Crimping machine

Abstract

The utility model belongs to the technical field of pipe fitting processing, and discloses a crimping machine which comprises a fixed seat, a piston module, a second sleeve and a reset piece, the piston module comprises a first sleeve and a plurality of pressing blocks, one end of the first sleeve is fixedly connected to the fixed seat along the axial direction, and the other end of the first sleeve is fixedly connected to the reset piece. The multiple pressing blocks are slidably connected to the other end, in the axial direction of the first sleeve, of the first sleeve in the radial direction of the first sleeve, the multiple pressing blocks are evenly arranged around the axis of the first sleeve, the periphery of the first sleeve is sleeved with the second sleeve, and the second sleeve can apply thrust to the multiple pressing blocks in the forward movement process; the thrust is withdrawn upon reverse movement of the second sleeve. Due to the fact that the crimping machine actuates the pressing blocks through the second sleeve, crimping of the pipe fitting is achieved, and therefore only the driving structure used for driving the second sleeve to move in the axial direction of the second sleeve needs to be arranged, the structure of the crimping machine is simplified, the manufacturing cost of the crimping machine is saved, meanwhile, the size of the crimping machine is reduced, and the crimping machine is convenient to arrange.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe fitting processing, in particular to a crimping machine. Background Art

[0002] At present, products such as integrated stoves, automobiles, and combustion furnaces generally transport fluids through pipes. Specifically, the pipes are used to connect an external fluid source with an operating module on the product, thereby achieving fluid transportation.

[0003] In the production process of pipe fittings, it is necessary to assemble joints at the ends of pipe fittings. The assembly process of joints generally includes three steps: flaring, plugging, and crimping. Specifically, the flaring machine first flares the end position of the pipe fitting, then the plugging machine inserts the joint into the pipe fitting through the end of the pipe fitting, and then the crimping machine crimps the radial portion of the pipe fitting that overlaps with the joint, thereby firmly assembling the joint into the pipe fitting.

[0004] In the prior art, a crimping machine is generally composed of a plurality of pressing heads, which can surround and embrace the outer circumference of a pipe fitting to crimp the pipe fitting. However, since each pressing head of a traditional crimping machine is driven individually, that is, all pressing heads are provided with a corresponding driving structure, the structure of the crimping machine is relatively complex, the manufacturing cost is high, and the crimping machine is large in size and inconvenient to arrange.

[0005] Therefore, the above problems need to be solved urgently. Utility Model Content

[0006] The utility model aims to provide a crimping machine to solve the problems that each crimping head of a traditional crimping machine is driven individually, resulting in a complex structure, high manufacturing cost, and a large size, which makes it inconvenient to arrange.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] Crimping machine, including:

[0009] Fixed seat;

[0010] The piston module comprises a first sleeve and a plurality of pressing blocks, wherein one end of the first sleeve along its axial direction is fixedly connected to the fixing seat, and the plurality of pressing blocks are all slidably connected to the other end of the first sleeve along its axial direction in the radial direction of the first sleeve, and the plurality of pressing blocks are evenly arranged around the axis of the first sleeve, and the plurality of pressing blocks have a first working position for enclosing and wrapping a pipe fitting, and a second working position for dispersing and releasing the pipe fitting;

[0011] a second sleeve, which is sleeved on the outer circumference of the first sleeve and can reciprocate along the axial direction thereof, and the second sleeve can apply a thrust to the plurality of pressing blocks during forward movement, so that the plurality of pressing blocks slide from the second working position to the first working position, and the thrust is cancelled when the second sleeve moves in the reverse direction; and

[0012] The reset member can restore the plurality of pressing blocks from the first working position to the second working position after the thrust is removed.

