CN216226754U - Assembling combined clamp for cylindrical gear - Google Patents

Abstract

The utility model provides an assembling combined clamp for a cylindrical gear, which mainly comprises a bottom cover, a clamping base plate, an object placing table and a clamping device, wherein the object placing table is arranged on the bottom cover; the clamping base plate is a disc and is arranged at the opening of the bottom cover; the object placing table and the clamping device are both arranged above the clamping base plate; the clamping device consists of a plurality of clamping arms; all the clamping arms are uniformly distributed around the circle center of the clamping base plate to form a clamping cavity; the object placing table is fixedly arranged in the clamping cavity. The clamping cavity has adjustable gaps, can realize rapid assembly and disassembly, and greatly improves the production efficiency; in addition, the clamping jaws with different specifications can be replaced to adapt to cylindrical gears of different models, so that the adaptability is strong; meanwhile, each accessory is simple in manufacturing process, convenient to adjust and capable of meeting production requirements.

Description

Assembling combined clamp for cylindrical gear

Technical Field

The utility model mainly relates to the technical field of combined clamps, in particular to an assembling combined clamp for a cylindrical gear.

Background

Automobile cylindrical gear is used for mechanical transmission's cylindrical gear in mainly the car, all will cooperate with the axle in the application of these gears uses to this needs carry out the processing in shaft hole to the gear, with this activity of coming the cooperation axostylus axostyle, and then need punch a hole, and cylindrical gear's forging and pressing has included forging and punching press, then need use automobile cylindrical gear to forge and press and use mounting fixture when needs punch a hole to the gear.

However, the method for clamping the cylindrical gear in the prior art has the following defects: the cylindrical gear is divided into a straight gear and a helical gear, and for the helical gear, various parameters of the helical gear with different specifications and purposes, such as tooth number, tooth pitch, helical angle and the like, are different; on the other hand, because the automobile cylindrical gear is provided with the helical gear, the outer side of the automobile cylindrical gear forms inclined teeth, when punching is separated, the punching hole is separated from the working head, so that the gear on the outer side is driven to deviate, and further the teeth at the upper end of the helical gear are in line-surface contact with the clamp; in addition, the retainer of the traditional tool clamp is not folded and unfolded together with the clamping jaws, and the clearance is small when the gear is assembled, so that automatic clamping is not facilitated.

SUMMERY OF THE UTILITY MODEL

In the prior art, various parameters of helical gears with different specifications and purposes, such as the number of teeth, the pitch, the helix angle and the like, are different, and a tool clamp adopted by a cylindrical gear in the prior art can only clamp a single certain gear, so that production cost is improved, and inconvenience is caused; in addition, the conventional method for clamping the cylindrical gear by the tool is easy to cause tooth damage, and in order to solve the technical problem, the utility model provides an assembling combined clamp for the cylindrical gear.

The technical scheme provided by the utility model is as follows:

the utility model provides an assembling combined clamp for a cylindrical gear, which comprises a bottom cover, a clamping base plate, an object placing table and a clamping device, wherein the bottom cover is provided with a clamping base plate; the clamping base plate is a disc and is arranged at the opening of the bottom cover; the object placing table and the clamping device are both arranged above the clamping base plate; the clamping device consists of a plurality of clamping arms; all the clamping arms are uniformly distributed around the circle center of the clamping base plate to form a clamping cavity; the object placing table is fixedly arranged in the clamping cavity; the clamping arm comprises a sliding rail fixedly arranged on the clamping base plate, a clamping jaw sliding along the sliding rail and a tooth groove prisoner cage arranged on the inner side of the clamping jaw; the tooth socket prisoner cage is composed of a plurality of limiting movable columns which are arranged in parallel; the limiting movable column consists of a limiting steel wire, a first ball and a second ball; the limiting steel wire is detachably arranged on the inner side of the clamping jaw; the first ball and the second ball are sleeved on the limiting steel wire, and the first ball and the second ball are arranged in a staggered mode; the bottom surface of the bottom cover is provided with a shaft hole; a pull rod nut penetrates through the shaft hole; the pull rod nut is arranged against the clamping base plate; a plurality of balance blocks are arranged between the clamping base plate and the bottom surface of the bottom cover; the balance weight is arranged right below the slide rail.

