Lubricating grease filling device with protection function

Abstract

The utility model discloses a lubricating grease filling device with a protection function. The lubricating grease filling device overcomes the defects of a lubricating grease filling device which adopts a safety valve to control lubricating grease injection pressure. The lubricating grease filling device with the protection function comprises a motor, a transmission mechanism and a filling pump, the motor drives the filling pump to operate to fill lubricating grease, and the transmission mechanism comprises a planetary gear set and a torque limiter. The planetary gear set comprises a sun gear in transmission with the motor, a planet gear meshed with the sun gear, a gear carrier bearing the planet gear and an inner gear ring meshed outside the planet gear. The torque limiter comprises a shell, a coupling piece and an elastic piece, the shell is fixed relative to the inner gear ring, the coupling piece is limited in the shell in the circumferential direction, the elastic piece is pre-tightened on the coupling piece in the direction facing the inner gear ring, the inner gear ring is coupled with the coupling piece under preset torque, and the inner gear ring is decoupled from the coupling piece under overload torque.

Description

Technical Field

[0001] The utility model relates to the field of grease filling devices, in particular to a grease filling device with a protection function. Background Art

[0002] When an operator uses a grease filling device to fill grease, they usually do not know whether the oil passage in the device being filled is unobstructed. This will lead to uncertain factors during the grease filling process, and the operator may not know whether the filled grease is overpressure. Once the grease is injected into the device under overpressure, it may cause damage to the pressure components and failure of the sealing components in the device; at the same time, excessive grease will instead cause a reduction in lubrication effect and an increase in the operating resistance of the device; secondly, it will also increase the working pressure of the grease pump, resulting in overloading of the grease pump and damage to the transmission mechanism, shortening the service life of the grease filling device; even more seriously, it may also lead to problems such as pipe bursting and high-pressure grease splashing, etc.

[0003] In the prior art, by adding a safety valve at the grease outlet position of the grease filling device, when the injected grease is overpressure, the safety valve relieves pressure to avoid the problem of overpressure of the injected grease. However, due to the basic structural principle of the safety valve, its pressure relief channel for relieving pressure and the pressure relief valve for controlling pressure will all be affected by factors such as the cleanliness of the grease, the fluidity of the grease, the viscosity of the grease, and the ambient temperature, which will affect the normal operation of the safety valve. When the grease filling device uses greases of different specifications and models and different product qualities and works in different seasons, it is necessary to frequently adjust and calibrate the pressure relief pressure of the safety valve, and the operation is very inconvenient. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and propose a grease filling device with a protection function to solve various drawbacks of the grease filling device that uses a safety valve to control the grease injection pressure.

[0005] In order to achieve the above technical objectives, the grease filling device with a protection function proposed by the utility model includes a motor, a transmission mechanism, and a filling pump. The motor drives the filling pump to operate through the transmission mechanism for filling grease. The transmission mechanism includes:

[0006] A planetary gear set, including a sun gear driven by the motor, a planetary gear meshing with the sun gear, a carrier for carrying the planetary gear, and an internal gear ring meshing with the outside of the planetary gear; and,

[0007] The torque limiter includes a housing fixed relative to the internal gear ring, a coupling member circumferentially limited within the housing, and an elastic member pre-tightened on the coupling member in the direction towards the internal gear ring;

[0008] Under a predetermined torque, the internal gear ring is rotationally restricted by the coupling member, and under an overload torque, the elastic member is compressed to release the coupling between the internal gear ring and the coupling member.

[0009] Preferably, the internal gear ring is convexly provided with ribs towards the coupling member. Under a predetermined torque, the coupling member abuts against the ribs to restrict the rotation of the internal gear ring. Under an overload torque, the elastic member is compressed to enable the ribs to slide relative to the coupling member, thereby releasing the coupling between the internal gear ring and the coupling member.

[0010] Preferably, the housing is provided with a sliding groove, the coupling member is a sliding body, and the coupling member is slidably fitted in the sliding groove;

[0011] There are a plurality of the sliding grooves, and the coupling member and the ribs are correspondingly provided with a plurality of;

[0012] The sliding grooves are circumferentially and uniformly distributed on the housing, and the ribs are arranged corresponding to the sliding grooves.

[0013] Preferably, the torque limiter further includes a partition plate disposed between the elastic member and the coupling member.

[0014] Preferably, a guiding structure is provided between the housing and the partition plate. The guiding structure includes axially cooperating guiding grooves and guiding blocks. The guiding grooves are provided on one of the housing and the partition plate, and the guiding blocks are provided on the other. The guiding grooves include a first guiding groove and a second guiding groove. The guiding blocks include a first guiding block corresponding to the first guiding groove and a second guiding block corresponding to the second guiding groove. The first guiding groove is provided on the outer side of the housing or the partition plate, and the second guiding groove is provided in the central region of the housing or the partition plate.

