CN218216055U - Pneumatic four-mandrel press - Google Patents

Abstract

The utility model discloses a pneumatic four-mandrel press-connection machine, which comprises a press-connection machine shell, wherein a press-connection component, a gear adjusting component and a pneumatic component are arranged in the press-connection machine shell, the press-connection component comprises a clamp handle and a clamp shaft which are mutually matched, the lower end of the clamp handle is provided with a movable hole, and the head part of the clamp shaft is arranged in the movable hole; the pneumatic assembly comprises a force multiplying cylinder, and the force multiplying cylinder is connected with the upper end of the clamp handle through a connecting rod and drives the clamp handle to rotate relative to the clamp shaft; the gear adjusting assembly comprises an adjusting screw and an adjusting block, the adjusting block is in threaded fit with the adjusting screw, and the tail of the clamp shaft is fixedly connected with the adjusting block; the adjusting screw rod drives the clamp shaft to rotate relative to the clamp handle through the adjusting block, and the relative position of the head of the clamp shaft and the movable hole is adjusted. The utility model discloses utilize adjusting screw to change the initial position of pincers axle on the pincers handle for the initial position of the epaxial pincers tooth of pincers changes, satisfies the crimping demand of the wire of different thicknesses.

Description

Pneumatic four-mandrel press

Technical Field

The utility model relates to a crimping tool technical field, in particular to pneumatic four dabber crimping machines.

Background

The electrical connector consists of a fixed end electrical connector, i.e., a female contact (referred to as a socket for short), and a free end electrical connector, i.e., a male contact (referred to as a plug for short). The socket is fixed on the electric part through a square (round) plate (a welding mode is adopted individually), the plug is generally connected with a conducting wire, and the connection of the plug and the socket is realized through a connecting nut. The plug terminal and the lead are fixed by a crimping tool, the round-tube-shaped terminal is placed in a pressing block of the crimping tool, then the lead is placed in the terminal, and the pressing block extrudes a concave point inwards from the round tube of the terminal, so that the plug terminal and the lead are connected together. Crimping tools generally include manual crimping tools and pneumatic crimping tools, the manual crimping tools are labor-consuming to use, the pneumatic crimping tools push the push block assembly to perform crimping work by using the air cylinder, the thickness range of wires to be crimped by conventional crimping tools is small, and therefore when wires and terminals with different thicknesses need to be pressed, crimping tools with different specifications need to be prepared, the sizes correspond to the specifications one to one, and equipment cost is greatly increased.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a but not unidimensional wire, terminal of quick crimping, pneumatic four-core shaft crimping machine that crimping reliability is high.

Therefore, the technical scheme of the utility model is that: the pneumatic four-mandrel press-connection machine comprises a press-connection machine shell, wherein a press-connection assembly, a gear adjusting assembly and a pneumatic assembly are arranged in the press-connection machine shell, the press-connection assembly comprises a clamp handle and a clamp shaft which are matched with each other, a movable hole is formed in the lower end of the clamp handle, and the head of the clamp shaft is arranged in the movable hole; the pneumatic assembly comprises a force multiplying cylinder, and the force multiplying cylinder is connected with the upper end of the clamp handle through a connecting rod and drives the clamp handle to rotate relative to the clamp shaft; the gear adjusting assembly comprises an adjusting screw and an adjusting block, the adjusting block is in threaded fit with the adjusting screw, and the tail of the clamp shaft is fixedly connected with the adjusting block; the adjusting screw rod drives the clamp shaft to rotate relative to the clamp handle through the adjusting block, and the relative position of the head of the clamp shaft and the movable hole is adjusted.

In the initial state, a cylinder rod of the double-force cylinder extends outwards, a clamp handle inclines outwards, and a crimping position of the head of the clamp shaft is in a non-crimping state, namely each clamp tooth is in a contraction state; when the clamp is in work, the positioner is arranged on the crimping position of the head of the clamp shaft, and the terminal is inserted into the crimping hole of the head of the clamp shaft through the positioner; then the boosting cylinder is ventilated, the cylinder rod is contracted inwards to drive the clamp handle to rotate inwards, the clamp handle and the clamp shaft rotate relatively, and clamp teeth in the clamp shaft start to be connected with the terminal in a crimping mode. Be equipped with the screw hole on the regulating block, rotate adjusting screw, can drive the regulating block and rotate along adjusting screw, and the pincers axle afterbody is fixed on the regulating block, remove along with the regulating block, and the pincers axle afterbody removes, make the relative pincers handle of pincers axle head take place to rotate, just also initial position between them has changed, the pincers axle has rotated an angle A in advance, and pincers handle atress multiple cylinder drive pivoted angle B, pincers handle and the relative turned angle of pincers axle are B +/-A, and B is the definite value, A is decided by adjusting screw, thereby make the change that the crimping degree of depth of pincers axle takes place, satisfy the crimping demand of unidimensional conductor wire terminal not.