[0013] Preferably, the second sleeve is provided with a driving ring along one axial end thereof, the driving ring is provided on the same side as the plurality of pressing blocks, the driving ring is provided with a first inner hole, the first inner hole is coaxially arranged with the first sleeve, and the aperture of the first inner hole gradually increases from the side away from the second sleeve to the side close to the second sleeve, the pressing block is formed with an arc surface on the radial outer wall along the first sleeve, the radius of the arc surface in the radial direction of the first sleeve gradually increases from the side away from the first sleeve to the side close to the first sleeve, and the hole wall of the first inner hole can fit with and push against the arc surface when the second sleeve moves in the forward direction.

[0014] Preferably, the first sleeve is provided with a first boss along its radial outer side, the second sleeve is provided with a second boss along its radial inner side, the second boss is located on a side of the first boss away from the pressing block, and a first oil inlet cavity is formed between the first boss and the second boss;

[0015] A guide column is installed on the fixing seat, and the second sleeve is sleeved on the guide column. A second oil inlet cavity is formed between the side of the guide column away from the fixing seat and the second sleeve.

[0016] Preferably, a first sealing ring is pressed and defined between the first boss and the second sleeve, and a second sealing ring is pressed and defined between the second boss and the first sleeve.

[0017] Preferably, a third sealing ring is pressed and defined between the guide column and the second sleeve.

[0018] Preferably, the first sleeve is provided with a plurality of slide grooves along one end thereof in the axial direction, the slide grooves extend in the radial direction of the first sleeve, and the plurality of pressing blocks are slidably connected in the plurality of slide grooves one by one;

[0019] The first sleeve is provided with a second inner hole, and a plurality of guide pins are fixedly connected to the first sleeve, and the plurality of guide pins are arranged in a one-to-one correspondence with the plurality of slide grooves, and the guide pin passes through the slide groove along the radial direction of the first sleeve and extends into the second inner hole, and a first slider and a second slider are provided on the pressure block, and the first slider and the second slider are both slidably connected to the guide pin, the first slider is located in the slide groove, and the second slider is located in the second inner hole, and the reset member includes a plurality of reset springs, and the plurality of reset springs are arranged in a one-to-one correspondence in the plurality of slide grooves, and the reset spring is sleeved on the outer periphery of the guide pin and is located on a side of the first slider close to the second slider, and the reset spring abuts between the first slider and the first sleeve.

[0020] Preferably, the pressing block comprises a first block and a second block, the second block is detachably connected to the radial inner side of the first block along the first sleeve, and the first slider and the second slider are both arranged on the first block.

[0021] Preferably, a through hole is provided on the first block, and the through hole is communicated with the slide groove.

[0022] Preferably, a limiting boss is provided at one axial end of the first sleeve, and the limiting boss surrounds the radial outer circumference of a plurality of the pressing blocks along the first sleeve.

[0023] Preferably, the crimping machine further comprises a photoelectric switch, and the photoelectric switch is configured to detect the stroke of the second sleeve moving along its axial direction.

[0024] Beneficial effects of the utility model:

[0025] In the utility model, since the crimping machine actuates a plurality of pressing blocks through the second sleeve to achieve the crimping of the pipe fitting, the utility model only needs to provide a driving structure for driving the second sleeve to move along its axial direction, thereby simplifying the structure of the crimping machine, thereby saving the manufacturing cost of the crimping machine, and at the same time reducing the size of the crimping machine, thereby facilitating the arrangement of the crimping machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a crimping machine in an embodiment of the utility model;

[0027] Figure 2 It is an exploded view of the crimping machine in the embodiment of the utility model;

[0028] Figure 3 It is a front view of the crimping machine in the embodiment of the utility model;

[0029] Figure 4 is along Figure 3 Sectional view along line AA;

[0030] Figure 5 is along Figure 3 Sectional view along the midline BB;

[0031] Figure 6 It is a front view of the piston module in the embodiment of the utility model;

[0032] Figure 7 is along Figure 6 Sectional view of the mid-CC line;

[0033] Figure 8 yes Figure 7 A partial enlarged view of point D in the middle;

[0034] Fig. 9 This is a front view of the first sleeve in the embodiment of the utility model;

[0035] Fig.10 It is an exploded view of the pressing block and the return spring in the embodiment of the utility model.

