阅读说明：本技术 机械式精准直线进料结构 (Mechanical accurate linear feeding structure ) 是由 朱钧校 于 2021-07-23 设计创作，主要内容包括：本发明公开了一种机械式精准直线进料结构,它包括进料座、安装在进料座上的进料驱动机构、进料夹具组及夹具驱动机构,进料座上设有与进料座转动连接的输入轴,进料驱动机构包括传动组件以及和传动组件连接的夹具拉杆,进料夹具组包括进料夹具和锁紧夹具,进料夹具包括固定臂和进料转动臂,固定臂和进料转动臂相互交叉,固定臂与夹具拉杆固定连接,进料转动臂和夹具拉杆转动连接,锁紧夹具包括锁紧座以及锁紧转动臂,锁紧座上设有短轴,锁紧转动臂与短轴转动连接,在固定臂和进料转动臂之间、锁紧转动臂和进料座之间均设有复位簧。本发明得到的机械式精准直线进料结构,进料夹具对线料的夹持稳定可靠,保证了进料稳定以及进料长度的精度。(The invention discloses a mechanical accurate linear feeding structure, which comprises a feeding seat, a feeding driving mechanism, a feeding clamp group and a clamp driving mechanism, wherein the feeding driving mechanism is arranged on the feeding seat, an input shaft rotationally connected with the feeding seat is arranged on the feeding seat, the feeding driving mechanism comprises a transmission assembly and a clamp pull rod connected with the transmission assembly, the feeding clamp group comprises a feeding clamp and a locking clamp, the feeding clamp comprises a fixed arm and a feeding rotating arm, the fixed arm and the feeding rotating arm are mutually crossed, the fixed arm is fixedly connected with the clamp pull rod, the feeding rotating arm is rotationally connected with the clamp pull rod, the locking clamp comprises a locking seat and a locking rotating arm, a short shaft is arranged on the locking seat, the locking rotating arm is rotationally connected with the short shaft, and reset springs are arranged between the fixed arm and the feeding rotating arm and between the locking rotating arm and the feeding seat. According to the mechanical accurate linear feeding structure, the feeding clamp can stably and reliably clamp the wire, and the stability of feeding and the accuracy of feeding length are ensured.)

1. A mechanical accurate linear feeding structure is characterized by comprising a feeding seat (1), a feeding driving mechanism, a feeding clamp (5) group and a clamp driving mechanism, wherein the feeding driving mechanism, the feeding clamp group and the clamp driving mechanism are installed on the feeding seat (1), an input shaft (2) rotatably connected with the feeding seat (1) is arranged on the feeding seat (1), the feeding driving mechanism comprises a transmission assembly (3) in transmission connection with the input shaft (2) and a clamp pull rod (4) connected with the transmission assembly (3), a guide hole (100) for the clamp pull rod (4) to slide in a reciprocating manner is formed in the feeding seat (1), and a feeding hole (101) is formed beside the guide hole (100); the feeding clamp (5) set comprises a feeding clamp (5) and a locking clamp (6), the feeding clamp (5) comprises a fixed arm (50) and a feeding rotating arm (51), the fixed arm (50) and the feeding rotating arm (51) are crossed, the fixed arm (50) is fixedly connected with a clamp pull rod (4), the feeding rotating arm (51) is rotatably connected with the clamp pull rod (4), the locking clamp (6) comprises a locking seat (60) fixed on a feeding seat (1) and a locking rotating arm (61) crossed with the locking seat (60), a short shaft (62) is arranged on the locking seat (60), the locking rotating arm (61) is rotatably connected with the short shaft (62), and reset springs (7) are arranged between the fixed arm (50) and the feeding rotating arm (51) and between the locking rotating arm (61) and the feeding seat (1); anchor clamps actuating mechanism includes that drive mechanism (8), anchor clamps drive cam (9) and feeding press from both sides lever (10) and locking and press from both sides lever (11), input shaft (2) and drive mechanism (8) are connected, drive mechanism (8) and anchor clamps drive cam (9) are connected, the fulcrum connection that feeding presss from both sides lever (10) and locking and press from both sides lever (11) is on feeding seat (1), anchor clamps drive cam (9) press from both sides cam (90) and locking clamp cam (91) including the feeding that the profile staggers, feeding presss from both sides lever (10) one end and feeding and presss from both sides cam (90) butt, the other end and feeding rotor arm (51) butt of feeding clamp lever (10), locking presss from both sides lever (11) one end and locking and presss from both sides cam (91) butt, and locking presss from both sides the other end and locking rotor arm (61) butt of lever (11).