Preferably, the object placing table comprises an end face supporting seat detachably mounted on the plate surface of the clamping base plate, an end face supporting table mounted on the end face supporting seat, and an end face supporting head mounted on the end face supporting table; the clamping base plate is fixedly connected with the end face supporting seat through a first limiting bolt; the end face supporting seat is fixedly connected with the end face supporting platform through a second limiting bolt; the bottom of the end face supporting head is provided with an external thread face; the end face supporting table is provided with a screw hole matched with the external thread face; the end face supporting seat comprises a supporting part and a plurality of limiting parts; the supporting part is a circular table arranged in the clamping cavity; the limiting part is a long strip which is uniformly distributed around the circle center of the supporting part; the limiting parts are arranged between every two adjacent clamping arms; the end face supporting platform comprises a clamping part and a plurality of connecting parts; the clamping part is an inner circular ring arranged above the supporting part; the connecting part is a long strip which is uniformly distributed around the circle center of the connecting part; the connecting part is arranged right above the limiting part.

Preferably, the inner wall of the opening of the bottom cover is concave to form an annular groove; the clamping base plate is arranged in the annular groove and is fixedly arranged at an opening of the bottom cover through a third limiting bolt; the third limiting bolt penetrates through the clamping base plate and the inner wall of the bottom cover.

Preferably, the outer edge of the bottom surface of the sliding rail is provided with a retractable groove, and the retractable groove penetrates through two side walls of the sliding rail.

Preferably, a fourth limiting bolt is arranged between the bottom cover and the balance block.

Preferably, the clamping jaw is L-shaped and consists of a vertical section and a horizontal section; the transverse section slides above the sliding rail along the length direction of the transverse section, the vertical section is an arc-shaped block, and the arc length of the vertical section is greater than the width of the transverse section; the upper surface of the transverse section is provided with an arc-shaped upper cover plate, and the lower surface of the transverse section is provided with an arc-shaped lower cover plate; the upper cover plate and the lower cover plate can be detached; a plurality of first steel wire nuts are mounted on the inner side wall of the upper cover plate; a plurality of second steel wire nuts are mounted on the inner side wall of the lower cover plate; the first steel wire nut and the second steel wire nut are arranged in a one-direction pair, and the included angle between the connecting line of the first steel wire nut and the second steel wire nut and the reference horizontal plane is alpha; the value of alpha can be adjusted by changing the position of a second wire nut on the lower cover plate; the limiting steel wire penetrates through the first steel wire nut and the second steel wire nut; the vertical section determines the specific position of the whole clamping jaw on the sliding rail through a positioning bolt.

Preferably, the diameter of the first ball is larger than that of the second ball; the number of the first balls is N; the number of the second balls is N + 1.

Preferably, the material of the clamping pad is 65 Mn.

The assembling combined clamp for the cylindrical gear has the following beneficial effects:

1. in the utility model, the gap of the fixture of the clamping cavity is adjustable, so that the cylindrical gear to be processed is very simple to put in and take out, the fast assembly and disassembly can be realized, and the production efficiency is greatly improved.

2. The jack catch can realize freely receiving and opening, and the tooth of cylindrical gear can produce the friction with the jack catch during contact hardly, in addition, adds the cushioning effect of establishing first ball and second ball, can not cause the tooth impaired.

3. In the utility model, the material of the clamping base plate needs to have good elasticity, so that the clamping base plate can deform under the action of pressure on one hand, and can automatically recover the initial state under the action of no external force on the other hand, so that the clamping base plate can be used for multiple times.

4. The clamping jaws are detached from the slide rails aiming at straight gears and helical gears of different specifications and models, and the clamping jaws adapting to the specifications of the gears are replaced, so that the positions of the limiting movable columns of the clamping jaws of different models and the included angles between the limiting movable columns and the reference horizontal plane are different, and the clamping jaws adapt to cylindrical gears of different models.

5. The use of spacing post that lives has reduced the requirement to the precision, and the spur gear of first, second ball cooperatees mutually, can compensate the angular deflection between spacing post that lives and the tooth automatically.

6. The utility model relates to parts such as the clamping jaw, the clamping base plate and the like, which have simple manufacturing process and lower manufacturing cost, and the position of the clamping jaw is convenient to adjust, thereby being capable of adapting to production requirements.

Drawings

The utility model and its features, aspects and advantages will become more apparent from reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference symbols in the various drawings indicate like elements. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the utility model.

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is a plan view of the assembled cylindrical gear of the present invention;

FIG. 4 is a perspective view of the object placing table according to the present invention;

FIG. 5 is a perspective view of the inside of the bottom cover according to the present invention;

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

As used herein, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are used in the positional or orientational relationship illustrated in the figures to facilitate the description of the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the utility model.