[0036] In the figure:

[0037] 1. Fixed seat; 11. Guide column; 111. Third sealing ring; 112. Third guide ring;

[0038] 21. first sleeve; 211. first boss; 2111. first sealing ring; 2112. first guide ring; 212. slide groove; 213. second inner hole; 214. guide pin; 215. limiting boss; 22. pressing block; 221. arc surface; 222. first slider; 2221. bushing; 223. second slider; 224. first block; 2241. through hole; 2242. oil cup; 225. second block;

[0039] 3. Second sleeve; 31. Drive ring; 311. First inner hole; 32. Second boss; 321. Second sealing ring; 322. Second guide ring; 33. First oil inlet chamber; 34. Second oil inlet chamber; 35. First joint; 36. Second joint;

[0040] 41. Return spring;

[0041] 5. Photoelectric switch; 51. Transmitter; 52. Receiver. DETAILED DESCRIPTION

[0042] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0043] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0045] In the description of this embodiment, the terms "upper", "lower", "right", "left" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0046] See also Figures 1 to 10 In the present embodiment, a crimping machine is provided, which includes a fixed seat 1, a piston module, a second sleeve 3 and a reset member, wherein the piston module includes a first sleeve 21 and a plurality of pressing blocks 22, wherein one end of the first sleeve 21 along its axial direction is fixedly connected to the fixed seat 1, and the plurality of pressing blocks 22 are all slidably connected to the other end of the first sleeve 21 along its axial direction along the radial direction of the first sleeve 21, and the plurality of pressing blocks 22 are evenly arranged around the axis of the first sleeve 21, and the plurality of pressing blocks 22 have a first working position for enclosing and wrapping the pipe fitting, and a second working position for dispersing and releasing the pipe fitting, the second sleeve 3 is sleeved on the outer periphery of the first sleeve 21, and can reciprocate along its axial direction, the second sleeve 3 can apply a thrust to the plurality of pressing blocks 22 during the forward movement process, so that the plurality of pressing blocks 22 slide from the second working position to the first working position, and the thrust is cancelled when the second sleeve 3 moves in the reverse direction, and the reset member can restore the plurality of pressing blocks 22 from the first working position to the second working position after the thrust is cancelled.

[0047] In this embodiment, the crimping machine crimps the pipe fitting by switching a plurality of pressing heads between the first working position and the second working position. Specifically, the second sleeve 3 can move in the positive direction along its axial direction and actuate a plurality of pressing blocks 22. The plurality of pressing blocks 22 can enclose the axis of the first sleeve 21 under the actuation of the second sleeve 3, thereby switching from the second working position to the first working position. When the plurality of pressing blocks 22 are located in the first working position, the plurality of pressing blocks 22 can wrap the pipe fitting and apply pressure to the pipe fitting, thereby crimping the pipe fitting. After the crimping is completed, the second sleeve 3 moves in the opposite direction, thereby releasing the thrust exerted on the plurality of pressing blocks 22. The plurality of pressing blocks 22 are restored to the second working position from the first working position under the action of the reset member, thereby loosening the pipe fitting.

[0048] Based on the above, in the present embodiment, since the crimping machine actuates a plurality of pressing blocks 22 through the second sleeve 3 to achieve crimping of the pipe fitting, the present embodiment only needs to provide a driving structure for driving the second sleeve 3 to move along its axial direction, thereby simplifying the structure of the crimping machine, thereby saving the manufacturing cost of the crimping machine, and at the same time reducing the volume of the crimping machine, thereby facilitating the arrangement of the crimping machine.

