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

Abstract

The invention 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] The present invention belongs to the technical field of shock absorber parts, and particularly relates to a positioning mechanism and a spot welding device for spot welding a stop ring of a shock absorber piston rod. Background Art

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

[0003] The Chinese utility model patent with the authorization announcement number CN210498775U discloses a spot welding positioning tool for the piston rod stop ring. It is composed of two half buckle bodies arranged symmetrically. The buckle body includes a semi-cylindrical main body, a stop ring positioning seat located at the upper part of the main body, and a piston rod positioning seat located at the lower part of the main body. There is a main body cavity inside the main body. The stop ring positioning seat is composed of a semi-circular cone positioning head and an upper seat body which are integrally arranged. A piston rod upper positioning through groove coaxial with the main body cavity is provided at the central part of its buckling surface. The piston rod positioning seat is composed of a semi-circular cylindrical positioning head and a lower seat body which are integrally arranged. A piston rod lower positioning through groove coaxial with the main body cavity is provided at the central part of its buckling surface. The semi-circular bottom surface of the lower seat body is consistent with the semi-circular diameter of the connecting end surface of the main body. A baffle is provided on the bottom end surface of the cylindrical positioning head, and the two are connected by bolts. When in use, the piston rod is placed in the piston rod upper positioning through groove of the stop ring positioning seat and the piston rod lower positioning through groove of the piston rod positioning seat. The bottom of the piston rod contacts the baffle on the piston rod positioning seat. After the other half buckle body is buckled, the stop ring is then passed through the piston rod and buckled on the upper cone positioning head of the stop ring positioning seat, and then the connecting part of the piston rod and the stop ring can be directly welded.

[0004] When the above-mentioned spot welding positioning tool for the piston rod stop ring positions the piston rod and the stop ring, it is necessary to buckle the two half buckle bodies arranged symmetrically and connect them together through the baffle. After welding, it is necessary to first remove the baffle and separate the two buckle bodies before the welded piston rod and stop ring can be taken out, and the operation is relatively cumbersome and the positioning efficiency is low. Summary of the Invention

[0005] The purpose of the present invention is to provide a positioning mechanism and a spot welding device for spot welding a stop ring of a shock absorber piston rod, so as to solve the technical problems of low positioning efficiency and relatively cumbersome operation of the existing spot welding positioning tool for the piston rod stop ring.

[0006] To solve the above problems, the positioning mechanism for spot welding a stop ring of a shock absorber piston rod provided by the present invention adopts the following technical solutions: The positioning mechanism for spot welding a stop ring of a shock absorber piston rod includes a base, a stop 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, and the stop ring positioning seat is arranged 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 for stop cooperation with the stop ring. The lateral opening is vertically communicated with the lateral opening and the caliber of the lateral opening is not greater than the minimum aperture of the lateral opening, and is used for allowing the piston rod to be inserted and taken out 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 assembled on the base. In the natural state of the spring, a guiding opening and a limiting opening are formed between the main body parts of the two spring claws. The limiting opening is vertically opposite to the lateral opening, and the piston rod is placed at the lateral opening and the limiting opening through the guiding opening; 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 for stop cooperation with the step on the piston rod.

[0007] The beneficial effect of the positioning mechanism for spot welding the stop ring of the shock absorber piston rod is that: when the present invention is in use, the piston rod sleeved with the stop ring is clamped into the position of the limiting opening and the lateral opening through the lateral opening from one side of the guiding opening. The lower end of the piston rod is inserted into the piston rod positioning seat, and the step of the piston rod is in stop contact with the piston rod positioning seat, while 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. After welding is completed, only need to open the guiding opening, pull out the bottom end of the piston rod from the piston rod positioning seat, and the piston rod together with the stop ring can be quickly pulled out from the lateral opening. The whole positioning process and disassembly process are simple and fast, ensuring the welding efficiency.

