Cable terminal connection locking device

Abstract

The present invention relates to the technical field of cable crimping, and in particular to a cable terminal connection locking device, comprising a fixed handle, an adjusting handle, a locking shell and a hydraulic shell. A first chamber, a second chamber and a third chamber are arranged in the hydraulic shell. A first piston is slidably arranged in the first chamber, an adjusting shell is slidably arranged in the second chamber, a second piston is slidably connected to the adjusting shell through a first elastic member, and a third piston is slidably connected to the third chamber through a second elastic member. A cable terminal connection locking device of the present invention is provided with a fixed handle, an adjusting handle, a locking shell and a hydraulic shell, and a first chamber, a second chamber and a third chamber are arranged in the hydraulic shell. In the process of locking the copper nose with the cable terminal, there is relatively fast movement, and it can be relatively labor-saving when pressing and locking, thereby improving the operating efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of cable crimping, and in particular to a cable terminal connection locking device. Background Art

[0002] When installing cable connectors, a certain force and mechanism are required between the cable and the connector to ensure the firmness and locking of the connection. This locking can be mechanical, hydraulic or electric. Hydraulic pliers are a tool used to crimp cables or wires. It provides high pressure through a hydraulic system. After stripping the copper wire inside the cable terminal, the hydraulic pliers are used to fasten the copper wire and the copper nose together, which can ensure that the copper wire and the copper nose will not separate, and can increase the contact area and reduce the contact resistance.

[0003] When the hydraulic pliers are used to lock the cable terminal, the action of the hydraulic pliers can be divided into two processes: the movement of the extrusion block and the pressing. The movement is mainly to enable the extrusion block to approach the copper nose and abut against the copper nose to initially position the copper nose, while the pressing requires a large driving force to lock the copper nose and the cable terminal. In order to generate a large driving force during the extrusion process, the existing hydraulic pliers are usually set to a large transmission ratio. Although it can save effort, this setting method requires pressing many times during the movement process before the extrusion block moves a little distance. The entire operation process is very time-consuming and has low work efficiency. Summary of the invention

[0004] The invention provides a cable terminal connection locking device to solve the problem that the existing hydraulic pliers are very time-consuming and have low working efficiency during the process of moving and pressing when locking the cable terminal.

[0005] A cable terminal connection locking device of the present invention adopts the following technical scheme: a cable terminal connection locking device, comprising a fixed handle, an adjusting handle, a locking shell and a hydraulic shell; the hydraulic shell is fixedly connected to the fixed handle, the hydraulic shell is filled with hydraulic oil, and a first chamber, a second chamber and a third chamber are arranged in the hydraulic shell; a first piston is slidably arranged in the first chamber, the first piston can reciprocate along a first direction and draw hydraulic oil from the hydraulic shell, the first direction is a vertical direction; the adjusting handle is used to drive the first piston to reciprocate along the first direction; the first chamber can only transport hydraulic oil to the second chamber, an adjusting shell is slidably arranged in the second chamber, an oil inlet is provided on the adjusting shell, a second piston is slidably connected to the adjusting shell through a first elastic member, the adjusting shell and the second piston can both move along the second direction, the second direction is perpendicular to the first direction, and the second direction is a horizontal direction; the third chamber is connected to the second chamber, and the third A third piston is slidably connected to the chamber through a second elastic member. The third piston is fixedly connected to the second piston and can move along the second direction with the second piston. The diameter of the first piston is less than or equal to the diameter of the adjusting shell, and the diameter of the adjusting shell is smaller than the diameter of the third piston. The locking shell is fixedly connected to the hydraulic shell and is located on the side of the hydraulic shell away from the fixed handle in the second direction. There is an extrusion space in the locking shell, and the movement of the third piston along the second direction can increase or decrease the extrusion space. A damping hole is provided on the second piston, and the damping hole has a first state, a second state and a third state. When in the first state, the damping size generated by the damping hole is a first preset value, when in the second state, the damping size generated by the damping hole is a second preset value, and when in the third state, the damping size generated by the damping hole is a third preset value. The third preset value is smaller than the first preset value, and the first preset value is smaller than the second preset value. In the initial state, the damping hole is in the first state.

[0006] Furthermore, a stopper is coaxially arranged inside the adjusting shell, and the stopper is a spiral structure. The two ends along the spiral axis of the stopper are respectively called the first end and the second end, and the size of the first end in the third direction is smaller than the size of the second end in the third direction; the third direction is perpendicular to the first direction and the second direction respectively, and the third direction is a horizontal direction. In the initial state, the damping hole and the first end of the stopper are sequentially arranged in the second direction and abut against each other, and the third piston can move along the second direction and rotate around the second direction.

