CN216462149U - Clamping device with adjustable broach height and broaching machine - Google Patents

Abstract

The utility model relates to a double-layered sword device and broaching machine of adjustable broach height. The cutter clamping device capable of adjusting the height of the broach comprises a mounting seat, a cutter clamping mechanism and an adjusting mechanism. The cutter clamping mechanism is arranged on the mounting seat. The cutter clamping mechanism is provided with a clearance through hole which penetrates through the top end and the bottom end. A plurality of clamping jaws are arranged in the avoiding through hole along the circumferential direction of the avoiding through hole. A clamping space with adjustable size is formed among the clamping jaws. The clamping space is used for clamping the neck of the broach inserted into the clearance through hole from the top end. The adjusting mechanism comprises an adjusting rod. One end of the adjusting rod is provided with a butting surface for butting against the handle part of the broach, and the other end of the adjusting rod is provided with an adjusting part. The inner wall of the avoiding through hole close to the bottom end is provided with a matching part. One end of the adjusting rod with a propping surface is slidably arranged in the avoiding through hole in a penetrating way. The adjusting part is matched with the matching part to adjust the height of the abutting surface, so that the broaching stress surface of the broach is attached to the clamping jaw. The height-adjustable tool clamping device is used, so that the broaching machine can have higher universality and lower use cost.

Description

Broach clamping device with adjustable broach height and broaching machine

Technical Field

The utility model relates to a broaching machine makes technical field, especially relates to a double-layered sword device and broaching machine of adjustable broach height.

Background

In metal working, broaching is a machine tool for working a through hole, a flat surface and a formed surface of a workpiece using a broach as a tool, which can achieve high dimensional accuracy and small surface roughness.

In the existing broaching machine, broaches are usually directly fixed on a walking plate or a machine body, the fixation of broaches with different heights cannot be met, the universality is low, the neck of the broaches with small diameters is quite consented to fracture in the long-term broaching process, and the use cost of the broaching machine is increased.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a broach clamping device with adjustable broach height and a broaching machine, which can reduce the use cost of the broaching machine and improve the universality of the broaching machine, aiming at the problems of high use cost and low universality of the traditional broaching machine.

A knife clamping device capable of adjusting the height of a broach comprises a mounting seat, a knife clamping mechanism and an adjusting mechanism;

the cutter clamping mechanism is provided with a top end and a bottom end which are opposite; the cutter clamping mechanism is arranged on the mounting seat; the cutter clamping mechanism is provided with a position avoiding through hole penetrating through the top end and the bottom end; a plurality of clamping jaws are arranged in the avoiding through hole along the circumferential direction of the avoiding through hole; clamping spaces with adjustable sizes are formed among the clamping jaws; the clamping space is used for clamping the neck of the broach inserted into the avoiding through hole from the top end;

the adjusting mechanism comprises an adjusting rod; one end of the adjusting rod is provided with a butting surface for butting against the handle part of the broach, and the other end of the adjusting rod is provided with an adjusting part; the inner wall of the avoiding through hole close to the bottom end is provided with a matching part; one end of the adjusting rod, which is provided with the abutting surface, is slidably arranged in the avoiding through hole in a penetrating way; the adjusting part is matched with the matching part to adjust the height of the abutting surface, so that the broaching stress surface of the broach is attached to the clamping jaw.

In some embodiments, the adjusting portion is an internal thread formed on an inner wall of the avoiding through hole, and the matching portion is an external thread formed on one end of the adjusting rod far away from the abutting surface; the external thread is in threaded fit with the internal thread so as to adjust the height of the abutting surface.

In some embodiments, a limiting groove is formed on the inner wall of the avoiding through hole, which is close to the bottom end, along the circumferential direction of the avoiding through hole; the adjusting part is positioned on one side of the avoiding groove, which is deviated from the top end; the adjusting part can be abutted against the inner wall of the limiting groove.

In some of these embodiments, the adjustment mechanism further comprises a first locking member; one end of the adjusting rod, which is far away from the abutting surface, penetrates through the avoiding through hole to be connected with the first locking piece; the first locking piece is abutted against the opening edge part of the avoiding through hole close to the bottom end so as to lock the adjusting rod in the axial direction.

