CN111872714A

CN111872714A - Automatic change anchor clamps for machining

Info

Publication number: CN111872714A
Application number: CN202010705573.XA
Authority: CN
Inventors: 杨大清; 康兴金; 李时军
Original assignee: Huzhou Zhongbo Intelligent Machinery Co ltd
Current assignee: DALIAN CHANGZHILIN TECHNOLOGY DEVELOPMENT CO LTD; Guiyang Changzhilin Engine Parts Manufacturing Co ltd
Priority date: 2020-07-21
Filing date: 2020-07-21
Publication date: 2020-11-03
Anticipated expiration: 2040-07-21
Also published as: CN111872714B

Abstract

The invention discloses a clamp for automatic machining, relates to the technical field of clamps, and solves the problem that an existing clamp cannot clamp and position a workpiece and the center of the clamp. A clamp for automatic machining comprises a clamping block and an adjusting rod; the clamping block is fixedly connected to the top of one end of the synchronous rod; the adjusting rod is inserted in the shell. The device can drive the synchronous rod to move synchronously through the driven gear when clamping a workpiece, so that the circular workpiece is fixed at the center of the clamp, the workpiece can automatically position the center of the circular workpiece at the center of the clamp under the action of the four synchronous rods, subsequent adjustment is not needed, the inside and the outside of the clamping block are different, the circular workpiece can be clamped and fixed through the inner support or the outer clamp freely, the adaptability is high, and the flexibility of the device is improved.

Description

Automatic change anchor clamps for machining

Technical Field

The invention belongs to the technical field of clamps, and particularly relates to a clamp for automatic machining.

Background

The jig is a device for fixing a processing object to occupy a correct position for receiving construction or inspection in a machine manufacturing process, and is also called a jig. In a broad sense, any process in the process, a device for quickly, conveniently and safely installing a workpiece, which may be called a fixture, is required to be installed and clamped before machining in order to make the surface of the workpiece meet the technical requirements of the size, the geometric shape, the mutual position precision with other surfaces and the like specified in the drawing when the workpiece is machined in a mechanical automation manner.

If the application number is: CN201711140277.4 discloses an adjustable mechanical fixture capable of accurately positioning, which comprises a bottom plate, wherein fixed blocks are fixedly connected to both sides of the top end of the bottom plate, a supporting slide bar is fixedly connected to one side of the fixed block close to the bottom end, one side of the fixed block is positioned above the supporting slide bar and penetrates through the supporting slide bar and is rotatably connected to a rotating lead screw, a sliding platform is sleeved on the supporting slide bar, an inner thread groove is in threaded connection with the rotating lead screw, a left moving clamping device is fixedly connected to the top end of the sliding platform, a driven rotating shaft is rotatably connected to the top end of the bottom plate and the position on the right side of the fixed block, and a right fixing clamping device is fixedly connected to the top end of the driven rotating shaft. This mechanical fixture with adjustable can accurate positioning has reached preliminary adjustable angle's fixed part, has improved the nimble of anchor clamps, the operation of being convenient for, and diversified safe is fixed, the purpose that prevention machine part drops.

The existing mechanical automatic clamp can only drive a single clamping block to move towards the clamping block fixed in the opposite position through the screw rod when in use, so that the clamping of a workpiece is realized, for example, a bench clamp has the advantages of simple structure and convenience in operation, but when the clamping mode is used for clamping a circular workpiece, the clamp cannot clamp and position the workpiece and the clamp with the center of the workpiece, the position of the clamp is required to be adjusted to determine the machining center of the workpiece after clamping at each time, and the clamp is more troublesome and has low practicability.

In view of the above, the present invention provides a clamp for automatic machining, which is improved in view of the conventional structure and defects, and is expected to achieve the purpose of higher practical value.

Disclosure of Invention

In order to solve the technical problems, the invention provides a clamp for automatic machining, which aims to solve the problems that when the existing mechanical automatic clamp is used, a screw rod drives only a single clamping block to move towards a clamping block fixed in an opposite position so as to clamp a workpiece, such as bench clamp, although the clamp has the advantages of simple structure and convenience in operation, when the circular workpiece is clamped by the clamping mode, the clamp cannot clamp and position the workpiece and the center of the clamp, so that the position of the clamp needs to be adjusted to determine the machining center of the workpiece after each clamping, and the clamp is troublesome and not high in practicability.