[0007] Furthermore, the locking shell and the third piston are spirally driven.

[0008] Furthermore, the angle at which the third piston rotates around the second direction is negatively correlated with the diameter of the copper nose, and negatively correlated with the resistance that the damping hole can generate.

[0009] Furthermore, the first chamber is provided with a first one-way valve and a second one-way valve, the hydraulic oil in the hydraulic housing can be unidirectionally transmitted to the first chamber through the first one-way valve, and the hydraulic oil in the first chamber can be unidirectionally transmitted to the second chamber through the second one-way valve.

[0010] Furthermore, the hydraulic shell and the third chamber are connected via a pressure relief block, which has a locked state and an unlocked state. When in the locked state, the hydraulic oil can only flow from the hydraulic shell to the third chamber in one direction; when in the unlocked state, the hydraulic oil in the third chamber and the hydraulic oil in the hydraulic shell can flow with each other; in the initial state, the pressure relief block is in a locked state.

[0011] Furthermore, a third one-way valve is arranged on the pressure relief block, the pressure relief block can slide on the third chamber, a valve is arranged on the hydraulic shell, and the pressure relief block is connected to the valve.

[0012] Furthermore, a locking rod, a first extrusion block and a second extrusion block are sequentially arranged on the locking shell along the second direction. The locking rod is fixedly installed on the locking shell, the first extrusion block is fixedly connected to the locking rod, and the second extrusion block is connected to the third piston. It can move in the second direction with the third piston and rotate relative to the third piston; an extrusion space is defined between the first extrusion block and the second extrusion block.

[0013] Furthermore, a limit rod is provided on the hydraulic shell, the limit rod is provided along the first direction, the adjustment handle is rotatably connected to the limit rod, one end of the first piston along the first direction is slidably installed in the first chamber, and the other end along the first direction extends out of the hydraulic shell and is rotatably connected to the adjustment handle.

[0014] Furthermore, the fixed handle has an inner cavity, an oil pipe is fixedly arranged in the inner cavity, the oil pipe is filled with hydraulic oil, and the hydraulic shell is connected to the oil pipe.

[0015] The beneficial effects of the present invention are as follows: a cable terminal connection locking device of the present invention is provided with a fixed handle, an adjusting handle, a locking shell and a hydraulic shell, and a first chamber, a second chamber and a third chamber are provided in the hydraulic shell. In the process that the operator repeatedly lifts and presses the adjusting handle, the damping hole will change from the first state to the second state, and the damping size generated by the damping hole is the second preset value. Since the first preset value is less than the second preset value, the damping size generated by the damping hole is relatively increased, thereby reducing the amount of hydraulic oil that can directly enter the third chamber from the damping hole, and increasing the amount of hydraulic oil that can directly drive the third piston to move through the adjusting shell. As a result, in the process that the operator repeatedly lifts and presses the adjusting handle, the speed of movement of the third piston gradually increases, thereby accelerating the change speed of the extrusion space through the third piston, thereby accelerating the process of the extrusion space abutting against the copper nose. When the copper nose contacts the extrusion space, the operator continues to repeatedly pull and press the adjustment handle to switch the damping hole to the third state. Since the third preset value is less than the first preset value and less than the second preset value, the amount of hydraulic oil that can directly enter the third chamber from the damping hole increases relatively. Since the diameter of the third piston is greater than the diameter of the first piston, the distance that this part of the hydraulic oil directly causes the third piston to move is relatively small, and the transmission force transmitted to the third piston through the first piston and acting on the extrusion space will increase, thereby completing the extrusion between the cable terminal and the copper nose. That is, there is a relatively fast movement in the process of locking the copper nose and the cable terminal, and it can be relatively labor-saving when pressing and locking, which improves the operating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of the overall structure of an embodiment of a cable terminal connection locking device of the present invention;

[0018] Figure 2 It is a front view of the overall structure of an embodiment of a cable terminal connection locking device of the present invention;

[0019] Figure 3 A top view of the overall structure of an embodiment of a cable terminal connection locking device of the present invention;

[0020] Figure 4 for Figure 3 Sectional view along AA;

[0021] Figure 5 for Figure 4 Enlarged view of point C in the middle;

[0022] Figure 6 for Figure 4 The enlarged view of point D in the middle;

[0023] Figure 7 for Figure 3 Cross-sectional view along the middle line BB;

[0024] Figure 8 for Figure 7 Enlarged view of point E in the middle;

[0025] Fig. 9 A schematic diagram of a second piston of an embodiment of a cable terminal connection locking device of the present invention;

[0026] Fig.10 The present invention is a schematic diagram of a stopper inside an adjusting housing of an embodiment of a cable terminal connection locking device of the present invention.

