Heavy-load hydraulic normally-closed clutch

Abstract

The utility model discloses a heavy-load hydraulic normally-closed clutch, which belongs to the technical field of industrial brakes and comprises a shaft tube, a connecting disc rotationally sleeved at one end of the shaft tube, a dual steel disc axially moving in the connecting disc, and a friction plate axially moving on the shaft tube and used for being in contact with the dual steel disc, under the action of the brake spring, the push disc and the piston axially move leftwards, the push disc pushes the friction plate to be tightly combined with the dual steel disc, and the clutch is in a combined state; after the pressure source is filled with oil, the cylinder body is pressurized through the air inlet hole, and the piston pushes the push disc arranged on the side face to axially move rightwards under the action of pressure, so that the multiple groups of dual steel sheets are separated from the friction plates, the clutch is in a separated state, and the clutch is released to transmit the torque at the moment; the inner disc is transferred to the outer disc through the buffer spring, and at the moment, the buffer spring plays a role in buffering and damping.

Description

Technical Field

[0001] This application relates to the technical field of industrial brakes, and specifically to a heavy-duty hydraulic normally closed clutch. Background Art

[0002] A brake is a commonly used component in mechanical transmissions and can separate or engage the transmission system at any time. As shown in the traditional friction brake Figure 3 which is a friction type hydraulic normally open clutch. Its principle is that when engaging, the driving component 7' pushes the piston 6' to move axially. The piston 6' pushes the driving disc 5' to move. The driving disc 5' causes the friction plates 4' and the steel plates 3' to move axially along the external spline of the shaft tube 1' and press against each other. Power is output via multiple groups of friction plates 4' and the connecting disc 2'. When disengaging, after the driving component 7' cuts off the oil, under the action of the restoring force of the separating disc spring 8', the steel plates 3' and the friction plates 4' are reset and separated, and the clutch disconnects to work. Although it can achieve the braking purpose, in the working conditions that require long-term engagement, it is necessary to ensure that the driving cylinder is always ventilated and in the working state, and it is difficult to continuously control the stability of the pressure in the cylinder. When the pressure in the cylinder decreases, the torque drops, which easily causes the clutch to fail to work. Moreover, the connecting disc does not have a buffer and shock absorption structure and cannot buffer and shock absorb, so its service life is relatively short.

[0003] Therefore, this application provides a heavy-duty hydraulic normally closed clutch to solve the above problems. Summary of the Utility Model

[0004] This application provides a heavy-duty hydraulic normally closed clutch, aiming to solve the problems in the background art that in the working conditions that require long-term engagement of the existing normally open clutch, it is necessary to ensure that the driving cylinder is always ventilated and in the working state, it is difficult to continuously control the stability of the pressure in the cylinder. When the pressure in the cylinder decreases, the torque drops, which easily causes the clutch to fail to work. Moreover, the connecting disc does not have a buffer and shock absorption structure and cannot buffer and shock absorb, so its service life is relatively short.

[0005] To achieve the above object, this application provides the following technical solution: A heavy-duty hydraulic normally closed clutch includes a shaft tube, a connecting disc rotatably sleeved at one end of the shaft tube, a pair of steel plates axially moving in the connecting disc, friction plates axially moving on the shaft tube for contacting the pair of steel plates, a push plate axially moving on the shaft tube for pushing the friction plates and the pair of steel plates to move close to the connecting disc, and a driving mechanism sleeved on the shaft tube for driving the push plate to move.

