Step-by-step clutch separating mechanism

Abstract

The utility model relates to a step-by-step clutch separating mechanism which comprises a separating bearing matched with a clutch, a cylinder body coaxial with the separating bearing, a first piston body and a second piston body, and the separating bearing is installed at the front end of the second piston body. A first air cavity is formed between the cylinder body and the first piston body and used for introducing compressed air and pushing the first piston body, the second piston body and the release bearing to move towards the clutch in the axial direction at the same time through the compressed air. A second air cavity is formed between the first piston body and the second piston body, and the second air cavity is used for introducing compressed air and pushing the second piston body and the release bearing to move towards the clutch in the axial direction through the compressed air. An independent air cavity is formed between the first piston body and the cylinder body, an independent air cavity is formed between the second piston body and the first piston body, the clutch is separated step by step by injecting compressed air into the air cavities, large separation force can be provided, rapid separation and slow and stable joint can be achieved, and the clutch is suitable for medium-sized and large-sized vehicles.

Description

Technical Field

[0001] The utility model relates to a step-by-step clutch separation mechanism. Background Art

[0002] The clutch is a common component in mechanical transmissions, used to enable the transmission system to engage and disengage at will. The clutch release mechanism is highly integrated, with complex processes and structures. In typical vehicles, gear shifting occurs by disengaging and engaging the clutch, with a temporary interruption in power transmission between engagement and disengagement. For medium and large vehicles, this brief interruption in power transmission can lead to serious safety accidents, and the clutch release mechanism is limited in its use on high-torque vehicles. Therefore, it is necessary to design a simple release mechanism suitable for medium and large vehicles that can provide a strong disengagement force during the disengagement phase and a slow, smooth, and controlled engagement phase. Utility Model Content

[0003] The present invention aims to improve the problems existing in the prior art, that is, the technical problem to be solved by the present invention is to provide a step-by-step clutch release mechanism.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a step-by-step clutch release mechanism, including a release bearing that cooperates with the clutch, and also including a cylinder body, a first piston body and a second piston body coaxially arranged with the release bearing, and the release bearing is installed at the front end of the second piston body; a first air cavity is provided between the cylinder body and the first piston body, and the first air cavity is used to allow compressed air to pass through and push the first piston body, the second piston body and the release bearing to move axially toward the clutch at the same time through the compressed air; a second air cavity is provided between the first piston body and the second piston body, and the second air cavity is used to allow compressed air to pass through and push the second piston body and the release bearing to move axially toward the clutch through the compressed air.

[0005] Furthermore, the cylinder body includes a cylinder base coaxially sleeved on the outside of the rear end of the first piston body, and a first air cavity is formed between the peripheral side of one end of the first piston body extending into the interior of the cylinder base and the cylinder base; the first piston body is coaxially sleeved on the outside of the second piston body, and a second air cavity is formed between the peripheral side of the second piston body and the first piston body.

[0006] Furthermore, a first air vent is provided on the side of the cylinder base to facilitate the entry and exit of compressed gas, and the first air vent is connected to the first air cavity; a second air vent is provided on the side of the first piston body to facilitate the entry and exit of compressed gas, and the second air vent is connected to the second air cavity.

[0007] Furthermore, a pair of first sealing rings are provided between the circumferential side of the first piston body and the cylinder base, the pair of first sealing rings are distributed along the axial direction of the first piston body, and the pair of first sealing rings are respectively located at the front and rear ends of the first air cavity; a pair of second sealing rings are provided between the circumferential side of the second piston body and the first piston body, the pair of second sealing rings are distributed along the axial direction of the second piston body, and the pair of second sealing rings are respectively located at the front and rear ends of the second air cavity.

[0008] Furthermore, an outer limit flange is provided on the peripheral side of the first piston body; an outer sleeve is fixed to the front end of the cylinder base and is sleeved on the outside of the first piston body, and an inner limit flange is provided on the inner edge of the front port of the outer sleeve for contacting the outer limit flange, and the inner limit flange and the front end surface of the cylinder base respectively limit the forward and backward movement of the first piston body.

[0009] Furthermore, an annular limiting plate for limiting the second piston body is fixed to the front end surface of the first piston body.

[0010] Furthermore, a position sensor for contacting the second piston body is provided on the rear side surface of the annular limiting plate.

[0011] Furthermore, the release bearing is connected to the pressure plate of the clutch.

[0012] Compared with the prior art, the present invention has the following effects: the present invention has a reasonable design, and independent air cavities are formed between the first piston body and the cylinder body, and between the second piston body and the first piston body. By injecting compressed air into the air cavity to separate the clutch in steps, a larger separation force can be provided, which can achieve rapid separation and slow and smooth engagement, and is suitable for medium and large vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the main cross-sectional structure of an embodiment of the utility model;

[0014] Figure 2 yes Figure 1 The diagram of the structure is shown after omitting the clutch;

[0015] Figure 3 This is a schematic diagram of the first separation section in an embodiment of the present utility model;

[0016] Figure 4 This is a schematic diagram of the second separation section in an embodiment of the present utility model.

