Welding device for electric tricycle rear axle production

Abstract

The invention discloses a welding device for electric tricycle rear axle production, and relates to the field of tricycle rear axle welding, the welding device comprises a fixed base and a supporting frame fixedly mounted at the upper end of the fixed base, a supporting rod is fixedly mounted at the upper end of the supporting frame, and a moving assembly is slidably mounted on the outer side of the supporting rod; and a driving device is fixedly installed at one end of the supporting rod, a driving motor is fixedly installed on the outer side of the fixed base, an output shaft is fixedly installed at the output end of the driving motor, the output shaft is rotationally connected with the fixed base, the output shaft is located in the sliding groove, and the output shaft is in threaded connection with the sliding block. According to the welding device for production of the rear axle of the electro-tricycle, the driving motor drives the rotating shaft to rotate, the clamping piece can move upwards and get close to the rear axle, and therefore the rear axle is positioned and clamped, the fixing performance of the placing position of the rear axle is guaranteed, the rear axle is prevented from being inexpensive, and the welding accuracy of the rear axle is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of tricycle rear axle welding, in particular to a welding device for producing electric tricycle rear axles. Background Art

[0002] Electric tricycles are a common means of transportation. During the production of electric tricycles, welding devices are used to weld the rear axles of the electric tricycles to ensure the safety of the electric tricycles. However, the existing welding devices still have certain use defects during use.

[0003] Patent application publication number CN220761550U discloses a rear axle bridge tube welding device for electric tricycles. After the mobile device on the top of the mobile device fixing column is kept horizontal, the external welding device can be operated to weld the rear axle drive device and the mobile device. The overall device reduces the situation that after the mobile device is placed on the fixed platform body, the mobile device will tilt to one side due to the different weights at both ends of the mobile device, which will damage the welding effect of the rear axle of the tricycle and the mobile device. The overall device improves the stability of the rear axle of the tricycle and the mobile device during welding. Because the bottom of the extrusion curved column is a curved surface, the bottom of the extrusion curved column continuously squeezes the top of the mobile device. When the sliding column continues to move, the degree of squeezing of the outer wall of the mobile device by the extrusion fixed column continues to increase, thereby improving the stability when fixing mobile devices of different sizes.

[0004] Patent application announcement number CN218311652U discloses a welding device for electric tricycle production. A welding table is installed on the top of the bottom plate. When the device is in use, the worker can drive the screw to rotate by rotating the turntable. At this time, the two sets of threaded blocks can be driven to move in a direction close to each other. At this time, the two sets of side plates can be driven to move around the sliding rod. At this time, the two sets of side plates can clamp the welding object to prevent the welding position from shifting, thereby improving the accuracy of the device. A hollow plate is installed inside the shrinking tube. When the device is in use, the worker can pull the plug rod out of the shrinking tube by pulling the pull ring. At this time, the telescopic plate can be telescoped inside the shrinking tube to adjust the welding height of the welding head. When the height adjustment of the device is completed, the worker releases the pull ring to drive the limit plate and the plug rod to horizontally intersperse the telescopic plate to extend to the inside of the shrinking tube through the elastic potential energy of the spring, thereby fixing the height of the device and improving the stability of the device.

[0005] Patent application publication number CN213730179U discloses a welding device for electric tricycle production. The bottom plate is placed according to the height of the electric tricycle so that the placement position of the bottom plate matches the welding position of the electric tricycle. Since the front windshield is in an H shape and each of the four corners of the front windshield has a round head, the four heads of the front windshield are placed inside the fixing grooves on the opposite sides of the two clamping plates. Since the heights of the front windshields are different, when the front windshields are placed in the fixing grooves, the two clamping plates can be contracted and expanded by the action of the first spring, thereby clamping the front windshield, which is convenient for welding front windshields of different heights, and is efficient and convenient.

[0006] In the above-mentioned patents, the welding of the electric tricycle structure by the device is realized. However, the device disclosed in the above-mentioned patents still has the following problems. During the welding process of the device, the structure to be welded is directly placed on the upper end of the table for welding or welded after the transportation is completed. During the transportation process, the structure is easily moved due to vibration, resulting in a change in the placement state of the structure, which is easy to cause the welding state of the structure to be inconsistent with the initial state, affecting the welding accuracy of the device.