The purpose and the effect of the clamp for automatic machining are achieved by the following specific technical means:

a clamp for automatic machining comprises a shell, a clamping block, an adjusting rod and a clamping rod; a synchronous rod is inserted in the shell; the clamping block is fixedly connected to the top of one end of the synchronous rod; the adjusting rod is inserted in the shell; the clamping rod is movably connected inside the mounting block on the side surface of the shell.

Further, the middle rod body of the clamping rod is designed as a worm, a composite gear is arranged inside the installation block, the bottom of the composite gear is designed as a worm wheel, the composite gear is rotatably connected inside the installation block, and the worm wheel at the bottom of the composite gear is in transmission connection with the worm of the clamping rod.

Further, the inside of shell is equipped with driven gear, and driven gear's side is equipped with the teeth of a cogwheel, the teeth of a cogwheel height of driven gear side is the half of driven gear height, and the teeth of a cogwheel of driven gear side is located the bottom of driven gear side, composite gear's top is equipped with the driving gear, and the teeth of a cogwheel interlock of driving gear and driven gear.

Further, the inside of shell is equipped with synchronous ratch, and synchronous ratch rotates the inside of connecting at the shell, synchronous ratch is equipped with four, and the wheel body of synchronous ratch is equipped with the last cingulum and the cingulum down of mutual disconnection, go up the cingulum and design the wheel body in synchronous ratch top and bottom respectively with the cingulum down.

Furthermore, the height of a lower toothed belt of the synchronous toothed bar is the same as that of the gear teeth on the side face of the driven gear, the gear teeth of the lower toothed belt are meshed with the gear teeth of the driven gear, and the distance between the upper toothed belt and the lower toothed belt is larger than that of the gear teeth on the side face of the driven gear.

Further, the synchronizing bar is provided with four, the side face of the bar body of the synchronizing bar is provided with gear teeth, the height of the upper toothed belt of the synchronizing toothed bar is equal to that of the synchronizing bar, the gear teeth of the bar body of the synchronizing bar are meshed with the gear teeth of the upper toothed belt of the synchronizing toothed bar, the outer side of each clamping block is in a circular arc shape, and the inner part of each clamping block is in a linear design.

Furthermore, the inside of synchronous ratch is equipped with the spring groove, and the spring inslot is equipped with the top spring, the control flume has been seted up to the position that the shell is located synchronous ratch bottom, and the height of control flume is greater than the height of synchronous ratch, the both ends of top spring fixed connection respectively are at the interior top in synchronous ratch spring groove and the bottom in control flume.

Furthermore, the shape of adjusting the pole is "L" shape, and the top and the bottom of adjusting the pole are equipped with fender ring and blend stop respectively, the top of synchronous ratch is equipped with the blend stop groove, and adjusts the pole and rotate the inside of connecting at synchronous ratch, the blend stop is pegged graft in the spacing inslot of shell bottom bar, and the height that highly is greater than the driven gear side teeth of a cogwheel of blend stop.

Compared with the prior art, the invention has the following beneficial effects:

the device can drive the synchronous rod to move synchronously through the driven gear when clamping a workpiece, so that the circular workpiece is fixed at the center of the clamp, the workpiece can automatically position the center of the circular workpiece at the center of the clamp under the action of the four synchronous rods, subsequent adjustment is not needed, the inside and the outside of the clamping block are different, the circular workpiece can be clamped and fixed through the inner support or the outer clamp freely, the adaptability is high, and the flexibility of the device is improved.

Firstly, the worm in the middle of the clamping rod drives the compound gear to transmit, the worm gear has the characteristic of one-way transmission, the design ensures that after the device clamps and fixes a workpiece, the reaction force of clamping cannot drive the worm to rotate, so that the clamped workpiece can be stably clamped and fixed, the phenomenon that the workpiece loosens and falls to cause processing failure in the subsequent processing process is avoided, and the stability of the device is improved.

