Vehicle frame clamping and positioning mechanism

Abstract

The utility model belongs to the technical field of moped machining, and discloses a frame clamping and positioning mechanism. The device comprises a base, the base is arranged on the lower side of a CNC boring cutter, a clamping component, a first lap joint rod and a second lap joint rod are installed on the base, the clamping component comprises an air cylinder and a compression joint part, the air cylinder is fixed to the base and drives the compression joint part to move perpendicular to the plane of the base, a five-way part of a frame is placed on the lower side of the compression joint part, and a middle pipe of the frame is in lap joint with the first lap joint rod. A main beam of the frame is lapped on the second lapping rod; the crimping part is in an L shape, a first opening is formed in the upper side of the crimping part, an annular crimping block is installed on the crimping part, the crimping block abuts against the five-way part, a second opening is formed in the crimping block, and the CNC boring cutter sequentially penetrates through the first opening and the second opening. The problem that in the prior art, the error of machining a threaded hole in the five-way part is high is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of power-assisted vehicle processing, in particular to a frame clamping and positioning mechanism. Background Art

[0002] During the manufacturing process of the electric power-assisted bicycle, the five-way part of the electric power-assisted bicycle needs to be precisely processed. The five-way part is located at the rotating shaft of the frame and the pedals. At the bottom end of the frame, a through hole with a thread needs to be processed in the five-way part.

[0003] Under the existing technology, the frame is placed vertically on a horizontal plane, the clamp is at the bottom of the frame, the two sides of the frame are clamped, the frame is fixed, and the processing tool is laterally inserted from the left and right sides of the frame into the five-way position for processing. However, since the frame is placed vertically, the center of gravity of the frame itself is higher than the placement plane, and the clamping position is far away from the five-way position. When processing, the frame is made of metal and has a certain elasticity. The frame will swing around the clamping position driven by the tool. The farther the distance between the clamping position and the five-way position, the greater the swing amplitude of the frame itself, which will eventually cause errors in the processed threads and reduce the processing accuracy. Utility Model Content

[0004] The utility model aims to provide a frame clamping and positioning mechanism to solve the problem of high error in processing threaded holes at the five-way position in the prior art.

[0005] To achieve this purpose, the utility model adopts the following technical solutions: the utility model provides a frame clamping and positioning mechanism, including a base, the base is placed on the lower side of a CNC boring tool, a clamping member, a first lap rod and a second lap rod are installed on the base, the clamping member includes a cylinder and a crimping member, the cylinder is fixed on the base, the cylinder drives the crimping member to move perpendicular to the plane of the base, a five-way portion of the frame is placed on the lower side of the crimping member, the middle tube of the frame is overlapped on the first lap rod, and the main beam of the frame is overlapped on the second lap rod;

[0006] The crimping piece is L-shaped, with a first opening formed on the upper side of the crimping piece. An annular crimping block is installed on the crimping piece, the crimping block abuts against the five-way portion, and a second opening is formed on the crimping block. The CNC boring tool passes through the first opening and the second opening in sequence.

[0007] Preferably, the frame clamping and positioning mechanism also includes a rotating disk and a fixed part, the five-way part of the frame is placed on the fixed part, the rotating disk is sleeved on the outside of the fixed part, the rotating disk rotates around the fixed part, and the first lap rod is installed in the screw hole of the rotating disk through a first bolt.

[0008] Preferably, a first communication port is provided on the fixing portion, a second communication port is provided on the base, one side of the second communication port is connected with the first communication port, and a drain pipe is installed on the other side of the second communication port.

[0009] Preferably, a first positioning hole is formed on the rotating disk, a second positioning hole is formed on the base, and a positioning pin is inserted into the first positioning hole and the second positioning hole.

[0010] Preferably, a positioning block is installed on the first overlapping rod, an arc-shaped groove is formed on the positioning block, and the middle tube is overlapped in the arc-shaped groove.

[0011] Preferably, a first fixing hole is provided on the base, and at least one group of second fixing holes is provided on the second overlapping rod. The second fixing holes are distributed along the length direction of the second overlapping rod. The second bolt passes through the first fixing hole and the second fixing hole and is screwed to the second nut.

[0012] Preferably, a positioning rod is rotatably mounted on the front end of the second overlapping rod, and the positioning rod rotates along an axis perpendicular to the base, and the main beam is overlapped on the positioning rod.

