CN115816119A

CN115816119A - Anti-deformation clamp

Info

Publication number: CN115816119A
Application number: CN202211339725.4A
Authority: CN
Inventors: 郦鸿志
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-09
Filing date: 2020-11-09
Publication date: 2023-03-21
Also published as: CN112475965B; CN112475965A

Abstract

The invention discloses an anti-deformation clamp which comprises a plurality of chain plates and rotating pins, wherein the chain plates are in a long strip shape, the chain plates are sequentially hinged end to form a segment-shaped long strip, and the rotating pins are arranged at the connecting positions of adjacent chain plates. The chain plate comprises a plate body and a transmission shaft, the transmission shaft comprises a shaft body and an end gear, and the rotating pin comprises a pin head and a rotating gear; the plate body both ends are equipped with its length direction transmission hinge hole of perpendicular to, and the transmission hinge hole is the shoulder hole, and the transfer gear combines to form for two bevel gears back to back, and the both ends of transfer gear extend the round pin head axially respectively, and the round pin head rotates with the one end of two plate bodys next-door neighbour respectively to be connected, sets up the through-hole and passes the axis body that can rotate along its length direction in the plate body, and the end gear setting is connected with the meshing of transfer gear at the both ends of axis body.

Description

Anti-deformation clamp

Technical Field

The invention relates to the technical field of workpiece machining clamps, in particular to an anti-deformation clamp.

Background

The clamp is used for fixing a workpiece to be machined in industrial machining, and the quality of the workpiece machining quality is influenced by clamping precision and stability.

In the prior art, a lathe is generally clamped by a three-jaw or four-jaw chuck, the clamping points are limited, and for drilling, milling, grinding and other processing, the clamping is stable by some combined clamps, however, the existing clamps are generally only used for processing of workpieces with regular surfaces, for special-shaped curved surfaces, the clamps cannot be efficiently clamped, and are all used for clamping by generalized clamps, so that the problem caused by the limitation of the clamping points is solved, clamping force is exerted on a plurality of clamping points, the pressure of a single point is large, the workpieces are easy to deform, and for the curved surface workpieces, less clamping points also cause unstable clamping.

Disclosure of Invention

The invention aims to provide a deformation-preventing clamp to solve the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme:

the utility model provides an anti-deformation clamp, includes a plurality of chain boards and changes the round pin, and the chain board is rectangular shape, and the chain board articulates into the rectangular of a segmental form end to end in proper order, and adjacent chain board sets up at the junction and changes the round pin. The segment-shaped anti-deformation clamp wraps the workpiece from the outer edge of the workpiece, the workpiece is in contact with a plurality of points of the workpiece and is clamped, the pressure intensity of a single contact point is small, the workpiece is prevented from deforming at a clamping position, the chain-shaped clamp can adapt to various outer contours of the workpiece, and the universality is high.

Further, the chain plate comprises a plate body and a transmission shaft, the transmission shaft comprises a shaft body and an end gear, and the rotating pin comprises a pin head and a rotating gear;

the plate body both ends are equipped with its length direction transmission hinge hole of perpendicular to, and the transmission hinge hole is the shoulder hole, and the transfer gear combines to form for two bevel gears back to back, and the both ends of transfer gear extend the round pin head axially respectively, and the round pin head rotates with the one end of two plate bodys next-door neighbour respectively to be connected, sets up the through-hole and passes the axis body that can rotate along its length direction in the plate body, and the end gear setting is connected with the meshing of transfer gear at the both ends of axis body.

Further, the anti-deformation clamp further comprises a matching resistance assembly, a damping groove is formed in the plate body, the matching resistance assembly is located in the damping groove, and the matching resistance assembly applies rotation resistance with an opening threshold value on the shaft body. The rotation resistance of the shaft body can be prevented from rotating when the torque for overcoming the rotation resistance of the shaft body is lower than the threshold value, and after the torque exceeding the threshold value is input into the shaft body, the rotation resistance can be completely overcome, and when the shaft body continuously rotates in the rotation direction, the shaft body is not subjected to the rotation resistance any more.

