Pipe end forming mechanism for hollow pedal arm

Abstract

The utility model discloses a pipe end forming mechanism for a hollow pedal arm, which comprises two processing table boards for placing a pedal arm steel plate and two pressing mechanisms, and is characterized in that positioning plates are symmetrically arranged on one processing table board in a sliding manner; a plurality of telescopic limiting rods used for limiting a bottom pedal arm steel plate are arranged on the opposite sides of the two positioning plates, sliding grooves are formed in the positions, located at the bottoms of the positioning plates, of the machining table top, and adjusting mechanisms used for enabling the two positioning plates to move in the same direction or away from each other at the same time are arranged in the sliding grooves. After an operator aligns two pedal arm steel plates, the two pedal arm steel plates are arranged on the machining table and located between the two positioning plates, the positioning plates are controlled by the adjusting mechanism to move to enable the limiting rods to abut against the pedal arm steel plates below, so that pedal arms are kept stable, then the pedal arms are pressed downwards through the pressing mechanism, and finally welding is completed through a robot. The stability of welding quality is guaranteed, the welding effect is improved, the limiting rods can be adjusted in a telescopic mode, and therefore the device can adapt to pedal arm steel plates of different shapes.

Description

Technical Field

[0001] The utility model relates to the technical field of pedal processing devices, in particular to a tube end forming mechanism for a hollow pedal arm. Background Art

[0002] The brake pedal arm assembly is used in the brake pedal assembly. When braking, the pedal arm needs to be operated to achieve vehicle braking. The pedal arm is generally made of two steel plates stamped and then welded into a hollow pedal, or a piece of steel plate stamped and then welded at the seam to make a hollow pedal arm.

[0003] When welding two steel plates, the operator usually aligns the two steel plates and places them in a fixture. The fixture presses the two steel plates tightly before robot welding. However, when the two steel plates are placed on the tooling, the two steel plates are not limited, which may cause the steel plates to be placed crookedly. After the fixture presses down the two steel plates, the position of the steel plates may also be tilted, thus affecting the welding effect. Utility Model Content

[0004] The purpose of the utility model is to provide a tube end forming mechanism for a hollow pedal arm to solve the above technical problems.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a tube end forming mechanism for a hollow pedal arm, comprising two processing tables for placing pedal arm steel plates and two clamping mechanisms, one of the processing tables being provided with positioning plates for symmetrical sliding movement, and the two positioning plates being provided on opposite sides with a plurality of retractable limiting rods for limiting the bottom pedal arm steel plates, a slide groove being provided on the processing table at the bottom of the positioning plate, and an adjustment mechanism being provided in the slide groove for simultaneously moving the two positioning plates toward or away from each other.

[0006] Preferably, the adjustment mechanism includes a slider, a bidirectional screw and a knob. The slider is slidably arranged in the slide groove and is fixedly connected to the bottom of the two positioning plates respectively. The bidirectional screw is rotatably arranged in the slide groove and one end passes through the side wall of the processing table. The slider is provided with a threaded hole for the bidirectional screw to pass through and is threadedly connected to the bidirectional screw. The end of the bidirectional screw located outside the processing table is fixedly connected to the knob.

[0007] Preferably, the threads of the bidirectional screw with different rotation directions are symmetrically arranged and are respectively threadedly connected to the threaded holes of the two sliders.

[0008] Preferably, the processing table is provided with a limiting ring groove on the circumference of the bidirectional screw, a limiting ring is rotatably provided in the limiting ring groove, the limiting ring is fixedly sleeved on the bidirectional screw, a clamping block groove is provided on the inner wall of the limiting ring groove, a clamping block spring is fixedly provided in the clamping block groove, the clamping block spring is fixedly connected to the clamping block, a clamping groove for the clamping block to be clamped into is provided on the side wall of the limiting ring, and multiple clamping grooves are evenly provided along the outer wall of the limiting ring, and the end of the clamping block located outside the clamping block groove is an arc surface and fits in the clamping groove.

[0009] Preferably, a mounting block groove is provided on one side opposite to the two processing tables, a mounting block is slidably provided in the mounting block groove, the limit rod is detachably connected to the mounting block, the side of the mounting block located in the mounting block groove is an inclined surface, a through groove is provided through the inner wall of the mounting block groove, a fixing seat is fixed on the processing table on the through groove, a control column groove connected to the through groove is provided at the bottom of the fixing seat, and a control mechanism that can be raised and lowered and acts on the inclined surface of the mounting block is provided in the control column groove.

