CN111590356B

CN111590356B - Workpiece downward-suspension preventing mechanism with stable clamping force for clamp

Info

Publication number: CN111590356B
Application number: CN202010538780.0A
Authority: CN
Inventors: 徐小玉
Original assignee: Xinchang Shili Mechanical Equipment Factory
Current assignee: Longchuang Jinggong Nantong Co ltd
Priority date: 2020-06-13
Filing date: 2020-06-13
Publication date: 2021-05-11
Anticipated expiration: 2040-06-13
Also published as: CN111590356A

Abstract

The invention discloses a workpiece downward-hanging prevention mechanism with stable clamping force for a clamp, which comprises an adjusting mechanism, a positioning plate, a connecting sliding groove, a positioning hole, a limiting mechanism, a mounting seat, a connecting cylinder, a fixed motor, a motor groove, a threaded hole and a sliding block, wherein the mounting seat is connected to the upper end face of the adjusting mechanism in a threaded sliding and clamping mode, the adjusting mechanism comprises a positioning seat, a connecting screw rod, a connecting belt, a connecting gear, a fixed motor, a limiting groove, a supporting plate, a supporting groove and a connecting hole, and the upper end face of the supporting plate is symmetrically provided with supporting grooves for limiting. According to the invention, the adjusting mechanism and the limiting mechanism are arranged, the limiting mechanism can rapidly limit workpieces with different radiuses through contraction and expansion, the stability and adaptability of subsequent limiting are improved, meanwhile, the adjusting mechanism can rapidly position and withdraw workpieces with different lengths, and the adaptability of the device to various workpieces for preventing downward suspension is effectively improved.

Description

Workpiece downward-suspension preventing mechanism with stable clamping force for clamp

Technical Field

The invention relates to the technical field of machining equipment, in particular to a workpiece downward-hanging prevention mechanism with stable clamping force for a clamp.

Background

Along with the development of science and technology, the field of machining is more and more mature, the clamp is an indispensable device in the machining process, the clamp can be used for fixing a workpiece to be machined, so that the subsequent workpiece can be conveniently machined quickly and efficiently, but when the clamp is used for machining a cylindrical workpiece at present, as the general size of the cylindrical workpiece is longer and the weight is larger, and meanwhile, when the workpiece is far away from a machining end, the lower suspension of the workpiece is more serious, so that the subsequent machining precision of the workpiece is reduced,

as patent numbers: CN201810945639.5 discloses a machining fixture with stable clamping force, which comprises: base, first plate body, second plate body, swivel ring, two first anchor clamps bodies, two second anchor clamps bodies and advancing device, first plate body and second plate body are all established on the base, be equipped with the via hole on the first plate body, the swivel ring is established at the via hole, the via hole internal surface is equipped with the dovetail, and the lateral surface of swivel ring is equipped with the slider of matching, though this patent can extrude the location through first screw thread push rod and ejector pad to the rear portion of the work piece of processing, but because this work piece of processing is overweight, even if its extrusion still can lead to the work piece to take place the skew, cause the reduction of follow-up machining efficiency, so the urgent need a work piece for anchor clamps with stable clamping-force prevents hanging down the mechanism and solve above-mentioned problem that exists.

Disclosure of Invention

The present invention is directed to a workpiece anti-sagging mechanism for a clamp having a stable clamping force, so as to solve the problems of the background art.

In order to achieve the purpose, the invention provides the following technical scheme: a workpiece anti-underslung mechanism with stable clamping force for a clamp comprises an adjusting mechanism, a positioning plate, a connecting sliding groove, a positioning hole, a limiting mechanism, a mounting seat, a connecting cylinder, a connecting motor, a motor groove, a threaded hole and a sliding block,

the adjusting mechanism comprises a positioning seat, a connecting screw rod, a connecting belt, a connecting gear, a fixing motor, a limiting groove, a supporting plate, a supporting groove and a connecting hole, wherein the upper end face of the supporting plate is in threaded sliding clamping connection with an installation seat, the upper end face of the supporting plate is symmetrically provided with the supporting groove for limiting, the front end face of the supporting plate is provided with the limiting groove, the fixing motor is fixedly clamped and connected on the inner end face of the limiting groove, the front end face of the fixing motor is fixedly connected with the connecting gear, the fixing motor is in meshing rotation connection with the connecting belt through the connecting gear, the front end face of the connecting gear is fixedly connected with the connecting screw rod, the side end face of the supporting plate is fixedly connected with the positioning seat, the outer,

