CN112643580A

CN112643580A - Multi-angle positioning fixture is used in processing of three ball round pins

Info

Publication number: CN112643580A
Application number: CN202011527422.6A
Authority: CN
Inventors: 余银炜
Original assignee: Zhuji Jingbo Machinery Co ltd
Current assignee: Zhejiang Dasheng Electronic Development Co ltd
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-04-13
Anticipated expiration: 2040-12-22
Also published as: CN112643580B

Abstract

The invention discloses a multi-angle positioning fixture for machining a three-ball pin, which comprises a bottom plate, wherein supporting legs are fixedly arranged at four corners of the lower end of the bottom plate, an installation plate is fixedly arranged in the middle of the upper end of the bottom plate, a first clamping plate is fixedly arranged at the upper end of the installation plate, an adjusting assembly is fixedly arranged at the rear part of the upper end of the installation plate, a second clamping plate is arranged at the upper end of the adjusting assembly, and a semi-annular groove is formed in the middle of; the terminal surface that first splint and second splint kept away from each other is the arcwall face, and a plurality of sand grips of the equal equidistance fixedly connected with of one end and the backup pad that first splint and second splint kept away from each other, two stable assemblies of common fixedly connected with between first splint and the second splint. According to the multi-angle positioning fixture for machining the three-ball pin, more space is reserved by fixing and supporting the inner side of the inner shaft sleeve of the three-ball pin, subsequent machining operation can be facilitated, the whole fixture is simple and rapid in fixing operation, and the fixing effect is good.

Description

Multi-angle positioning fixture is used in processing of three ball round pins

Technical Field

The invention relates to the field of auxiliary equipment for machining a three-ball pin, in particular to a multi-angle positioning clamp for machining the three-ball pin.

Background

The tripod is mainly used for the inner ball cage of a four-wheel drive vehicle, is suitable for the position of the inner ball cage with small torsion angle, and has compact structure, the tripod universal joint consists of an outer sleeve, a tripod ball ring and a roller pin, the roller pin determines the bearing torque of the universal joint, the maximum contact stress appears on the contact point of the roller pin and a three-column shaft, and the tripod has the advantages of larger axial slippage and smaller sliding resistance, strong transmission capability, fast heat dissipation, simple processing technology, simple installation, reliable work and the like, and can overcome the problem of unequal speed of the common cross shaft type universal joint. The tripod is fixed through frock clamp in the course of the processing preparation, and this just needs to use mounting fixture.

In the prior art, most of the three-ball pin fixing clamps can only fix the inner shaft sleeve of one three-ball pin independently, and in the actual fixing operation process, the fixing operation is more complicated, the fixing effect is poor, and further the working efficiency is influenced, in addition, the angle of the fixing device needs to be adjusted under some conditions during processing, for example, when the processing condition is checked, the three-ball pin needs to be taken out for observation, or the three-ball pin needs to be observed by rotating different angles, most of the three-ball pin fixing clamps in the prior art do not have the capability of angle adjustment change, the design is unreasonable, the use is inconvenient, the working efficiency is low, and most of the three-ball pin fixing clamps in the prior art are fixed from the outer surface of the three-ball pin, the occupied space is large, certain adverse effect is brought to the subsequent processing operation, and the operation difficulty is increased.

In view of the above, the present inventors have proposed a multi-angle positioning jig for machining a tripod.

Disclosure of Invention

The invention mainly aims to provide a multi-angle positioning fixture for machining a three-ball pin, which can effectively solve the problems in the background technology.

In order to achieve the purpose, the invention adopts the technical scheme that:

the multi-angle positioning fixture for machining the tripod comprises a bottom plate, wherein supporting legs are fixedly arranged at four corners of the lower end of the bottom plate, a mounting plate is fixedly arranged in the middle of the upper end of the bottom plate, a first clamping plate is fixedly arranged at the front part of the upper end of the mounting plate, an adjusting assembly is fixedly arranged at the rear part of the upper end of the mounting plate, a second clamping plate is arranged at the upper end of the adjusting assembly, and a semicircular groove is formed in the middle of the upper end of;

the terminal surface that first splint and second splint kept away from each other is the arcwall face, and a plurality of sand grips of the equal equidistance fixedly connected with of one end and the backup pad that first splint and second splint kept away from each other, two stable assemblies of common fixedly connected with between first splint and the second splint.