[0015] Preferably, a partition plate portion is provided on one side of the coupling member close to the elastic member, and the elastic member is pre-tightened on the partition plate portion.

[0016] Preferably, a limiting portion is provided on the housing, and the elastic member is pre-tightened between the limiting portion and the coupling member.

[0017] Preferably, the limiting portion is separately provided from the housing, and the limiting portion is detachably and fixedly connected to the housing and the relative position between the limiting portion and the housing is adjustable;

[0018] The housing is provided with a threaded portion, the limiting portion is screwed to the threaded portion, and the limiting portion is provided with an external tooth portion for rotating the limiting portion.

[0019] Preferably, the grease filling device further includes a housing, an oil injection gun, and a power supply device. The housing is provided with a cavity for accommodating grease, the housing is provided with an oil outlet nozzle communicating with the filling pump, the oil injection gun is installed on the oil outlet nozzle, and the power supply device is electrically connected to the motor.

[0020] The grease filling device with a protection function proposed by the present invention further includes a motor, a transmission mechanism, a filling pump, and a torque limiter. The motor drives the filling pump to operate for filling grease through the transmission mechanism. The torque limiter includes:

[0021] A torque input component that directly or indirectly receives torque;

[0022] A torque output component that directly or indirectly outputs torque; and an elastic component that applies a preload to the torque input component or the torque output component, so that the two maintain coupled transmission at a predetermined torque, and the two decouple at an overload torque.

[0023] The torque limiter is connected between the motor and the transmission mechanism, or between the transmission mechanism and the filling pump.

[0024] After adopting the above technical solutions, the present invention has the following beneficial effects.

[0025] 1. The grease filling device with a protection function proposed by the present invention includes a motor, a transmission mechanism, and a filling pump. The motor drives the filling pump to operate for filling grease through the transmission mechanism. The transmission mechanism includes:

[0026] A planetary gear set, including a sun gear driving the motor, a planetary gear meshing with the sun gear, a carrier supporting the planetary gear, and an internal gear ring meshing outside the planetary gear; and a torque limiter, including a housing fixed relative to the internal gear ring, a coupling member movably installed in the housing, and an elastic member preloading the coupling member in the direction towards the internal gear ring;

[0027] At a predetermined torque, the internal gear ring is coupled and restricted from rotating by the coupling member. At an overload torque, the elastic member is compressed to decouple the internal gear ring from the coupling member;

[0028] Since the pressure of the filling pump of the grease filling device is consistent with the pressure in the cavity that holds the grease in the equipment to be filled with grease, and as the pressure of the filling pump increases when filling out grease, the torque output by the transmission mechanism also gradually increases. According to the settings of the above solution, when the output torque is less than the predetermined threshold, the normal coupling of the transmission mechanism and the torque limiter enables the grease to be filled normally. When the output torque reaches the predetermined threshold, it means that the grease in the equipment to be filled with grease has reached the predetermined pressure. At this time, the decoupling of the transmission mechanism and the torque limiter causes the grease filling device to stop filling out grease, avoiding overpressure injection of grease into the equipment, thus avoiding problems such as reduced lubrication effect and increased operating resistance of the equipment caused by overpressure injection of grease. At the same time, since the torque limiter realizes coupling and decoupling under the action of torque, this means that whether the torque limiter is coupled is directly related to the injection pressure of the filling pump. In this way, greases of different specifications and models, product qualities, and different ambient temperatures do not affect the coupling and decoupling of the torque limiter. The grease filling device does not need to adjust and calibrate the upper limit of the filling pressure due to factors such as replacing different greases and different working environments, simplifying the operation difficulty of the operator.

[0029] 2. The internal gear ring protrudes with a rib towards the coupling part. Under a predetermined torque, the coupling part abuts against the rib to limit the rotation of the internal gear ring. Under an overload torque, the elastic part is compressed so that the rib slides relative to the coupling part to release the coupling between the internal gear ring and the coupling part. By protruding a rib on the side of the internal gear ring facing the coupling part, the coupling part restricts the rotation of the internal gear ring under a predetermined torque and slips relative to the internal gear ring under an overload torque to achieve the coupling and decoupling between the internal gear ring and the coupling part. With such a setting, under a predetermined torque, the coupling part can more stably restrict the rotation of the internal gear ring when coupling, so that the transmission mechanism can more stably output torque to the filling pump. Under an overload torque, the coupling part can more easily decouple from the internal gear ring, so that the transmission mechanism can better cut off the torque output to the filling pump and achieve precise torque control.