the bottom end face of the mounting seat is symmetrically and fixedly connected with sliding blocks for limiting, threaded holes for connection are symmetrically formed in the outer end face of the mounting seat close to the bottom, a connecting cylinder for supporting is fixedly connected to the inner end face of the mounting seat, a motor groove is formed in the center of the rear end face of the connecting cylinder, a connecting motor is fixedly connected to the inner end face of the motor groove, a limiting mechanism is fixedly clamped on the inner end face of the connecting cylinder through a positioning plate, the limiting mechanism is fixedly connected with the connecting motor, a positioning hole is formed in the center of the outer end face of the positioning plate, three groups of connecting sliding grooves are uniformly and equidistantly formed in the outer end face of the positioning plate, when the positioning seat is used, an external workpiece clamp can be installed on the positioning seat by a user, the subsequent workpiece can be conveniently and rapidly clamped, and therefore the workpiece can be, the stability of follow-up processing is improved, and the user can be according to the demand simultaneously, installs suitable backing plate or anchor clamps by oneself in the lower part of supporting seat, and it is convenient follow-up carry on spacingly to the afterbody of work piece, can install safeguard measures such as rubber sleeve simultaneously bottom backing plate or anchor clamps to the improvement is to the protectiveness of work piece.

Preferably, the limiting mechanism comprises a fixed clamping groove, a turnover plate, a fixed plate, a connecting clamping plate, a supporting seat, a fixed support plate, a fixed sleeve plate, a connector, a supporting shaft and a threaded clamping shaft, wherein the end of the front end face of the supporting shaft is provided with the fixed clamping groove, the threaded clamping shaft is rotatably clamped on the inner end face of the fixed clamping groove, the connector is provided with two groups, one group of the connector is fixedly clamped at one end of the supporting shaft, which is far away from the fixed clamping groove, the other group of the connector is in threaded connection with the outer end face of the threaded clamping shaft, the outer end face of the connector is uniformly and equidistantly rotatably connected with three groups of the turnover plate and the fixed sleeve plate which are arranged in a cross shape, the turnover plate is rotatably connected with the fixed sleeve plate through the turnover plate and the fixed sleeve plate, and the upper end face of the fixed support plate, and the side end face of the fixed plate is fixedly connected with the connecting clamping plate, the fixed plate is fixedly connected with the supporting seat through the connecting clamping plate, when the workpiece is prevented from being hung downwards, the rotation energy of the threaded clamping shaft drives the connector to displace, and further the relative position of the turnover plate and the fixed sleeve plate is lengthened, so that the supporting seat displaces towards the lower part, the stability of subsequently clamping the workpiece is improved, and the subsequent operation is facilitated.

Preferably, the connector is including the spacing head that is used for the threaded sleeve of support and even equidistance fixed connection at the outer terminal surface of threaded sleeve, spacing head and returning face plate with fixed lagging rotate the joint, the pivot groove has been seted up to the bottom face symmetry of fixed extension board, just the pivot groove with the returning face plate with fixed lagging rotates the joint, and spacing head can make things convenient for follow-up carry out quick location and connection to returning face plate and fixed lagging, improves follow-up spacing stability of carrying on.

Preferably, the screw thread trip shaft is including the screw thread axle and the spacing dish of fixed connection terminal surface before the screw thread axle that is used for spacing baffle, fixed connection terminal surface center department before the baffle, spacing dish and fixed slot looks adaptation, just the screw thread trip shaft rotates the joint inside fixed slot through spacing dish, and convenient follow-up user drives the connector through the screw thread trip shaft and carries out the displacement, has improved the follow-up convenience of adjusting.

Preferably, threaded sleeve and screw shaft looks adaptation, just the connector passes through threaded sleeve screw thread sliding connection at the outer terminal surface of screw thread card axle, and convenient follow-up drive connector carries out linear displacement on screw thread card axle upper portion.