As a further scheme of the invention, a shaft lever is fixedly arranged at the front part of the upper end of the bottom plate, a limiting block is fixedly arranged at the upper end of the shaft lever, the limiting block is positioned at the circle center of the semi-annular groove, and the shaft lever is connected in a threaded manner.

As a further scheme of the invention, the mounting plate is of a cuboid structure, a convex plate is fixedly mounted at the front end of the mounting plate, the convex plate and the mounting plate are of an integrally formed structure, a through hole penetrating up and down is formed in the middle of the upper end of the convex plate, and a fastening mechanism is arranged at the rear part of the lower end of the mounting plate.

As a further scheme of the invention, the diameter of the cross section of the shaft lever is not larger than that of the cross section of the through hole, the shaft lever is rotatably connected in the through hole, the limiting block is positioned above the convex plate, and the lower end face of the limiting block is tightly attached to the upper end face of the convex plate.

As a further scheme of the invention, the adjusting assembly comprises a fixed seat, a sliding groove is formed in the middle of the upper end of the fixed seat, a vertical plate perpendicular to the sliding groove is fixedly installed at the front portion of the upper end of the fixed seat, a sliding block is connected in the sliding groove in a sliding mode, a sliding plate is fixedly installed at the upper end of the sliding block, the lower end face of the sliding plate is tightly attached to the upper end face of the fixed seat, the second clamping plate is fixedly installed in the middle of the upper end of the sliding plate and is of an integrally formed structure with the sliding plate, a stabilizing plate is fixedly installed at the rear portion of the upper end of the fixed seat, a screw rod is rotatably connected to the middle of the rear end of the sliding plate, the rear end of the screw rod penetrates through the stabilizing plate and extends to the rear of the stabilizing plate, a.

As a further scheme of the invention, the stabilizing assembly comprises a fixing block fixedly arranged at the rear end of the first clamping plate and a connecting plate fixedly arranged at the front end of the second clamping plate, a rectangular groove is formed in one end, close to the connecting plate, of the fixing block, a buffer spring is fixedly arranged on the side wall of the rectangular groove, a bearing plate is fixedly connected to one end, close to the fixing block, of the connecting plate, and one end, close to the fixing block, of the bearing plate extends into the rectangular groove and is fixedly connected with the buffer spring.

According to a further scheme of the invention, the fastening mechanism comprises a vertical rod fixedly mounted at the rear part of the lower end of the mounting plate and a threaded sleeve in threaded connection with the lower part of the outer surface of the vertical rod, the lower end of the vertical rod penetrates through the semi-annular groove and extends to the lower part of the bottom plate, the lower end of the threaded sleeve is fixedly connected with a ball valve, the ball valve and the threaded sleeve are in an integrated structure, the ball valve and the middle part of the upper end of the threaded sleeve are jointly provided with a mounting groove, the vertical rod is in threaded connection in the mounting groove, and the middle part.

As a further scheme of the invention, the buffer rubber gasket is positioned between the bottom plate and the threaded sleeve, and the size of the buffer rubber gasket is larger than that of the semi-annular groove.

As a further scheme of the invention, the raised lines are preferably made of nitrile rubber and are adhered to one end face, away from each other, of the first clamping plate and the second clamping plate through strong adhesives, the raised lines on the first clamping plate and the second clamping plate form two supporting areas at different heights, and the supporting plates are respectively positioned under each supporting area.

