CN210024576U

CN210024576U - Clamp

Info

Publication number: CN210024576U
Application number: CN201920779439.7U
Authority: CN
Inventors: 赵海峰; 郭燕; 汪晓东; 崔吉; 郝钢; 王小明
Original assignee: Nanjing Vocational College Of Information Technology
Current assignee: Nanjing Vocational College Of Information Technology
Priority date: 2019-05-28
Filing date: 2019-05-28
Publication date: 2020-02-07
Anticipated expiration: 2029-05-28

Abstract

The utility model discloses an anchor clamps, the technical problem who solves: the technical problem of the prior art mentioned in the background art that a main hole on a pneumatic pick handle body is not machined and the fixing clamp is suitable for being used on a lathe is solved. According to the technical scheme, the clamp comprises a flange plate, a clamp body, two oppositely-combined clamping blocks, two L-shaped shifting forks and a pull rod, wherein the clamp body is arranged on the flange plate, the pull rod is connected with the flange plate in a sliding mode, the two oppositely-combined clamping blocks are symmetrically arranged on the upper portion of the clamp body, and the two shifting forks are arranged on the clamp body in a swinging mode and are connected with the pull rod to drive the two oppositely-combined clamping blocks to act. The advantages are that: according to the clamp, the cylinder pull rod on the lathe spindle is used for driving the pull rod to move, the shifting fork swings to push the V-shaped clamping blocks sliding in an involutory mode to clamp a workpiece to be machined, the workpiece to be machined is clamped while centering is achieved, the clamp is reliable and convenient to install, and the clamping efficiency is improved.

Description

Clamp

Technical Field

The utility model relates to a processing equipment for machining specifically is to a anchor clamps that the main porthole was processed on the pneumatic pick handle body.

Background

The rock drilling equipment is mainly used for breaking soft ores, breaking firm or cement buildings, mining clay and the like, and is mainly a pneumatic rock drilling tool. The handle body related to the design is one of important parts of the hand-held pneumatic tool air pick. The part is a precision casting, is irregular in shape and multiple in machining procedures, wherein the precision requirement of the main hole 902 is higher, the part has a matching requirement with a cylinder body during assembly, and the part has a matching requirement with a gas distribution original piece and is also a main reference for subsequent machining. The main hole is machined mainly on a lathe, and the design of proper technological equipment for turning the handle body is very important.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that lacks the main cut processing on the pneumatic pick handle body and be applicable to the mounting fixture's that uses on the lathe technical problem among the prior art to mentioning among the background art.

The utility model adopts the technical proposal that: a clamp comprises a flange plate, a clamp body, two involutory clamping blocks, two L-shaped shifting forks and a pull rod, wherein the clamp body is arranged on the flange plate, the pull rod is connected with the flange plate in a sliding manner, the two involutory clamping blocks are symmetrically arranged at the upper part of the clamp body, and the two shifting forks are arranged on the clamp body in a swinging manner and are connected with the pull rod to drive the two involutory clamping blocks to act;

the fixture body comprises a disc-shaped substrate and a fixture body arranged on the substrate, a flange plate is connected to the back of the substrate, the bottom of the fixture body is connected with the front of the substrate, a sliding groove with a rectangular cross section is concavely arranged at the top of the fixture body, two ends of the sliding groove are communicated with the fixture body, an arc groove is concavely arranged in the middle of the bottom of the sliding groove, and pressing plates are arranged on two side groove walls at two ends of the notch of the sliding groove; a sinking groove is vertically arranged on the clamp body and is crosswise arranged with the sliding groove, the notch of the sinking groove is communicated with the groove bottom of the arc groove, and two ends of the sinking groove are communicated with the clamp body; the groove bottoms at the two ends of the sliding groove are both provided with a shifting fork guide groove for mounting a shifting fork in a concave manner; a central round hole for positioning is arranged at the central position of the back surface of the substrate;

the turning parts of the two L-shaped shifting forks are respectively and rotatably arranged in two shifting fork guide grooves on the clamp body through pins; the shifting fork heads at one ends of the two L-shaped shifting forks are cylindrical, the two shifting fork heads are respectively inserted into the two clamping blocks, the shifting fork legs at the other ends of the two L-shaped shifting forks are cylindrical, and the two shifting fork legs are inserted into the pull rod;

one end of each of the two clamping blocks is provided with a V-shaped jaw, the two clamping blocks are symmetrically arranged in a chute of the clamp body, and the V-shaped jaws on the two clamping blocks are oppositely arranged for clamping a workpiece; the edges of two sides of the upper surface of the clamping block are respectively provided with an inwards concave guide notch, and the upper guide surfaces of the four guide notches are respectively in sliding fit with the lower surfaces of the four pressing plates; the two clamping blocks are provided with shifting fork notches for the shifting fork heads to insert;

the pull rod is inserted into the center of the flange plate and slides, a pull rod head at one end of the pull rod extends into the central circular hole, and the pull rod head is provided with a ring groove for inserting the two shifting fork legs.

