Grease pumping device of grease gun

Abstract

The utility model belongs to the technical field of grease guns, and particularly relates to a grease pumping device of a grease gun, which comprises a mounting sleeve capable of being arranged in a grease gun barrel, a piston piece slidably arranged in the mounting sleeve and a fixing component used for fixing the mounting sleeve in the grease gun barrel. The piston piece comprises a piston rod arranged in the mounting sleeve and a piston arranged on the piston rod, the piston can be attached to the inner wall of the grease gun barrel, a threaded rod is rotationally arranged in the mounting sleeve, a threaded hole matched with the threaded rod is formed in the piston rod, the threaded rod penetrates through the threaded hole, and a driving end is arranged at the rear end of the threaded rod; the driving end is controlled to rotate to drive the piston rod and the piston to move back and forth along the threaded rod through the threaded rod, the grease pumping device is simple in structure, grease is pumped into the grease gun barrel through a screw transmission structure, and therefore the efficient and labor-saving effects are achieved. And some users with small arm strength can finish the grease pumping work of the grease gun barrel at one time, so that the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of butter gun, especially point to a kind of butter gun's oil pumping device. BACKGROUND

[0002] Butter gun is a kind of hand tool for filling lubricating wax to equipment, with simple operation, convenient to carry, many advantages such as wide use range, is the tool of mass equipment maintenance personnel, butter gun includes manual butter gun, pneumatic butter gun, electric butter gun, and the butter gun on the market at present all through the oil pumping device on gun barrel when filling butter, and oil pumping device is by piston, iron chain and pull ring, user extracts butter by all need first the front end of gun barrel is inserted into butter, then pull ring is pulled to drive iron chain to move, finally iron chain will drive piston to move back to pump butter into gun barrel, but because piston moves back in the process of overcoming spring force to make spring enter compression state, and the front end of gun barrel is inserted into butter, there is certain barometric pressure difference between gun barrel and outside at this time, user needs to overcome barometric pressure difference when pulling ring is pulled to move back piston, to cause user to need to spend great effort to pull ring to move, finally complete the oil pumping work of butter gun, and because spring compression is shorter, user needs to overcome spring force is greater, when piston moves to the back, user needs to spend double effort to overcome spring force, and some young people with small arm strength, even cannot complete the oil pumping work of butter gun barrel at one time, affect work efficiency. SUMMARY

[0003] The utility model aims at providing a kind of simple structure, adopt screw rod transmission structure and pump butter into the oil pumping device of butter gun barrel, to reach the effect of high efficiency and labor saving, and some user with small arm strength can also complete the oil pumping work of butter gun barrel at one time, to improve work efficiency.

[0004] The utility model aims at providing a kind of simple structure, adopt screw rod transmission structure and pump butter into the oil pumping device of butter gun barrel, to reach the effect of high efficiency and labor saving, and some user with small arm strength can also complete the oil pumping work of butter gun barrel at one time, to improve work efficiency.

[0005] A kind of oil pumping device of butter gun, including the installation sleeve that can be set in butter gun barrel, the piston piece that is slidably arranged in installation sleeve and the fixing assembly for fixing installation sleeve in butter gun barrel, the piston piece includes the piston rod arranged in installation sleeve and the piston arranged on piston rod, the piston can be attached to the inner wall of butter gun barrel, screw rod is rotationally arranged in installation sleeve, and threaded hole is arranged on piston rod, the screw rod is arranged in threaded hole, the rear end of screw rod is provided with driving end, and the driving end is rotated to drive piston rod and piston to move back and forth along screw rod by screw rod.

[0006] Further, the piston rod comprises a threaded sleeve, the threaded hole is arranged on the threaded sleeve, the threaded rod is provided with an idle part with a smooth plane outer wall, the idle part is located in front of the driving end, and driving the threaded rod to rotate can drive the threaded sleeve and the piston rod to move forward and backward along the threaded rod; when the piston rod moves backward to the maximum distance, the threaded sleeve enters the idle part, and at this time, the threaded rod and the threaded sleeve are in a clutching state.

[0007] Further, the piston rod comprises a threaded sleeve, the threaded hole is arranged on the threaded sleeve, the threaded rod is provided with an idle part with a smooth plane outer wall, the idle part is located in front of the driving end, and driving the threaded rod to rotate can drive the threaded sleeve and the piston rod to move forward and backward along the threaded rod; when the piston rod moves backward to the maximum distance, the threaded sleeve enters the idle part, and at this time, the threaded rod and the threaded sleeve are in a clutching state.

[0008] Further, the driving end is provided with a ratchet wheel, the mounting sleeve is rotatably connected with a poking rod, the front end of the poking rod is provided with a pawl which is clamped with the ratchet wheel, and the pawl can be clamped with the ratchet wheel so that the threaded rod can only rotate in one direction.