[0008] Further, each spring claw has a V-shaped limiting surface and a guiding inclined surface. The distance between the guiding inclined surfaces of the two spring claws gradually decreases in the radial direction of the piston rod from the direction away from the lateral opening to the direction close to the lateral opening, and the minimum caliber of the guiding opening is smaller than the diameter of the part of the piston rod placed in the lateral opening.

[0009] Beneficial effect: The V-shaped limiting surface is adopted to facilitate the centering of the piston rod and prevent the piston rod from shaking back and forth; when the piston rod is placed from the guiding opening, it will squeeze the two spring claws, causing the two spring claws to open, and then the piston rod can enter the limiting opening and the lateral opening through the guiding opening, making the operation more convenient.

[0010] Further, the spring claw includes a mounting part and a main body part. The V-shaped limiting surface and the guiding inclined surface 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.

[0011] Beneficial effects: When the main body is damaged, it can be disassembled and replaced from the installation part without replacing the entire spring limiting mechanism. In addition, the main body of different sizes can also be replaced to limit the piston rods of different diameters.

[0012] Furthermore, the stop ring positioning seat is detachably connected to the base.

[0013] Beneficial effects: Stop ring positioning seats with different sizes of lateral openings can be replaced to position piston rods of different diameters.

[0014] Furthermore, an installation chute adapted to the stop ring positioning seat is provided on the base, and the bottom of the installation chute is used for sliding cooperation with the stop ring positioning seat in the up and down direction.

[0015] Beneficial effects: Facilitate the quick positioning and installation of the stop ring positioning seat.

[0016] Furthermore, a guiding groove extending in the up and down direction is provided on the stop ring positioning seat, a guiding hole corresponding to the guiding groove is provided on the base, and a guiding member for extending into the guiding groove is arranged in the guiding hole.

[0017] Beneficial effects: The guiding member can ensure the correct orientation of the lateral opening, so as to position and place the subsequent piston rod correctly.

[0018] Furthermore, the base is of a split structure, including a bottom seat body, a heightening block and an installation block arranged separately. The heightening block is detachably connected to the bottom seat body, the installation block is detachably connected to the heightening block, and the lateral opening is arranged on the same side of the bottom seat body, the heightening block and the installation block.

[0019] Beneficial effects: The split base is convenient for processing and manufacturing.

[0020] Furthermore, between the heightening block and the bottom seat body, and between the heightening block and the installation block, they are slidably assembled along the radial direction of the piston rod on the side of the lateral opening. The heightening block is provided with a side fixing hole for fixing the installation block on the side back to the lateral opening, and the bottom of the bottom seat body is provided with a bottom fixing hole for fixing the heightening block.

[0021] Beneficial effects: Facilitate the assembly and disassembly between components.

[0022] Furthermore, it further includes a tightening guiding seat located below the piston rod positioning seat. The tightening guiding seat is connected to the base. A through hole coaxial with the piston positioning groove is provided on the tightening guiding seat, and the through hole is used for the output end of the tightening mechanism to pass through, so as to make the piston rod positioning seat tighten the piston rod under the action of the tightening mechanism.

[0023] Beneficial effects: It is beneficial to realize the pressing of the piston rod, and further ensure that the piston rod does not move easily during spot welding.

[0024] Further, a bushing is coaxially arranged inside the piston rod positioning seat, and a jack for inserting the piston rod is formed on the bushing.

[0025] Beneficial effects: The bushing can protect the surface of the piston rod and reduce the friction between the piston rod and the piston rod positioning seat.