[0013] Preferably, two groups of arc-shaped holes are provided on the outer side of the second opening, and six groups of first through holes are distributed circumferentially on the outer side of the first opening. The third bolt passes through the first through holes and the arc-shaped holes and is screwed to the third nut.

[0014] Preferably, two sets of clamping members are installed on the base, and the clamping members, the first overlapping rods and the second overlapping rods correspond to each other one by one. A notch is formed on the edge of the base, and the fourth bolt passes through the notch and is inserted into the slide groove of the processing table and then screwed to the fourth nut.

[0015] Beneficial effects: The utility model can square the frame on the base, and at the same time, the middle tube and the main beam are respectively overlapped on the first overlap rod and the second overlap rod to provide multiple groups of support points for the frame, so that the frame posture is stable. Since the frame is in a square state at this time, the center of gravity of the frame will be lowered and the amplitude of shaking will be reduced. At the same time, the CNC boring tool used to process the five-way part of the frame processes vertically downward, passes through the crimping piece and the crimping block for thread processing, and the CNC boring tool passes through the first opening and the second opening, so that the position of the clamping member and the processing position of the CNC boring tool are almost coincident, and the vibration generated during the processing will be suppressed by the circumferential crimping block, thereby reducing the amplitude of the frame's own shaking during the processing. The processing position of the CNC boring tool is in the crimping area of ​​the crimping piece, which can suppress vibration. The frame is clamped in the vertical direction by the clamping member to suppress vibration, and finally the amplitude of vibration generated on the frame will be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a working schematic diagram of the frame clamping and positioning mechanism of the utility model;

[0017] Figure 2 This is the main body diagram of the drainage pipe side of the frame clamping and positioning mechanism of the utility model;

[0018] Figure 3 It is a main body diagram of the cylinder side of the frame clamping and positioning mechanism of the utility model.

[0019] In the figure: 1. base; 11. notch; 12. drain pipe; 2. cylinder; 3. crimping piece; 31. first opening; 32. first through hole; 4. frame; 41. five-way portion; 42. middle pipe; 43. main beam; 5. first lap rod; 51. positioning block; 52. arc groove; 6. second lap rod; 61. positioning rod; 7. crimping block; 71. second opening; 72. arc hole; 8. fixing portion; 81. first connecting port; 9. rotating disk. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0021] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0023] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0024] Under the existing technology, the frame is generally placed vertically on a horizontal plane, the bottom bracket part is set at the upper end, and then the processing tool moves along the horizontal direction to process the threads on the bottom bracket part of the frame. The bottom of the frame is fixed by a clamp. Since the processing position is far from the clamping position, the frame will swing around the clamping position under the push of the processing tool, which will cause a large error in the threads processed at the bottom bracket part, thereby reducing the processing accuracy.

[0025] In order to solve the above problems, Figures 1 to 3 As shown, the utility model provides a frame clamping and positioning mechanism, in which a CNC cutting method is selected to process the five-way portion 41 of the frame 4 in order to improve the processing accuracy, which can improve the processing accuracy. The frame clamping and positioning mechanism includes a base 1, which is placed on the lower side of the CNC boring tool, and a clamping member, a first lap rod 5 and a second lap rod 6 are installed on the base 1. The clamping member includes a cylinder 2 and a crimping member 3. The cylinder 2 is fixed on the base 1, and the cylinder 2 drives the crimping member 3 to move perpendicular to the plane of the base 1. The crimping member 3 moves downward and will be crimped on the frame 4. The five-way portion 41 of the frame 4 is placed on the lower side of the crimping member 3, the middle tube 42 of the frame 4 is overlapped on the first lap rod 5, and the main beam 43 of the frame 4 is overlapped on the second lap rod 6. The frame 4 is squared on the base 1 by means of the cylinder 2, the first overlapping rod 5 and the second overlapping rod 6, wherein the crimping piece 3 on the cylinder 2 can fix the frame 4, and the first overlapping rod 5 and the second overlapping rod 6 can keep the frame 4 in a horizontal state and installed on the base 1. Since the frame 4 is processed in a horizontal state, the vibration generated during the processing will be absorbed by the first overlapping rod 5 and the second overlapping rod 6. In addition, since the center of gravity of the frame 4 is close to the lowest installation position of the frame 4, the vibration amplitude generated by the frame 4 during processing will be reduced.

[0026] The crimping piece 3 is L-shaped, with a first opening 31 formed on the upper side of the crimping piece 3 , an annular crimping block 7 is mounted on the crimping piece 3 , the crimping block 7 abuts against the five-way portion 41 , and a second opening 71 is formed on the crimping block 7 , and the CNC boring tool passes through the first opening 31 and the second opening 71 in sequence.