[0007] In view of the above problems, it is urgent to carry out innovative design based on the original welding device structure. Summary of the invention

[0008] The purpose of the present invention is to provide a welding device for the production of rear axles of electric tricycles, so as to solve the problem proposed in the above-mentioned background technology that the structure to be welded is directly placed on the upper end of the table for welding or is welded after the transportation is completed. During the transportation process, the structure is easily moved due to vibration, resulting in a change in the placement state of the structure, which is easy to cause the welding state of the structure to be inconsistent with the initial state, affecting the welding accuracy of the device.

[0009] To achieve the above-mentioned object, the present invention provides the following technical solutions: A welding device for producing rear axles of electric tricycles, comprising a fixed base and a support frame fixedly mounted on the upper end of the fixed base;

[0010] A support rod is fixedly installed on the upper end of the support frame, and a moving assembly is slidably installed on the outer side of the support rod, and a driving device is fixedly installed on one end of the support rod, an adjustment structure is arranged at the lower end of the moving assembly, and a welding head assembly is arranged at the lower end of the adjustment structure;

[0011] A slide groove is provided at the upper end of the fixed base, and a sliding block is slidably installed inside the slide groove, and a support plate is fixedly installed at the upper end of the sliding block, and a fixed bracket is fixedly installed at the upper end of the support plate;

[0012] A driving motor is fixedly installed on the outer side of the fixed base, and an output shaft is fixedly installed on the output end of the driving motor, and the output shaft is rotatably connected to the fixed base. The output shaft is located inside the sliding groove, and the output shaft is threadedly connected to the sliding block.

[0013] Preferably, a driving motor is fixedly mounted on the lower end of the support plate, and a rotating shaft is fixedly mounted on the output end of the driving motor, and the rotating shaft is rotatably connected to the lower end of the support plate.

[0014] Preferably, a lifting rod is slidably installed inside the support plate, and a lifting arc plate is fixedly installed on the upper end of the lifting rod, and the lifting arc plate and the upper end of the fixed bracket are both arc-shaped structures when viewed from the side.

[0015] Preferably, a threaded rod is installed on the internal thread of the lifting rod, and a bevel gear set is provided at the lower end of the threaded rod and the outer side of the rotating shaft, and the lifting rod, threaded rod and bevel gear set are provided in two groups symmetrically about the vertical center axis of the support plate, and the threaded rod is rotatably connected to the support plate.

[0016] Preferably, a moving part is slidably arranged inside the support plate, and a mounting shaft is rotatably mounted inside the upper end of the moving part, and a clamping part is threadedly mounted on the upper end of the mounting shaft, and the clamping part is slidably connected to the support plate.

[0017] Preferably, a pinion is fixedly mounted on the outer side of the mounting shaft, a fixed rack is fixedly mounted on the inner side of the support plate, and the fixed rack is meshingly connected with the pinion.

[0018] Preferably, a driving screw is rotatably mounted on the lower end of the support plate, and the driving screw is threadedly connected to the moving part, and the driving screw and the clamping part are correspondingly arranged, and a bevel gear set 2 is arranged on the outer side of the driving screw and the rotating shaft.

[0019] Preferably, the adjustment structure is provided with an electric push rod, an arc-shaped rotating part and a telescopic rod, the arc-shaped rotating part is rotatably mounted on the lower end of the moving component, and the telescopic rod is fixedly mounted on the lower end of the arc-shaped rotating part, and the telescopic rod is fixedly connected to the upper end of the welding head assembly.

[0020] Preferably, an electric push rod is rotatably mounted on the outer sides of the moving assembly and the arc-shaped rotating member, and the upper end of the arc-shaped rotating member is an arc-shaped structure when viewed from the front, and the upper end surface of the arc-shaped rotating member is tightly fitted with the lower end surface of the moving assembly.