[0049] Preferably, the second sleeve 3 is provided with a driving ring 31 along one end thereof in the axial direction, the driving ring 31 is provided on the same side as the plurality of pressing blocks 22, the driving ring 31 is provided with a first inner hole 311, the first inner hole 311 is provided coaxially with the first sleeve 21, and the aperture of the first inner hole 311 gradually increases from the side away from the second sleeve 3 to the side close to the second sleeve 3, the pressing block 22 is formed with an arc surface 221 on the radial outer wall of the first sleeve 21, and the radius of the arc surface 221 in the radial direction of the first sleeve 21 increases from the side away from the first sleeve 21 to the side close to the second sleeve 3. One side of the sleeve 21 gradually increases toward the side close to the first sleeve 21, that is, when the plurality of pressing blocks 22 are located at the first working position, the plurality of pressing blocks 22 can jointly form a truncated cone, and the hole wall of the first inner hole 311 can fit with and push against the arc surface 221 when the second sleeve 3 moves forward, that is, in this embodiment, the second sleeve 3 moves toward the side close to the fixing seat 1 as a forward movement, and correspondingly, the second sleeve 3 moves toward the side away from the fixing seat 1 as a reverse movement. When the second sleeve 3 moves along its axial direction toward the side close to the fixed seat 1, the second sleeve 3 can push against the plurality of pressing blocks 22 through the driving ring 31, and make the plurality of pressing blocks 22 synchronously close to the side of the axis close to the first sleeve 21, so as to surround and wrap the pipe fitting; when the second sleeve 3 moves along its axial direction toward the side away from the fixed seat 1, the driving ring 31 cancels the push against all the pressing blocks 22, thereby canceling the thrust applied to all the pressing blocks 22, so that the plurality of pressing blocks 22 can be dispersed outwards under the action of the reset member until they are restored to the second working position.

[0050] Furthermore, the first sleeve 21 is provided with a first boss 211 along its radial outer side, and the second sleeve 3 is provided with a second boss 32 along its radial inner side. The second boss 32 is located on the side of the first boss 211 away from the pressure block 22, and a first oil inlet chamber 33 is formed between the first boss 211 and the second boss 32. Since the position of the first sleeve 21 is fixed, when oil is filled into the first oil inlet chamber 33, the second boss 32 can be pushed and drive the second sleeve 3 to move as a whole toward the side close to the fixed seat 1, that is, this embodiment can make the second sleeve 3 move in the positive direction by filling oil into the first oil inlet chamber 33.

[0051] In addition, a guide column 11 is installed on the fixed seat 1, and the second sleeve 3 is sleeved on the guide column 11. A second oil inlet chamber 34 is formed between the side of the guide column 11 away from the fixed seat 1 and the second sleeve 3. Since the position of the fixed seat 1 is fixed, when oil is filled into the second oil inlet chamber 34, the second sleeve 3 can be pushed to move toward the side away from the fixed seat 1, that is, this embodiment can make the second sleeve 3 move in the opposite direction by filling oil into the second oil inlet chamber 34.

[0052] Based on the above, in this embodiment, when filling oil into the first oil inlet chamber 33, the second sleeve 3 moves forward, so that the driving ring 31 can apply thrust to all the pressing blocks 22, and then all the pressing blocks 22 surround and wrap the pipe fittings, and apply pressure to the pipe fittings to complete the buckling operation of the pipe fittings, and when filling oil into the second oil inlet chamber 34, the second sleeve 3 moves in the opposite direction, so as to cancel the thrust applied to the pressing blocks 22, and then all the pressing blocks 22 can be restored from the first working position to the second working position. It can be understood that when filling oil into the first oil inlet chamber 33, the oil in the second oil inlet chamber 34 is discharged, and correspondingly, when filling oil into the second oil inlet chamber 34, the oil in the first oil inlet chamber 33 is discharged.

[0053] Based on the above, in this embodiment, it is only necessary to provide a first connector 35 for communicating with the first oil inlet chamber 33 and a second connector 36 for communicating with the second oil inlet chamber 34 on the second sleeve 3 to realize the driving of the second sleeve 3, thereby further simplifying the structure of the crimping machine, thereby further saving the manufacturing cost of the crimping machine, and further reducing the size of the crimping machine, thereby further facilitating the layout of the crimping machine.