[0009] Further, the rear end of the mounting sleeve is provided with an extension ring, the driving end passes through the mounting sleeve and is located in the extension ring, the poking rod and the ratchet wheel on the driving end are located in the extension ring, the extension ring is provided with a sliding groove, the rear end of the poking rod passes through the sliding groove and is exposed outside the extension ring, the poking rod is provided with a mounting part, the mounting part is provided with a mounting column, the mounting column is sleeved with a torsion spring, the two ends of the torsion spring are respectively provided with a first antenna and a second antenna, the first antenna is located in the extension ring and abuts against the inner wall of the extension ring, the poking rod is provided with a mounting hole, and one end of the second antenna is located in the mounting hole.

[0010] Further, the fixing assembly comprises a fixing cover connected with the extension ring, a connecting cover sleeved on the extension ring and an abutting ring, the abutting ring is located between the connecting cover and the fixing cover, and the abutting ring is provided with a corresponding notch corresponding to the sliding groove, the rear end of the driving rod is exposed outside the extension ring through the sliding groove and the notch, the top end of the fixing cover is provided with a through hole for the driving end to pass through, the inner wall of the connecting cover is provided with threads, the connecting cover can be screwed with the grease gun barrel through the threads of the inner wall, the extension ring is provided with external threads, the inner wall of the fixing cover is provided with internal threads matched with the external threads, and the fixing cover is screwed to the extension ring, and the fixing cover abuts against the abutting ring at this time.

[0011] Further, the inner wall of the mounting sleeve is provided with a rotation stopping protrusion, the outer wall of the piston rod is provided with a first rotation stopping groove, the rotation stopping protrusion is located in the first rotation stopping groove and abuts against the piston rod, so that the rotation of the piston rod relative to the mounting sleeve is limited.

[0012] Further, the piston is provided with a connecting portion, the connecting portion is provided with a connecting hole, the front end of the shrinkable rope is arranged in the connecting hole and fixedly connected with the connecting portion, the front end of the mounting sleeve is provided with a fixing hole, and the rear end of the shrinkable rope passes through the driving hole and is located in the fixing hole and fixedly connected with the front end of the mounting sleeve.

[0013] Further, the inner wall of the first piston rod is provided with a second rotation stopping groove, and the outer wall of the second piston rod is provided with a rotation stopping block arranged in the second rotation stopping groove and clamped with the first piston rod.

[0014] Further, the driving end is provided with a driving device, the driving device comprises a control handle fixedly connected with the driving end, and the top of the driving end is provided with a polygonal rotation groove matched with a working head of an electric wrench or a hand electric drill.

[0015] The utility model discloses have the following beneficial effects compared with prior art:

[0016] The utility model belongs to butter gun technical field, especially point to a kind of butter gun's oil pumping device, including the installation sleeve that can be set in butter gun barrel, the piston piece that is slidably arranged in installation sleeve and the fixing assembly for fixing installation sleeve in butter gun barrel, installation sleeve can be fixedly installed to butter gun barrel by fixing assembly, and piston piece is made of piston rod and piston, piston rod is arranged in installation sleeve, and when oil pumping device is installed to butter gun barrel, piston on piston rod will be attached to the inner wall of butter gun barrel at this time, so when piston rod moves back in installation sleeve, butter can be smoothly pumped into butter gun barrel, and threaded rod rotationally arranged in installation sleeve is threaded into the threaded hole of piston rod, user can rotate counterclockwise by hand Drive end or connect auxiliary device for assisting drive end rotation on drive end, when drive end rotates counterclockwise, threaded rod will rotate counterclockwise synchronously with drive end, and piston rod threaded with threaded rod will move back along threaded rod at this time, the piston on piston rod will also move back along threaded rod, so butter is pumped into butter gun barrel, compared with butter gun on market, when filling butter, all need to be moved by pulling ring to drive iron chain, finally iron chain will drive piston to move back and pump butter into gun barrel, but because spring force and pressure difference need to be overcome in the process of piston moving back to drive piston to move back, user needs to spend great effort to complete the oil pumping work of butter gun, and because spring compression is shorter, user needs to overcome the spring force is greater, when piston moves to the back, user needs to spend double effort to overcome spring force, and some young people with small arm strength, even cannot complete the oil pumping work of butter gun barrel at one time, affect work efficiency, the utility model adopts the threaded rod in installation sleeve is threaded with piston rod through the threaded hole on piston rod, piston rod and piston are driven to move back synchronously by threaded rod rotation, so that butter is smoothly pumped into butter gun barrel, this screw rod transmission structure is widely used in mechanical industry, conveying system and other industrial applications, which can achieve high-efficiency labor-saving effect, so compared with old oil pumping device on market, the utility model can greatly save the effort spent by user when pumping oil, and some users with small arm strength can also complete the oil pumping work of butter gun barrel at one time, so as to improve work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the perspective view of the utility model.

[0018] Figure 2 It is the sectional view of the utility model.

[0019] Figure 3 It is Figure 2 The local enlarged view of A in Fig.

[0020] Figure 4 It is the explosion view of installation sleeve and piston piece of the utility model.

[0021] Figure 5 Is the explosion drawing of the installation sleeve, the fixing cover and the control handle.

[0022] Figure 6 Is the sectional view of the threaded rod installed in the installation sleeve.

[0023] Figure 7 Is the explosion drawing of the abutting ring and the extension ring.

