increasing structure only provides resistance to the pressure oil spring when changing from the retracted state to the pressure oil state.

[0194] In other embodiments, the resistance increasing structure can also be a damping oil resistance increasing structure, and the specific damping oil resistance increasing structure is a one-way viscous damper, which is a prior art and will not be described here. Of course, in other embodiments, the resistance increasing structure can also be a two-way viscous damper. In other embodiments, the damping oil resistance increasing structure can also be a one-way rotary damper, such as the one-way rotary damper disclosed in the authorized announcement CN105781304B.

[0195] Specific embodiment 4 of the grease pumping device of the application, the structure of the grease pumping device in this embodiment is different from that in the specific embodiment 1 described above in that, as shown in Figure 12 and Figure 13 In this embodiment, a clutch structure is arranged between the crank and the unwinding shaft 402, the crank is connected with a crank shaft 403, the crank shaft 403 is provided with a connecting section 401 with a hexagonal cross section, the unwinding shaft 402 is provided with a hexagonal hole for inserting the connecting section 401, and the crank shaft 403 is axially guided and slidingly assembled on the oil pressing spring mounting seat. During use, the connection and separation of the crank shaft 403 and the unwinding shaft can be realized by pushing and pulling the crank.

[0196] Specific embodiment 5 of the grease pumping device of the application, the structure of the grease pumping device in this embodiment is different from that in the specific embodiment 1 described above in that: the rotating friction member is assembled on the unwinding shaft through a one-way bearing so that the rotating friction member rotates with the unwinding shaft when the unwinding shaft reverses. As shown in Figure 14 In this embodiment, the friction block 501 is fixed with the outer ring of the one-way bearing 502, and the inner ring of the one-way bearing 502 is assembled on the unwinding shaft 503 through a rotation stopping key. The friction block 501 is provided with a friction pad 504 matched with the friction plate.

[0197] Specific embodiment 6 of the grease pumping device of the application, the structure of the grease pumping device in this embodiment is different from that in the specific embodiment 1 described above in that:

[0198] As shown in Figure 15 The oil bag 601 includes a peripheral wrinkle area 602 and a middle intermediate area 603, and the thickness of the wrinkle area 602 after compression is greater than that of the intermediate area 603 after compression.

[0199] The oil bag pressing disc can extrude the grease in the oil bag 601 to the pump head 604, but there is a problem that after the grease is extruded by the compression of the oil bag 601, the oil bag 601 is under negative pressure. After the oil bag pressing disc returns, due to the sealing fit between the opening of the oil bag 601 and the pump head 604, the oil bag 601 is easy to suck the grease in the pump head 604 when it elastically returns,

[0200] To solve this problem, in this embodiment, spikes 607 are fixed on both the oil bladder pressure plate 605 and the oil bladder support plate 606, such as... Figure 15 As shown, the spikes 607 are generally tapered structures with a gradually changing outer diameter. The tips of all spikes 607 face the oil bladder 601 and are made of metal or other hard materials. The spikes 607 on the oil bladder pressure plate 605 and the oil bladder support plate 606 correspond vertically to the folded areas 602. This arrangement has the advantage that after the oil bladder 601 is compressed, the thickness of the folded areas 602 is greater, preventing the spikes 607 from completely piercing them. The spikes 607 can be fixed to the oil bladder pressure plate 605 and the oil bladder support plate 606 by welding or other methods. In other embodiments, the spikes can also be fixed to the oil bladder pressure plate and the oil bladder mounting base by threaded assembly, bonding, or other methods.

[0201] During use, the oil bladder pressure plate 605 applies pressure to the oil bladder 601, compressing it. The spikes 607 on the pressure plate 605 and the oil bladder support plate 606 pierce the oil bladder 601. Due to the viscous nature of the grease, the pressure plate 605 continuously applies pressure to the oil bladder, preventing air and grease leakage between the spikes 607 and the oil bladder 601. The grease only enters the pump head 604. During loading, the pressure plate 605 applies pressure to the folded area 602 of the oil bladder 601 from all sides, while the lower protrusion of the pressure plate 605 applies pressure to the central area 603 of the oil bladder 601. The shape of the oil bladder 601 when compressed to its limit is as follows... Figure 2 As shown, at this extreme position, the spikes 607 on the oil bladder pressure plate 605 do not contact the pump head 604, and the spikes 607 on the pump head 604 also do not contact the oil bladder pressure plate 605. After the oil bladder pressure plate 605 is unloaded, the oil bladder 601 rebounds, the spikes 607 separate from the oil bladder 601, and the hole formed at the point where the spikes 607 pierce the oil bladder 601 is opened, forming a connecting hole that connects the inside and outside of the oil bladder 601. Air enters the oil bladder 601, relieving the negative pressure inside the oil bladder 601 and preventing the oil bladder from sucking up the lubricating grease.

[0202] In this embodiment, in order to further prevent grease leakage after the spike 607 pierces the oil bladder 601, the oil bladder 601 is made of an elastic material, such as rubber. When the spike 607 pierces the oil bladder 601, the oil bladder 601 squeezes the spike to avoid creating a gap.

[0203] The oil bladder 601 has an oil bladder recess at both ends, which is recessed into the oil bladder. The oil bladder recesses at both ends are adapted to the pressure plate extrusion surface 609 and the pump head extrusion surface 610 protruding from the oil bladder pressure plate and the oil bladder support plate, respectively, so that the pressure plate extrusion surface 609 and the pump head extrusion surface 610 can extrude the oil bladder 601. Even when the elasticity of the oil bladder is small, it can still ensure that the oil in the oil bladder is squeezed out. Of course, in other embodiments, only one end can be provided with an oil bladder recess. When the elasticity of the oil bladder is good, the oil bladder recess can be omitted.

