A pulling device for a shock absorber connecting rod

Abstract

The present invention relates to the field of shock absorbers, and discloses a pulling device for a shock absorber connecting rod, comprising a cylinder, a clamping block, and an outer bushing fixedly connected to the cylinder, wherein the cylinder comprises a retractable piston rod arranged in a cylinder barrel, the piston rod extending from a guide seat of the cylinder and extending into the outer bushing, the retractable end of the piston rod being connected to the clamping block, the clamping block being fixed to the connecting rod of the shock absorber, the clamping block extending or retracting into the outer bushing as the piston rod retracts, and when the clamping block retracts into the outer bushing, the anti-pressure pad of the shock absorber abuts against the outer end surface of the outer bushing. The present invention has the advantages of reducing the labor intensity of a light operator, being able to ensure that the connecting rod is stretched into place each time, having a simple structure, being easy to operate, occupying little site space, and having strong versatility.

Description

Technical Field

[0001] The present invention relates to the field of shock absorbers, and in particular to a pulling-out device for a shock absorber connecting rod. Background Art

[0002] Automobile suspension is used to reduce the impact of automobile shock absorbers. The McPherson type shock absorbers used in independent suspension are produced in large quantities by major shock absorber manufacturers at home and abroad, such as Figures 2 to 3 As shown, after this type of shock absorber 4 is painted, the shock absorber assembly needs to be assembled with external structural parts such as coil springs 43 before it can become a complete shock absorber strut assembly and be sent to the main engine manufacturer for installation. The connecting rod 41 of the shock absorber needs to be pulled out to its longest length before it can be assembled. Therefore, before the shock absorber assembly begins to be assembled, the connecting rod 41 needs to be pulled out and the top of the connecting rod 41 needs to be fully stretched into place. The connecting rod 41 is generally stretched into place manually, which is very labor-intensive, labor-intensive, and has low work efficiency. The operator's long-term mechanical pulling out of the connecting rod 41 is bound to affect his health. In addition, manual stretching cannot guarantee that it can be fully stretched into place every time. Therefore, it is urgent to provide a device that can automatically pull out the connecting rod 41. Summary of the Invention

[0003] In order to overcome the problems in the above-mentioned background technology that manually pulling out the connecting rod is very labor-intensive, has low work efficiency, affects physical health, and cannot ensure that it can be fully stretched into place every time, the present invention provides a pulling device for the shock absorber connecting rod, which greatly reduces the labor intensity of light operators, can ensure that the connecting rod is stretched into place every time, has a simple structure, is easy to operate, occupies little site space, and has strong versatility.

[0004] The technical solutions of the present invention are as follows:

[0005] A pulling-out device for a shock absorber connecting rod comprises a cylinder, a clamping block and an outer sleeve fixedly connected to the cylinder, the cylinder comprising a retractable piston rod arranged in a cylinder barrel, the piston rod extending from a guide seat of the cylinder and extending into the outer sleeve, the retractable end of the piston rod being connected to the clamping block, the clamping block being fixed to the connecting rod of the shock absorber, the clamping block extending out or retracting into the outer sleeve as the piston rod moves in a retractable manner, and when the clamping block retracts into the outer sleeve, the anti-pressure pad of the shock absorber abuts against the outer end face of the outer sleeve.

[0006] Compared with the existing technology, the beneficial effects of this technical solution are:

[0007] (1) The connecting rod is pulled out by utilizing the retractability of the cylinder piston rod, which saves manpower, reduces work intensity, and avoids the problem of manually pulling out the connecting rod in the background art, which consumes a lot of manpower.

[0008] (2) The setting of the clamping block can not only connect the piston rod of the cylinder and the connecting rod of the shock absorber, but also fix the connecting rod, making it easier to stretch the connecting rod out stably later.

[0009] (3) By arranging an anti-pressure pad to abut against the end surface of the outer bushing, the anti-pressure pad will not extend into the outer bushing, so that the connecting rod can be pulled out smoothly when the piston rod of the cylinder contracts.

[0010] (4) The pulling-out device designed in the present invention takes up little space and can pull out the connecting rod very conveniently and easily without much effort, which greatly saves manpower and reduces work intensity. The cylinder can be extended and retracted once, which is convenient and quick to operate, takes less time, has a fast production rhythm, and has high production efficiency.