[0024] Figure 8 Is the structural schematic view of the pawl and the ratchet wheel being clamped.

[0025] Figure 9 Is the structural schematic view of the pawl and the ratchet wheel not being clamped.

[0026] Figure 10 Is the explosion drawing of the first piston rod, the second piston rod and the contraction rope.

[0027] Figure 11 Is the perspective view of the first piston rod.

[0028] Figure 12 Is the structural schematic view of the utility model.

[0029] Figure 13 Is Figure 12 The local enlarged view at D in the middle.

[0030] Figure 14 Is the explosion drawing of the installation sleeve and the first piston rod and the second piston rod.

[0031] Figure 15 Is the structural schematic view of the installation sleeve and the threaded rod.

[0032] Figure 16 Is the sectional view of the installation sleeve, the first piston rod and the threaded rod.

[0033] Figure 17 Is the structural schematic view of the pushing rod and the torsion spring.

[0034] Figure 18 Is the perspective view of the threaded rod.

[0035] The meaning represented by the label in the figure:

[0036] 1-Installation sleeve; 2-Piston piece; 3-Piston rod; 4-Piston; 7-Threading rod; 8-Drive end;

[0037] 9-Control handle; 10-Polygon rotation groove; 12-Threading sleeve; 13-Threading hole;

[0038] 14-idler; 15-first rotation-stop groove; 16-rotation-stop protrusion; 17-first piston rod;

[0039] 18-second piston rod; 19-connection cover; 20-oil pushing spring; 21-retraction rope; 22-driving table;

[0040] 23-driving hole; 24-connection part; 25-connection hole; 26-fixing hole; 27-second rotation-stop groove;

[0041] 28-rotation-stop block; 29-elongated ring; 30-fixing cover; 31-external thread; 32-internal thread;

[0042] 33-perforation; 34-ratchet wheel; 35-pushing rod; 36-pawl; 37-sliding channel;

[0043] 38-abutment ring; 39-gap; 40-mounting part; 41-mounting column; 42-torsion spring;

[0044] 43-first feeler; 44-second feeler; 45-mounting hole. DETAILED DESCRIPTION

[0045] The utility model will be further described in connection with specific embodiments as follows:

[0046] The utility model belongs to butter gun technical field, especially point to a kind of butter gun's oil pumping device, including the installation sleeve 1 that can be set in butter gun barrel, piston piece 2 slidingly set in installation sleeve 1 and the fixing assembly for fixing installation sleeve 1 in butter gun barrel, installation sleeve 1 can be fixedly installed to butter gun barrel by fixing assembly, and piston piece 2 is made of piston rod 3 and piston 4, piston rod 3 is set in installation sleeve 1, and when oil pumping device is installed to butter gun barrel, piston 4 on piston rod 3 will be in conformity with the inner wall of butter gun barrel at this time, so when piston rod 3 moves back in installation sleeve 1, butter can be smoothly pumped into butter gun barrel, and threaded rod 7 rotationally arranged in installation sleeve 1 is arranged in the threaded hole 13 of piston rod 3, user can rotate driving end 8 counterclockwise manually or connect the auxiliary device for assisting the rotation of driving end 8 on driving end 8, when driving end 8 counterclockwise rotates, threaded rod 7 will synchronously counterclockwise rotate with driving end 8, and piston rod 3 connected with threaded rod 7 by screw thread will move back along threaded rod 7, and piston 4 on piston rod 3 will also move back along threaded rod 7, to pump butter into butter gun barrel, compared with the butter gun on market, when filling butter, all need to be moved by pulling ring to drive iron chain, finally iron chain will drive piston 4 to move back and pump butter into gun barrel, but because piston 4 needs to overcome spring force and pressure difference to drive piston 4 to move back in the process of moving back, user needs to spend great effort to complete the oil pumping work of butter gun, and because spring compression is shorter, user needs to overcome the spring force is greater, when piston 4 moves to the back, user needs to spend double effort to overcome spring force, and some young people with small arm strength, even cannot complete the oil pumping work of butter gun barrel at one time, affect work efficiency, the utility model adopts the threaded rod 7 in installation sleeve 1 by threaded hole 13 on piston rod 3 and piston rod 3 screw connection, by the rotation of threaded rod 7 to drive piston rod 3 and piston 4 synchronous back movement, to smoothly pump butter into butter gun barrel, this screw rod transmission structure is widely used in mechanical industry, conveying system and other industrial applications, it can reach high-efficiency labor-saving effect, so compared with the old oil pumping device on market, the utility model can greatly save the effort spent by user when pumping oil, and some users with small arm strength can also complete the oil pumping work of butter gun barrel at one time, to improve work efficiency.