[0204] The grease pumping device of the present application is provided with a support, a winding-off part, a pump head, an oil bag, and a locking structure.

[0205] The grease pumping device of the present application is provided with a support, a winding-off part, a pump head, an oil bag, and a locking structure.

[0206] The grease pumping device of the present application is provided with a support, a winding-off part, a pump head, an oil bag, and a locking structure.

[0207] The grease pumping device of the present application is provided with a support, a winding-off part, a pump head, an oil bag, and a locking structure.

[0208] The grease pumping device of the present application is provided with a support, a winding-off part, a pump head, an oil bag, and a locking structure.

[0209] The grease pumping device of the present application is provided with a support, a winding-off part, a pump head, an oil bag, and a locking structure.

[0210] The grease pumping device of the present application is provided with a support, a winding-off part, a pump head, an oil bag, and a locking structure.

[0211] The grease pumping device of the present application, in embodiment 14, differs from the structure of the above-mentioned embodiment 1 in that the limiting structure is a clamp connected to the fixed column.

[0212] The grease pumping device of the present application, in embodiment 15, differs from the structure of the above-mentioned embodiment 1 in that the bracket includes a guide, the oil bladder pressing disc and the guide are in sliding fit in the axial direction of the oil pressing spring, the guide is a guide cylinder, and the oil bladder pressing disc and the cylinder wall of the guide cylinder are in sliding fit. In other embodiments, the oil pressing spring can be connected with a spring seat, and the spring seat and the guide are in sliding fit in the axial direction of the oil pressing spring.

[0213] The grease pumping device of the present application, in embodiment 16, differs from the structure of the above-mentioned embodiment 1 in that, as shown in Figures 16 to 21 The three fixed columns are arranged in a triangular shape, and the side of the fixed column in the embodiment faces the oil bladder to form an oil bladder guiding surface for guiding the outer periphery of the oil bladder in the axial direction and limiting the oil bladder in the radial direction to prevent the oil bladder from being skewed.

[0214] The two fixed columns far away from each other form a side loading and unloading opening for loading and unloading the oil bladder 166, and the side loading and unloading opening is on the side of the bracket 161 perpendicular to the moving direction of the oil bladder pressing disc 165. One end of the fixed column 162 is fixed on the pump head 163, and the other end is fixed with the oil pressing spring mounting seat 164. In the embodiment, the oil pressing spring mounting seat 164 is detachably fixed with the fixed column 162, and the oil pressing spring mounting seat 164 can be detached to detach and assemble the oil bladder 166 from the top. The oil pressing spring mounting seat 164 is in the shape of a disc, which is simple in structure and convenient to install. In other embodiments, the oil pressing spring mounting seat can be hingedly connected to one fixed column at one end and detachably fixed at the other end, and the oil bladder can be detached and assembled by turning over the oil pressing spring mounting seat. At this time, the bracket top forms a top loading and unloading opening.

[0215] Since the bracket 161 is provided with the side loading and unloading opening, in order to ensure the stability of the oil bag 166, the bracket 161 is sleeved with the protection cylinder 167 for protecting the oil bag 166 in the embodiment, the fixed column 162 is in the inner hole of the protection cylinder 167, and the end of the fixed column 162 away from the pump head 163 extends out of the protection cylinder 167 and is fixed with the oil pressing spring mounting seat 164. The protection cylinder 167 comprises a cylinder body 168 and a protection door 169, the protection door 169 is hinged on the cylinder body 168, the protection door 169 can be opened or closed to the side loading and unloading opening, the protection door 169 is a double door in the embodiment, and the overlapping part of the two doors of the protection door 169 is provided with a buckle 1610, and the protection door 169 is buckled after being closed. The double door needs small space for opening and closing, and is suitable for small space.

[0216] The hinged position of the protection door 169 and the cylinder body 168 is provided with a hinge shaft, the hinge ears 1611 protruding into the protection cylinder 167 are arranged at the hinge positions of the protection door 169 and the cylinder body 168, the hinge shaft passes through the hinge ears 1611 of the protection door 169 and the cylinder body 168, and the hinge of the protection door 169 and the cylinder body 168 is realized. Since the hinge ears 1611 are in the protection cylinder 167, the hinge shaft is also in the protection cylinder 167. In the embodiment, the lower end of the hinge shaft is fixed on the pump head, the lower end of the hinge shaft is provided with an annular boss, and the fixing of the hinge shaft is realized by pressing the annular boss through the bolt connected with the pump head.

[0217] The oil bag pressing disc 165 is provided with a guide groove 1612 in sliding fit with the fixed column 162, the guide groove 1612 is a U-shaped groove, the oil bag pressing disc 165 slides in the guide groove 1612 and the fixed column 162, and the stability of the oil bag pressing disc 165 in the moving process is improved. In order to further improve the guiding effect, the edge of the oil bag pressing disc 165 is provided with an annular protrusion 1613 protruding towards the pump head 163, the guide groove 1612 penetrates the annular protrusion 1613, the length of the guide groove 1612 in the extension direction of the fixed column 162 is increased by arranging the annular protrusion 1613, and the guiding fit effect of the guide groove 1612 and the fixed column 162 is improved. The fixed column 162 is arranged in the guide groove 1612 of the oil bag pressing disc 165, the oil bag 166 can be protected by the protection cylinder 167 and the fixed column 162 at the same time, and the protection effect of the oil bag 166 is further improved.