[0030] 3. The housing is provided with a chute, and the coupling part is a sliding body. The coupling part is slidably fitted in the chute. With such a setting, the friction during the movement of the coupling part is reduced, thus avoiding the influence of the coupling part on the torque. At the same time, the wear of the coupling part during use is also reduced, improving the service life of the torque limiter.

[0031] There are multiple slide grooves, and there are multiple coupling members and convex ribs correspondingly. This arrangement reduces the force between a single coupling member and a single convex rib, thereby reducing the friction and wear of the interaction between the two, thereby increasing the service life of the torque limiter; the slide grooves are evenly distributed on the shell in the circumferential direction, and the convex ribs are correspondingly arranged with the slide grooves. This arrangement makes the force between each coupling member and each convex rib more even, further increasing the service life of the torque limiter. At the same time, it also makes the torque limiter switch between coupling and decoupling more smoothly.

[0032] 4. The torque limiter also includes a partition, which is arranged between the elastic member and the coupling member. By setting the partition, the elastic member or the coupling member does not need to be restricted in size or shape in order to cooperate with each other, so that the elastic force of the elastic member can easily act on the coupling member, reducing the design and production costs of the torque limiter.

[0033] 5. A guide structure is provided between the shell and the partition, and the guide structure includes an axially matched guide groove and a guide block. The guide groove is provided on one of the shell and the partition, and the guide block is provided on the other. Since the partition is displaced accordingly by the coupling member, the guide structure guides the direction of displacement of the partition, thereby avoiding the deviation of the moving direction of the partition and affecting the operation of the torque limiter, thereby improving the stability of the torque limiter;

[0034] The guide groove includes a first guide groove and a second guide groove, and the guide block includes a first guide block arranged corresponding to the first guide groove and a second guide block arranged corresponding to the second guide groove. The first guide groove is arranged on the outside of the shell or the partition, and the second guide groove is arranged in the central area of the shell or the partition. When the torque limiter is working, the force between the inner ring and the coupling is large, and the force acts on the partition. The vibration of the motor or the shaking of the grease filling device will cause the partition to have a slight radial shaking, but this slight radial shaking will cause radial overlap or interference between the partition and the shell, which in turn makes the above-mentioned force act on the radial overlap or interference between the partition and the shell, thereby aggravating the wear between the partition and the shell. Through the above-mentioned arrangement, the partition and the shell are subject to multiple guiding effects, reducing or avoiding the possibility of slight radial shaking of the partition, thereby improving the service life of the partition and the shell, and then improving the service life of the torque limiter and the transmission mechanism.

[0035] 6. A partition part is integrally formed on one side of the coupling member close to the elastic member, and the elastic member is pre-tightened on the partition part. The contact area between the partition part and the elastic member is larger than that of the coupling member. By integrally forming the partition part on the coupling member, the area of the coupling member close to the elastic member is increased, and the adaptation between the elastic member and the coupling member is simpler, thereby reducing the design and production costs of the torque limiter.

[0036] 7. A limiting portion is provided on the housing, and the elastic member is pre-tensioned between the limiting portion and the coupling member. The limiting portion is separately provided from the housing, and the limiting portion is detachably and fixedly connected to the housing and the relative position between the limiting portion and the housing is adjustable. With such a setting, the preset value of the overload torque of the grease filling device can be adjusted by adjusting the relative position between the limiting portion and the housing, and then the grease filling device can be adapted to the requirements of different pressures of different devices and different grades and types of grease, further improving the versatility of the grease filling device. At the same time, with the use of the torque limiter, its wear will also cause a change in the value of its overload torque. Through the above setting, the overload torque can be adjusted to the required value, thereby improving the applicability of the grease filling device.

[0037] 8. A threaded portion is provided on the housing, and the limiting portion is screwed to the threaded portion. By screwing the limiting portion and the housing, the relative position between the limiting portion and the housing can be adjusted. This adjustable connection scheme is relatively mature and durable, which is beneficial to reducing the cost of the torque limiter; moreover, an external tooth portion for rotating the limiting portion is provided on the limiting portion. With such a setting, the operability of the limiting portion is further improved, facilitating the operation of the operator.