The utility model discloses well anchor clamps combines the lathe design, and anchor clamps pass through ring flange and lathe spindle coupling, and the other end of anchor clamps inner pull rod is the screw rod, and the cylinder pull rod of lathe main shaft end is connected to the screw rod, and the cylinder pull rod through lathe main shaft end drives the pull rod along the horizontal slip, and the pull rod head is removed and is promoted two shift fork swings, and two shift forks promote two clamp splice movements.

To the utility model discloses technical scheme's preferred, put department embedding uide bushing in the center of ring flange, the pull rod inserts in the uide bushing and slides.

Preferably, the turning parts of the two shifting forks are embedded with bushings, the groove walls of the two shifting fork guide grooves on the clamp body are respectively provided with pin holes, and the two shifting forks are respectively arranged in the two shifting fork guide grooves on the clamp body through the inner holes of the bushings, the pin holes and the pins in a rotating manner; the inner hole is in clearance fit with the pin.

To the utility model discloses technical scheme's preferred, clearance fit between the outer wall of tie rod head portion and the inner wall of center round hole.

The utility model has the advantages that:

according to the clamp, the cylinder pull rod on the lathe spindle is used for driving the pull rod to move, the shifting fork swings to push the V-shaped clamping blocks sliding in an involutory mode to clamp a workpiece to be machined, the workpiece to be machined is clamped while centering is achieved, the clamp is reliable and convenient to install, and the clamping efficiency is improved.

Drawings

Fig. 1 is a first general view of a clamp (illustrating the pick shank).

Figure 2 is a first schematic view of the clamp body cut in figure 1.

Fig. 3 is a second schematic view of the clamp body cut in fig. 1 (the pick shank body is omitted from fig. 1).

Figure 4 is a schematic view of the clamp body (with the lower portion of the clamp body cut away).

FIG. 5 is a schematic view of a fork.

Fig. 6 is a schematic view of a clamp block.

Fig. 7 is a schematic view of the assembly of the tie rod and the flange.

Fig. 8 is a schematic view of a pick handle body.

Detailed Description

The technical solution of the present invention is explained in detail below, but the scope of protection of the present invention is not limited to the embodiments.

In order to make the disclosure of the present invention more comprehensible, the following description is further made in conjunction with fig. 1 to 8 and the detailed description.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

As shown in fig. 8, the shank is one of the important components of the hand-held pneumatic tool pick, and the pick shank 900 is a precision casting, which has an irregular shape and many processing procedures. In fig. 8, 901, air inlet holes, 902, main holes, 903 and a handle.

The main hole 902 has higher precision requirement, and has a matching requirement with the cylinder body during assembly, and has a matching requirement with the gas distribution original piece, and the main hole is also a main reference for subsequent processing. The main hole is machined mainly on a lathe, and the design of proper technological equipment for turning is very important.

As shown in fig. 1-3, in this embodiment, a fixture includes a flange 100, a fixture body 200, two involutory clamping blocks 300, two "L" shaped shifting forks 400 and a pull rod 120, the fixture body 200 is disposed on the flange 100, the pull rod 120 is slidably connected to the flange 100, the two involutory clamping blocks 300 are symmetrically disposed on the upper portion of the fixture body 200, and both the two shifting forks 400 are swingably disposed on the fixture body 200 and connected to the pull rod 120 for driving the two involutory clamping blocks 300 to move.

The clamp of this embodiment is designed by combining with a lathe, the clamp is connected with a lathe spindle through a flange plate 100, the other end of a clamp inner pull rod 120 is a screw rod 123, the screw rod 123 is connected with a cylinder pull rod at a spindle end of a threaded machine tool, the pull rod 120 is driven to slide left and right through the cylinder pull rod at the spindle end of the machine tool, a pull rod head 121 moves left and right to push two shifting forks 400 to swing, the two shifting forks push two clamping blocks 300 to move, and a V-shaped jaw of the two clamping blocks clamps the outer cylindrical surface of a main hole 902 to be processed of a pneumatic pick handle body.