Furthermore, the matched resistance assembly comprises a sliding block, a resisting spring and an elastic bulge structure, a threaded section is arranged on the shaft body, a through hole is formed in the center of the sliding block, an internal thread is formed in the through hole, the outer edge of the sliding block is of a non-circular outline, the sliding block slides in the damping groove, a damping bulge is arranged on the side face of the sliding block, the elastic bulge structure is arranged on the wall face of the damping groove, two ends of the sliding block are respectively resisted by the resisting spring, and the internal thread is matched with the thread of the threaded section. The slider and the shaft body form a screw-nut structure, the rotation of the shaft body can cause the slider to move along the damping groove, however, the movement of the slider can not be smoothly carried out, because the damping bulge is blocked by the elastic bulge structure, when the torque on the shaft body needs to be large enough, the slider can obtain the moving force for pushing the elastic bulge structure open, when the torque of the shaft body is enough, the slider pushes the elastic bulge structure open to reach the other side, the subsequent movement can be smoothly carried out, but in order to provide resistance quickly during reversal, the slider can not move too much, and the slider can move on two sides of the position of the elastic bulge structure, therefore, if the thread section is set to be longer, the slider can move more, when the next reverse shaft body rotates reversely, need drive the slider earlier to elastic bulge structure department just can provide the rotation resistance, at this in-process, the chain board of this festival can not take place to rotate and toward the work piece is attached, so, this application sets up the screw thread section shorter, the screw thread section only enough lets the slider move to the opposite side from elastic bulge structure one side, in case cross the back, the screw thread connection of screw thread section and the slider inner circle breaks away from, the rotation of axis body no longer drives the slider and removes, and the effect of resisting the tight spring is when the axis body counter-rotation, let screw thread section and slider reentrant meshing state, the spring that resists of slider both sides sets up and provides the pretension with screw thread section perpendicular to axial plane of symmetry, slider is to what direction removes, just for it provides reverse thrust.

Further, the elastic bulge structure includes plug screw, pretightning force spring and bull's eye bearing, sets up the ladder mounting hole from the damping tank toward outer on the plate body lateral wall, and the position that is close to the plate body surface in the ladder mounting hole sets up the screw, and the bull's eye bearing sets up at the ladder mounting hole, and the bull's eye bearing stretches out the bearing ball towards the damping tank in, and the plug screw closes soon and compresses tightly the bull's eye bearing in the ladder mounting hole and through the pretightning force spring. The pretightening force spring compresses the bull's eye bearing in the ladder mounting hole, the bearing ball part of bull's eye bearing is as with the bellied contact point of damping, when the bellied straight line of damping needs to move and cross the bull's eye bearing, need push it open, that is to give a power that is greater than the pretightening force of pretightening force spring, the pretightening force of pretightening force spring can be controlled through the degree of depth of screwing in of plug screw, the deeper the plug screw is screwed in, the bigger the pretightening force spring is precompressed, the bellied bull's eye bearing that just is difficult to push open of damping, the opening threshold of axis body rotation resistance is also bigger.

Preferably, the thread of the thread section is a double-thread fine-thread. The double fine pitch thread provides excellent thread engagement while allowing for greater axial movement of the slide at smaller rotational angles.

Preferably, the chaining plate further comprises a clamping column, and the clamping column extends out of the side face of the plate body. The clamping column is used as a contact point of the chain plate and the workpiece, so that the action amplitude of each chain plate can be reduced. If the plate body is brought into contact with the workpiece, the plate body rotates a relatively large angle each time.

Preferably, the head of the clamping column is spherical. The spherical head is capable of having a clamping force with a large number of surfaces perpendicular to the surface.

Preferably, the end gear and the transfer gear are bevel gears. The helical gear transmits torque power stably and uniformly.

Compared with the prior art, the invention has the following beneficial effects: according to the invention, a chain section form takes a strip deformable component as a clamping piece, the shape of a curved surface workpiece is fitted, and the clamping force of a single point position is reduced by multi-point clamping; the power input only needs to input the rotating pin at the first section position, and after each section of rotating pin is in place, the power can be automatically transmitted backwards.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic diagram of the use configuration of the present invention;

FIG. 2 is a schematic end-to-end connection of chaining plates of the present invention;

FIG. 3 is a schematic front view of the chaining plate connection of the present invention;

FIG. 4 is a perspective view of the attachment location of the chaining plate of the present invention;

FIG. 5 is view A of FIG. 4;

FIG. 6 is a simplified schematic view of the chaining plate, pivot pin connection of the present invention;

FIG. 7 is a schematic representation of a resistive component of the present invention;

FIG. 8 is view B-B of FIG. 7;

FIG. 9 is a schematic perspective view of the present invention in position of the matched block assembly;

FIG. 10 is a schematic view of the connection of the head and tail sections of the chain plate of the present invention.