Preferably, the rear end face center of the supporting shaft is fixedly connected with a clamping head, the clamping head is matched and fixedly connected with the positioning hole, the supporting seat comprises an installation clamping seat for supporting and clamping blocks which are symmetrically and fixedly connected to the front end face of the installation clamping seat, and the clamping head can conveniently and subsequently perform rapid positioning and connection on the limiting mechanism and the positioning plate.

Preferably, the clamping block is matched with the connecting sliding groove, the supporting seat is matched with the connecting sliding groove through the clamping block and is in sliding clamping connection with the positioning plate, and the stability of the supporting seat for clamping a workpiece in the outer end face displacement of the positioning plate can be effectively improved through the combination of the clamping block and the connecting sliding groove.

Preferably, the connecting hole rotates the joint with the connecting screw rod, just connecting screw rod and screw hole looks adaptation, just the mount pad is through connecting screw rod and screw hole looks adaptation threaded connection at the outer terminal surface of connecting screw rod, and convenient follow-up is spacing to the connecting hole to convenient follow-up carries out quick location and connection to connecting screw rod.

Preferably, the cross sections of the supporting groove and the sliding block are arranged in a T shape, and the mounting seat is connected to the inner end face of the supporting groove in a sliding and clamping mode through the sliding block, so that the stability of subsequent limiting displacement of the mounting seat can be effectively improved.

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

1. when the workpiece positioning device is used, a user can install an external workpiece clamp on the positioning seat, so that the workpiece can be conveniently and rapidly clamped in the follow-up process, the workpiece can be conveniently processed, the stability of the follow-up process is improved, meanwhile, the user can automatically install a proper backing plate or clamp on the lower part of the supporting seat according to the requirement, the tail part of the workpiece can be conveniently limited in the follow-up process, meanwhile, protective measures such as a rubber sleeve and the like can be installed at the bottom of the backing plate or the clamp, the protection performance of the workpiece is improved, and the efficiency of processing the workpiece in the follow-up process is further improved.

2. When the tail end of a workpiece is positioned and prevented from being suspended downwards, the supporting seat in the limiting mechanism is at the maximum opening height in a normal state, so that the workpiece can be conveniently and subsequently adapted to workpieces with different radiuses to be prevented from being suspended downwards, when the tail part of the workpiece is positioned, the connecting screw rod can drive the mounting seat to move towards the front part, the workpiece just falls between the three limiting mechanisms until the workpiece is contacted with the outside of the mounting seat, and concretely as shown in the figure, a user can start the connecting motor through the external control mechanism, the connecting motor can drive the threaded clamping shaft to rotate, the threaded clamping shaft can drive the connecting head to move outwards while rotating, and when the connecting head moves outwards, the fixed sleeve plate and the turnover plate can be driven to be pressed towards the lower part, so that the height of the fixed plate is reduced, and meanwhile, the three groups of supporting seats can move centripetally until the workpiece is clamped together, the operation of preventing the workpiece from being suspended is completed, and the subsequent efficiency of processing the workpiece is improved.

3. According to the invention, the adjusting mechanism and the limiting mechanism are arranged, the limiting mechanism can rapidly limit workpieces with different radiuses through contraction and expansion, the stability and adaptability of subsequent limiting are improved, meanwhile, the adjusting mechanism can rapidly position and withdraw workpieces with different lengths, and the adaptability of the device to various workpieces for preventing downward suspension is effectively improved.

Drawings

FIG. 1 is an exploded view of a body of the present invention;

FIG. 2 is an assembled view of the body of the present invention;

FIG. 3 is a front view of the body of the present invention;

FIG. 4 is a cross-sectional view of the present invention taken along the front view A-A of the body;

FIG. 5 is a partial enlarged view of the main body I of the present invention;

FIG. 6 is an exploded view of the adjustment mechanism of the present invention;

FIG. 7 is an assembly view of the adjustment mechanism of the present invention;

FIG. 8 is an exploded view of the spacing mechanism of the present invention;

figure 9 is an exploded side view of the spacing mechanism of the present invention;

fig. 10 is an assembly view of the spacing mechanism of the present invention.