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

1. through being provided with adjusting part, when need fixing the tripod head, rotate the carousel earlier, make the carousel drive the screw rod and rotate, thereby can make screw rod and carousel and the vertical board of slide syntropy be close to, make the second splint be close to first splint, the slider slides in the spout this moment, play certain spacing effect to the slider, it carries out the displacement to assist it, enough hours between second splint and the first splint, the interior axle sleeve of tripod head that will wait to carry out the processing operation is placed in first splint and second splint outside, the contra-rotation carousel, even make the slide keep away from vertical board, and then make first splint keep away from each other with the second splint, until pressing from both sides the interior axle sleeve of tripod head tightly, the interior axle sleeve of tripod head is located the backup pad up end this moment, accomplish fixed work promptly, whole easy operation is convenient, high work efficiency.

2. According to the invention, the limiting block, the through hole and the shaft rod are matched, so that the whole mounting plate can rotate by taking the shaft rod as an axis, and at the moment, the vertical rod slides in the semi-annular groove, so that the processing conditions of the three-ball pin can be conveniently observed at different angles, and the actual use experience of the three-ball pin is better.

3. According to the invention, more space is reserved by fixedly supporting the inner side of the inner shaft sleeve of the three-ball pin, so that the subsequent processing operation can be facilitated, and the use experience of the whole clamp is further improved.

Drawings

FIG. 1 is a schematic view of an overall structure of a multi-angle positioning fixture for machining a tripod according to the present invention;

FIG. 2 is a schematic overall structure diagram of a first clamping plate and a second clamping plate of the multi-angle positioning fixture for machining the tripod according to the present invention;

FIG. 3 is a schematic view of the overall structure of a base plate of the multi-angle positioning fixture for machining a tripod according to the present invention;

FIG. 4 is a schematic view of the overall structure of the mounting plate of the multi-angle positioning fixture for machining the tripod head according to the present invention:

FIG. 5 is a schematic view of an overall structure of an adjusting mechanism of a multi-angle positioning fixture for machining a tripod according to the present invention;

FIG. 6 is a cross-sectional view of a stabilizing assembly of the multi-angle positioning fixture for tripod machining according to the present invention;

FIG. 7 is a cross-sectional view of a fastening mechanism of a multi-angle positioning fixture for machining a tripod according to the present invention.

In the figure: 1. a base plate; 2. supporting legs; 3. mounting a plate; 31. a fastening mechanism; 311. a ball valve; 312. a threaded sleeve; 313. a cushion rubber washer; 314. a vertical rod; 315. mounting grooves; 32. a convex plate; 33. a through hole; 4. a first splint; 5. a second splint; 6. an adjustment assembly; 61. a fixed seat; 62. a vertical plate; 63. a chute; 64. a slide plate; 65. a slider; 66. a screw; 67. a stabilizing plate; 68. a coil spring; 69. a turntable; 7. a semi-annular groove; 8. a shaft lever; 9. a limiting block; 10. a convex strip; 11. a support plate; 12. a stabilizing assembly; 121. a fixed block; 122. a rectangular groove; 123. a buffer spring; 124. a carrier plate; 125. a connecting plate.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" 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 "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which 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.

As shown in fig. 1-7, a multi-angle positioning fixture for machining a three-ball pin comprises a bottom plate 1, wherein four corners of the lower end of the bottom plate 1 are fixedly provided with supporting legs 2, the middle part of the upper end of the bottom plate 1 is fixedly provided with an installation plate 3, the front part of the upper end of the installation plate 3 is fixedly provided with a first clamping plate 4, the rear part of the upper end of the installation plate 3 is fixedly provided with an adjustment assembly 6, the upper end of the adjustment assembly 6 is provided with a second clamping plate 5, and the middle part of the upper end;

referring to fig. 2, an end face of the first clamping plate 4 and the end face of the second clamping plate 5, which are far away from each other, are both arc-shaped faces, a plurality of protruding strips 10 and a supporting plate 11 are fixedly connected to the end of the first clamping plate 4 and the end of the second clamping plate 5, which are far away from each other, at equal intervals, and two stabilizing assemblies 12 are fixedly connected between the first clamping plate 4 and the second clamping plate 5.

