Brake handle assembly jig

Abstract

The present invention discloses a brake handle assembly jig, comprising a base, a main handlebar positioning block fixed on the base for fixing and positioning the middle part of the handlebar, an auxiliary handlebar positioning block installed on the base and capable of moving up and down in a vertical direction, a brake handle support block installed on the auxiliary handlebar positioning block, and an auxiliary positioning height adjustment mechanism and a brake handle height adjustment mechanism for adjusting the height of the auxiliary handlebar positioning block and the brake handle support block. The two auxiliary handlebar positioning blocks are respectively located on both sides of the main handlebar positioning block along the extension direction of the handlebar, and the handlebar parts at both ends of the handlebar for installing the brake handles can be respectively positioned on the auxiliary handlebar positioning blocks, and the two brake handle support blocks are arranged one by one opposite to the two auxiliary handlebar positioning blocks. The two brake handles installed on the handlebar parts of the handlebar can be supported on the surface of the brake handle support block. The present invention can realize the precise installation of handlebar brakes of various models of bicycles, and the assembly efficiency of the brake and the handlebar is high.

Description

Technical Field

[0001] The invention relates to a bicycle assembly jig, in particular to a brake handle assembly jig. Background Art

[0002] At present, when assembling the brake handle of a bicycle with the bicycle crossbar, the worker directly puts the brake handle on the handle parts at both ends of the bicycle crossbar, and then preliminarily fastens the brake handle to the handle parts at both ends of the bicycle crossbar with screws, and then slides and rotates the brake handle left and right to make its position at both ends of the bicycle crossbar basically symmetrical, and make the angle between the brake handle and the horizontal plane on the bicycle crossbar basically at an angle that is convenient for gripping. At present, the assembly position and inclination angle of the bicycle brake handle and the crossbar all rely on visual adjustment by workers, which often leads to inconsistent installation position and inclination angle of the brake handle. In addition, due to assembly errors, the user's braking operation is easily affected while riding, and the user needs to adjust the brake position and angle again, which affects the user's riding experience. Summary of the Invention

[0003] In order to overcome the above-mentioned defects, the present invention provides a brake handle assembly jig. The bicycle brake handle assembled by the brake handle assembly jig is accurately positioned, easy to use, and provides a better riding experience.

[0004] The two brake handle support blocks are respectively installed on the base and can move up and down in the vertical direction, and the two brake handle support blocks are respectively located on both sides of the cross handle main positioning block along the extension direction of the cross handle. The handle parts at both ends of the cross handle for installing the brake handle can be respectively positioned on the cross handle auxiliary positioning blocks, and the two brake handle support blocks are respectively installed on the base and can move up and down in the vertical direction, and the two brake handle support blocks are arranged one by one opposite to the two cross handle auxiliary positioning blocks. The two brake handles installed on the handle parts of the cross handle can be supported on the surface of the brake handle support block, and the auxiliary positioning height adjustment mechanism and the brake handle height adjustment mechanism can respectively adjust the heights of the two cross handle auxiliary positioning blocks and the brake handle support block.

[0005] As a further improvement of the present invention, a baffle support rod is fixed on the auxiliary positioning block of the horizontal handlebar located on one side of the main positioning block of the horizontal handlebar, and the extension direction of the baffle support rod is the same as the extension direction of the handle at one end of the horizontal handlebar. The baffle support rod is slidably installed with a horizontal handlebar length baffle, and the horizontal handlebar length baffle is stopped on the end surface of the handlebar at one end of the horizontal handlebar. The horizontal handlebar length baffle is also movably threadedly connected to the first adjustment handle, and the stud of the first adjustment handle can be tightened and positioned at any position of the baffle support rod. The baffle support rod is provided with a length dimension scale line, and the horizontal handlebar length baffle can be aligned with the scale on the length dimension scale line.

[0006] As a further improvement of the present invention, a vertical rod positioning block is installed on the horizontal handle main positioning block, which can rotate around the horizontal rotation axis. The vertical rod positioning block is provided with a vertical rod accommodating groove, and the vertical rod fixedly connected to the horizontal handle can be supported in the vertical rod accommodating groove.

