Winding speed control device

Abstract

The utility model discloses a winding speed control device and relates to the technical field of winding devices, the winding speed control device comprises a cylinder body and a piston body, a piston part of the piston body is connected with an inner cavity of the cylinder body in a matched mode to divide the inner cavity of the cylinder body into a first cavity and a second cavity, and a connecting shaft connected to one end of the piston part penetrates out of the cylinder body; a communication channel communicated with the first cavity and the second cavity is formed in the piston body, the cylinder body is filled with flowing media, a control valve element in clearance fit and two elastic damping devices acting on the corresponding ends of the control valve element are arranged in the communication channel, and when the piston body does not move, the pressure at the two ends of the control valve element is balanced. The control valve core can move back and forth along the communication channel; when the piston body moves, a medium is driven to flow, the medium flows to push the control valve element to directionally move to be close to the corresponding matching end, and the flow speed is adjusted by changing the size of a gap between the control valve element and the corresponding matching end so as to control the speed. The system is low in cost, stable in performance and convenient to maintain.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of winding device, in particular to a winding speed control device. BACKGROUND

[0002] In many industries, winding and unwinding devices are used, such as the production and use of power cables, wire pipes, steel wire ropes, cloth, film, etc. The traditional winding device drives the rotation of the rotating shaft to wind or / and unwind. Sometimes, in order to slow down the rotating shaft during rotation, a speed reduction damping structure is needed to prevent the rotating shaft from rotating too fast. The damping speed reduction schemes on the market are mainly torque motors for controlling the unwinding speed, permanent magnet brakes for damping speed reduction, or mechanical contact damping devices. The use of torque motors and permanent magnet brakes increases the production cost and the burden of enterprises. Moreover, non-professionals cannot repair them once a problem occurs, which makes assembly and maintenance very difficult. The mechanical contact damping device wears out quickly and has a short service life. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the present application provides a winding speed control device to solve the technical problems of high cost or short service life of the speed reduction damping device in the existing winding device.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0005] A winding speed control device includes a cylinder body and a piston body. The piston part of the piston body is connected with the inner cavity of the cylinder body to divide the inner cavity of the cylinder body into a first cavity and a second cavity. A connecting shaft connected to one end of the piston part penetrates the cylinder body. A communication passage is arranged in the piston body and communicates the first cavity and the second cavity. The cylinder body is filled with a flow medium. A control valve core and two elastic damping devices acting on the corresponding ends of the control valve core are arranged in the communication passage in a clearance fit. When the piston body is stationary, the pressure at both ends of the control valve core is balanced, and the control valve core can move forward and backward along the communication passage. When the piston body moves, the medium flows, which pushes the control valve core to move directionally and approach the corresponding fitting end. The flow rate is adjusted to control the speed by changing the gap size between the control valve core and the corresponding fitting end.

[0006] Further, the stiffness of the two elastic damping devices is different.

[0007] Further, the control valve core is columnar.

[0008] Further, the communication passage includes a valve core installation passage extending along the axial direction of the piston body. The two ends of the valve core installation passage are connected with the first cavity and the second cavity through corresponding through passages. The control valve core and the two elastic damping devices are limited in the valve core installation passage.

[0009] Further, the open end of the valve core mounting channel is provided with a limiting nut abutting against the corresponding elastic damping device.

[0010] Further, the extending shaft connected to the other end of the piston part penetrates the cylinder body, the extending shaft is provided with an adjusting channel communicating with the corresponding through channel, the adjusting channel is provided with an adjusting valve capable of moving in the axial direction, and the effective volume size of the corresponding through channel is adjusted by moving the adjusting valve.

[0011] Further, the limiting nut is located in the through channel communicating with the adjusting channel

[0012] Further, the elastic damping device is a spring.

[0013] Further, the sealing rings are arranged between the piston body and the cylinder body and between the adjusting valve and the piston body.