Wherein, the preferred butadiene-acrylonitrile rubber of sand grip 10 preparation material, it bonds in the terminal surface that first splint 4 and second splint 5 kept away from each other through powerful adhesive, and a plurality of sand grips 10 on first splint 4 and the second splint 5 all form two support areas at the co-altitude not, and backup pad 11 is located under every support area respectively.

The nitrile rubber is prepared from butadiene and acrylonitrile by an emulsion polymerization method, is mainly produced by a low-temperature emulsion polymerization method, has excellent oil resistance, higher wear resistance, better heat resistance and strong bonding force, has a certain elastic effect, can well protect the tripod when actually fixed, and has low loss and long service life in the use process because the wear resistance of the nitrile rubber is good.

Two support areas that constitute by a plurality of sand grip 10 can be fixed more than one simultaneously and wait to carry out the tripod of processing, help improving work efficiency to after fixed finishing, utilize the backup pad 11 that is located the support area below, can play certain supporting role in vertical direction to the tripod, keep its fixed fastness.

Referring to fig. 3-4, in the present invention, a shaft lever 8 is fixedly installed at the front portion of the upper end of the bottom plate 1, a limit block 9 is fixedly installed at the upper end of the shaft lever 8, the limit block 9 is located at the center of the semi-annular groove 7, and the connection mode of the shaft lever 8 is a threaded connection; the mounting plate 3 is of a cuboid structure, a convex plate 32 is fixedly mounted at the front end of the mounting plate 3, the convex plate 32 and the mounting plate 3 are of an integrally formed structure, a through hole 33 which penetrates through the upper end and the lower end is formed in the middle of the upper end of the convex plate 32, and a fastening mechanism 31 is arranged at the rear part of the lower end of the mounting plate 3; the diameter of the cross section of the shaft lever 8 is not larger than that of the cross section of the through hole 33, the shaft lever 8 is rotatably connected in the through hole 33, the limiting block 9 is positioned above the convex plate 32, and the lower end face of the limiting block 9 is tightly attached to the upper end face of the convex plate 32.

It can be seen that, cooperate through stopper 9, through-hole 33 and axostylus axostyle 8 to can make whole mounting panel 3 can use axostylus axostyle 8 to rotate as the axle center, and then adjust whole adjusting part 6, first splint 4 and the angle of second splint 5 through the position of adjusting mounting panel 3.

Referring to fig. 5, in the present invention, the adjusting assembly 6 includes a fixing base 61, a sliding slot 63 is formed in the middle of the upper end of the fixing base 61, a vertical plate 62 perpendicular to the sliding slot 63 is fixedly installed on the front portion of the upper end of the fixing base 61, a sliding block 65 is slidably connected in the sliding slot 63, a sliding plate 64 is fixedly installed on the upper end of the sliding block 65, the lower end surface of the sliding plate 64 is tightly attached to the upper end surface of the fixed seat 61, the second clamping plate 5 is fixedly arranged in the middle of the upper end of the sliding plate 64 and is of an integrated structure with the sliding plate, a stabilizing plate 67 is fixedly arranged at the rear part of the upper end of the fixed seat 61, a screw 66 is rotatably connected in the middle of the rear end of the sliding plate 64, the rear end of the screw 66 penetrates through the stabilizing plate 67 and extends to the rear part of the stabilizing plate and is, the screw 66 is connected with the stabilizing plate 67 by threads, a spiral spring 68 is fixedly mounted between the stabilizing plate 67 and the sliding plate 64, and the spiral spring 68 is sleeved on the outer wall of the screw 66 and does not contact with the screw.