[0218] In this embodiment, the bracket 161 is provided with a cover 1614 away from the top of the pump head 163, the cover 1614 is fixed on the oil spring mounting seat 164 by screws, the cover 1614 is used to seal with the protective cylinder 167 in the moving direction of the oil bag pressure disc 165, so as to cover the bracket 161 and the oil bag 166. The protective cylinder 167 is sleeved outside the three fixed columns 162 of the bracket 161, one end face is supported with the pump head 163, the other end is in close contact with the cover 1614, and is kept between the cover 1614 and the pump head 163.

[0219] The protective cylinder and the protective cover need to be sealed as a whole, so the matching place of the two and the matching place of the two with the pump head are provided with sealing rubber strips for sealing.

[0220] The pump head and the cover are provided with a stop edge for limiting the protective door when it is closed, so as to prevent the protective door from being damaged due to collision after being closed. The strength and rigidity of the protective door in the closed state are improved to prevent damage to the hinge. The stop edge is closely attached to the protective door to facilitate sealing to effectively prevent water, and can also avoid the generation of large noise due to the shaking of the protective door in a vibrating environment.

[0221] In this embodiment, the oil spring mounting seat 164 is provided with a rope through hole and a weight reduction hole 1616 for the rope 1615 to pass through, the unwinding part is an unwinding drum 1618 arranged on one side of the oil spring mounting seat 164 facing the oil spring 1617, the unwinding drum 1618 is provided with an unwinding motor 1619, one end of the unwinding motor 1619 is fixed with the oil spring mounting seat 164, the other end drives the unwinding drum 1618 to rotate, a spiral winding groove 1620 is arranged on the outer periphery of the unwinding drum 1618, which is used to guide the rope 1615 to wind along the spiral winding groove 1620. The oil spring mounting seat 164 is provided with a motor mounting seat 1621 and a winding drum mounting seat 1622, the motor output shaft 1624 of the unwinding motor 1619 is fixed with the unwinding drum 1618, the motor shell 1623 of the unwinding motor 1619 is fixed on the motor mounting seat 1621, one end of the unwinding drum 1618 is rotatably matched with the motor shell 1623, and the other end is rotatably assembled on the winding drum mounting seat 1622.

[0222] In this embodiment, the unwinding motor 1619 is a speed reduction motor, and the unwinding motor 1619 comprises a speed reduction structure. In this embodiment, the speed reduction structure is a multi-stage speed reduction gear. After the unwinding motor 1619 stops, the unwinding drum 1618 is locked by the resistance provided by the speed reduction structure, so that the oil spring cannot be elongated. In this embodiment, the speed reduction structure constitutes the locking structure of the spring winding and unwinding mechanism. The resistance formed by the multi-stage speed reduction gear is very large, and when power is off, the oil spring force cannot pull the motor. In this embodiment, the unwinding and winding of the rope 1615 is controlled by controlling the start and stop and forward and reverse rotation of the unwinding motor 1619.

[0223] Since the unwinding drum 1618 and the oil pressing spring 1617 in the embodiment are arranged on the same side of the oil pressing spring mounting seat 164, the rope 1615 needs to be reversed twice before being wound on the unwinding drum 1618, in order to reduce the friction force and facilitate the winding and unwinding of the rope 1615, the oil pressing spring mounting seat 164 is provided with two reversing pulleys 1625 in the embodiment, the rope 1615 is wound on the two reversing pulleys 1625, and the reversing is realized twice. The reversing pulley 1625 can guide and position the rope 1615 on one hand, facilitate the winding of the rope 1615, and the friction resistance between the rope 1615 and the reversing pulley 1625 is small on the other hand, so that the rope 1615 is more labor-saving when unwinding, and the wear of the rope 1615 and the support 161 is also reduced. In other embodiments, the rope can also slide relative to the oil pressing spring mounting seat.

[0224] The grease pumping device of the embodiment 17 of the present application is different from the structure of the embodiment 16 in that the protective cylinder is injection molded, the thinning part is arranged at the connection between the protective door and the cylinder body, and the protective door is deformed to open or close the side loading and unloading opening through the thinning part.

[0225] The grease pumping device of the embodiment 18 of the present application is different from the structure of the embodiment 16 in that the protective cylinder is an integrated structure, and the protective cylinder is sleeved on the support from top to bottom.

[0226] The grease pumping device of the embodiment 19 of the present application is different from the structure of the embodiment 16 in that the thickness of the oil bag pressing disc is relatively thick, and the outer periphery of the oil bag pressing disc is not provided with the annular protrusion.

[0227] The grease pumping device of the embodiment 20 of the present application is different from the structure of the embodiment 16 in that the unwinding motor is arranged on one side of the axis of the winding drum.

[0228] The grease pumping device of the present application is specifically embodied in Embodiment 21, wherein the structure of the grease pumping device is different from that of Embodiment 16 above in that four fixed vertical columns are arranged in the present embodiment. In other embodiments, only two fixed vertical columns can be arranged, and the center lines of the two fixed vertical columns pass through the center of the oil bag pressing disc. In this case, two side loading and unloading openings are arranged.

[0229] The grease pumping device of the present application is specifically embodied in Embodiment 22, wherein the structure of the grease pumping device is different from that of Embodiment 16 above in that three ropes are arranged, and the three ropes are arranged in a triangular distribution to pull the oil bag pressing disc. Correspondingly, three unwinding members are arranged. In the present embodiment, the oil bag pressing disc is not prone to deflection by controlling the three ropes to synchronously pull and release the oil bag pressing disc. In the present embodiment, the structure for guiding the oil bag pressing disc can not be arranged. Of course, in other embodiments, more than four ropes can be arranged.