[0006] Preferably, in order to ensure that the driving cylinder is always ventilated and in a working state in working conditions that require long-term engagement, it is difficult to continuously control the stability of the pressure inside the cylinder. When the pressure inside the cylinder decreases, the torque drops, which easily leads to the problem that the clutch cannot work. The driving mechanism includes a cylinder body rotatably sleeved at one end of the shaft tube away from the connecting disc, a piston sleeved on the cylinder body and connected to the push plate, a support disc fixedly sleeved on the shaft tube at a position corresponding to the end of the cylinder body close to the push plate, and a brake spring with two ends respectively connected to the support disc and the push plate for driving the push plate to move close to the connecting disc. An air inlet hole is formed in the piston for inflating the piston to push the push plate to move away from the connecting disc; wherein, the push plate is rotatably connected to the piston. When there is no pressure source, under the action of the brake spring, the push plate and the piston move axially to the left, and the push plate pushes the friction plate and the mating steel sheet to be closely combined, and the clutch is in a combined state; at this time, no torque is transmitted; when the pressure source supplies oil, the cylinder body is pressurized through the air inlet hole, and under the action of the pressure, the piston pushes the push plate arranged on the side to move axially to the right, so that multiple groups of mating steel sheets are separated from the friction plate, and the clutch will be in a separated state. At this time, the clutch is released and torque is transmitted. When it is necessary to combine again, after cutting off the oil supply of the pressure source of the cylinder body, the piston moves to the left under the action of the brake spring, so that the push plate presses multiple groups of mating steel sheets and friction plates, and the clutch is combined again, which is suitable for working conditions that require long-term engagement.

[0007] Preferably, in order to solve the problem that the connecting disc does not have a buffer and shock absorption structure, cannot buffer and shock absorb, and has a relatively short service life, the connecting disc includes an outer disc and an inner disc that rotates axially inside the outer disc. At least one first support edge that extends radially inward and contacts the outer wall of the inner disc is provided on the inner wall of the outer disc. At least one second support edge that extends radially outward and contacts the inner disc of the outer disc is provided on the outer wall of the inner disc. A rectangular groove is formed at one end where the second support edge and the adjacent first support edge are close to each other. A buffer spring is arranged in the rectangular groove, and two ends of the buffer spring are respectively fixedly connected to the first support edge and the second support edge. During the process of transmitting torque, the inner disc is transmitted to the outer disc through the buffer spring, and at this time, the buffer spring plays a role in buffering and shock absorption.

[0008] Preferably, in order to solve the problem of braking performance, the shaft tube is connected to the friction plate through a spline sleeve, and multiple groups of the mating steel sheets and multiple groups of the friction plates are arranged in a cross manner. The multiple groups of cross-arranged mating steel sheets and the friction plate driven by the shaft tube through the spline sleeve rub against each other to improve the braking performance.

[0009] Preferably, in order to solve the problem of cylinder body sealing, two sealing rings for sealing the cylinder body are arranged between the cylinder body and the piston. By arranging the sealing rings, the airtightness of the cylinder body can be improved, and it is convenient to use.

[0010] Preferably, to solve the problem of convenient installation, the push plate and the piston are connected by a precision bearing arranged outside the push plate and the piston. The push plate and the piston are installed and fixed through the precision bearing, and the split design facilitates the installation operation.

[0011] Preferably, to solve the problem of convenient installation of the brake spring, an installation groove for installing and fixing the brake spring is provided inside the push plate. The installation of the brake spring is facilitated through the provided installation groove, and it is convenient to use.

[0012] In this heavy-duty hydraulic normally-closed clutch, when there is no pressure source, under the action of the brake spring, the push plate and the piston move axially to the left, and the push plate pushes the friction plate and the mating steel plate to be closely combined, and the clutch is in the engaged state; at this time, no torque is transmitted; when the pressure source is supplied with oil, the cylinder body is pressurized through the air inlet hole. Under the action of the pressure, the piston pushes the push plate arranged on the side to move axially to the right, so that multiple groups of mating steel plates are separated from the friction plate, and the clutch will be in the disengaged state. At this time, the clutch is released and torque is transmitted. When it is necessary to engage again, after cutting off the oil supply of the pressure source of the cylinder body, the piston moves to the left under the action of the brake spring, so that the push plate presses multiple groups of mating steel plates and the friction plate, and the clutch is engaged again, which is suitable for the working condition of long-term engagement.

[0013] In this heavy-duty hydraulic normally-closed clutch, during the process of torque transmission, the inner disc is transmitted to the outer disc through the buffer spring. At this time, the buffer spring plays a role in buffering and shock absorption. Description of the Drawings

[0014] Figure 1 It is a front view structural schematic diagram of a heavy-duty hydraulic normally-closed clutch;

[0015] Figure 2 It is a structural schematic diagram of the buffer spring of a heavy-duty hydraulic normally-closed clutch;

[0016] Figure 3 It is a front view structural schematic diagram of a friction-type hydraulic normally-open clutch.