[0021] Preferably, a moving groove is provided at the lower end of the moving component, and a locking piece is slidably installed inside the moving groove, and a reciprocating spring is fixedly installed at one end of the locking piece close to the moving groove, and a locking groove is provided at one end of the arc-shaped rotating part close to the moving component, and one end of the locking piece close to the locking groove is located inside the locking groove.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The driving motor drives the rotating shaft to rotate, so that the clamping part can move upward and approach the rear axle, thereby positioning and clamping the rear axle, ensuring the fixed position of the rear axle, avoiding the rear axle from being cheap, and ensuring the accuracy of the rear axle welding;

[0024] 2. By rotating the threaded rod, the lifting rod can drive the lifting arc block to move, so that the lifting arc block drives the rear axle to move. The lowering of the lifting arc block is convenient for clamping the rear axle, and the rising of the lifting arc block is convenient for removing the rear axle, which effectively improves the convenience of using the device;

[0025] 3. Furthermore, through the movement of the electric push rod, the electric push rod can push the arc-shaped rotating part to rotate at the lower end of the moving assembly, thereby changing the welding direction of the welding head assembly, facilitating the welding of the rear axle, and improving the overall convenience of using the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the three-dimensional structure of the support plate of the present invention;

[0028] Figure 3 It is a schematic diagram of the top view structure of the present invention;

[0029] Figure 4 It is a front view structural schematic diagram of the present invention;

[0030] Figure 5 It is a right view structural schematic diagram of the mobile assembly of the present invention;

[0031] Figure 6 It is a schematic diagram of the front cross-sectional structure of the arc-shaped rotating member of the present invention;

[0032] Figure 7 This is a schematic diagram of the front view structure of the support plate of the present invention;

[0033] Figure 8 It is a schematic diagram of the left cross-sectional structure of the support plate of the present invention;

[0034] Fig. 9 This is a bottom view of the structure of the support plate of the present invention;

[0035] Fig.10 For the present invention Figure 6 A in the figure is an enlarged structural diagram.

[0036] In the figure: 1. fixed base; 2. slide groove; 3. support frame; 4. support rod; 5. moving assembly; 6. driving device; 7. adjustment structure; 8. welding head assembly; 9. support plate; 10. driving motor; 11. output shaft; 12. fixed bracket; 13. driving motor; 14. rotating shaft; 15. lifting rod; 16. lifting arc plate; 17. sliding block; 18. threaded rod; 19. bevel gear set 1; 20. moving part; 21. mounting shaft; 22. clamping part; 23. fixed rack; 24. pinion; 25. driving screw; 26. bevel gear set 2; 27. electric push rod; 28. arc rotating part; 29. ​​telescopic rod; 30. moving groove; 31. engaging part; 32. reciprocating spring; 33. engaging groove. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Embodiment 1: This embodiment Figure 1-Figure 8 As shown, in order to solve the problem that the existing device is prone to shaking during transportation, the process of positioning the rear axle during transportation of the device is disclosed, and the specific contents are as follows:

[0039] A fixed base 1 and a support frame 3 fixedly mounted on the upper end of the fixed base 1;

[0040] A support rod 4 is fixedly mounted on the upper end of the support frame 3, and a moving assembly 5 is slidably mounted on the outer side of the support rod 4, and a driving device 6 is fixedly mounted on one end of the support rod 4, an adjustment structure 7 is arranged at the lower end of the moving assembly 5, and a welding head assembly 8 is arranged at the lower end of the adjustment structure 7;

[0041] A slide groove 2 is provided at the upper end of the fixed base 1, and a sliding block 17 is slidably installed inside the slide groove 2, and a support plate 9 is fixedly installed on the upper end of the sliding block 17, and a fixed bracket 12 is fixedly installed on the upper end of the support plate 9;

[0042] A driving motor 10 is fixedly installed on the outer side of the fixed base 1, and an output shaft 11 is fixedly installed on the output end of the driving motor 10, and the output shaft 11 is rotatably connected to the fixed base 1, the output shaft 11 is located inside the slide slot 2, and the output shaft 11 is threadedly connected to the sliding block 17;

[0043] A driving motor 13 is fixedly mounted on the lower end of the supporting plate 9, and a rotating shaft 14 is fixedly mounted on the output end of the driving motor 13, and the rotating shaft 14 is rotatably connected to the lower end of the supporting plate 9;