[0230] The grease pumping device of the present application is specifically embodied in Embodiment 23, wherein the structure of the grease pumping device is different from that of Embodiment 16 above in that the guide groove is a C-shaped groove. In other embodiments, the guide groove can also be a V-shaped groove. Of course, the guide groove can also be replaced by a circular hole. In other embodiments, the oil bag pressing disc can be provided with both a guide groove and a guide hole.

[0231] The grease pumping device of the present application is specifically embodied in Embodiment 24, wherein the structure of the grease pumping device is different from that of Embodiment 16 above in that a protrusion is arranged on the oil bag pressing disc, the protrusion constitutes a sliding block, and a vertical long groove is arranged on the vertical column, the vertical long groove constitutes a guide sliding groove, and the protrusion slides in the vertical long groove.

[0232] The grease pumping device of the present application is specifically embodied in Embodiment 25, wherein the structure of the grease pumping device is different from that of Embodiment 16 above in that the protective door is a single door. The single door occupies a large space but has a simple structure, and is suitable for use in a large space.

[0233] The grease pumping device of the embodiment 26 of the present application is different from the structure of the embodiment 16 in that the inner side of the protection cylinder is provided with an inwardly protruding guide rib, which is used for guiding the oil bag to prevent the oil bag from being skewed, especially during the compression of the oil bag, the guiding effect of the guide rib on the oil bag can further prevent the oil bag pressure disc from being skewed, and the guiding effect of the guide rib is more obvious when no guiding structure is arranged for the oil bag pressure disc. Since the diameter of the oil bag increases after compression, in order not to affect the compression of the oil bag, the width of the guide rib in the radial direction of the protection cylinder gradually decreases in the direction close to the pump head. The guide rib is provided with multiple guide ribs and is arranged in the circumferential direction of the protection cylinder. In other embodiments, the guide rib can be provided with only two guide ribs, or the guide ribs can be arranged in the axial direction of the protection cylinder.

[0234] The grease pumping device of the embodiment 27 of the present application is different from the structure of the embodiment 16 in that, as shown in Figure 22 The inner circumferential surface 221 of the protection cylinder forms an oil bag guiding surface for guiding the outer circumferential surface of the oil bag 226 in the axial direction and limiting the oil bag 226 in the radial direction to prevent the oil bag 226 from being skewed. The protection cylinder 222 has an outwardly protruding protection cylinder outwardly protruding portion 223, and the inner side of the protection cylinder outwardly protruding portion 223 forms a fixed column avoiding groove 224 opening towards the inside of the protection cylinder, and the fixed column 225 is arranged in the fixed column avoiding groove 224. The protection cylinder 222 is injection molded, and the protection door 228 and the cylinder body 229 are connected at the thinning portion 227, and the protection door is deformed to open or close the side loading and unloading opening through the thinning portion.

[0235] The pump head assembly of the embodiment of the present application has the same structure as the pump head assembly of any one of the above-mentioned embodiments of the grease pump, and will not be described again.

[0236] The above is only the preferred embodiment of the present application, and does not limit the present application, the patent protection scope of the present application is subject to the claims, any equivalent structural changes made by referring to the content of the specification and drawings of the present application should also be included in the protection scope of the present application.

Claims

1. A pump head assembly, comprising: a pump head configured to detachably connect with an oil bag; a support fixed on the pump head and configured to protect the oil bag; an oil pressing spring arranged on the support; characterized in that the pump head assembly further comprises: an oil bag pressing disc configured to support a lower end of the oil pressing spring and press the oil bag; a spring winding and unwinding mechanism arranged on the support, comprising a rope connected with the oil bag pressing disc, and a winding and unwinding device configured to wind and unwind the rope; the rope is wound by forward rotation of the winding and unwinding device, so that the oil bag pressing disc is driven by the rope to move away from the pump head; the rope is unwound by reverse rotation of the winding and unwinding device, so that the oil bag pressing disc is driven by the elastic force of the oil pressing spring to move towards the pump head, thereby realizing reciprocating movement of the oil bag pressing disc along the axial direction of the oil pressing spring to wind and unwind the oil pressing spring; the oil pressing spring has a retracted state leaving a space for replacing the oil bag and an oil pressing state for pressing the oil bag; the spring winding and unwinding mechanism further comprises a locking structure configured to lock the winding and unwinding device or the rope or the oil bag pressing disc when the oil pressing spring is in the retracted state, so that the oil pressing spring cannot be elongated; the spring winding and unwinding mechanism comprises a resistance increasing structure configured to apply resistance to the oil pressing spring when the locking structure is unlocked, so as to reduce the resultant force acting on the oil bag pressing disc; a lower protrusion protruding downward is arranged on the lower side of the oil bag pressing disc to press the middle area of the oil bag; an upper protrusion protruding upward is arranged in the middle of an oil bag bearing plate on the pump head; the middle part of the oil bag is extruded by cooperation of the lower protrusion of the oil bag pressing disc and the upper protrusion of the oil bag bearing plate.

2. The pump head assembly of claim 1, wherein, The resistance increasing structure is a one-way resistance increasing structure.

3. The pump head assembly of claim 1, wherein, The resistance increasing structure is an eddy current resistance increasing structure, a mechanical friction resistance increasing structure or a damping oil resistance increasing structure.