[0007] As a further improvement of the present invention, the base is also provided with front and rear adjustment rails and front and rear adjustment sliders. The extension direction of the front and rear adjustment rails is perpendicular to the axial extension direction of the horizontal handle. The front and rear adjustment sliders can be slidably installed on the front and rear adjustment rails. The front and rear adjustment sliders are also provided with a second adjustment handle. The stud of the second adjustment handle can be tightly positioned at any position of the front and rear adjustment rails. The main positioning block of the horizontal handle is installed on the front and rear adjustment sliders.

[0008] As a further improvement of the present invention, the front and rear adjustment sliders are also provided with a handlebar height adjustment slider that can slide in the vertical direction, and the handlebar height adjustment slider is equipped with an eighth adjustment handle. The stud of the eighth adjustment handle can be tightly positioned with any position of the front and rear adjustment sliders, and the handlebar main positioning block is fixedly installed on the handlebar height adjustment slider.

[0009] As a further improvement of the present invention, the horizontal handlebar main positioning block includes a horizontal handlebar fixing plate, a horizontal handlebar middle fixed supporting block and a horizontal handlebar diameter anti-fool mold. The two horizontal handlebar middle fixed supporting blocks are arranged on the horizontal handlebar fixing plate at intervals along the axial extension direction of the horizontal handlebar. An arc-shaped groove-shaped supporting surface is formed on the horizontal handlebar middle fixed supporting block. The middle part of the horizontal handlebar can be supported on the supporting surface of the two horizontal handlebar middle fixed supporting blocks. The horizontal handlebar diameter anti-fool mold can be removably installed on the horizontal handlebar fixing plate. A U-shaped anti-fool groove matching the assembled horizontal handlebar diameter and bending curvature is formed on the horizontal handlebar diameter anti-fool mold. The middle part of the horizontal handlebar supported on the two horizontal handlebar middle fixed supporting blocks can be inserted into the U-shaped anti-fool groove on the horizontal handlebar diameter anti-fool mold.

[0010] As a further improvement of the present invention, the base is also provided with left and right adjustment rails and left and right adjustment sliders. The extension direction of the left and right adjustment rails is consistent with the axial extension direction of the horizontal handlebar. The two left and right adjustment rails are respectively located on both sides of the front and rear adjustment rails along the axial extension direction of the horizontal handlebar. The left and right adjustment sliders can be slidably installed on the left and right adjustment rails. A third adjustment handle is also provided on the left and right adjustment sliders. The stud of the third adjustment handle can be tightly positioned with any position of the left and right adjustment rails. The horizontal handle auxiliary positioning block and the brake handle support block are respectively installed on the left and right adjustment sliders.

[0011] As a further improvement of the present invention, an auxiliary positioning horizontal adjustment block and a brake positioning horizontal adjustment block are also provided, and the auxiliary positioning horizontal adjustment block and the brake positioning horizontal adjustment block can be slidably installed on the left and right adjustment sliders respectively, and the auxiliary positioning horizontal adjustment block and the brake positioning horizontal adjustment block can slide along the sliding direction of the front and rear adjustment sliders and the left and right adjustment sliders respectively, and the auxiliary positioning horizontal adjustment block and the brake positioning horizontal adjustment block are also provided with positioning screws, and the positioning screws can fix the auxiliary positioning horizontal adjustment block and the brake positioning horizontal adjustment block to the left and right adjustment sliders at any position, and the auxiliary positioning height adjustment mechanism includes a first vertical fixing seat, a first vertical sliding rod and a fourth adjustment handle, the first vertical fixing seat is installed on the auxiliary positioning horizontal adjustment block, the first vertical sliding rod can be slid in the vertical direction and inserted into the first vertical fixing seat, and the fourth The adjusting handle is movably threadedly connected to the first vertical fixing seat, and the end of the stud of the fourth adjusting handle can be tightly against the surface of the first vertical sliding rod so that it is locked and positioned with the first vertical fixing seat at any height position. The brake handle height adjustment mechanism includes a second vertical fixing seat, a second vertical sliding rod and a fifth adjusting handle, the second vertical fixing seat is installed on the brake positioning horizontal adjustment block, the second vertical sliding rod can be slidably inserted in the second vertical fixing seat in the vertical direction, the fifth adjusting handle is movably threadedly connected to the second vertical fixing seat, and the end of the stud of the fifth adjusting handle can be tightly against the surface of the second vertical sliding rod so that it is locked and positioned with the second vertical fixing seat at any height position, the horizontal handle auxiliary positioning block and the brake handle support block are respectively fixedly installed on the upper ends of the first vertical sliding rod and the second vertical sliding rod, and the brake handle support block is provided with a brake supporting groove for supporting and positioning the brake handle.