Therefore, when the tripod ball needs to be fixed, the rotary disc 69 is rotated first, so that the rotary disc 69 drives the screw 66 to rotate, the screw 66 is connected with the stabilizing plate 67 in a threaded manner, and the screw 66 is connected with the sliding plate 64 in a bearing manner, so that the screw 66, the rotary disc 69 and the sliding plate 64 can approach the vertical plate 62 together, the second clamping plate 5 approaches the first clamping plate 4, at the moment, the sliding block 65 slides in the sliding groove 63, a certain limiting effect is achieved on the sliding block 65 to assist the displacement of the sliding block, when the distance between the second clamping plate 5 and the first clamping plate 4 is small enough, the inner shaft sleeve of the tripod ball to be processed is placed outside the first clamping plate 4 and the second clamping plate 5, the rotary disc 69 is rotated reversely, namely, the sliding plate 64 is far away from the vertical plate 62, so that the first clamping plate 4 and the second clamping plate 5 are far away from each other until the inner shaft sleeve of the tripod ball is clamped tightly, the axle sleeve is located 11 up end in backup pad in the tripod at this moment, accomplishes fixed work promptly, and whole easy operation is convenient, and work efficiency is high.

In order to smoothly carry out the above process, the invention is further provided with the coil spring 68 between the stabilizing plate 67 and the sliding plate 64, the coil spring 68 is sleeved on the outer wall of the screw 66 and is not contacted with the screw, in addition, the coil spring 68 is always in a contraction state, namely, the coil spring 68 can always give a certain thrust to the sliding block 65, so as to be matched with the screw 66 to control the position of the sliding block 65.

Referring to fig. 6, in the present invention, the stabilizing assembly 12 includes a fixing block 121 fixedly mounted at the rear end of the first clamping plate 4 and a connecting plate 125 fixedly mounted at the front end of the second clamping plate 5, a rectangular groove 122 is formed at one end of the fixing block 121 close to the connecting plate 125, a buffer spring 123 is fixedly mounted on a sidewall of the rectangular groove 122, a bearing plate 124 is fixedly connected to one end of the connecting plate 125 close to the fixing block 121, and one end of the bearing plate 124 close to the fixing block 121 extends into the rectangular groove 122 and is fixedly connected to the buffer spring 123.

It should be noted that the fixing block 121 and the first clamping plate 4 are integrally formed, the bearing plate 124 and the connecting plate 125 are integrally formed with the second clamping plate 5, the whole connecting strength is high, the tensile and pressure resistance is high, in the process that the first clamping plate 4 and the second clamping plate 5 are close to each other or far away from each other, the bearing plate 124 slides in the rectangular groove 122, the top wall and the bottom wall of the bearing plate 124 are tightly attached to the top wall and the bottom wall of the rectangular groove 122 respectively, so that a certain supporting force can be provided in the vertical direction through the two stabilizing assemblies 12, the practical use process can be effectively avoided, the operation is improper due to a user, the rotating turntable 69 is too large in amplitude to cause the deformation of the first clamping plate 4 and the second clamping plate 5, and the fixing effect of the shaft sleeve in the tripod ball pin is improved.

Referring to fig. 7, in the present invention, the fastening mechanism 31 includes a vertical rod 314 fixedly mounted at the rear portion of the lower end of the mounting plate 3 and a threaded sleeve 312 threadedly connected to the lower portion of the outer surface of the vertical rod 314, the lower end of the vertical rod 314 extends to the lower side of the bottom plate 1 through the semi-annular groove 7, the lower end of the threaded sleeve 312 is fixedly connected with a ball valve 311, the ball valve 311 and the threaded sleeve 312 are integrally formed, the ball valve 311 and the threaded sleeve 312 are jointly provided with a mounting groove 315 at the middle portion of the upper end thereof, the vertical rod 314 is threadedly connected in the mounting groove 315, and; the cushion rubber washer 313 is located between the bottom plate 1 and the thread bushing 312, and the size of the cushion rubber washer 313 is larger than that of the half annular groove 7.

