CN217072153U

CN217072153U - Work fixture for adjusting arm shell

Info

Publication number: CN217072153U
Application number: CN202221037852.4U
Authority: CN
Inventors: 郑小平
Original assignee: Zhejiang Tianyuan Electromechanical Co ltd
Current assignee: Zhejiang Tianyuan Electromechanical Co ltd
Priority date: 2022-04-28
Filing date: 2022-04-28
Publication date: 2022-07-29
Anticipated expiration: 2032-04-28

Abstract

The utility model provides a frock clamp of adjustment arm casing belongs to anchor clamps technical field. The method solves the problems of small processing range and insufficient applicability. It includes base plate and a plurality of centre gripping units that set up on the base plate, the centre gripping unit is including fixing on the base plate and supplying the base that the adjustment arm casing leaned on, the centre gripping unit still includes two lever pneumatic cylinders one that are fixed in on the base plate and lie in the bottom plate both sides, the piston rod of two lever pneumatic cylinders one sets up and the relative setting of briquetting of two lever pneumatic cylinders one up, briquetting tip upside of two lever pneumatic cylinders one all has the face of stepping down, two briquettings can be put into respectively in the big worm hole both ends of adjustment arm casing or put out in the big worm hole both ends of adjustment arm casing through respective face of stepping down when the piston rod of place lever pneumatic cylinder one is flexible. It has the advantages of wide processing range, wide applicability and the like.

Description

Work fixture for adjusting arm shell

Technical Field

The utility model belongs to the technical field of anchor clamps, a frock clamp of adjustment arm casing is related to.

Background

The brake clearance of the automobile is the clearance which must be kept between the brake drum and the friction lining of the brake shoe, and the friction lining is worn out in long-term friction to cause the brake clearance to be larger, so a brake adjusting arm which can automatically adjust the brake clearance between the brake shoe and the brake drum must be arranged in a brake mechanism, for example, an automatic adjusting arm of the brake clearance of the automobile with the patent application number of 03279067.8, wherein the adjusting arm comprises an adjusting arm shell, and a worm wheel, a large worm, a small worm and the like which are all arranged in the adjusting arm shell. The adjusting arm shell is provided with a worm wheel hole, a large worm hole and a small worm hole, the worm wheel hole is perpendicular to the opening direction of the large worm hole and partially coincides with the opening direction of the large worm hole, the small worm hole is parallel to the worm wheel hole and communicated with one end face of the adjusting arm shell, and meanwhile, the small worm hole is partially coincident with the large worm hole.

At present, the adjusting arm housing is made of a cast blank as shown in fig. 1, and is provided with a worm hole 1 and a large worm hole 2, and a protrusion 3 at the side thereof. Then, it is necessary to machine a small worm hole in the adjustment arm housing, machine a mounting hole for fixing the adjustment arm housing to a cover plate in a control arm assembly of the adjustment arm assembly, and perform finish machining of a worm hole, a large worm hole, an end face, and the like. Because the adjusting arm shell is special in shape, a specially-arranged tool clamp is needed to clamp the blank, and the blank can be machined by using the machining center. For example, the patent application No. 201820908073.4 discloses a processing tool for an automatic adjusting arm shell, which is installed in a processing center to position and install the shell, and comprises a base plate, a plurality of positioning and locking mechanisms installed on the base plate, a plurality of positioning mandrels embedded on the surface of the base plate, and a shell sleeved on the positioning mandrels; the positioning locking mechanism comprises a thin hydraulic cylinder, a horizontal locking mechanism and two vertical locking mechanisms; the thin hydraulic cylinder is fixed on the back of the base, and a connecting plate is arranged on a telescopic rod of the thin hydraulic cylinder; the two vertical locking mechanisms are symmetrically arranged on two sides of the thin hydraulic cylinder to realize pressing in the vertical direction of the shell, the vertical locking mechanisms are symmetrically arranged on two sides of the thin hydraulic cylinder and comprise two connecting rods and pressing blocks, the lower ends of the two connecting rods respectively penetrate through the base and are fixed with the connecting plates, and the two pressing blocks are respectively fixed at the upper ends of the two connecting rods; the horizontal locking mechanisms are fixed on the base plate and located on two sides of the positioning mandrel, and positioning of the shell in the horizontal direction is achieved. Through the locking of the shell along the vertical direction and the locking of the shell along the horizontal direction, the shell can be firmly positioned, and therefore the required machining can be well completed by matching with a machining center.