Preferably, the gear adjusting assembly further comprises an adjusting knob, a pointer and a dial, the adjusting knob is fixed to the end portion of the adjusting screw, the pointer is installed on the adjusting block, the dial is fixed to the shell of the crimping machine, and the pointer and the scale on the dial are matched to work. The adjusting knob is rotated to drive the adjusting screw rod to rotate, the adjusting block drives the tail of the clamp handle and the pointer to move synchronously, the pointer can point to the scale on the dial, the crimping depth is adjusted quantitatively through the scale, and the wire terminals with different thicknesses can be conveniently crimped.

Preferably, a positioning disc is arranged on the inner side of the adjusting knob and fixed on the shell of the crimping machine; the middle of the positioning disc is provided with a through hole, one side of the positioning disc, which faces the adjusting knob, is provided with four positioning grooves distributed in a cross shape, the adjusting knob comprises an adjusting end and a connecting end, the connecting end extends into the shell of the crimping machine through the through hole of the positioning disc, the connecting end is provided with a positioning pin, and the positioning pin can be clamped into any positioning groove; the connecting end of the adjusting knob is of a hollow structure, the end part of the adjusting screw rod is arranged inside the connecting end, the adjusting screw rod and the connecting end are connected through a cylindrical pin, and the adjusting screw rod is matched with the cylindrical pin through a long slot hole; and a second spring is arranged on the outer side of the connecting end of the adjusting knob, one end of the second spring is abutted against the cylindrical pin, and the other end of the second spring is abutted against the inner side of the shell of the crimping machine. Under a normal state, the second spring acts on the cylindrical pin, so that the positioning pin of the adjusting knob can be clamped into the positioning groove of the positioning disc, and the adjusting knob cannot rotate; when adjusting screw needs to be rotated, outwards extract adjusting knob, make the locating pin break away from the constant head tank of positioning disk, when rotating, adjusting knob rotates 90 every time, adjusting screw corresponds regulation 0.1mm, gear adjustment 0.1mm promptly, rotate adjusting knob according to the gear demand, rotate the back that targets in place, loosen adjusting knob, adjusting knob moves towards the positioning disk under the effect of second spring, make the locating pin block again in the constant head tank of positioning disk, accomplish gear adjustment work.

Preferably, one side of the clamp handle, which faces the force multiplying cylinder, is provided with a push rod, a travel switch is arranged between the clamp handle and the force multiplying cylinder, the force multiplying cylinder drives the clamp handle to rotate to a compression joint state, and the push rod and the travel switch are mutually abutted. In the initial state, the clamp handle inclines towards one side away from the power doubling cylinder, the ejector rod is away from the travel switch, when the power doubling cylinder drives the clamp handle to rotate inwards, the ejector rod can be abutted against the travel switch, the condition that the clamp handle rotates to the bottom at the moment is shown, the clamp shaft is in place in a compression joint mode, the travel switch is triggered by the ejector rod to send a place signal, and then the power doubling cylinder drives the clamp handle to reset to return to the initial state.

Preferably, a limiting block is arranged below the clamp handle, a limiting plane is arranged at the end part of the clamp handle close to one side of the power doubling cylinder, the power doubling cylinder drives the clamp handle to rotate to a crimping state, and the limiting plane at the bottom of the clamp handle is abutted to the limiting block. In the initial state, the bottom of the clamp handle is not in contact with the limiting block, and along with the rotation of the clamp handle, the limiting plane at the bottom of the clamp handle is abutted to the upper end of the limiting block in a laminating manner, so that the clamp handle cannot continue to rotate, and the clamp handle rotates in place.

Preferably, the axle center of the clamp shaft is provided with a crimping hole, the clamp shaft is provided with four mounting holes which are arranged in a cross shape, the center where the mounting holes intersect is the crimping hole, each mounting hole is internally provided with a clamp tooth, the front end of each clamp tooth extends into the crimping hole of the clamp shaft, and the rear end of each clamp tooth is abutted against the movable hole of the clamp handle.