Secondly, synchronous ratch can pass through last cingulum and lower cingulum and transmit driven gear's rotation for the synchronizing lever, make synchronizing lever simultaneous movement carry out the centre gripping fixed to the work piece, if do not need certain synchronizing lever motion to participate in when fixed to press the regulation pole, the fender ring drives synchronous ratch and moves down, the teeth of a cogwheel of driven gear this moment is located between synchronous ratch's last cingulum and the lower cingulum, make synchronous ratch's lower cingulum lose with the interlock relation of driven gear teeth, this synchronizing lever loses behind the transmission not fixed in the centre gripping of participating in to the work piece, high durability and convenient operation, it is nimble to use, can adapt to the centre gripping of other kind of work pieces under the different situation fixed, the diversity and the adaptability of the device have been improved.

Moreover, the adjusting rod is designed to be L-shaped, so that when the adjusting rod moves downwards, the barrier strip can penetrate through the limiting groove in the bottom of the shell, the barrier strip can be clamped at the bottom of the shell after the adjusting rod is rotated, the position of the synchronous toothed bar is locked, the synchronous toothed bar is not in transmission with the driven gear, the synchronous toothed bar cannot participate in clamping and fixing of a workpiece, and the flexibility of the device is improved.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic view of the internal structure of the present invention.

Fig. 3 is a schematic structural view of the present invention taken apart from fig. 2.

Fig. 4 is a schematic disassembled structure of the present invention.

Fig. 5 is a schematic view of the structure at the bottom of fig. 3 according to the present invention.

Fig. 6 is an enlarged schematic view of the portion a of fig. 2 according to the present invention.

Fig. 7 is an enlarged schematic view of the portion B of fig. 3 according to the present invention.

Fig. 8 is an enlarged view of the portion C of fig. 4 according to the present invention.

In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:

1. a housing; 2. a clamping block; 3. a synchronization lever; 4. adjusting a rod; 5. a clamping lever; 101. mounting blocks; 102. a compound gear; 103. a driven gear; 104. a synchronous rack bar; 105. a control slot; 106. a limiting groove; 401. a baffle ring; 402. blocking strips; 1021. a worm gear; 1022. a driving gear; 1041. an upper toothed belt; 1042. a lower toothed belt; 1043. a spring is supported; 1044. and (6) blocking the groove.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

as shown in figures 1 to 8:

the invention provides a clamp for automatic machining, which comprises a shell 1, a clamping block 2, an adjusting rod 4 and a clamping rod 5, wherein the clamping block is fixedly connected with the shell; a synchronous rod 3 is inserted in the shell 1; the driven gear 103 is arranged in the housing 1, gear teeth are arranged on the side surface of the driven gear 103, the height of the gear teeth on the side surface of the driven gear 103 is half of the height of the driven gear 103, the gear teeth on the side surface of the driven gear 103 are positioned at the bottom of the side surface of the driven gear 103, a driving gear 1022 is arranged at the top of the compound gear 102, and the gear teeth of the driving gear 1022 are meshed with the gear teeth of the driven gear 103, as shown in fig. 2, fig. 4, fig. 6 and fig. 8, the compound gear 102 can drive the driven gear 103 to rotate through the driving gear 1022, so that the subsequent work piece; the height of the lower toothed belt 1042 of the synchronizing toothed bar 104 in the housing 1 is the same as the height of the side teeth of the driven gear 103, the teeth of the lower toothed belt 1042 are meshed with the teeth of the driven gear 103, and the distance between the upper toothed belt 1041 and the lower toothed belt 1042 is greater than the height of the side teeth of the driven gear 103, as shown in fig. 2, 4, 6 and 8, by the design, after the synchronizing toothed bar 104 moves downwards, a sufficient gap is left between the upper toothed belt 1041 and the lower toothed belt 1042 to release the transmission relationship between the driven gear 103 and the lower toothed belt 1042 of the synchronizing toothed bar 104, so that the purpose of determining whether a certain synchronizing bar 3 participates in clamping and fixing operation on a workpiece is achieved, and the stability of the device is improved; a spring groove is formed in the synchronous rack bar 104, a top spring 1043 is arranged in the spring groove, a control groove 105 is formed in the position, located at the bottom of the synchronous rack bar 104, of the housing 1, the height of the control groove 105 is larger than that of the synchronous rack bar 104, two ends of the top spring 1043 are fixedly connected to the inner top of the spring groove of the synchronous rack bar 104 and the bottom of the control groove 105 respectively, as shown in fig. 2, fig. 3, fig. 6 and fig. 7, so that when the device is in a reset state, the synchronous rack bar 104 can be under the action of the top spring 1043, an upper toothed belt 1041 and a lower toothed belt 1042 of the synchronous rack bar 104 can be tightly meshed with the teeth of the driven gear 103 and the synchronous rack bar 3 respectively, transmission is achieved, the phenomenon that the clamping and fixing functions of the device fail due to the fact that the synchronous rack bar 104 cannot be transmitted with the driven gear 103 and the synchronous rack bar 3; the clamping block 2 is fixedly connected to the top of one end of the synchronous rod 3; the adjusting rod 4 is inserted in the shell 1; the clamping rod 5 is movably connected inside a mounting block 101 at the side of the shell 1.