[0044] A lifting rod 15 is slidably mounted inside the support plate 9, and a lifting arc plate 16 is fixedly mounted on the upper end of the lifting rod 15, and the lifting arc plate 16 and the upper end of the fixed bracket 12 are both arc-shaped structures when viewed from the side;

[0045] A threaded rod 18 is installed on the internal thread of the lifting rod 15, and a bevel gear set 19 is provided at the lower end of the threaded rod 18 and the outer side of the rotating shaft 14. The lifting rod 15, the threaded rod 18 and the bevel gear set 19 are arranged in two groups symmetrically about the vertical center axis of the support plate 9, and the threaded rod 18 is rotatably connected to the support plate 9.

[0046] When using the welding device for producing the rear axle of the electric tricycle, the device is first placed at a position where work is required. After the device is placed at the required position, the device can be used to weld the rear axle of the electric tricycle. In this process, the rear axle of the electric tricycle needs to be placed on the upper end of the support plate 9, and the rear axle is located at the upper end of the fixed bracket 12 and the lifting arc plate 16. After the rear axle is placed, the rear axle can be positioned and transported to the lower end of the welding head assembly 8 for welding.

[0047] In the process of positioning the rear axle, the driving motor 13 needs to work and drive the rotating shaft 14 to rotate. During the rotation of the rotating shaft 14, the driving screw 25 is driven to rotate through the bevel gear set 26. The rotation of the driving screw 25 causes the moving member 20 to move on the outside of the driving screw 25, and the moving member 20 slides inside the support plate 9. During the movement of the moving member 20, the clamping member 22 is driven to slide inside the support plate 9 through the mounting shaft 21, and the clamping member 22 moves closer to the rear axle. The rear axle is also limited and clamped. During this process, the pinion 24 will move with the installation shaft 21 and rotate under the action of the fixed rack 23. The rotation of the pinion 24 will drive the installation shaft 21 to rotate, so that the installation shaft 21 drives the clamping member 22 to move upward, and the height of the clamping member 22 will change during the upward movement to ensure the stability of the rear axle clamping. At this point, the positioning process of the device for the rear axle is completed, which effectively avoids the movement of the rear axle during transportation, resulting in inaccurate welding, and ensures the accuracy of the rear axle welding.

[0048] Embodiment 2: This embodiment is as follows Figure 1-Figure 10 As shown, in order to solve the problem that the existing device is difficult to take and place, the process of lifting the rear axle by the device is disclosed, and the specific content is as follows:

[0049] A moving member 20 is slidably mounted inside the support plate 9, and a mounting shaft 21 is rotatably mounted inside the upper end of the moving member 20, and a clamping member 22 is threadedly mounted on the upper end of the mounting shaft 21, and the clamping member 22 is slidably connected to the support plate 9;

[0050] A pinion 24 is fixedly mounted on the outer side of the mounting shaft 21, and a fixed rack 23 is fixedly mounted on the inner side of the support plate 9, and the fixed rack 23 is meshedly connected with the pinion 24;

[0051] A drive screw 25 is rotatably mounted on the lower end of the support plate 9 , and the drive screw 25 is threadedly connected to the moving member 20 , and the drive screw 25 is correspondingly arranged with the clamping member 22 , and a bevel gear set 26 is arranged on the outer side of the drive screw 25 and the rotating shaft 14 .

[0052] In the process of positioning the rear axle by the device, the rotating shaft 14 drives the threaded rod 18 to rotate through the bevel gear set 19, and the threaded rod 18 rotates to make the lifting rod 15 move downward, and the movement of the lifting rod 15 drives the lifting arc plate 16 to move synchronously and move the lifting arc plate 16 downward, so that the rear axle can move downward and be in close contact with the clamping member 22;

[0053] Then the driving motor 10 will work and drive the output shaft 11 to rotate, and the rotation of the output shaft 11 will cause the sliding block 17 to slide inside the slide groove 2, and the sliding block 17 will drive the support plate 9 to slide synchronously on the upper end of the fixed base 1, and the support plate 9 will stop moving after moving to the lower end of the support rod 4, at this time, the welding head assembly 8 can weld the rear axle, and through the movement of the driving device 6, the moving assembly 5 can move on the upper end of the support rod 4, so as to facilitate the welding of the rear axle;