[0026] The shock absorber piston rod stop ring spot welding device provided by the present invention adopts the following technical solution: The shock absorber piston rod stop ring spot welding device includes a pressing mechanism for pressing the piston rod and the stop ring downward, a jacking mechanism for jacking the piston rod upward, 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; a laterally opened hole extending in the vertical direction is provided on the base, the stop ring positioning seat is arranged in the laterally opened hole, the stop ring positioning seat has a lateral opening and a stop positioning surface, the stop positioning surface is located above the laterally opened hole and is used for stop cooperation with the stop ring, the lateral opening is vertically communicated with the laterally opened hole and the diameter of the lateral opening is not greater than the minimum diameter of the laterally opened hole, and is used for the piston rod to be inserted and taken out 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 rotationally assembled on the base, in the natural state of the spring, a guiding opening and a limiting opening are formed between the main bodies of the two spring claws, the limiting opening is vertically opposite to the lateral opening, and the piston rod is placed at the lateral opening and the limiting opening through the guiding opening; a piston rod positioning groove for inserting the piston rod is provided on the piston rod positioning seat, and the top of the piston rod positioning seat is used for stop cooperation with the step on the piston rod.

[0027] The beneficial effects of the shock absorber piston rod stop ring spot welding device are as follows: During use, the piston rod sleeved with the stop ring is clamped into the position of the limiting opening and the lateral opening through the laterally opened hole from one side of the guiding opening, the lower end of the piston rod is inserted into the piston rod positioning seat, and the step of the piston rod is in stop contact with the piston rod positioning seat, while 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; by using the pressing mechanism and the jacking mechanism to stably press the piston rod and the stop ring, welding operations can be carried out. After welding is completed, only need to open the guiding opening, pull out the bottom end of the piston rod from the piston rod positioning seat, and the piston rod together with the stop ring can be quickly pulled out from the lateral opening. The whole positioning process and disassembly process are simple and fast, ensuring the welding efficiency.

[0028] Further, each spring claw has a V-shaped limiting surface and a guiding inclined surface, and the distance between the guiding inclined surfaces of the two spring claws gradually decreases in the radial direction of the piston rod from the direction away from the laterally opened hole to the direction close to the laterally opened hole, and the minimum diameter of the guiding opening is smaller than the diameter of the part of the piston rod inserted into the lateral opening.

[0029] Beneficial effects: The use of a V-shaped limiting surface facilitates the centering of the piston rod and prevents the piston rod from swaying back and forth; when the piston rod is inserted from the guiding opening, it will squeeze the two elastic claws, causing the two elastic claws to open, and then it can enter the limiting opening and the lateral opening through the guiding opening, making the operation more convenient.

[0030] Furthermore, the elastic claw includes a mounting portion and a main body portion. The V-shaped limiting surface and the guiding inclined surface are both located on the main body portion. The mounting portion is rotatably assembled with the base, and the spring is fixed between the mounting portions of the two elastic claws; the main body portion is detachably connected to the mounting portion.

[0031] Beneficial effects: When the main body portion is damaged, it can be disassembled and replaced from the mounting portion without replacing the entire spring limiting mechanism; in addition, the main body portion of different sizes can also be replaced to limit piston rods of different diameters.

[0032] Furthermore, the stop ring positioning seat is detachably connected to the base.

[0033] Beneficial effects: Stop ring positioning seats with different-sized lateral openings can be replaced to position piston rods of different diameters.

[0034] Furthermore, the base is provided with a mounting chute adapted to the stop ring positioning seat, and the bottom of the mounting chute is used for blocking and cooperating with the stop ring positioning seat in the vertical direction.

[0035] Beneficial effects: Facilitate the quick positioning and installation of the stop ring positioning seat.

[0036] Furthermore, the stop ring positioning seat is provided with a guiding groove extending in the vertical direction, and the base is provided with a guiding hole corresponding to the guiding groove. A guiding member for extending into the guiding groove is inserted into the guiding hole.

[0037] Beneficial effects: The guiding member can ensure that the orientation of the lateral opening is correct for subsequent positioning and placement of the piston rod.

[0038] Furthermore, the base is of a split structure, including a bottom seat body, a spacer block, and a mounting block that are separately arranged. The spacer block is detachably connected to the bottom seat body, and the mounting block is detachably connected to the spacer block. The lateral opening is provided on the mounting block.