[0012] As a further improvement of the present invention, the auxiliary positioning horizontal adjustment block and the brake positioning horizontal adjustment block are respectively provided with a first angle adjustment sleeve and a second angle adjustment sleeve, and the first vertical fixing seat and the second vertical fixing seat are respectively rotatable around the vertical axis and inserted into the first angle adjustment sleeve and the second angle adjustment sleeve, and the first angle adjustment sleeve and the second angle adjustment sleeve are respectively movably threaded with a sixth adjustment handle and a seventh adjustment handle, and the stud ends of the sixth adjustment handle and the seventh adjustment handle can be tightly pressed against the circumferential outer surfaces of the first vertical fixing seat and the second vertical fixing seat, so that the first vertical fixing seat and the second vertical fixing seat are respectively locked with the first angle adjustment sleeve and the second angle adjustment sleeve at any angle position.

[0013] As a further improvement of the present invention, a front and rear position scale and a left and right position scale are fixed on the base, and the front and rear adjustment sliders and the left and right adjustment sliders can respectively face the scales on the front and rear position scale and the left and right position scale. The horizontal handle height adjustment slider, the first vertical sliding rod and the second vertical sliding rod are also respectively provided with height position scales, and the upper end surfaces of the front and rear adjustment sliders, the first vertical fixing seat and the second vertical fixing seat can respectively face the scales on the height position scale.

[0014] The beneficial effects of the present invention are as follows: the present invention supports and positions the middle part of the handlebar of a bicycle through a main handlebar positioning block that can be adjusted in front and back and in height, and can adapt to the handlebar positioning and assembly of brake handles with various curvatures and bending angles. Auxiliary handlebar positioning blocks and brake handle support blocks that can be adjusted left and right, in height and in circumferential directions are provided on both sides of the main handlebar positioning block, which are respectively used to support and position the handle parts at both ends of the bicycle handlebar and the brake handle installed on the handle parts of the handlebar. When assembling the brake handle, the position and inclination of the brake handle can be adjusted according to different models of bicycles by adjusting the handlebar. After adjustment, the brake handle can ensure accurate installation position and installation angle during assembly, and effectively improves the assembly efficiency of the brake and handlebar. The present invention also prevents the specifications of the handlebar from matching by providing a handlebar length baffle and a handlebar diameter anti-mismatch mold, so as to prevent the assembly specifications and models of the bicycle handlebar and the brake handle from matching. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The figure is a front view of the handlebar and brake handle assembly of a bicycle;

[0016] Figure 2 The main view of the structural principle of the present invention;

[0017] Figure 3 It is a right view of the structural principle of the present invention;

[0018] Figure 4 It is a top view of the structural principle of the present invention;

[0019] Figure 5 This is a front view of the brake handle support block structure principle of the present invention;

[0020] Figure 6 A top view of the brake handle support block structure principle of the present invention;

[0021] Figure 7 This is a front view of the structure principle of the auxiliary positioning block of the horizontal handle of the present invention;

[0022] Figure 8 This is a top view of the structure principle of the handlebar auxiliary positioning block of the present invention;

[0023] Figure 9 This is a front view of the baffle support rod and the handlebar length baffle of the present invention;