[0014] From the above technical scheme, it can be seen that the advantages of the utility model are:

[0015] 1. In the application, the medium flow will push the control valve core to move directionally to approach the corresponding matching end, and then the flow rate is adjusted to control the speed by changing the gap size between the control valve and the corresponding matching end, which is simple in structure, low in cost, convenient to maintain, small in wear and long in service life compared with the existing friction contact.

[0016] 2. In the application, the position of the adjusting valve can be used to change the effective volume size of the corresponding through channel, so as to realize speed adjustment. DRAWINGS

[0017] The drawings constituting a part of the application are used to provide further understanding of the application, the illustrative embodiments of the application and the description thereof are used to explain the application, and do not constitute improper limitation on the application.

[0018] Figure 1 It is a structural schematic view of the application.

[0019] Explanation of reference signs: 1-cylinder body; 11-cylinder barrel; 12-first sealing end cover; 13-second sealing end cover; 2-piston body; 21-connecting shaft; 22-piston part; 23-extending shaft; 24-first channel part; 25-second channel part; 26-valve core mounting channel; 27-third channel part; 28-fourth channel part; 3-control valve core; 4-first elastic damping device; 5-second elastic damping device; 6-adjusting valve; 7-limiting nut; 8-sealing ring. DETAILED DESCRIPTION

[0020] For the purpose, technical solutions and advantages of the present application to be more clearly understood, further detailed description of the present application is made below in conjunction with the embodiments and drawings. Herein, the illustrative embodiments of the present application and their descriptions are used to explain the present application but not as a limitation of the present application.

[0021] Reference Figure 1 As Figure 1 shown, the present embodiment provides a winding speed control device, which comprises a cylinder body 1 and a piston body 2, a piston part 22 of the piston body 2 is connected with an inner cavity of the cylinder body 1 to divide the inner cavity of the cylinder body 1 into a first cavity and a second cavity, a connecting shaft 21 connected to one end of the piston part 22 penetrates through the cylinder body 1, a communication passage is arranged in the piston body 2 to communicate the first cavity and the second cavity, the cylinder body 1 is filled with a flowing medium, a control valve core 3 and two elastic damping devices respectively acting on corresponding ends of the control valve core 3 are arranged in the communication passage in a clearance fit, when the piston body 2 is stationary, the pressures at both ends of the control valve core 3 are balanced, the control valve core 3 can move forward and backward along the communication passage to make the communication passage in a communication state; when the piston body 2 moves, the medium flows, the medium flow pushes the control valve core 3 to move directionally to approach the corresponding fitting end, the medium flow rate is adjusted by changing the size of the clearance between the control valve core 3 and the corresponding fitting end to realize the speed control of the piston body 2. In use, the cylinder body 1 is fixedly connected or hinged, the connecting shaft 21 is connected with an execution part, wherein the execution part is an eccentric wheel or a sliding block, the execution part is used to drive the piston part 22 to reciprocate. The winding speed control device of the present application has low cost and is convenient to maintain compared with the torque motor and the permanent magnet brake in the prior art, has low wear and long service life compared with the existing friction contact, and is convenient to maintain.

[0022] In the present application, the cylinder body 1 comprises a cylinder barrel 11 and first and second sealing end covers 12 and 13 which are separately connected to the openings at both ends of the cylinder barrel 11, so that the cylinder body 1 is simple to manufacture.

[0023] In the present application, the stiffness of the two elastic damping devices is different, after the direction in which the piston body 2 needs to be controlled to slow down is determined, the elastic damping device with smaller stiffness is arranged at the drainage end in the slowing down direction, the elastic damping device with smaller stiffness is easy to deform, when the control valve core 3 is pushed to move by the high-pressure medium, the position of the control valve core 3 is adjusted at a fast speed and a large stroke, and the smaller the throttling clearance is, the better the throttling effect is.

[0024] In the present application, the two elastic damping devices can also be arranged to approach the corresponding side by length difference, when the elastic damping device with smaller length is compressed and deformed, the elastic force to be overcome is small, and then the adjustment of the size of the throttling clearance is faster and the reaction is more sensitive.