[0027] The crimping piece 3 is inverted in an L shape on the base 1, and the space on the lower side of the crimping piece 3 is provided with the five-way portion 41 of the frame 4. The crimping piece 3 is crimped to the edge of the five-way portion 41 through the crimping block 7. The CNC boring tool passes through the first opening 31 and the second opening 71 to process the inside of the five-way portion 41, which will cause the vibration generated by the five-way portion 41 to be absorbed by the crimping block 7. The tendency of the frame 4 to shake caused by the CNC boring tool will be directly suppressed by the outer crimping block 7, thereby reducing the amplitude of the vibration of the frame 4. At the same time, since the position of clamping the frame 4 is located in the circumference of the five-way portion 41, the distance between the position of clamping the frame 4 and the processing position of the five-way portion 41 is shortened, thereby further reducing the amplitude of the shaking of the frame 4, and making the CNC boring tool process the threads of the five-way portion 41 with higher accuracy.

[0028] The frame clamping and positioning mechanism also includes a rotating disk 9 and a fixed portion 8. The five-way portion 41 of the frame 4 is placed on the fixed portion 8. The rotating disk 9 is sleeved on the outside of the fixed portion 8. The rotating disk 9 rotates around the fixed portion 8. The first lap rod 5 is installed in the screw hole of the rotating disk 9 through the first bolt.

[0029] By rotating the rotating disk 9, the position of the first overlapping rod 5 can be changed so that the first overlapping rod 5 can be rotated around the fixing portion 8. Since two sets of clamping components and the corresponding first overlapping rods 5 and second overlapping rods 6 are installed on the base 1 of the utility model, two sets of frames 4 can be clamped on the base 1 at the same time, which can improve the processing efficiency. Therefore, by adjusting the positions of the two sets of first overlapping rods 5, the two sets of frames 4 can be installed on the base 1 at the same time to avoid mutual interference.

[0030] A first connecting port 81 is provided on the fixing portion 8, and a second connecting port is provided on the base 1. One side of the second connecting port is connected to the first connecting port 81, and a drain pipe 12 is installed on the other side of the second connecting port. When CNC processing is performed, a large amount of cutting fluid will be sprayed out. After passing through the five-way portion 41, the cutting fluid will flow out along the first connecting port 81, the second connecting port and the drain pipe 12, and can be recycled to avoid wasting the cutting fluid.

[0031] A first positioning hole is formed on the rotating disk 9, and a second positioning hole is formed on the base 1. The positioning pins are inserted into the first positioning hole and the second positioning hole. The second positioning holes may include multiple groups, and then after the rotating disk 9 is rotated, the rotating disk 9 and the base 1 can be fixed by the positioning pins, so that the first lap rod 5 can remain stable during the processing process.

[0032] A positioning block 51 is installed on the first lap rod 5, and an arc groove 52 is formed on the positioning block 51, and the middle tube 42 is overlapped in the arc groove 52. Since the first lap rod 5 needs to cooperate with the middle tube 42 on the frame 4, the middle tube 42 is placed in the arc groove 52 to limit the frame 4 and improve the stability of the frame 4 during the processing. The positioning block 51 is slidably installed on the first lap rod 5, and can be used to adapt to the frame 4 with different lengths of the middle tube 42, thereby improving the versatility of the frame clamping and positioning mechanism.

[0033] A first fixing hole is provided on the base 1, and at least one group of second fixing holes is provided on the second lap rod 6. The second fixing holes are distributed along the length direction of the second lap rod 6. The second bolt passes through the first fixing hole and the second fixing hole and is screwed to the second nut.

[0034] The second overlapping rod 6 is detachably connected to the base 1. Since the second fixing holes include multiple groups, the installation position of the second overlapping rod 6 can be changed. By adjusting the installation position of the second overlapping rod 6, it can adapt to frames 4 of different sizes, thereby improving the versatility of the frame clamping and positioning mechanism.

[0035] The front end of the second lap rod 6 of the utility model is rotatably mounted with a positioning rod 61, which rotates along the axis of the vertical base 1, and the positioning rod 61 overlaps the main beam 43. By adjusting the position of the positioning rod 61, the main beam 43 of the frame 4 can be overlapped on the positioning rod 61, so that the frame 4 and the base 1 can achieve three-point contact, thereby improving the stability of the frame 4 during the processing process.