[0024] Figure 10 This is a schematic diagram of the structural principle of the handlebar height adjustment slider, the first vertical sliding rod, and the second vertical sliding rod of the present invention. DETAILED DESCRIPTION

[0025] Embodiment: A brake handle assembly fixture, comprising a base 1, a horizontal handle main positioning block, a horizontal handle auxiliary positioning block 2, a brake handle support block 3, an auxiliary positioning height adjustment mechanism and a brake handle height adjustment mechanism, wherein the horizontal handle main positioning block can be fixedly positioned on the base 1, the horizontal handle main positioning block can fix and position the middle part of the horizontal handle 28, and two horizontal handle auxiliary positioning blocks 2 can be respectively installed on the base 1 and moved up and down in the vertical direction, and the two horizontal handle auxiliary positioning blocks 2 are respectively located on both sides of the horizontal handle main positioning block along the extension direction of the horizontal handle 28, and the two ends of the horizontal handle 28 are fixedly positioned on the base 1. The handle parts for installing the brake handle 29 can be positioned on the said horizontal handle auxiliary positioning block 2 respectively, and the two brake handle support blocks 3 can be installed on the base 1 so as to move up and down in the vertical direction respectively, and the two brake handle support blocks 3 are arranged one by one opposite to the two horizontal handle auxiliary positioning blocks 2, and the two brake handles 29 installed on the handle parts of the horizontal handle 28 can be supported on the surface of the said brake handle support block 3, and the said auxiliary positioning height adjustment mechanism and the brake handle height adjustment mechanism can respectively adjust the height of the two horizontal handle auxiliary positioning blocks 2 and the brake handle support block 3.

[0026] The brake lever 29 is then positioned on the handlebar 28 so that the user can adjust the height of the handlebar 28 so that the user can move the handlebar 29 to the desired position.

[0027] A baffle support rod 4 is fixedly mounted on the handlebar auxiliary positioning block 2 located on one side of the handlebar main positioning block. The baffle support rod 4 extends in the same direction as the handlebar at one end of the handlebar 28. A handlebar length baffle 30 is slidably mounted on the baffle support rod 4. The handlebar length baffle 30 abuts against the handlebar end surface at one end of the handlebar 28. A first adjustment handle is also movably threadedly connected to the handlebar length baffle 30. The stud of the first adjustment handle can be tightly positioned against the baffle support rod 4 at any position. The baffle support rod 4 is provided with a length dimension scale line 5, and the handlebar length baffle 30 can be aligned with the scale on the length dimension scale line 5. By sliding the handlebar length baffle 30 on the baffle support rod 4, the length of the handlebar 28 is limited and foolproof, preventing the handlebar 28 from being incorrectly specified.

[0028] A vertical rod positioning block 31 is also mounted on the main horizontal handlebar positioning block, rotatable about a horizontal axis. This vertical rod positioning block 31 is provided with a vertical rod receiving slot, within which the vertical rod fixedly connected to the horizontal handlebar 28 is supported. The vertical rod positioning block 31 supports and positions the vertical rod on the bicycle, further ensuring that the brake handle 29 maintains a precise and stable angle relative to the horizontal direction after assembly with the horizontal handlebar 28.

[0029] The base 1 is further provided with a front-to-back adjustment rail 6 and a front-to-back adjustment slider 7. The front-to-back adjustment rail 6 extends perpendicularly to the axial extension direction of the handlebar 28. The front-to-back adjustment slider 7 is slidably mounted on the front-to-back adjustment rail 6. The front-to-back adjustment slider 7 is further provided with a second adjustment handle 8. The stud of the second adjustment handle 8 can be pressed and positioned at any position on the front-to-back adjustment rail 6. The main positioning block of the handlebar is mounted on the front-to-back adjustment slider 7. By moving the front-to-back adjustment slider 7 on the front-to-back adjustment rail 6, the distance between the main positioning block of the handlebar and the auxiliary positioning block 2 of the handlebar is changed in the front-to-back direction, thereby adapting to the curvature of handlebars 28 of different specifications.