In some embodiments, the adjusting rod comprises a loop bar which is of a hollow structure with openings at two ends and a propping block arranged at one end of the loop bar; one end of the abutting block, which is far away from the loop bar, is provided with the abutting surface; the abutting surface is provided with a through hole communicated with the inside of the loop bar; one end of the loop bar, which is far away from the abutting block, is provided with the adjusting part.

In some embodiments, the knife clamping mechanism comprises a knife clamping seat arranged on the mounting seat, a knife clamping main body with the clearance through hole, a rotary sliding sleeve with two open ends and a driving piece; the knife holder seat is provided with an installation through hole;

the clamping cutter main body is arranged in the mounting through hole; one end of the clamping knife main body can be rotatably arranged in the rotary sliding sleeve in a penetrating way; the side wall of one end of the cutter clamping main body, which is positioned in the rotary sliding sleeve, is provided with a plurality of guide holes at intervals along the circumferential direction of the mounting through hole; an arc-shaped groove communicated with the guide hole is formed in the position, corresponding to each guide hole, of the inner wall of the rotary sliding sleeve;

the plurality of guide holes are respectively in one-to-one correspondence with the plurality of clamping jaws; each clamping jaw is slidably arranged in the corresponding guide hole in a penetrating way; one end of each clamping jaw abuts against the inner wall of the corresponding arc-shaped groove; one end of each clamping jaw departing from the arc-shaped groove is surrounded to form the clamping space;

the driving piece is used for providing a driving force for driving the rotary sliding sleeve to rotate forwards or reversely so as to drive the plurality of claws to fold inwards or unfold outwards, so that the size of the clamping space is adjusted.

In some of these embodiments, the knife clamping mechanism further comprises a second locking member; one end, far away from the rotary sliding sleeve, of the cutter clamping main body penetrates through the mounting through hole and is connected with the second locking piece; the second locking piece is abutted against the mounting seat so as to lock the cutter clamping main body in the axial direction.

In some embodiments, the driving member is a driving cylinder; the knife clamping mechanism further comprises a shifting fork connected with the outer wall of the rotary sliding sleeve and a sliding part rotatably connected with one end, far away from the rotary sliding sleeve, of the shifting fork; the sliding piece is slidably arranged on the mounting seat; and a piston rod of the driving oil cylinder is in transmission connection with the sliding piece and is used for driving the sliding piece to reciprocate along the direction vertical to the axial direction of the rotating sliding sleeve so as to drive the rotating sliding sleeve to rotate in the forward direction or the reverse direction.

In some embodiments, the cutter clamping mechanism further comprises a left stroke limiting piece, a left limiting piece, a right limiting piece and a right stroke limiting piece which are sequentially arranged at intervals along the sliding direction of the sliding piece; the left travel limiting piece and the right travel limiting piece are both arranged on the mounting seat; the left limiting block and the right limiting block are arranged on the sliding piece; the sliding piece can move to the position where the left limiting block abuts against the left travel limiting piece or the position where the right limiting block abuts against the right travel limiting piece along the direction perpendicular to the axial direction of the rotary sliding sleeve.

A broaching machine comprises a machine body, the clamping device with the adjustable broaching height and the broaching tool;

the mounting seat is mounted on the bed body; the broach is clamped in the clamping space.

When the broach clamping device and the broaching machine with the adjustable broach height are used, the height of the abutting surface in the clearance through hole can be adjusted through the matching of the adjusting part and the matching part, so that broaches with different heights can be effectively clamped in the clamping space, and the broaches with different heights can be installed on the broaching machine by utilizing the broach clamping device with the adjustable broach height, and the universality of the broaching machine is improved. Furthermore, when the neck of the broach is clamped in the clamping space, the abutting surface abuts against the handle of the broach, and the inside of the broaching hand of the broach is abutted against the clamping jaw, so that the impact force applied to the broach during broaching is reduced, the probability of breakage of the small-diameter broach can be reduced, and the service life of the small-diameter broach is longer. Therefore, the height-adjustable knife clamping device is used, so that the broaching machine can have high universality and low use cost.