In the figure: the device comprises a 1-chain plate, an 11-plate body, a 111-transmission hinge hole, a 112-damping groove, a 12-clamping column, a 13-transmission shaft, a 131-shaft body, a 132-end gear, a 133-thread section, a 14-matched resistance component, a 141-sliding block, a 1411-damping protrusion, a 142-resisting spring, a 143-screw plug, a 144-pretightening force spring, a 145-bull eye bearing, a 2-rotating pin, a 21-pin head, a 22-intermediate rotating gear, a 3-round cap and a 4-fastening nail.

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 obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

As shown in fig. 1 and 2, the anti-deformation clamp for processing the curved surface special-shaped workpiece comprises a plurality of chain plates 1 and rotating pins 2, wherein the chain plates 1 are strip-shaped, the chain plates 1 are sequentially hinged end to form a segment-shaped strip, and the rotating pins 2 are arranged at the joints of the adjacent chain plates 1. As shown in figure 1, the segment-shaped anti-deformation clamp wraps a workpiece from the outer edge of the workpiece, contacts and clamps a plurality of points of the workpiece, the pressure of a single contact point is low, the workpiece is prevented from deforming at a clamping position, and the chain-shaped clamp can adapt to various outer contours of the workpiece and has strong universality.

As shown in fig. 2~6, chaining plate 1 comprises plate body 11 and transmission shaft 13, transmission shaft 13 comprises shaft body 131 and end gear 132, rotation pin 2 comprises pin head 21 and middle gear 22;

11 both ends of plate body are equipped with its length direction transmission hinge hole 111 of perpendicular to, transmission hinge hole 111 is the shoulder hole, transfer gear 22 combines for two bevel gears back to form, the both ends of transfer gear 22 extend the round pin head 21 axially respectively, round pin head 21 rotates with two plate bodies 11 on the one end of close-proximity respectively and is connected, set up the through-hole along its length direction in the plate body 11 and pass can pivoted axis body 131, end gear 132 sets up the both ends at axis body 131, end gear 132 is connected with transfer gear 22 meshing.

As shown in fig. 6, in this section, for the convenience of distinguishing adjacent chain plates, the left chain plate in fig. 6 is labeled as 1a, its belonging component is labeled as a suffix a in this section, and so on, the middle chain plate is labeled as 1b, its belonging component is labeled as a suffix b in this section, the left rotating pin 2 is labeled as a suffix a, and its belonging component is also labeled as a suffix a, the transmission shaft 13 can transmit clamping force piece by piece, when the leftmost shaft body 131a rotates, it can transmit rotation to the rotating pin 2a, the transmission shaft 131b of the middle chain plate 1b is provided with a certain rotation resistance, that is, the intermediate rotating gear 22a and the end gear 132b cannot rotate relatively, the rotation of the end gear 132a drives the pin head 21a, the transfer gear 22a, and the entire chain plate 1b to rotate around the axis of the pin head 21a, referring to fig. 1 again, after the first chain plate 1 is in place, the second chain plate can rotate around the hinge point through the transmission shaft therein until the second chain plate is attached to the workpiece, and then returning to fig. 6 for analysis, the chain plate 1b cannot rotate around the pin head 21a, so that the rotation force of the shaft body 131a is all used to drive the rotation of the shaft body 131b until the shaft body 131b overcomes the rotation resistance and then rotates, after the rotation of the shaft body 131b, the rotation pin 2b drives the third chain plate 1c to rotate around the pin head 21b, and after the third chain plate 1c is also attached to the workpiece, the shaft body 131b is forced to rotate and then transmits the power to the rear.

The rotational power transmission among the sections discussed above is slightly different between the first section chain plate and the last section chain plate, as shown in fig. 9, the input end of the first section chain plate is hinged with the head end of the chain plate by a round cap 3, the round cap 3 is a circular column, the round cap 3 connected with the first section chain plate is fixed with a base set by an operator, and the head of the rotating pin 2 is extended out to be used as power input; the last section chaining plate is that round cap 3 passes through fastening nail 4 with the chaining plate to be fixed, and commentaries on classics round pin 2 passes through fastening nail 4 with round cap 3 to be fixed, also can directly jump round cap 3 and let commentaries on classics round pin 2 and chaining plate body fixed, but can expose the transfer gear of rearmost like this, damage the gear easily and influence subsequent length and add.