However, the processing tool also has the following defects: the thin hydraulic cylinder drives the two pressing blocks to press the shell simultaneously to enable the shell to be locked in the vertical direction, and the two pressing blocks can be directly pressed on the end face of the shell by combining the attached drawings of the specification, so that only finish machining of a worm hole and machining of a small worm hole can be completed by matching the machining tool in a machining center, but the finish machining of the end face of the shell cannot be completed due to the existence of the two pressing blocks, and the problems of small machining range and insufficient applicability exist.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned problem that prior art exists, provide a frock clamp of adjustment arm casing, solved the problem that the range of working is little and the suitability is not enough.

The purpose of the utility model can be realized by the following technical proposal:

the fixture for the adjusting arm shell comprises a base plate and a plurality of clamping units arranged on the base plate, wherein the clamping units comprise bases which are fixed on the base plate and are used for the adjusting arm shell to abut against.

And in an initial state, the piston rods of the first two lever-type hydraulic cylinders are controlled to move downwards, so that the press blocks of the first two lever-type hydraulic cylinders swing upwards around respective hinge points. When the adjusting arm shell is clamped, the adjusting arm shell is abutted against the base in a mode that one end face of the port of the worm gear hole faces upwards, then piston rods of the two first lever type hydraulic cylinders are controlled to move upwards, pressing blocks of the two first lever type hydraulic cylinders swing downwards around respective hinged points, the end portions of the pressing blocks of the two first lever type hydraulic cylinders swing into the two end holes of the large worm hole of the adjusting arm shell and press downwards on the inner walls of the two end holes of the large worm hole, and therefore the adjusting arm shell is pressed tightly in the vertical direction. This frock clamp passes through the use of lever pneumatic cylinder one and sets up the face of stepping down at the tip upside of its briquetting for in the both ends drill way that the position that compresses tightly the adjusting arm casing shifts to big worm hole from adjusting arm casing terminal surface, it can firmly be pressed from both sides tightly so both to have guaranteed that the adjusting arm casing can be pressed from both sides, make an adjusting arm casing terminal surface at worm wheel hole place again simultaneously can let out completely, not only can carry out the finish machining in worm wheel hole and the processing in little worm hole on the adjusting arm casing like this, can also process the terminal surface of adjusting arm casing, thereby the machining scope has been improved, and the suitability has been improved.

In the tooling clamp for adjusting the arm shell, the abdicating surface is arc-shaped, and the cross section of the end part of the pressing block of the first lever-type hydraulic cylinder is gradually reduced towards the direction close to the first lever-type hydraulic cylinder.

Through the arrangement, the end part of the pressing block of the first lever type hydraulic cylinder can smoothly swing into the orifice of the large worm hole or swing out of the orifice of the large worm hole.

In the tooling clamp for adjusting the arm shell, the clamping unit further comprises a second lever-type hydraulic cylinder fixed on the base plate, a piston rod of the second lever-type hydraulic cylinder is arranged upwards, a pressing block of the second lever-type hydraulic cylinder is parallel to a pressing block of the first lever-type hydraulic cylinder, and a pressing part capable of pressing the pressing block on the side part of the arm shell when the end part of the pressing block swings downwards is arranged on the pressing block side of the second lever-type hydraulic cylinder.

On the basis of the two lever type hydraulic cylinders I, the use of the lever type hydraulic cylinder II is increased, the pressing point of the adjusting arm shell can be increased, and the clamping effect is improved. Meanwhile, the pressing part at the side part of the pressing block of the second lever type hydraulic cylinder presses on the pressing block at the side part of the adjusting arm shell, and the end surface of the adjusting arm shell is not involved.

In the above tooling fixture for the adjusting arm shell, the lower side of the pressing part is provided with a yielding notch in which the convex block at the side part of the adjusting arm shell can be embedded.

The arrangement of the abdicating notch can ensure that the pressing part is not higher than the end face of the adjusting arm shell after being abutted against the convex block, thereby avoiding the influence caused during the end face processing.

In the above-mentioned frock clamp of adjusting arm casing, the base include the pedestal, fix on the pedestal and two locating pieces that set up relatively and vertically fix the reference column on the pedestal, the upside of two locating pieces has the V type groove that can supply the adjusting arm casing of big worm hole both ends orifice department to support to lean on respectively.

In the tooling clamp for the adjusting arm shell, the positioning column is in threaded connection with the base body, and a locking nut is further in threaded connection with the positioning column.

Set up the reference column and pedestal into threaded connection, can adjust its tip height in order to guarantee terminal surface and horizontal direction's depth of parallelism through rotating the reference column to guarantee processingquality.