Drawings

Fig. 1 is a schematic structural view of a broach clamped by a clamping device with an adjustable broach height according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a tool clamping device with adjustable broach height according to a preferred embodiment of the present invention;

FIG. 3 is a schematic view of the adjustable broach height toolholder assembly shown in FIG. 2 with the mounting block and toolholder block removed;

FIG. 4 is a cross-sectional view A-A of the adjustable broach height clamping device shown in FIG. 3;

fig. 5 is a B-B sectional view of the adjustable broach height clamping device shown in fig. 4.

Description of reference numerals: 100. a clamping device capable of adjusting the height of the broach; 110. a mounting base; 120. a knife clamping mechanism; 121. a top end; 122. a bottom end; 123. avoiding a through hole; 1231. a fitting portion; 1232. a limiting groove; 124. a claw; 125. a clamping space; 126. a knife holder seat; 127. a cutter clamping main body; 1271. a guide hole; 128. rotating the sliding sleeve; 1281. an arc-shaped slot; 129. a drive member; 1201. a second locking member; 1202. a shifting fork; 1203. a slider; 1204. a left travel limit; 1205. a left stop block; 1206. a right stopper; 1207. a right travel limit; 130. an adjustment mechanism; 131. adjusting a rod; 1311. a propping surface; 1312. an adjustment section; 1313. a loop bar; 1314. a holding block; 132. a first locking member; 200. broaching; 210. a handle; 220. a neck portion; 230. a blade portion; 240. and (5) broaching the stress surface.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

When an element is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present, unless otherwise specified. It will also be understood that when an element is referred to as being "between" two elements, it can be the only one between the two elements, or one or more intervening elements may also be present.

Where the terms "comprising," "having," and "including" are used herein, another element may be added unless an explicit limitation is used, such as "only," "consisting of … …," etc. Unless mentioned to the contrary, terms in the singular may include the plural and are not to be construed as being one in number.

The utility model provides a double-layered sword device and broaching machine of adjustable broach height. Wherein, the broaching machine comprises a machine body, a cutter clamping device with adjustable broaching height and a broaching tool. The cutter clamping device with the height of the broach adjustable is arranged on the lathe bed. The broach is clamped on the tool clamping device with the height of the broach adjustable so as to realize the installation of the broach on the lathe bed.

Fig. 1 shows a structure of a broach according to an embodiment of the present invention. For the purpose of illustration, the drawings show only the structures associated with the embodiments.

Referring to fig. 1, the broach 200 includes a shank portion 210, a neck portion 220 and a blade portion 230, which are connected in sequence. The joint of the shank 210 and the neck 220 has a broaching force-bearing surface 240. To improve the stability of the broach 200 on the broaching machine, the neck portion 220 is typically clamped by a clamping device with an adjustable broach height to achieve mounting of the broach 200.

Of course, in other embodiments, the tool clamping device with adjustable broach height may also be applied to other machine tools, such as milling machines, planing machines, etc., and can clamp tools, such as milling cutters or planing tools, etc., on the machine body of the machine tool. In the present application, the knife clamping device with adjustable broach height is mainly used in a broaching machine for example.

Fig. 2 and 3 show the structure of the tool clamping device with adjustable broach height according to an embodiment of the present invention. For the purpose of illustration, the drawings show only the structures associated with the embodiments.

Referring to fig. 2 and 3, a knife clamping device 100 with adjustable broach height according to a preferred embodiment of the present invention includes a mounting base 110, a knife clamping mechanism 120 and an adjusting mechanism 130.

The mounting base 110 mainly plays a role in supporting and connecting, and may be a frame structure, or an installation platform, a shell structure, or the like. In the broaching machine, a mounting seat 110 is mounted on a machine body to realize the mounting of the clamping device 100 with adjustable broaching height on the machine body.