[0038] These features and advantages of the present utility model will be detailedly disclosed in the following specific embodiments and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the grease filling device in an embodiment of the present utility model;

[0040] Figure 2 It is a schematic diagram of the motor and the transmission mechanism in an embodiment of the present utility model;

[0041] Figure 3 It is a sectional view of the motor and the transmission mechanism in an embodiment of the present utility model;

[0042] Figure 4 It is an exploded view of the motor and the transmission mechanism in an embodiment of the present utility model;

[0043] Reference Numerals:

[0044] 100. Outer shell, 110. Oil outlet nozzle, 120. Grease gun;

[0045] 200. Motor;

[0046] 300. Transmission mechanism, 310. Planetary gear set, 311. Sun gear, 312. Planet gear, 313. Carrier, 314. Ring gear, 3141. Rib, 320. Torque limiter, 321. Housing, 3211. Slide groove, 3212. Limiting part, 3213. Threaded part, 322. Coupling member, 323. Elastic member, 324. Partition, 325. Guide groove, 3251. First guide groove, 3252. Second guide groove, 326. Guide block, 3261. First guide block, 3262. Second guide block;

[0047] 400. Filling pump;

[0048] 500. Power supply device. Detailed implementation manners

[0049] The technical solutions of the embodiments of the present invention will be explained and described below with reference to the accompanying drawings of the embodiments of the present invention. However, the following embodiments are only the preferred embodiments of the present invention and not all of them. Based on the embodiments in the implementation manners, other embodiments obtained by those skilled in the art without creative efforts all fall within the protection scope of the present invention.

[0050] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0051] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" and "several" is two or more, unless otherwise clearly defined.

[0052] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0053] Embodiment 1:

[0054] As Figures 1 to 4 shown, the grease filling device with a protection function proposed in the embodiment of the present utility model includes a housing 100, a motor 200, a transmission mechanism 300, a filling pump 400, an oil gun 120, and a power supply device 500. Among them, a cavity for accommodating grease is provided in the housing 100, an oil outlet nozzle 110 communicating with the filling pump 400 is provided on the housing 100, and the oil gun 120 is installed on the oil outlet nozzle 110. The motor 200, the transmission mechanism 300, and the filling pump 400 are arranged inside the housing 100. The power supply device 500 is electrically connected to the motor 200.

[0055] In this embodiment, the motor 200 drives the filling pump 400 to operate through the transmission mechanism 300 so as to fill grease. The transmission mechanism 300 includes a planetary gear set 310 and a torque limiter 320. The planetary gear set 310 includes a sun gear 311, planetary gears 312, a carrier 313, and an internal gear ring 314. The motor 200 is in transmission connection with the sun gear 311. The planetary gears 312 are in meshing transmission with the sun gear 311. The carrier 313 is used to carry the planetary gears 312. The internal gear ring 314 meshes outside the planetary gears 312. The torque limiter 320 includes a housing 321, a coupling member 322, and an elastic member 323. The housing 321 is fixed relative to the internal gear ring 314. The coupling member 322 is circumferentially limited inside the housing 321. The elastic member 323 is pre-tightened on the coupling member 322 in the direction towards the internal gear ring 314. Among them, the housing 321 is fixedly connected to the housing 100.

[0056] Under a predetermined torque, the internal gear ring 314 is coupled by the coupling member 322 to limit rotation. Under an overload torque, the elastic member 323 is compressed to release the coupling between the internal gear ring 314 and the coupling member 322.

[0057] Among them, coupling means that the internal gear ring 314 and the coupling member 322 can transmit torque through interaction. Due to the presence of the elastic member 323, when the acting force between the internal gear ring 314 and the coupling member 322 in the compression direction of the elastic member 323 is less than the elastic force of the elastic member 323, the two remain in a coupled state. When the acting force between the two in the compression direction of the elastic member 323 is greater than the elastic force of the elastic member 323, the coupling member 322 is pushed away from the coupling position by the internal gear ring 314, and thus the two are decoupled.

[0058] Since the pressure in the filling pump 400 of the grease filling device is the same as the pressure in the cavity that holds the grease in the device to be filled with grease, and as the pressure of the filling pump 400 for filling out grease increases, the torque output by the transmission mechanism 300 also gradually increases. According to the setting of the above solution, when the output torque is less than a predetermined threshold, the transmission mechanism 300 and the torque limiter 320 are coupled, so that the rotation of the internal gear ring 314 is restricted. At this time, the sun gear 311 meshes with the planet gear 312 and transmits torque downward through the wheel carrier 313 to make the filling pump 400 fill grease; when the output torque reaches the predetermined threshold, it means that the grease in the device to be filled with grease has reached the predetermined pressure. The acting force between the internal gear ring 314 and the coupling member 322 in the compression direction of the elastic member 323 is greater than the elastic force of the elastic member 323, so that the coupling member 322 is pushed away from the coupling position by the internal gear ring 314, and thus the two are decoupled, making the internal gear ring 314 rotatable. Since the transmission ratio output by the internal gear ring 314 is less than the transmission ratio output by the wheel carrier 313, at this time, the sun gear 311 meshes with the planet gear 312 and outputs torque through the internal gear ring 314, the wheel carrier 313 remains stationary, and the internal gear ring 314 rotates idly, so that the transmission mechanism 300 stops transmitting torque downward, and the grease filling device stops filling out grease outward, avoiding overpressure injection of grease into the device, and thus avoiding problems such as reduced lubrication effect and increased running resistance of the device caused by overpressure injection of grease; at the same time, since the torque limiter 320 realizes coupling and decoupling under the action of torque, this means that whether the torque limiter 320 is coupled is directly related to the injection pressure of the filling pump 400. In this way, there is no influence on the coupling and decoupling of the torque limiter 320 by greases of different specifications and models, product qualities, and different ambient temperatures. The grease filling device does not need to adjust and calibrate the upper limit of the filling pressure due to factors such as replacing different greases and different working environments, simplifying the operation difficulty of the operator.