2. The mechanical precise linear feeding structure of claim 1, wherein the transmission mechanism (8) of the fixture driving mechanism comprises a driving gear (80) connected with the input shaft (2) and a driven gear (81) in fit transmission with the driving gear (80), the feeding base (1) is provided with a driving shaft (12), the driven gear (81) is connected with the driving shaft (12), and the fixture driving cam (9) is connected with the driving shaft (12).

3. The mechanical precise linear feeding structure of claim 1 or 2, characterized in that the transmission assembly (3) of the feeding driving mechanism comprises a feeding cam (30), a swing rod (31), a feeding rocker arm (32) and a connecting rod (33), the feeding cam (30) is in transmission connection with the input shaft (2), the swing rod (31) is rotatably installed on the feeding seat (1) and the end of the swing rod (31) is in butt fit with the feeding cam (30), a transmission block (34) is rotatably arranged on the swing rod (31), one end of the feeding rocker arm (32) is rotatably connected with the feeding seat (1), a transmission chute (320) which is connected and matched with the transmission block (34) is arranged on the feeding rocker arm (32), the other end of the feeding rocker arm (32) is hinged with the connecting rod (33), and the connecting rod (33) is hinged with the clamp pull rod (4).

4. The mechanical accurate linear feeding structure of claim 3, wherein the swing rod (31) is connected with the feeding seat (1) through a rotating shaft, the swing rod (31) is provided with an adjusting seat (310), the adjusting seat (310) is provided with an adjusting groove (311) pointing to the axis of the rotating shaft, the adjusting groove (311) is internally provided with an adjusting screw (35) parallel to the adjusting groove, the adjusting screw (35) is provided with an adjusting block (36) in a threaded connection manner, the adjusting block (36) is in sliding fit with the adjusting groove (311), the adjusting block (36) is provided with a connecting shaft towards one side of the feeding rocker arm (32), and the transmission block (34) is connected with the connecting shaft in a rotating manner.

5. The mechanical precise linear feeding structure according to claim 1 or 2, wherein a pressing block (13) is arranged at one end of the feeding clamp lever (10) abutted to the feeding rotating arm (51), a roller (52) is arranged at the corresponding end of the feeding rotating arm (51), and the length of the matching surface of the pressing block (13) and the roller (52) is greater than or equal to the stroke of the clamp pull rod (4) in reciprocating sliding.

6. The mechanical precise linear feeding structure according to claim 1 or 2, wherein the ends of the feeding rotating arm (51), the fixed arm (50), the locking seat (60) and the locking rotating arm (61) are all provided with a clamping block (14), the clamping blocks (14) on the feeding rotating arm (51) and the fixed arm (50) are oppositely arranged, the clamping blocks (14) on the locking seat (60) and the locking rotating arm (61) are also oppositely arranged, and the opposite surfaces of the clamping blocks (14) are provided with U-shaped through grooves (140).

7. The mechanical precision linear feeding structure according to claim 6, wherein the locking seat (60) is provided with an adjusting chute (600), an adjusting slide block (63) is arranged in the adjusting slide groove (600), the adjusting slide block (63) can slide along the adjusting slide groove (600), a material clamping block (14) on the locking seat (60) is connected with the adjusting slide block (63), an adjusting spring (64) and a spring rod (65) are arranged between the adjusting slide block (63) and the locking seat (60), the locking seat (60) is also provided with an adjusting screw (66), an adjusting spring (64) is sleeved on the spring rod (65), one end of the adjusting spring (64) is abutted against the adjusting slide block (63), the other end of the adjusting spring (64) is connected with one end of the spring rod (65) far away from the adjusting slide block (63), the adjusting screw (66) is in threaded connection with the locking seat (60), and one end of the adjusting screw (66) penetrates through the locking seat (60) and then abuts against the end of the spring rod (65).