[0047] Preferably, the piston rod 3 comprises a threaded sleeve 12, the threaded hole 13 is arranged on the threaded sleeve 12, the threaded rod 7 is provided with an idling part 14 with smooth plane outer wall, the idling part 14 is located in front of the driving end 8, driving the threaded rod 7 to rotate can drive the threaded sleeve 12 and the piston rod 3 to move forward and backward along the threaded rod 7, when the piston rod 3 moves backward to the maximum distance, the threaded sleeve 12 enters the idling part 14, at this time the threaded rod 7 and the threaded sleeve 12 are in the clutch state; the threaded hole 13 is arranged on the threaded sleeve 12 of the piston rod 3, when the user drives the threaded rod 7 to rotate counterclockwise through the driving end 8, at this time the piston rod 3 and the threaded sleeve 12 will move backward along the threaded rod 7, when the piston rod 3 moves inward to the maximum distance, the threaded sleeve 12 on the piston rod 3 will enter the idling part 14 of the threaded rod 7, because the outer wall of the idling part 14 is smooth and flat, at this time even if the user continues to drive the threaded rod 7 to rotate, the threaded rod 7 and the threaded sleeve 12 are in the clutch state, when the user controls the threaded rod 7 to rotate by using the electric drill or the electric wrench, the number of rotations of the threaded rod 7 cannot be well controlled, thereby causing the distance that the piston rod 3 moves backward along the threaded rod 7 to exceed the length of the mounting sleeve 1, the mounting sleeve 1 is torn, and the idling part 14 on the threaded rod 7 can well avoid the piston rod 3 tearing the mounting sleeve 1.

[0048] Preferably, the piston rod 3 comprises a first piston rod 17 and a second piston rod 18 sleeved with each other, the threaded hole 13 is arranged on the first piston rod 17, the threaded rod 7 is arranged in the threaded hole 13 and is threadedly connected with the first piston rod 17, the second piston rod 18 is slidable relative to the first piston rod 17, the piston 4 is arranged on the second piston rod 18, the oil pushing spring 20 is arranged between the mounting sleeve 1 and the piston 4, the contraction rope 21 is connected between the mounting sleeve 1 and the piston 4, the rear end of the first piston rod 17 is provided with a driving table 22, the driving hole 23 is arranged on the driving table 22 and the rear end of the contraction rope 21 passes through the driving hole 23, the front end of the contraction rope 21 is connected with the piston 4, the rear end of the contraction rope 21 passes through the driving hole 23 and is connected with the front end of the mounting sleeve 1, the threaded rod 7 is driven to rotate, the first piston rod 17 and the driving table 22 are controlled to move rearward along the threaded rod 7, the driving table 22 moves rearward and drives the middle part of the contraction rope 21 to move rearward, at this time, the contraction rope 21 drives the second piston rod 18 to move rearward along the first piston rod 17, so that the first piston rod 17 is retracted into the second piston rod 18.Since the rear end of the contraction rope 21 is connected with the front end of the mounting sleeve 1 through the driving hole 23 on the driving table 22, and the driving table 22 is arranged at the rear end of the first piston rod 17, when the user controls the threaded rod 7 to rotate, at this time, the first piston rod 17 will move backward along the threaded rod 7, so that the first piston rod 17 slowly enters into the mounting sleeve 1, and the driving table 22 on the first piston rod 17 also moves backward along the threaded rod 7, the backward movement of the driving table 22 drives the middle part of the contraction rope 21 to move backward, so that the contraction rope 21 drives the second piston rod 18 to slowly enter into the first piston rod 17, thereby the first piston rod 17 and the second piston rod 18 move backward synchronously, when the driving table 22 reaches the bottom end in the mounting sleeve 1, the first piston rod 17 is retracted into the mounting sleeve 1, and at this time, the contraction rope 21 in the mounting sleeve 1 is in the shape of “V”, so that the first piston rod 17 can smoothly move backward through the contraction rope 21 to drive the second piston rod 18 to move backward, and the second piston rod 18 can be retracted into the first piston rod 17, so that the butter extraction device can extract more butter into the butter gun barrel, to ensure that there is enough butter in the butter gun barrel to complete the work, thereby reducing the subsequent butter extraction work and increasing the work efficiency. Since the mounting sleeve 1 and the piston 4 are arranged with the oil pushing spring 20, during the previous butter extraction work, the second piston rod 18 and the piston 4 on the second piston rod 18 will move backward along the first piston rod 17, when the butter extraction work is completed, at this time, the oil pushing spring 20 is in the compressed state, the compressed oil pushing spring 20 drives the piston 4 and the second piston rod 18 to move outward relative to the first piston rod 17, the piston 4 drives the contraction rope 21 to move outward synchronously, the contraction rope 21 moves to drive the first piston rod 17 to move forward along the threaded rod 7 through the driving table 22, at this time, during the forward movement of the first piston rod 17, the threaded rod 7 will rotate in place, finally, the second piston rod 18 and the first piston rod 17 move outward synchronously, and under the pushing force of the oil pushing spring 20, the butter in the butter gun barrel is extruded into the working head of the butter gun, then the butter gun works to squeeze out the butter, and the length of the contraction rope 21 is shorter than the sum of the lengths of the first piston rod 17 and the second piston rod 18, when the butter in the butter gun barrel is completely used up, the first piston rod 17 can be effectively limited to separate from the mounting sleeve 1, and the second piston rod 18 can be effectively limited to separate from the first piston rod 17, to ensure that the butter extraction device can normally extract butter subsequently, and will not affect the normal work of the butter extraction device because the first piston rod 17 separates from the mounting sleeve 1 or the second piston rod 18 separates from the first piston rod 17.

