Positioning mechanism and spot welding device for spot welding of stop ring of piston rod of shock absorber

Abstract

The utility model belongs to the technical field of shock absorber parts, and particularly relates to a positioning mechanism for spot welding of a stop ring of a shock absorber piston rod and a spot welding device. The positioning mechanism for spot welding of the damper piston rod stop ring comprises a base, a stop ring positioning seat, a spring limiting mechanism and a piston rod positioning seat. A lateral opening extending in the vertical direction is formed in the base, the stop ring positioning seat is arranged in the lateral opening, the stop ring positioning seat is provided with a lateral opening and a stop positioning face, the stop positioning face is located above the lateral opening and used for being matched with a stop ring in a stop mode, and the lateral opening and the lateral opening allow a piston rod to be placed in and taken out in the radial direction of the stop ring positioning seat; a piston rod positioning groove is formed in the piston rod positioning seat, and the top of the piston rod positioning seat is used for being matched with a step on the piston rod in a stopping mode. The spot welding device for the stop ring of the piston rod of the shock absorber comprises a pressing mechanism, a jacking mechanism and the positioning mechanism for spot welding of the stop ring of the piston rod of the shock absorber. The piston rod and the stop ring can be quickly positioned.

Description

Technical Field

[0001] This utility model belongs to the technical field of shock absorber components, specifically relating to a positioning mechanism and spot welding device for spot welding the piston rod stop ring of a shock absorber. Background Technology

[0002] The main function of the retaining ring on the shock absorber is to limit the stroke of the shock absorber. It is usually welded to the piston rod. The connection strength between the retaining ring and the piston rod, as well as the surface quality of the piston rod, directly affect the performance of the shock absorber.

[0003] Chinese utility model patent CN210498775U discloses a piston rod stop ring spot welding positioning fixture, which consists of two symmetrically arranged fastening bodies. The fastening body includes a semi-cylindrical main body, a stop ring positioning seat located on the upper part of the main body, and a piston rod positioning seat located on the lower part of the main body. The main body has a main body cavity. The stop ring positioning seat is composed of an integrally set semi-circular conical positioning head and an upper seat body. A piston rod upper positioning through groove coaxial with the main body cavity is provided at the center of its fastening surface. The piston rod positioning seat is composed of an integrally set semi-circular cylindrical positioning head and a lower seat body. A piston rod lower positioning through groove coaxial with the main body cavity is provided at the center of its fastening surface. The semi-circular bottom surface of the lower seat body is consistent with the semi-circular diameter of the main body connection end face. A baffle is provided on the bottom end face of the cylindrical positioning head. The two are connected by bolts. When using, place the piston rod in the upper positioning groove of the piston rod of the stop ring positioning seat and the lower positioning groove of the piston rod of the piston rod positioning seat. The bottom of the piston rod should contact the baffle on the piston rod positioning seat. After fastening the other half of the fastening body, insert the stop ring through the piston rod and fasten it onto the upper conical positioning head of the stop ring positioning seat. Then, directly weld the connection between the piston rod and the stop ring.

[0004] The aforementioned piston rod stop ring spot welding positioning fixture requires two symmetrically arranged fastening bodies to be fastened together and connected by a baffle when positioning the piston rod and stop ring. After welding, the baffle needs to be removed first, and the two fastening bodies need to be separated before the welded piston rod and stop ring can be taken out. The operation is cumbersome and the positioning efficiency is low. Utility Model Content

[0005] The purpose of this utility model is to provide a positioning mechanism and spot welding device for spot welding piston rod stop rings of shock absorbers, so as to solve the technical problems of low positioning efficiency and cumbersome operation of existing piston rod stop ring spot welding positioning fixtures.

[0006] To solve the above problems, the positioning mechanism for spot welding the piston rod stop ring of the shock absorber provided by this utility model adopts the following technical solution:

[0007] A positioning mechanism for spot welding the piston rod stop ring of a shock absorber includes a base, a stop ring positioning seat, a spring limiting mechanism, and a piston rod positioning seat;

[0008] The base is provided with a lateral opening extending in the vertical direction. The stop ring positioning seat is disposed in the lateral opening. The stop ring positioning seat has a lateral opening and a stop positioning surface. The stop positioning surface is located above the lateral opening and is used to stop and cooperate with the stop ring. The lateral opening and the lateral opening are vertically connected and the diameter of the lateral opening is not greater than the minimum diameter of the lateral opening, so as to allow the piston rod to be inserted and removed along its radial direction.