Referring to fig. 4 and 5, the clamping mechanism 120 has a top end 121 and a bottom end 122 opposite to each other. When the broaching machine is positioned on the horizontal plane, the top end 121 and the bottom end 122 are respectively the upper end and the lower end of the clamping mechanism 120. The clamping mechanism 120 is mounted on the mounting base 110. The clamping mechanism 120 has a clearance hole 123 penetrating the top end 121 and the bottom end 122. A plurality of claws 124 are arranged in the avoiding through hole 123 along the circumferential direction thereof. A clamping space 125 with an adjustable size is formed between the plurality of jaws 124. The holding space 125 is used for holding the neck 220 of the broach 200 inserted into the clearance through-hole 123 from the top end 121. The avoiding through hole 123 may be a through hole in a circular shape, a rectangular shape, an irregular shape, or the like, may be a vertical hole formed in one part, or may be formed by communicating a plurality of holes formed in a plurality of parts, respectively.

It is understood that plural refers to a number greater than or equal to 2, whereby the number of jaws 124 is greater than or equal to 2.

The adjustment mechanism 130 includes an adjustment lever 131. The adjustment rod 131 has an abutting surface 1311 for abutting against the shank 210 of the broach 200 at one end thereof, and an adjustment portion 1312 at the other end thereof. The inner wall of the avoiding through hole 123 near the bottom end 122 is formed with a fitting portion 1231. One end of the adjusting rod 131 having the abutting surface 1311 is slidably disposed through the avoiding through hole 123. The adjusting portion 1312 and the fitting portion 1231 cooperate to adjust the height of the abutting surface 1311, so that the broaching force-bearing surface 240 of the broaching tool 200 is abutted against the claw 124. Accordingly, since the adjustment rod 131 is inserted into the clearance through-hole 123 from the lower opening of the clearance through-hole 123, the contact surface 1311 for contacting the shank 210 of the broach 200 is upwardly disposed as a flat surface.

When the clamping device 100 with the adjustable broach height is required to clamp the broach 200, the broach 200 is firstly inserted into the clearance through hole 123 from the upper end opening of the clearance through hole 123; the adjusting part 1312 is matched with the matching part 1231 to adjust the position of the adjusting rod 131 in the avoiding through hole 123 until the abutting surface 1311 abuts against the handle part 210 of the broach 200; the clamping operation of the broach 200 is completed by adjusting the size of the clamping space 125 to clamp the neck 220 of the broach 200 in the clamping space and ensure that the broaching force bearing surface 240 of the broach 200 can be attached to the jaws 124.

Therefore, the clamping space 125 can accurately clamp the necks 220 of the broaches 200 with different heights by adjusting the heights of the abutting surfaces 1311 in the avoiding through holes 123, so that the broach clamping device 100 with the adjustable broach height can clamp the broaches 200 with different heights, and the universality of the broaching machine is improved.

Further, when the broaching tool 200 is clamped in the clamping space 125, the broaching force bearing surface 240 of the broaching tool 200 can be attached to the clamping jaw 124 under the action of the abutting surface 1311, so that the impact force applied to the broaching tool 200 in the broaching process can be reduced, the probability of breakage of the small-diameter broaching tool 200 can be reduced, the service life of the small-diameter broaching tool 200 can be prolonged, and the use cost of the broaching machine can be reduced. Therefore, the arrangement of the clamping device 100 with adjustable broach height enables the broaching machine to have both high universality and low use cost.

In some embodiments, the adjustment portion 1312 is an internal thread formed on an inner wall of the clearance hole 123. The fitting portion 1231 is an external thread formed at an end of the adjusting lever 131 far from the abutting surface 1311. The external thread and the internal thread are in threaded fit to adjust the height of the abutting surface 1311. Therefore, when the height of the abutting surface 1311 needs to be adjusted, only the adjusting rod 131 needs to be screwed, so that the adjusting portion 1312 is set as an internal thread, and the matching portion 1231 is set as an external thread, so that the height of the abutting surface 1311 can be adjusted simply and conveniently, and the use convenience of the broach clamping device 100 for adjusting the height of the broach can be improved.

It is understood that, in other embodiments, the adjusting portion 1312 may also be a spiral groove disposed along the longitudinal direction of the adjusting rod 131, and the engaging portion 1231 is a spiral rib disposed on the outer wall of the adjusting rod. Of course, the adjusting portion 1312 may also be a locking slot spaced along the longitudinal direction of the adjusting rod 131, and the fitting portion 1231 is a protrusion structure having elastic deformation performance and matching with the locking slot.