[0039] Beneficial effects: The split base is convenient for processing and manufacturing.

[0040] Furthermore, between the spacer block and the bottom seat body, and between the spacer block and the mounting block, they are slidably assembled in the radial direction of the piston rod on the side of the lateral opening. The spacer block is provided with side fixing holes for fixing the mounting block on the side opposite to the lateral opening, and the bottom of the bottom seat body is provided with bottom fixing holes for fixing the spacer block.

[0041] Beneficial effects: Facilitate the assembly and disassembly between components.

[0042] Further, it further includes a tightening guide seat located below the piston rod positioning seat. The tightening guide seat is connected to the base. A through hole coaxial with the piston positioning groove is provided on the tightening guide seat, and the through hole is used for the output end of the tightening mechanism to pass through, so as to make the piston rod positioning seat tighten the piston rod under the action of the tightening mechanism.

[0043] Beneficial effects: Facilitate the pressing of the piston rod, and further ensure that the piston rod does not move easily during spot welding.

[0044] Further, a bushing is coaxially arranged in the piston rod positioning seat, and a jack for the piston rod to insert is provided on the bushing.

[0045] Beneficial effects: The bushing can protect the surface of the piston rod and reduce the friction between the piston rod and the piston rod positioning seat. Description of the drawings

[0046] Figure 1 Schematic perspective structure of the positioning mechanism for spot welding the shock absorber piston rod retaining ring of the present invention Figure 1 ; Figure 2 is Figure 1 Schematic perspective structure of the positioning mechanism for spot welding the shock absorber piston rod retaining ring of the present invention shown Figure 2 ; Figure 3 Front view of the positioning mechanism for spot welding the shock absorber piston rod retaining ring of the present invention; Figure 4 Top view of the positioning mechanism for spot welding the shock absorber piston rod retaining ring of the present invention; Figure 5 is Figure 4 A - A sectional view of; Figure 6 Schematic perspective structure diagram of the spring limiting mechanism; Figure 7 is Figure 6 Top view of; Figure 8 Schematic perspective structure diagram of the seat body; Figure 9 Schematic perspective structure diagram of the retaining ring positioning seat.

[0047] Description of reference numerals: 1. Base; 11. Bottom seat body; 12. Lifting block; 13. Mounting block; 131. Guide hole; 132. Mounting chute; 14. Lateral opening; 2. Stop ring positioning seat; 21. Lateral opening; 22. Guide groove; 3. Spring limiting mechanism; 31. Mounting part; 311. Short shaft; 312. Rotating shaft; 32. Main body part; 321. V-shaped limiting surface; 322. Guiding inclined surface; 323. Limiting opening; 324. Guiding opening; 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. Perforation; 6. Piston rod; 7. Stop ring; 8. Connecting rod; 9. Support. Detailed implementation mode

[0048] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0049] An embodiment of the positioning mechanism for spot welding the stop ring of the shock absorber piston rod provided by the present invention: As Figure 1 , Figure 2 , Figure 3 and Figure 4 shown, the positioning mechanism for spot welding the stop ring of the shock absorber piston rod includes a base 1, a stop ring positioning seat 2, a spring limiting mechanism 3, a piston rod positioning seat 4, and a tightening guide seat 5.

[0050] Specifically, the base 1 is a split structure. As Figure 8 shown, it includes a bottom seat body 11, a lifting block 12, and a mounting block 13 that are split and arranged in sequence from bottom to top. Among them, a positioning mounting groove is provided on the bottom seat body 11. The lifting block 12 is placed in the positioning mounting groove. A bottom fixing hole is provided at the bottom of the bottom seat body 11, and a bolt for fixing the lifting block 12 is passed through the bottom fixing hole, so that the lifting block 12 and the bottom seat body 11 can be detachably assembled together. The lifting block 12 is a stepped structure, and a sliding mounting opening is provided on one side thereof. The mounting block 13 is inserted into the sliding mounting opening. A side fixing hole is provided on the side of the lifting block 12 facing away from the sliding mounting opening, and a bolt for fixing the mounting block 13 is passed through the side fixing hole, so that the mounting block 13 and the lifting block 12 can be detachably assembled together.