[0049] Preferably, the driving end 8 is provided with a ratchet wheel 34, the mounting sleeve 1 is rotationally connected with a poking rod 35, the front end of the poking rod 35 is provided with a pawl 36 which is clamped with the ratchet wheel 34, the pawl 36 can be clamped with the ratchet wheel 34 so that the threaded rod 7 can only rotate in one direction; the pawl 36 at the front end of the poking rod 35 is clamped with the ratchet wheel 34 on the driving end 8, and the ratchet wheel 34 mechanism is formed by the poking rod 35, the pawl 36 and the ratchet wheel 34, which is a one-way intermittent motion mechanism and can be used for one-way driving and preventing reverse rotation, and is commonly used in the indexing of various machine tools or rotary tables; when the user controls the driving end 8 to rotate counterclockwise for pumping oil, the threaded rod 7 can also rotate counterclockwise normally at this time, so that the grease can be normally pumped into the grease gun barrel; but when the user stops controlling the driving end 8 to rotate, the compressed oil pushing spring 20 will push the piston 4 and the second piston rod 18 to move forward at this time, the piston 4 moves forward and drives the contraction rope 21 to move forward, the contraction rope 21 moves forward and drives the first piston rod 17 to move forward through the driving table 22, the first piston rod 17 moves forward and drives the threaded rod 7 to rotate clockwise, the threaded rod 7 rotates clockwise and drives the driving end 8 at the bottom end of the threaded rod 7 and the ratchet wheel 34 on the driving end 8 to rotate clockwise at this time, but under the pushing force of the oil pushing spring 20, the piston 4 can normally push the grease in the grease gun barrel to move outward, but since the user needs to install the grease gun barrel to the grease gun head after completing the oil pumping work, a certain time is needed in this process, but under the pushing force of the oil pushing spring 20, the oil pushing spring 20 will eventually drive the piston 4 to move outward, thereby directly pushing the grease in the grease gun barrel out of the grease gun barrel, which causes waste of grease and affects the installation of the grease gun barrel to the grease gun head, and the ratchet wheel 34 mechanism is arranged in the utility model, when the user completes the oil pumping work, the pawl 36 on the poking rod 35 is clamped with the ratchet wheel 34 at this time, thereby limiting the clockwise rotation of the ratchet wheel 34 and limiting the clockwise rotation of the threaded rod 7, the clockwise rotation of the threaded rod 7 cannot be realized, the first piston rod 17 and the driving table 22 on the first piston rod 17 cannot move forward, and finally the contraction rope 21, the piston rod 3 and the piston 4 cannot move forward, so that the oil pushing spring 20 cannot push the grease in the grease gun barrel to move forward through the piston 4, which can avoid the situation that the grease in the grease gun barrel is directly pushed out of the grease gun barrel by the piston 4 during the process that the user installs the grease gun barrel to the grease gun head, can avoid the waste of grease, and enables the user to smoothly install the grease gun barrel to the grease gun head, when the grease gun barrel is filled with grease, the threaded sleeve 12 on the first piston rod 17 will enter the idling part 14, at this time the threaded rod 7, the driving end 8 and the ratchet wheel 34 can rotate counterclockwise relative to the pawl 36, the user can rotate the rear end of the poking rod 35 counterclockwise, so that the pawl 36 at the front end of the poking rod 35 is separated from the ratchet wheel 34, at this time the ratchet wheel 34, the driving end 8 and the threaded rod 7 can rotate clockwise,The driving end 8 and the ratchet wheel 34 can rotate counterclockwise relative to the pawl 36, so that the push spring can push the butter into the butter gun working head through the piston 4, and the butter gun can be used normally. When the butter in the butter gun barrel is only half filled, the threaded sleeve 12 in the first piston rod 17 does not enter the idling part 14, but the threaded rod 7, the driving end 8 and the ratchet wheel 34 can still rotate counterclockwise relative to the pawl 36. The user only needs to slightly rotate the driving rod 35 counterclockwise, and then the ratchet wheel 34, the driving end 8 and the threaded rod 7 can rotate clockwise, so that the butter gun can be used normally.