In the figure: 1-adjusting mechanism, 2-positioning plate, 3-connecting sliding groove, 4-positioning hole, 5-limiting mechanism, 6-mounting seat, 7-connecting cylinder, 8-connecting motor, 9-motor groove, 10-threaded hole, 11-sliding block, 101-positioning seat, 102-connecting screw rod, 103-connecting belt, 104-connecting gear, 105-fixing motor, 106-limiting groove, 107-supporting plate, 108-supporting groove, 109-connecting hole, 501-fixing clamping groove, 502-turnover plate, 503-fixing plate, 504-connecting clamping plate, 505-supporting seat, 506-fixing supporting plate, 507-fixing sleeve plate, 508-connecting head, 509-supporting shaft and 510-threaded clamping shaft.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely 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 of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-10, an embodiment of the present invention is shown: a workpiece downward-suspension preventing mechanism with stable clamping force for a clamp comprises an adjusting mechanism 1, a positioning plate 2, a connecting sliding groove 3, a positioning hole 4, a limiting mechanism 5, a mounting seat 6, a connecting cylinder 7, a connecting motor 8, a motor groove 9, a threaded hole 10 and a sliding block 11,

the adjusting mechanism 1 comprises a positioning seat 101, a connecting screw rod 102, a connecting belt 103, a connecting gear 104, a fixing motor 105, a limiting groove 106, a supporting plate 107, a supporting groove 108 and a connecting hole 109, wherein the upper end surface of the supporting plate 107 is in threaded sliding clamping connection with the mounting seat 6, the upper end surface of the supporting plate 107 is symmetrically provided with the supporting groove 108 for limiting, the front end surface of the supporting plate 107 is provided with the limiting groove 106, the inner end surface of the limiting groove 106 is fixedly clamped with the fixing motor 105, the front end surface of the fixing motor 105 is fixedly connected with the connecting gear 104, the fixing motor 105 is in meshing rotation connection with the connecting belt 103 through the connecting gear 104, the front end surface of the connecting gear 104 is fixedly connected with the connecting screw rod 102, the side end surface of the supporting plate 107 is fixedly connected with the,

the bottom end face of the mounting seat 6 is symmetrically and fixedly connected with sliding blocks 11 for limiting, threaded holes 10 for connection are symmetrically formed in the outer end face of the mounting seat 6 close to the bottom, a connecting cylinder 7 for supporting is fixedly connected to the inner end face of the mounting seat 6, a motor groove 9 is formed in the center of the rear end face of the connecting cylinder 7, a connecting motor 8 is fixedly connected to the inner end face of the motor groove 9, the inner end face of the connecting cylinder 7 is fixedly clamped with a limiting mechanism 5 through a positioning plate 2, the limiting mechanism 5 is fixedly connected with the connecting motor 8, a positioning hole 4 is formed in the center of the outer end face of the positioning plate 2, three groups of connecting sliding grooves 3 are uniformly and equidistantly formed in the outer end face of the positioning plate 2, when the positioning seat is used, a user can install an external workpiece clamp on the positioning seat 101, and can conveniently and quickly clamp a workpiece, the stability of follow-up processing is improved, and the user can be according to the demand simultaneously, installs suitable backing plate or anchor clamps by oneself in the lower part of supporting seat 505, and it is convenient follow-up carry on spacingly to the afterbody of work piece, can install safeguard measures such as rubber sleeve simultaneously in backing plate or anchor clamps bottom to the improvement is to the protectiveness of work piece.