As shown in fig. 6~9, the anti-deformation clamp further includes a resistance matching assembly 14, a damping groove 112 is disposed in the plate body 11, the resistance matching assembly 14 is located in the damping groove 112, and the resistance matching assembly 14 applies a rotation resistance with an opening threshold on the shaft body 131. The rotation resistance with the opening threshold is that when the torque for overcoming the rotation resistance of the shaft body 131 is lower than the threshold, the shaft body 131 cannot rotate, and after the torque exceeding the threshold is input to the shaft body 131, the rotation resistance can be completely overcome, and when the shaft body 131 continuously rotates in the rotation direction, the shaft body 131 does not receive the rotation resistance any more, the rotation resistance is set, so that the chain plate 1 of each section can be rotationally attached to the surface of a workpiece and then transmits the power to the next stage without damage, in each section of chain plate, the rotation resistance of the shaft body 131 can not freely rotate at the beginning, the power transmitted by the shaft body in the previous section of chain plate can drive the section of chain plate to rotate around a hinge point and attach to the workpiece, after the section of chain plate is attached to the workpiece, the power input of the previous section of shaft body can not drive the section of chain plate to rotate any more, the rotation resistance can only be transmitted to the shaft body of the section of shaft body to overcome the rotation resistance, and after the threshold is exceeded, the torque of the previous section of shaft body is equivalently transmitted to the next section of shaft.

As shown in fig. 7~9, the resistance matching component 14 includes a slider 141, a tightening spring 142 and an elastic protrusion structure, a threaded section 133 is disposed on the shaft 131, a through hole is disposed in the center of the slider 141 and an internal thread is disposed in the through hole, the outer edge of the slider 141 is a non-circular contour, the slider 141 slides in the damping groove 112, a damping protrusion 1411 is disposed on the side surface of the slider 141, an elastic protrusion structure is disposed on the wall surface of the damping groove 112, two ends of the slider 141 are respectively tightened by the tightening spring 142, and the internal thread is matched with the thread of the threaded section 133. The slider 141 and the shaft body 131 are screw-nut structures, the rotation of the shaft body 131 can drive the slider 141 to move along the damping groove 112, however, the movement of the slider 141 cannot be smoothly performed, because the damping protrusion 1411 is blocked by the elastic protrusion structure, when the torque on the shaft body 131 needs to be large enough, the slider 141 can obtain the moving force for pushing the elastic protrusion structure, when the torque on the shaft body 131 is sufficient, the slider 141 pushes the elastic protrusion structure to reach the other side, the subsequent movement can be smoothly performed, but in order to provide resistance quickly during reverse rotation, the slider 141 cannot move too much, and should move on both sides of the elastic protrusion structure, therefore, if the threaded section 133 is set to be long and the slider 141 moves more, when the next reverse shaft body rotates reversely, the slider 141 needs to be driven to the elastic protrusion structure to provide rotational resistance, during this process, the threaded plate of the section does not rotate to adhere to the workpiece, therefore, the threaded section 133 is set to be short, the slider 141 can only move from one side of the elastic protrusion structure to the other side, once the slider 141 moves to the other side, the slider 141 and once the slider 141 moves to the threaded section is connected to the slider 141, the slider 141 and the slider 141 is set to provide a thrust force for pushing the slider 141 to rotate symmetrically, the slider 141, and the slider 141 is set to push the slider 141.

As shown in fig. 8, the elastic protrusion structure includes a screw plug 143, a preload spring 144, and a bull's eye bearing 145, a stepped mounting hole is provided on the side wall of the plate body 11 from the damping groove 112 to the outside, a thread is provided in the stepped mounting hole at a position close to the outer surface of the plate body 11, the bull's eye bearing 145 is provided in the stepped mounting hole, the bull's eye bearing 145 extends out of a bearing ball toward the damping groove 112, and the screw plug 143 is screwed in the stepped mounting hole and compresses the bull's eye bearing 145 through the preload spring 144. The pretightening force spring 144 presses the bull's eye bearing 145 in the stepped mounting hole, a bearing ball part of the bull's eye bearing 145 serves as a contact point with the damping protrusion 1411, when the damping protrusion 1411 needs to move linearly and pass over the bull's eye bearing 145, the damping protrusion needs to be pushed open, namely, a force larger than the pretightening force of the pretightening force spring 144 is required, the pretightening force of the pretightening force spring 144 can be controlled through the screwing depth of the screw plug 143, the deeper the screw plug 143 is screwed, the larger the precompressed pretightening force spring 144 is, the larger the damping protrusion 1411 is difficult to push open the bull's eye bearing 145, and the larger the opening threshold of the rotation resistance of the shaft body 131 is.