[0030] The front-rear adjustment slider 7 is also provided with a handlebar height adjustment slider 9 that can slide in the vertical direction. An eighth adjustment handle 10 is mounted on the handlebar height adjustment slider 9. The stud of the eighth adjustment handle 10 can be pressed and positioned at any position on the front-rear adjustment slider 7. The handlebar main positioning block is fixedly mounted on the handlebar height adjustment slider 9. By adjusting the handlebar height adjustment slider 9 in the height direction, the height of the handlebar main positioning block is changed, thereby adapting to different height curvatures of the middle portion of the handlebar 28.

[0031] The handlebar main positioning block includes a handlebar fixing plate 11, a handlebar intermediate fixing support block 12, and a handlebar diameter anti-scam mold 13. Two handlebar intermediate fixing support blocks 12 are spaced apart on the handlebar fixing plate 11 along the axial extension direction of the handlebar 28. The handlebar intermediate fixing support blocks 12 are formed with arc-shaped groove-shaped supporting surfaces, and the middle portion of the handlebar 28 can be supported on the supporting surfaces of the two handlebar intermediate fixing support blocks 12. The handlebar diameter anti-scam mold 13 is detachably mounted on the handlebar fixing plate 11. The handlebar diameter anti-scam mold 13 is formed with a U-shaped anti-scam groove that matches the diameter and curvature of the assembled handlebar 28. The middle portion of the handlebar 28 supported on the two handlebar intermediate fixing support blocks 12 can be inserted into the U-shaped anti-scam groove of the handlebar diameter anti-scam mold 13. By replacing different handlebar diameter anti-scam molds 13 on the handlebar fixing plate 11, handlebars 28 with different diameters can be accommodated, thereby preventing incorrect assembly of the handlebar 28 diameter.

[0032] The base 1 is further provided with left and right adjustment rails 14 and left and right adjustment sliders 15. The left and right adjustment rails 14 extend in the same direction as the axial extension of the handlebar 28. The two left and right adjustment rails 14 are located on either side of the front and rear adjustment rails 6 along the axial extension of the handlebar 28. The left and right adjustment sliders 15 are slidably mounted on the left and right adjustment rails 14. The left and right adjustment sliders 15 are further provided with a third adjustment handle, the stud of which can be tightened and positioned at any position on the left and right adjustment rails 14. The handlebar auxiliary positioning block 2 and the brake handle support block 3 are respectively mounted on the left and right adjustment sliders 15. By sliding the left and right adjustment sliders 15 in the left and right directions, the positions of the handlebar auxiliary positioning block 2 and the brake handle support block 3 in the longitudinal direction of the handlebar 28 are changed, thereby adapting to the installation position of the brake handle 29 on handlebars 28 of different specifications and enabling the assembly of brake handles 29 on handlebars 28 of different lengths.