In the tooling fixture for adjusting the arm shell, the side of the seat body is fixed with the limiting block, the limiting block is positioned on one side of one of the positioning blocks, which faces away from the other positioning block, the side of the upper end of the limiting block is provided with the raised head which extends into the V-shaped groove of the positioning block, the other positioning block is fixed with the elastic limiting part, the elastic limiting part is partially positioned in the V-shaped groove of the positioning block, and the raised head and the elastic limiting part are respectively abutted against the orifices at two ends of the large worm hole on the adjusting arm shell when the adjusting arm shell is abutted against the base.

During clamping, the adjusting arm shells at the hole openings at the two ends of the large worm hole are abutted against the V-shaped grooves of the two positioning blocks, the hole opening position of one end of the large worm hole is abutted against the raised head of the limiting block, and the elastic limiting block is abutted against the hole opening position of the other end of the large worm hole, so that the adjusting arm shells are limited along the direction of the central line of the large worm hole.

In the above-mentioned frock clamp of adjusting arm casing, the elasticity locating part including fix the overcoat in the locating piece and all set up spring and driving lever in the overcoat, the driving lever stretches out the overcoat to the V type inslot of the locating piece that the elasticity locating part is located in the spring effect part down, and has the pole head that the external diameter diminishes gradually from top to bottom on the driving lever.

Compared with the prior art, this frock clamp of adjustment arm casing sets up the face of stepping down through the use of lever pneumatic cylinder one and at the tip upside of its briquetting for in adjusting the both ends drill way that arm casing terminal surface shifts to big worm hole to the position that compresses tightly of arm casing, it can firmly be pressed from both sides tightly so both to have guaranteed that the adjustment arm casing can be pressed from both sides, make an adjustment arm casing terminal surface at worm wheel hole place again simultaneously and let out completely, not only can carry out the finish machining in worm wheel hole and the processing in little worm hole on the adjustment arm casing, can also process the terminal surface of adjustment arm casing, thereby machining range has been improved, and the suitability has been improved.

Drawings

FIG. 1 is a schematic view of a cast arm housing.

Fig. 2 is a schematic view of the present tooling fixture.

Figure 3 is a schematic view of a single clamping unit in the present tool clamp.

Figure 4 is another perspective view of a single clamping unit of the present tool clamp.

Fig. 5 is a schematic view at the base in a single clamping unit.

Fig. 6 is a schematic view of a single clamping unit clamping the adjustment arm housing.

Fig. 7 is another angle view of the single clamping unit clamping the adjustment arm housing.

Fig. 8 is a sectional view of a single clamping unit clamping the adjustment arm housing.

In the figure, 1, a worm wheel hole; 2. a large worm hole; 3. a bump; 4. a substrate; 5. a base; 6. a first lever type hydraulic cylinder; 6a, a yielding surface; 7. a lever type hydraulic cylinder II; 7a, a pressing part; 7a1, abdication gap; 8. a base body; 9. positioning blocks; 9a, a V-shaped groove; 10. a positioning column; 11. locking the nut; 12. a floating support cylinder; 13. a limiting block; 13a, a raised head; 14. an elastic limiting part; 14a, a jacket; 14b, a spring; 14c, a deflector rod.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 2, fig. 3 and fig. 4, the work fixture for adjusting the arm shell comprises a base plate 4 and a plurality of clamping units arranged on the base plate 4, each clamping unit comprises a base 5 fixed on the base plate 4 and used for the adjustment arm shell to abut against, and two lever-type hydraulic cylinders 6 fixed on the base plate 4 and located on two sides of the base 5, piston rods of the two lever-type hydraulic cylinders 6 are arranged upwards, and pressing blocks of the two lever-type hydraulic cylinders 6 are arranged oppositely. The upper sides of the end parts of the pressing blocks of the two lever-type hydraulic cylinders 6 are respectively provided with a abdicating surface 6a, and the two pressing blocks can respectively swing into the two end openings of the large worm hole 2 of the adjusting arm shell (both blank parts are aimed at here) or swing out of the two end openings of the large worm hole 2 of the adjusting arm shell through the respective abdicating surfaces 6a when the piston rod of the lever-type hydraulic cylinder 6 is stretched. The abdicating surface 6a is arc-shaped, and the cross section of the end part of the pressing block of the first lever-type hydraulic cylinder 6 is gradually reduced towards the direction close to the first lever-type hydraulic cylinder 6. The clamping unit further comprises a second lever type hydraulic cylinder 7 fixed on the base plate 4, a piston rod of the second lever type hydraulic cylinder 7 is arranged upwards, a pressing block of the second lever type hydraulic cylinder 7 is parallel to a pressing block of the first lever type hydraulic cylinder 6, and a pressing part 7a capable of pressing the pressing block on the side part of the adjusting arm shell when the end part of the pressing block swings downwards is arranged on the pressing block side of the second lever type hydraulic cylinder 7. The lower side of the pressing part 7a is provided with an abdicating notch 7a1 which can be inserted by the convex block 3 at the side part of the adjusting arm shell.