[0051] The bottom seat body 11, the lifting block 12, and the mounting block 13 are all provided with a vertically penetrating lateral opening 14 on the same side. As Figure 2 shown, the lateral opening 14 allows the piston rod 6 to be inserted or removed laterally from the base 1. When the above bolts are removed, the lifting block 12 can slide out laterally from the bottom seat body 11, and the mounting block 13 can slide out laterally from the lifting block 12.

[0052] As Figure 2As shown, the stop ring positioning seat 2 is arranged in the lateral opening 14 and assembled in the mounting block 13. As Figure 8 shown, the mounting block 13 is provided with a mounting chute 132 adapted to the stop ring positioning seat 2, and the bottom of the mounting chute 132 is used for stop cooperation with the stop ring positioning seat 2 in the up and down directions. The stop ring positioning seat 2 can be quickly positioned and assembled in the mounting block 13 through the mounting chute 132. As Figure 9 shown, the stop ring positioning seat 2 is provided with a lateral opening 21, and the lateral opening 21 is a U-shaped opening, which has the same orientation as the lateral opening 14 and is vertically penetrated with the lateral opening 14; the diameter of the lateral opening 21 is smaller than the minimum aperture of the lateral opening 14. The top surface of the stop ring positioning seat 2 forms a stop positioning surface, and the stop positioning surface is located above the lateral opening 14 and is used for stop cooperation with the stop ring 7. The piston rod 6 can be inserted into the lateral opening 21 from the lateral opening 14, and the stop ring 7 is sleeved on the piston rod 6 and slides down to the above-mentioned stop positioning surface to realize the positioning of the stop ring 7. It should be noted that the diameter of the lateral opening 21 should be larger than the diameter of the part of the piston rod 6 inserted.

[0053] As Figure 9 shown, the stop ring positioning seat 2 is provided with a guide groove 22 extending in the up and down directions. As Figure 1 shown, the mounting block 13 is provided with a guide hole 131 corresponding to the guide groove 22, and a guide member for extending into the guide groove 22 is inserted into the guide hole 131 to ensure that the lateral opening 21 on the stop ring positioning seat 2 has an accurate orientation during installation.

[0054] As Figure 5 shown, the spring limiting mechanism 3 is arranged below the entire base 1. As Figure 6 and Figure 7As shown in the figure, it 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 portion 31 and a main body portion 32. The mounting portion 31 is rotationally assembled with the bottom seat body 11 through a rotating shaft 312. A short shaft 311 is also provided on the mounting portion 31, and the axis of the short shaft 311 is perpendicular to the axis of the rotating shaft 312. The spring 33 is sleeved on the two short shafts 311, and both ends are respectively fixed to the two mounting portions 31. The main body portion 32 is detachably fixed to the mounting portion 31 through bolts. A V-shaped limiting surface 321 and a guiding inclined surface 322 are provided on the main body portion 32. In the natural state of the spring 33, a limiting opening 323 is formed between the two V-shaped limiting surfaces 321, and the limiting opening 323 is vertically opposite to the lateral opening 21. The limiting opening 323 can straighten the piston rod 6, keep the piston rod 6 centered, and prevent the piston rod 6 from tilting. A guiding opening 324 is formed between the two guiding inclined surfaces 322. The distance between the guiding inclined surfaces 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 towards the direction close to the lateral opening 14, and the minimum diameter of the guiding opening 324 is smaller than the diameter of the part of the piston rod 6 inserted into the lateral opening 21.