Preferably, the edge of the movable hole of the clamp handle is uniformly divided into four crimping track surfaces, and the distances from each point on each crimping track surface to the circle center are different; the rear ends of the forceps teeth abut against the crimping track surface of the forceps handle, when the forceps handle rotates, the forceps teeth move in the mounting hole of the forceps shaft under the action of the crimping track surface, and the front ends of the forceps teeth move oppositely in the crimping hole. The crimping track surface is provided with a starting position, the starting position is farthest away from the circle center, then the crimping track surface slowly inclines inwards, and the distance from each point to the circle center is gradually reduced.

Preferably, the first spring is sleeved on the forceps teeth, one end of the first spring abuts against the inner wall of the mounting hole, the other end of the first spring abuts against the tail end of the forceps teeth, and the tail end of the forceps teeth is tightly attached to the crimping track surface of the forceps handle.

The front ends of the forceps teeth are crimping parts, the rear ends of the forceps teeth are abutted against a crimping track surface of the forceps handle, and because distances from points on the crimping track surface of the forceps handle to a circle center are different, when the forceps handle rotates, the positions of the forceps teeth, which are abutted against the crimping track surface, are changed, so that the four forceps teeth synchronously move to the center, and the crimping parts at the front ends of the forceps teeth crimp the terminal; the adjusting screw can change the initial position of the clamp shaft, so that when the clamp handle is not compressed, the pressing part of the clamp teeth moves a certain distance to the center in advance, the small-size terminal is conveniently placed, then the force multiplying cylinder drives the clamp handle to rotate, and the pressing part of the clamp teeth is pressed on the small-size terminal to complete the pressing work; the adjusting screw rod is rotated, terminals with different sizes can be placed in the crimping holes, and the clamp teeth move towards the center along with the rotation of the clamp handle to complete the crimping work.

Compared with the prior art, the beneficial effects of the utility model are that: the initial position of the clamp shaft on the clamp handle is changed by using the adjusting screw rod, so that the initial position of the clamp teeth on the clamp shaft is changed, and the crimping requirements of wires with different thicknesses and terminals with different sizes are met; the gears can be continuously adjusted by utilizing the screw, the adjustment precision of the gears is 0.1mm, the gears are adjusted by 0.1mm when the adjusting knob rotates by 90 degrees, quantitative and accurate adjustment is realized, and the crimping precision is higher; the clamp shaft and the pointer move synchronously, the position of the clamp shaft is accurately adjusted by using the pointer and the dial, terminals with different sizes are accurately crimped, and the application range is wide.

Drawings

The following detailed description will be given with reference to the accompanying drawings and embodiments of the present invention

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a schematic view of the installation of the clamp shaft of the present invention;

FIG. 3 is a schematic structural view of the gear adjustment assembly of the present invention;

FIG. 4 is a sectional view of the adjusting knob of the present invention;

FIG. 5 is a schematic view of the structure of the present invention in the initial state;

FIG. 6 is an enlarged view of a portion of FIG. 5;

fig. 7 is a schematic structural view of the crimping state of the present invention.

Labeled in the figure as: the hydraulic press comprises a press machine shell 1, a gear adjusting component 2, an adjusting screw 21, an adjusting block 22, an adjusting knob 23, a pointer 24, a dial 25, a positioning disc 26, a positioning groove 27, a positioning pin 28, a cylindrical pin 29, a slotted hole 210, a second spring 211, a pneumatic component 3, a double-force cylinder 31, an adjusting valve 32, a cylinder rod 33, a connecting rod 34, a clamp handle 4, a movable hole 41, an ejector rod 42, a limiting plane 43, a limiting block 44, a press trace surface 45, a clamp shaft 5, a press connection hole 51, a mounting hole 52, a clamp tooth 53, a clamp shaft tail part 54 and a travel switch 6.

Detailed Description

In the description of the present invention, it should be noted that, for the orientation words, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and the positional relationship are indicated based on the orientation or the positional relationship shown in the drawings, and the description is only for convenience of describing the present invention and simplifying the description, but not for indicating or implying that the device or the element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present invention.

Furthermore, if any, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features. Thus, the definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features, and "a plurality" or "a plurality" in the description of the invention means two or more unless a specific definition is explicitly provided.