In some embodiments, the inner wall of the clearance through hole 123 near the bottom end 122 is formed with a limiting groove 1232 along a circumference thereof. The adjustment portion 1312 is located on a side of the relief groove facing away from the tip 121. The regulating portion 1312 may abut against an inner wall of the restricting groove 1232. Therefore, the limiting groove 1232 is mainly used for limiting the upward moving position of the adjusting part 1312, so as to avoid the situation that the adjusting rod 131 excessively moves upward to cause the clamping of the broach 200 to be loose or the broach 200 is separated from the clearance through hole 123, and is beneficial to the use reliability and the use safety of the broach height adjustable clamping device 100.

Specifically, when the adjusting portion 1312 is an internal thread, the internal thread is located below the limiting groove 1232 and is communicated with the limiting groove 1232, and when the adjusting rod 131 is screwed until the external thread abuts against the inner wall of the limiting groove 1232, the adjusting rod 131 cannot be screwed continuously, so as to achieve the purpose of limiting the upward movement position of the adjusting rod 131.

In some embodiments, adjustment mechanism 130 further includes a first locking member 132. One end of the adjusting rod 131 far from the abutting surface 1311 passes through the avoiding through hole 123 and is connected to the first locking member 132. The first locking member 132 abuts against the opening edge of the avoiding through hole 123 near the bottom end 122, so as to lock the adjusting rod 131 in the axial direction. Therefore, the arrangement of the first locking member 132 can prevent the adjusting rod 131 from sliding in the axial direction after being adjusted in place, greatly reduce the probability of looseness of the adjusting rod 131, and improve the structural stability of the broach clamping device 100 with adjustable broach height.

Specifically, when the mating portion 1231 is externally threaded, the first securing member 132 is a lock nut. The locking nut is in threaded fit with the external thread, so that the adjusting rod 131 can be locked. Since the lock nut is a standard component, the first lock member 132 is configured as a lock nut, which facilitates the mounting or dismounting operation using a common tool, and also contributes to the reduction of the processing cost of the above-mentioned blade clamping device for the height of the clip strip broach 200. More specifically, the first locking member 132 is two locking nuts to perform double-nut locking of the adjusting lever 131.

In addition, the first locking member 132 may be a structure that can be mortise-tenon connected to the adjustment rod 131. The first locking member 132 is made of 304 stainless steel and has the characteristics of easiness in processing, high temperature resistance and high toughness, so that the first locking member 132 is not easy to deform, and the first locking member 132 can be ensured to fix the adjusting rod 131 firmly

In some embodiments, the adjusting rod 131 includes a hollow rod 1313 with two open ends and a holding block 1314 disposed at one end of the rod 1313. The end of the holding block 1314 facing away from the stem 1313 has a holding surface 1311. The abutting surface 1311 is provided with a via hole (not shown) communicating with the inside of the loop bar 1313. The end of the stem 1313 remote from the holding block 1314 has an adjustment 1312. Therefore, the adjusting rod 131 is of a hollow structure, in the broaching process, cooling liquid and scraps flowing into the avoiding through hole 123 can flow into the sleeve rod 1313 through the hole and flow out through the sleeve rod 1313, so that the chip removal capacity of the broaching machine is improved, the probability of damaging the machining surface of the workpiece to be machined due to the fact that the chips are not removed in time can be reduced, and the broaching machining precision is improved.

In some embodiments, the knife clamping mechanism 120 includes a knife clamping seat 126 mounted on the mounting seat 110, a knife clamping main body 127 having a clearance through hole 123, a rotary sliding sleeve 128 with two open ends, and a driving member 129.

The holder 126 is provided with a mounting hole (not shown). The clamping tool main body 127 is arranged in the mounting through hole so as to realize the mounting between the clamping tool main body 127 and the clamping tool seat. One end of the clamping knife main body 127 is rotatably arranged in the rotating sliding sleeve 128 in a penetrating way. The side wall of the clamping knife main body 127 at one end inside the rotary sliding sleeve 128 is provided with a plurality of guide holes 1271 at intervals along the circumference of the mounting through hole. The plurality of guide holes 1271 are radially arranged. An arc-shaped groove 1281 communicating with the guide hole 1271 is formed at a position of the inner wall of the rotary sliding sleeve 128 corresponding to each guide hole 1271.