[0011] Preferably, the clamping block comprises two movably connected half nuts, each connected by a through pin extending through protruding portions of the two half nuts. The two half nuts can be closed or opened around the through pin, and the lower inner sides of the half nuts are tapped with threads that mate with the top end of the connecting rod. Providing two half nuts that can close and open around the through pin increases the speed of securing the connecting rod of the shock absorber to the clamping block, reduces the time required for securing the two, and further improves production efficiency.

[0012] Further preferably, the arcuate surface of the lower portion of one of the two half nuts is smaller than that of the other, and the protrusion of one half nut is clamped inside the protrusion of the other half nut. This makes it easier to secure the clamping block to the connecting rod, reduces the error rate, and also ensures a more snug connection between the clamping block and the connecting rod.

[0013] Further preferably, the cylinder is arranged vertically, and a coaxially connected sleeve and inner sleeve are provided in the outer sleeve, the telescopic end of the piston rod extends into the inner sleeve, and the bolt is fixed on the end face of the telescopic end through a fixing nut, and the two ends of the inner sleeve respectively abut against an inner end face of the sleeve and the fixing nut.

[0014] By arranging the cylinder vertically, other connecting parts will also be arranged vertically. Under the action of gravity, the inner bushing and sleeve will not move upward along the piston rod. By setting a fixing nut, the inner bushing and sleeve can be restricted from moving downward and separating from the piston rod. Therefore, when the piston rod contracts, the inner bushing and sleeve will keep moving synchronously with the piston rod, and will not affect the stretching of the pull rod by the cylinder. The setting of the inner bushing not only maintains a stable connection between the piston rod and the sleeve, but most importantly, the length of the inner bushing can determine the length of the pull rod to be pulled out. Therefore, by configuring inner bushings of different lengths, connecting rods of different lengths can be stretched into place through the same cylinder. When stretching pull rods of different lengths, only the inner bushing needs to be replaced, and other components can remain unchanged. It has strong versatility and is very convenient.

[0015] Further preferably, a spring washer is provided between the telescopic end of the piston rod and the fixing nut, and one end of the inner sleeve abuts against the spring washer. The provision of the spring washer increases the connection stability between the piston rod and the fixing nut.

[0016] Further preferably, the other end of the sleeve is fixedly connected to the clamping block via a tie rod, and the inner and outer sides of the tie rod nut are respectively connected to the inner wall of the sleeve and the rod body of the tie rod via threaded connections. The inner and outer sides of the tie rod nut are fixed to the inner wall of the sleeve and the rod body via threaded connections, facilitating the fixed connection of the clamping block to the sleeve via the tie rod. The threaded connection ensures a stable connection while facilitating assembly and disassembly of the various components.

[0017] Further preferably, one end of the pull rod protrudes outwardly to form an annular protrusion, which is clamped in the middle of the upper parts of the two half nuts. This design is simple and effective, and the pull rod is easily fixed to the clamping block.

[0018] Preferably, one end of the outer bushing is provided with a plurality of slots evenly spaced around the circumference, through which screws are passed to secure the outer bushing to the guide seat. By providing the screws with slots evenly spaced around the circumference of the outer bushing connection end, the connection between the outer bushing and the cylinder can be strengthened, thereby preventing the outer bushing from falling off when the cylinder stretches the connecting rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be described with reference to the accompanying drawings, in which:

[0020] Figure 1 It is a cross-sectional view of the overall structure of the present invention when the clamping blocks are closed;

[0021] Figure 2 This is a schematic diagram of the structure of the connecting rod of the shock absorber without any other parts assembled;

[0022] Figure 3 Schematic diagram of the structure after assembling parts for the connecting rod of the shock absorber;

[0023] Figure 4 Schematic diagram of the structure of the outer bushing of the present invention;

[0024] Figure 5 It is a side view of the half nut of the present invention;

[0025] Figure 6 A side view of the clamping block of the present invention when it is opened;

[0026] Figure 7 A top view of the clamping block of the present invention;

[0027] Figure 8 A bottom view of the clamping block of the present invention;

[0028] Figure 9This is a schematic structural diagram of the threading pin of the present invention;

[0029] Figure 10 is a cross-sectional view of the sleeve of the present invention;

[0030] Figure 11 is a cross-sectional view of the inner liner of the present invention;

[0031] Figure 12 Schematic diagram of the structure of the pull rod of the present invention.