4. The pump head assembly of claim 2, wherein, The spring winding and unwinding mechanism comprises a winding and unwinding shaft, the resistance increasing structure comprises a rotating friction member and a cooperating friction member cooperating with the rotating friction member, the rotating friction member is assembled on the winding and unwinding shaft through a one-way bearing so that the rotating friction member rotates with the winding and unwinding shaft when the winding and unwinding shaft is reversed, the cooperating friction member is rotationally fixed on the support, the winding and unwinding shaft is fixedly connected with the winding and unwinding device, and the resistance increasing structure further comprises a pressure adjusting structure configured to adjust the pressure between the rotating friction member and the cooperating friction member; the pressure adjusting structure increases the pressure between the rotating friction member and the cooperating friction member to lock the winding and unwinding device when the oil pressing spring is in the retracted state, reduces the pressure between the rotating friction member and the cooperating friction member to form resistance to the oil pressing spring when the oil pressing spring is released from the retracted state to the oil pressing state, and makes the pressure between the rotating friction member and the cooperating friction member zero when the oil pressing spring is in the oil pressing state.

5. The pump head assembly of claim 1, wherein, The spring winding and unwinding mechanism comprises a winding and unwinding shaft, the resistance increasing structure comprises a rotating friction member and a cooperating friction member cooperating with the rotating friction member, the rotating friction member is rotationally assembled on the winding and unwinding shaft, the cooperating friction member is rotationally fixed on the support, the winding and unwinding shaft is fixedly connected with the winding and unwinding device, and the resistance increasing structure further comprises a pressure adjusting structure configured to adjust the pressure between the rotating friction member and the cooperating friction member; The pressure adjusting structure increases the pressure between the rotating friction part and the matched friction part when the oil pressure spring is in the retracted state to lock the unwinding part, decreases the pressure between the rotating friction part and the matched friction part when the oil pressure spring is released from the retracted state to the oil pressure state to form resistance to the oil pressure spring, and makes the pressure between the rotating friction part and the matched friction part zero when the oil pressure spring is in the oil pressure state and is compressed from the oil pressure state to the retracted state.

6. A pump head assembly according to claim 4 or 5, wherein, The pressure adjusting structure includes an adjusting sleeve arranged on the support through screwing, and the pressure between the rotating friction part and the matched friction part is adjusted by pressing the rotating friction part or the matched friction part through screwing of the adjusting sleeve.

7. The pump head assembly of claim 6, wherein, The adjusting sleeve and the rotating friction part are provided with balls, and the adjusting sleeve presses the rotating friction part through the balls.

8. The pump head assembly of claim 6, wherein, The adjusting sleeve and the rotating friction part or the matched friction part are provided with elastic elements.

9. The pump head assembly of any one of claims 1-5, wherein, The support includes a guide part, and the oil bag pressing disc is guided to slide in the axial direction of the oil pressure spring, or the oil pressure spring is connected with a spring seat, and the spring seat is guided to slide in the axial direction of the oil pressure spring.

10. The pump head assembly of claim 9, wherein, The guide part is a guide cylinder, and the oil bag pressing disc or the spring seat is guided to slide with the cylinder wall of the guide cylinder.

11. The pump head assembly of any one of claims 1-4, wherein, The locking structure locks the unwinding part to prevent reverse rotation of the unwinding part, and includes a ratchet wheel in transmission connection with the unwinding part, and a pawl movably arranged on the support to lock the ratchet wheel.

12. The pump head assembly of any one of claims 1-5, wherein, The support has a side surface loading and unloading opening on a side perpendicular to the moving direction of the oil bag pressing disc for loading and unloading the oil bag.

13. The pump head assembly of claim 12, wherein, The support is provided with a limiting structure for limiting the oil bag in the circumferential direction, and the limiting structure has an opening and closing opening capable of being opened and closed, and the opening and closing opening constitutes the side surface loading and unloading opening.

14. The pump head assembly of claim 13, wherein, The support includes at least two fixed columns fixed on the pump head, and the fixed columns extend in the moving direction of the oil bag pressing disc, and the limiting structure includes a first movable part and a second movable part hinged on the fixed columns, and the two movable parts are detachably connected to form the opening and closing opening at the connection of the first movable part and the second movable part, and the first movable part and the second movable part are opened to load and unload the oil bag after being detached.

15. The pump head assembly of any one of claims 1-5, wherein, The support includes a frame body and an oil pressure spring mounting seat arranged on the frame body, one end of the oil pressure spring is mounted on the oil pressure spring mounting seat, an end portion of the frame body in the axial direction of the oil pressure spring is provided with an end portion loading and unloading opening, the oil pressure spring mounting seat is arranged at the end portion loading and unloading opening, and the oil pressure spring mounting seat has an open state of opening the end portion loading and unloading opening and a closed state of closing the end portion loading and unloading opening.

16. The pump head assembly of claim 15, wherein, The oil pressure spring mounting seat includes two symmetrical hinged parts hinged with the frame body through a hinged shaft and detachable, so that the oil pressure spring mounting seat and the frame body can be flipped around the corresponding hinged shaft of one hinged part when the other hinged part is hinged, and the end portion loading and unloading opening is opened.

17. The pump head assembly of any one of claims 1-5, wherein, The pump head is provided with an air exhaust structure for exhausting air in the pump head when oil is injected into the pump head.

18. The pump head assembly of claim 17, wherein, The exhaust structure comprises an exhaust pipe arranged at the top of the pump head inner cavity, the exhaust pipe is provided with a plurality of exhaust ports arranged at intervals along the length direction of the exhaust pipe, and the shell of the pump head is provided with an exhaust joint communicating the pump head inner cavity and the outside of the pump head.

