CN213195689U

CN213195689U - Eccentric shaft clamp

Info

Publication number: CN213195689U
Application number: CN202022162996.XU
Authority: CN
Inventors: 胡豪; 胡军; 丁焕明; 周成春
Original assignee: Hangzhou Weida Casting Co ltd
Current assignee: Hangzhou Weida Casting Co ltd
Priority date: 2020-09-27
Filing date: 2020-09-27
Publication date: 2021-05-14
Anticipated expiration: 2030-09-27

Abstract

The application relates to the field of machining, in particular to an eccentric shaft clamp which comprises a rotary table, a mounting block, an insertion hole and a locking mechanism, wherein the rotary table is provided with a connecting flange; the turntable is also provided with an adjusting mechanism for adjusting the distance between the axis of the mounting block and the axis of the turntable; the adjusting mechanism comprises a sliding groove which is arranged on the rotary table along the radial direction of the rotary table and is used for the mounting block to slide and tightly attach, and a threaded rod which is rotatably connected in the sliding groove and has the same length direction with the sliding groove, and the threaded rod passes through the mounting block and is in threaded fit with the mounting block; the adjusting mechanism further comprises a hand crank arranged at one end of the threaded rod and used for rotating the threaded rod. Compared with the prior art, the operation of staff's installation gasket has been saved to this scheme, and the staff only can adjust the required eccentricity of processing eccentric shaft through rotatory threaded rod, has promoted the clamping efficiency of eccentric shaft.

Description

Eccentric shaft clamp

Technical Field

The application relates to the field of machining, in particular to an eccentric shaft clamp.

Background

The eccentric shaft is a workpiece with an excircle parallel to and misaligned with the axis of the excircle, and the distance between two parallel axes is called eccentricity.

At present, the eccentric shaft workpiece is machined by adding a gasket on a three-jaw chuck to realize the eccentricity between the workpiece and a lathe spindle. Before a workpiece is clamped, a worker needs to place a gasket on one clamping jaw in the three-jaw chuck, and then can clamp the workpiece by using the three clamping jaws. When placing the gasket, the staff need frequently adjust the position of gasket in order to press from both sides the work piece tight, and this kind of mode of clamping eccentric shaft work piece is very troublesome to when the required eccentricity of work piece changes, the staff just must change the gasket of another kind of thickness, has seriously reduced the clamping efficiency of eccentric shaft.

SUMMERY OF THE UTILITY MODEL

In order to improve the clamping efficiency of eccentric shaft, this application provides an eccentric shaft anchor clamps.

The application provides a pair of eccentric shaft anchor clamps adopts following technical scheme:

an eccentric shaft clamp comprises a rotary table provided with a connecting flange, a mounting block arranged on the rotary table, an insertion hole formed in the mounting block and used for inserting a workpiece, and a locking mechanism arranged on the mounting block and used for locking the workpiece; the turntable is also provided with an adjusting mechanism for adjusting the distance between the axis of the mounting block and the axis of the turntable; the adjusting mechanism comprises a sliding groove which is arranged on the rotary table along the radial direction of the rotary table and is used for the mounting block to slide and tightly attach, and a threaded rod which is rotatably connected in the sliding groove and has the same length direction with the sliding groove, and the threaded rod passes through the mounting block and is in threaded fit with the mounting block; the adjusting mechanism further comprises a hand crank arranged at one end of the threaded rod and used for rotating the threaded rod.

Through adopting above-mentioned technical scheme, the staff fixes the carousel on the lathe main shaft through flange earlier, then will treat in the plug hole on the turning work piece inserts the installation piece, and fix the work piece in the plug hole through locking mechanical system, the staff rethread hand crank comes the rotatory threaded rod, under the combined action of screw thread traction and spout position restraint, the installation piece just can slide in the spout, the distance between the axis of work piece and the axis of carousel just can change, the eccentricity between work piece and the lathe main shaft can produce, and then accomplished the clamping to the eccentric shaft work piece. Compared with the prior art, the operation of staff's installation gasket has been saved to this scheme, and the staff only can adjust the required eccentricity of processing eccentric shaft through rotatory threaded rod, has promoted the clamping efficiency of eccentric shaft.