[0010] Preferably, the control mechanism includes a control column, a screw rod and an adjusting button, the control column is slidably arranged in the control column groove and acts on the inclined surface of the mounting block, a threaded groove is provided at one end of the control column located in the control column groove, the screw rod is threadedly connected to the threaded groove, a rotating groove is provided through the bottom of the control column groove, the rotating groove is rotatably connected to the screw rod, the end of the screw rod located outside the rotating groove is fixedly connected to the adjusting button, a positioning ring groove is provided on the inner wall ring of the rotating groove, a positioning ring is rotatably provided in the positioning ring groove, and the positioning ring is fixedly sleeved on the screw rod.

[0011] Preferably, ear plates are symmetrically fixed on the bottom of the control column, and one end of the two ear plates close to the mounting block is rotatably connected to a guide roller, and the guide roller fits the inclined surface of the mounting block.

[0012] Preferably, the inner wall of the mounting block groove is symmetrically provided with a return groove, the inner wall of the return groove close to the limiting rod is fixed with a return spring, the return spring is fixedly connected to a return block, and the return block is slidably arranged in the return groove and fixedly connected to the side wall of the mounting block.

[0013] Preferably, the mounting block is provided with a mounting groove, a thread is provided in the mounting groove and is threadedly connected to the limiting rod, a tightening groove is fixedly provided at the bottom of the mounting groove, a tightening spring is fixed in the tightening groove, the tightening spring is fixedly connected to a tightening block, and the tightening block is slidably connected to the inner wall of the tightening groove.

[0014] Preferably, stabilizing grooves are symmetrically provided on the processing table on both sides of the slide groove, a stabilizing rod is fixedly provided in the stabilizing groove, a stabilizing block is slidably provided in the stabilizing groove and is fixedly connected to the bottom of the two positioning plates respectively, and a through hole is provided on the stabilizing block for the stabilizing rod to pass through and is slidably connected to the stabilizing rod.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] By setting the positioning plate, the limiting rod, the sliding groove, the bidirectional screw, the slider, the threaded hole and the knob, the limiting rod limits the pedal arm steel plate by turning the knob, thereby improving the stability of the welding quality and improving the welding effect;

[0017] By setting the limiting ring, the slot, the block, the block slot and the block spring, the bidirectional screw can be rotated and positioned at any time during the rotation process, thereby preventing the bidirectional screw from being rotated by external force and causing the positioning plate to move.

[0018] By setting the limit rod, the mounting block, the control mechanism, the return groove, the return spring and the return block, the position of the limit rod can be easily adjusted by turning the adjustment knob, so as to facilitate the limiting of pedal arms of different shapes and improve the applicability of the mechanism;

[0019] By arranging the mounting groove, the pressing groove, the pressing block and the pressing spring, a worn limit rod can be easily replaced and the stability of the installation of the limit rod can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 Schematic diagram of the appearance of this embodiment;

[0022] Figure 2 This is an enlarged view of point A in this embodiment;

[0023] Figure 3 This is a cross-sectional view of the limiting rod as viewed from above in this embodiment;

[0024] Figure 4 It is an enlargement of point B in this embodiment;

[0025] Figure 5 This is a cross-sectional view of the bidirectional screw rod as viewed from above in this embodiment;

[0026] Figure 6 This is an enlarged view of position C in this embodiment;

[0027] Figure 7 This is a side sectional view of the fixing seat of this embodiment;

[0028] Figure 8 This is a schematic diagram of the appearance of the control column and guide roller in this embodiment.

[0029] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0030] 1. Processing table; 2. Clamping mechanism; 3. Positioning plate; 4. Limit rod; 5. Mounting block; 6. Slide groove; 7. Bidirectional screw; 8. Slider; 9. Threaded hole; 10. Knob; 11. Limiting ring; 12. Stabilizing groove; 13. Stabilizing block; 14. Stabilizing rod; 15. Through hole; 16. Mounting groove; 17. Clamping groove; 18. Clamping spring; 19. Clamping block; 20. Mounting block groove; 21. Return groove; 22. Return block; 23. Return spring; 24. Through groove; 25. Fixed seat; 26. Control column groove; 27. Control column; 28. Threaded groove; 29. ​​Screw rod; 30. Rotating groove; 31. Adjusting button; 32. Positioning ring groove; 33. Positioning ring; 34. Ear plate; 35. Guide roller; 36. Limiting ring groove; 37. Clamping groove; 38. Clamping block; 39. Clamping block groove; 40. Clamping block spring. DETAILED DESCRIPTION