[0033] An auxiliary positioning horizontal adjustment block 16 and a brake positioning horizontal adjustment block 17 are also provided. The auxiliary positioning horizontal adjustment block 16 and the brake positioning horizontal adjustment block 17 can be slidably installed on the left and right adjustment sliders 15 respectively. The auxiliary positioning horizontal adjustment block 16 and the brake positioning horizontal adjustment block 17 can slide along the sliding direction of the front and rear adjustment sliders 7 and the left and right adjustment sliders 15 respectively. The auxiliary positioning horizontal adjustment block 16 and the brake positioning horizontal adjustment block 17 are also provided with positioning screws. The positioning screws can fix the auxiliary positioning horizontal adjustment block 16 and the brake positioning horizontal adjustment block 17 to the left and right adjustment sliders 15 at any position. The auxiliary positioning height adjustment mechanism includes a first vertical fixed seat 18, a first vertical sliding rod 19 and a fourth adjustment handle 20. The first vertical fixed seat 18 is installed on the auxiliary positioning horizontal adjustment block 16, the first vertical sliding rod 19 can be slidably inserted in the first vertical fixed seat 18 in the vertical direction, and the fourth adjustment handle 20 is movable The fourth adjusting handle 20 is threadedly connected to the first vertical fixing seat 18, and the stud end of the fourth adjusting handle 20 can be tightly pressed against the surface of the first vertical sliding rod 19 so that it is locked and positioned with the first vertical fixing seat 18 at any height position. The brake handle height adjustment mechanism includes a second vertical fixing seat 21, a second vertical sliding rod 22 and a fifth adjusting handle 23. The second vertical fixing seat 21 is installed on the brake positioning horizontal adjustment block 17, and the second vertical sliding rod 22 can be slidably inserted in the second vertical fixing seat 21 in the vertical direction. The fifth adjusting handle 23 is movably threadedly connected to the second vertical fixing seat 21, and the stud end of the fifth adjusting handle 23 can be tightly pressed against the surface of the second vertical sliding rod 22 so that it is locked and positioned with the second vertical fixing seat 21 at any height position. The horizontal handle auxiliary positioning block 2 and the brake handle support block 3 are respectively fixedly installed on the upper ends of the first vertical sliding rod 19 and the second vertical sliding rod 22. The brake handle support block 3 is provided with a brake supporting groove 27 for supporting and positioning the brake handle 29. The auxiliary positioning horizontal adjustment block 16 and the brake positioning horizontal adjustment block 17 are fine-tuned in the front-back and left-right directions to adapt to the assembly of brake handles 29 of different specifications and models.

[0034] The auxiliary positioning horizontal adjustment block 16 and the brake positioning horizontal adjustment block 17 are also respectively fixed with a first angle adjustment sleeve 24 and a second angle adjustment sleeve 25, and the first vertical fixing seat 18 and the second vertical fixing seat 21 are respectively rotatable around the vertical axis and inserted into the first angle adjustment sleeve 24 and the second angle adjustment sleeve 25. The first angle adjustment sleeve 24 and the second angle adjustment sleeve 25 are also respectively movably threaded with a sixth adjustment handle 26 and a seventh adjustment handle. The stud ends of the sixth adjustment handle 26 and the seventh adjustment handle can be tightly pressed against the outer circumferential surface of the first vertical fixing seat 18 and the second vertical fixing seat 21, so that the first vertical fixing seat 18 and the second vertical fixing seat 21 are respectively locked with the first angle adjustment sleeve 24 and the second angle adjustment sleeve 25 at any angle position.

[0035] By adjusting the first vertical fixing seat 18 and the second vertical fixing seat 21 in principle direction, it can adapt to the angle between the handle parts at both ends of the horizontal handle 28 and the middle part of the handle, as well as the angle between different brake handles 29 and the handle parts of the horizontal handle 28.

[0036] The base 1 is also fixed with a front-to-back position scale and a left-to-right position scale. The front-to-back adjustment slider 7 and the left-to-right adjustment slider 15 can respectively align with the scales on the front-to-back position scale and the left-to-right position scale. The handlebar height adjustment slider 9, the first vertical sliding rod 19, and the second vertical sliding rod 22 are also respectively provided with height position scales. The upper end surfaces of the front-to-back adjustment slider 7, the first vertical fixing seat 18, and the second vertical fixing seat 21 can respectively align with the scales on the height position scale. By providing the scales, the positions of the handlebar main positioning block, the handlebar auxiliary positioning block 2, and the brake handle support block 3 can be accurately adjusted.