[0032] Figure markings: cylinder 1, piston rod 11, guide seat 12, cylinder barrel 13, outer sleeve 2, slot 20, screw 201, sleeve 21, through hole 211, inner end face 212, inner sleeve 22, fixing nut 23, spring washer 24, clamping block 3, pull rod 31, annular protrusion 310, pull rod nut 32, half nut 33, protrusion 331, connecting through hole 332, clamping part 333, through pin 34, shock absorber 4, connecting rod 41, anti-pressure pad 42, coil spring 43. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0034] Example 1: Figures 1 to 12 The pulling device for a shock absorber connecting rod shown in the figure includes a cylinder 1, an outer bushing 2 and a clamping block 3. The cylinder 1 refers to a cylindrical metal part that guides the piston to perform linear reciprocating motion in the cylinder 13. The air in the engine cylinder 1 converts thermal energy into mechanical energy by expansion. The gas in the compressor cylinder 1 is compressed by the piston to increase the pressure. When the cylinder 1 moves, it drives the piston rod 11 to extend from the guide seat 12 or retract into the cylinder 13. This pulling device uses a cylinder 1 with an air source of 0.4 to 0.6 MPa. One end of the outer sleeve 2 is fixed on the guide seat 12 of the cylinder 1, and the telescopic end of the piston rod 11 extends from the guide seat 12, extends into the outer sleeve 2 and is connected to the clamping block 3. The clamping block 3 is fixed to the connecting rod 41 of the shock absorber 4. The clamping block 3 extends or extends into the outer sleeve 2 as the piston rod 11 moves. When the clamping block 3 retracts into the outer sleeve 2, the circumferential anti-pressure pad 42 of the connecting rod 41 abuts against the outer end face of the outer sleeve 2 and will not extend into the outer sleeve 2.

[0035] When the piston rod 11 of the cylinder 1 is in the extended state, the clamping block 3 extends out of the outer sleeve 2 and is located outside the outer sleeve 2. The operator fixes the top of the connecting rod 41 in the unpulled state with the clamping block 3, and then starts the cylinder 1. The piston rod 11 retracts. Since the anti-pressure pad 42 abuts against the end face of the outer sleeve 2 and does not extend into the outer sleeve 2, the connecting rod 41 is fixed by the clamping block 3 and extends into the outer sleeve 2 and is stretched out. The operator only needs to fix the connecting rod 41 with the clamping block 3 and start the cylinder 1. No other laborious operation is required. The cylinder 1 can automatically pull out the connecting rod 41, which is very labor-saving. The pulling-out device designed by the present invention takes up little space and can easily and conveniently pull out the connecting rod 41 without any effort, which greatly saves manpower and reduces work intensity. The cylinder 1 can be extended and retracted once, which is convenient and quick to operate, requires less time, has a fast production rhythm, and has high production efficiency.

[0036] Example 2: Based on Example 1, the structure of the clamping block 3 is optimally designed, such as Figures 5 to 8 As shown, the clamping block 3 includes two movably connected half nuts 33. The middle portions of the half nuts 33 protrude outward on the same side, forming two protrusions 331 with a semicircular longitudinal cross-section. The two half nuts 33 are connected by the protrusions 331. The protrusions 331 are provided with connecting through-holes 332. A through-pin 34 passes through the connecting through-holes 332 and engages with the through-holes 332, connecting the two half nuts 33. The two half nuts 33 can be closed or opened around the through-pin 34. The top end of the connecting rod 41 is circumferentially threaded. The lower portion of the half nuts 33 is a clamping portion 333 with an arc-shaped structure and a threaded inner side that mates with the end. When the two half nuts 33 are closed, the clamping portion 333 is threadedly connected to the top end of the connecting rod 41. By providing two half nuts 33 that can close and open around the through-pin 34, the speed of fixed connection between the connecting rod 41 of the shock absorber 4 and the clamping block 3 can be increased, thereby improving production efficiency.

[0037] Further, such as Figure 8 As shown, the arcuate surface of the clamping portion 333 of one of the two half nuts 33 is smaller than that of the other. This arrangement makes it easier to secure the clamping portion 333 to the connecting rod 41, reducing the chance of failure. Furthermore, the protrusion 331 of one half nut 33 is clamped inside the protrusion 331 of the other half nut 33, making it easier to fully secure the connection with the connecting rod 41. In this embodiment, the protrusion 331 of the half nut 33 with the smaller arcuate surface is clamped inside the protrusion 331 of the half nut 33 with the larger arcuate surface.