The middle rod body of the clamping rod 5 is designed as a worm, the composite gear 102 is arranged inside the mounting block 101, the bottom of the composite gear 102 is designed as a worm wheel 1021, the composite gear 102 is rotatably connected inside the mounting block 101, and the worm wheel 1021 at the bottom of the composite gear 102 is in transmission connection with the worm of the clamping rod 5, as shown in fig. 2 and fig. 6, the worm wheel 1021 and the worm of the clamping rod 5 have the characteristic of one-way transmission, so that after the device fastens and fixes a workpiece, the clamping reaction force cannot drive the clamping rod 5 to rotate, the clamped workpiece can be stably clamped and fixed, the phenomenon that the workpiece loosens and falls to cause processing failure in the subsequent processing process is avoided, and the stability of the device is improved.

Wherein, the inside of the shell 1 is provided with four synchronous rack bars 104, the synchronous rack bars 104 are rotatably connected with the inside of the shell 1, and the wheel body of the synchronizing rack bar 104 is provided with an upper toothed belt 1041 and a lower toothed belt 1042 which are disconnected with each other, the upper toothed belt 1041 and the lower toothed belt 1042 are respectively designed on the wheel body of the top and the bottom of the synchronizing rack bar 104, as shown in fig. 3, 4 and 8, the design is that after the synchronous gear lever 104 realizes the power transmission of the driven gear 103 and the synchronous lever 3, when the synchronizing rack 104 is pressed down, the synchronizing rack 104 can be released from the transmission relationship between the synchronizing rack 104 and the driven gear 103 through the vacant part between the upper rack 1041 and the lower rack 1042, therefore, whether a certain synchronous rod 3 participates in the clamping and fixing operation of the workpiece or not can be determined, the clamping and fixing of other different workpieces can be flexibly met, and the flexibility and the adaptability of the device are improved.

Wherein, the number of the synchronous rods 3 is four, the side surface of the synchronous rod 3 is provided with gear teeth, the height of the upper gear band 1041 of the synchronous rack bar 104 is the same as that of the synchronous rod 3, the gear teeth of the rod body of the synchronous rod 3 are mutually meshed and connected with the gear teeth of the upper gear band 1041 of the synchronous rack bar 104, the outer side of the clamping block 2 is designed to be circular arc, and the inner part of the clamping block 2 is designed to be linear, as shown in the attached figures 3 and 4, the design enables the synchronous rod 3 to synchronously move under the driving of the driven gear 103, thereby fixing the circular workpiece at the center of the clamp without subsequent adjustment, and the work piece can be with the central point of the work piece of ring shape put automatic positioning at the center of anchor clamps under the effect of four synchronizing bars 3, and the inside and the outside shape of clamp splice 2 are different, can freely select to press from both sides tightly fixedly through interior support or outer clamp to ring class work piece, and the adaptability is high, has improved the flexibility and the practicality of the device.