[0009] The spring limiting mechanism includes two spring claws and a spring connected to the same end of the two spring claws. Each spring claw is rotatably mounted on the base. In its natural state, the main body of the two spring claws forms a guide port and a limiting port. The limiting port is vertically opposite to the side opening. The piston rod is inserted into the side opening and the limiting port through the guide port.

[0010] The piston rod positioning seat is provided with a piston rod positioning groove for the piston rod to be inserted, and the top of the piston rod positioning seat is used to engage with the step on the piston rod for a stop.

[0011] The beneficial effects of the positioning mechanism for spot welding the piston rod stop ring of a shock absorber are as follows: In use, the piston rod with the stop ring fitted is inserted from one side of the guide port through a lateral opening into the position of the limiting port and the lateral opening. The lower end of the piston rod is inserted into the piston rod positioning seat, and the step of the piston rod makes stop contact with the piston rod positioning seat. The stop ring is positioned on the stop ring positioning seat through the stop positioning surface, achieving rapid positioning of the piston rod and the stop ring, thus improving the positioning efficiency. After welding is completed, simply open the guide port and pull the bottom end of the piston rod out of the piston rod positioning seat. The piston rod and the stop ring can then be quickly pulled out from the lateral opening. The entire positioning and disassembly process is simple and quick, ensuring welding efficiency.

[0012] Furthermore, each pawl has a V-shaped limiting surface and a guide ramp. The distance between the guide ramps of the two pawls gradually decreases in the radial direction of the piston rod from the direction away from the lateral opening to the direction closer to the lateral opening. The minimum diameter of the guide opening is smaller than the diameter of the piston rod inserted into the lateral opening.

[0013] Beneficial effects: The V-shaped limiting surface facilitates the centering of the piston rod and prevents it from wobbling back and forth; when the piston rod is inserted from the guide port, it will squeeze the two spring claws, causing them to open and then enter the limiting port and the side opening through the guide port, making operation more convenient.

[0014] Furthermore, the spring claw includes a mounting part and a main body part. The V-shaped limiting surface and the guide slope are both located on the main body part. The mounting part is rotatably assembled with the base, and the spring is fixed between the mounting parts of the two spring claws. The main body part and the mounting part are detachably connected.

[0015] Beneficial effects: When the main body is damaged, it can be removed and replaced from the mounting part without replacing the entire spring limiting mechanism; in addition, different sizes of main bodies can be replaced to limit piston rods of different diameters.

[0016] Furthermore, the stop ring positioning seat is detachably connected to the base.

[0017] Beneficial effect: The stop ring positioning seat with different sizes of side openings can be replaced to position piston rods of different diameters.

[0018] Furthermore, the base is provided with an installation groove that is adapted to the stop ring positioning seat, and the bottom of the installation groove is used to slide and engage with the stop ring positioning seat in the vertical direction.

[0019] Beneficial effect: Facilitates quick positioning and installation of the stop ring positioning seat.

[0020] Furthermore, the stop ring positioning seat is provided with a guide groove extending in the vertical direction, and the base is provided with a guide hole corresponding to the guide groove, and a guide member for extending into the guide groove is inserted into the guide hole.

[0021] Beneficial effect: The guide ensures the correct orientation of the lateral opening, facilitating the subsequent positioning and placement of the piston rod.

[0022] Furthermore, the base is a split structure, including a bottom seat, a raised block, and a mounting block arranged separately. The raised block is detachably connected to the bottom seat, and the mounting block is detachably connected to the raised block. The lateral opening is located on the same side of the bottom seat, the raised block, and the mounting block.

[0023] Beneficial effect: The split base is easy to process and manufacture.

[0024] Furthermore, the shim block and the bottom seat body, and the shim block and the mounting block are slidably assembled along the radial direction of the piston rod on one side of the lateral opening. The shim block is provided with a side fixing hole for fixing the mounting block on the side opposite to the lateral opening, and the bottom of the bottom seat body is provided with a bottom fixing hole for fixing the shim block.

[0025] Beneficial effect: Facilitates the assembly and disassembly of various components.