8. The mechanical precise linear feeding structure according to claim 1 or 2, wherein the locking clamp lever (11) is provided with an ejector screw (110), the ejector screw (110) is in threaded connection with the locking clamp lever (11), and the end of the ejector screw (110) abuts against the locking rotating arm (61).

Technical Field

The invention relates to a feeding device, in particular to a mechanical accurate linear feeding structure.

Background

Existing stamping equipment is when processing products such as bolt, the nut, round pin axle, the wire rod that generally adopts coiling in advance is as the raw materials, before carrying out stamping process, must adopt feed arrangement to send the wire rod into stamping equipment with single form and cut, feed arrangement who uses at present generally comprises the multiunit running roller, this kind of feed mechanism has good alignment effect, but because the sliding friction power between running roller and the wire rod is less, lead to the wire rod at the one instant forward stroke that the running roller stopped because of inertia during the feeding easily, lead to the inlet wire length inaccuracy, finally influence the machining precision.

Disclosure of Invention

The invention aims to solve the defects of the prior art and provide a mechanical accurate linear feeding structure with high feeding accuracy.

In order to achieve the purpose, the invention designs a mechanical accurate linear feeding structure, which comprises a feeding seat, a feeding driving mechanism, a feeding clamp group and a clamp driving mechanism, wherein the feeding driving mechanism, the feeding clamp group and the clamp driving mechanism are arranged on the feeding seat; the feeding clamp group comprises a feeding clamp and a locking clamp, the feeding clamp comprises a fixed arm and a feeding rotating arm, the fixed arm and the feeding rotating arm are crossed, the fixed arm is fixedly connected with a clamp pull rod, the feeding rotating arm is rotatably connected with the clamp pull rod, the locking clamp comprises a locking seat fixed on the feeding seat and a locking rotating arm crossed with the locking seat, the locking seat is provided with a short shaft, the locking rotating arm is rotatably connected with the short shaft, and reset springs are arranged between the fixed arm and the feeding rotating arm and between the locking rotating arm and the feeding seat; the anchor clamps actuating mechanism includes that drive mechanism, anchor clamps drive cam and feeding press from both sides lever and locking clamp lever, input shaft and drive mechanism connect, drive mechanism and anchor clamps drive cam are connected, the fulcrum connection that lever and locking clamp lever were pressed from both sides in the feeding is on the feeding seat, anchor clamps drive cam includes that the feeding that the profile staggers presss from both sides cam and locking clamp cam, the feeding presss from both sides lever one end and feeding and presss from both sides cam butt, and the feeding presss from both sides the other end and the feeding rotor arm butt of lever, locking presss from both sides lever one end and locking and presss from both sides cam butt, and the other end and the locking rotor arm butt of lever are pressed from both sides in the locking.

In order to facilitate the arrangement of the transmission mechanism, the transmission mechanism of the clamp driving mechanism comprises a driving gear connected with the input shaft and a driven gear in transmission matched with the driving gear, a driving shaft is arranged on the feeding seat, the driven gear is connected with the driving shaft, and the clamp driving cam is connected with the driving shaft.

In order to facilitate transmission, the input shaft is rotated to the gliding motion conversion of anchor clamps pull rod, feeding actuating mechanism's drive assembly includes feeding cam, pendulum rod, feeding rocking arm and connecting rod, the feeding cam is connected with the input shaft transmission, the pendulum rod is rotationally installed on the feeding seat and pendulum rod tip and feeding cam butt cooperation, rotates on the pendulum rod and is equipped with the transmission piece, feeding rocking arm one end and feeding seat rotate to be connected, are equipped with on the feeding rocking arm to be connected the complex transmission spout with the transmission piece, and the other end and the connecting rod of feeding rocking arm are articulated, and connecting rod and anchor clamps pull rod are articulated.