The shape of the adjusting rod 4 is "L" shape, the top and the bottom of the adjusting rod 4 are respectively provided with a baffle ring 401 and a baffle strip 402, the top of the synchronous rack 104 is provided with a baffle groove 1044, the adjusting rod 4 is rotatably connected inside the synchronous rack 104, the baffle strip 402 is inserted into the strip-shaped limiting groove 106 at the bottom of the housing 1, and the height of the baffle strip 402 is greater than the height of the side gear teeth of the driven gear 103, as shown in fig. 2, fig. 4, fig. 6 and fig. 8, the design enables the adjusting rod 4 to move downwards, the baffle strip 402 can pass through the limiting groove 106 at the bottom of the housing 1, the baffle strip 402 can be clamped at the bottom of the housing 1 after the adjusting rod 4 is rotated, thereby locking the position of the synchronous rack 104, enabling the synchronous rack 104 not to be in transmission with the driven gear 103, and enabling the synchronous rod 3 not to participate in clamping and fixing of workpieces, and improving.

The specific use mode and function of the embodiment are as follows:

in the invention, when the device clamps and fixes a circular workpiece, the inner shape and the outer shape of the clamping block 2 are different, the circular workpiece can be clamped and fixed through inner support or outer clamping freely, the circular workpiece can be clamped and fixed through inner support or outer clamping selectively as required, the clamping rod 5 is rotated, the compound gear 102 is driven to rotate by the worm of the clamping rod 5 through the bottom worm wheel 1021, the driving gear 1022 at the top of the compound gear 102 drives the driven gear 103 to rotate, the synchronous rod 3 can be driven by the driven gear 103 to synchronously move under the action of the upper toothed belt 1041 and the lower toothed belt 1042 of the synchronous toothed rod 104, so that the circular workpiece is fixed at the center of the clamp without subsequent adjustment, the center position of the circular workpiece can be automatically positioned at the center of the clamp under the action of the four synchronous rods 3, the adaptability is high, the worm wheel 1021 and the worm of the clamping rod 5 have the characteristic of one-way transmission, so that after the device clamps and fixes a workpiece, the clamping reaction force cannot drive the clamping rod 5 to rotate, the clamped workpiece can be stably clamped and fixed, the phenomenon of processing failure caused by loosening and falling of the workpiece in the subsequent processing process is avoided, when other kinds of workpieces are required to be fixed, the corresponding synchronous rod 3 can be selected to clamp and fix the workpiece in the above mode according to the requirement, wherein the synchronous rod 3 which is not required to be used can be pressed down and rotate the adjusting rod 4 to avoid the clamping and fixing process, after the synchronous rod 104 moves down, the baffle ring 401 drives the synchronous rod 104 to move down, a sufficient gap is formed between the upper toothed belt 1041 and the lower toothed belt 1042 of the synchronous rod 104 to remove the transmission relationship between the driven gear 103 and the lower toothed belt 1042 of the synchronous rod 104, and the purpose of determining whether a certain synchronous rod 3 participates in the clamping and fixing operation of the workpiece is achieved, and when the adjusting rod 4 moves downwards, the barrier 402 can pass through the limiting groove 106 at the bottom of the housing 1, the barrier 402 can be clamped at the bottom of the housing 1 after the adjusting rod 4 is rotated, so as to lock the position of the synchronizing rack 104, so that the synchronizing rack 104 is not in transmission with the driven gear 103, so that the synchronizing rack 3 does not participate in clamping and fixing of the workpiece, the synchronizing rack 104 is internally provided with a top spring 1043, when the transmission relationship between the synchronizing rack 104 and the driven gear 103 is restored, only the adjusting rod 4 needs to be rotated, so that after the barrier 402 is overlapped with the limiting groove 106, the synchronizing rack 104 can automatically reset under the action of the top spring 1043, the clamping relationship between the synchronizing rack 104 and the teeth of the driven gear 103 and the synchronizing rack 3 is restored, so that when the device is in a reset state, the synchronizing rack 104 can be under the action of the top spring 1043, the upper toothed belt 1041 and the lower toothed belt 1042 of the synchronizing rack 104 can be tightly engaged with the teeth of the driven gear 103 and the synchronizing rack 3 respectively, the transmission is realized, and the phenomenon that the clamping and fixing functions of the device are invalid due to the fact that the synchronous gear rod 104 cannot be transmitted with the driven gear 103 and the synchronous rod 3 can not occur.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. The utility model provides an automatic change anchor clamps for machining which characterized in that: comprises a shell (1), a clamping block (2), an adjusting rod (4) and a clamping rod (5); a synchronous rod (3) is inserted into the shell (1); the clamping block (2) is fixedly connected to the top of one end of the synchronizing rod (3); the adjusting rod (4) is inserted in the shell (1); the clamping rod (5) is movably connected inside the mounting block (101) on the side surface of the shell (1).