See the drawings. The pneumatic four-mandrel press comprises a press shell 1, wherein a press component, a gear adjusting component 2 and a pneumatic component 3 are arranged in the press shell, the pneumatic component 3 comprises a power doubling cylinder 31, an adjusting valve 32 and other gas path components, a cylinder rod 33 of the power doubling cylinder 31 is in an extending state initially and retracts inwards in working.

The crimping component comprises a clamp handle 4 and a clamp shaft 5 which are matched with each other, the upper end of the clamp handle 4 is rotationally connected with a cylinder rod 33 of the double-force cylinder 31 through a connecting rod 34, and both ends of the connecting rod 34 are rotationally connected; the lower end of the clamp handle 4 is provided with a movable hole 41, the head of the clamp shaft 5 is arranged in the movable hole 41, and the multiplying cylinder drives the clamp handle to rotate relative to the clamp shaft through a connecting rod.

The side, facing the force multiplying cylinder 31, of the clamp handle 4 is provided with an ejector rod 42, a travel switch 6 is arranged between the clamp handle and the force multiplying cylinder, the force multiplying cylinder drives the clamp handle to rotate to a compression joint state, and the ejector rod 42 and the travel switch 6 mutually abut against each other. In the initial state, the clamp handle 4 inclines towards one side away from the force doubling cylinder, the ejector rod 42 is away from the travel switch 6, when the force doubling cylinder 31 drives the clamp handle 4 to rotate inwards, the ejector rod 42 can be abutted against the travel switch 6, the condition that the clamp handle rotates to the bottom at the moment is shown, the clamp shaft is in compression joint in place, the travel switch is triggered by the ejector rod to send a signal in place, and the force doubling cylinder drives the clamp handle to reset to return to the initial state.

A limiting block 44 is arranged below the clamp handle 4, a limiting plane 43 is arranged at the end part of one side, close to the power doubling cylinder, of the clamp handle, the power doubling cylinder 31 drives the clamp handle 4 to rotate to a crimping state, and the limiting plane 43 at the bottom of the clamp handle is abutted to the limiting block 44. At the initial state, the bottom of the forceps handle is not in contact with the limiting block, and along with the rotation of the forceps handle, the limiting plane at the bottom of the forceps handle is abutted to the upper end of the limiting block in a fitting manner, so that the forceps handle cannot continuously rotate, and the forceps handle rotates in place.

The axle center department of pincers axle 5 is equipped with crimping hole 51, is equipped with four mounting holes 52 that are the cross and arrange on the pincers axle 5, and the center that the mounting hole intersects is the crimping hole, is equipped with pincers tooth 53 in every mounting hole, and the pincers tooth front end stretches into the crimping hole of pincers axle, and the rear end supports at the activity downthehole side of pincers handle. The edge of the movable hole 41 of the clamp handle 4 is uniformly divided into four crimping track surfaces 45, and the distances from each point on the crimping track surfaces to the circle center are different; the clamp teeth are sleeved with first springs (not shown in the figure), one ends of the first springs are abutted against the inner wall of the mounting hole, and the other ends of the first springs are abutted against the tail ends of the clamp teeth, so that the tail ends of the clamp teeth are tightly attached to the crimping track surface of the clamp handle. When the handle 4 is rotated, the jaw teeth 53 are pressed against the tracking surface 45 and move in the mounting hole 52 of the jaw shaft, and the front ends of the jaw teeth 53 move in the pressing hole 51. The crimping track surface is provided with a starting position, the starting position is farthest away from the circle center, then the crimping track surface slowly inclines inwards, and the distance from each point to the circle center is gradually reduced.

The gear adjusting assembly 2 comprises an adjusting screw 21, an adjusting block 22, an adjusting knob 23, a pointer 24 and a dial 25, and the adjusting knob 23 is fixed at the end part of the adjusting screw 21 and can drive the adjusting screw to rotate; the adjusting block 22 is provided with a threaded hole which is in threaded fit with the adjusting screw rod 21, the two sides of the adjusting block 22 are respectively fixed with the clamp shaft tail part 54 and the pointer 24, the adjusting knob 23 is rotated to drive the adjusting screw rod 21 to rotate, so that the adjusting block 22 moves horizontally, the relative positions of the clamp shaft 5 and the clamp handle 4 are changed synchronously, the position of the pointer 24 is changed, the initial connection position of the clamp teeth 53 on the clamp shaft and the crimping track surface 45 is changed, meanwhile, the pointer 24 moves on the dial 25, points to different scales, the crimping depth is adjusted quantitatively through the scales, and crimping is conveniently carried out on thick and thin wires (corresponding to different terminal sizes).