In order to conveniently adjust the stroke of the clamp pull rod, the swing rod is connected with the feeding seat through a rotating shaft, an adjusting seat is arranged on the swing rod, an adjusting groove pointing to the axis of the rotating shaft is formed in the adjusting seat, an adjusting screw parallel to the adjusting groove is arranged in the adjusting groove, an adjusting block is connected to the adjusting screw in a threaded mode, the adjusting block is in sliding fit with the adjusting groove, a connecting shaft is arranged on one side, facing the feeding rocker arm, of the adjusting block, and the transmission block is connected with the connecting shaft in a rotating mode.

In order to reduce the abrasion of the contact surfaces of the feeding clamp and the feeding clamp lever while keeping the feeding clamp in contact with the feeding clamp lever in the pulling process, a pressing block is arranged at one end of the feeding clamp lever, which is abutted to the feeding rotating arm, a roller is arranged at the corresponding end of the feeding rotating arm, the length of the matching surface of the pressing block and the roller is greater than or equal to the stroke of the clamp pull rod in reciprocating sliding, and when the stroke of the clamp pull rod can be adjusted through an adjusting block as above, the length of the matching surface is greater than the maximum stroke of the clamp pull rod in reciprocating sliding.

In order to avoid damage to the appearance of the wire material when the clamp is locked, the end parts of the feeding rotating arm, the fixed arm, the locking seat and the locking rotating arm are respectively provided with a material clamping block, the material clamping blocks on the feeding rotating arm and the fixed arm are oppositely arranged, the material clamping blocks on the locking seat and the locking rotating arm are also oppositely arranged, and the opposite surfaces of the material clamping blocks are respectively provided with a U-shaped through groove.

In order to conveniently adjust the clamping force and the clamping size of the locking clamp, an adjusting sliding groove is formed in the locking seat, an adjusting sliding block is arranged in the adjusting sliding groove and can slide along the adjusting sliding groove, a material clamping block on the locking seat is connected with the adjusting sliding block, an adjusting spring and a spring rod are arranged between the adjusting sliding block and the locking seat, an adjusting screw is further arranged on the locking seat, the adjusting spring is sleeved on the spring rod, one end of the adjusting spring is abutted against the adjusting sliding block, the other end of the adjusting spring is connected with one end, far away from the adjusting sliding block, of the spring rod, and the adjusting screw is screwed with the locking seat.

In order to adjust the clamping force and the clamping size of the locking clamp conveniently, a pushing screw is arranged on the locking clamp lever and is in threaded connection with the locking clamp lever, and the end part of the pushing screw abuts against the locking rotating arm.

The mechanical accurate linear feeding structure obtained by the invention realizes intermittent pulling of the wire material through the alternate locking of the locking clamp and the feeding clamp and the reciprocating motion of the feeding clamp along with the clamp pull rod.

Drawings

FIG. 1 is a front view of a mechanical precision linear feed structure embodiment 1 of the present invention;

FIG. 2 is a plan view of embodiment 1;

FIG. 3 is a schematic view showing a fitting structure of a jig driving mechanism and two jigs in embodiment 1;

FIG. 4 is a perspective view of a mechanical precision linear feed structure embodiment 2 of the present invention;

FIG. 5 is a schematic structural view of a connecting portion of a feeding rocker arm and a swing link in embodiment 2;

FIG. 6 is an enlarged schematic view at A in FIG. 5;

FIG. 7 is a top view of a mechanical precision linear feed structure embodiment 3 of the present invention;

FIG. 8 is a schematic view showing a fitting structure of a jig driving mechanism and two jigs in embodiment 3;

fig. 9 is a perspective sectional view of the locking jig in embodiment 3.