[0050] Preferably, the rear end of the mounting sleeve 1 is provided with an extension ring 29, the driving end 8 passes through the mounting sleeve 1 and is located in the extension ring 29, the driving rod 35 and the ratchet wheel 34 on the driving end 8 are located in the extension ring 29, the extension ring 29 is provided with a sliding groove 37, the rear end of the driving rod 35 passes through the sliding groove 37 and protrudes out of the extension ring 29, the driving rod 35 is provided with a mounting part 40, the mounting part 40 is provided with a mounting column 41, the mounting column 41 is sleeved with a torsion spring 42, the two ends of the torsion spring 42 are respectively provided with a first feeler 43 and a second feeler 44, the first feeler 43 is located in the extension ring 29 and abuts against the inner wall of the extension ring 29, the driving rod 35 is provided with a mounting hole 45, and one end of the second feeler 44 is located in the mounting hole 45. Because the mounting part 40 of the driving rod 35 is provided with the mounting column 41, the mounting column 41 is sleeved with the torsion spring 42, the first feeler 43 on the torsion spring 42 abuts against the inner wall of the extension ring 29, and one end of the second feeler 44 on the torsion spring 42 is located in the mounting hole 45 of the driving rod 35, when the driving end 8 rotates counterclockwise, the ratchet wheel 34 will rotate counterclockwise relative to the pawl 36, at this time, the ratchet wheel 34 will drive the pawl 36 to slide on the ratchet wheel 34, and the pawl 36 will drive the driving rod 35 to swing counterclockwise in the sliding process, so that the second feeler 44 on the torsion spring 42 deforms, and the pawl 36 can always abut against the ratchet wheel 34. At this time, the ratchet wheel 34 can normally rotate counterclockwise, the threaded rod 7 can also normally rotate counterclockwise, and the driving end 8 passes through the mounting sleeve 1 and is located in the extension ring 29, so that the user can control the rotation of the driving end 8.

[0051] Preferably, the fixing assembly comprises a fixing cover 30 connected with the extension ring 29, a connecting cover 19 sleeved on the extension ring 29, and an abutting ring 38 located between the connecting cover 19 and the fixing cover 30, and the abutting ring 38 is provided with a corresponding notch 39 corresponding to the sliding groove 37, the rear end of the toggle lever 35 passes through the sliding groove 37 and the notch 39 and is exposed outside the extension ring 29, the top end of the fixing cover 30 is provided with a through hole 33 through which the driving end 8 passes, the inner wall of the connecting cover 19 is provided with threads, the connecting cover 19 can be connected with the grease gun barrel through the threads on the inner wall, the extension ring 29 is provided with external threads 31, and the inner wall of the fixing cover 30 is provided with internal threads 32 matched with the external threads 31, after the fixing cover 30 is threadedly connected to the extension ring 29, the fixing cover 30 abuts against the abutting ring 38; the through hole 33 at the top end of the fixing cover 30 enables the driving end 8 to be smoothly exposed outside the mounting sleeve 1, thereby facilitating the user to control the threaded rod 7 to rotate through the driving end 8, before the user fixes the mounting sleeve 1 into the grease gun barrel, the user needs to first sequentially sleeve the connecting cover 19 and the abutting ring 38 onto the extension ring 29 at the rear end of the mounting sleeve 1, because the extension ring 29 is provided with external threads 31 and the inner wall of the fixing cover 30 is provided with internal threads 32 matched with the external threads 31, at this time, the user can rotate the fixing cover 30 to connect the fixing cover 30 to the extension ring 29, at this time, the fixing cover 30 abuts against the upper end surface of the extension ring 29, and the lower end surface of the extension ring 29 abuts against the connecting cover 19, under the pressure of the fixing cover 30, the connecting cover 19 and the extension ring 29 are locked on the extension ring 29, and the notch 39 on the abutting ring 38 corresponds in position to the sliding groove 37 on the extension ring 29, thereby avoiding the situation that the sliding groove 37 on the extension ring 29 is blocked after the fixing cover 30 is connected to the extension ring 29, enabling the rear end of the toggle lever 35 rotationally connected to the top end of the mounting sleeve 1 to pass through the sliding groove 37 and the notch 39 and be exposed outside the extension ring 29, thereby facilitating the user to control the toggle lever 35 to rotate, and the connecting cover 19 is a rear cover commonly used at the rear end of the grease gun barrel on the market, the inner wall of the connecting cover 19 is provided with threads, and the rear end of the grease gun barrel on the market is provided with threads, the user can place the mounting sleeve 1 into the grease gun barrel, and then rotate the connecting cover 19 to connect the connecting cover 19 with the grease gun barrel, thereby fixing the oil pumping device into the grease gun barrel, this structure for fixing the oil pumping device into the grease gun barrel is simple, time-saving and labor-saving, and the installation steps are relatively convenient, enabling the user who separately purchases the oil pumping device to be able to install it by himself.

[0052] Preferably, the inner wall of the mounting sleeve 1 is provided with a rotation stopping protrusion 16, the outer wall of the piston rod 3 is provided with a first rotation stopping groove 15, the rotation stopping protrusion 16 is located in the first rotation stopping groove 15 and abuts against the piston rod 3, so as to limit the rotation of the piston rod 3 relative to the mounting sleeve 1; the number of the first rotation stopping groove 15 is four, the four first rotation stopping grooves 15 are respectively annularly arranged on the outer wall of the piston rod 3, and the number of the rotation stopping protrusion 16 on the inner wall of the mounting sleeve 1 is also four, the rotation stopping protrusion 16 is located in the first rotation stopping groove 15 and abuts against the piston rod 3, the number of the rotation stopping protrusion 16 and the first rotation stopping groove 15 is four, which can ensure that the piston rod 3 cannot rotate relative to the mounting sleeve 1 at all, so that the threaded rod 7 can normally control the backward movement of the piston rod 3 in the mounting sleeve 1 after being rotated, and the oil pumping device can normally complete the oil pumping work.