The plurality of guide holes 1271 correspond to the plurality of jaws 124 one to one, respectively. Each jaw 124 is slidably disposed through a corresponding guide aperture 1271. One end of each claw 124 abuts against the inner wall of the corresponding arc-shaped groove 1281. The end of the plurality of jaws 124 facing away from the arcuate slot 1281 is enclosed to form a clamping space 125.

The driving member 129 is used for providing a driving force to drive the rotating sleeve 128 to rotate in a forward direction or a reverse direction so as to drive the plurality of jaws 124 to close or open inwards, thereby adjusting the size of the clamping space 125. Specifically, the driving member 129 is mounted on the mounting base 110 and provides a driving force for the rotating sleeve 128. The driving member 129 may be a motor, a hydraulic cylinder, an electric cylinder, or the like.

In practical use, when the driving member 129 drives the rotating sliding sleeve 128 to rotate forward, the distance from the inner wall of the arc-shaped groove 1281 aligned with the guide hole 1271 to the central axis of the rotating sliding sleeve 128 gradually decreases, so that the claws 124 slide inward under the pushing of the inner wall of the arc-shaped groove 1281 until the claws 124 are folded inward to clamp the neck 220 of the broach 200 in the clamping space 125; when the driving member 129 drives the rotary sliding sleeve 128 to rotate reversely, the distance from the inner wall of the arc-shaped groove 1281 aligned with the guide hole 1271 to the central axis of the rotary sliding sleeve 128 gradually increases, and at this time, the plurality of clamping jaws are opened outwards until the inner end of each clamping jaw 124 leaves the neck 220 of the broach 200, so as to realize the release of the broach 200 in the clamping space 125.

Specifically, when the adjusting mechanism 130 includes the first locking member 132, the first locking member 132 is connected to an end of the adjusting rod 131 far from the abutting surface 1311 and abuts against a bottom of the main body 127 of the blade clamp to axially lock the adjusting rod 131.

Further, in some embodiments, the clamping mechanism 120 further includes a second locking member 1201. The end of the knife clamping main body 127 far away from the rotary sliding sleeve 128 passes through the mounting through hole and is connected with the second locking member 1201. The second locking member 1201 abuts the mounting base 110 to lock the blade holding body 127 in the axial direction. Therefore, the second locking member 1201 can prevent the clamping tool main body 127 from sliding in the axial direction, so that the probability of loosening the clamping tool main body 127 is greatly reduced, the structural stability of the clamping tool mechanism 120 is improved, and the structural stability of the clamping tool device 100 with the adjustable broach height is further improved.

Specifically, the second locking member 1201 is a locking nut, and one end of the knife clamping body 127 is a threaded rod which penetrates through the second locking member 1201 and is in threaded connection with the second locking member 1201. More specifically, the second locking member 1201 is two locking nuts to achieve double-nut locking of the blade clamping body 127.

Further, in some embodiments, the drive 129 is a drive cylinder. The knife clamping mechanism 120 further comprises a shifting fork 1202 connected with the outer wall of the rotary sliding sleeve 128, and a sliding member 1203 rotatably connected with one end of the shifting fork 1202 far away from the rotary sliding sleeve 128. The slider 1203 is slidably mounted on the mount 110. The piston rod of the driving cylinder is in transmission connection with the sliding member 1203 and is used for driving the sliding member 1203 to reciprocate along the direction perpendicular to the axial direction of the rotating sliding sleeve 128 so as to drive the rotating sliding sleeve 128 to rotate in the forward direction or the reverse direction. Specifically, a rotating shaft (not shown) is disposed on the sliding member 1203, and an end of the shifting fork 1202 away from the rotating sleeve 128 is rotatably connected to the rotating shaft. In practical use, the driving member 129 drives the sliding member 1203 to drive the rotating shaft to move along a direction perpendicular to the axial direction of the rotating sleeve, and at this time, the rotating shaft will shift the shifting fork 1202 to drive the rotating sleeve 128 to rotate in the forward direction or the reverse direction.