2. The automated machining jig according to claim 1, characterized in that: the middle rod body of pressing from both sides tight pole (5) is the worm design, the inside of installation piece (101) is equipped with composite gear (102), and the bottom of composite gear (102) is worm wheel (1021) design, composite gear (102) rotate to be connected in the inside of installation piece (101), and worm wheel (1021) and the worm transmission of pressing from both sides tight pole (5) of composite gear (102) bottom are connected.

3. The automated machining jig according to claim 1, characterized in that: the inside of shell (1) is equipped with driven gear (103), and the side of driven gear (103) is equipped with the teeth of a cogwheel, the teeth of a cogwheel height of driven gear (103) side is half of driven gear (103) height, and the teeth of a cogwheel of driven gear (103) side is located the bottom of driven gear (103) side, the top of composite gear (102) is equipped with driving gear (1022), and the teeth of a cogwheel interlock of driving gear (1022) and driven gear (103).

4. The automated machining jig according to claim 1, characterized in that: the inside of shell (1) is equipped with synchronous ratch (104), and synchronous ratch (104) rotate to be connected in the inside of shell (1), synchronous ratch (104) are equipped with four, and the wheel body of synchronous ratch (104) is equipped with upper tooth area (1041) and lower tooth area (1042) of mutual disconnection, upper tooth area (1041) and lower tooth area (1042) design respectively in the wheel body of synchronous ratch (104) top and bottom.

5. The automated machining jig according to claim 4, characterized in that: the height of a lower toothed belt (1042) of the synchronous toothed bar (104) is the same as that of the side teeth of the driven gear (103), the teeth of the lower toothed belt (1042) are meshed with the teeth of the driven gear (103), and the distance between the upper toothed belt (1041) and the lower toothed belt (1042) is larger than the height of the side teeth of the driven gear (103).

6. The automated machining jig according to claim 1, characterized in that: the utility model discloses a synchronous pole, including synchronizing bar (3), synchronizing bar (3) are equipped with four, the body of rod side of synchronizing bar (3) is equipped with the teeth of a cogwheel, and the height of going up cingulum (1041) of synchronous ratch (104) is the same with the height of synchronizing bar (3), the teeth of a cogwheel of the body of synchronizing bar (3) and the teeth of a cogwheel interlock of going up cingulum (1041) of synchronous ratch (104) are connected, the outside of clamp splice (2) is convex design, and the inside of clamp splice (2) is the linear type design.

7. The automated machining jig according to claim 4, characterized in that: the inside of synchronous ratch (104) is equipped with the spring groove, and is equipped with top spring (1043) in the spring groove, control groove (105) have been seted up to the position that shell (1) is located synchronous ratch (104) bottom, and the height that highly is greater than synchronous ratch (104) of control groove (105), the both ends difference fixed connection of top spring (1043) is in the bottom of the interior top in synchronous ratch (104) spring groove and control groove (105).

8. The automated machining jig according to claim 1, characterized in that: the adjusting rod (4) is L-shaped, the top and the bottom of the adjusting rod (4) are respectively provided with a baffle ring (401) and a baffle strip (402), the top of the synchronous rack bar (104) is provided with a baffle groove (1044), the adjusting rod (4) is rotatably connected inside the synchronous rack bar (104), the baffle strip (402) is inserted into a strip-shaped limiting groove (106) at the bottom of the shell (1), and the height of the baffle strip (402) is greater than that of the side gear teeth of the driven gear (103).