[0054] Furthermore, the crimping machine also includes a photoelectric switch 5, which is configured to detect the stroke of the second sleeve 3 moving along its axial direction, that is, the present embodiment can control the stroke of the second sleeve 3 moving in the forward direction, thereby controlling the distance that the driving ring 31 pushes against the sliding of the pressure block 22, and further controlling the pressure applied by the plurality of pressure blocks 22 to the pipe fitting. Specifically, the greater the stroke of the second sleeve 3 moving in the forward direction, the greater the distance that the driving ring 31 pushes against the sliding of the pressure block 22, thereby making the pressure applied by the plurality of pressure blocks 22 to the pipe fitting greater. In addition, the present embodiment can also control the maximum stroke of the second sleeve 3 by the photoelectric switch 5, thereby avoiding damage to the pressure block 22.

[0055] In this embodiment, the photoelectric switch 5 preferably includes a transmitter 51 and a receiver 52, and the transmitter 51 and the receiver 52 are arranged opposite to each other along the axial direction of the first sleeve 21, wherein the transmitter 51 is mounted on the fixing seat 1, and the receiver 52 is mounted on the second sleeve 3, and the signal emitted by the transmitter 51 can be received by the receiver 52, thereby detecting the stroke of the forward movement of the second sleeve 3. Of course, in other optional embodiments, the transmitter 51 can also be mounted on the second sleeve 3, and the receiver 52 can be mounted on the fixing seat 1, and this is not specifically limited in this embodiment.

[0056] In addition, a first sealing ring 2111 is pressed and defined between the first boss 211 and the second sleeve 3 , and a second sealing ring 321 is pressed and defined between the second boss 32 and the first sleeve 21 , thereby preventing leakage of the oil filled in the first oil inlet chamber 33 .

[0057] It is worth mentioning that a first guide ring 2112 is pressed and defined between the first boss 211 and the second sleeve 3 , and a second guide ring 322 is pressed and defined between the second boss 32 and the first sleeve 21 . The first guide ring 2112 and the second guide ring 322 can provide guidance for the movement of the second sleeve 3 .

[0058] Furthermore, a third sealing ring 111 is pressed and defined between the guide column 11 and the second sleeve 3 , so as to prevent the oil filled in the second oil inlet chamber 34 from leaking.

[0059] It is worth noting that a third guide ring 112 is pressed and defined between the guide column 11 and the second sleeve 3 , and the third guide ring 112 can provide a guide for the movement of the second sleeve 3 .

[0060] Based on the above, in this embodiment, a plurality of slide grooves 212 are provided along one axial end of the first sleeve 21 , the slide grooves 212 extend along the radial direction of the first sleeve 21 , and a plurality of pressing blocks 22 are slidably connected one by one in the plurality of slide grooves 212 .

[0061] In addition, the first sleeve 21 is provided with a second inner hole 213, and a plurality of guide pins 214 are fixedly connected to the first sleeve 21, and the plurality of guide pins 214 are arranged one-to-one with the plurality of slide grooves 212, and the guide pin 214 passes through the slide groove 212 along the radial direction of the first sleeve 21 and extends into the second inner hole 213, and a first slider 222 and a second slider 223 are provided on the pressing block 22, and the first slider 222 and the second slider 223 are both slidably connected to the guide pin 214, the first slider 222 is located in the slide groove 212, and the second slider 223 is located in the second inner hole 213, and the reset member includes a plurality of reset springs 41, and the plurality of reset springs 41 are arranged one-to-one in the plurality of slide grooves 212, and the reset spring 41 is sleeved on the outer periphery of the guide pin 214 and is located on the side of the first slider 222 close to the second slider 223, and the reset spring 41 abuts between the first slider 222 and the first sleeve 21.