The threaded section 133 threads are double fine pitch threads. The double fine thread provides excellent thread engagement performance while achieving a large axial movement of the slider 141 at a small rotation angle.

As shown in fig. 1 and 2, the chaining plate 1 further comprises a clamping post 12, the clamping post 12 protruding from the side of the plate body 11. The clamping columns 12 serve as contact points of the chain plates 1 with the workpiece, and the action amplitude of each chain plate 1 can be reduced. If the plate body 11 is brought into contact with the workpiece, the rotation angle of the plate body 11 is large each time.

The head of the clamping column 12 is spherical. The spherical head is capable of having a clamping force with a large number of surfaces perpendicular to the surface.

The end gear 132 and the counter gear 22 are bevel gears. The helical gear transmits torque power stably and uniformly.

The working principle of the invention is as follows: the head of a first section of chain plate 1 is fixed as the starting point of a clamp, clamping power is loaded on a rotating pin 2, the input torque is not enough to push open the rotation resistance on the shaft body in the first section of chain plate, the first section of chain plate rotates and is attached to a workpiece in advance, the first section of chain plate cannot rotate again due to continuous input of the clamping power, the opening threshold of the rotation resistance on the shaft body in the first section of chain plate is gradually increased, after an elastic bulge structure is pushed open, the rotation power can be transmitted to the next section without damage, the section of chain plate is driven to rotate and attach to the workpiece in advance during each transmission, then the rotation resistance for pushing open the section is transmitted backwards, the shaft body does not rotate any more at the position of a last section of chain plate, only the chain plate body rotates and attaches to the workpiece, finally, the input torque is kept at a constant value, and the clamp distributes the torque to clamping force on a plurality of contact points to clamp the workpiece.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a clamp of preapring for an unfavorable turn of events shape which characterized in that: the anti-deformation clamp comprises a plurality of chain plates (1) and rotating pins (2), wherein the chain plates (1) are long strips, the chain plates (1) are sequentially hinged end to form a segment-shaped long strip, and the rotating pins (2) are arranged at the connecting positions of adjacent chain plates (1); the chain plate (1) comprises a plate body (11) and a transmission shaft (13), the transmission shaft (13) comprises a shaft body (131) and an end gear (132), and the rotating pin (2) comprises a pin head (21) and a middle rotating gear (22);

the transmission hinge holes (111) are formed in two ends of each plate body (11) and are perpendicular to the length direction of the plate body, the transmission hinge holes (111) are stepped holes, the transfer gear (22) is formed by combining two back-to-back bevel gears, pin heads (21) axially extend from two ends of the transfer gear (22) respectively, the pin heads (21) are rotatably connected with one ends of the two plate bodies (11) which are close to each other respectively, through holes are formed in the plate bodies (11) along the length direction of the plate bodies and penetrate through the rotatable shaft bodies (131), the end gears (132) are arranged at two ends of the shaft bodies (131), and the end gears (132) are meshed with the transfer gear (22); the deformation-preventing clamp further comprises a resistance matching component (14), a damping groove (112) is formed in the plate body (11), the resistance matching component (14) is located in the damping groove (112), and the resistance matching component (14) exerts rotation resistance with an opening threshold value on the shaft body (131); the resistance matching component (14) comprises a sliding block (141), a resisting spring (142) and an elastic bulge structure, a threaded section (133) is arranged on the shaft body (131), a through hole is formed in the center of the sliding block (141), an internal thread is formed in the through hole, the outer edge of the sliding block (141) is of a non-circular contour, the sliding block (141) slides in the damping groove (112), a damping bulge (1411) is arranged on the side surface of the sliding block (141), the elastic bulge structure is arranged on the wall surface of the damping groove (112), two ends of the sliding block (141) are respectively resisted by the resisting spring (142), and the internal thread is matched with the thread of the threaded section (133);

elastic bulge structure includes plug screw (143), pretightning force spring (144) and bull's eye bearing (145), from damping groove (112) toward setting up the ladder mounting hole outward on plate body (11) lateral wall, the position that is close to plate body (11) surface in the ladder mounting hole sets up the screw thread, bull's eye bearing (145) set up at the ladder mounting hole, and bull's eye bearing (145) stretches out the bearing ball towards damping groove (112) in, plug screw (143) revolve the closure in the ladder mounting hole and compress tightly bull's eye bearing (145) through pretightning force spring (144).

2. The deformation preventing jig as set forth in claim 1, wherein: the thread of the thread section (133) is a double-thread fine-thread.