The appearances of the terms first, second, and third, if any, are used for descriptive purposes only and are not intended to be limiting or imply relative importance.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The technical solutions in the embodiments of the present invention are described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the utility model without making creative efforts, belong to the protection scope of the utility model.

Example 1

In the prior art, various parameters of helical gears with different specifications and purposes, such as the number of teeth, the pitch, the helix angle and the like, are different, and a tool clamp adopted by a cylindrical gear in the prior art can only clamp a single certain gear, so that production cost is improved, and inconvenience is caused; in addition, the existing method for clamping the cylindrical gear by the tool is easy to cause tooth damage, and in order to solve the technical problem, the utility model provides an assembly combined clamp for the cylindrical gear, which comprises a bottom cover 1, a clamping base plate 2, an object placing table 3 and a clamping device; the clamping base plate 2 is a disc and is arranged at the opening of the bottom cover 1; the object placing table 3 and the clamping device are both arranged above the clamping base plate 2; the clamping device is composed of a plurality of clamping arms 4; all the clamping arms 4 are uniformly distributed around the circle center of the clamping base plate 2 to form a clamping cavity 5; the object placing table 3 is fixedly arranged in the clamping cavity 5; the clamping arm 4 comprises a slide rail 401 fixedly arranged on the clamping base plate 2, a clamping jaw 402 sliding along the slide rail 401 and a tooth socket prisoner cage 403 arranged on the inner side of the clamping jaw 402; the tooth socket prisoner cage 403 is composed of a plurality of limiting movable columns 6 which are arranged in parallel; the limiting plunger 6 consists of a limiting steel wire 601, a first ball 602 and a second ball 603; the limiting steel wire 601 is detachably arranged on the inner side of the clamping jaw 402; the first ball 602 and the second ball 603 are sleeved on the limiting steel wire 601, and the first ball 602 and the second ball 603 are arranged in a staggered manner; the bottom surface of the bottom cover 1 is provided with a shaft hole 7; a pull rod nut 8 is arranged in the shaft hole 7 in a penetrating way; the pull rod nut 8 is arranged against the clamping base plate 2; a plurality of balance blocks 9 are arranged between the clamping backing plate 2 and the bottom surface of the bottom cover 1; the balance weight 9 is provided directly below the slide rail 401.

When the assembling and combining clamp for the cylindrical gear related to the embodiment is used, the cylindrical gear is placed in the clamping cavity 5, the position of the clamping jaws 402 in the clamping arms 4 on the sliding rail 401 is adjusted, when the clamping jaws 402 of all the clamping arms 4 are mutually matched and the circumferential gear is clamped in the roller cage 403, the relative positions of the clamping jaws 402 on the sliding rail 401 are locked, the cylindrical gear is prevented from shifting in the horizontal direction, the pull rod nut 8 and the balance block 9 which are in contact with the bottom surface of the clamping backing plate 2 play a role in supporting in the vertical direction, the phenomenon that the clamping backing plate 2 bends and deforms downwards under the action of external pressure in the clamping process of a tool is avoided, after the processing of the cylindrical gear is finished, the bottom cover 1 is fixed, external equipment such as an air cylinder is used, an air cylinder main shaft penetrates through the shaft hole 7 and is in contact with the pull rod nut 8 in the bottom cover 1, the air cylinder main shaft pushes the pull rod nut 8, the pull rod nut 8 is upwards abutted against the clamping backing plate 2, therefore, the pressure is finally transmitted to the bottom of the clamping base plate 2 by the cylinder main shaft, the central point of the clamping base plate 2 is stressed and is bent upwards to deform, the outer edge of the clamping base plate is fixed on the bottom cover 1 and does not deform, so that the clamping base plate 2 is finally changed from a plane shape into a convex surface, therefore, the object placing table 3 fixed above the clamping base plate 2 is upwards displaced vertical to a reference horizontal line, the cylindrical gear placed above the object placing table 3 synchronously moves, and the clamping arms 4 uniformly distributed around the central point are changed from a flat position to an inclined position along with the deformation generated by the clamping base plate 2, so that the purpose of opening the clamping cavity 5 is achieved, the gap of the tool is large, the cylindrical gear to be processed is placed in and the cylindrical gear after being processed is taken out, the rapid assembly and disassembly can be realized, and the production efficiency is greatly improved; in addition, when the cylindrical gear is punched and separated from the clamping cavity 5, the friction force generated by the contact of the teeth and the clamping jaw 402 is almost 0, and the teeth are basically not damaged under the buffer action of the first ball 602 and the second ball 603; in the utility model, the material of the clamping backing plate 2 needs to have good elasticity, so that the clamping backing plate can deform under the action of pressure on one hand, and can automatically recover the initial state under the action of no external force on the other hand, so as to be used for multiple times; aiming at a straight gear and helical gears with different specifications and models, the jaw 402 is detached from the slide rail 401, and the jaw 402 adapting to the gear specification is replaced, the position of the limit plunger 6 of the jaw 402 with different models and the included angle between the limit plunger 6 and a reference horizontal plane are different, so as to adapt to cylindrical gears with different models, and the limit plunger 6 playing a role in fixing is detachably arranged at the inner side of the jaw 402, so that the aim can be realized by replacing the limit plunger 6; the use of the limiting movable column 6 reduces the requirement on precision, and the cylindrical gears of the first and second balls can automatically make up for the angular deviation between the limiting movable column 6 and the teeth; the parts such as the clamping jaws 402, the clamping base plate 2 and the like, which are provided by the utility model, have the advantages of simple manufacturing process, lower manufacturing cost and convenience in adjustment, and can meet the production requirements.