The limiting mechanism 5 comprises a fixed clamping groove 501, a turnover plate 502, a fixed plate 503, a connecting clamping plate 504, a supporting seat 505, a fixed support plate 506, a fixed sleeve plate 507, a connecting head 508, a supporting shaft 509 and a threaded clamping shaft 510, wherein the fixed clamping groove 501 is arranged at the end of the front end face of the supporting shaft 509, the threaded clamping shaft 510 is rotatably clamped on the inner end face of the fixed clamping groove 501, two groups of connecting heads 508 are arranged, one group of connecting heads 508 are fixedly clamped at one end of the supporting shaft 509, which is far away from the fixed clamping groove 501, the other group of connecting heads 508 are in threaded connection with the outer end face of the threaded clamping shaft 510, the outer end face of each connecting head 508 is uniformly and equidistantly rotatably connected with three groups of turnover plates 502 and fixed sleeve plates 507 which are arranged in a crossed manner, the turnover plates 502 are rotatably connected with the fixed sleeve plates 507 through the turnover plates 502 and the fixed sleeve plates 507, and the side end face of the fixed plate 503 is fixedly connected with a connecting clamping plate 504, the fixed plate 503 is fixedly connected with a supporting seat 505 through the connecting clamping plate 504, when the workpiece is subjected to the downward suspension prevention operation, the rotation energy of the threaded clamping shaft 510 drives the connecting head 508 to displace, so that the relative position of the turnover plate 502 and the fixed sleeve plate 507 is lengthened, the supporting seat 505 is displaced downwards, the stability of subsequently clamping the workpiece is improved, and the subsequent operation is facilitated.

Connector 508 is including the spacing head that is used for the threaded sleeve of support and even equidistance fixed connection at the outer terminal surface of threaded sleeve, spacing head and returning face plate 502 and fixed sleeve plate 507 rotate the joint, the pivot groove has been seted up to the bottom face symmetry of fixed extension board 506, and pivot groove and returning face plate 502 and fixed sleeve plate 507 rotate the joint, spacing head can make things convenient for follow-up carry out quick location and connection to returning face plate 502 and fixed sleeve plate 507, improve follow-up spacing stability of carrying on.

The screw thread card axle 510 is including being used for spacing baffle, the screw thread axle of fixed connection terminal surface center department before the baffle and the spacing dish of fixed connection terminal surface before the screw thread axle, spacing dish and fixed slot 501 looks adaptation, and screw thread card axle 510 rotates the joint inside fixed slot 501 through spacing dish, makes things convenient for follow-up user to drive connector 508 through screw thread card axle 510 and carries out the displacement, has improved the follow-up convenience of adjusting.

The threaded sleeve is matched with the threaded shaft, and the connector 508 is slidably connected to the outer end face of the threaded clamping shaft 510 through threads of the threaded sleeve, so that the connector 508 is conveniently driven to perform linear displacement on the upper portion of the threaded clamping shaft 510 subsequently.

Back shaft 509's rear end face center department fixedly connected with joint, and joint and 4 looks adaptations fixed connection of locating hole, supporting seat 505 is including the installation cassette that is used for the support and the fixture block of symmetry fixed connection terminal surface before the installation cassette, and the joint can make things convenient for follow-up carry out quick location and be connected to stop gear 5 and locating plate 2.

The fixture block is matched with the connecting chute 3, the supporting seat 505 is in sliding clamping connection with the positioning plate 2 through the fixture block and the connecting chute 3, and the stability of the supporting seat 505 for clamping a workpiece by displacing the outer end face of the positioning plate 2 can be effectively improved through the combination of the fixture block and the connecting chute 3.

The connecting hole 109 and the connecting screw rod 102 are rotationally clamped, the connecting screw rod 102 is matched with the threaded hole 10, the mounting seat 6 is in threaded connection with the outer end face of the connecting screw rod 102 through the matching of the connecting screw rod 102 and the threaded hole 10, the connecting hole 109 is convenient to carry out limiting subsequently, and therefore the connecting screw rod 102 can be conveniently and rapidly positioned and connected subsequently.

The cross section of supporting groove 108 and slider 11 is the T setting that appears, and mount pad 6 passes through slider 11 slip joint at the inner terminal surface that supports groove 108, can effectively improve follow-up stability of carrying out spacing displacement to mount pad 6.