As shown in fig. 4, the chuck body 200 includes a disk-shaped substrate 210 and a chuck body 220 disposed on the substrate 210, the flange 100 is attached to the back surface of the substrate 210, the bottom of the chuck body 220 is attached to the front surface of the substrate 210, and the lower portion of the chuck body 220 is integrated with the substrate 210.

The top of the fixture body 220 is concavely provided with a sliding groove 221 with a rectangular cross section, the two clamping blocks 300 are arranged in the sliding groove 221 and can slide under the guidance of the sliding groove 221, and two ends of the sliding groove 221 are communicated with the fixture body 220.

An arc groove 225 is concavely arranged in the middle of the bottom of the sliding groove 221, the arc groove 225 is used for accommodating part of the pneumatic pick handle body 900, the diameter of the arc groove 225 is slightly larger than the diameter of the outer wall of a main hole 902 on the pneumatic pick handle body 900, and the depth is suitable for installation without interference of the handle body.

As shown in FIG. 3, a pressing plate 304 is disposed on both side groove walls 222 at both ends of the slot of the sliding groove 221.

As shown in fig. 2 and 4, a sinking groove 223 is vertically formed on the clamp body 220, and the width of the sinking groove 223 is greater than that of the handle portion of the pick handle body 900. The sinking groove 223 is crosswise arranged with the sliding groove 221, the notch of the sinking groove 223 is communicated with the groove bottom of the arc groove 225, and two ends of the sinking groove 223 are communicated with the clamp body 220; a shifting fork guide groove 226 for mounting a shifting fork 400 is concavely arranged at the groove bottom at the two ends of the sliding groove 221; the center of the back of the substrate 210 is provided with a center circular hole 211 for positioning, and the orifice of the center circular hole 211 is matched with the outer wall of the boss of the guide sleeve 110 for positioning to ensure that the center of the clamp body is concentric with the flange plate. The central circular hole 211 is also in clearance fit with the outer wall of the tie rod head 121 at the end of the tie rod 120.

As shown in fig. 1, 2 and 3, when the air pick handle 900 to be processed needs to use the positioning plate 601, the pre-positioning block 602 and the supporting plate 603 are only used for pre-limiting after the handle is placed in the fixture.

The positioning plate 601 is installed at the center position of the sinking groove bottom surface 224 of the sinking groove 223 on the clamp body 220. When the air pick handle 900 is installed, the positioning plate 601 is in contact with the arc-shaped back surface of the handle body handle 903 and is used for limiting the axial position of the handle body.

The pre-positioning block 602 is mounted on the fixture body 220 at a position corresponding to the outer wall of the handle air inlet 901, a supporting plate 603 for supporting the pick handle 900 is mounted on one side of the fixture body 220, and the pre-positioning block 602 and the supporting plate 603 are only used for pre-limiting after the handle is placed in the fixture.

As shown in fig. 2 and 5, the two L-shaped forks 400 are rotatably disposed in the two fork guide grooves 226 of the clamp body 220 at their respective corners by means of pins 405; the turning parts of the two shifting forks 400 are embedded with bushings 403, pin holes 227 are formed in the groove walls of the two shifting fork guide grooves 226 on the clamp body 220, and the two shifting forks 400 are rotatably arranged in the two shifting fork guide grooves 226 on the clamp body 220 through inner holes 402 of the bushings 403, the pin holes 227 and pins 405; the inner bore 402 is a clearance fit with the pin 405.

As shown in fig. 2 and 5, the fork heads 401 at one ends of the two "L" -shaped forks 400 are cylindrical, the fork heads 401 of the two forks 400 are respectively inserted into the fork notches 303 of the two clamping blocks 300, the diameters of the fork heads 401 are matched with the fork notches 303, and the fork heads 401 and the fork notches 303 are in clearance fit.

As shown in fig. 2 and 5, the fork legs 404 of the other ends of the two "L" -shaped forks 400 are cylindrical, and both fork legs 404 are inserted into the ring grooves in the tie bar 120.

The air cylinder pull rod at the main shaft end of the machine tool drives the pull rod 120 to slide left and right, the pull rod head 121 moves left and right to push the two shifting forks 400 to swing, the two shifting forks push the two clamping blocks 300 to move, and the V-shaped jaws of the two clamping blocks clamp the outer cylindrical surface of the main hole 902 to be processed of the air pick handle body 900.