[0059] Among them, the planetary gear set 310 is at least one - stage planetary gear set 310. The torque limiter 320 can be arranged on the first - stage planetary gear set 310 and cooperate with the first - stage internal gear ring 314 to realize transmission or cut off transmission. The torque limiter 320 can also be arranged on other - stage planetary gear sets 310 and cooperate with the internal gear rings 314 of other stages to realize transmission or cut off transmission.

[0060] In this embodiment, the elastic member 323 is a spring.

[0061] In some other embodiments, the elastic member 323 may also be other elastic components, such as elastic sheets, elastic material products, etc.

[0062] In this embodiment, the power supply device 500 is a battery.

[0063] In some other embodiments, the power supply device 500 may also be a power plug or a power plug plus a power adapter.

[0064] In this embodiment, one end of the elastic member 323 facing away from the coupling member 322 may abut against the housing 321.

[0065] In some other embodiments, one end of the elastic member 323 facing away from the coupling member 322 may abut against the motor 200 or may also abut against the outer housing 100.

[0066] Embodiment Two:

[0067] An explanation is given for the coupling of the internal gear ring 314 and the coupling member 322. As Figures 1 to 4 shown, in this embodiment, the internal gear ring 314 protrudes with a rib 3141 towards the coupling member 322. Under a predetermined torque, the coupling member 322 stops the rib 3141 in the rotation direction of the internal gear ring 314. Under an overload torque, the elastic member 323 is compressed so that the coupling member 322 slides relative to the rib 3141 to release the coupling between the internal gear ring 314 and the coupling member 322.

[0068] Specifically, under a predetermined torque, the internal gear ring 314 has a tendency to rotate under the meshing action of the planet gear 312. The coupling member 322 is pressed against the internal gear ring 314 by the pressure of the elastic member 323. The rib 3141 on the internal gear ring 314 is stopped by the coupling member 322 so that the internal gear ring 314 cannot rotate. At this time, the wheel carrier 313 rotates to output torque to the filling pump 400. As the torque gradually increases, the acting force between the rib 3141 on the internal gear ring 314 and the coupling member 322 causes the elastic member 323 to be gradually compressed, and a relative displacement occurs between the coupling member 322 and the rib 3141. Under an overload torque, the displacement of the coupling member 322 reaches a certain distance such that the coupling member 322 slides relative to the rib 3141, so that the internal gear ring 314 and the coupling member 322 are decoupled. At this time, the internal gear ring 314 starts to rotate under the meshing action of the planet gear 312, and the wheel carrier 313 remains stationary relative to the housing 321 and thus stops outputting torque to the filling pump 400.

[0069] In one embodiment, the coupling member 322 is a toothed ring that mates with the internal gear ring 314. The toothed ring can move axially relative to the housing 321 but cannot rotate circumferentially. The toothed ring is provided with teeth that project towards the rib 3141. The teeth stop in the rotational direction of the rib 3141 so that the coupling member 322 is coupled to the internal gear ring 314. When the compression elastic member 323 on the toothed ring disengages from the stop position, the rib 3141 slides relative to the teeth, and the coupling member 322 is decoupled from the internal gear ring 314.

[0070] In another embodiment, the coupling member 322 is a toothed block that mates with the internal gear ring 314. The toothed block can move radially relative to the housing 321 but cannot rotate circumferentially. The toothed block stops in the rotational direction of the rib 3141 so that the coupling member 322 is coupled to the internal gear ring 314. When the toothed block compresses the elastic member 323 and disengages from the stop position, the rib 3141 slides relative to the toothed block, and the coupling member 322 is decoupled from the internal gear ring 314.

[0071] In some other embodiments, the toothed block can also move in an inclined direction but cannot rotate circumferentially.