[0031] The following will be combined with the accompanying 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0032] See also Figure 1-8 The utility model provides a technical solution: a tube end forming mechanism for a hollow pedal arm, comprising two processing tables 1 for placing pedal arm steel plates and two pressing mechanisms 2, a positioning plate 3 is symmetrically slidably provided on one processing table 1, a plurality of retractable limiting rods 4 for limiting the bottom pedal arm steel plate are provided on opposite sides of the two positioning plates 3, a slide groove 6 is provided on the processing table 1 at the bottom of the positioning plate 3, and an adjustment mechanism is provided in the slide groove 6 for making the two positioning plates 3 move toward or away from each other at the same time.

[0033] Specifically, the adjustment mechanism includes a slider 8, a bidirectional screw 7 and a knob 10. The slider 8 is slidably arranged in the slide groove 6 and is fixedly connected to the bottom of the two positioning plates 3 respectively. The bidirectional screw 7 is rotatably arranged in the slide groove 6 and one end passes through the side wall of the processing table 1. The slider 8 is provided with a threaded hole 9 for the bidirectional screw 7 to pass through and is threadedly connected to the bidirectional screw 7. The end of the bidirectional screw 7 located outside the processing table 1 is fixedly connected to the knob 10. Turning the knob 10 drives the bidirectional screw 7 to rotate. The threaded connection between the bidirectional screw 7 and the threaded hole 9 of the slider 8 makes the two sliders 8 slide in the slide groove 6. The slider 8 then drives the positioning plate 3 to slide, so that the two positioning plates 3 move toward each other, driving the limit rod 4 to limit the pedal arm steel plate.

[0034] Specifically, the threads of the bidirectional screw 7 with different rotation directions are symmetrically arranged and are respectively threadedly connected to the threaded holes 9 of the two sliders 8, so that the two sliders 8 can move in both directions or move away from each other at the same time under the rotation of the bidirectional screw 7, thereby realizing the limiting and loosening of the pedal arm steel plate by the limit rod 4.

[0035] Specifically, the processing table 1 is provided with a limiting ring groove 36 on the side of the bidirectional screw 7, and a limiting ring 11 is rotatably provided in the limiting ring groove 36. The limiting ring 11 is fixedly sleeved on the bidirectional screw 7. The limiting ring 11 and the limiting ring groove 36 prevent the bidirectional screw 7 from axial movement, thereby improving the stability of the bidirectional screw 7. A clamping block groove 39 is provided on the inner wall of the limiting ring groove 36, and a clamping block spring 40 is fixedly provided in the clamping block groove 39. The clamping block spring 40 is fixedly connected to the clamping block 38. A clamping groove 37 for the clamping block 38 to be clamped is provided on the side wall of the limiting ring 11, and a plurality of clamping grooves are evenly provided along the outer wall of the limiting ring 11. The end of the clamping block 38 outside the clamping block groove 39 is an arc surface and fits in the clamping groove 37. The limit of the block 38 is used to limit the rotation of the bidirectional screw 7, thereby improving the stability of the bidirectional screw 7. The bidirectional screw 7 is turned with force, and the arc surface of the block 38 is subjected to force to compress the block spring 40 so that the block 38 slides into the block groove 39 until the block 38 is opposite to the next slot 37. At this time, the block 38 is opposite to the slot 37, and under the elastic action of the block spring 40, the block 38 is clamped into the slot 37 to limit the bidirectional screw 7, so that the bidirectional screw 7 can be rotated and can be positioned at any time during the rotation process, thereby preventing the bidirectional screw 7 from being rotated by external force and causing the positioning plate 3 to move.

[0036] Specifically, a mounting block groove 20 is provided on one side opposite to the other of the two processing tables 1, and a mounting block 5 is slidably provided in the mounting block groove 20. The limit rod 4 is detachably connected to the mounting block 5, and the limit rod 4 can be replaced. The side of the mounting block 5 located in the mounting block groove 20 is an inclined surface, and a through groove 24 is provided through the inner wall of the mounting block groove 20. A fixing seat 25 is fixed on the through groove 24 on the processing table 1, and a control column groove 26 connected to the through groove 24 is provided at the bottom of the fixing seat 25. A control mechanism that acts on the inclined surface of the mounting block 5 can be raised and lowered in the control column groove 26. Through the action of the control mechanism and the inclined surface of the mounting block 5, the mounting block 5 slides in the mounting block groove 20 to adjust the telescopic length of the limit rod 4.