As shown in fig. 2 and 6, one end of each of the two clamping blocks 300 is provided with a V-shaped jaw 301, the two clamping blocks 300 are symmetrically arranged in the sliding groove 221 of the clamp body 220, and the V-shaped jaws 301 on the two clamping blocks 300 are oppositely arranged for clamping a workpiece; concave guide notches are arranged at the edges of two sides of the upper surface of the clamping block 300, and the upper guide surfaces 302 of the four guide notches are respectively in sliding fit with the lower surfaces of the four pressing plates 304; the two clamping blocks 300 are provided with shifting fork notches 303 for inserting shifting fork heads 401.

As shown in fig. 2 and 7, the guide sleeve 110 is embedded in the center of the flange 100, the pull rod 120 is inserted into the guide sleeve 110 and slides, the pull rod head 121 at one end of the pull rod 120 extends into the central circular hole 211, and the outer wall of the pull rod head 121 is in clearance fit with the inner wall of the central circular hole 211. The tie rod head 121 is provided with a ring groove 122 for inserting the two fork legs 404.

The utility model discloses well anchor clamps combines the lathe design, and anchor clamps pass through ring flange 100 and lathe spindle connection, and the other end of anchor clamps inner pull rod 120 is the screw rod, and the cylinder pull rod of lathe main shaft end is connected to the screw rod, and the cylinder pull rod through lathe main shaft end drives pull rod 120 along the horizontal slip, and the removal is controlled to pull rod head 121 and is promoted two shift fork 400 swings, and two shift forks promote two clamp splice 300 actions.

As shown in fig. 1, 2 and 3, the pick handle 900 is mounted on the fixing device of the embodiment, specifically, the pick handle 900 is installed in the clamp body 220, and the handle 903 on the pick handle 900 contacts the positioning plate 601 to define the axial position of the handle; a pre-positioning block 602 is arranged on the clamp body 220 at a position corresponding to the outer wall of the handle air inlet 901, a supporting plate 603 for supporting the air pick handle 900 is arranged on one side of the clamp body 220, and the pre-positioning block 602 and the supporting plate 603 are only used for pre-limiting after the handle is placed in the clamp.

The overall structure of the clamp of the embodiment is illustrated as follows:

the two involutory clamping blocks 300 are arranged in the sliding grooves 221 of the clamp body 200; the bend of the L-shaped fork 400 is in clearance fit with the pin 405 on the clamp body 200 through the inner hole 402. A shifting fork head 401 at one end of the shifting fork 400 is inserted into a shifting fork notch 303 on the clamping block 300; the fork leg 404 at the other end of the fork 400 is inserted into the annular groove 122 in the tie rod head 121. The clamp body 200 is coupled to the flange 100 by screws.

The flange plate 100 of the fixture is connected with a lathe spindle through a bolt, a screw 123 of an inner pull rod 120 of the fixture is connected with a cylinder pull rod at a spindle end of a machine tool, the cylinder pull rod at the spindle end of the machine tool drives the pull rod 120 to slide left and right, a pull rod head 121 moves left and right to push two shifting forks 400 to swing, the two shifting forks push two clamping blocks 300 to move, and V-shaped jaws of the two clamping blocks clamp an outer cylindrical surface of a main hole 902 to be processed of a pneumatic pick handle body 900.

The application process of the clamp of the embodiment is as follows:

operating a cylinder pull rod (which is a conventional technology and is not described again) arranged at a main shaft end of a machine tool, pushing the cylinder pull rod to the right, driving a pull rod head part 121 to move to the right by the cylinder pull rod, pushing the two L-shaped shifting forks 400 to swing by the pull rod head part 121, and pushing the two clamping blocks 300 to move outwards by the two shifting forks; placing a pneumatic pick handle body 900 (to-be-machined piece) in the clamp body 200 as shown in fig. 3, wherein a positioning plate 601 is in contact with the arc-shaped back surface of a handle body handle 903 and is used for limiting the axial position of the handle body; at this time, the pre-positioning block 602 and the supporting plate 603 are only used for pre-limiting after the handle body is placed into the fixture.