[0026] Furthermore, it also includes a clamping guide seat located below the piston rod positioning seat. The clamping guide seat is connected to the base. The clamping guide seat has a through hole coaxial with the piston positioning groove. The through hole is used for the output end of the clamping mechanism to pass through, so that the piston rod positioning seat clamps the piston rod under the action of the clamping mechanism.

[0027] Beneficial effect: It helps to achieve the clamping of the piston rod, thereby ensuring that the piston rod does not easily move during spot welding.

[0028] Furthermore, a bushing is coaxially provided inside the piston rod positioning seat, and an insertion hole for inserting the piston rod is provided on the bushing.

[0029] Beneficial effects: The bushing protects the surface of the piston rod and reduces friction between the piston rod and the piston rod locating seat.

[0030] The vibration damper piston rod stop ring spot welding device provided by this utility model adopts the following technical solution:

[0031] A shock absorber piston rod stop ring spot welding device includes a pressing mechanism for pressing the piston rod and stop ring downwards, a pressing mechanism for pressing the piston rod upwards, and a positioning mechanism for spot welding the shock absorber piston rod stop ring. The positioning mechanism for spot welding the shock absorber piston rod stop ring includes a base, a stop ring positioning seat, a spring limiting mechanism, and a piston rod positioning seat. The base has a lateral opening extending in the vertical direction. The stop ring positioning seat is disposed within the lateral opening and has a lateral opening and a stopping positioning surface. The stopping positioning surface is located above the lateral opening and is used to stop and cooperate with the stop ring. The lateral opening and the lateral opening are located on the lateral opening. The diameter of the through-hole and the lateral opening is not greater than the minimum diameter of the lateral opening, for the piston rod to be inserted and removed radially; the spring limiting mechanism includes two pawls and a spring connected to the same end of the two pawls, each pawl is rotatably mounted on the base, and in the natural state, the main body of the two pawls forms a guide port and a limiting port, the limiting port is vertically opposite to the lateral opening, and the piston rod is inserted into the lateral opening and the limiting port through the guide port; the piston rod positioning seat is provided with a piston rod positioning groove for the piston rod to be inserted, and the top of the piston rod positioning seat is used to stop and cooperate with the step on the piston rod.

[0032] The beneficial effects of the shock absorber piston rod stop ring spot welding device are as follows: During use, the piston rod with the stop ring fitted is inserted from one side of the guide port through the lateral opening into the position of the limiting port and the lateral opening. The lower end of the piston rod is inserted into the piston rod positioning seat, and the step of the piston rod makes stop contact with the piston rod positioning seat. The stop ring is positioned on the stop ring positioning seat through the stop positioning surface, realizing the rapid positioning of the piston rod and the stop ring and improving the positioning efficiency of the piston rod and the stop ring. The piston rod and the stop ring are stably pressed by the clamping mechanism and the top clamping mechanism, and then welding can be performed. After welding is completed, simply open the guide port and pull the bottom end of the piston rod out of the piston rod positioning seat. The piston rod and the stop ring can then be quickly pulled out from the lateral opening. The entire positioning and disassembly process is simple and fast, ensuring welding efficiency.

[0033] Furthermore, each pawl has a V-shaped limiting surface and a guide ramp. The distance between the guide ramps of the two pawls gradually decreases in the radial direction of the piston rod from the direction away from the lateral opening to the direction closer to the lateral opening. The minimum diameter of the guide opening is smaller than the diameter of the piston rod inserted into the lateral opening.

[0034] Beneficial effects: The V-shaped limiting surface facilitates the centering of the piston rod and prevents it from wobbling back and forth; when the piston rod is inserted from the guide port, it will squeeze the two spring claws, causing them to open and then enter the limiting port and the side opening through the guide port, making operation more convenient.

[0035] Furthermore, the spring claw includes a mounting part and a main body part. The V-shaped limiting surface and the guide slope are both located on the main body part. The mounting part is rotatably assembled with the base, and the spring is fixed between the mounting parts of the two spring claws. The main body part and the mounting part are detachably connected.

[0036] Beneficial effects: When the main body is damaged, it can be removed and replaced from the mounting part without replacing the entire spring limiting mechanism; in addition, different sizes of main bodies can be replaced to limit piston rods of different diameters.

[0037] Furthermore, the stop ring positioning seat is detachably connected to the base.

[0038] Beneficial effect: The stop ring positioning seat with different sizes of side openings can be replaced to position piston rods of different diameters.