The working principle is as follows: when in use, as shown in fig. 1 and fig. 2, a user can install an external workpiece fixture on the positioning seat 101 to facilitate subsequent rapid clamping of a workpiece, thereby facilitating processing of the workpiece, improving the stability of subsequent processing, and at the same time, the user can install a proper backing plate or fixture on the lower portion of the supporting seat 505 by himself/herself as required to facilitate subsequent limiting of the tail of the workpiece, and at the same time, can install protective measures such as a rubber sleeve on the bottom of the backing plate or fixture to improve the protection of the workpiece,

after the workpiece is clamped, as shown in fig. 6 and 7, at this time, the external clamping mechanism can clamp one end of the workpiece, but the other end of the workpiece is easy to incline due to the heavy workpiece, at this time, a user can start the fixed motor 105 through the external control mechanism, the fixed motor 105 can drive the two groups of connecting gears 104 to rotate together through the connecting belt 103, and further drive the connecting screw rod 102 located at the front part of the connecting gear 104 to rotate, and when the connecting screw rod 102 rotates, the mounting base 6 can be driven to move towards the front part, so that the tail part of the workpiece can be conveniently and rapidly positioned and supported subsequently,

when positioning and preventing the tail end of the workpiece from being suspended, as shown in fig. 4, 5, 8 and 9, the supporting seat 505 inside the limiting mechanism 5 is at the maximum height of opening in the normal state, so as to be convenient for the subsequent adaptation to workpieces with different radiuses to prevent the workpiece from being suspended, when positioning the tail end of the workpiece, the connecting screw rod 102 can drive the mounting seat 6 to move forward, at this time, the workpiece just falls between the three sets of limiting mechanisms 5 until the workpiece contacts with the outside of the mounting seat 6, as shown in fig. 5, then the user can start the connecting motor 8 through the external control mechanism, the connecting motor 8 can drive the threaded clamping shaft 510 to rotate, the threaded clamping shaft 510 can drive the connecting head 508 to move outward while rotating, when the connecting head 508 moves outward, the fixed sleeve plate 507 and the turnover plate 502 can be driven to press-fit to the lower part, so as to reduce the height of the fixed plate 503, meanwhile, the three groups of supporting seats 505 move centripetally until clamping of the workpiece is completed together, the workpiece is prevented from being suspended, and the subsequent workpiece processing efficiency is improved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a workpiece underslung prevention mechanism for anchor clamps with stabilize clamping-force which characterized in that: comprises an adjusting mechanism (1), a positioning plate (2), a connecting sliding chute (3), a positioning hole (4), a limiting mechanism (5), a mounting seat (6), a connecting cylinder (7), a connecting motor (8), a motor groove (9), a threaded hole (10) and a sliding block (11),

the adjusting mechanism (1) comprises a positioning seat (101), a connecting screw rod (102), a connecting belt (103), a connecting gear (104), a fixed motor (105), a limiting groove (106), a supporting plate (107), a supporting groove (108) and a connecting hole (109), the upper end face of the supporting plate (107) is in threaded sliding clamping connection with the mounting seat (6), the upper end face of the supporting plate (107) is symmetrically provided with the supporting groove (108) for limiting, the front end face of the supporting plate (107) is provided with the limiting groove (106), the fixed motor (105) is fixedly clamped on the inner end face of the limiting groove (106), the front end face of the fixed motor (105) is fixedly connected with the connecting gear (104), the fixed motor (105) is connected with the connecting belt (103) in a meshing rotation manner through the connecting gear (104), and the front end face of the connecting gear (104) is fixedly connected with the connecting screw rod (102), a positioning seat (101) is fixedly connected with the side end face of the supporting plate (107), connecting holes (109) are symmetrically formed in the outer end face of the positioning seat (101),

the bottom end surface of the mounting seat (6) is symmetrically and fixedly connected with sliding blocks (11) for limiting, and the outer end surface of the mounting seat (6) is symmetrically provided with threaded holes (10) for connection near the bottom, the inner end surface of the mounting seat (6) is fixedly connected with a connecting cylinder (7) for supporting, a motor groove (9) is arranged at the center of the rear end face of the connecting cylinder (7), the inner end surface of the motor groove (9) is fixedly connected with a connecting motor (8), the inner end surface of the connecting cylinder (7) is fixedly clamped with a limiting mechanism (5) through a positioning plate (2), and the limiting mechanism (5) is fixedly connected with the connecting motor (8), a positioning hole (4) is arranged at the center of the outer end surface of the positioning plate (2), three groups of connecting sliding chutes (3) are uniformly arranged on the outer end surface of the positioning plate (2) at equal intervals;