[0037] Specifically, the control mechanism includes a control column 27, a screw rod 29 and an adjusting button 31. The control column 27 is slidably arranged in the control column groove 26 and acts on the inclined surface of the mounting block 5. The end of the control column 27 located in the control column groove 26 is provided with a threaded groove 28. The screw rod 29 is threadedly connected to the threaded groove 28. A rotation groove 30 is provided through the bottom of the control column groove 26. The rotation groove 30 is rotatably connected to the screw rod 29. The end of the screw rod 29 located outside the rotation groove 30 is fixedly connected to the adjusting button 31. Turning the adjusting button 31 causes the screw rod 29 to rotate. The movable screw 29 rotates, and through the threaded connection between the screw 29 and the threaded groove 28, the control column 27 moves in the control column groove 26 under the rotation of the screw 29, thereby exerting force on the inclined surface of the mounting block 5. A positioning ring groove 32 is provided on the inner wall ring of the rotating groove 30, and a positioning ring 33 is provided for rotation in the positioning ring groove 32. The positioning ring 33 is fixedly sleeved on the screw 29. The positioning of the positioning ring 33 and the positioning ring groove 32 prevents the screw 29 from axial movement and affects the control of the lifting and lowering of the control column 27.

[0038] Specifically, ear plates 34 are symmetrically fixed at the bottom of the control column 27. The two ear plates 34 are rotatably connected to one end of the mounting block 5. The guide rollers 35 fit the inclined surface of the mounting block 5. When the control column 27 moves downward, the guide rollers 35 are driven downward. The guide rollers 35 resist the inclined surface of the mounting block 5 and apply force to the inclined surface of the mounting block 5. The guide rollers 35 are rollingly connected to the inclined surface of the mounting block 5, which can reduce the friction loss of the structure and improve the service life of the structure.

[0039] Specifically, return grooves 21 are symmetrically provided on the inner wall of the mounting block groove 20, and a return spring 23 is fixedly provided on the inner wall of the return groove 21 near the limit rod 4. The return spring 23 is fixedly connected to the return block 22. The return block 22 is slidably arranged in the return groove 21 and is fixedly connected to the side wall of the mounting block 5. The mounting block 5 is moved out of the mounting block groove 20 by the action of the guide roller 35 of the control column. The mounting block 5 drives the return block 22 to move and compresses the return spring 23. When the guide roller 35 moves upward to reduce the effect on the inclined surface of the mounting block 5, under the elastic force of the return spring 23, the mounting block 5 moves to the bottom of the mounting block groove 20 and maintains the state in which the inclined surface of the mounting block 5 is against the guide roller 35, thereby completing the adjustment of the position of the positioning rod 4.

[0040] Specifically, the mounting block 5 is provided with a mounting groove 16, which is provided with a thread and is threadedly connected to the limit rod 4, so as to facilitate the disassembly and assembly of the limit rod 4 and the mounting block 5, and to replace the limit rod 4 respectively. A tightening groove 17 is fixedly provided at the bottom of the mounting groove 16, and a tightening spring 18 is fixed in the tightening groove 17. The tightening spring 18 is fixedly connected with a tightening block 19, and the tightening block 19 is slidably connected to the inner wall of the tightening groove 17. When installing the limit rod 4, the limit rod 4 is screwed into the mounting groove 16. After the tightening block 19 is subjected to the force of the limit rod 4, the tightening block 19 compresses the tightening spring 18 until the limit rod 4 is against the bottom of the mounting groove 16, and the installation of the limit rod 4 is completed. Under the elastic force of the tightening spring 18, the tightening block 19 exerts force on the limit rod 5, further improving the stability of the installation of the limit rod 4.