[0054] After welding is completed, the driving motor 10 will drive the output shaft 11 to continue to rotate, so that the support plate 9 continues to move on the upper end of the fixed base 1, and when the support plate 9 moves to the end of the fixed base 1 away from the driving motor 10, the driving motor 13 can drive the rotating shaft 14 to rotate in the opposite direction. At this time, the clamping member 22 can be moved to the initial position. At the same time, the lifting rod 15 will push the lifting arc plate 16 to move upward, so that the rear axle moves upward on the upper end of the support plate 9, which is convenient for removing the rear axle, and effectively improves the convenience of taking the rear axle.

[0055] Embodiment 3: This embodiment is as follows Figure 1-Figure 6 and Figure 8-Figure 10 As shown, in order to solve the problem of fixed welding angle of the existing welding device, a process of adjusting the welding angle of the device is disclosed, and the specific contents are as follows:

[0056] The adjustment structure 7 is provided with an electric push rod 27, an arc-shaped rotating member 28 and a telescopic rod 29. The arc-shaped rotating member 28 is rotatably mounted on the lower end of the moving assembly 5, and the telescopic rod 29 is fixedly mounted on the lower end of the arc-shaped rotating member 28, and the telescopic rod 29 is fixedly connected to the upper end of the welding head assembly 8;

[0057] The outer sides of the moving assembly 5 and the arc-shaped rotating member 28 are rotatably mounted with an electric push rod 27, and the upper end of the arc-shaped rotating member 28 is an arc-shaped structure when viewed from the front, and the upper end surface of the arc-shaped rotating member 28 is tightly fitted with the lower end surface of the moving assembly 5;

[0058] A moving groove 30 is provided at the lower end of the moving component 5, and a locking member 31 is slidably installed inside the moving groove 30, and a reciprocating spring 32 is fixedly installed at one end of the locking member 31 close to the moving groove 30, and a locking groove 33 is provided at one end of the arc-shaped rotating member 28 close to the moving component 5, and the end of the locking member 31 close to the locking groove 33 is located inside the locking groove 33.

[0059] During the process of welding the rear axle by the device, the output shaft 11 can be driven to rotate by the driving motor 10 to complete the front and rear welding of the rear axle, and the moving assembly 5 can be driven to move left and right by the driving device 6 to complete the left and right welding of the rear axle;

[0060] In addition, during the welding process, the arc-shaped rotating member 28 can be rotated at the lower end of the moving assembly 5 by expanding the electric push rod 27, thereby changing the welding angle of the welding head assembly 8, and the indirection between the welding head assembly 8 and the rear axle can be changed by expanding the telescopic rod 29;

[0061] During the rotation of the arc-shaped rotating member 28, the engaging groove 33 will be separated from the engaging member 31, and the engaging member 31 will move toward the inside of the moving groove 30 and squeeze the reciprocating spring 32, thereby contracting it. After the arc-shaped rotating member 28 completes the rotation, the welding head assembly 8 can be controlled to weld at different positions, and the engagement of the engaging member 31 with the engaging groove 33 can ensure the vertical working stability of the welding head assembly 8, thereby ensuring the convenience and stability of welding of the welding device and increasing the overall practicality.

[0062] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0063] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding device for producing a rear axle of an electric tricycle, comprising a fixed base (1) and a support frame (3) fixedly mounted on the upper end of the fixed base (1); Features: A support rod (4) is fixedly mounted on the upper end of the support frame (3), and a moving assembly (5) is slidably mounted on the outer side of the support rod (4), and a driving device (6) is fixedly mounted on one end of the support rod (4), an adjustment structure (7) is arranged at the lower end of the moving assembly (5), and a welding head assembly (8) is arranged at the lower end of the adjustment structure (7); The upper end of the fixed base (1) is provided with a slide groove (2), and a sliding block (17) is slidably installed inside the slide groove (2), and a support plate (9) is fixedly installed on the upper end of the sliding block (17), and a fixed bracket (12) is fixedly installed on the upper end of the support plate (9); A driving motor (10) is fixedly mounted on the outer side of the fixed base (1), and an output shaft (11) is fixedly mounted on the output end of the driving motor (10), and the output shaft (11) is rotationally connected to the fixed base (1), the output shaft (11) is located inside the slide groove (2), and the output shaft (11) is threadedly connected to the sliding block (17).