[0025] In the present application, when the performance parameters of the two elastic damping devices are consistent, bidirectional speed reduction can also be realized.

[0026] In the present application, the two elastic damping devices are respectively a first elastic damping device 4 and a second elastic damping device 5, wherein the elastic damping device can be a spring or an elastic assembly or a soft rubber or silica gel support.

[0027] In the present application, the elastic damping device is preferably a spring.

[0028] In the present application, the control valve core 3 is in a columnar shape, and an annular gap channel is formed between the circumferential surface of the control valve core 3 and the inner wall of the communication channel, wherein both ends of the control valve core 3 have blind holes for inserting the corresponding springs, which facilitates the guiding and limiting of the springs.

[0029] In the present application, the communication channel includes a valve core installation channel 26 extending in the axial direction of the piston body 2, both ends of the valve core installation channel 26 are connected with the first cavity and the second cavity through the corresponding through channels, and the control valve core 3 and the two elastic damping devices are limited in the valve core installation channel 26. With this structure, when the control valve core 3 slides under the action of the medium, it will approach the corresponding end surface of the valve core installation channel 26, the closer it is, the smaller the gap between the control valve core 3 and the corresponding end surface of the valve core installation channel 26, the better the throttling effect, the lower the flow, the higher the pressure at the high-pressure end, which hinders the movement of the piston body 2 to the high-pressure end, and the speed of the piston body 2 is reduced, thereby reducing the speed of the actuator.

[0030] In the present application, one scheme using a limiting nut is that the end of the valve core installation channel 26 away from the connecting shaft 21 is in an open state, the open end of the valve core installation channel 26 is provided with a limiting nut 7 abutting against the corresponding elastic damping device, and the core hole of the limiting nut 7 is in communication with the inner cavity of the cylinder body 1. By using the limiting nut 7, the control valve core 3 and the two elastic damping devices are convenient to disassemble and assemble.

[0031] In the embodiment of the present application, the extension shaft 23 connected to the other end of the piston part 22 penetrates the cylinder body 1, the extension shaft 23 is provided with an adjusting channel in communication with the corresponding through channel, the adjusting channel is provided with an adjusting valve 6 capable of moving in the axial direction, the effective volume size of the corresponding through channel is adjusted by moving the adjusting valve 6, thereby increasing or reducing the effective volume of the winding speed control device, when the volume is larger, the medium pressure is reduced, when the piston part 22 moves in the deceleration direction, the pressure acting on the control valve core 3 is small, thereby the movement stroke of the control valve core 3 will be smaller, the throttling gap will be larger, the damping force will be smaller, the movement speed of the piston part 22 will be larger, and vice versa, the damping force will be larger, and the movement speed of the piston part 22 will be smaller.

[0032] In the present application, the limiting nut 7 is located in the through channel in communication with the adjusting channel, and with this structure, the control valve core 3 and the elastic damping device can be replaced without disassembling the cylinder body 1, and the structure is more compact.

[0033] In the present application, sealing rings 8 are arranged between the piston body 2 and the cylinder body 1 and between the adjusting valve 6 and the piston body 2, so that the sealing performance is high.

[0034] In the present embodiment, the sealing ring 8 is preferably a Y-shaped sealing ring.

