TWI833486B - Jig for bicycle fork seat - Google Patents

Abstract

A jig for bicycle fork seat includes a workbench, two fixed bases and two clamp devices. The workbench has first and second positions respectively corresponding to left and right block portions of a blank. Two fixed bases are disposed on the first and second positions to support the left and right block portions, thereby hanging the middle block portion of the blank in the air. A lower protrusion is disposed at top of the fixed base to abut against bottom of the left and right block portions. The clamp device includes a driving member, a driven member and a clamp member connected with the driven member. The driving member drives the driven member and the clamp member to move downward so as to press upon the left and right block portions. An upper protrusion is disposed at bottom of the clamp member to abut against top of the left and right block portions.

Description

Bicycle front fork seat machining jig

The present invention relates to a processing jig, in particular to a processing jig for a bicycle front fork base.

The front fork of a bicycle connects the wheel axle and the steering handle, allowing the user to manipulate the steering handle to control the swing of the wheel and change the direction of travel. It is one of the important parts, and the front fork seat is the basic component of the front fork. With the popularity of bicycle sports in recent years, the industry has begun to have higher decorative and design requirements for the external shape of the front fork mount, especially for higher-end products. Therefore, the workpiece must be carefully paid attention to during the manufacturing process. Even when using a jig to fix the workpiece, do not clamp it too tightly to avoid damaging the surface of the workpiece. However, the workpiece must still be firmly positioned before processing, so it is necessary to develop a special jig corresponding to this processing process.

In order to solve the above problems, the present invention provides a processing jig for a bicycle front fork seat, in which the green body of the front fork seat before processing has a middle block, a left block and a right block; the processing jig includes have: A workbench, which is defined as having a first position and a second position; Two fixed bases are respectively provided at the first position and the second position to support the left block and the right block, and to allow the middle block to be suspended above the workbench. The top of the fixed base A protrusion is provided on the surface for supporting the bottom ends of the left block and the right block; Two clamping devices are respectively provided at the first position and the second position. Each clamping device includes a driving part, a driven part and a clamping part, and the clamping part is fixed on the driven part, The driving member drives the driven member and the clamping member to move from top to bottom to press the left block and the right block. The bottom surface of the clamping member is provided with an upper protruding portion for supporting the The top ends of the left block part and the right block part.

In one embodiment, the first position and the second position of the workbench are respectively provided with a chip guide ramp block so that the chips can be concentrated between the two chip guide ramp blocks.

Preferably, each fixed base includes a front seat and a rear seat, respectively located on both sides of the chip guide ramp block, and the lower protrusion is provided on the top surfaces of the front seat and the rear seat for support. At the edges of the bottom ends of the left block and the right block.

Preferably, it further includes a workpiece positioning mechanism, which includes a driving device, two displacement blocks and two push blocks, wherein the two push blocks are respectively located at the first position and the second position and fixed. On the corresponding displacement block, the driving device can drive the two displacement blocks to move toward each other at the same time, and synchronously drive the two push blocks to push the left block and the right block respectively, thereby pushing the blank to a predetermined position.

Each of the above-mentioned pushing blocks forms a V shape respectively.

Preferably, the workbench is elevated and has a lower space, and the driving device and the displacement block are arranged in the lower space.

Furthermore, the first position and the second position of the workbench are respectively provided with a chip guide ramp block and a groove penetrating to the lower space. The bottom of the chip guide ramp block is provided with a connecting block, and the connecting block passes through The groove is fixed on the corresponding displacement block, and the two pushing blocks are respectively fixed on the two chip guide ramp blocks.

Please refer to Figures 1 and 2, which show a processing jig for a bicycle front fork seat provided by the present invention. It is used in the preliminary processing process of the front fork seat, that is, it refers to the prototype of the front fork seat. (Including a left block, a right block and a middle block), rough machining processes such as drilling and milling are about to begin. The figure shows two sets of devices for fixing the front fork mount, and only one of them will be described below.

The processing jig of the present invention includes a workbench 1, two fixed bases 2, two clamping devices 3 and a workpiece positioning mechanism 4. The workbench 1 is elevated by a plurality of pillars 11 and is suspended in the air, thereby forming a lower space 10 below the workbench 1 . The workbench 1 is defined with a first position 51 and a second position 52 separated by a certain distance. The first position 51 is equipped with a fixed base 2 and a clamping device 3, and the second position 52 is equipped with another A fixed base 2 and another clamping device 3.