For a cylindrical gear with a smaller reference circle diameter, the claws 402 are not sufficient to fix it in the holding cavity 5, and therefore, in this embodiment, it is preferable that the object table 3 includes an end face support base 301 detachably mounted on the plate surface of the holding mat 2, an end face support base 302 mounted on the end face support base 301, and an end face support head 303 mounted on the end face support base 302; the clamping base plate 2 and the end face supporting seat 301 are fixedly connected through a first limiting bolt 10; the end face supporting seat 301 and the end face supporting seat 302 are fixedly connected through a second limiting bolt 11; the bottom of the end face support head 303 is provided with an external thread face; the end face support platform 302 is provided with a screw hole matched with the external thread face; the end face support seat 301, the end face support platform 302 and the end face support head 303 are integrally connected, so that the purpose that the whole object placing table 3 can generate vertical displacement under the action of clamping the base plate 2 is achieved, and the end face support seat 301 comprises a support part 3011 and a plurality of limiting parts 3012; the supporting part 3011 is a circular table arranged in the clamping cavity 5, and the circular table is not a circular ring, so that the end face supporting base 301 can drive the end face supporting base 302 and the end face supporting head 303 to move synchronously under the action of the clamping backing plate 2, and pressure loss is reduced; the limiting part 3012 is a long strip evenly distributed around the center of the supporting part 3011; the limiting parts 3012 are arranged between every two adjacent clamping arms 4; the end face support table 302 includes a clamping portion 3021 and a plurality of connecting portions 3022; the engaging portion 3021 is an inner ring provided above the support portion 3011, and the annular engaging portion can function to temporarily fix the cylindrical gear 12 having a small pitch circle diameter; the connecting part 3022 is a long strip evenly distributed around the center of the connecting part 3022; the connecting portion 3022 is arranged right above the limiting portion 3012, and in the process of assembling the cylindrical gear, under the driving of an external rotation acting force, the cylindrical gear is easy to shift, so that the assembling process is affected.

In this embodiment, preferably, the inner wall of the opening of the bottom cover 1 is concave to form an annular groove 13; the clamping base plate 2 is arranged in the annular groove 13 and is fixedly arranged at an opening of the bottom cover 1 through a third limiting bolt; third spacing bolt 14 runs through the inner wall setting of centre gripping backing plate 2 and bottom 1, and third spacing bolt 14 runs through centre gripping backing plate 2 and the setting of bottom 1 inner wall, can fix the outer fringe of centre gripping backing plate 2 in bottom 1 top, makes after-up assembly, and cylindrical gear 12 punches a hole the in-process, and elastic deformation can not take place for the centre gripping backing plate outer fringe, in addition, inlays centre gripping backing plate 2 in bottom 1's ring channel 13, has improved the wholeness and the aesthetic property of bottom 1 outward appearance.