Preferably, actuating mechanism including link firmly on the installation piece intercommunication jack and with the sleeve pipe of jack coaxial line, set up on the sleeve pipe and communicate a plurality of caulking grooves of sleeve pipe inside and outside lateral wall, slip inlay establish in the caulking groove and be used for the butt bracing piece of work piece, establish and be used for ordering about the bracing piece to break away from the spring of work piece in the caulking groove to and establish and be used for ordering about simultaneously a plurality of bracing pieces compression corresponding spring and support the drive assembly of tight work piece on the sleeve pipe.

By adopting the technical scheme, a worker firstly inserts the workpiece into the sleeve, then drives the support rods to simultaneously abut against the side walls of the workpiece through the driving assembly, the position of the workpiece is locked, and the spring is compressed; after the workpiece is machined, the working personnel cancel the action effect of the driving assembly on the supporting rod, the supporting rod is separated from the workpiece under the elastic action of the spring, and the working personnel can take the workpiece down. The locking mechanism is simple in structure and convenient for operation of workers.

Preferably, the drive assembly comprises a circular ring sleeved on the sleeve through threads, and inclined planes which are circumferentially arranged on the inner side wall of the circular ring and used for being abutted to the support rods simultaneously, and the distance between each inclined plane and the axis of the sleeve is gradually changed.

Through adopting above-mentioned technical scheme, the rotatory ring of staff makes the ring remove towards the bracing piece, supports the bracing piece until the inclined plane, and the inclined plane will produce an effort towards the sleeve axis to the bracing piece, and along with the staff ring of screwing, the inclined plane just can order about a plurality of bracing pieces simultaneously and support tightly on the lateral wall of work piece to under the traction of screw thread, the bracing piece will continue to support tightly with the work piece. The arrangement of the driving assembly further facilitates the operation of workers.

Preferably, the turntable is provided with scales for displaying the distance between the axis of the mounting block and the axis of the turntable.

Through adopting above-mentioned technical scheme, the scale provides the reference for the staff installation piece that slides for the staff can slide the installation piece to required position fast more, and the adjustment of work piece eccentricity also will be more accurate, has improved the efficiency of eccentric shaft work piece clamping greatly.

Preferably, the rotary table is in threaded connection with a bolt for abutting against the threaded rod.

Through adopting above-mentioned technical scheme, after the adjustment installation piece position, the staff can screw the bolt and support tight threaded rod, and the threaded rod will be restricted rotatory, has avoided installation piece to take place to slide in the rotatory in-process of carousel, has ensured the fashioned accurate nature of work piece eccentric shaft.

Preferably, the sliding groove is internally fixedly connected with a limiting rod parallel to the threaded rod, the mounting block is provided with a limiting hole for the limiting rod to pass through, and the inner side wall of the limiting hole is tightly attached to the side wall of the limiting rod.

Through adopting above-mentioned technical scheme, the setting in gag lever post and spacing hole can make the installation piece only slide in the spout along the axial of threaded rod, has avoided the installation piece to follow the emergence of the rotatory condition of threaded rod effectively, and the adjustment of installation piece position will be more smooth.

Preferably, one end of the threaded rod, which is close to the hand crank, is provided with a slot with a polygonal cross section, and the hand crank is fixedly connected with an insertion block which is inserted into the slot.

Through adopting above-mentioned technical scheme, when needs rotatory threaded rod, the staff can rotate the threaded rod through the crank after inserting the inserted block in the jack. When the threaded rod does not need to be rotated, the staff can extract the insert block from the slot to take the hand crank off the threaded rod, so that the resistance of the hand crank to the rotation of the turntable can be reduced, and the operation of the staff is facilitated by the mode.