19. The pump head assembly of any one of claims 1-5, wherein, The spring winding and unwinding mechanism comprises a winding drive motor for driving the winding member to rotate.

20. The pump head assembly of any one of claims 1-5, wherein, The spring winding and unwinding mechanism comprises a crank handle for driving the winding member to rotate, and a clutch structure is arranged between the winding member and the crank handle to disconnect the power transmission path between the winding member and the crank handle, or a one-way bearing is arranged between the winding member and the crank handle to enable the crank handle to drive the winding member to rotate in the forward direction.

21. The pump head assembly of any one of claims 1-5, wherein, The spring winding and unwinding mechanism comprises a crank handle for driving the winding member to rotate, and the crank handle comprises a connecting crank arm and an operating handle, the operating handle being hinged to the connecting crank arm to enable the operating handle to be folded and stored.

22. The pump head assembly of any one of claims 1-5, wherein, The pump head assembly further comprises a control device and a low liquid level detection module, the low liquid level detection module being used for monitoring the liquid level of the oil bag and feeding back a signal to the control device when the liquid level in the oil bag is at a set minimum liquid level to control the lubricating pump to stop.

23. The pump head assembly of any one of claims 1-5, wherein, The support comprises at least two fixed columns, the fixed columns being fixed to the pump head and extending along the moving direction of the oil bag pressing disc, and the oil bag pressing disc and the fixed columns are in a guiding and sliding fit in the moving direction of the oil bag pressing disc.

24. The pump head assembly of claim 23, wherein, The outer periphery of the oil bag pressing disc is provided with guiding grooves in a guiding and sliding fit with the fixed columns, and / or the oil bag pressing disc is provided with guiding holes through which the fixed columns pass and in a guiding and sliding fit with the fixed columns.

25. The pump head assembly of claim 23, wherein, The support is provided with a protection cylinder for protecting the oil bag, and the fixed columns are located in the protection cylinder.

26. The pump head assembly of claim 25, wherein, At least one pair of adjacent fixed columns forms a side loading and unloading opening for loading and unloading the oil bag, the protection cylinder comprises a cylinder body and a protection door, and the protection door is used for opening or closing the side loading and unloading opening.

27. The pump head assembly of claim 26, wherein, The protection cylinder is injection molded, the protection door is provided with a thinned portion at the connection with the cylinder body, and the protection door is deformed to open or close the side loading and unloading opening through the thinned portion.

28. The pump head assembly of claim 26, wherein, The protection door is hinged to the cylinder body.

29. The pump head assembly of claim 25, wherein, The fixed columns and / or the protection cylinder are provided with an oil bag guiding surface for guiding the outer periphery of the oil bag in the axial direction and limiting the oil bag in the radial direction to prevent the oil bag from being skewed.

30. The pump head assembly of claim 29, wherein, The inner periphery of the protection cylinder forms the oil bag guiding surface, the protection cylinder has an outwardly convex protection cylinder outwardly convex portion, the inner side of the protection cylinder outwardly convex portion forms a fixed column avoiding groove opening inwardly toward the protection cylinder, and the fixed columns are located in the fixed column avoiding groove.

31. The pump head assembly of any of claims 25-30, wherein, The support is provided with a cover away from the top cover of the pump head, and the cover and the protection cylinder are in a sealed and closed fit in the moving direction of the oil bag pressing disc.

32. The pump head assembly of any one of claims 25-28, wherein, The inner side of the protection cylinder is provided with a guiding rib for guiding the oil bag to prevent the oil bag from being skewed.

33. The pump head assembly of any one of claims 1-5, wherein, The ropes are provided in multiple numbers, three of which are arranged in a triangular shape for synchronously acting on the oil bag pressing disc to maintain the posture of the oil bag pressing disc.

34. The pump head assembly of any one of claims 1-5, wherein, The support is provided with a reversing pulley, and the ropes are wound around the reversing pulley.

35. The pump head assembly of any one of claims 1-5, wherein, The spring winding and unwinding mechanism comprises a winding drive motor for driving the winding member to rotate, and the winding member is locked by the winding drive motor to prevent the oil pressing spring from being elongated.

36. The pump head assembly of claim 35, wherein, The winding drive motor is a speed reduction motor, the winding drive motor comprises a speed reduction structure, and the winding member is locked by the resistance provided by the speed reduction structure after the winding drive motor is stopped; The speed reduction structure constitutes the locking structure.

37. The pump head assembly of claim 35, wherein, The unwinding member is a winding drum, and the unwinding drive motor is arranged in the winding drum.

38. The pump head assembly of any one of claims 1-5, wherein, The support includes an oil pressing spring mounting seat arranged on the top, and the unwinding member is arranged on the side of the oil pressing spring mounting seat facing the pump head, and the unwinding member is on the side of the oil pressing spring perpendicular to the moving direction of the oil bag pressing disc.