[0055] As Figure 5 shown, the piston rod positioning seat 4 is located below the spring limiting mechanism 3. The piston rod positioning seat 4 is in a T shape and includes a large-diameter section 41 located above and a small-diameter section 42 located below. During actual use, the piston rod positioning seat 4 is installed on a support 9. The small-diameter section 42 passes through the support downward, while the large-diameter section 41 is in abutting fit with the top surface of the support. A piston rod positioning groove 44 for the piston rod 6 to insert is provided on the large-diameter section 41 and the small-diameter section 42 and communicates up and down. A bushing 43 is coaxially provided in the large-diameter section 41, and a jack for the piston rod 6 to insert is provided on the bushing 43.

[0056] As Figure 2 shown, the tightening and guiding seat 5 is located below the piston rod positioning seat 4 and is connected to the base 1 through multiple connecting rods 8. A through hole 51 coaxial with the piston rod positioning groove 44 is provided on the tightening and guiding seat 5. According to the length of the piston rod 6, the lower end of the piston rod 6 is inserted into the above-mentioned jack and extends into the piston rod positioning groove 44. During actual use, a tightening mechanism needs to be arranged below the tightening and guiding seat 5, and a pressing mechanism needs to be arranged above the stop ring positioning seat 2. The tightening mechanism uses a servo electric cylinder, and its output rod passes through the above-mentioned through hole 51 and abuts against the bottom of the small-diameter section 42. When the servo electric cylinder extends, the piston rod positioning seat 4 is jacked up, so that the top of the piston rod positioning seat 4, that is, the top of the large-diameter section 41, is in abutting fit with the step on the piston rod 6 and tightens the piston rod 6. The pressing mechanism can adopt the form of a cylinder driving a pressing block to move up and down. A positioning hole adapted to the top of the piston rod 6 is provided in the center of the pressing block, and multiple pressing claws for pressing the stop ring are arranged around the positioning hole on the pressing block.

[0057] The usage method of the positioning mechanism for spot welding the shock absorber piston rod stop ring of the present invention is as follows: Place the piston rod at the guiding opening 324 and push it inward towards the limiting opening 323. At this time, the piston rod 6 presses against the two guiding inclined surfaces 322, thereby causing the two elastic claws to open, enabling the piston rod 6 to enter the limiting opening 323 and simultaneously be inserted into the stop ring positioning seat 2 from the lateral opening 21. At this time, the spring 33 resets, and the two elastic claws retract, centering the piston rod 6 at the limiting opening 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; a stop ring 7 is sleeved on the piston rod 6, and the stop ring 7 moves downward to the top of the stop ring positioning seat 2 to achieve the positioning of the stop ring 7. After positioning, the above-mentioned pressing block moves downward, and the pressing claws on the pressing block press the stop ring 7 downward, while the top of the piston rod 6 enters the positioning hole and abuts against the pressing block, and the jacking mechanism jacks up the piston rod 6 from bottom to top to ensure the stability of the piston rod 6 and the stop ring 7 during welding.

[0058] After welding is completed, withdraw the pressing mechanism and the jacking mechanism, manually pull out the piston rod from the piston rod positioning seat 4, and open the elastic claws to pull out the piston rod 6 and the stop ring 7 from the side opening.

[0059] The present invention can achieve the rapid positioning of the piston rod and the stop ring, with simple positioning operation and high positioning efficiency.

[0060] In other embodiments, the base can also adopt an integral structure.

[0061] In other embodiments, the stop ring positioning seat can also be fixed on the base. At this time, the caliber of the lateral opening is fixed, and positioning welding can be performed on the piston rod and the stop ring of a specific size.

[0062] An embodiment of the spot welding device for the shock absorber piston rod stop ring of the present invention: The spot welding device for the shock absorber piston rod stop ring includes a pressing mechanism for pressing the piston rod and the stop ring downward, a jacking mechanism for jacking up the piston rod upward, and also includes a positioning mechanism for spot welding the shock absorber piston rod stop ring. The structure of the positioning mechanism for spot welding the shock absorber piston rod stop ring is the same as that in the embodiment of the positioning mechanism for spot welding the shock absorber piston rod stop ring described above, and will not be elaborated in detail here.