In the figure: the feeding device comprises a feeding seat 1, an input shaft 2, a transmission assembly 3, a clamp pull rod 4, a feeding clamp 5, a locking clamp 6, a return spring 7, a transmission mechanism 8, a clamp driving cam 9, a feeding clamp lever 10, a locking clamp lever 11, a driving shaft 12, a pressing block 13, a clamping block 14, a feeding cam 30, a swing rod 31, a feeding rocker arm 32, a connecting rod 33, a transmission block 34, an adjusting screw 35, an adjusting block 36, a fixed arm 50, a feeding rotating arm 51, a roller 52, a locking seat 60, a locking rotating arm 61, a short shaft 62, an adjusting slide block 63, an adjusting spring 64, a spring rod 65, an adjusting screw 66, a driving gear 80, a driven gear 81, a feeding clamp cam 90, a locking clamp cam 91, a guide hole 100, a feeding hole 101, a pushing screw 110, a U-shaped through groove 140, an adjusting seat 310, an adjusting groove 311, a transmission sliding groove 320 and an adjusting sliding groove 600.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.

Example 1:

the mechanical precise linear feeding structure described in this embodiment, as shown in fig. 1, fig. 2, and fig. 3, includes a feeding base 1, a feeding driving mechanism installed on the feeding base 1, a feeding clamp 5 set, and a clamp driving mechanism, where the feeding base 1 is provided with an input shaft 2 rotatably connected to the feeding base 1, the feeding driving mechanism includes a transmission assembly 3 in transmission connection with the input shaft 2 and a clamp pull rod 4 connected to the transmission assembly 3, the feeding base 1 is provided with a guide hole 100 for the clamp pull rod 4 to slide back and forth, and a feeding port 101 is provided beside the guide hole 100; the feeding clamp 5 group comprises a feeding clamp 5 and a locking clamp 6, the feeding clamp 5 comprises a fixed arm 50 and a feeding rotating arm 51, the fixed arm 50 and the feeding rotating arm 51 are crossed, the fixed arm 50 is fixedly connected with a clamp pull rod 4, the feeding rotating arm 51 is rotatably connected with the clamp pull rod 4, the locking clamp 6 comprises a locking seat 60 fixed on the feeding seat 1 and a locking rotating arm 61 crossed with the locking seat 60, the locking seat 60 is provided with a short shaft 62, the locking rotating arm 61 is rotatably connected with the short shaft 62, and reset springs 7 are arranged between the fixed arm 50 and the feeding rotating arm 51 and between the locking rotating arm 61 and the feeding seat 1; anchor clamps actuating mechanism includes that drive mechanism 8, anchor clamps actuating cam 9 and feeding press from both sides lever 10 and locking press from both sides lever 11, input shaft 2 and drive mechanism 8 are connected, drive mechanism 8 and anchor clamps actuating cam 9 are connected, the feeding presss from both sides lever 10 and locking and presss from both sides the fulcrum connection of lever 11 on feeding seat 1, anchor clamps actuating cam 9 includes that the feeding that the profile staggers presss from both sides cam 90 and locking and presss from both sides cam 91, feeding presss from both sides lever 10 one end and feeding and presss from both sides cam 90 butt, and the feeding presss from both sides the other end and feeding pivoted arm 51 butt of lever 10, locking presss from both sides 11 one end and locking and presss from both sides cam 91 butt, and locking presss from both sides the other end and the locking pivoted arm 61 butt of lever 11.

In order to adjust the clamping force and the clamping size of the locking clamp conveniently, as shown in fig. 3, a pushing screw 110 is arranged on the locking clamp lever 11, the pushing screw 110 is in threaded connection with the locking clamp lever 11, and the end of the pushing screw 110 abuts against the locking rotating arm 61.