[0062] When the second sleeve 3 moves forward, the driving ring 31 can push the pressure block 22 and make the pressure block 22 slide along the guide pin 214 through the first slider 222 and the second slider 223, so that several pressure blocks 22 are surrounded. During this process, the return spring 41 is compressed and deformed. When the second sleeve 3 moves backward, the driving ring 31 releases the push on the pressure block 22. At this time, the return spring 41 recovers its deformation, so that several pressure blocks 22 are dispersed toward the side away from the axis of the first sleeve 21.

[0063] Preferably, the pressing block 22 includes a first block 224 and a second block 225, wherein the second block 225 is detachably connected to the radial inner side of the first block 224 along the first sleeve 21, and the first slider 222 and the second slider 223 are both arranged on the first block 224, that is, in this embodiment, the driving ring 31 pushes against the first block 224, and the first block 224 can drive the second block 225 to move radially along the first sleeve 21, so that several second blocks 225 surround and wrap the pipe.

[0064] It can be understood that the first slider 222 and the second slider 223 are installed in the slide groove 212 in a clearance fit manner, and the first slider 222 and the second slider 223 are both sleeved on the outer periphery of the guide pin 214 through the shaft sleeve 2221, thereby ensuring that the first slider 222 and the second slider 223 can slide smoothly.

[0065] Based on the above, the second block 225 is a component that directly contacts the pipe fitting and applies pressure to the pipe fitting. It has no direct connection with the first sleeve 21, but is indirectly connected to the first sleeve 21 through the first block 224. Therefore, after the crimping machine has been working for a period of time, the present embodiment only needs to replace the worn second block 225 so that the crimping machine can continue to work effectively without replacing the entire pressing block 22. This can save replacement time on the one hand and improve production efficiency, and can further save costs on the other hand.

[0066] It can be understood that the first block 224 can be detachably connected to the first block 224 by bolt connection or pin connection, etc., and this is not specifically limited in the present embodiment.

[0067] Furthermore, a through hole 2241 is provided on the first block 224, and the through hole 2241 is connected to the slide groove 212, so that lubricating liquid can be added to the slide groove 212, thereby ensuring that the first block 224 can slide without obstruction. Specifically, an oil cup 2242 is provided in the through hole 2241, one end of the oil cup 2242 is connected to an external oil source, and the other end of the oil cup 2242 is connected to the slide groove 212 through the through hole 2241.

[0068] In addition, a limiting boss 215 is provided along one axial end of the first sleeve 21, and the limiting boss 215 surrounds the radial outer periphery of a plurality of pressure blocks 22 along the first sleeve 21. When the plurality of pressure blocks 22 are dispersed toward the side away from the axis of the first sleeve 21, the pressure blocks 22 can abut against the limiting boss 215, that is, the limiting boss 215 can limit the pressure blocks 22 when the plurality of pressure blocks 22 are dispersed toward the side away from the axis of the first sleeve 21.

[0069] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A crimping machine, characterized in that: include: Fixed seat (1); A piston module, comprising a first sleeve (21) and a plurality of pressing blocks (22), wherein one end of the first sleeve (21) along its axial direction is fixedly connected to the fixing seat (1), and the plurality of pressing blocks (22) are all slidably connected to the other end of the first sleeve (21) along its axial direction along the radial direction of the first sleeve (21), and the plurality of pressing blocks (22) are evenly arranged around the axis of the first sleeve (21), and the plurality of pressing blocks (22) have a first working position for enclosing and wrapping a pipe fitting, and a second working position for dispersing and releasing the pipe fitting; a second sleeve (3) which is sleeved on the outer periphery of the first sleeve (21) and is capable of reciprocating along the axial direction thereof; the second sleeve (3) is capable of applying a thrust to the plurality of pressing blocks (22) during forward movement, so that the plurality of pressing blocks (22) slide from the second working position to the first working position; and the thrust is cancelled when the second sleeve (3) moves in the reverse direction; and The reset member can restore the plurality of pressing blocks (22) from the first working position to the second working position after the thrust is removed.