[0027] In the figure: 100, fixed handle; 110, oil pipe; 200, adjusting handle; 300, locking shell; 310, extrusion space; 320, locking rod; 330, first extrusion block; 340, second extrusion block; 400, hydraulic shell; 401, valve; 402, limit rod; 410, first chamber; 411, first one-way valve; 412, second one-way valve; 420, second chamber; 430, third chamber; 431, second elastic member; 432, pressure relief block; 440, first piston; 450, adjusting shell; 451, oil inlet; 452, first elastic member; 453, stopper; 460, second piston; 461, damping hole; 470, third piston. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] An embodiment of a cable terminal connection locking device of the present invention is as follows Figures 1 to 10 shown.

[0030] A cable terminal connection locking device comprises a fixed handle 100, an adjustment handle 200, a locking shell 300 and a hydraulic shell 400. The hydraulic shell 400 is fixedly connected to the fixed handle 100, and the hydraulic shell 400 is filled with hydraulic oil. The hydraulic shell 400 is provided with a first chamber 410, a second chamber 420 and a third chamber 430. A first piston 440 is slidably provided in the first chamber 410, and the first piston 440 is slidably sealed with the first chamber 410. The first piston 440 can reciprocate along a first direction and draw hydraulic oil from the hydraulic shell 400, and the first direction is a vertical direction. The adjustment handle 200 is connected to the first piston 440, and is used to drive the first piston 440 to reciprocate along the first direction.

[0031] The second chamber 420 is unidirectionally connected to the first chamber 410. The first chamber 410 can only deliver hydraulic oil to the second chamber 420. An adjusting shell 450 is slidably arranged in the second chamber 420. The adjusting shell 450 and the second chamber 420 are slidably sealed. An oil inlet 451 is provided on the adjusting shell 450. A second piston 460 is slidably connected to the adjusting shell 450 through a first elastic member 452. The second piston 460 and the second chamber 420 are slidably sealed. The first elastic member 452 is arranged along the second direction. The first elastic member 452 is a spring. Both the adjusting shell 450 and the second piston 460 can move along the second direction. The second direction is perpendicular to the first direction and is a horizontal direction.

[0032] The third chamber 430 is connected to the second chamber 420. A third piston 470 is slidably connected to the third chamber 430 through a second elastic member 431. The second elastic member 431 is arranged along the second direction and is a spring. The elastic coefficient of the second elastic member 431 is smaller than the elastic coefficient of the first elastic member 452. The third piston 470 is fixedly connected to the second piston 460 and can move along the second direction with the second piston 460. The third piston 470 is slidably sealed with the third chamber 430. The diameter of the first piston 440 is less than or equal to the diameter of the adjusting shell 450, and the diameter of the adjusting shell 450 is smaller than the diameter of the third piston 470.

[0033] The locking shell 300 is fixedly connected to the hydraulic shell 400 and is located on the side of the hydraulic shell 400 away from the fixed handle 100 in the second direction. The locking shell 300 has an extrusion space 310. The third piston 470 moves in the second direction to increase or decrease the extrusion space 310. The second piston 460 is provided with a damping hole 461. The damping hole 461 has a first state, a second state and a third state. When in the first state, the damping magnitude generated by the damping hole 461 is a first preset value. When in the second state, the damping magnitude generated by the damping hole 461 is a second preset value. When in the third state, the damping magnitude generated by the damping hole 461 is a third preset value. The third preset value is smaller than the first preset value, and the first preset value is smaller than the second preset value. In the initial state, the damping hole 461 is in the first state. And the first piston 440 reciprocates in the first direction to switch the damping hole 461 from the first state to the second state, and then from the second state to the third state.

[0034] In this embodiment, a fixed handle 100, an adjusting handle 200, a locking shell 300 and a hydraulic shell 400 are provided, and a first chamber 410, a second chamber 420 and a third chamber 430 are provided in the hydraulic shell 400. When locking the copper nose and the cable terminal, the operator pulls and presses the adjusting handle 200 to make the first piston 440 reciprocate along the first direction, and the hydraulic oil in the hydraulic shell 400 is sucked into the first chamber 410, and then comes into the second chamber 420 after passing through the first chamber 410.