[0039] Furthermore, the base is provided with an installation groove that is adapted to the stop ring positioning seat, and the bottom of the installation groove is used to stop the stop ring positioning seat in the vertical direction.

[0040] Beneficial effect: Facilitates quick positioning and installation of the stop ring positioning seat.

[0041] Furthermore, the stop ring positioning seat is provided with a guide groove extending in the vertical direction, and the base is provided with a guide hole corresponding to the guide groove, and a guide member for extending into the guide groove is inserted into the guide hole.

[0042] Beneficial effect: The guide ensures the correct orientation of the lateral opening, facilitating the subsequent positioning and placement of the piston rod.

[0043] Furthermore, the base has a split structure, including a bottom seat, a raised block, and a mounting block arranged separately. The raised block is detachably connected to the bottom seat, and the mounting block is detachably connected to the raised block. The lateral opening is provided on the mounting block.

[0044] Beneficial effect: The split base is easy to process and manufacture.

[0045] Furthermore, the shim block and the bottom seat body, and the shim block and the mounting block are slidably assembled along the radial direction of the piston rod on one side of the lateral opening. The shim block is provided with a side fixing hole for fixing the mounting block on the side opposite to the lateral opening, and the bottom of the bottom seat body is provided with a bottom fixing hole for fixing the shim block.

[0046] Beneficial effect: Facilitates the assembly and disassembly of various components.

[0047] Furthermore, it also includes a clamping guide seat located below the piston rod positioning seat. The clamping guide seat is connected to the base. The clamping guide seat has a through hole coaxial with the piston positioning groove. The through hole is used for the output end of the clamping mechanism to pass through, so that the piston rod positioning seat clamps the piston rod under the action of the clamping mechanism.

[0048] Beneficial effect: It helps to achieve the clamping of the piston rod, thereby ensuring that the piston rod does not easily move during spot welding.

[0049] Furthermore, a bushing is coaxially provided inside the piston rod positioning seat, and an insertion hole for inserting the piston rod is provided on the bushing.

[0050] Beneficial effects: The bushing protects the surface of the piston rod and reduces friction between the piston rod and the piston rod locating seat. Attached Figure Description

[0051] Figure 1 This is a three-dimensional structural diagram of the positioning mechanism for spot welding the piston rod stop ring of the shock absorber according to this utility model. Figure 1 ;

[0052] Figure 2 for Figure 1 The diagram shows a three-dimensional structure of the positioning mechanism for spot welding the piston rod stop ring of the shock absorber according to this utility model. Figure 2 ;

[0053] Figure 3This is the front view of the positioning mechanism for spot welding the piston rod stop ring of the shock absorber according to this utility model.

[0054] Figure 4 This is a top view of the positioning mechanism for spot welding the piston rod stop ring of the shock absorber according to this utility model;

[0055] Figure 5 for Figure 4 AA section view;

[0056] Figure 6 A three-dimensional structural diagram of the spring limiting mechanism;

[0057] Figure 7 for Figure 6 Top view;

[0058] Figure 8 A schematic diagram of the three-dimensional structure of the base;

[0059] Figure 9 This is a three-dimensional structural diagram of the stop coil positioning seat.

[0060] Explanation of reference numerals in the attached figures:

[0061] 1. Base; 11. Bottom seat; 12. Elevating block; 13. Mounting block; 131. Guide hole; 132. Mounting groove; 14. Side opening; 2. Stop ring positioning seat; 21. Side opening; 22. Guide groove; 3. Spring limiting mechanism; 31. Mounting part; 311. Short shaft; 312. Rotating shaft; 32. Main body; 321. V-shaped limiting surface; 322. Guide slope; 323. Limiting port; 324. Guide port; 33. Spring; 4. Piston rod positioning seat; 41. Large diameter section; 42. Small diameter section; 43. Bushing; 44. Piston rod positioning groove; 5. Tightening guide seat; 51. Through hole; 6. Piston rod; 7. Stop ring; 8. Connecting rod; 9. Support. Detailed Implementation

[0062] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0063] An embodiment of the positioning mechanism for spot welding the piston rod stop ring of the shock absorber provided by this utility model:

[0064] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the positioning mechanism for spot welding the piston rod stop ring of the shock absorber includes a base 1, a stop ring positioning seat 2, a spring limiting mechanism 3, a piston rod positioning seat 4, and a clamping guide seat 5.