A positioning disc 26 is arranged on the inner side of the adjusting knob 23, and the positioning disc 26 is fixed on the crimping machine shell 1; a through hole is formed in the middle of the positioning disc 26, four positioning grooves 27 distributed in a cross shape are formed in one side, facing the adjusting knob, of the positioning disc 26, the adjusting knob 23 comprises an adjusting end and a connecting end, the connecting end extends into the shell 1 of the crimping machine through the through hole of the positioning disc 26, a positioning pin 28 is arranged on the connecting end, and the positioning pin 28 can be clamped into any one positioning groove 27; the adjusting knob 23 connecting end is of a hollow structure, the end portion of the adjusting screw 21 is arranged in the connecting end, the adjusting knob 23 connecting end and the adjusting screw 21 connecting end are connected through a cylindrical pin 29, the cylindrical pin is fixed at the adjusting knob 23 connecting end, two ends of the cylindrical pin extend outwards, a long slotted hole 210 is formed in the adjusting screw 21, the cylindrical pin 29 penetrates through the long slotted hole 210 to connect the adjusting knob 23 and the adjusting screw 21, and the cylindrical pin can move in the long slotted hole. The adjusting knob connecting end is provided with a second spring 211 on the outer side, one end of the second spring 211 is propped against the two ends of the cylindrical pin 29 extending outwards, and the other end of the second spring is propped against the inner side of the crimping machine shell 1. Under a normal state, the second spring 211 acts on the cylindrical pin 29, so that the positioning pin 28 of the adjusting knob is clamped into the positioning groove 27 of the positioning disc, and the adjusting knob cannot rotate; when adjusting screw 21 needs to be rotated, outwards extract adjusting knob 23, make locating pin 28 break away from the constant head tank 27 of positioning disk, during the rotation, adjusting knob rotates 90 every time, adjusting screw corresponds regulation 0.1mm, gear adjustment 0.1mm promptly, rotate adjusting knob according to the gear demand, rotate the back that targets in place, loosen adjusting knob 23, adjusting knob is under the effect of second spring 211, remove towards the positioning disk, make locating pin 28 block again in the constant head tank 27 of positioning disk, accomplish gear adjustment work.

In an initial state, a cylinder rod of the double-force cylinder 31 extends outwards, the clamp handle 4 inclines outwards, the head of the clamp shaft 5 is in a non-crimping state, namely each clamp tooth 53 is in a contraction state, and a thick wire can be crimped at the moment; according to the thickness of a wire to be crimped, the adjusting knob 23 is rotated, the adjusting screw 21 drives the adjusting block 22 to move, the adjusting block 22 drives the clamp shaft 5 to rotate relative to the clamp handle 4, so that a part of a crimping part at the front end of the clamp tooth 53 extends into the crimping hole 51, and the thin wire can be crimped at the moment. As the length of the jaw tooth crimping part extending into the jaw tooth crimping part is longer, the diameter of the crimped wire is smaller and thinner.

When the clamp works, the positioner is arranged on a crimping position of the head part of the clamp shaft 5, and the terminal is inserted into a crimping hole of the head part of the clamp shaft through the positioner; then the force-multiplying cylinder 31 is ventilated, the cylinder rod 33 is retracted inwards to drive the forceps handle 4 to rotate inwards, the forceps handle 4 and the forceps shaft 5 rotate relatively, the position where the forceps teeth 53 are abutted to the crimping track surface 45 changes, so that the four forceps teeth synchronously move towards the center, the crimping parts at the front ends of the forceps teeth crimp the terminals until the limiting plane 43 of the forceps handle 4 is abutted to the upper end of the limiting block 44 below, the forceps handle cannot rotate continuously, and the fact that the forceps handle rotates in place is indicated. At this time, the push rod 42 on the forceps handle will collide with the travel switch 6, the travel switch 6 is triggered by the push rod 42 to send out an in-place signal, and the double-force cylinder 31 drives the forceps handle 4 to reset to return to an initial state. At this time, the crimped wire terminal can be taken out, the next wire terminal to be crimped is put in, and the force doubling cylinder repeats the crimping operation.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (8)