[0017] In the figure:

[0018] 1. Shaft tube; 2. Connection plate; 21. Outer disc; 211. First support edge; 22. Inner disc; 221. Second support edge; 23. Rectangular groove; 24. Buffer spring; 3. Mating steel plate; 4. Friction plate; 5. Push plate; 51. Installation groove; 6. Driving mechanism; 61. Cylinder body; 62. Piston; 621. Air inlet hole; 63. Support plate; 64. Brake spring; 7. Sealing ring; 8. Precision bearing. Detailed Embodiments

[0019] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0020] Embodiment 1

[0021] This embodiment provides a heavy-duty hydraulic normally-closed clutch. As Figures 1-3 shown, the heavy-duty hydraulic normally-closed clutch includes a shaft tube 1, a connecting disk 2 rotatably sleeved at one end of the shaft tube 1, a pair of steel sheets 3 axially moving within the connecting disk 2, a friction plate 4 axially moving on the shaft tube 1 and used to contact the pair of steel sheets 3, a push disk 5 axially moving on the shaft tube 1 and used to push the friction plate 4 and the pair of steel sheets 3 to move closer to the connecting disk 2, and a driving mechanism 6 sleeved on the shaft tube 1 and used to drive the push disk 5 to move.

[0022] During use, the driving mechanism 6 is set to push the push disk 5 to axially move. Through the push disk 5, the pair of steel sheets 3 and the friction plate 4 are pressed together, so as to transmit the acting force to the connecting disk 2, and the shaft tube 1 is braked through the connecting disk 2, thereby achieving the purpose of braking.

[0023] Specifically, the driving mechanism 6 includes a cylinder block 61 rotatably sleeved at the end of the shaft tube 1 away from the connecting disk 2, a piston 62 sleeved on the cylinder block 61 and connected to the push disk 5, a support disk 63 fixedly sleeved on the shaft tube 1 at a position corresponding to the end of the cylinder block 61 close to the push disk 5, and a braking spring 64 with two ends respectively connected to the support disk 63 and the push disk 5 and used to drive the push disk 5 to move closer to the connecting disk 2. An air inlet hole 621 is opened on the piston 62 for inflating the piston 62 to make the piston 62 push the push disk 5 to move away from the connecting disk 2. Among them, the push disk 5 is rotatably connected to the piston 62.

[0024] During use, when there is no pressure source, under the action of the braking spring 64, the push disk 5 and the piston 62 axially move to the left. The push disk 5 pushes the friction plate 4 to closely combine with the pair of steel sheets 3, and the clutch is in the combined state; at this time, no torque is transmitted. When the pressure source supplies oil, the cylinder block 61 is pressurized through the air inlet hole 621. Under the action of the pressure, the piston 62 pushes the push disk 5 arranged on the side to axially move to the right, so that multiple pairs of steel sheets 3 are separated from the friction plate 4, and the clutch will be in the separated state. At this time, the clutch is released and torque is transmitted. When it is necessary to combine again, after cutting off the oil supply of the pressure source of the cylinder block 61, the piston 62 moves to the left under the action of the braking spring 64, so that the push disk 5 presses multiple pairs of steel sheets 3 and the friction plate 4, and the clutch is combined again, which is suitable for working conditions with long-term combination.

[0025] Further, the connecting disc 2 includes an outer disc 21 and an inner disc 22 that rotates axially inside the outer disc 21. At least one first support edge 211 that extends radially inward and contacts the outer wall of the inner disc 22 is provided on the inner wall of the outer disc 21. At least one second support edge 221 that extends radially outward and contacts the inner wall of the outer disc 21 is provided on the outer wall of the inner disc 22. A rectangular groove 23 is formed at one end where the second support edge 221 and the adjacent first support edge 211 are close to each other. A buffer spring 24 is arranged in the rectangular groove 23. Both ends of the buffer spring 24 are fixedly connected to the first support edge 211 and the second support edge 221 respectively;

[0026] During use, in the process of transmitting torque, the inner disc 22 is transmitted to the outer disc 21 through the buffer spring 24. At this time, the buffer spring 24 plays a role in buffering and shock absorption.