[0038] Example 3: Based on the above example, the connection mode between the piston rod 11 and the clamping block 3 is preferentially designed, such as Figure 1 As shown, the cylinder 1 is arranged vertically, and the outer sleeve 2 is provided with a sleeve 21 and an inner sleeve 22 which are coaxially connected. The inner sleeve 22 is provided in the sleeve 21. Figure 10As shown, one end of the sleeve 21 protrudes inward to form a through-hole 211 , and one end of the inner bushing 22 abuts against the inner end surface 212 of the through-hole 211 . The telescopic end of the piston rod 11 extends into the through-hole 211 , and the rod body is sleeved in the inner bushing 22 . The bolt passes through the fixing nut 23 and is fixed in the end face of the telescopic end of the piston rod 11, wherein a spring washer 24 is provided between the fixing nut 23 and the end face of the telescopic end, and the two ends of the inner sleeve 22 respectively abut against the inner end face 212 of the sleeve 21 and the spring washer 24. The provision of the spring washer 24 increases the connection stability between the piston rod 11 and the sleeve 21. The fixing nut 23 limits the inner sleeve 22 from moving downward and disengaging from the piston rod 11, and the inner sleeve 22 will limit the sleeve 21 from moving downward and disengaging from the piston rod 11. Since the cylinder 1 is arranged vertically, other components are also arranged vertically. Due to the action of gravity, the inner sleeve 22 and the sleeve 21 will not move upward along the piston rod 11. Therefore, when the pulling device is working, the inner sleeve 22 and the sleeve 21 will keep moving synchronously with the piston rod 11, and will not affect the stretching rod 31. In addition, the provision of the inner sleeve 22 can not only maintain a stable connection between the piston rod 11 and the sleeve 21, but most importantly, the length of the inner sleeve 22 can determine the length to which the pull rod 31 is pulled out. Since the telescopic stroke of the piston rod 11 of the cylinder 1 is fixed, the connecting rod 41 of different types of shock absorbers 4 has different lengths, and the pulling distance when it is fully stretched into place is also different. Therefore, the same model of cylinder 1 cannot meet the requirements of stretching connecting rods 41 of different lengths into place. Therefore, by configuring inner sleeves 22 of different lengths, connecting rods 41 of different lengths can be stretched into place through the same cylinder. The shorter the length of the inner sleeve 22, the smaller the distance the pull rod 31 is pulled out. Conversely, the longer the length of the inner sleeve 22, the greater the distance the pull rod 31 is pulled out. When stretching pull rods 31 of different lengths, you only need to replace the inner sleeve 22, and other components can remain unchanged. It is very convenient and has strong versatility.

[0039] The other end of the sleeve 21 is fixedly connected to the clamping block 3 through a pull rod 31, wherein one end of the pull rod 31 is fixed to the sleeve 21 through a pull rod nut 32. The pull rod nut 32 has threads on both the inside and outside. The lower end of the pull rod nut 32 extends into the sleeve 21, and its outer side is threadedly connected to the inner wall of the sleeve 21. One end of the pull rod 31 extends into the inner side of the pull rod nut 32 and is threadedly connected to it. The inner and outer sides of the pull rod nut 32 are fixed to the inner wall of the sleeve 21 and the rod body of the pull rod 31 through threaded connections, so that the clamping block 3 is fixedly connected to the sleeve 21 through the pull rod 31, and the threaded connection method can not only ensure the stability of the connection, but also facilitate assembly and disassembly between components. Further, as Figure 12 As shown, one end of the pull rod 31 protrudes outward to form an annular protrusion 310, which is clamped between the upper parts of the two half nuts 33, and its annular surface abuts against the inner end surface of the top of the half nut 33, so that the pull rod 31 is fixedly connected to the clamping block 3.