1. Pneumatic four dabber pressfitting machines, its characterized in that: the automatic gear shifting mechanism comprises a crimping machine shell, wherein a crimping component, a gear adjusting component and a pneumatic component are arranged in the crimping machine shell, the crimping component comprises a clamp handle and a clamp shaft which are matched with each other, a movable hole is formed in the lower end of the clamp handle, and the head of the clamp shaft is arranged in the movable hole; the pneumatic assembly comprises a force multiplying cylinder, and the force multiplying cylinder is connected with the upper end of the clamp handle through a connecting rod and drives the clamp handle to rotate relative to the clamp shaft; the gear adjusting assembly comprises an adjusting screw and an adjusting block, the adjusting block is in threaded fit with the adjusting screw, and the tail of the clamp shaft is fixedly connected with the adjusting block; the adjusting screw rod drives the clamp shaft to rotate relative to the clamp handle through the adjusting block, and the relative position of the head of the clamp shaft and the movable hole is adjusted.

2. The pneumatic four-spindle press according to claim 1, wherein: the gear adjusting assembly further comprises an adjusting knob, a pointer and a dial, the adjusting knob is fixed to the end portion of the adjusting screw, the pointer is installed on the adjusting block, the dial is fixed to the shell of the crimping machine, and the pointer and the dial are matched to work.

3. The pneumatic four-spindle press according to claim 2, wherein: a positioning disc is arranged on the inner side of the adjusting knob and fixed on the shell of the crimping machine; the middle of the positioning disc is provided with a through hole, one side of the positioning disc, which faces to the adjusting knob, is provided with four positioning grooves distributed in a cross shape, the adjusting knob comprises an adjusting end and a connecting end, the connecting end extends into the shell of the crimping machine through the through hole of the positioning disc, the connecting end is provided with a positioning pin, and the positioning pin can be clamped into any one of the positioning grooves; the connecting end of the adjusting knob is of a hollow structure, the end part of the adjusting screw rod is arranged inside the connecting end, the adjusting screw rod and the connecting end are connected through a cylindrical pin, and the adjusting screw rod is matched with the cylindrical pin through a long slot hole; and a second spring is arranged on the outer side of the connecting end of the adjusting knob, one end of the second spring is abutted against the cylindrical pin, and the other end of the second spring is abutted against the inner side of the shell of the crimping machine.

4. The pneumatic four-spindle press according to claim 1, wherein: the clamp handle is provided with a push rod towards one side of the force multiplying cylinder, a travel switch is arranged between the clamp handle and the force multiplying cylinder, the force multiplying cylinder drives the clamp handle to rotate to a compression joint state, and the push rod is mutually abutted to the travel switch.

5. The pneumatic four-spindle press according to claim 1, wherein: the clamp is characterized in that a limiting block is arranged below the clamp handle, a limiting plane is arranged at the end part of the clamp handle close to one side of the force doubling cylinder, the force doubling cylinder drives the clamp handle to rotate to a compression joint state, and the limiting plane at the bottom of the clamp handle is abutted to the limiting block.

6. The pneumatic four-spindle press according to claim 1, wherein: the axle center department of pincers axle is equipped with the crimping hole, is equipped with four mounting holes that are the cross and arrange on the pincers axle, and the center that the mounting hole intersects is the crimping hole, is equipped with the pincers tooth in every mounting hole, and the pincers tooth front end stretches into the crimping hole of pincers axle, and the rear end supports on the activity hole of pincers handle.

7. The pneumatic four-spindle press according to claim 6, wherein: the edge of a movable hole of the clamp handle is uniformly divided into four crimping track surfaces, and the distances from each point on each crimping track surface to the circle center are different; the rear ends of the forceps teeth abut against the crimping track surface of the forceps handle, when the forceps handle rotates, the forceps teeth move in the mounting hole of the forceps shaft under the action of the crimping track surface, and the front ends of the forceps teeth move oppositely in the crimping hole.

8. The pneumatic four-spindle press according to claim 7, wherein: the clamp tooth is sleeved with a first spring, one end of the first spring abuts against the inner wall of the mounting hole, the other end of the first spring abuts against the tail end of the clamp tooth, and the tail end of the clamp tooth is tightly attached to the crimping track surface of the clamp handle.

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