39. A pump head assembly, comprising: a pump head configured to detachably connect with an oil bag; a support fixed on the pump head and configured to protect the oil bag; an oil pressing spring arranged on the support; characterized in that the pump head assembly further comprises: an oil bag pressing disc configured to support the lower end of the oil pressing spring and press the oil bag; a spring winding and unwinding mechanism arranged on the support, comprising a rope connected with the oil bag pressing disc, and an unwinding member configured to unwind the rope; the rope is wound by forward rotation of the unwinding member, so that the oil bag pressing disc is driven by the rope to move away from the pump head; the rope is unwound by reverse rotation of the unwinding member, so that the oil bag pressing disc is driven by the elastic force of the oil pressing spring to move towards the pump head, thereby realizing the reciprocating movement of the oil bag pressing disc along the axial direction of the oil pressing spring to wind and unwind the oil pressing spring; the oil pressing spring has a retracted state leaving space for replacing the oil bag and an oil pressing state for pressing the oil bag; the spring winding and unwinding mechanism further comprises a locking structure configured to lock the unwinding member or the rope or the oil bag pressing disc when the oil pressing spring is in the retracted state, so that the oil pressing spring cannot be elongated; the locking structure is a resistance increasing structure, which locks the unwinding member to prevent the unwinding member from being reversely rotated to elongate the rope, the spring winding and unwinding mechanism comprises an unwinding shaft, the resistance increasing structure comprises a rotating friction member and a cooperating friction member cooperating with the rotating friction member, the rotating friction member is rotationally assembled on the unwinding shaft, and the cooperating friction member is rotationally arranged on the support, the unwinding shaft is fixedly connected with the unwinding member, and the resistance increasing structure further comprises a pressure adjusting structure configured to adjust the pressure between the rotating friction member and the cooperating friction member; the pressure adjusting structure is configured to increase the pressure between the rotating friction member and the cooperating friction member to lock the unwinding member when the oil pressing spring is in the retracted state, to decrease the pressure between the rotating friction member and the cooperating friction member to form resistance to the oil pressing spring when the oil pressing spring is released from the retracted state to the oil pressing state, and to make the pressure between the rotating friction member and the cooperating friction member zero when the oil pressing spring is in the oil pressing state and is compressed from the oil pressing state to the retracted state; the lower side of the oil bag pressing disc has a downward protrusion configured to press the middle region of the oil bag, and the middle of the oil bag bearing plate on the pump head has an upward protrusion, the middle part of the oil bag is squeezed out by cooperation of the downward protrusion of the oil bag pressing disc and the upward protrusion of the oil bag bearing plate.

40. The pump head assembly of claim 39, wherein, the pressure adjusting structure comprises an adjusting sleeve screwed on the support, the pressure between the rotating friction member and the cooperating friction member is adjusted by screwing the adjusting sleeve to press the rotating friction member, the adjusting sleeve and the rotating friction member are in rolling friction, or the pressure between the rotating friction member and the cooperating friction member is adjusted by screwing the adjusting sleeve to press the cooperating friction member.

41. The pump head assembly of claim 40, wherein, the adjusting sleeve and the rotating friction member are provided with balls, and the adjusting sleeve presses the rotating friction member through the balls.

42. The pump head assembly of claim 40, wherein, the adjusting sleeve and the rotating friction member or the cooperating friction member are provided with elastic members.

43. The pump head assembly of any of claims 39-42, wherein, The support comprises a guide, the oil bag pressing disc is guided to slide in the axial direction of the oil pressing spring, or the oil pressing spring is connected with a spring seat, and the spring seat is guided to slide in the axial direction of the oil pressing spring.

44. The pump head assembly of claim 43, wherein, The guide is a guide cylinder, and the oil bag pressing disc or the spring seat is guided to slide with the cylinder wall of the guide cylinder.

45. The pump head assembly of any of claims 39-42, wherein, The support has a side loading and unloading opening on one side perpendicular to the moving direction of the oil bag pressing disc, for loading and unloading the oil bag.

46. The pump head assembly of claim 45, wherein, The support is provided with a limiting structure for limiting the oil bag in the circumferential direction, the limiting structure has an openable and closable opening, the opening constitutes the side loading and unloading opening, the oil bag can be loaded and unloaded when the opening is opened, and the oil bag is protected when the opening is closed.

47. The pump head assembly of claim 46, wherein, The support comprises at least two fixed columns, the fixed columns are fixed on the pump head, the fixed columns extend along the moving direction of the oil bag pressing disc, and the limiting structure comprises a first movable piece and a second movable piece which are hinged to the fixed columns, the two movable pieces are detachably connected to form the opening at the connection of the first movable piece and the second movable piece, and the first movable piece and the second movable piece are detached to open the opening for loading and unloading the oil bag.

48. The pump head assembly of any of claims 39-42, wherein, The support comprises a frame body and an oil pressing spring mounting seat arranged on the frame body, one end of the oil pressing spring is mounted on the oil pressing spring mounting seat, the frame body is provided with an end loading and unloading opening at the end in the axial direction of the oil pressing spring, the oil pressing spring mounting seat is arranged at the end loading and unloading opening, and the oil pressing spring mounting seat has an open state for opening the end loading and unloading opening and a closed state for closing the end loading and unloading opening.

49. The pump head assembly of claim 48, wherein, The oil pressing spring mounting seat comprises two symmetrical hinged parts which are hinged to the frame body through a hinged shaft and are detachable, so that the oil pressing spring mounting seat can be turned around the hinged shaft corresponding to one of the hinged parts when the oil pressing spring mounting seat is hinged to the frame body through the other hinged part, and the end loading and unloading opening is opened.

50. The pump head assembly of any of claims 39-42, wherein, The pump head is provided with an air exhaust structure for exhausting air in the pump head when oil is injected into the pump head.

51. The pump head assembly of claim 50, wherein, The air exhaust structure comprises an air exhaust pipe arranged at the top of the inner cavity of the pump head, the air exhaust pipe is provided with a plurality of air exhaust openings which are arranged at intervals along the length direction of the air exhaust pipe, an air exhaust joint which communicates the inner cavity of the pump head and the outside of the pump head is mounted on the shell of the pump head, and the air exhaust pipe communicates with the air exhaust joint.