[0063] The jacking mechanism adopts a servo electric cylinder, and its output rod passes through the through hole 51 on the jacking guide seat and abuts against the bottom of the small diameter section 42. When the servo electric cylinder extends, it jacks up 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 on the piston rod 6 in a blocking manner and jacks up the piston rod 6. The pressing mechanism can adopt the form of a cylinder driving the pressing block to move up and down. A positioning hole adapted to the top of the piston rod 6 is provided in the center of the pressing block, and a plurality of pressing claws for pressing the stop ring are arranged around the positioning hole on the pressing block.

[0064] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. Positioning mechanism for spot welding of shock absorber piston rod stop ring, characterized in that It includes a base, a stop 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 arranged 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 for stop cooperation with the stop ring. The lateral opening is vertically communicated with the lateral opening and the caliber of the lateral opening is not greater than the minimum aperture of the lateral opening, and is used for the piston rod to be inserted and taken out 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 assembled on the base. In the natural state of the spring, a guiding opening and a limiting opening are formed between the two spring claws. The limiting opening is vertically opposite to the lateral opening. The piston rod is placed at the lateral opening and the limiting opening through the guiding opening; 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 for stop cooperation with the step on the piston rod.

2. The positioning mechanism for spot welding of the shock absorber piston rod stop ring according to claim 1, characterized in that Each spring claw has a V-shaped limiting surface and a guiding inclined surface. The distance between the guiding inclined surfaces of the two spring claws in the radial direction of the piston rod gradually decreases from the direction away from the lateral opening to the direction close to the lateral opening. The minimum caliber of the guiding opening is smaller than the diameter of the part of the piston rod placed in the lateral opening.

3. The positioning mechanism for spot welding of the shock absorber piston rod stop ring according to claim 2, characterized in that, The spring claw includes a mounting part and a main body part. The V-shaped limiting surface and the guiding inclined surface 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 the shock absorber piston rod stop ring according to any one of claims 1-3, characterized in that, The stop ring positioning seat and the base are detachably connected.

5. The positioning mechanism for spot welding of the shock absorber piston rod stop ring according to claim 4, characterized in that, The base is provided with a mounting chute adapted to the stop ring positioning seat. The bottom of the mounting chute is used for stop cooperation with the stop ring positioning seat in the vertical direction.

6. The positioning mechanism for spot welding of the shock absorber piston rod stop ring according to claim 5, characterized in that, The stop ring positioning seat is provided with a guiding groove extending in the vertical direction. The base is provided with a guiding hole corresponding to the guiding groove, and a guiding member for extending into the guiding groove is arranged in the guiding hole.

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

8. The positioning mechanism for spot welding of the shock absorber piston rod stop ring according to claim 7, characterized in that, The heightening block and the bottom seat body, and the heightening block and the mounting block are slidably assembled in the radial direction of the piston rod on one side of the lateral opening. The heightening block is provided with a side fixing hole for fixing the mounting block on the side facing away from the lateral opening, and the bottom of the bottom seat body is provided with a bottom fixing hole for fixing the heightening block.

9. The positioning mechanism for spot welding of the shock absorber piston rod stop ring according to any one of claims 1-3, characterized in that, It further includes a tightening and guiding seat located below the piston rod positioning seat. The tightening and guiding seat is connected to the base. A through hole coaxial with the piston positioning groove is opened on the tightening and guiding seat. The through hole is used for the output end of the tightening mechanism to pass through, so as to make the piston rod positioning seat tighten the piston rod under the action of the tightening mechanism.

10. Shock absorber piston rod stop ring spot welding device, characterized in that, It includes a pressing mechanism for pressing the piston rod and the stop ring downward, a tightening mechanism for tightening the piston rod upward, and a positioning mechanism for spot welding the shock absorber piston rod stop ring according to any one of claims 1-9.

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