[0065] Specifically, base 1 has a split structure, such as Figure 8As shown, the device comprises a bottom base 11, a raised block 12, and a mounting block 13, arranged sequentially from bottom to top. The bottom base 11 has a positioning mounting groove, into which the raised block 12 is placed. The bottom of the bottom base 11 has a bottom fixing hole through which a bolt for fixing the raised block 12 passes, thus detachably assembling the raised block 12 and the bottom base 11. The raised block 12 has a stepped structure with a sliding mounting opening on one side, into which the mounting block 13 is inserted. The raised block 12 has a side fixing hole on the side facing away from the sliding mounting opening, into which a bolt for fixing the mounting block 13 passes, thus detachably assembling the mounting block 13 and the raised block 12.

[0066] The bottom base 11, the raising block 12, and the mounting block 13 all have through-holes 14 on the same side, such as... Figure 2 As shown, the lateral opening 14 allows the piston rod 6 to be inserted into or removed from the side of the base 1. When the aforementioned bolts are removed, the shim block 12 can slide laterally out of the bottom seat 11, and the mounting block 13 can slide laterally out of the shim block 12.

[0067] like Figure 2 As shown, the retaining ring positioning seat 2 is disposed in the lateral opening 14 and assembled in the mounting block 13, as... Figure 8 As shown, the mounting block 13 is provided with a mounting groove 132 that is adapted to the stop ring positioning seat 2. The bottom of the mounting groove 132 is used to stop the stop ring positioning seat 2 in the vertical direction. The stop ring positioning seat 2 can be quickly positioned and assembled into the mounting block 13 through the mounting groove 132. Figure 9 As shown, the stop ring positioning seat 2 has a side opening 21, which is U-shaped and faces the same direction as the side opening 14, and is vertically connected to the side opening 14. The diameter of the side opening 21 is smaller than the minimum diameter of the side opening 14. The top surface of the stop ring positioning seat 2 forms a stop positioning surface, which is located above the side opening 14 and is used to stop and cooperate with the stop ring 7. The piston rod 6 can be inserted into the side opening 21 from the side opening 14, and the stop ring 7 is sleeved on the piston rod 6 and slides down to the stop positioning surface, thus positioning the stop ring 7. It should be noted that the diameter of the side opening 21 is larger than the diameter of the piston rod 6 when inserted.

[0068] like Figure 9 As shown, the retaining ring positioning seat 2 is provided with a guide groove 22 extending in the vertical direction, such as... Figure 1 As shown, the mounting block 13 is provided with a guide hole 131 corresponding to the guide groove 22. A guide member for extending into the guide groove 22 is inserted into the guide hole 131 to ensure that the side opening 21 on the stop ring positioning seat 2 is oriented accurately when it is installed.

[0069] like Figure 5As shown, the spring limiting mechanism 3 is located below the entire base 1, as... Figure 6 and Figure 7 As shown, the device includes two symmetrically arranged spring claws and a spring 33 connected to the same end of the two spring claws. Each spring claw includes a mounting part 31 and a main body 32. The mounting part 31 is rotatably assembled to the bottom seat 11 via a rotating shaft 312. The mounting part 31 also has a short shaft 311, the axis of which is perpendicular to the axis of the rotating shaft 312. The spring 33 is sleeved on the two short shafts 311, and its two ends are fixed to the two mounting parts 31 respectively. The main body 32 is detachably fixed to the mounting part 31 by bolts. The main body 32 has a V-shaped limiting surface 321 and a guide slope 322. In its natural state, the two V-shaped limiting surfaces 321 form a limiting opening 323, which is vertically opposite to the side opening 21. The limiting opening 323 can straighten the piston rod 6, keeping it centered and preventing it from tilting. A guide opening 324 is formed between the two guide ramps 322. The distance between the guide ramps 322 of the two spring claws gradually decreases in the radial direction of the piston rod 6 from the direction away from the lateral opening 14 toward the direction closer to the lateral opening 14. The minimum diameter of the guide opening 324 is smaller than the diameter of the portion of the piston rod 6 that is inserted into the lateral opening 21.