Further, in some embodiments, the knife clamping mechanism 120 further includes a left stroke limiting member 1204, a left limiting member 1205, a right limiting member 1206 and a right stroke limiting member 1207, which are sequentially disposed at intervals along the sliding direction of the sliding member 1203. The left stroke limiter 1204 and the right stroke limiter 1207 are disposed on the mounting base 110. The left stopper 1205 and the right stopper 1206 are both disposed on the slider 1203. The sliding member 1203 can move along the direction perpendicular to the axial direction of the rotating sliding sleeve 128 until the left limiting block 1205 abuts against the left stroke limiting member 1204 or the right limiting block 1206 abuts against the right stroke limiting member 1207.

When the driving member 129 drives the sliding member 1203 to drive the rotating sleeve 128 to rotate forward until the plurality of jaws 124 contract inward to clamp the broach 200, the sliding member 1203 drives the left limiting block 1205 and the right limiting block 1206 to move from left to right until the right limiting block 1206 abuts against the right stroke limiting member 1207, and at this time, the right stroke limiting member 1207 stops the driving member 129 from working, so that the sliding member 1203 stops driving the rotating sleeve 128 to rotate forward; when the driving member 129 drives the sliding member 1203 to drive the rotating sliding sleeve 128 to rotate reversely until the plurality of claws 124 are opened outwards to loosen the broach 200, the sliding member 1203 drives the left limiting block 1205 and the right limiting block 1206 to move from right to left until the left limiting block 1205 abuts against the left stroke limiting member 1204, and at this time, the right stroke limiting member 1207 stops the driving member 129 from working, so that the sliding member 1203 also drives the rotating sliding member to stop rotating reversely. Therefore, the left stroke limiting piece 1204 is matched with the left limiting block 1205, and the right stroke limiting piece 1207 is matched with the right limiting block 1206, so that the clamping knife device 100 with the adjustable broach height can be ensured to safely and accurately operate, and the safety of the broaching machine is further improved.

Specifically, in the present embodiment, the left stroke limiter 1204 and the right stroke limiter 1207 are both stroke switches. Because the travel switch is higher in protection level compared with travel limit pieces such as a traditional proximity switch, the left travel limit piece 1204 and the right travel limit piece 1207 are both set as the travel switch, so that the probability of misoperation caused by the fact that cutting fluid enters the left travel limit piece 1204 and the right travel limit piece 1207 in the broaching process of the broaching machine can be reduced, and the use reliability of the broaching machine is further improved.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A knife clamping device with adjustable broach height is characterized by comprising a mounting seat, a knife clamping mechanism and an adjusting mechanism;

the cutter clamping mechanism is provided with a top end and a bottom end which are opposite; the cutter clamping mechanism is arranged on the mounting seat; the cutter clamping mechanism is provided with a position avoiding through hole penetrating through the top end and the bottom end; a plurality of clamping jaws are arranged in the avoiding through hole along the circumferential direction of the avoiding through hole; clamping spaces with adjustable sizes are formed among the clamping claws; the clamping space is used for clamping the neck of the broach inserted into the clearance through hole from the top end;

the adjusting mechanism comprises an adjusting rod; one end of the adjusting rod is provided with a butting surface for butting against the handle part of the broach, and the other end of the adjusting rod is provided with an adjusting part; the inner wall of the avoiding through hole close to the bottom end is provided with a matching part; one end of the adjusting rod, which is provided with the abutting surface, can be slidably arranged in the avoiding through hole in a penetrating way; the adjusting part is matched with the matching part to adjust the height of the abutting surface, so that the broaching stress surface of the broach is attached to the clamping jaw.

2. The broach clamp device with the adjustable broach height according to claim 1, wherein the adjusting part is an internal thread formed on an inner wall of the clearance through hole, and the matching part is an external thread formed on one end of the adjusting rod far away from the abutting surface; the external thread is in threaded fit with the internal thread so as to adjust the height of the abutting surface.