[0036] Two groups of arc holes 72 are formed outside the second opening 71 , and six groups of first through holes 32 are distributed circumferentially outside the first opening 31 . The third bolt passes through the first through holes 32 and the arc holes 72 and is screwed to the third nut.

[0037] The two groups of arc-shaped holes 72 can enable the crimping block 7 to be rotatably fixed on the crimping member 3, so that the crimping block 7 can be stably crimped on vehicle frames 4 with different structures, with a higher degree of adaptability.

[0038] The clamping member, the first lap rod 5 and the second lap rod 6 correspond to each other. A notch 11 is formed at the edge of the base 1. The fourth bolt passes through the notch 11 and is inserted into the slide groove of the processing table and then screwed to the fourth nut.

[0039] The installation position of the base 1 can be changed along the length direction of the slide slot, so as to be adapted to the processing area of ​​the CNC boring tool above, making the processing method of the frame 4 more flexible.

[0040] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A frame clamping and positioning mechanism, characterized in that: The invention comprises a base (1), wherein the base (1) is placed on the lower side of a CNC boring tool, a clamping member, a first lap rod (5) and a second lap rod (6) are installed on the base (1), the clamping member comprises a cylinder (2) and a crimping member (3), the cylinder (2) is fixed on the base (1), the cylinder (2) drives the crimping member (3) to move perpendicularly to the plane of the base (1), a five-way portion (41) of a frame (4) is placed on the lower side of the crimping member (3), a middle tube (42) of the frame (4) is lapped on the first lap rod (5), and a main beam (43) of the frame (4) is lapped on the second lap rod (6); The crimping piece (3) is L-shaped, a first opening (31) is formed on the upper side of the crimping piece (3), an annular crimping block (7) is mounted on the crimping piece (3), the crimping block (7) abuts against the five-way portion (41), a second opening (71) is formed on the crimping block (7), and the CNC boring tool passes through the first opening (31) and the second opening (71) in sequence.

2. The frame clamping and positioning mechanism according to claim 1, characterized in that: The frame clamping and positioning mechanism also includes a rotating disk (9) and a fixed portion (8), the five-way portion (41) of the frame (4) is placed on the fixed portion (8), the rotating disk (9) is sleeved on the outside of the fixed portion (8), the rotating disk (9) rotates around the fixed portion (8), and the first lap rod (5) is installed in the screw hole of the rotating disk (9) by a first bolt.

3. The frame clamping and positioning mechanism according to claim 2, characterized in that: The fixing portion (8) is provided with a first communication port (81), the base (1) is provided with a second communication port, one side of the second communication port is connected to the first communication port (81), and the other side of the second communication port is provided with a drainage pipe (12).

4. The frame clamping and positioning mechanism according to claim 2, characterized in that: A first positioning hole is formed on the rotating disk (9), a second positioning hole is formed on the base (1), and a positioning pin is inserted into the first positioning hole and the second positioning hole.

5. The frame clamping and positioning mechanism according to claim 1, characterized in that: A positioning block (51) is installed on the first overlapping rod (5), an arc-shaped groove (52) is formed on the positioning block (51), and the middle tube (42) is overlapped in the arc-shaped groove (52).

6. The frame clamping and positioning mechanism according to claim 1, characterized in that: The base (1) is provided with a first fixing hole, the second lap rod (6) is provided with at least one group of second fixing holes, the second fixing holes are distributed along the length direction of the second lap rod (6), and the second bolt passes through the first fixing hole and the second fixing hole and is screwed to the second nut.

7. The frame clamping and positioning mechanism according to claim 1, characterized in that: A positioning rod (61) is rotatably mounted on the front end of the second overlapping rod (6); the positioning rod (61) rotates along an axis perpendicular to the base (1); and the positioning rod (61) overlaps the main beam (43).

8. The frame clamping and positioning mechanism according to claim 1, characterized in that: Two groups of arc-shaped holes (72) are provided on the outside of the second opening (71), and six groups of first through holes (32) are distributed circumferentially on the outside of the first opening (31); the third bolt passes through the first through hole (32) and the arc-shaped hole (72) and is screwed to the third nut.

9. The frame clamping and positioning mechanism according to claim 1, characterized in that: Two groups of clamping members are installed on the base (1), and the clamping members, the first lap rod (5) and the second lap rod (6) correspond to each other one by one. A notch (11) is formed on the edge of the base (1), and a fourth bolt passes through the notch (11) and is inserted into a slide groove of the processing table and then screwed to a fourth nut.

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