[0072] By projecting the rib 3141 on the side of the internal gear ring 314 facing the coupling member 322, the coupling member 322 restricts the rotation of the internal gear ring 314 at a predetermined torque and slips relative to the internal gear ring 314 at an overload torque, so as to realize the coupling and decoupling between the internal gear ring 314 and the coupling member 322. With such a setting, at the predetermined torque, the coupling member 322 can more stably restrict the rotation of the internal gear ring 314 during coupling, so that the transmission mechanism 300 can more stably output torque to the filling pump 400; at the overload torque, the coupling member 322 can more easily decouple from the internal gear ring 314, so that the transmission mechanism 300 can better cut off the torque output to the filling pump 400 and achieve precise torque control.

[0073] Embodiment Three:

[0074] Based on Embodiment Two, as Figures 1 to 4 shown, in this embodiment, the housing 321 is provided with a chute 3211, and the coupling member 322 is a sliding body that is slidably fitted in the chute 3211.

[0075] With such a setting, the friction during the movement of the coupling member 322 is reduced, thereby avoiding the influence of the frictional force of the coupling member 322 on the torque. At the same time, the wear of the coupling member 322 during use is also reduced, and the service life of the torque limiter 320 is improved.

[0076] In this embodiment, the coupling member 322 can be a ball or a slidable cylinder. Preferably, the coupling member 322 is a ball, and one or more balls in the chute 3211 can be provided according to the length of the chute 3211.

[0077] Preferably, in this embodiment, there are multiple sliding grooves 3211, and correspondingly, there are multiple coupling members 322 and multiple convex ribs 3141.

[0078] With such a setting, the force between a single coupling member 322 and a single convex rib 3141 is reduced, thereby reducing the friction and wear between the two during their interaction, and thus increasing the service life of the torque limiter 320.

[0079] More preferably, in this embodiment, the sliding grooves 3211 are circumferentially and uniformly distributed on the housing 321, and the convex ribs 3141 are arranged corresponding to the sliding grooves 3211.

[0080] With such a setting, the force between each coupling member 322 and each convex rib 3141 is more evenly distributed, further increasing the service life of the torque limiter 320. At the same time, it also makes the switching between coupling and decoupling of the torque limiter 320 smoother.

[0081] It can be understood that the setting direction of the sliding grooves 3211 can be axial, radial, or an inclined direction between the axial and radial directions.

[0082] Embodiment 4:

[0083] Based on Embodiment 3, as Figures 1 to 4 shown, in this embodiment, the torque limiter 320 further includes a partition plate 324, and the partition plate 324 is arranged between the elastic member 323 and the coupling member 322.

[0084] Combined with Figure 4 , in this embodiment, the partition plate 324 is annular and sleeved on the housing 321. The elastic member 323 is arranged outside the housing 321. One end of the partition plate 324 faces the sliding groove 3211, and the other end faces the elastic member 323. In the coupled state, a part of the coupling member 322 extends out of the sliding groove 3211 and abuts against the partition plate 324. In the decoupled state, the coupling member 322 further extends out of the sliding groove 3211 to push the partition plate 324 towards the elastic member 323, thereby compressing the elastic member 323.

[0085] In some other embodiments, the partition plate 324 may also be provided with a protrusion, and the protrusion can at least partially extend into the sliding groove 3211 to abut against the coupling member 322.

[0086] By providing the partition plate 324, there is no need to limit the size and shape of the elastic member 323 or the coupling member 322 for cooperation with each other, so that the elastic force of the elastic member 323 can easily act on the coupling member 322, reducing the design and production costs of the torque limiter 320.

[0087] Embodiment 5:

[0088] Based on Embodiment 4, asFigures 1 to 4 As shown, in this embodiment, a guiding structure is provided between the housing 321 and the partition 324. The guiding structure includes axially cooperating guiding grooves 325 and guiding blocks 326. The guiding grooves 325 are provided on the partition 324, and the guiding blocks 326 are provided on the housing 321.

[0089] In some other embodiments, the guiding grooves 325 are provided on the housing 321, and the guiding blocks 326 are provided on the partition 324.

[0090] Since the partition 324 is displaced correspondingly under the action of the coupling member 322, the guiding structure guides the displacement direction of the partition 324, thereby avoiding the deviation of the moving direction of the partition 324 and affecting the operation of the torque limiter 320, thus improving the working stability of the torque limiter 320.

[0091] Preferably in this embodiment, the guiding groove 325 includes a first guiding groove 3251 and a second guiding groove 3252. The guiding block 326 includes a first guiding block 3261 corresponding to the first guiding groove 3251 and a second guiding block 3262 corresponding to the second guiding groove 3252. The first guiding groove 3251 is provided on the outer side of the housing 321 or the partition 324, and the second guiding groove 3252 is provided in the central region of the housing 321 or the partition 324.