[0041] Specifically, stabilizing grooves 12 are symmetrically provided on both sides of the slide groove 6 on the processing table 1, and a stabilizing rod 14 is fixedly provided in the stabilizing groove 12. Stabilizing blocks 13 are slidably provided in the stabilizing groove 12 and are respectively fixedly connected to the bottom of the two positioning plates 3. A through hole 15 is provided on the stabilizing block 13 for the stabilizing rod 14 to pass through and is slidably connected to the stabilizing rod 14. The stability of the movement of the two positioning plates 3 is further improved by limiting the stabilizing rod 14 and the stabilizing block 13.

[0042] A specific application example of this embodiment is:

[0043] When the device is in use, the two pedal arm steel plates to be welded are assembled and placed on the processing table 1 between the two positioning plates 3. The raised front ends of the two pedal arm steel plates are located on the other processing table 1. The knob 10 is turned to drive the bidirectional screw 7 to rotate. The two sliders 8 slide in the slide groove 6 through the threaded connection between the bidirectional screw 7 and the threaded hole 9 of the slider 8. The slider 8 then drives the positioning plate 3 to slide, so that the two positioning plates 3 move toward each other and drive the limit rod 4 to limit the side wall of the lower pedal arm steel plate. Then, the upper and lower pedal arm steel plates are pressed together by the clamping mechanism. Finally, welding is performed by a robot (this is the existing technology). The positions of different limit rods 4 can also be adjusted. The adjusting knob 31 is turned to drive the screw rod 29 to rotate. Through the threaded connection between the screw rod 29 and the threaded groove 28, the control column 27 moves in the control column groove 26 under the rotation of the screw rod 29. When the control column 27 moves downward, it drives the guide roller 35 to move downward. The guide roller 35 is against the inclined surface of the mounting block 5 and exerts force on the inclined surface of the mounting block 5. The block 5 is moved out of the mounting block groove 20 by the action of the guide roller 35 of the control column. The mounting block 5 drives the return block 22 to move and compresses the return spring 23, thereby completing the extension of the limit rod 4. The adjusting knob 31 is rotated in the opposite direction, so that the control column 27 moves up and drives the guide roller 35 to move up. The upward movement of the guide roller 35 reduces the effect on the inclined surface of the mounting block 5. Under the elastic force of the return spring 23, the mounting block 5 moves to the bottom of the mounting block groove 20 and keeps the inclined surface of the mounting block 5 against the guide roller 35, thereby completing the positioning. The retraction of rod 4 can be applied to the positioning of pedal arm steel plates of different shapes. When the positioning rod 4 is damaged, the positioning rod 4 can be unscrewed for replacement. During installation, the limit rod 4 is screwed into the installation groove 16. After the tightening block 19 is subjected to the force of the limit rod 4, the tightening block 19 compresses the tightening spring 18 until the limit rod 4 is abutted against the bottom of the installation groove 16. The installation of the limit rod 4 is completed. Under the elastic force of the tightening spring 18, the tightening block 19 applies force to the limit rod 5, further improving the stability of the installation of the limit rod 4.

[0044] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends", etc., indicating orientations or positional relationships, are orientations or positional relationships based on the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0045] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0046] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hollow pedal arm tube end forming mechanism, comprising two processing tables (1) for placing pedal arm steel plates and two pressing mechanisms (2), characterized in that: A positioning plate (3) is symmetrically slidably provided on one of the processing tables (1), and a plurality of limit rods (4) with adjustable lengths for limiting the bottom pedal arm steel plates are provided on opposite sides of the two positioning plates (3). A sliding groove (6) is provided at the bottom of the positioning plate (3) on the processing table (1), and an adjustment mechanism is provided in the sliding groove (6) for simultaneously moving the two positioning plates (3) toward or away from each other.

2. The tube end forming mechanism for a hollow pedal arm according to claim 1, characterized in that: The adjustment mechanism includes a slider (8), a bidirectional screw (7) and a knob (10), wherein the slider (8) is slidably arranged in the slide groove (6) and is fixedly connected to the bottom of the two positioning plates (3) respectively, and the bidirectional screw (7) is rotatably arranged in the slide groove (6) and one end thereof passes through the side wall of the processing table (1), and the slider (8) is provided with a threaded hole (9) for the bidirectional screw (7) to pass through and is threadedly connected to the bidirectional screw (7), and one end of the bidirectional screw (7) located outside the processing table (1) is fixedly connected to the knob (10).

3. The tube end forming mechanism for a hollow pedal arm according to claim 2, characterized in that: The threads of the bidirectional screw (7) with different rotation directions are symmetrically arranged and are respectively threadedly connected to the threaded holes (9) of the two sliders (8).