The cylinder pull rod which is arranged at the main shaft end of the machine tool is operated to pull leftwards, the cylinder pull rod drives the pull rod head 121 to move leftwards, the pull rod head 121 pushes the two L-shaped shifting forks 400 to swing, the two shifting forks push the two clamping blocks 300 to move inwards, and the V-shaped jaws of the two clamping blocks clamp the outer cylindrical surface of the main hole 902 to be processed on the pneumatic pick handle body 900. And processing the surface to be processed by using a lathe, and performing the next action cycle after the processing is finished.

Where not otherwise indicated herein, it will be appreciated that the invention is not limited to or by the prior art, but is capable of modifications and variations as will be apparent to those skilled in the art, and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.

Claims

1. A clamp, characterized by: the clamping device comprises a flange plate (100), a clamp body (200), two oppositely-combined clamping blocks (300), two L-shaped shifting forks (400) and a pull rod (120), wherein the clamp body (200) is arranged on the flange plate (100), the pull rod (120) is connected with the flange plate (100) in a sliding mode, the two oppositely-combined clamping blocks (300) are symmetrically arranged on the upper portion of the clamp body (200), and the two shifting forks (400) are arranged on the clamp body (200) in a swinging mode and connected with the pull rod (120) to drive the two oppositely-combined clamping blocks (300) to move;

the fixture body (200) comprises a disc-shaped substrate (210) and a fixture body (220) arranged on the substrate (210), a flange plate (100) is connected to the back surface of the substrate (210), the bottom of the fixture body (220) is connected with the front surface of the substrate (210), a sliding groove (221) with a rectangular cross section is concavely arranged at the top of the fixture body (220), two ends of the sliding groove (221) are communicated with the fixture body (220), an arc groove (225) is concavely arranged at the middle position of the bottom of the sliding groove (221), and pressing plates (304) are respectively arranged on two side groove walls (222) at two ends of a notch of the sliding groove (221); a sinking groove (223) is vertically arranged on the clamp body (220), the sinking groove (223) and the sliding groove (221) are arranged in a cross manner, the notch of the sinking groove (223) is communicated with the groove bottom of the arc groove (225), and two ends of the sinking groove (223) are communicated with the clamp body (220); the groove bottoms at the two ends of the sliding groove (221) are both provided with a shifting fork guide groove (226) for mounting a shifting fork (400) in a concave manner; a central round hole (211) for positioning is arranged at the central position of the back surface of the substrate (210);

the corners of the two L-shaped shifting forks (400) are respectively and rotatably arranged in two shifting fork guide grooves (226) on the clamp body (220) through pins (405); the shifting fork heads (401) at one ends of the two L-shaped shifting forks (400) are cylindrical, the two shifting fork heads (401) are respectively inserted into the two clamping blocks (300), the shifting fork legs (404) at the other ends of the two L-shaped shifting forks (400) are cylindrical, and the two shifting fork legs (404) are respectively inserted into the pull rod (120);

one end of each clamping block (300) is provided with a V-shaped jaw (301), the two clamping blocks (300) are symmetrically arranged in a sliding groove (221) of the clamp body (220), and the V-shaped jaws (301) on the two clamping blocks (300) are oppositely arranged for clamping a workpiece; concave guide notches are arranged at the edges of two sides of the upper surface of the clamping block (300), and the upper guide surfaces (302) of the four guide notches are respectively in sliding fit with the lower surfaces of the four pressing plates (304); the two clamping blocks (300) are provided with shifting fork notches (303) for the shifting fork heads (401) to insert;

the pull rod (120) is inserted into the center of the flange plate (100) and slides, a pull rod head part (121) at one end of the pull rod (120) extends into the central round hole (211), and an annular groove (122) for inserting the two shifting fork legs (404) is formed in the pull rod head part (121).

2. The clamp according to claim 1, wherein a guide sleeve (110) is inserted at a central position of the flange (100), and the pull rod (120) is inserted into the guide sleeve (110) and slid.

3. The clamp according to claim 1, characterized in that a bush (403) is embedded at the corner of the two shifting forks (400), pin holes (227) are respectively arranged on the groove walls of the two shifting fork guide grooves (226) on the clamp body (220), and the two shifting forks (400) are respectively rotatably arranged in the two shifting fork guide grooves (226) on the clamp body (220) through an inner hole (402), the pin holes (227) and a pin (405) of the bush (403); the inner bore (402) is a clearance fit with the pin (405).

4. The clamp of claim 1, wherein the outer wall of the tie rod head (121) is in clearance fit with the inner wall of the central bore (211).