2. The crimping machine according to claim 1, characterized in that: A driving ring (31) is provided at one axial end of the second sleeve (3). The driving ring (31) is provided on the same side as a plurality of the pressing blocks (22). The driving ring (31) is provided with a first inner hole (311). The first inner hole (311) is coaxially arranged with the first sleeve (21), and the aperture of the first inner hole (311) gradually increases from a side away from the second sleeve (3) to a side close to the second sleeve (3). An arc surface (221) is formed on the radial outer wall of the pressing block (22) along the first sleeve (21). The radius of the arc surface (221) in the radial direction of the first sleeve (21) gradually increases from a side away from the first sleeve (21) to a side close to the first sleeve (21). The hole wall of the first inner hole (311) can be in contact with and pushed against the arc surface (221) when the second sleeve (3) moves in the forward direction.

3. The crimping machine according to claim 2, characterized in that: The first sleeve (21) is provided with a first boss (211) along its radial outer side, and the second sleeve (3) is provided with a second boss (32) along its radial inner side, the second boss (32) is located on a side of the first boss (211) away from the pressure block (22), and a first oil inlet cavity (33) is formed between the first boss (211) and the second boss (32); A guide column (11) is mounted on the fixing seat (1), and the second sleeve (3) is sleeved on the guide column (11). A second oil inlet chamber (34) is formed between a side of the guide column (11) away from the fixing seat (1) and the second sleeve (3).

4. The crimping machine according to claim 3, characterized in that: A first sealing ring (2111) is formed by pressing between the first boss (211) and the second sleeve (3), and a second sealing ring (321) is formed by pressing between the second boss (32) and the first sleeve (21).

5. The crimping machine according to claim 3, characterized in that: A third sealing ring (111) is pressed and defined between the guide column (11) and the second sleeve (3).

6. The crimping machine according to claim 1, characterized in that: A plurality of slide grooves (212) are provided along one axial end of the first sleeve (21), the slide grooves (212) extend along the radial direction of the first sleeve (21), and the plurality of pressing blocks (22) are slidably connected one by one in the plurality of slide grooves (212); The first sleeve (21) is provided with a second inner hole (213), and a plurality of guide pins (214) are fixedly connected to the first sleeve (21), and the plurality of guide pins (214) are arranged in a one-to-one correspondence with the plurality of slide grooves (212), and the guide pins (214) pass through the slide grooves (212) along the radial direction of the first sleeve (21) and extend into the second inner hole (213), and the pressing block (22) is provided with a first slider (222) and a second slider (223), and the first slider (222) and the second slider (223) are both slidably connected to the guide pins (2 14), the first slider (222) is located in the slide groove (212), the second slider (223) is located in the second inner hole (213), the reset member includes a plurality of reset springs (41), the plurality of reset springs (41) are arranged in a plurality of the slide grooves (212) in a one-to-one correspondence, the reset spring (41) is sleeved on the outer periphery of the guide pin (214), and is located on a side of the first slider (222) close to the second slider (223), and the reset spring (41) is abutted between the first slider (222) and the first sleeve (21).

7. The crimping machine according to claim 6, characterized in that: The pressing block (22) comprises a first block (224) and a second block (225), wherein the second block (225) is detachably connected to the radial inner side of the first block (224) along the first sleeve (21), and the first slider (222) and the second slider (223) are both arranged on the first block (224).

8. The crimping machine according to claim 7, characterized in that: The first block (224) is provided with a through hole (2241), and the through hole (2241) is communicated with the slide groove (212).

9. The crimping machine according to claim 6, characterized in that: A limiting boss (215) is provided at one axial end of the first sleeve (21), and the limiting boss (215) surrounds the radial outer circumference of a plurality of the pressing blocks (22) along the first sleeve (21).

10. The crimping machine according to claim 1, characterized in that: The crimping machine further comprises a photoelectric switch (5), wherein the photoelectric switch (5) is configured to detect the travel of the second sleeve (3) along its axial direction.

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