[0035] Since the damping size generated by the damping hole 461 in the initial state is the first preset value, at this time a part of the hydraulic oil will directly drive the adjusting shell 450 to move in the second direction, and the movement of the adjusting shell 450 will drive the second piston 460 to move through the first elastic member 452, and then drive the third piston 470 to move. Since the diameter of the first piston 440 is less than or equal to the diameter of the adjusting shell 450, which is smaller than the diameter of the third piston 470, the distance driven by this part of the hydraulic oil to move the adjusting shell 450 will be transmitted to the third piston 470 through the second piston 460. Compared with the first piston 440 directly prompting the third piston 470 to move, the first piston 440 is used to directly drive the adjusting shell 450 to move, and then indirectly drive the third piston 470 to move, so that the third piston 470 can produce a larger moving distance. Another part of the hydraulic oil will enter the adjusting shell 450 from the oil inlet 451, and enter the third chamber 430 after passing through the damping hole 461. This part of the hydraulic oil will directly cause the third piston 470 to move to the left. However, since the diameter of the third piston 470 is greater than the diameter of the first piston 440, the distance that this part of the hydraulic oil directly causes the third piston 470 to move is relatively small.

[0036] In the process of the operator repeatedly lifting and pressing the adjustment handle 200, the damping hole 461 will change from the first state to the second state. At this time, the damping size generated by the damping hole 461 is the second preset value. Since the first preset value is less than the second preset value, the damping size generated by the damping hole 461 is relatively increased, thereby reducing the amount of hydraulic oil that can directly enter the third chamber 430 from the damping hole 461, and increasing the amount of hydraulic oil that can directly drive the third piston 470 to move through the adjustment shell 450. As a result, in the process of the operator repeatedly lifting and pressing the adjustment handle 200, the movement speed of the third piston 470 gradually increases, thereby accelerating the change speed of the extrusion space 310 through the third piston 470, and accelerating the process of the extrusion space 310 abutting against the copper nose.

[0037] After the copper nose contacts the extrusion space 310, the operator continues to repeatedly pull and press the adjustment handle 200 to switch the damping hole 461 to the third state. Since the third preset value is less than the first preset value and less than the second preset value, the amount of hydraulic oil that can directly enter the third chamber 430 from the damping hole 461 is relatively increased. Since the diameter of the third piston 470 is greater than the diameter of the first piston 440, the distance that this part of the hydraulic oil directly causes the third piston 470 to move is relatively small, and the transmission force transmitted to the third piston 470 through the first piston 440 and acting on the extrusion space 310 will increase, thereby completing the extrusion between the cable terminal and the copper nose. That is, there is a relatively fast movement in the process of locking the copper nose and the cable terminal, and it can be relatively labor-saving when pressing and locking, which improves the operating efficiency.

[0038] Specifically, the diameter ratio of the third piston 470 to the first piston 440 is 10:1. Assuming that the oil chamber area of ​​the first chamber 410 is S1, and the oil chamber area of ​​the third chamber 430 is S3, S3=100*S1. Therefore, the distance that the hydraulic oil in the first chamber 410 can directly cause the third piston 470 to move to the left is relatively small, and after the transmission force F1 applied to the first chamber 410 is directly transmitted to the third chamber 430, the transmission force F3=100*F1 transmitted from the third chamber 430 to the extrusion space 310 through the third piston 470 is achieved, achieving a large transmission force output.

[0039] In this embodiment, a stopper 453 is coaxially arranged inside the regulating shell 450. The stopper 453 is a spiral structure. The two ends along the spiral axis of the stopper 453 are respectively referred to as the first end and the second end. The size of the first end in the third direction is smaller than the size of the second end in the third direction. The third direction is perpendicular to the first direction and the second direction respectively. The third direction is a horizontal direction, that is, the radial direction of the second piston 460. In the initial state, the damping hole 461 and the first end of the stopper 453 are sequentially arranged in the second direction and abut against each other, and the third piston 470 can move along the second direction while rotating around the second direction.

[0040] In this embodiment, the locking housing 300 and the third piston 470 are screw-driven, so that the third piston 470 can move along the second direction while rotating around the second direction.

[0041] Specifically, a spiral groove is provided on the inner circumferential wall surface of the locking shell 300, and spiral protrusions for cooperating with the spiral groove are uniformly distributed in the circumferential direction of the piston rod of the third piston 470. In this embodiment, by setting the stopper 453, the damping hole 461 and the first end of the stopper 453 are sequentially arranged and abutted against each other in the second direction in the initial state, and the damping generated by the damping hole 461 is the first preset value. When the third piston 470 moves along the second direction, the spiral transmission between the third piston 470 and the locking shell 300 takes effect, so that the third piston 470 can move along the second direction while rotating around the second direction. The rotation of the third piston 470 will drive the second piston 460 fixed thereto to rotate synchronously, so that the damping hole 461 on the second piston 460 rotates relative to the stopper 453 around the second direction, from the first end of the stopper 453 to the second end of the stopper 453, and the area of ​​the damping hole 461 blocked by the stopper 453 gradually increases, so that the damping generated by the damping hole 461 can increase from the first preset value to the second preset value.