In the process of punching a hole, centre gripping arm 4 produces the arc displacement, because slide rail 401 is whole to be the hard metal, and the edge of centre gripping backing plate 2 is under the effect of third spacing bolt 14, difficult deformation, consequently, in the process of producing the arc displacement, the edge of slide rail 401 offsets with the face of centre gripping backing plate 2, can produce reverse conflict effort, it produces the displacement to hinder centre gripping arm 4, therefore, preferred in this implementation, the outer fringe of slide rail 401 bottom surface is equipped with receiving and releasing groove 15, receiving and releasing groove 15 runs through the both sides wall setting of slide rail 401, when slide rail 401 outwards bulges, the buffering effect that provides that the buffer memory space that receives and releases groove 15 can be fine.

In this implementation preferably, be equipped with the fourth spacing bolt between bottom 1 and the balancing piece 9, through the fixed balancing piece 9 position in bottom 1 of fourth spacing bolt, guarantee that balancing piece 9 does not squint, play the effect of the support centre gripping arm 4 that should have, fourth spacing bolt does not contact with centre gripping backing plate 2 to cause adverse effect to the elastic deformation of centre gripping backing plate 2.

In this embodiment, the latch 402 is preferably "L" shaped and comprises a vertical section and a horizontal section; the transverse section slides above the sliding rail 401 along the length direction of the transverse section, the vertical section is an arc-shaped block, and the arc length of the vertical section is greater than the width of the transverse section; in the above embodiment, after the limiting steel wire 601 is fixed on the inner wall of the jaw 402 and the first and second balls 603 are additionally installed, the whole limiting plunger 6 is arc-shaped, and the first and second balls 603 and the inner wall of the jaw 402 are in direct contact, so that the generated friction force can not only hinder the rotation of the first and second balls 603, but also cause abrasion on the surfaces of the first and second balls 603 and the jaw after long-time use, therefore, the arc-shaped upper cover plate 16 is arranged on the upper surface of the transverse section, and the arc-shaped lower cover plate 17 is arranged on the lower surface of the transverse section; the upper cover plate 17 and the lower cover plate 17 can be detached; a plurality of first steel wire nuts 18 are arranged on the inner side wall of the upper cover plate 16; a plurality of second steel wire nuts 19 are arranged on the inner side wall of the lower cover plate 17; the first steel wire nuts 18 and the second steel wire nuts 19 are arranged in one-to-one mode, the limiting steel wire 601 can be kept in a linear state through the first and second convex steel wire nuts, meanwhile, gaps between the limiting steel wire 601 and the inner wall of the clamping jaw 402 can be enough for placing the first and second balls 603, the first and second balls 603 are guaranteed not to be in contact with the inner wall of the clamping jaw 402, loss of friction force to the limiting steel wire and the clamping jaw 402 is reduced, the limiting steel wire and the clamping jaw can freely rotate around the limiting steel wire 601 to play a role in buffering, and an included angle between a connecting line of the limiting steel wire and a reference horizontal plane is alpha; the value of alpha can be adjusted by changing the position of the second wire nut 19 on the lower cover plate 17, the specific adjustment mode is to change the model of the lower cover plate 17, the model of the lower cover plate 17 needs to be customized according to bolts with different specifications, the specific customization content is the position of the second wire nut 19, but because the device is simple, the customization cost is also lower; the limiting steel wire 601 penetrates through the first steel wire nut 18 and the second steel wire nut 19; the vertical section determines the specific position of the claw 402 on the slide rail 401 as a whole through the positioning bolt 20.

In this embodiment, it is preferable that the first ball 602 has a larger diameter than the second ball 603; the number of first balls 602 is N; the number of the second balls 603 is N +1, in this embodiment, the first balls 602 are used for mainly buffering, the first balls 602 are in direct contact with the tooth grooves of the cylindrical gear 12, and the second balls 603 are used as fittings for connecting the first balls 602 and the first balls 602, the first balls 602 and the first wire nuts 18, and the first balls 602 and the second wire nuts 19.

The clamping base plate 2 is made of a metal material with good elasticity, so that the clamping base plate can deform in the compression process and can restore the shape after being not compressed, and 65Mn, also called spring steel, is used as a preferred material for manufacturing a spring in the existing alloy material and has good flexibility and plasticity, so that the requirement on the elastic parameters of the clamping base plate 2 can be met, and therefore, the clamping base plate 2 is made of 65Mn in the embodiment.

The above-described embodiments are merely illustrative of the principles and utilities of the present patent application and are not intended to limit the present patent application. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of this patent application. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical concepts disclosed in the present application shall be covered by the claims of the present application.