In the actual working process, external power is input through the input shaft 2 to drive the feeding driving mechanism and the clamp driving mechanism, the transmission assembly 3 of the feeding driving mechanism converts the rotation of the input shaft 2 into the reciprocating motion of the clamp pull rod 4 along the guide hole 100, meanwhile, the transmission mechanism 8 of the clamp driving mechanism transmits the power of the input shaft 2 to the clamp driving cam 9, the clamp driving cam 9 pries the feeding clamp lever 10 and the locking clamp lever 11, the two levers respectively drive the feeding rotating arm 51 and the locking rotating arm 61 to rotate, and the clamping and releasing of the feeding clamp 5 and the locking clamp 6 are realized by matching with the return spring 7, in the embodiment, the staggered profiles of the feeding clamp cam 90 and the locking clamp cam 91 mean that opposite profiles are adopted, that is, the pushing stroke of the feeding clamp cam 90 corresponds to the return stroke of the locking clamp cam 91, for example, when the feeding clamp cam 90 is located at the pushing stroke, after the feeding clamp lever 10 is pushed by the feeding clamp cam 90, the feeding rotating arm 51 is pushed to rotate around the clamp pull rod 4, so that the feeding clamp 5 is clamped by overcoming the elastic force of the reset spring 7, meanwhile, as the locking clamp cam 91 is positioned in the return stroke, the cam gradually loosens the pushing of the locking clamp lever 11, so that the locking rotating arm 61 of the locking clamp 6 which is originally clamped is loosened under the elastic force action of the reset spring 7 of the locking clamp 6, and thus the alternative clamping loosening of the feeding clamp 5 and the locking clamp 6 is realized; during feeding, when the clamp pull rod 4 slides towards the feed inlet 101, the feeding clamp 5 is loosened to clamp gradually, finally, at the tail end of the stroke, the feeding clamp 5 clamps the wire entering from the feed inlet 101, in the sliding process, the locking clamp 6 is loosened simultaneously, when the feeding clamp 5 clamps the wire to move towards the locking clamp 6 along with the clamp pull rod 4, namely, when the feeding clamp 5 moves reversely, the feeding clamp 5 is loosened gradually, the locking clamp 6 clamps the wire sent by the feeding clamp 5 gradually, so that subsequent cutting is performed, the feeding clamp 5 is loosened completely when the locking clamp 6 is completely clamped, the wire moves towards the feed inlet 101 again under the pulling of the clamp pull rod 4, and the process is repeated, so that the wire can be pulled.

In the drawings of the present specification, only a part of the rotary connection and support structure between the input shaft 2 and the feeding base 1 is shown, it should be understood that the drawings of the present specification do not limit the connection relationship between the input shaft 2 and the feeding base 1, and meanwhile, the connection structure between the shaft and the frame is a common structure, and need not be shown and described in detail in the specification.

The accurate straight line feeding structure of mechanical type that this embodiment provided, through locking clamp 6 and feeding clamp 5's locking in turn and feeding clamp 5 along with anchor clamps pull rod 4's reciprocating motion, the mode of simulation staff pulling rope has realized the intermittent type formula pulling to the line material, this feeding mode is different with prior art, the feeding volume is decided by feeding clamp 5's motion stroke, feeding clamp 5 is reliable and stable to the centre gripping of line material, guaranteed the feeding stable and the precision of feeding length.

Example 2:

the accurate straight line feeding structure of mechanical type that this embodiment describes, as shown in fig. 4, except embodiment 1 the characteristic, in order to make things convenient for the transmission, realize that input shaft 2 rotates the gliding motion conversion of anchor clamps pull rod 4, feeding actuating mechanism's drive assembly 3 includes feeding cam 30, pendulum rod 31, feeding rocking arm 32 and connecting rod 33, feeding cam 30 is connected with input shaft 2 transmission, pendulum rod 31 rotationally installs on feeding seat 1 and the cooperation of pendulum rod 31 tip and feeding cam 30 butt, rotates on the pendulum rod 31 and is equipped with transmission block 34, feeding rocking arm 32 one end and feeding seat 1 rotate to be connected, are equipped with on the feeding rocking arm 32 to be connected the complex transmission spout 320 with transmission block 34, and feeding rocking arm 32's the other end is articulated with connecting rod 33, and connecting rod 33 and anchor clamps pull rod 4 are articulated.