It should be noted that the depth of the mounting groove 315 should be at least as long as the vertical rod 314 is located below the bottom plate 1, in the process of adjusting the angle, the mounting plate 3 can rotate around the shaft rod 8, at this time, the vertical rod 314 slides in the semi-annular groove 7, so that the processing conditions of the tripod can be observed at different angles, and in the processing process, the tripod needs to be kept fixed, at this time, only the ball valve 311 needs to be rotated, so that the ball valve 311 and the threaded sleeve 312 move upwards together, the bottom plate 1 is clamped by the ball valve 311 and the threaded sleeve 312 through the buffer rubber washer 313, so that a good fixing effect is achieved, and the whole mounting plate 3 and the bottom plate 1 are kept relatively fixed.

The working principle of the invention is that firstly the rotary disc 69 is rotated to make the rotary disc 69 drive the screw 66 to rotate, because the connection mode of the screw 66 and the stabilizing plate 67 is threaded connection and the connection mode of the screw 66 and the sliding plate 64 is bearing connection, the screw 66, the rotary disc 69 and the sliding plate 64 can approach the vertical plate 62 together, so that the second clamping plate 5 approaches the first clamping plate 4, at the same time, the sliding block 65 slides in the sliding groove 63, a certain limiting effect is achieved on the sliding block 65 to assist the displacement of the sliding block, when the distance between the second clamping plate 5 and the first clamping plate 4 is small enough, the three-ball pin inner shaft sleeve to be processed is placed outside the first clamping plate 4 and the second clamping plate 5, the rotary disc 69 is rotated reversely, namely, the sliding plate 64 is far away from the vertical plate 62, so that the first clamping plate 4 and the second clamping plate 5 are far away from each other until the three-ball pin inner shaft sleeve is clamped, at the time, the three-, accomplish fixing work promptly, and in the course of working, the angle that needs to the tripod is adjusted so that when observing, through stopper 9, through-hole 33 and axostylus axostyle 8 cooperate, thereby can make whole mounting panel 3 can use axostylus axostyle 8 to rotate as the axle center, vertical pole 314 slides in semi-annular groove 7 this moment, can be convenient for observe the behavior of processing of tripod at different angles, and in the course of working, need make the tripod keep fixed, only need rotate ball valve 311 this moment, make it and thread bush 312 together upward movement, will utilize ball valve 311 and thread bush 312 to press from both sides bottom plate 1 through cushion rubber packing ring 313, thereby play good fixed effect, make whole mounting panel 3 and bottom plate 1 keep relatively fixed.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a multi-angle positioning fixture is used in processing of three ball round pins, includes bottom plate (1), its characterized in that: supporting legs (2) are fixedly mounted at four corners of the lower end of the bottom plate (1), a mounting plate (3) is fixedly mounted in the middle of the upper end of the bottom plate (1), a first clamping plate (4) is fixedly mounted at the front part of the upper end of the mounting plate (3), an adjusting assembly (6) is fixedly mounted at the rear part of the upper end of the mounting plate (3), a second clamping plate (5) is arranged at the upper end of the adjusting assembly (6), and a semi-annular groove (7) is formed in the middle of the upper end of the bottom;

the terminal surface of keeping away from each other of first splint (4) and second splint (5) is the arcwall face, and a plurality of sand grips (10) of the equal equidistance fixedly connected with in one end and backup pad (11) that first splint (4) and second splint (5) kept away from each other, two stabilizing component (12) of common fixedly connected with between first splint (4) and second splint (5).

2. The multi-angle positioning fixture for machining the three-ball pin as claimed in claim 1, wherein: the front part of the upper end of the bottom plate (1) is fixedly provided with a shaft lever (8), the upper end of the shaft lever (8) is fixedly provided with a limiting block (9), the limiting block (9) is positioned at the circle center of the semicircular groove (7), and the shaft lever (8) is connected in a threaded manner.