In this embodiment, the first position 51 and the second position 52 of the workbench 1 are each further equipped with a chip guide ramp block 6. Each chip guide ramp block 6 has a slope surface and faces each other to divert the chips. Concentrate between the two chip guiding ramps 6. Each of the above-mentioned fixed bases 2 is divided into a front seat part 21 and a rear seat part 22, which are respectively arranged on both sides of the chip guide ramp block 6 and higher than the chip guide ramp block 6. The front seat part 21 and the rear seat part 22 are The top surface protrudes upward to form an elongated lower protrusion 23 . The fixed base 2 is used to support the left and right block parts of the front fork base body; specifically, when the base body is placed on the workbench 1, the left and right block parts are straddled on the corresponding guides. Above the chip slope block 6, the front and rear edges are respectively supported on the front seat 21 and the rear seat 22. To further explain, with reference to Figure 7, the front and rear edges of the left and right block parts are supported on the lower protruding part 23; in other words, the left and right block parts are not connected with the front seat part 21 and the rear seat part 21. The entire area of the seat portion 22 is in contact with only the lower protruding portion 23 .

In addition, referring to FIG. 5 , the height of the fixed base 2 is designed such that when the left and right blocks 71 and 72 are placed in the aforementioned manner, the middle block 73 will be suspended above the workbench 1 .

The workpiece positioning mechanism 4 is used to move the front fork base body placed on the fixed base 2 to a predetermined position. As shown in FIG. 2 , the workpiece positioning mechanism 4 includes a driving device 41 , two displacement blocks 42 and two pushing blocks 43 . The driving device 41 and the two displacement blocks 42 are located in the lower space 10 below the workbench 1 . , the driving device 41 can drive the two displacement blocks 42 to generate mutual displacement at the same time. The driving device 41 can be implemented in many ways, such as a piston rod driven by oil pressure or pneumatic pressure, a screw slide driven by an electric motor, etc., which are not limited here. The workbench 1 is respectively provided with a groove 12 penetrating to the lower space 10 at the first position 51 and the second position 52. The bottom of the two chip guide ramp blocks 6 has a connecting block 61, and the connecting block 61 passes through The groove 12 is fixed on the corresponding displacement block 42, and the two push blocks 43 are respectively fixed on the two chip guide ramp blocks 6. Accordingly, when the driving device 41 drives the two displacement blocks 42 to move, each chip guide ramp The block 6 and each pushing block 43 can be driven by the corresponding displacement block 42 synchronously. In this embodiment, each pushing block 43 is formed into a V shape, which can form a semi-enveloping shape for the left and right blocks of the base body.

With the above device, the operator places the blank 7 on the workbench 1 as shown in Figure 3, that is, the left and right block parts 71 and 72 are respectively placed on a fixed base 2. At this time, the left and right block parts 71 and 72 are resisted by a push block 43 respectively. Then, as shown in FIG. 4 , the driving device is used to control the two displacement blocks to move toward each other at the same time, so that the two push blocks 43 move the left and right block portions 71 and 72 respectively. Since the movement distance of the two push blocks 43 is the same but in opposite directions, no matter where the blank 7 is initially placed, it will eventually be pushed to a predetermined position, which is the center of the area between the two push blocks 43 position, so that the blank 7 reaches the position for subsequent use of a jig for fixation.

Referring again to Figures 5 and 6, the clamping device 3 includes a driving member 31, a driven member and a clamping member 32, wherein the clamping member 32 is fixed on the driven member, and the driving member 31 is connected to the driven member. The moving member then drives the driven member to move from top to bottom with the clamping member 32, thereby pressing the left and right block portions of the blank. In this embodiment, the driving member 31 is a telescopic hydraulic cylinder or an electric cylinder that can change the length, which is not limited here, and the driven member includes a first link pivotally connected to the driving member 31 33 and a second link 34 pivotally connected to the fixed end, wherein the second link 34 is also pivotally connected to the first link 33 with a pivot portion 35, and the clamping member 32 is fixed on the On the first connecting rod 33. As shown in FIG. 6 , when the driving member 31 extends upward, the first link 33 will be pushed to swing with the pivot portion 35 as a rotating axis, thereby causing the clamping member 32 to swing downward to form a downward movement. The action of pressing down on the left and right blocks 71 and 72 of the green body.