And in an initial state, the piston rods of the two first lever type hydraulic cylinders 6 and the piston rods of the second lever type hydraulic cylinders 7 are controlled to move downwards, so that the pressing blocks of the two first lever type hydraulic cylinders 6 and the pressing blocks of the second lever type hydraulic cylinders 7 swing upwards around respective hinged points. During clamping, the adjusting arm shell is abutted against the base 5 in a mode that one end face of the port of the worm wheel hole 1 faces upwards, then the piston rods of the two lever-type hydraulic cylinders 6 and the piston rods of the two lever-type hydraulic cylinders 7 are controlled to move upwards, so that the pressing blocks of the two lever-type hydraulic cylinders 6 and the pressing blocks of the two lever-type hydraulic cylinders 7 swing downwards around respective hinge points, the end parts of the pressing blocks of the two lever-type hydraulic cylinders 6 swing into the holes at the two ends of the large worm hole 2 of the adjusting arm shell and press downwards on the inner walls of the holes at the two ends of the large worm hole 2, meanwhile, the pressing parts 7a at the side parts of the pressing blocks of the two lever-type hydraulic cylinders 7 press downwards on the convex blocks 3 at the side parts of the adjusting arm shell, and the clamped state of the adjusting arm shell is shown in fig. 6, 7 and 8. In this way, the adjusting arm housing is pressed in the vertical direction. Through the arrangement, on the basis that the adjusting arm shell is firmly pressed in the vertical direction, the end face of the adjusting arm shell where the worm wheel hole 1 is located can be completely avoided, so that the fine machining of the worm wheel hole 1 and the machining of the small worm hole can be performed on the adjusting arm shell, and the end face of the adjusting arm shell can be machined.

Further, as shown in fig. 3, 4, 5, and 6, the base 5 includes a base body 8, two positioning blocks 9 fixed on the base body 8 and oppositely disposed, and a positioning column 10 vertically fixed on the base body 8, wherein the upper sides of the two positioning blocks 9 respectively have V-shaped grooves 9a for the adjusting arm housings at the two end orifices of the large worm hole 2 to abut against. Specifically, the adjusting arm housings at the openings of the two ends of the large worm hole 2 abut against the V-shaped grooves 9a of the two positioning blocks 9, and the positioning column 10 abuts against the other end surface of the adjusting arm housing. The positioning column 10 is in threaded connection with the base body 8, and a locking nut 11 is further in threaded connection with the outside of the positioning column 10. Set up reference column 10 and pedestal 8 into threaded connection, can adjust its tip height in order to guarantee terminal surface and horizontal direction's depth of parallelism through rotating reference column 10 to guarantee processingquality. In this embodiment, the base body 8 is further integrated with an upward floating support cylinder 12, and the floating support cylinder 12 can play a role of auxiliary support along the vertical direction, so that the base body is more stable.