[0070] like Figure 5 As shown, the piston rod positioning seat 4 is located below the spring limiting mechanism 3. The piston rod positioning seat 4 is T-shaped, including a large-diameter section 41 at the top and a small-diameter section 42 at the bottom. In actual use, the piston rod positioning seat 4 is mounted on a support 9. The small-diameter section 42 passes downward through the support, while the large-diameter section 41 is stopped and engaged with the top surface of the support. The large-diameter section 41 and the small-diameter section 42 are provided with piston rod positioning grooves 44 that are open vertically for the piston rod 6 to be inserted. A bushing 43 is coaxially provided inside the large-diameter section 41, and the bushing 43 is provided with an insertion hole for the piston rod 6 to be inserted.

[0071] like Figure 2As shown, the clamping guide seat 5 is located below the piston rod positioning seat 4 and is connected to the base 1 via multiple connecting rods 8. The clamping guide seat 5 has a through hole 51 coaxial with the piston rod positioning groove 44. Depending on the length of the piston rod 6, the lower end of the piston rod 6 is inserted into the aforementioned through hole and extends into the piston rod positioning groove 44. In actual use, a clamping mechanism needs to be installed below the clamping guide seat 5, and a pressing mechanism needs to be installed above the stop ring positioning seat 2. The clamping mechanism uses a servo electric cylinder, whose output rod passes through the aforementioned through hole 51 and abuts against the bottom of the small-diameter section 42. When the servo electric cylinder extends, it lifts the piston rod positioning seat 4 upwards, causing the top of the piston rod positioning seat 4, i.e., the top of the large-diameter section 41, to engage with the step on the piston rod 6 and clamp the piston rod 6. The clamping mechanism can be a cylinder-driven pressing block that moves up and down. The pressing block has a positioning hole in the center that matches the top of the piston rod 6. Multiple clamping claws are arranged around the positioning hole on the pressing block to clamp the stop ring.

[0072] The method of using the positioning mechanism for spot welding the piston rod stop ring of the shock absorber of this utility model is as follows:

[0073] The piston rod is placed into the guide port 324 and pushed inward toward the limiting port 323. At this time, the piston rod 6 presses against the two guide ramps 322, causing the two spring claws to open, allowing the piston rod 6 to enter the limiting port 323 and simultaneously engage with the stop ring positioning seat 2 from the side opening 21. At this time, the spring 33 returns to its original position, the two spring claws retract, and the piston rod 6 is centered at the limiting port 323. The lower end of the piston rod 6 is inserted into the piston rod positioning seat 4, and the step on the piston rod 6 abuts against the top of the piston rod positioning seat 4. The stop ring 7 is fitted onto the piston rod 6 and moves downward to the top of the stop ring positioning seat 2 to achieve positioning of the stop ring 7. After positioning, the pressure block moves down, and the pressure claws on the pressure block press down to tighten the stop ring 7, while the top of the piston rod 6 enters the positioning hole and abuts against the pressure block. The tightening mechanism then tightens the piston rod 6 from bottom to top to ensure the stability of the piston rod 6 and the stop ring 7 during welding.

[0074] After welding is completed, the clamping mechanism and the top clamping mechanism are removed, and the piston rod is manually pulled out from the piston rod positioning seat 4. The piston rod 6 and the stop ring 7 can be pulled out from the side opening by opening the spring claw.

[0075] This invention enables rapid positioning of the piston rod and the retaining ring, with simple positioning operation and high positioning efficiency.

[0076] In other embodiments, the base may also be a one-piece structure.

[0077] In other embodiments, the stop ring positioning seat can also be fixed on the base, in which case the diameter of the lateral opening is fixed, allowing for positioning welding of piston rods and stop rings of specific sizes.

[0078] An embodiment of the vibration damper piston rod stop ring spot welding device of this utility model:

[0079] The damper piston rod stop ring spot welding device includes a pressing mechanism for pressing the piston rod and stop ring downwards, a pressing mechanism for pressing the piston rod upwards, and a positioning mechanism for spot welding the damper piston rod stop ring. The structure of the positioning mechanism for spot welding the damper piston rod stop ring is the same as that in the above embodiment of the positioning mechanism for spot welding the damper piston rod stop ring, and will not be described in detail here.

[0080] The clamping mechanism uses a servo electric cylinder, whose output rod passes through the through hole 51 on the clamping guide seat and abuts against the bottom of the small diameter section 42. When the servo electric cylinder extends, it lifts the piston rod positioning seat 4 upward, so that the top of the piston rod positioning seat 4, that is, the top of the large diameter section 41, engages with the step stop on the piston rod 6 and clamps the piston rod 6. The pressing mechanism can be a cylinder-driven pressing block that moves up and down. The pressing block has a positioning hole in the center that matches the top of the piston rod 6, and multiple pressure claws are arranged around the positioning hole on the pressing block to clamp the stop ring.