[0035] In the present embodiment, the first cavity is located at one end close to the connecting shaft 21, the through channel communicating with the first cavity comprises a first channel portion 24 arranged in the radial direction on the connecting shaft 21 and a second channel portion 25 arranged in the axial direction, the first channel portion 24 communicates with the valve core mounting channel 26 through the second channel portion 25, the diameter of the second channel portion 25 is smaller than the diameter of the valve core mounting channel 26, one end of the valve core mounting channel 26 away from the second channel portion 25 communicates with a third channel portion 27 having a diameter greater than or equal to the diameter of the valve core mounting channel 26, the third channel portion 27 extends to the outer surface of the piston body 2, the limiting nut 7 having a central hole is mounted in the third channel portion 27, and the diameter of the central hole of the limiting nut 7 is smaller than the diameter of the valve core mounting channel 26, in order to supplement or replace the medium, the adjusting channel is generated by arranging the hollow extension shaft 23, the fourth channel portion 28 arranged in the radial direction and communicating with the third channel portion 27 is arranged on the extension shaft 23, the fourth channel portion 28 is located between the limiting nut 7 and the adjusting valve 6, the first elastic damping device 4 with smaller rigidity is located at one end close to the second channel portion 25, and the second elastic damping device 5 with larger rigidity is located at one end close to the limiting nut 7.

[0036] In use, when the connecting shaft 21 is pressed, the medium in the second cavity will enter the first cavity through the communicating channel, the medium flowing in the process will push the control valve core 3 to be close to the second channel portion 25 to throttle, and the piston portion 22 is throttled to reduce the speed; when the connecting shaft 21 is pulled, the medium in the first cavity will enter the second cavity through the communicating channel, the medium flowing in the process will push the control valve core 3 to be close to the limiting nut 7, the second elastic damping device 5 with larger rigidity makes the gap between the control valve core 3 and the limiting nut 7 not too small, so that the throttling effect is poor, and the speed change of the piston portion 22 is small; when reverse deceleration is needed, the positions of the two elastic damping devices can be exchanged to achieve the reverse deceleration.

[0037] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the embodiments of the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A reeling speed control device characterized by comprising: The application relates to a cylinder-piston unit, which comprises a cylinder (1) and a piston body (2), wherein a piston part (22) of the piston body (2) is connected with an inner cavity of the cylinder (1) to divide the inner cavity of the cylinder (1) into a first cavity and a second cavity, a connecting shaft (21) connected to one end of the piston part (22) penetrates the cylinder (1), a communication channel for communicating the first cavity and the second cavity is arranged in the piston body (2), a control valve core (3) and two elastic damping devices acting on corresponding ends of the control valve core (3) are arranged in the communication channel in a clearance fit, when the piston body (2) is stationary, the pressures at the two ends of the control valve core (3) are balanced, and the control valve core (3) can move back and forth along the communication channel; when the piston body (2) moves, the medium flows, the medium flow pushes the control valve core (3) to move directionally and approach the corresponding fitting end, and the flow rate is adjusted to realize speed control by changing the clearance size between the control valve core (3) and the corresponding fitting end.

2. The reeling speed control device according to claim 1, wherein The two elastic damping devices have different rigidity sizes.

3. The reeling speed control device according to claim 1, wherein The control valve core (3) is in a columnar shape.

4. The reeling speed control device according to claim 3, wherein The communication channel comprises a valve core mounting channel (26) extending along the axial direction of the piston body (2), the two ends of the valve core mounting channel (26) are connected with the first cavity and the second cavity through corresponding through channels, and the control valve core (3) and the two elastic damping devices are limited in the valve core mounting channel (26).

5. The reeling speed control device according to claim 4, wherein The open end of the valve core mounting channel (26) is provided with a limiting nut (7) abutting against the corresponding elastic damping device.

6. The reeling speed control device according to claim 5, wherein An extension shaft (23) connected to the other end of the piston part (22) penetrates the cylinder (1), the extension shaft (23) is provided with an adjusting channel communicating with the corresponding through channel, an adjusting valve (6) capable of moving along the axial direction is arranged in the adjusting channel, and the effective volume size of the corresponding through channel is adjusted by moving the adjusting valve (6).

7. The reeling speed control device according to claim 6, wherein The limiting nut (7) is located in the through channel communicating with the adjusting channel.

8. The reeling speed control device according to claim 1, wherein The elastic damping device is a spring.

9. The reeling speed control device according to claim 6, wherein Sealing rings (8) are arranged between the piston body (2) and the cylinder (1) and between the adjusting valve (6) and the piston body (2).

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