[0040] When in use, the cylinder 1 is hung and placed vertically, the piston rod 11 of the cylinder 1 is initially in the extended state, the clamping block 3 is located outside the extension port of the outer bushing 2, and the top end of the connecting rod 41 that has not been pulled out is placed between the two opened half nuts 33, and its end face abuts against the through pin 34. Then the two half nuts 33 are manually pinched together, and the end of the connecting rod 41 is threadedly connected with the clamping block 3, and the two are fixedly connected. The operation is very simple and the time taken is extremely short; start the cylinder 1, the piston rod 11 retracts and drives the sleeve 21, the connecting rod 41 and the clamping block 3 to move toward the cylinder 1. At this time, the clamping block 3 will also pull the connecting rod 41 into the outer bushing 2. Since the anti-pressure pad 42 of the shock absorber 4 cannot extend into the outer bushing 2, the connecting rod 41 will naturally be pulled out, and since the corresponding inner bushing 22 can be installed according to the actual length of the connecting rod 41, connecting rods 41 of different lengths can be fully stretched into place. After the connecting rod 41 is pulled out, the clamping block 3 is retracted outside the outer sleeve 21, and then the two half nuts 33 are opened and the connecting rod 41 is removed, thus completing the stretching process of the connecting rod 41. The pulling device designed in the present invention occupies a small space, takes up very little time to fix the connecting rod, has very low labor intensity, high production efficiency, is easy to use, and can ensure that the connecting rod 41 can be fully stretched into place every time. It is widely applicable to the stretching process of the connecting rod 41 of various shock absorbers 4.

[0041] Example 4: Based on Example 1, the connection method between the outer bushing 2 and the cylinder 1 is optimally designed. One end of the outer bushing 2 is sleeved on the guide seat 12 of the cylinder 1, as shown in FIG. Figure 4 As shown, the connection end is evenly provided with a plurality of slots 20 along the circumference, and screws 201 pass through the slots 20 and are fixed to the guide seat 12 , so that the outer bushing 2 and the cylinder 1 can be stably connected.

[0042] The above-described embodiments merely represent specific implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of protection of the present application. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the technical concept of the present application, and all such variations and improvements fall within the scope of protection of the present application.

Claims

1. A pulling device for a shock absorber connecting rod, characterized in that: The invention comprises a cylinder (1), a clamping block (3) and an outer sleeve (2) fixedly connected to the cylinder (1), wherein the cylinder (1) comprises a retractable piston rod (11) arranged in a cylinder barrel (13), the piston rod (11) extends from a guide seat (12) of the cylinder (1) and extends into the outer sleeve (2), and its retractable end is connected to the clamping block (3), the clamping block (3) is fixed to a connecting rod (41) of a shock absorber (4), and the clamping block (3) extends or retracts into the outer sleeve (2) as the piston rod (11) retracts. When the clamping block (3) retracts into the outer sleeve (2), the anti-pressure pad (42) of the shock absorber (4) abuts against the outer end surface of the outer sleeve (2); The clamping block (3) comprises two movably connected half nuts (33), the inner side of the lower portion of the half nuts (33) is tapped with a thread that matches the top end of the connecting rod (41), and the arcuate surface of the lower portion of one of the two half nuts (33) is smaller than that of the other; The cylinder (1) is arranged vertically, and a sleeve (21) and an inner sleeve (22) are coaxially connected in the outer sleeve (2). The telescopic end of the piston rod (11) extends into the inner sleeve (22), and a bolt passes through a fixing nut (23) and is fixed to the end surface of the telescopic end. The two ends of the inner sleeve (22) respectively abut against an inner end surface (212) of the sleeve (21) and the fixing nut (23). The other end of the sleeve (21) is fixedly connected to the clamping block (3) via a pull rod (31), and one end of the pull rod (31) protrudes outward to form an annular protrusion (310), which is clamped in the middle of the upper parts of the two half nuts (33).

2. The pull-out device for a shock absorber connecting rod according to claim 1, characterized in that: The two half nuts (33) are connected by a through pin (34) passing through the protrusions (331) of the two half nuts (33), and the two half nuts (33) are closed or opened around the through pin (34).

3. The pull-out device for a shock absorber connecting rod according to claim 2, characterized in that: The protrusion (331) of one of the two half nuts (33) is clamped inside the protrusion (331) of the other half nut (33).

4. The pull-out device for a shock absorber connecting rod according to claim 1, characterized in that: A spring washer (24) is provided between the telescopic end of the piston rod (11) and the fixing nut (23), and one end of the inner sleeve (22) abuts against the spring washer (24).

5. The pull-out device for a shock absorber connecting rod according to claim 1, characterized in that: The inner and outer sides of the pull rod nut (32) are connected to the inner wall of the sleeve (21) and the rod body of the pull rod (31) through threaded connections respectively.

6. The pull-out device for a shock absorber connecting rod according to claim 1, characterized in that: One end of the outer bushing (2) is uniformly provided with a plurality of slots (20) along the circumference, and screws (201) pass through the slots (20) to be fixed to the guide seat (12).

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