Preferably, one end of the support rod, which is close to the workpiece, is provided with an arc-shaped clamping piece.

By adopting the technical scheme, the arc-shaped clamping piece can increase the contact area of the supporting rod and the workpiece, the supporting effect of the supporting rod on the workpiece is improved, and the probability that the eccentric shaft workpiece is rocked in the turning process is reduced.

In summary, the present application includes at least one of the following beneficial technical effects:

1. through the arrangement of the rotary table, the mounting block, the jack, the locking mechanism, the sliding groove, the threaded rod and the hand crank, the operation of mounting a gasket by workers is omitted, and the clamping efficiency of the eccentric shaft is improved;

2. the arrangement of the circular ring and the inclined plane further facilitates the operation of workers;

3. through the arrangement of the scales, a worker can slide the mounting block to a required position more quickly, and the adjustment of the eccentric distance of the workpiece is more accurate;

4. through the arrangement of the arc-shaped clamping piece, the probability that the eccentric shaft workpiece shakes in the turning process is reduced.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a partially enlarged schematic view of a portion a in fig. 1.

Description of reference numerals: 1. a turntable; 2. a connecting flange; 3. mounting blocks; 4. a jack; 5. a sleeve; 6. caulking grooves; 7. a support bar; 8. an arc-shaped clamping piece; 9. a spring; 10. a circular ring; 11. a bevel; 12. a chute; 13. a threaded rod; 14. a hand crank; 15. a slot; 16. inserting a block; 17. calibration; 18. a limiting rod; 19. a limiting hole; 20. and (4) bolts.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

Referring to fig. 1 and 2, an eccentric shaft clamp comprises a circular turntable 1, a connecting flange 2 arranged on the turntable 1 and used for being connected with a lathe spindle, a mounting block 3 arranged on the turntable 1 and having an axis parallel to the axis of the turntable 1, a jack 4 coaxially arranged on the mounting block 3 and used for inserting a workpiece, a sleeve 5 coaxially connected to the mounting block 3 and communicated with the jack 4, three caulking grooves 6 distributed on the wall of the sleeve 5 at equal angles and communicated with the inner wall and the outer wall of the sleeve 5, a support rod 7 slidably embedded in the caulking grooves 6 and used for abutting against the workpiece, an arc-shaped clamping piece 8 fixedly connected to one end of the support rod 7 close to the workpiece, and a spring 9 arranged in the caulking grooves 6 and used for driving the support rod 7 to be separated from the workpiece, wherein when the spring 9 is in a natural state, the support rod 7 is separated from the workpiece, and when the spring 9 is in a compressed state, the; the clamp further comprises a circular ring 10 which is sleeved on the outer side wall of the sleeve 5 in a threaded manner, and a circle of inclined surface 11 which is circumferentially arranged on the inner side wall of the circular ring 10 and used for being abutted to the supporting rod 7, wherein the distance from the inclined surface 11 to the axis of the sleeve 5 is gradually increased along the direction that the circular ring 10 is close to the supporting rod 7. Wherein the circular ring 10 and the inclined plane 11 form a driving assembly; the sleeve 5, the caulking groove 6, the support rod 7, the spring 9 and the driving assembly constitute a locking mechanism. The staff installs carousel 1 on the lathe main shaft through flange 2 earlier, the work piece that will treat the turning passes sleeve pipe 5 and inserts in the jack 4 on the installation piece 3 again, then the staff rotates ring 10 and makes ring 10 remove towards bracing piece 7, inclined plane 11 on the ring 10 inside wall supports after the tip of bracing piece 7, inclined plane 11 will produce an effort towards sleeve pipe 5 axis to bracing piece 7, three spinal branch vaulting poles 7 will compress the corresponding spring 9 and remove towards the work piece, until bracing piece 7 supports on the lateral wall of work piece, the staff screws ring 10 at last and makes bracing piece 7 continuously support tightly on the work piece, thereby accomplish the locking to the work piece position, the staff can carry out lathe work to the work piece through the lathe main shaft rotatory work piece. After the workpiece is machined, the working personnel unscrew the circular ring 10 to eliminate the acting force of the inclined surface 11 on the supporting rod 7, the supporting rod 7 is separated from the workpiece under the action of the elastic force of the spring 9, and the working personnel can take the workpiece off the mounting block 3.