3. The multi-angle positioning fixture for machining the three-ball pin as claimed in claim 1, wherein: mounting panel (3) are long cubic structure, and mounting panel (3) front end fixed mounting has flange (32), flange (32) and mounting panel (3) are the integrated into one piece structure, and flange (32) upper end middle part is seted up through-hole (33) of break-over from top to bottom, mounting panel (3) lower extreme rear portion is provided with fastening device (31).

4. The multi-angle positioning jig for machining a tripod according to claim 2 or 3, wherein: the diameter of the cross section of the shaft lever (8) is not larger than that of the cross section of the through hole (33), the shaft lever (8) is rotatably connected in the through hole (33), the limiting block (9) is positioned above the convex plate (32), and the lower end face of the limiting block (9) is tightly attached to the upper end face of the convex plate (32).

5. The multi-angle positioning fixture for machining the three-ball pin as claimed in claim 1, wherein: the adjusting component (6) comprises a fixed seat (61), a sliding groove (63) is formed in the middle of the upper end of the fixed seat (61), a vertical plate (62) perpendicular to the sliding groove (63) is fixedly arranged on the front portion of the upper end of the fixed seat (61), a sliding block (65) is connected in the sliding groove (63), a sliding plate (64) is fixedly arranged on the upper end of the sliding block (65), the upper end face of the fixed seat (61) is tightly attached to the lower end face of the sliding plate (64), a second clamping plate (5) is fixedly arranged in the middle of the upper end of the sliding plate (64) and is of an integrally formed structure, a stabilizing plate (67) is fixedly arranged on the rear portion of the upper end of the fixed seat (61), a screw rod (66) is rotatably connected to the middle of the rear end of the sliding plate (64), the rear end of the screw rod (66) penetrates through the stabilizing plate (67), and a spiral spring (68) is fixedly arranged between the stabilizing plate (67) and the sliding plate (64) together, and the spiral spring (68) is sleeved on the outer wall of the screw rod (66) and is not in contact with the screw rod.

6. The multi-angle positioning fixture for machining the three-ball pin as claimed in claim 1, wherein: stabilize subassembly (12) including fixed mounting in fixed block (121) of first splint (4) rear end and connecting plate (125) of fixed mounting and second splint (5) front end, rectangular channel (122) have been seted up to fixed block (121) one end that is close to connecting plate (125), the lateral wall fixed mounting of rectangular channel (122) has buffer spring (123), one end fixedly connected with loading board (124) that connecting plate (125) are close to fixed block (121), loading board (124) are close to the one end of fixed block (121) extend to in rectangular channel (122) and are in the same place with buffer spring (123) fixed connection.

7. The multi-angle positioning fixture for machining the tripod head as claimed in claim 3, wherein: fastening device (31) are including vertical pole (314) and the threaded connection of fixed mounting in mounting panel (3) lower extreme rear portion at vertical pole (314) surface lower part thread bush (312), vertical pole (314) lower extreme runs through semi-annular groove (7) and extends to bottom plate (1) below, thread bush (312) lower extreme fixedly connected with ball valve (311), and ball valve (311) and thread bush (312) be the integrated into one piece structure, mounting groove (315) have been seted up jointly in ball valve (311) and thread bush (312) upper end middle part, vertical pole (314) threaded connection is in mounting groove (315), vertical pole (314) surface middle part still overlaps and is equipped with buffering rubber packing ring (313).

8. The multi-angle positioning fixture for machining the tripod head as claimed in claim 7, wherein: the buffer rubber gasket (313) is positioned between the bottom plate (1) and the thread bushing (312), and the size of the buffer rubber gasket (313) is larger than that of the semi-annular groove (7).

9. The multi-angle positioning fixture for machining the three-ball pin as claimed in claim 1, wherein: the preferable nitrile rubber of sand grip (10) preparation material, it bonds in an terminal surface that first splint (4) and second splint (5) kept away from each other through powerful adhesive, a plurality of sand grips (10) on first splint (4) and second splint (5) all form two support areas at the co-altitude not, backup pad (11) are located every respectively under the support area.