Further, as shown in fig. 5, a limiting block 13 is fixed to a side portion of the seat body 8, the limiting block 13 is located at a side of one of the positioning blocks 9 facing away from the other positioning block 9, a protruding head 13a extending into the V-shaped groove 9a of the positioning block 9 is provided at an upper end side portion of the limiting block 13, an elastic limiting member 14 is fixed to the other positioning block 9, and a part of the elastic limiting member 14 is located in the V-shaped groove 9a of the positioning block 9, and when the adjustment arm housing abuts against the base 5, the protruding head 13a and the elastic limiting member 14 abut against two end orifices of the large worm hole 2 of the adjustment arm housing, respectively. Specifically, as shown in fig. 8, the elastic limiting member 14 includes an outer sleeve 14a fixed in the positioning block 9, and a spring 14b and a shift lever 14c both disposed in the outer sleeve 14a, the shift lever 14c partially extends out of the outer sleeve 14a under the elastic force of the spring 14b to the V-shaped groove 9a of the positioning block 9 where the elastic limiting member 14 is located, and the shift lever 14c has a rod head with an outer diameter gradually decreasing from top to bottom. As shown in fig. 8, during clamping, the adjusting arm housings at the orifices of the two ends of the large worm hole 2 are abutted against the V-shaped grooves 9a of the two positioning blocks 9, and the orifice position of one end of the large worm hole 2 is ensured to be abutted against the raised head 13a of the limiting block 13, and the side part of the rod head of the elastic limiting piece 14 is abutted against the orifice position of the other end of the large worm hole 2, so that the adjusting arm housings are limited along the direction of the center line of the large worm hole 2.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The work fixture for adjusting the arm shell comprises a base plate (4) and a plurality of clamping units arranged on the base plate (4), the clamping unit comprises a base (5) which is fixed on the base plate (4) and against which the adjusting arm shell abuts, the clamping unit is characterized by further comprising two first lever-type hydraulic cylinders (6) which are fixed on the base plate (4) and located on two sides of the base plate, piston rods of the first lever-type hydraulic cylinders (6) are arranged upwards, pressing blocks of the first lever-type hydraulic cylinders (6) are arranged oppositely, the upper sides of the end portions of the pressing blocks of the first lever-type hydraulic cylinders (6) are provided with abdicating surfaces (6a), and the two pressing blocks can be respectively placed into two ports of a large worm hole (2) of the adjusting arm shell or placed out of two ports of the large worm hole (2) of the adjusting arm shell through the respective abdicating surfaces (6a) when the piston rods of the first lever-type hydraulic cylinders (6) are stretched.

2. The work fixture for the adjusting arm shell according to claim 1, wherein the receding surface (6a) is arc-shaped, and the cross section of the pressing block end of one lever type hydraulic cylinder (6) is gradually reduced towards the direction close to the other lever type hydraulic cylinder (6).

3. The work fixture for the adjusting arm shell according to claim 2, characterized in that the clamping unit further comprises a second lever type hydraulic cylinder (7) fixed on the base plate (4), a piston rod of the second lever type hydraulic cylinder (7) is arranged upwards, a pressing block of the second lever type hydraulic cylinder (7) is parallel to a pressing block of the first lever type hydraulic cylinder (6), and a pressing part (7a) capable of pressing the pressing block on the side part of the adjusting arm shell when the end part of the pressing block swings downwards is arranged on the pressing block side of the second lever type hydraulic cylinder (7).

4. The tooling clamp for the adjusting arm shell according to claim 3, wherein the lower side of the pressing part (7a) is provided with an abdicating notch (7a1) for the convex block (3) at the side part of the adjusting arm shell to be embedded.

5. The tooling clamp for the adjusting arm housing according to claim 1, 2, 3 or 4, wherein the base (5) comprises a base body (8), two positioning blocks (9) fixed on the base body (8) and oppositely arranged, and positioning columns (10) vertically fixed on the base body (8), and the upper sides of the two positioning blocks (9) are respectively provided with a V-shaped groove (9a) for the adjusting arm housing at the two end orifices of the large worm hole (2) to abut against.

6. The tooling clamp for the adjusting arm shell according to claim 5, wherein the positioning column (10) is in threaded connection with the base body (8), and a locking nut (11) is further in threaded connection with the outside of the positioning column (10).

7. The tooling clamp for adjusting the arm casing according to claim 5, wherein a limiting block (13) is fixed on the side of the seat body (8), the limiting block (13) is positioned on the side of one of the positioning blocks (9) facing away from the other positioning block (9), the side of the upper end of the limiting block (13) is provided with a raised head (13a) extending into the V-shaped groove (9a) of the positioning block (9), an elastic limiting piece (14) is fixed in the other positioning block (9), the elastic limiting piece (14) is partially positioned in the V-shaped groove (9a) of the positioning block (9), and the raised head (13a) and the elastic limiting piece (14) respectively abut against the orifices at two ends of the large worm hole (2) on the adjusting arm casing when the adjusting arm casing abuts against the base (5).

8. The tooling fixture for adjusting the arm casing according to claim 7, wherein the elastic limiting piece (14) comprises an outer sleeve (14a) fixed in the positioning block (9), and a spring (14b) and a shift lever (14c) both arranged in the outer sleeve (14a), the shift lever (14c) partially extends out of the outer sleeve (14a) to the V-shaped groove (9a) of the positioning block (9) where the elastic limiting piece (14) is located under the elastic force of the spring (14b), and the shift lever (14c) is provided with a rod head with an outer diameter gradually decreasing from top to bottom.