[0092] When the torque limiter 320 is working, the acting force between the internal gear ring 314 and the coupling member 322 is relatively large, and this acting force acts on the partition 324. The vibration of the motor 200 or the shaking of the grease filling device will cause slight radial shaking of the partition 324. However, this slight radial shaking will cause radial overlap or interference between the partition 324 and the housing 321, and this will make the above-mentioned acting force act on the radial overlap or interference between the partition 324 and the housing 321, thereby aggravating the wear between the partition 324 and the housing 321. Through the above settings, the partition 324 and the housing 321 are subjected to multiple guiding effects, reducing or avoiding the possibility of slight radial shaking of the partition 324, thereby improving the service life of the partition 324 and the housing 321, and further improving the service life of the torque limiter 320 and the transmission mechanism 300.

[0093] Embodiment Six:

[0094] Based on Embodiment Three, as Figures 1 to 4 shown, in this embodiment, a partition portion is integrally formed on one side of the coupling member 322 close to the elastic member 323. The elastic member 323 is pre-tightened on the partition portion, and the contact area between the partition portion and the elastic member 323 is larger than that of the coupling member 322.

[0095] By integrally forming a partition portion on the coupling member 322, the area of the coupling member 322 on the side close to the elastic member 323 is increased, and the adaptation between the elastic member 323 and the coupling member 322 becomes simpler, thereby reducing the design and production costs of the torque limiter 320.

[0096] Embodiment Seven:

[0097] Based on Embodiments One to Six, as Figures 1 to 4 shown, in this embodiment, a limiting portion 3212 is provided on the housing 321, and the elastic member 323 is pre-tightened between the limiting portion 3212 and the coupling member 322.

[0098] Among them, the limiting portion 3212 can be the shell wall of the housing 321 or a limiting plate formed on the housing 321.

[0099] In this embodiment, one end of the elastic member 323 abuts against the limiting portion 3212, and the other end abuts against the partition plate 324.

[0100] In some other embodiments, one end of the elastic member 323 abuts against the limiting portion 3212, and the other end abuts against the coupling member 322.

[0101] Preferably in this embodiment, the limiting portion 3212 is separately provided from the housing 321, the limiting portion 3212 is detachably and fixedly connected to the housing 321, and the relative position between the limiting portion 3212 and the housing 321 is adjustable.

[0102] With such a setting, the preset value of the overload torque of the grease filling device can be adjusted by adjusting the relative position between the limiting portion 3212 and the housing 321. Furthermore, the grease filling device can be adapted to the requirements of different pressures and different grades and types of grease for different devices, further improving the versatility of the grease filling device. At the same time, as the torque limiter 320 is used, its wear will also cause the value of its overload torque to change. Through the above setting, the overload torque can be adjusted to the required value, thereby enhancing the applicability of the grease filling device.

[0103] In a preferred embodiment, a threaded portion 3213 is provided on the housing 321, and the limiting portion 3212 is screwed to the threaded portion 3213.

[0104] By screwing the limiting portion 3212 and the housing 321, the relative position between the limiting portion 3212 and the housing 321 can be adjusted. This adjustable connection scheme is relatively mature, strong and durable, which is beneficial to reducing the cost of the torque limiter 320.

[0105] More preferably in this embodiment, an external tooth portion for operating and rotating the limiting portion 3212 is provided on the limiting portion 3212.

[0106] With such a setting, the operability of the limiting part 3212 is further improved, facilitating the operation by the operator.

[0107] In another preferred embodiment, a plurality of clamping grooves are provided on the housing 321, and a clamping buckle is provided on the limiting part 3212. The clamping buckle is clamped on different clamping grooves, so that the relative position of the limiting part 3212 and the housing 321 can be adjusted.

[0108] Embodiment Eight:

[0109] The grease filling device with a protection function proposed in the embodiment of the present utility model includes a housing 100, a motor 200, a transmission mechanism 300, a filling pump 400, an oil gun 120 and a power supply device 500. Among them, a cavity for accommodating grease is provided in the housing 100, an oil outlet nozzle 110 communicating with the filling pump 400 is provided on the housing 100, and the oil gun 120 is installed on the oil outlet nozzle 110. The motor 200, the transmission mechanism 300 and the filling pump 400 are arranged in the housing 100. The power supply device 500 is electrically connected to the motor 200.

[0110] In this embodiment, the motor 200 drives the filling pump 400 to operate through the transmission mechanism 300, so as to fill the grease. Among them, a torque limiter is connected between the motor 200 and the transmission mechanism 300, or between the transmission mechanism 300 and the filling pump 400. The torque limiter transmits at a predetermined torque and cuts off the transmission at an overload torque.