[0053] Preferably, the piston 4 is provided with a connecting portion 24, the connecting portion 24 is provided with a connecting hole 25, the front end of the contraction rope 21 is arranged in the connecting hole 25 and fixedly connected with the connecting portion 24, the front end of the mounting sleeve 1 is provided with a fixing hole 26, the rear end of the contraction rope 21 passes through the driving hole 23 and is located in the fixing hole 26 and fixedly connected with the front end of the mounting sleeve 1; the front end of the contraction rope 21 is fixedly connected with the piston 4 through the connecting hole 25 on the connecting portion 24, and the rear end of the contraction rope 21 is fixedly connected with the mounting sleeve 1 through the fixing hole 26 at the front end of the mounting sleeve 1, so that the contraction rope 21 can be smoothly connected with the piston 4 and the mounting sleeve 1, and the number of the connecting portion 24 on the piston 4, the driving table 22 at the bottom end of the first piston rod 17, the contraction rope 21 and the fixing hole 26 at the top end of the mounting sleeve 1 is two, so that the piston 4 can be uniformly stressed during the process that the oil pushing spring 20 pushes the piston 4 to move outward along the grease gun barrel, thereby avoiding the deviation of the piston 4 during the oil pushing process.

[0054] Preferably, the inner wall of the first piston rod 17 is provided with a second rotation stopping groove 27, the outer wall of the second piston rod 18 is provided with a rotation stopping block 28, and the rotation stopping block 28 is arranged in the second rotation stopping groove 27 and abuts against the first piston rod 17; the arrangement of the rotation stopping block 28 and the second rotation stopping groove 27 can limit the rotation of the second piston rod 18 relative to the first piston rod 17, so that the second piston rod 18 can only move linearly when the oil pushing spring 20 pushes the piston 4 to drive the second piston rod 18 to move outward, thereby avoiding the rotation of the second piston rod 18 during the outward movement, and reducing the friction between the second piston rod 18 and the first piston rod 17, thereby avoiding the damage of the second piston rod 18 and the first piston rod 17 due to the serious wear after long-time use of the water pumping device.

[0055] Preferably, the driving end 8 is provided with a driving device, the driving device comprises a control handle 9 fixedly connected with the driving end 8, and a polygonal rotating groove 10 is arranged at the top of the driving end 8, which is suitable for the working head of an electric wrench or a hand electric drill; the user can drive the driving end 8 to rotate by rotating the control handle 9, and the control handle 9 is convenient for the user to control the rotation of the driving end 8; the top of the driving end 8 is provided with a polygonal rotating groove 10, which can be quadrangular or hexagonal; the electric wrench and the hand electric drill are common electric tools on the market, and the working head suitable for the polygonal rotating groove 10 can be installed on the electric wrench or the hand electric drill; after the working head is inserted into the polygonal rotating groove 10, the user presses the switch on the electric wrench or the hand electric drill, so that the working head drives the driving end 8 to rotate synchronously; at this time, the threaded rod 7 rotates, so that the user can drive the threaded rod 7 to rotate without manually rotating the driving end 8, the rotation mode of the threaded rod 7 is more labor-saving, the rotation speed of the threaded rod 7 is faster, the speed of the piston 2 moving backward is also faster, the grease gun cylinder can be more quickly and efficiently used to extract oil.

[0056] The above embodiments are only preferred embodiments of the utility model, and do not limit the protection scope of the utility model, so that: equivalent changes made according to the structure, shape and principle of the utility model should be covered in the protection scope of the utility model.

Claims

1. A grease gun extraction device, comprising a mounting sleeve (1) disposed within a grease gun barrel, a piston (2) slidably disposed within the mounting sleeve (1), and a fixing assembly for fixing the mounting sleeve (1) within the grease gun barrel, characterized in that: The piston component (2) includes a piston rod (3) disposed in the mounting sleeve (1) and a piston (4) disposed on the piston rod (3). The piston (4) can fit against the inner wall of the grease gun barrel. A threaded rod (7) is rotatably disposed in the mounting sleeve (1). A threaded hole (13) is provided on the piston rod (3) to cooperate with the threaded rod (7). The threaded rod (7) passes through the threaded hole (13). A drive end (8) is provided at the rear end of the threaded rod (7). Controlling the rotation of the drive end (8) can drive the piston rod (3) and the piston (4) to move back and forth along the threaded rod (7) by the threaded rod (7).

2. The oil extraction device of a grease gun according to claim 1, characterized in that: The piston rod (3) includes a threaded sleeve (12), and the threaded hole (13) is opened on the threaded sleeve (12). The threaded rod (7) is provided with a free-spinning part (14) with a smooth outer wall. The free-spinning part (14) is located in front of the drive end (8). Driving the threaded rod (7) to rotate can drive the threaded sleeve (12) and the piston rod (3) to move back and forth along the threaded rod (7). When the piston rod (3) moves backward to the maximum distance, the threaded sleeve (12) enters the free-spinning part (14). At this time, the threaded rod (7) and the threaded sleeve (12) are in a disengaged state.