Referring to fig. 1, a sliding groove 12 is formed in the rotary table 1 along the radial direction of the rotary table 1, the mounting block 3 is tightly attached to the sliding groove 12 in a sliding manner, a threaded rod 13 which is the same as the sliding groove 12 in length direction is rotatably connected to the sliding groove 12, and the threaded rod 13 penetrates through the mounting block 3 and is in threaded fit with the mounting block 3; the end of the threaded rod 13 extending out of the sliding groove 12 is also provided with a hand crank 14, one end of the threaded rod 13 close to the hand crank 14 is provided with a slot 15 with a rectangular cross section, and the hand crank 14 is fixedly connected with an insert block 16 for being inserted into the caulking groove 6. The turntable 1 is also provided with a scale 17 for displaying the distance between the axis of the mounting block 3 and the axis of the turntable 1. The sliding groove 12, the threaded rod 13 and the hand crank 14 form an adjusting mechanism. After the work piece is locked in sleeve pipe 5, the staff rotates threaded rod 13 through hand crank 14, under the combined action of screw thread traction and the position constraint of spout 12, installation piece 3 will slide in spout 12, and the distance between installation piece 3 axis and carousel 1 axis just can change, and the required eccentricity of processing eccentric shaft then obtains the adjustment. The staff can refer to the scale 17 on the turntable 1 when rotating the threaded rod 13 so as to control the sliding distance of the mounting block 3, and the adjustment of the eccentricity of the workpiece can be more accurate. After the mounting block 3 slides to a required position, a worker takes the crank 14 off the threaded rod 13 and rotates the workpiece through the lathe spindle to perform eccentric turning on the workpiece to form an eccentric shaft. When the threaded rod 13 needs to be rotated again, a worker inserts the insertion block 16 on the hand crank 14 into the insertion slot 15, so that the operation of the worker is very convenient.

A limiting rod 18 which is parallel to the threaded rod 13 and penetrates through the mounting block 3 is fixedly connected in the sliding groove 12, a limiting hole 19 for the limiting rod 18 to penetrate through is formed in the mounting block 3, and the inner side wall of the limiting hole 19 is tightly abutted to the side wall of the limiting rod 18. When the staff rotated threaded rod 13 and slided installation piece 3, gag lever post 18 can make installation piece 3 only slide in spout 12 along the axial of threaded rod 13, avoided installation piece 3 to break away from the inside wall of spout 12 and follow the threaded rod 13 rotatoryly for the position control of installation piece 3 can go on smoothly.

In order to avoid the mounting block 3 from sliding in the rotating process of the turntable 1, the turntable 1 is further in threaded connection with one bolt 20, a worker can screw the bolt 20 to tightly support the threaded rod 13, the threaded rod 13 cannot rotate any more, the mounting block 3 is always locked by the threads of the threaded rod 13 in the rotating process of the turntable 1, and the accuracy of eccentric shaft forming is guaranteed.