Claims (8)

1. An assembling combined clamp for a cylindrical gear is characterized by comprising a bottom cover, a clamping base plate, an object placing table and a clamping device; the clamping base plate is a disc and is arranged at the opening of the bottom cover; the object placing table and the clamping device are both arranged above the clamping base plate;

the clamping device consists of a plurality of clamping arms; all the clamping arms are uniformly distributed around the circle center of the clamping base plate to form a clamping cavity; the object placing table is fixedly arranged in the clamping cavity; the clamping arm comprises a sliding rail fixedly arranged on the clamping base plate, a clamping jaw sliding along the sliding rail and a tooth groove prisoner cage arranged on the inner side of the clamping jaw; the tooth socket prisoner cage is composed of a plurality of limiting movable columns which are arranged in parallel; the limiting movable column consists of a limiting steel wire, a first ball and a second ball; the limiting steel wire is detachably arranged on the inner side of the clamping jaw; the first ball and the second ball are sleeved on the limiting steel wire, and the first ball and the second ball are arranged in a staggered mode;

the bottom surface of the bottom cover is provided with a shaft hole; a pull rod nut penetrates through the shaft hole; the pull rod nut is arranged against the clamping base plate;

a plurality of balance blocks are arranged between the clamping base plate and the bottom surface of the bottom cover; the balance weight is arranged right below the slide rail.

2. The assembling jig for a cylindrical gear according to claim 1, wherein: the object placing table comprises an end face supporting seat detachably arranged on the plate surface of the clamping base plate, an end face supporting table arranged on the end face supporting seat and an end face supporting head arranged on the end face supporting table; the clamping base plate is fixedly connected with the end face supporting seat through a first limiting bolt; the end face supporting seat is fixedly connected with the end face supporting platform through a second limiting bolt; the bottom of the end face supporting head is provided with an external thread face; the end face supporting table is provided with a screw hole matched with the external thread face;

the end face supporting seat comprises a supporting part and a plurality of limiting parts; the supporting part is a circular table arranged in the clamping cavity; the limiting part is a long strip which is uniformly distributed around the circle center of the supporting part; the limiting parts are arranged between every two adjacent clamping arms;

the end face supporting platform comprises a clamping part and a plurality of connecting parts; the clamping part is an inner circular ring arranged above the supporting part; the connecting part is a long strip which is uniformly distributed around the circle center of the connecting part; the connecting part is arranged right above the limiting part.

3. The assembling jig for a cylindrical gear according to claim 1, wherein: the inner wall of the opening of the bottom cover is concave to form an annular groove; the clamping base plate is arranged in the annular groove and is fixedly arranged at an opening of the bottom cover through a third limiting bolt;

the third limiting bolt penetrates through the clamping base plate and the inner wall of the bottom cover.

4. The assembling jig for a cylindrical gear according to claim 1, wherein: the outer edge of the bottom surface of the sliding rail is provided with a retractable groove, and the retractable groove penetrates through two side walls of the sliding rail.

5. The assembling jig for a cylindrical gear according to claim 1, wherein: and a fourth limiting bolt is arranged between the bottom cover and the balance block.

6. The assembling jig for a cylindrical gear according to claim 1, wherein: the clamping jaw is L-shaped and consists of a vertical section and a transverse section; the transverse section slides above the sliding rail along the length direction of the transverse section, the vertical section is an arc-shaped block, and the arc length of the vertical section is greater than the width of the transverse section;

the upper surface of the transverse section is provided with an arc-shaped upper cover plate, and the lower surface of the transverse section is provided with an arc-shaped lower cover plate; the upper cover plate and the lower cover plate can be detached; a plurality of first steel wire nuts are mounted on the inner side wall of the upper cover plate; a plurality of second steel wire nuts are mounted on the inner side wall of the lower cover plate; the first steel wire nuts and the second steel wire nuts are arranged oppositely one by one, and the included angle between the connecting line of the first steel wire nuts and the second steel wire nuts and the reference horizontal plane is alpha; the value of alpha can be adjusted by changing the position of a second wire nut on the lower cover plate; the limiting steel wire penetrates through the first steel wire nut and the second steel wire nut;

the vertical section determines the specific position of the whole clamping jaw on the sliding rail through a positioning bolt.

7. The assembling jig for a cylindrical gear according to claim 1, wherein: the diameter of the first ball is larger than that of the second ball; the number of the first balls is N; the number of the second balls is N + 1.

8. The assembling jig for a cylindrical gear according to claim 1, wherein: the material of the clamping backing plate is 65 Mn.

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