4. The tube end forming mechanism for a hollow pedal arm according to claim 2, characterized in that: The processing table (1) is provided with a limiting ring groove (36) on the circumferential side of the bidirectional screw (7), a limiting ring (11) is rotatably provided in the limiting ring groove (36), the limiting ring (11) is fixedly sleeved on the bidirectional screw (7), a clamping block groove (39) is provided on the inner wall of the limiting ring groove (36), a clamping block spring (40) is fixedly provided in the clamping block groove (39), the clamping block spring (40) is fixedly connected with a clamping block (38), a clamping groove (37) for the clamping block (38) to be clamped is provided on the side wall of the limiting ring (11), and a plurality of clamping grooves are evenly provided along the outer wall of the limiting ring (11), and one end of the clamping block (38) located outside the clamping block groove (39) is an arc surface and fits in the clamping groove (37).

5. The tube end forming mechanism for a hollow pedal arm according to claim 1, characterized in that: A mounting block groove (20) is provided on one side opposite to the two processing tables (1), a mounting block (5) is slidably provided in the mounting block groove (20), the limiting rod (4) is detachably connected to the mounting block (5), the side of the mounting block (5) located in the mounting block groove (20) is an inclined surface, a through groove (24) is provided through the inner wall of the mounting block groove (20), a fixing seat (25) is fixed on the processing table (1) and located on the through groove (24), a control column groove (26) is provided at the bottom of the fixing seat (25) and is communicated with the through groove (24), and a control mechanism that can be raised and lowered and acts on the inclined surface of the mounting block (5) is provided in the control column groove (26).

6. The tube end forming mechanism for a hollow pedal arm according to claim 5, characterized in that: The control mechanism comprises a control column (27), a screw rod (29) and an adjusting button (31), wherein the control column (27) is slidably arranged in the control column groove (26) and acts on the inclined surface of the mounting block (5), and a threaded groove (28) is provided at one end of the control column (27) located in the control column groove (26), and the screw rod (29) is threadedly connected in the threaded groove (28), and a rotation groove (30) is provided through the bottom of the control column groove (26), and the rotation groove (30) is rotationally connected to the screw rod (29), and one end of the screw rod (29) located outside the rotation groove (30) is fixedly connected to the adjusting button (31), and a positioning ring groove (32) is provided on the inner wall ring of the rotation groove (30), and a positioning ring (33) is rotatably provided in the positioning ring groove (32), and the positioning ring (33) is fixedly sleeved on the screw rod (29).

7. The tube end forming mechanism for a hollow pedal arm according to claim 6, characterized in that: The bottom of the control column (27) is symmetrically fixed with ear plates (34), and one end of the two ear plates (34) close to the mounting block (5) is rotatably connected to a guide roller (35), and the guide roller (35) is in contact with the inclined surface of the mounting block (5).

8. The tube end forming mechanism for a hollow pedal arm according to claim 5, characterized in that: The inner wall of the mounting block groove (20) is symmetrically provided with a return groove (21), and the inner wall of the return groove (21) close to the limiting rod (4) is fixedly provided with a return spring (23), and the return spring (23) is fixedly connected to the return block (22), and the return block (22) is slidably arranged in the return groove (21) and fixedly connected to the side wall of the mounting block (5).

9. The tube end forming mechanism for a hollow pedal arm according to claim 5, characterized in that: The mounting block (5) is provided with a mounting groove (16), a thread is provided in the mounting groove (16) and is threadedly connected to the limiting rod (4), a tightening groove (17) is fixedly provided at the bottom of the mounting groove (16), a tightening spring (18) is fixed in the tightening groove (17), the tightening spring (18) is fixedly connected to a tightening block (19), and the tightening block (19) is slidably connected to the inner wall of the tightening groove (17).

10. The tube end forming mechanism for a hollow pedal arm according to claim 1, characterized in that: The processing table (1) is provided with symmetrical stabilizing grooves (12) on both sides of the slide groove (6), a stabilizing rod (14) is fixedly provided in the stabilizing groove (12), a stabilizing block (13) is slidably provided in the stabilizing groove (12) and is fixedly connected to the bottom of the two positioning plates (3), and a through hole (15) is provided on the stabilizing block (13) for the stabilizing rod (14) to pass through and is slidably connected to the stabilizing rod (14).

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