3. The broach device with adjustable broach height according to claim 1, wherein the inner wall of the clearance through hole close to the bottom end is formed with a limiting groove along the circumferential direction thereof; the adjusting part is positioned on one side of the avoiding groove, which is deviated from the top end; the adjusting part can be abutted against the inner wall of the limiting groove.

4. The adjustable broach height clamping apparatus according to claim 1, wherein the adjustment mechanism further comprises a first lock member; one end of the adjusting rod, which is far away from the abutting surface, penetrates through the avoiding through hole to be connected with the first locking piece; the first locking piece is abutted against the opening edge part of the avoiding through hole close to the bottom end so as to lock the adjusting rod in the axial direction.

5. The broach clamping device with the adjustable broach height according to claim 1, wherein the adjusting lever comprises a loop bar which is of a hollow structure with openings at two ends and a supporting block arranged at one end of the loop bar; one end of the abutting block, which is far away from the loop bar, is provided with the abutting surface; the abutting surface is provided with a through hole communicated with the inside of the loop bar; one end of the loop bar, which is far away from the abutting block, is provided with the adjusting part.

6. The broach clamping device with the adjustable broach height according to claim 1, wherein the broach clamping mechanism comprises a broach clamping seat mounted on the mounting seat, a broach clamping main body with the clearance through hole, a rotary sliding sleeve with openings at two ends and a driving part; the knife holder seat is provided with an installation through hole;

the clamping cutter main body is arranged in the mounting through hole; one end of the clamping knife main body can be rotatably arranged in the rotary sliding sleeve in a penetrating way; the side wall of one end of the cutter clamping main body, which is positioned in the rotary sliding sleeve, is provided with a plurality of guide holes at intervals along the circumferential direction of the mounting through hole; an arc-shaped groove communicated with the guide hole is formed in the position, corresponding to each guide hole, of the inner wall of the rotary sliding sleeve;

the plurality of guide holes are respectively in one-to-one correspondence with the plurality of clamping jaws; each clamping jaw is slidably arranged in the corresponding guide hole in a penetrating way; one end of each clamping jaw is abutted against the inner wall of the corresponding arc-shaped groove; one end of each clamping jaw departing from the arc-shaped groove is surrounded to form the clamping space;

the driving piece is used for providing a driving force for driving the rotary sliding sleeve to rotate forwards or reversely so as to drive the plurality of claws to fold inwards or unfold outwards, so that the size of the clamping space is adjusted.

7. The adjustable broach height clamping device according to claim 6, wherein the clamping mechanism further includes a second locking member; one end, far away from the rotary sliding sleeve, of the cutter clamping main body penetrates through the mounting through hole and is connected with the second locking piece; the second locking piece is abutted against the mounting seat so as to lock the cutter clamping main body in the axial direction.

8. The broaching tool height adjusting clamping device of claim 6, wherein the driving member is a driving cylinder; the knife clamping mechanism further comprises a shifting fork connected with the outer wall of the rotary sliding sleeve and a sliding part rotatably connected with one end, far away from the rotary sliding sleeve, of the shifting fork; the sliding piece is slidably arranged on the mounting seat; and a piston rod of the driving oil cylinder is in transmission connection with the sliding piece and is used for driving the sliding piece to reciprocate along the direction vertical to the axial direction of the rotating sliding sleeve so as to drive the rotating sliding sleeve to rotate in the forward direction or the reverse direction.

9. The broaching tool height-adjustable clamping device according to claim 8, wherein the clamping mechanism further comprises a left stroke limiting piece, a left limiting piece, a right limiting piece and a right stroke limiting piece which are sequentially arranged at intervals along the sliding direction of the sliding piece; the left travel limiting piece and the right travel limiting piece are both arranged on the mounting seat; the left limiting block and the right limiting block are arranged on the sliding piece; the sliding piece can move to the position where the left limiting block abuts against the left travel limiting piece or the position where the right limiting block abuts against the right travel limiting piece along the direction perpendicular to the axial direction of the rotary sliding sleeve.

10. A broaching machine, which comprises a machine body, the clamping device with the adjustable broaching height of any one of claims 1 to 9 and a broaching tool;

the mounting seat is mounted on the bed body; the broach is clamped in the clamping space.

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