[0042] When the extrusion space 310 abuts the copper nose, the operator continues to pull and press the operating handle to cause the adjusting shell 450 to move relative to the second piston 460, so that the first elastic member 452 is further compressed, and the second piston 460 and the adjusting shell 450 are dislocated with each other, and the damping hole 461 is no longer abutted against the block 453, that is, the damping size generated by the damping hole 461 is the third preset value. At this time, the hydraulic oil can pass through the damping hole 461 and enter the third chamber 430. It can be approximately considered that the hydraulic oil in the first chamber 410 directly enters the third chamber 430. Since S3=100*S1, the transmission force F1 applied by the operator to the first chamber 410 is transmitted to the third chamber 430. After the transmission force F3=100*F1 is transmitted to the extrusion space 310 by the third chamber 430 through the third piston 470, the output of large transmission force is achieved, thereby completing the extrusion between the cable terminal and the copper nose.

[0043] Furthermore, the angle at which the third piston 470 rotates around the second direction is negatively correlated with the diameter of the copper nose, and negatively correlated with the resistance that can be generated by the damping hole 461. For copper noses with different diameters, the smaller the copper nose, the longer the distance that the third piston 470 moves to the left, the larger the angle at which the third piston 470 rotates around its own axis, the smaller the damping hole 461 after rotating to abut against the copper nose, the greater the damping generated by the damping hole 461, and the slower the reset; conversely, the larger the copper nose, the shorter the distance that the third piston 470 moves to the left, the smaller the angle at which the third piston 470 rotates around its own axis, the larger the damping hole 461 after rotating to abut against the copper nose, the smaller the damping generated by the damping hole 461, and the faster the reset.

[0044] In this embodiment, a first one-way valve 411 and a second one-way valve 412 are provided on the first chamber 410. The hydraulic oil in the hydraulic shell 400 can be unidirectionally transmitted to the first chamber 410 through the first one-way valve 411, and the hydraulic oil in the first chamber 410 can be unidirectionally transmitted to the second chamber 420 through the second one-way valve 412.

[0045] In this embodiment, the hydraulic housing 400 and the third chamber 430 are connected via a pressure relief block 432. The pressure relief block 432 has a locked state and an unlocked state. When in the locked state, the hydraulic oil can only flow from the hydraulic housing 400 to the third chamber 430 in one direction; when in the unlocked state, the hydraulic oil in the third chamber 430 and the hydraulic oil in the hydraulic housing 400 can flow with each other. In the initial state, the pressure relief block 432 is in a locked state.

[0046] Specifically, a third one-way valve is disposed on the pressure relief block 432 , the pressure relief block 432 can slide on the third chamber 430 , a valve 401 is disposed on the hydraulic housing 400 , and the pressure relief block 432 is connected to the valve 401 .

[0047] In this embodiment, a pressure relief block 432 is provided. In the initial state, the pressure relief block 432 blocks the hydraulic shell 400 and the third chamber 430. At this time, the hydraulic oil can only flow from the hydraulic shell 400 to the third chamber 430 in one direction through the third one-way valve. That is, when the internal space of the third chamber 430 increases, the hydraulic oil in the hydraulic shell 400 can also enter the third chamber 430 from the third one-way valve.

[0048] After the first locking is completed, the operator drives the pressure relief block 432 to move through the valve 401, so that the pressure relief block 432 switches from the locked state to the unlocked state. At this time, the hydraulic oil in the third chamber 430 and the hydraulic oil in the hydraulic housing 400 can flow with each other, and the first elastic member 452 will also reset and stretch, so that the adjustment housing 450 quickly moves and resets a distance. The hydraulic oil between the adjustment housing 450 and the second chamber 420 will pass through the oil inlet 451, and after passing through the damping hole 461, it will reach the third chamber 430, and then return to the hydraulic housing 400 after passing through the third one-way valve (at this time The damping hole 461 has not yet abutted against the block 453), and the second elastic member 431 will also reset and drive the third piston 470 to move, and the third piston 470 will cause the second piston 460 to move. When the second piston 460 moves to the damping hole 461 and abuts against the block 453, the damping size generated by the damping hole 461 is restored to the second preset value. After that, the hydraulic oil between the regulating shell 450 and the second chamber 420 needs to pass through the damping hole 461 to enter the third chamber 430 after passing through the oil inlet 451, which reduces the resetting speed of the regulating shell 450 and the third piston 470. When the copper nose is locked for the next time, the operator can switch the crimping position, and under the restriction of the damping hole 461, the third piston 470 resets slowly, so that when the copper nose is crimped next time, the third piston 470 can be brought close to the copper nose again without restarting the drive, thereby improving the crimping efficiency of subsequent crimping.