2. The welding device for producing rear axles of electric tricycles according to claim 1, characterized in that: A driving motor (13) is fixedly mounted on the lower end of the supporting plate (9), and a rotating shaft (14) is fixedly mounted on the output end of the driving motor (13), and the rotating shaft (14) is rotatably connected to the lower end of the supporting plate (9).

3. The welding device for producing rear axles of electric tricycles according to claim 1, characterized in that: A lifting rod (15) is slidably mounted inside the support plate (9), and a lifting arc plate (16) is fixedly mounted on the upper end of the lifting rod (15), and the lifting arc plate (16) and the upper end of the fixed bracket (12) are both arc-shaped structures when viewed from the side.

4. The welding device for producing rear axles of electric tricycles according to claim 3, characterized in that: The internal thread of the lifting rod (15) is installed with a threaded rod (18), and a bevel gear set (19) is arranged at the lower end of the threaded rod (18) and the outer side of the rotating shaft (14), and the lifting rod (15), the threaded rod (18) and the bevel gear set (19) are arranged in two groups symmetrically about the vertical center axis of the support plate (9), and the threaded rod (18) is rotatably connected to the support plate (9).

5. The welding device for producing rear axles of electric tricycles according to claim 1, characterized in that: A moving member (20) is slidably mounted inside the support plate (9), and a mounting shaft (21) is rotatably mounted inside the upper end of the moving member (20), and a clamping member (22) is threadedly mounted on the upper end of the mounting shaft (21), and the clamping member (22) is slidably connected to the support plate (9).

6. The welding device for producing rear axles of electric tricycles according to claim 5, characterized in that: A pinion gear (24) is fixedly mounted on the outer side of the mounting shaft (21), a fixed rack gear (23) is fixedly mounted on the inner side of the support plate (9), and the fixed rack gear (23) is meshingly connected with the pinion gear (24).

7. The welding device for producing rear axles of electric tricycles according to claim 6, characterized in that: A driving screw rod (25) is rotatably mounted on the lower end of the support plate (9), and the driving screw rod (25) is threadedly connected to the moving member (20), and the driving screw rod (25) and the clamping member (22) are arranged correspondingly, and a bevel gear set (26) is arranged on the outer side of the driving screw rod (25) and the rotating shaft (14).

8. The welding device for producing rear axles of electric tricycles according to claim 1, characterized in that: The adjustment structure (7) is provided with an electric push rod (27), an arc-shaped rotating member (28) and a telescopic rod (29); the arc-shaped rotating member (28) is rotatably mounted on the lower end of the moving assembly (5); the telescopic rod (29) is fixedly mounted on the lower end of the arc-shaped rotating member (28); and the telescopic rod (29) is fixedly connected to the upper end of the welding head assembly (8).

9. The welding device for producing rear axles of electric tricycles according to claim 8, characterized in that: An electric push rod (27) is rotatably mounted on the outer sides of the moving assembly (5) and the arc-shaped rotating member (28), and the upper end of the arc-shaped rotating member (28) is an arc-shaped structure when viewed from the front, and the upper end surface of the arc-shaped rotating member (28) is tightly fitted with the lower end surface of the moving assembly (5).

10. The welding device for producing rear axles of electric tricycles according to claim 9, characterized in that: A moving groove (30) is provided at the lower end of the moving component (5), and a clamping member (31) is slidably installed inside the moving groove (30), and a reciprocating spring (32) is fixedly installed at one end of the clamping member (31) close to the moving groove (30), and a clamping groove (33) is provided at one end of the arc-shaped rotating member (28) close to the moving component (5), and one end of the clamping member (31) close to the clamping groove (33) is located inside the clamping groove (33).

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