[0081] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A positioning mechanism for spot welding of a damper piston rod retainer ring, characterized by Includes a base, a retaining ring positioning seat, a spring limiting mechanism, and a piston rod positioning seat; The base is provided with a lateral opening extending in the vertical direction. The stop ring positioning seat is disposed in the lateral opening. The stop ring positioning seat has a lateral opening and a stop positioning surface. The stop positioning surface is located above the lateral opening and is used to stop and cooperate with the stop ring. The lateral opening and the lateral opening are vertically connected and the diameter of the lateral opening is not greater than the minimum diameter of the lateral opening, so as to allow the piston rod to be inserted and removed along its radial direction. The spring limiting mechanism includes two spring claws and a spring connected to the same end of the two spring claws. Each spring claw is rotatably mounted on the base. In its natural state, the spring forms a guide port and a limiting port between the two spring claws. The limiting port is vertically opposite to the side opening. The piston rod is inserted into the side opening and the limiting port through the guide port. The piston rod positioning seat is provided with a piston rod positioning groove for the piston rod to be inserted, and the top of the piston rod positioning seat is used to engage with the step on the piston rod for a stop.

2. The shock absorber piston rod check ring spot weld positioning mechanism of claim 1, wherein, Each pawl has a V-shaped limiting surface and a guide ramp. The distance between the guide ramps of the two pawls gradually decreases in the radial direction of the piston rod from the direction away from the lateral opening to the direction closer to the lateral opening. The minimum diameter of the guide opening is smaller than the diameter of the piston rod inserted into the lateral opening.

3. The shock absorber piston rod check ring spot weld positioning mechanism of claim 2, wherein, The spring claw includes a mounting part and a main body part. The V-shaped limiting surface and the guide slope are both located on the main body part. The mounting part is rotatably assembled with the base. The spring is fixed between the mounting parts of the two spring claws. The main body part and the mounting part are detachably connected.

4. The positioning mechanism for spot welding of a piston rod check ring of a shock absorber according to any one of claims 1 to 3, characterized in that The stop ring positioning seat is detachably connected to the base.

5. The shock absorber piston rod check ring spot weld positioning mechanism of claim 4, wherein, The base is provided with an installation groove that is adapted to the stop ring positioning seat. The bottom of the installation groove is used to stop the stop ring positioning seat in the vertical direction.

6. The shock absorber piston rod check ring spot weld positioning mechanism of claim 5, wherein, The stop ring positioning seat is provided with a guide groove extending in the vertical direction, and the base is provided with a guide hole corresponding to the guide groove, and a guide member for extending into the guide groove is inserted into the guide hole.

7. The shock absorber piston rod check ring spot weld positioning mechanism according to any one of claims 1-3, characterized in that The base is a split structure, including a bottom seat, a raised block, and a mounting block arranged separately. The raised block is detachably connected to the bottom seat, and the mounting block is detachably connected to the raised block. The lateral opening is located on the same side of the bottom seat, the raised block, and the mounting block.

8. The shock absorber piston rod check ring spot weld positioning mechanism of claim 7, wherein, The shim block and the bottom seat body, and the shim block and the mounting block are slidably assembled along the radial direction of the piston rod on one side of the lateral opening. The shim block is provided with a side fixing hole for fixing the mounting block on the side opposite to the lateral opening. The bottom of the bottom seat body is provided with a bottom fixing hole for fixing the shim block.

9. The shock absorber piston rod check ring spot weld positioning mechanism according to any one of claims 1-3, characterized in that, It also includes a clamping guide seat located below the piston rod positioning seat. The clamping guide seat is connected to the base. The clamping guide seat has a through hole coaxial with the piston positioning groove. The through hole is used for the output end of the clamping mechanism to pass through, so that the piston rod positioning seat clamps the piston rod under the action of the clamping mechanism.

10. A spot welding device for the piston rod stop ring of a shock absorber, characterized in that, It includes a pressing mechanism for pressing the piston rod and the stop ring downwards, a pressing mechanism for pressing the piston rod upwards, and a positioning mechanism for spot welding the stop ring of the shock absorber piston rod as described in any one of claims 1-9.

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