[0049] In this embodiment, the locking housing 300 is provided with a locking rod 320, a first extrusion block 330, and a second extrusion block 340 in sequence along the second direction. The locking rod 320 is fixedly mounted on the locking housing 300, the first extrusion block 330 is fixedly connected to the locking rod 320, and the second extrusion block 340 is connected to the third piston 470, and can move along with the third piston 470 in the second direction and rotate relative to the third piston 470. An extrusion space 310 is defined between the first extrusion block 330 and the second extrusion block 340.

[0050] Specifically, an annular groove is provided on the second extrusion block 340, and an annular protrusion for cooperating with the annular groove is provided on the third piston 470, so that the second extrusion block 340 can move in the second direction with the third piston 470 and rotate relative to the third piston 470. That is, the third piston 470 can rotate around the second direction relative to the second extrusion block 340.

[0051] In this embodiment, a limit rod 402 is provided on the hydraulic shell 400, and the limit rod 402 is provided along the first direction. The adjusting handle 200 is rotatably connected to the limit rod 402. The first piston 440 is slidably installed in the first chamber 410 at one end along the first direction, and the other end along the first direction extends out of the hydraulic shell 400 and is rotatably connected to the adjusting handle 200.

[0052] In this embodiment, the fixed handle 100 has an inner cavity, in which an oil pipe 110 is fixedly arranged, the oil pipe 110 is filled with hydraulic oil, and the hydraulic housing 400 is connected to the oil pipe 110. When in use, the total amount of hydraulic oil can be increased by connecting the oil pipe 110 to the hydraulic housing 400.

[0053] In combination with the above embodiments, the specific working principle and working process are as follows: For the convenience of explanation, the up, down, left and right involved in this article are specifically referred to in the attached Figure 4 , Figure 5 and Figure 6 Up, down, left and right in the middle.

[0054] When in use, the operator holds the fixed handle 100 and continuously pulls and presses the adjusting handle 200. When the adjusting handle 200 is pulled upward, the hydraulic oil in the hydraulic shell 400 will enter the first chamber 410 through the first one-way valve 411. When the adjusting handle 200 is pressed downward, the hydraulic oil in the first chamber 410 will be pressed into the second chamber 420 through the second one-way valve 412. The damping size generated by the damping hole 461 in the initial state is the first preset value. Therefore, a part of the hydraulic oil pressed into the second chamber 420 will cause the entire adjusting shell 450 to move to the left, and cause the second piston 460 to move to the left through the first elastic member 452. The movement of the second piston 460 to the left will cause the third piston 470 to move to the left and compress the second elastic member 431. The movement of the third piston 470 to the left can drive the second extrusion block 340 connected thereto to move synchronously, thereby causing the second extrusion block 340 to approach the first extrusion block 330.

[0055] When the diameters of the first piston 440 and the regulating housing 450 are equal, the oil chamber area of ​​the first chamber 410 is S1, and the oil chamber area of ​​the second chamber 420 is S2, S1=S2, so at this time, the distance that this part of the hydraulic oil drives the regulating housing 450 to move to the left will be transmitted to the third piston 470 through the second piston 460, so that the third piston 470 can move relatively quickly, and then the second extrusion block 340 can move relatively quickly, so that the first extrusion block 330 and the second extrusion block 340 can approach each other. In this process, since the internal space of the third chamber 430 increases, the hydraulic oil in the hydraulic housing 400 can also enter the third chamber 430 from the third one-way valve. At this time, the pressure relief block 432 is in a locked state, and the hydraulic oil can only flow from the hydraulic housing 400 to the third chamber 430 in one direction.

[0056] Another part of the hydraulic oil will enter the regulating housing 450 from the oil inlet 451, and enter the third chamber 430 after passing through the damping hole 461. This part of the hydraulic oil will directly cause the third piston 470 to move leftward, but since the diameter ratio of the third piston 470 to the first piston 440 is 10:1, the oil chamber area inside the third chamber 430 is much larger than the oil chamber area inside the first chamber 410. Assuming that the oil chamber area of ​​the third chamber 430 is S3, S3=100*S1. Therefore, at this time, the distance that this part of the hydraulic oil directly causes the third piston 470 to move leftward is relatively small.