the limiting mechanism (5) comprises a fixed clamping groove (501), a turnover plate (502), a fixed plate (503), a connecting clamping plate (504), a supporting seat (505), a fixed support plate (506), a fixed sleeve plate (507), a connector (508), a supporting shaft (509) and a threaded clamping shaft (510), wherein the fixed clamping groove (501) is formed in the end head of the front end face of the supporting shaft (509), the threaded clamping shaft (510) is rotatably clamped on the inner end face of the fixed clamping groove (501), the connector (508) is provided with two groups, one group of connector (508) is fixedly clamped at one end of the supporting shaft (509) deviating from the fixed clamping groove (501), the other group of connector (508) is in threaded connection with the outer end face of the threaded clamping shaft (510), and the outer end face of the connector (508) is uniformly and equidistantly rotatably connected with the three groups of the turnover plate (502) and the fixed sleeve plate (507) which are arranged, the turnover plate (502) is rotatably connected with the fixed sleeve plate (507), the connector (508) is rotatably connected with the fixed support plate (506) through the turnover plate (502) and the fixed sleeve plate (507), the upper end face of the fixed support plate (506) is fixedly connected with a fixed plate (503) and is located on the side end face of the fixed plate (503) is fixedly connected with a connecting clamping plate (504), and the fixed plate (503) is fixedly connected with a supporting seat (505) through the connecting clamping plate (504).

2. The workpiece anti-underslung mechanism for a clamping apparatus with stable clamping force of claim 1, wherein: connector (508) including the screw sleeve that is used for supporting and the spacing head of even equidistance fixed connection at the outer terminal surface of screw sleeve, spacing head and returning face plate (502) with fixed lagging (507) rotate the joint, the pivot groove has been seted up to the bottom face symmetry of fixed extension board (506), just the pivot groove with returning face plate (502) with fixed lagging (507) rotate the joint.

3. The workpiece anti-underslung mechanism for a clamping apparatus with stable clamping force of claim 2, wherein: screw thread card axle (510) are including being used for spacing baffle, the screw thread axle of terminal surface center department and the spacing dish of fixed connection terminal surface before the screw thread axle before the baffle, spacing dish and fixed slot (501) looks adaptation, just screw thread card axle (510) rotate the joint through spacing dish inside fixed slot (501).

4. The workpiece anti-underslung mechanism for a clamping apparatus with a stable clamping force as set forth in claim 3, wherein: the threaded sleeve is matched with the threaded shaft, and the connector (508) is in threaded sliding connection with the outer end face of the threaded clamping shaft (510) through the threaded sleeve.

5. The workpiece anti-underslung mechanism for a clamping apparatus with stable clamping force of claim 1, wherein: the supporting seat comprises a supporting shaft (509), a clamping head is fixedly connected to the center of the rear end face of the supporting shaft, the clamping head is matched and fixedly connected with the positioning hole (4), and the supporting seat (505) comprises an installation clamping seat for supporting and clamping blocks which are symmetrically and fixedly connected to the front end face of the installation clamping seat.

6. The workpiece anti-underslung mechanism for a clamping apparatus with stable clamping force of claim 5, wherein: the fixture block is matched with the connecting sliding groove (3), and the supporting seat (505) is in sliding clamping connection with the positioning plate (2) through the fixture block and the connecting sliding groove (3).

7. The workpiece anti-underslung mechanism for a clamping apparatus with stable clamping force of claim 1, wherein: the connecting hole (109) is rotationally clamped with the connecting screw rod (102), the connecting screw rod (102) is matched with the threaded hole (10), and the mounting seat (6) is in threaded connection with the outer end face of the connecting screw rod (102) through the matching of the connecting screw rod (102) and the threaded hole (10).

8. The workpiece anti-underslung mechanism for a clamping apparatus with stable clamping force of claim 7, wherein: the cross sections of the supporting groove (108) and the sliding block (11) are both in T-shaped arrangement, and the mounting seat (6) is connected to the inner end face of the supporting groove (108) in a sliding and clamping mode through the sliding block (11).