Claims

1. A brake handle assembly jig, characterized by: The utility model comprises a base (1), a main horizontal handle positioning block, an auxiliary horizontal handle positioning block (2), a brake handle support block (3), an auxiliary positioning height adjustment mechanism and a brake handle height adjustment mechanism, wherein the main horizontal handle positioning block can be fixedly positioned on the base, the main horizontal handle positioning block can fix the middle part of the horizontal handle (28), two auxiliary horizontal handle positioning blocks can be installed on the base so as to move up and down in the vertical direction, and the two auxiliary horizontal handle positioning blocks are respectively located on both sides of the main horizontal handle positioning block along the extension direction of the horizontal handle, and the handle parts of the two ends of the horizontal handle for installing the brake handle (29) can be respectively positioned on the auxiliary horizontal handle positioning blocks, the two brake handle support blocks can be installed on the base so as to move up and down in the vertical direction, and the two brake handle support blocks and the two auxiliary horizontal handle positioning blocks are respectively connected. The blocks are arranged opposite each other, and the two brake handles installed on the handle portion of the horizontal handle can be supported on the surface of the brake handle support block. The auxiliary positioning height adjustment mechanism and the brake handle height adjustment mechanism can respectively adjust the heights of the two horizontal handle auxiliary positioning blocks and the brake handle support block. The base is also provided with a front and rear adjustment rail (6) and a front and rear adjustment slider (7). The extension direction of the front and rear adjustment rail is perpendicular to the axial extension direction of the horizontal handle. The front and rear adjustment slider can be slidably installed on the front and rear adjustment rail. The front and rear adjustment slider is also provided with a second adjustment handle (8). The stud of the second adjustment handle can be tightly positioned with any position of the front and rear adjustment rail. The main positioning block of the horizontal handle is installed on the front and rear adjustment slider. The base is also provided with a The left and right adjustment rails (14) and the left and right adjustment sliders (15) are respectively provided with the extension direction of the left and right adjustment rails and the axial extension direction of the horizontal handlebar. The two left and right adjustment rails are respectively located on both sides of the front and rear adjustment rails along the axial extension direction of the horizontal handlebar. The left and right adjustment sliders can be slidably installed on the left and right adjustment rails. The left and right adjustment sliders are also provided with a third adjustment handle. The stud of the third adjustment handle can be tightly positioned with any position of the left and right adjustment rails. The horizontal handle auxiliary positioning block and the brake handle support block are respectively installed on the left and right adjustment sliders. There are also auxiliary positioning horizontal adjustment blocks (16) and brake positioning horizontal adjustment blocks (17). The auxiliary positioning horizontal adjustment blocks and the brake positioning horizontal adjustment blocks can be slidably installed on the left and right adjustment rails. On the slider, the auxiliary positioning horizontal adjustment block and the brake positioning horizontal adjustment block can slide along the sliding direction of the front and rear adjustment sliders and the left and right adjustment sliders respectively. The auxiliary positioning horizontal adjustment block and the brake positioning horizontal adjustment block are also provided with positioning screws. The positioning screws can fix the auxiliary positioning horizontal adjustment block and the brake positioning horizontal adjustment block with the left and right adjustment sliders at any position. The auxiliary positioning height adjustment mechanism includes a first vertical fixing seat (18), a first vertical sliding rod (19) and a fourth adjustment handle (20). The first vertical fixing seat is installed on the auxiliary positioning horizontal adjustment block. The first vertical sliding rod can be inserted into the first vertical fixing seat for sliding in the vertical direction. The fourth adjustment handle is movably threadedly connected to the first vertical fixing seat.The stud end of the fourth adjustment handle can be pressed against the surface of the first vertical sliding rod so that it can be locked and positioned with the first vertical fixed seat at any height position. The brake handle height adjustment mechanism includes a second vertical fixed seat (21), a second vertical sliding rod (22) and a fifth adjustment handle (23). The second vertical fixed seat is installed on the brake positioning horizontal adjustment block. The second vertical sliding rod can be inserted into the second vertical fixed seat by sliding in the vertical direction. The fifth adjustment handle is movably threadedly connected to the second vertical fixed seat. The stud end of the fifth adjustment handle can be pressed against the surface of the second vertical sliding rod so that it can be locked and positioned with the second vertical fixed seat at any height position. The horizontal handle auxiliary positioning block and the brake handle support block are respectively fixedly installed on the upper ends of the first vertical sliding rod and the second vertical sliding rod. The brake handle support block is provided with a brake support groove (27) for supporting and positioning the brake handle.