[0057] And as the third piston 470 moves, the spiral transmission between the third piston 470 and the locking shell 300 takes effect, and the third piston 470 will move to the left while rotating around its own axis. Since the third piston 470 is fixedly connected to the second piston 460, the second piston 460 will move synchronously with the third piston 470, and then in the process of the third piston 470 prompting the second extrusion block 340 to move toward the copper nose for clamping, the damping of the damping hole 461 will gradually increase, so the amount of hydraulic oil that can be directly connected to the third chamber 430 through the damping hole 461 will gradually decrease, and the amount of hydraulic oil that directly prompts the adjusting shell 450 to move to the left will gradually increase, and then the movement speed of the third piston 470 will gradually increase until the first extrusion block 330 and the second extrusion block 340 abut against the copper nose. At this time, the damping size generated by the damping hole 461 increases to the second preset value. Because the speed of the movement of the third piston 470 gradually increases, the driving efficiency will be increased when the operator presses and pulls the adjusting handle 200 to drive it, thereby reducing the number of times the operator needs to pull and press the adjusting handle 200 in the process of making the first extrusion block 330 and the second extrusion block 340 abut against the copper nose.

[0058] When the first extrusion block 330 and the second extrusion block 340 abut the copper nose, the operator continues to pull and press the operating handle to cause the adjusting shell 450 to move leftward relative to the second piston 460, so that the first elastic member 452 is further compressed, and the second piston 460 and the adjusting shell 450 are dislocated with each other, and the damping hole 461 is no longer abutted against the block 453, that is, the damping size generated by the damping hole 461 is the third preset value. At this time, the hydraulic oil can pass through the damping hole 461 and enter the third chamber 430. It can be approximately considered that the hydraulic oil in the first chamber 410 directly enters the third chamber 430. Since S3=100*S1, the transmission force F1 applied by the operator to the first chamber 410 is transmitted to the third chamber 430. After the transmission force F1 is transmitted to the third chamber 430, the third chamber 430 transmits the transmission force F3=100*F1 to the second extrusion block 340 through the third piston 470, thereby realizing the output of a large transmission force, thereby completing the extrusion between the cable terminal and the copper nose.

[0059] That is, there is relatively fast movement in the process of locking the copper nose and the cable terminal, and it can be relatively labor-saving when pressing and locking, thereby improving the operating efficiency.

[0060] After the first locking is completed, the operator drives the pressure relief block 432 to move through the valve 401, so that the pressure relief block 432 switches from the locked state to the unlocked state. At this time, the hydraulic oil in the third chamber 430 and the hydraulic oil in the hydraulic housing 400 can flow with each other, and the first elastic member 452 will also reset and stretch, so that the adjustment housing 450 quickly moves rightward and resets a distance. The hydraulic oil between the adjustment housing 450 and the second chamber 420 will pass through the oil inlet 451, and after passing through the damping hole 461, it will reach the third chamber 430, and after passing through the third one-way valve, it will flow back to the hydraulic housing 400 (at this time, the damping hole 461 is closed). 61 has not yet abutted against the block 453), and at this time the second elastic member 431 will also reset and drive the third piston 470 to move right, and prompt the second piston 460 to move right through the third piston 470. When the second piston 460 moves rightward until the damping hole 461 abuts against the block 453, the damping size generated by the damping hole 461 recovers to the second preset value. After that, the hydraulic oil between the adjusting shell 450 and the second chamber 420 needs to pass through the damping hole 461 to enter the third chamber 430 after passing through the oil inlet 451, thereby reducing the reset speed of the adjusting shell 450 and the third piston 470.