[0111] In some embodiments, the torque limiter may refer to the torque limiter 320 in Embodiments One to Seven.

[0112] In some other embodiments, the torque limiter may also be a safety coupling, which includes a torque input component, a torque output component and an elastic component. The torque input component directly or indirectly receives torque, the torque output component directly or indirectly outputs torque, and the elastic component applies a preload to the torque input component or the torque output component, so that the two maintain coupled transmission at a predetermined torque and decouple at an overload torque.

[0113] As described above, the above are only the specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Those skilled in the art should understand that the present utility model includes but is not limited to the content described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present utility model will be included in the scope of the claims.

Claims

1. A grease filling device with a protection function, comprising a motor, a transmission mechanism and a filling pump, wherein the motor drives the filling pump to operate through the transmission mechanism for filling grease, and is characterized in that, The transmission mechanism includes: A planetary gear set, including a sun gear driven by the motor, planet gears meshing with the sun gear, a carrier for carrying the planet gears, and an internal gear ring meshing with the outside of the planet gears; and, A torque limiter, including a housing fixed relative to the internal gear ring, a coupling member circumferentially limited within the housing, and an elastic member pre-tightened on the coupling member in the direction towards the internal gear ring; At a predetermined torque, the internal gear ring is rotationally restricted by being coupled by the coupling member, and at an overload torque, the elastic member is compressed to release the coupling between the internal gear ring and the coupling member.

2. The grease filling device with a protection function according to claim 1, characterized in that, The internal gear ring protrudes with ribs towards the coupling member. At a predetermined torque, the coupling member abuts against the ribs to restrict the rotation of the internal gear ring. At an overload torque, the elastic member is compressed to enable the ribs to slide relative to the coupling member, thereby releasing the coupling between the internal gear ring and the coupling member.

3. The grease filling device with a protection function according to claim 2, characterized in that, A chute is provided on the housing, the coupling member is a sliding body, and the coupling member is slidably fitted in the chute; A plurality of the chutes are provided, and a plurality of the coupling members and the ribs are correspondingly provided; The chutes are circumferentially and uniformly distributed on the housing, and the ribs are arranged corresponding to the chutes.

4. The grease filling device with a protection function according to claim 3, characterized in that, The torque limiter further includes a partition plate provided between the elastic member and the coupling member.

5. The grease filling device with a protection function according to claim 4, characterized in that, A guiding structure is provided between the housing and the partition plate. The guiding structure includes axially cooperating guiding grooves and guiding blocks. The guiding grooves are provided on one of the housing and the partition plate, and the guiding blocks are provided on the other. The guiding grooves include a first guiding groove and a second guiding groove. The guiding blocks include a first guiding block corresponding to the first guiding groove and a second guiding block corresponding to the second guiding groove. The first guiding groove is provided on the outside of the housing or the partition plate, and the second guiding groove is provided in the central region of the housing or the partition plate.

6. The grease filling device with a protection function according to claim 3, characterized in that, A partition plate portion is provided on the side of the coupling member close to the elastic member, and the elastic member is pre-tightened on the partition plate portion. The contact area between the partition plate portion and the elastic member is larger than that of the coupling member.

7. The grease filling device with a protection function according to claim 1, characterized in that, A limiting portion is provided on the housing, and the elastic member is pre-tightened between the limiting portion and the coupling member.

8. The grease filling device with a protection function according to claim 7, characterized in that, The limiting portion is separately provided from the housing, and the limiting portion is detachably and fixedly connected to the housing and the relative position between the limiting portion and the housing is adjustable; Characterized in that a threaded portion is provided on the housing, the limiting portion is screwed to the threaded portion, and an external tooth portion for rotating the limiting portion is provided on the limiting portion.

9. The grease filling device with a protection function according to claim 1, wherein, It further includes an outer shell, an oil gun, and a power supply device. A cavity for containing lubricating grease is provided in the outer shell. An oil outlet nozzle communicating with the filling pump is provided on the outer shell. The oil gun is installed on the oil outlet nozzle, and the power supply device is electrically connected to the motor.

10. A grease filling device with a protection function, comprising a motor, a transmission mechanism, a filling pump and a torque limiter. The motor drives the filling pump to operate through the transmission mechanism for grease filling, and is characterized in that, The torque limiter includes: A torque input component that directly or indirectly receives torque; A torque output component that directly or indirectly outputs torque; and, An elastic component that applies pre-tightening to the torque input component or the torque output component, so that the two maintain coupled transmission at a predetermined torque and release the coupled transmission at an overload torque, The torque limiter is connected between the motor and the transmission mechanism, or is connected between the transmission mechanism and the filling pump.

Images