2. The brake handle assembly jig according to claim 1, characterized in that: A baffle support rod (4) is fixedly provided on the auxiliary positioning block of the horizontal handlebar located on one side of the main positioning block of the horizontal handlebar, and the extension direction of the baffle support rod is the same as the extension direction of the handle at one end of the horizontal handlebar. A horizontal handlebar length baffle (30) is slidably installed on the baffle support rod, and the horizontal handlebar length baffle is stopped on the end surface of the handle at one end of the horizontal handlebar. A first adjustment handle is also movably connected to the horizontal handlebar length baffle with a thread, and the stud of the first adjustment handle can be tightly positioned with the baffle support rod at any position. A length size scale line (5) is provided on the baffle support rod, and the horizontal handlebar length baffle can be aligned with the scale on the length size scale line.

3. The brake handle assembly jig according to claim 1, characterized in that: A vertical rod positioning block (31) is mounted on the horizontal handle main positioning block and can rotate around a horizontal rotation axis. The vertical rod positioning block is provided with a vertical rod receiving groove, and the vertical rod fixedly connected to the horizontal handle can be supported in the vertical rod receiving groove.

4. The brake handle assembly jig according to claim 1, characterized in that: The front and rear adjustment sliders are also provided with a horizontal handle height adjustment slider (9) which can slide in the vertical direction. The horizontal handle height adjustment slider is provided with an eighth adjustment handle (10). The stud of the eighth adjustment handle can be pressed and positioned at any position of the front and rear adjustment sliders. The horizontal handle main positioning block is fixedly installed on the horizontal handle height adjustment slider.

5. The brake handle assembly jig according to claim 1 or 4, characterized in that: The main positioning block of the horizontal handlebar includes a horizontal handlebar fixing plate (11), a horizontal handlebar intermediate fixed supporting block (12) and a horizontal handlebar diameter anti-cracking mold (13). The two horizontal handlebar intermediate fixed supporting blocks are arranged on the horizontal handlebar fixing plate at intervals along the axial extension direction of the horizontal handlebar. The horizontal handlebar intermediate fixed supporting blocks are formed with an arc-shaped groove-shaped supporting surface. The middle part of the horizontal handlebar can be supported on the supporting surfaces of the two horizontal handlebar intermediate fixed supporting blocks. The horizontal handlebar diameter anti-cracking mold can be detachably installed on the horizontal handlebar fixing plate. The horizontal handlebar diameter anti-cracking mold is formed with a U-shaped anti-cracking groove that matches the diameter and bending radius of the assembled horizontal handlebar. The middle part of the horizontal handlebar supported on the two horizontal handlebar intermediate fixed supporting blocks can be inserted into the U-shaped anti-cracking groove on the horizontal handlebar diameter anti-cracking mold.

6. The brake handle assembly jig according to claim 1, characterized in that: The auxiliary positioning horizontal adjustment block and the brake positioning horizontal adjustment block are respectively provided with a first angle adjustment sleeve (24) and a second angle adjustment sleeve (25), the first vertical fixing seat and the second vertical fixing seat are respectively rotatable around the vertical axis and inserted into the first angle adjustment sleeve and the second angle adjustment sleeve, and the first angle adjustment sleeve and the second angle adjustment sleeve are respectively movably threaded with a sixth adjustment handle (26) and a seventh adjustment handle, the stud ends of the sixth adjustment handle and the seventh adjustment handle can be tightly pressed against the outer circumferential surface of the first vertical fixing seat and the second vertical fixing seat, so that the first vertical fixing seat and the second vertical fixing seat are respectively locked with the first angle adjustment sleeve and the second angle adjustment sleeve at any angle position.

7. The brake handle assembly jig according to claim 1, characterized in that: The base is also fixed with a front and rear position scale and a left and right position scale, and the front and rear adjustment sliders and the left and right adjustment sliders can respectively face the scales on the front and rear position scale and the left and right position scale. The horizontal handle height adjustment slider, the first vertical sliding rod and the second vertical sliding rod are also respectively provided with height position scales, and the upper end surfaces of the front and rear adjustment slider, the first vertical fixing seat and the second vertical fixing seat can respectively face the scales on the height position scale.

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