[0061] And for copper noses with different diameters, the smaller the copper nose is, the longer the distance that the third piston 470 moves to the left is, the larger the angle at which the third piston 470 rotates around its own axis is, the smaller the damping hole 461 is after rotating to abut against the copper nose, the greater the damping generated by the damping hole 461, and the slower the reset is. Conversely, the larger the copper nose is, the shorter the distance that the third piston 470 moves to the left is, the smaller the angle at which the third piston 470 rotates around its own axis is, the larger the damping hole 461 is after rotating to abut against the copper nose, the smaller the damping generated by the damping hole 461 is, and the faster the reset is. In this way, after the first extrusion block 330 and the second extrusion block 340 complete one crimping of the copper nose and the cable terminal, before the second crimping, when the second extrusion block 340 is reset to leave the copper nose along with the third piston 470, the operator can switch the crimping position. For a relatively small copper nose, the amount of the third piston 470 reset is relatively small. In this way, during the next crimping, the third piston 470 can drive the first extrusion block 330 and the second extrusion block 340 to quickly approach the copper nose again without restarting the drive, thereby improving the crimping efficiency of subsequent crimping.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A cable terminal connection locking device, characterized in that: It includes a fixed handle, an adjusting handle, a locking shell and a hydraulic shell; the hydraulic shell is fixedly connected to the fixed handle, the hydraulic shell is filled with hydraulic oil, and the hydraulic shell is provided with a first chamber, a second chamber and a third chamber; a first piston is slidably arranged in the first chamber, the first piston can reciprocate along a first direction and suck hydraulic oil from the hydraulic shell, and the first direction is a vertical direction; the adjusting handle is used to drive the first piston to reciprocate along the first direction; the first chamber can only transport hydraulic oil to the second chamber, an adjusting shell is slidably arranged in the second chamber, an oil inlet is provided on the adjusting shell, a second piston is slidably connected in the adjusting shell through a first elastic member, both the adjusting shell and the second piston can move in the second direction, the second direction is perpendicular to the first direction, and the second direction is a horizontal direction; the third chamber is communicated with the second chamber, a third piston is slidably connected in the third chamber through a second elastic member, the third piston is fixedly connected to the second piston, and can move along the second direction with the second piston, and the diameter of the first piston is less than or equal to the diameter of the adjusting shell, and the diameter of the adjusting shell is less than the diameter of the third piston; the locking shell is fixedly connected to the hydraulic shell, and is located in the hydraulic shell On the side away from the fixed handle in the second direction, there is an extrusion space in the locking shell, and the movement of the third piston in the second direction can increase or decrease the extrusion space; a damping hole is provided on the second piston, and the damping hole has a first state, a second state and a third state. When in the first state, the damping size generated by the damping hole is a first preset value, when in the second state, the damping size generated by the damping hole is a second preset value, and when in the third state, the damping size generated by the damping hole is a third preset value, the third preset value is smaller than the first preset value, and the first preset value is smaller than the second preset value; in the initial state, the damping hole is in the first state, and a stopper is coaxially arranged inside the adjustment shell. The stopper is a spiral structure, and the two ends along the spiral axis of the stopper are respectively called the first end and the second end, and the size of the first end in the third direction is smaller than the size of the second end in the third direction; the third direction is perpendicular to the first direction and the second direction respectively, and the third direction is a horizontal direction. In the initial state, the damping hole and the first end of the stopper are sequentially arranged in the second direction and abut against each other, and the third piston can rotate around the second direction while moving in the second direction.

2. A cable terminal connection locking device according to claim 1, characterized in that: The locking shell and the third piston are spirally driven.

3. A cable terminal connection locking device according to claim 2, characterized in that: The angle at which the third piston rotates around the second direction is negatively correlated with the diameter of the copper nose and negatively correlated with the resistance that the damping hole can generate.

4. A cable terminal connection locking device according to claim 1, characterized in that: The first chamber is provided with a first one-way valve and a second one-way valve. The hydraulic oil in the hydraulic housing can be unidirectionally transmitted to the first chamber through the first one-way valve, and the hydraulic oil in the first chamber can be unidirectionally transmitted to the second chamber through the second one-way valve.

5. A cable terminal connection locking device according to claim 1, characterized in that: The hydraulic shell and the third chamber are connected through a pressure relief block, which has a locked state and an unlocked state. When in the locked state, the hydraulic oil can only flow from the hydraulic shell to the third chamber in one direction; when in the unlocked state, the hydraulic oil in the third chamber and the hydraulic oil in the hydraulic shell can flow with each other; in the initial state, the pressure relief block is in a locked state.

6. A cable terminal connection locking device according to claim 5, characterized in that: A third one-way valve is arranged on the pressure relief block, the pressure relief block can slide on the third chamber, a valve is arranged on the hydraulic shell, and the pressure relief block is connected to the valve.

7. A cable terminal connection locking device according to claim 1, characterized in that: A locking rod, a first extrusion block and a second extrusion block are sequentially arranged on the locking shell along the second direction. The locking rod is fixedly installed on the locking shell, the first extrusion block is fixedly connected to the locking rod, and the second extrusion block is connected to the third piston. The second extrusion block can move in the second direction with the third piston and rotate relative to the third piston; an extrusion space is defined between the first extrusion block and the second extrusion block.

8. A cable terminal connection locking device according to claim 1, characterized in that: A limit rod is arranged on the hydraulic shell, the limit rod is arranged along the first direction, the adjustment handle is rotatably connected to the limit rod, one end of the first piston along the first direction is slidably installed in the first chamber, and the other end along the first direction extends out of the hydraulic shell and is rotatably connected to the adjustment handle.

9. A cable terminal connection locking device according to claim 1, characterized in that: The fixed handle has an inner cavity, in which an oil pipe is fixedly arranged, the oil pipe is filled with hydraulic oil, and the hydraulic shell is communicated with the oil pipe.

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