52. The pump head assembly of any of claims 39-42, wherein, The spring winding and unwinding mechanism comprises a winding driving motor which drives the winding piece to rotate.

53. The pump head assembly of any of claims 39-42, wherein, The spring winding and unwinding mechanism comprises a crank handle which drives the winding piece to rotate, and a clutch structure is arranged between the winding piece and the crank handle to disconnect the power transmission path between the winding piece and the crank handle, or a one-way bearing is arranged between the winding piece and the crank handle to enable the crank handle to drive the winding piece to rotate in the forward direction.

54. The pump head assembly of any of claims 39-42, wherein, The spring winding and unwinding mechanism comprises a crank handle which drives the winding piece to rotate, and the crank handle comprises a connecting crank arm and an operating handle, the operating handle is hinged to the connecting crank arm to enable the operating handle to be folded and stored.

55. The pump head assembly of any of claims 39-42, wherein, The pump head assembly further comprises a control device and a low liquid level detection module, the low liquid level detection module is used for monitoring the liquid level of the oil bag and feeding back a signal to the control device when the liquid level in the oil bag is at a set minimum liquid level to control the lubricating pump to stop.

56. The pump head assembly of any of claims 39-42, wherein, The support comprises at least two fixed columns, the fixed columns are fixed on the pump head, the fixed columns extend along the moving direction of the oil bag pressing disc, and the oil bag pressing disc is guided to slide in the moving direction of the oil bag pressing disc.

57. The pump head assembly of claim 56, wherein, The outer periphery of the oil bag pressing disc is provided with a guide groove in sliding fit with each fixed column, and / or the oil bag pressing disc is provided with a guide hole through which the fixed column passes and in sliding fit with the fixed column.

58. The pump head assembly of claim 56, wherein, The support is provided with a protection cylinder for protecting the oil bag, and the fixed column is located in the protection cylinder.

59. The pump head assembly of claim 58, wherein, At least one pair of adjacent fixed columns forms a side loading opening for loading and unloading the oil bag, and the protection cylinder comprises a cylinder body and a protection door for opening or closing the side loading opening.

60. The pump head assembly of claim 59, wherein, The protection cylinder is injection molded, and the protection door is provided with a thinning portion at the connection with the cylinder body, and the protection door is deformed to open or close the side loading opening through the thinning portion.

61. The pump head assembly of claim 59, wherein, The protection door is hinged to the cylinder body.

62. The pump head assembly of claim 58, wherein, The fixed column and / or the protection cylinder is provided with an oil bag guide surface for guiding the oil bag in the axial direction and limiting the oil bag in the radial direction to prevent the oil bag from being skewed.

63. The pump head assembly of claim 62, wherein, The inner periphery of the protection cylinder forms the oil bag guide surface, and the protection cylinder is provided with an outwardly convex protection cylinder outwardly convex portion, and a fixed column avoiding groove is formed on the inner side of the protection cylinder outwardly convex portion and faces the protection cylinder, and the fixed column is located in the fixed column avoiding groove.

64. The pump head assembly of any of claims 58-63, wherein, The support is provided with a cover away from the top cover of the pump head, and the cover is sealingly closed to the protection cylinder in the moving direction of the oil bag pressing disc.

65. The pump head assembly of any of claims 58-61, wherein, The inner side of the protection cylinder is provided with a guide rib for guiding the oil bag to prevent the oil bag from being skewed.

66. The pump head assembly of any of claims 39-42, wherein, The rope is provided with a plurality of ropes, and three ropes are arranged in a triangular shape for synchronously acting on the oil bag pressing disc to maintain the posture of the oil bag pressing disc.

67. The pump head assembly of any of claims 39-42, wherein, The support is provided with a reversing pulley, and the rope is wound around the reversing pulley.

68. The pump head assembly of any of claims 39-42, wherein, The spring winding and unwinding mechanism comprises a winding unwinding drive motor for driving the rotation of the winding unwinding member, and the winding unwinding member is locked by the winding unwinding drive motor to prevent the oil pressing spring from being elongated.

69. The pump head assembly of claim 68, wherein, The winding unwinding drive motor is a speed reduction motor, and the winding unwinding drive motor comprises a speed reduction structure, and the winding unwinding member is locked by the resistance provided by the speed reduction structure after the winding unwinding drive motor is stopped. The speed reduction structure constitutes the locking structure.

70. The pump head assembly of claim 68, wherein, The winding unwinding member is a winding drum, and the winding unwinding drive motor is arranged in the winding drum.

71. The pump head assembly of any of claims 39-42, wherein, The support comprises an oil pressing spring mounting seat arranged on the top, the winding unwinding member is arranged on the side of the oil pressing spring mounting seat facing the pump head, and the winding unwinding member is located on the side of the oil pressing spring perpendicular to the moving direction of the oil bag pressing disc.

72. A grease pumping apparatus comprising a pump head assembly and a grease cartridge, the pump head assembly comprising a pump head and a support, the grease cartridge being removably disposed on the pump head, the grease cartridge having a grease outlet in communication with an internal cavity of the pump head, characterized in that, The pump head assembly is the pump head assembly of any one of claims 1-71.

73. The grease pumping apparatus of claim 72, wherein, An oil bag recess is arranged in the middle of the oil bag end, which is recessed towards the inside of the oil bag, and the oil bag recess is matched with the outwardly convex pressing surface of the pressing disc or the pressing surface of the pump head.

Images