The implementation principle of the embodiment is as follows: after the staff installs carousel 1 on the lathe main shaft, the work piece that will treat the turning passes sleeve pipe 5 and inserts in the jack 4 on the installation piece 3, then the staff rotates ring 10 and makes ring 10 move towards bracing piece 7, inclined plane 11 on the ring 10 inside wall will support bracing piece 7, and produce an effort towards sleeve pipe 5 axis to bracing piece 7, three spinal branch vaulting poles 7 will compress corresponding spring 9 and move towards the work piece, until bracing piece 7 supports on the lateral wall of work piece, the staff screws ring 10 at last and makes bracing piece 7 continuously support tightly on the work piece, thereby accomplish the locking to the work piece position. Staff's rethread hand crank 14 comes rotatory threaded rod 13, and under the combined action of screw thread traction and the 18 position restraints of gag lever post, installation piece 3 will slide in spout 12, and the distance between installation piece 3 axis and the 1 axis of carousel just can change, and the required eccentricity of processing eccentric shaft and then obtain the adjustment, and the staff rotates the lathe main shaft at last and drives the work piece rotation, can carry out eccentric lathe work to the work piece to form the eccentric shaft.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. An eccentric shaft anchor clamps which characterized in that: the device comprises a rotary table (1) provided with a connecting flange (2), a mounting block (3) arranged on the rotary table (1), an insertion hole (4) formed in the mounting block (3) and used for inserting a workpiece, and a locking mechanism arranged on the mounting block (3) and used for locking the workpiece; the turntable (1) is also provided with an adjusting mechanism for adjusting the distance between the axis of the mounting block (3) and the axis of the turntable (1); the adjusting mechanism comprises a sliding groove (12) which is arranged on the rotary table (1) along the radial direction of the rotary table (1) and is used for the mounting block (3) to slide and tightly attach, and a threaded rod (13) which is rotatably connected in the sliding groove (12) and has the same length direction with the sliding groove (12), wherein the threaded rod (13) penetrates through the mounting block (3) and is in threaded fit with the mounting block (3); the adjusting mechanism also comprises a hand crank (14) which is arranged at one end of the threaded rod (13) and is used for rotating the threaded rod (13).

2. The eccentric shaft clamp according to claim 1, wherein: actuating mechanism is including linking firmly sleeve pipe (5) that communicate jack (4) and with jack (4) coaxial on installation piece (3), set up on sleeve pipe (5) and communicate a plurality of caulking grooves (6) of sleeve pipe (5) inside and outside wall, the slip inlays establishes bracing piece (7) that just is used for the butt work piece in caulking groove (6), establish spring (9) that are used for ordering about bracing piece (7) and break away from the work piece in caulking groove (6), and establish and be used for ordering about simultaneously a plurality of bracing pieces (7) on sleeve pipe (5) and compress corresponding spring (9) and support tight work piece's drive assembly.

3. The eccentric shaft clamp according to claim 2, wherein: the driving assembly comprises a circular ring (10) which is sleeved on the sleeve (5) in a threaded manner, and an inclined plane (11) which is arranged on the inner side wall of the circular ring (10) in a circumferential manner and used for being abutted to the plurality of supporting rods (7) simultaneously, wherein the distance between the inclined plane (11) and the axis of the sleeve (5) is gradually changed.

4. The eccentric shaft clamp according to claim 1, wherein: the rotary table (1) is provided with scales (17) for displaying the distance between the axis of the mounting block (3) and the axis of the rotary table (1).

5. The eccentric shaft clamp according to claim 1, wherein: and a bolt (20) for tightly abutting against the threaded rod (13) is connected to the rotary table (1) through threads.

6. The eccentric shaft clamp according to claim 1, wherein: the limiting rod (18) parallel to the threaded rod (13) is fixedly connected in the sliding groove (12), a limiting hole (19) for the limiting rod (18) to penetrate is formed in the mounting block (3), and the inner side wall of the limiting hole (19) is attached to the side wall of the limiting rod (18).

7. The eccentric shaft clamp according to claim 1, wherein: one end of the threaded rod (13) close to the hand crank (14) is provided with a slot (15) with a polygonal cross section, and the hand crank (14) is fixedly connected with an insert block (16) inserted into the slot (15).

8. The eccentric shaft clamp according to claim 2, wherein: one end of the support rod (7) close to the workpiece is provided with an arc-shaped clamping piece (8).