3. The oil extraction device of a grease gun according to claim 1, characterized in that: The piston rod (3) includes a first piston rod (17) and a second piston rod (18) nested together. A threaded hole (13) is formed in the first piston rod (17). The threaded rod (7) passes through the threaded hole (13) and is threadedly connected to the first piston rod (17). The second piston rod (18) is slidable relative to the first piston rod (17). The piston (4) is mounted on the second piston rod (18). A push spring (20) is provided between the mounting sleeve (1) and the piston (4). A retractable rope (21) connects the mounting sleeve (1) and the piston (4). A drive platform (22) is provided at the rear end of the first piston rod (17). The moving platform (22) has a drive hole (23) through which the rear end of the retractable rope (21) passes. The front end of the retractable rope (21) is connected to the piston (4), and the rear end of the retractable rope (21) passes through the drive hole (23) and is connected to the front end of the mounting sleeve (1). Driving the threaded rod (7) to rotate can control the first piston rod (17) and the driving platform (22) to move backward along the threaded rod (7). The backward movement of the driving platform (22) will cause the middle part of the retractable rope (21) to move backward. At this time, the retractable rope (21) will drive the second piston rod (18) to move backward along the first piston rod (17), thereby causing the first piston rod (17) to retract into the second piston rod (18).

4. The grease extraction device of a grease gun according to any one of claims 1-3, characterized in that: The drive end (8) is provided with a ratchet (34), and the mounting sleeve (1) is rotatably connected with a lever (35). The front end of the lever (35) is provided with a pawl (36) that engages with the ratchet (34). The pawl (36) can engage with the ratchet (34) so ​​that the threaded rod (7) can only rotate in one direction.

5. The oil extraction device of a grease gun according to claim 4, characterized in that: The mounting sleeve (1) has an extension ring (29) at its rear end. The drive end (8) passes through the mounting sleeve (1) and is located inside the extension ring (29). The actuating rod (35) and the ratchet (34) on the drive end (8) are both located inside the extension ring (29). The extension ring (29) has a sliding groove (37). The rear end of the actuating rod (35) passes through the sliding groove (37) and protrudes outside the extension ring (29). The actuating rod (35) has a mounting part (…). 40), the mounting part (40) is provided with a mounting post (41), the mounting post (41) is fitted with a torsion spring (42), the two ends of the torsion spring (42) are respectively provided with a first antenna (43) and a second antenna (44), the first antenna (43) is located inside the extension ring (29) and abuts against the inner wall of the extension ring (29), the actuating rod (35) is provided with a mounting hole (45), and one end of the second antenna (44) is located inside the mounting hole (45).

6. The oil extraction device of a grease gun according to claim 5, characterized in that: The fixing assembly includes a fixing cover (30) connected to the extension ring (29), a connecting cover (19) sleeved on the extension ring (29), and an abutment ring (38). The abutment ring (38) is located between the connecting cover (19) and the fixing cover (30), and the abutment ring (38) has a notch (39) corresponding to the sliding channel (37). The rear end of the actuating rod (35) passes through the sliding channel (37) and the notch (39) and protrudes outside the fixing cover of the extension ring (29). The top of the 30) has a through hole (33) for the drive end (8) to pass through. The inner wall of the connecting cover (19) is threaded. The connecting cover (19) can be threaded to the grease gun barrel through the thread of the inner wall. The extension ring (29) is provided with an external thread (31). The inner wall of the fixing cover (30) is provided with an internal thread (32) that matches the external thread (31). After the fixing cover (30) is threaded to the extension ring (29), the fixing cover (30) abuts against the abutting ring (38).

7. The oil extraction device of a grease gun according to claim 1, characterized in that: The inner wall of the mounting sleeve (1) is provided with an anti-rotation protrusion (16), and the outer wall of the piston rod (3) is provided with a first anti-rotation groove (15). The anti-rotation protrusion (16) is located in the first anti-rotation groove (15) and abuts against the piston rod (3), thereby restricting the piston rod (3) from rotating relative to the mounting sleeve (1).

8. The oil extraction device of a grease gun according to claim 3, characterized in that: The piston (4) is provided with a connecting part (24), and a connecting hole (25) is provided on the connecting part (24). The front end of the retractable rope (21) is located in the connecting hole (25) and fixedly connected to the connecting part (24). The front end of the mounting sleeve (1) is provided with a fixing hole (26). The rear end of the retractable rope (21) passes through the drive hole (23) and is located in the fixing hole (26) and fixedly connected to the front end of the mounting sleeve (1).

9. The oil extraction device of a grease gun according to claim 3, characterized in that: The inner wall of the first piston rod (17) is provided with a second anti-rotation groove (27), and the outer wall of the second piston rod (18) is provided with an anti-rotation block (28). The anti-rotation block (28) is disposed in the second anti-rotation groove (27) and engages with the first piston rod (17).

10. The oil extraction device of a grease gun according to any one of claims 1-3, characterized in that: The drive end (8) is provided with a drive device, which includes a control handle (9) fixedly connected to the drive end (8). The top of the drive end (8) is provided with a polygonal rotating groove (10), which can be adapted to the working head of an electric wrench or electric drill.

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