In order to adjust the stroke of the clamp pull rod 4 conveniently, as shown in fig. 5 and 6, the swing rod 31 is connected with the feeding seat 1 through a rotating shaft, an adjusting seat 310 is arranged on the swing rod 31, an adjusting groove 311 pointing to the axis of the rotating shaft is arranged on the adjusting seat 310, an adjusting screw 35 parallel to the adjusting groove is arranged in the adjusting groove 311, an adjusting block 36 is connected to the adjusting screw 35 through a thread, the adjusting block 36 is in sliding fit with the adjusting groove 311, a connecting shaft is arranged on one side of the adjusting block 36 facing the feeding rocker arm 32, and the transmission block 34 is rotatably connected with the connecting shaft.

The accurate straight line feeding structure of mechanical type that this embodiment provided, in the actual work process, through adjusting screw 35, can adjust the distance of 36 relative pivots of regulating block to change the feeding rocking arm 32 and for its and the distance of feeding seat 1 junction, change feeding cam 30 swing angle of feeding rocking arm 32 when rotating, reach and change 4 stroke effects of anchor clamps pull rod, finally realize the adjustment to feeding length.

Example 3:

the present embodiment describes a mechanical precision linear feeding structure, as shown in fig. 7, in addition to the features described in embodiment 2, in order to facilitate the setting of the transmission mechanism 8, the transmission mechanism 8 of the fixture driving mechanism includes a driving gear 80 connected to the input shaft 2 and a driven gear 81 engaged with the driving gear 80 for transmission, the feeding base 1 is provided with a driving shaft 12, the driven gear 81 is connected to the driving shaft 12, and the fixture driving cam 9 is connected to the driving shaft 12.

In order to reduce the wear of the contact surface of the feeding clamp lever 10 and the feeding clamp lever 10 while keeping the contact with the feeding clamp lever in the process of pulling the feeding clamp 5, as shown in fig. 8, a pressing block 13 is arranged at one end of the feeding clamp lever 10 abutting against the feeding rotating arm 51, a roller 52 is arranged at the corresponding end of the feeding rotating arm 51, the length of the matching surface of the pressing block 13 and the roller 52 is greater than or equal to the stroke of the clamp pull rod 4 in reciprocating sliding, and the length of the matching surface is greater than or equal to the maximum stroke of the clamp pull rod 4 in reciprocating sliding.

In order to avoid damaging the shape of the wire when the clamp is locked, as shown in fig. 8 and 9, the end portions of the feeding rotating arm 51, the fixed arm 50, the locking seat 60 and the locking rotating arm 61 are all provided with the clamping blocks 14, the clamping blocks 14 on the feeding rotating arm 51 and the fixed arm 50 are oppositely arranged, the clamping blocks 14 on the locking seat 60 and the locking rotating arm 61 are also oppositely arranged, and the opposite surfaces of each clamping block 14 are provided with the U-shaped through grooves 140.

In order to adjust the clamping force and the clamping size of the locking clamp conveniently, as shown in fig. 8 and 9, an adjusting sliding groove 600 is arranged on the locking seat 60, an adjusting sliding block 63 is arranged in the adjusting sliding groove 600, the adjusting sliding block 63 can slide along the adjusting sliding groove 600, a clamping block 14 on the locking seat 60 is connected with the adjusting sliding block 63, an adjusting spring 64 and a spring rod 65 are arranged between the adjusting sliding block 63 and the locking seat 60, an adjusting screw 66 is further arranged on the locking seat 60, the adjusting spring 64 is sleeved on the spring rod 65, one end of the adjusting spring 64 abuts against the adjusting sliding block 63, the other end of the adjusting spring 64 is connected with one end of the spring rod 65 far away from the adjusting sliding block 63, the adjusting screw 66 is in threaded connection with the locking seat 60, and one end of the adjusting screw 66 abuts against the end of the spring rod 65 after passing through the locking seat 60.

Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.