[0027] Furthermore, the shaft tube 1 and the friction plate 4 are connected through a spline sleeve, and multiple groups of mating steel sheets 3 and multiple groups of friction plates 4 are arranged in a cross pattern. The braking performance is improved by the mutual friction between the multiple groups of cross - arranged mating steel sheets 3 and the friction plates 4 driven by the shaft tube 1 through the spline sleeve.

[0028] Wherein, two sealing rings 7 for sealing the cylinder block 61 are arranged between the cylinder block 61 and the piston 62. By arranging the sealing rings 7, the airtightness of the cylinder block 61 can be improved, which is convenient to use.

[0029] It should be noted that the push plate 5 and the piston 62 are connected through a precision bearing 8 arranged outside the push plate 5 and the piston 62. The push plate 5 and the piston 62 are installed and fixed through the precision bearing 8. The split - type design is convenient for installation and operation.

[0030] Further, an installation groove 51 for installing and fixing the braking spring 64 is formed inside the push plate 5. By arranging the installation groove 51, it is convenient to install the braking spring 64, which is convenient to use.

[0031] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application, according to the technical solution and its concept of the present application, makes equivalent substitutions or changes, and should be covered by the protection scope of the present application.

Claims

1. An overloaded hydraulic normally closed clutch, comprising a shaft tube (1), a connecting disc (2) rotatably sleeved at one end of the shaft tube (1), a pair of steel sheets (3) axially moving within the connecting disc (2), a friction plate (4) axially moving on the shaft tube (1) for contacting the pair of steel sheets (3), a push disc (5) axially moving on the shaft tube (1) for pushing the friction plate (4) and the pair of steel sheets (3) to move closer to the connecting disc (2), and a driving mechanism (6) sleeved on the shaft tube (1) for driving the push disc (5) to move. It is characterized in that: The driving mechanism (6) includes a cylinder block (61) rotatably sleeved at the end of the shaft tube (1) away from the connecting disc (2), a piston (62) sleeved on the cylinder block (61) and connected to the push disc (5), a support disc (63) fixedly sleeved on the shaft tube (1) at a position corresponding to the end of the cylinder block (61) close to the push disc (5), and a brake spring (64) with two ends respectively connected to the support disc (63) and the push disc (5) for driving the push disc (5) to move closer to the connecting disc (2). An air inlet hole (621) is provided on the piston (62) for inflating the piston (62) to make the piston (62) push the push disc (5) to move away from the connecting disc (2). Wherein, the push disc (5) is rotatably connected to the piston (62). The connecting disc (2) includes an outer disc (21) and an inner disc (22) axially rotating inside the outer disc (21). At least one first support edge (211) radially extending inwards and contacting the outer wall of the inner disc (22) is provided on the inner wall of the outer disc (21). At least one second support edge (221) radially extending outwards and contacting the inner disc of the outer disc (21) is provided on the outer wall of the inner disc (22). A rectangular groove (23) is formed at one end where the second support edge (221) is close to its adjacent first support edge (211). A buffer spring (24) is arranged in the rectangular groove (23), and two ends of the buffer spring (24) are respectively fixedly connected to the first support edge (211) and the second support edge (221).

2. The heavy-duty hydraulic normally-closed clutch according to claim 1, wherein: The shaft tube (1) is connected to the friction plate (4) through a spline sleeve, and multiple groups of the pair of steel sheets (3) and multiple groups of the friction plates (4) are arranged in a cross manner.

3. The heavy-duty hydraulic normally closed clutch according to claim 1, wherein: Two sealing rings (7) for sealing the cylinder block (61) are arranged between the cylinder block (61) and the piston (62).

4. The heavy-duty hydraulic normally-closed clutch according to claim 1, characterized in that: The push disc (5) is connected to the piston (62) through a precision bearing (8) arranged outside the push disc (5) and the piston (62).

5. The heavy-duty hydraulic normally closed clutch according to claim 1, wherein: An installation groove (51) for installing and fixing the brake spring (64) is provided inside the push disc (5).

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