The bottom surface of the clamping member 32 protrudes downward to form an elongated upper protrusion 36. When the clamping member 32 is driven to swing toward the left and right blocks of the blank, the clamping member 32 only The upper protrusion 36 contacts the top ends of the left and right blocks. As for the left and right block portions 71 and 72, as shown in Figure 7, after being fixed on the workbench, their top and bottom ends are only in contact with the upper protruding portion 36 and the lower protruding portion 23, respectively. This can reduce the contact area to reduce the chance of damaging the workpiece surface due to contact.

Through the above structure, the jig of the present invention can first ensure that the base body 7 is positioned at the position to be processed, and then fix the base body 7 through the clamping device 3. On the premise of stabilizing the base body 7, the present invention also uses The area of contact with the base body 7 is reduced to reduce damage to the surface of the workpiece. After the base body 7 is stably fixed in the aforementioned structure, drilling operations can be performed on the left block 71 , the right block 72 and the middle block 73 as shown in Figure 8 , and on the middle block 73 as shown in Figure 9 Milling operations at the bottom.

1: workbench 10: Lower space 11:Pillar 12:Trench 2: Fixed base 21:Front seat 22: Rear seat 23: Lower protrusion 3: Clamping device 31:Driving parts 32: Clamping piece 33:First connecting rod 34:Second connecting rod 35: Pivot joint 36: Upper protrusion 4: Workpiece positioning mechanism 41:Driving device 42: Displacement block 43: Push block 51:First position 52:Second position 6: Chip guide ramp 61:Connection block 7:Base 71:Left block 72:Right block 73:Middle block part

Figure 1 is a three-dimensional schematic diagram of the present invention; Figure 2 is a three-dimensional exploded schematic diagram of the present invention; Figures 3 and 4 are schematic diagrams of the action state of the positioning front fork base of the present invention; Figures 5 and 6 are schematic diagrams of the action state of the clamping front fork base of the present invention; Figure 7 is a partially enlarged schematic diagram of Figure 6; Figures 8 and 9 are schematic diagrams of the use state of the present invention when processing workpieces.

1: workbench

10: Lower space

11:Pillar

2: Fixed base

3: Clamping device

4: Workpiece positioning mechanism

Claims (6)

A processing jig for a bicycle front fork seat, wherein the green body of the front fork seat before processing has a middle block, a left block and a right block; the processing jig includes: a workbench, whose definition There is a first position and a second position, each of which is provided with a chip guide ramp block to concentrate the chips between the two chip guide ramp blocks; two fixed bases are respectively provided at the first position and the second position. The position is used to support the left block and the right block, and to allow the middle block to be suspended above the workbench. The top surface of the fixed base is provided with a protrusion for supporting the left block. and the bottom end of the right block; two clamping devices are respectively located at the first position and the second position. Each clamping device includes a driving member, a driven member and a clamping member. The piece is fixed on the driven piece, and the driving piece drives the driven piece and the clamping piece to move from top to bottom to press the left block and the right block. The bottom surface of the clamping piece is provided with a The upper protruding portion is used for supporting the top ends of the left block portion and the right block portion. The processing jig for a bicycle front fork seat as described in claim 1, wherein each fixed base includes a front seat part and a rear seat part, respectively located on both sides of the chip guide ramp block, and the lower protruding part is provided on the front seat part and the top surface of the rear seat part for supporting the edges of the bottom ends of the left block part and the right block part. The processing jig for a bicycle front fork seat as described in claim 1, which further includes a workpiece positioning mechanism. The workpiece positioning mechanism includes a driving device, two displacement blocks and two push blocks, two of which push blocks. They are respectively provided at the first position and the second position and fixed on the corresponding displacement block. The driving device can drive the two displacement blocks. At the same time, they move toward each other, synchronously driving the two pushing blocks to push the left block part and the right block part respectively, and then push the green body to a predetermined position. The processing jig for a bicycle front fork seat as described in claim 3, wherein each of the pushing blocks forms a V shape. The processing jig for a bicycle front fork seat as described in claim 3, wherein the workbench is elevated to have a lower space, and the driving device and the displacement block are arranged in the lower space. The processing jig for a bicycle front fork base as described in claim 5, wherein the first position and the second position of the workbench are respectively provided with a chip guide ramp and a groove penetrating to the lower space, and the chip guide is The bottom of the ramp block has a connecting block, which passes through the groove and is fixed on the corresponding displacement block, and the two pushing blocks are respectively fixed on the two chip guide ramp blocks.

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