[0017] In the picture:

[0018] 1-annular limit plate; 2-release bearing; 3-position sensor; 4-outer sleeve; 5-second air vent; 6-first air vent; 7-cylinder base; 8-second piston body; 9-first piston body; 10-clutch; 101-flywheel disc; 102-friction disc; 103-pressure plate; 11-cylinder body; 12-first air cavity; 13-second air cavity; 14-first sealing ring; 15-second sealing ring; 16-outer limit flange; 17-inner limit flange; 18-shaft hole. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0020] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] like Figures 1 to 4 The utility model is a step-by-step clutch release mechanism, which is coaxially arranged with the clutch. The release mechanism includes a release bearing 2 that is matched with the pressure plate 103 of the clutch 10, and the release bearing is used to promote the separation and engagement of the clutch; it also includes a cylinder body 11, a first piston body 9 and a second piston body 8 that are coaxially arranged with the release bearing 2. The first piston body can reciprocate along the axial direction of the cylinder body, and the second piston body can reciprocate along the axial direction of the first piston body; the release bearing 2 is installed on the outer side of the front end of the second piston body 8; a first air cavity 12 is provided between the cylinder body 11 and the first piston body 9, and the first air cavity 12 is used to pass compressed air. Compressed air pushes the first piston body 9, the second piston body 8, and the release bearing 2 to simultaneously move axially toward the clutch. When these three bodies and the release bearing move simultaneously toward the clutch, the release bearing acts on the clutch, representing the first stage of clutch disengagement. A second air chamber 13 is provided between the first and second piston bodies 9, 8. This second air chamber 13 is used to admit compressed air and push the second piston body 8 and the release bearing 2 to simultaneously move axially toward the clutch. When these two bodies and the release bearing move simultaneously toward the clutch, the release bearing continues to act on the clutch, representing the second stage of clutch disengagement. The entire disengagement mechanism is pneumatically controlled, providing smooth control and a high degree of disengagement force, making it suitable for medium and large vehicles.

[0022] In this embodiment, the cylinder body 11 includes a cylinder base 7 with a stepped inner cavity. The inner cavity of the cylinder base 7 is continuous along its axial direction. The cylinder base 7 is coaxially sleeved on the outer side of the rear end of the first piston body 9. A first air cavity 12 is formed between the peripheral side of one end of the first piston body 9 extending into the interior of the cylinder base 7 and the stepped surface of the inner hole front end of the cylinder base 7. Figure 3 shown.

[0023] In this embodiment, the inner cavity of the first piston body 9 is a stepped hole and is axially continuous. The first piston body 9 is coaxially sleeved on the outer side of the second piston body 8. A second air cavity 13 is formed between the peripheral side of the second piston body 8 and the stepped surface of the front end of the inner hole of the first piston body 9. Figure 4 shown.

[0024] In this embodiment, the cylinder base, the first piston body and the second piston body are all rotary body structures, and their outer shapes are in the shape of a stepped shaft.

[0025] In this embodiment, a first air vent 6 is provided on the side of the cylinder base 7 to facilitate the entry and exit of compressed gas. The first air vent 6 is connected to the first air cavity 12, and compressed gas is introduced into the first air cavity through the first air vent.

[0026] In this embodiment, a second air vent 5 is provided on the side of the first piston body 9 to facilitate the entry and exit of compressed gas. The second air vent 5 is connected to the second air cavity 13, and compressed gas is introduced into the second air cavity through the second air vent.

[0027] In this embodiment, a pair of first sealing rings 14 are provided between the peripheral side of the first piston body 9 and the inner cavity wall of the cylinder base 7. The pair of first sealing rings 14 are distributed along the axial direction of the first piston body 9. The pair of first sealing rings 14 are respectively located at the front and rear ends of the first air cavity 12 so as to seal the first air cavity from the front and rear ends.

[0028] In this embodiment, a pair of second sealing rings 15 are provided between the peripheral side of the second piston body 8 and the inner cavity wall of the first piston body 9. The pair of second sealing rings 15 are distributed along the axial direction of the second piston body 8. The pair of second sealing rings 15 are respectively located at the front and rear ends of the second air cavity 13 so as to seal the second air cavity from the front and rear ends.

[0029] In this embodiment, a ring-shaped outer limit flange 16 is provided on the peripheral side of the first piston body 9; an outer sleeve 4 is fixedly sleeved on the outer side of the front end of the cylinder base 7, and the outer sleeve 4 is sleeved on the outer side of the first piston body 9. The inner edge of the front port of the outer sleeve 4 is provided with a ring-shaped inner limit flange 17, and the inner limit flange 17 is used to contact the outer limit flange 16 to limit the forward movement of the first piston body 9. The inner limit flange 17 and the front end surface of the cylinder base 7 limit the forward and backward movements of the first piston body 9 respectively.

[0030] In this embodiment, an annular limiting plate 1 is fixed to the front end surface of the first piston body 9 , and the inner end of the annular limiting plate 1 extends to the inner side of the first piston body 9 . The annular limiting plate 1 is used to limit the forward movement of the second piston body 8 .

[0031] In this embodiment, a position sensor 3 is provided on the rear side of the annular stop plate 1 for contact with the second piston. This position sensor is connected to the clutch control system. When the second piston contacts the position sensor, it indicates that the clutch is disengaged, and the control system then responds and performs subsequent operations.

[0032] In this embodiment, the release bearing is connected to the pressure plate of the clutch.

[0033] In this embodiment, the cylinder base, the first piston and the second piston can all adopt a split structure design, which can reduce the difficulty of processing the separation mechanism.

[0034] In this embodiment, when in use, the separation mechanism is installed on the output shaft connected to the clutch, and the middle part of the second piston body is axially provided with an axial hole for matching with the output shaft.

[0035] Specific implementation process: When the clutch needs to be disengaged, the first vent 6 is ventilated first, and compressed gas is introduced into the first air chamber 12 through the first vent 6. The compressed gas in the first air chamber 12 pushes the first piston body 8, the second piston body 9 and the release bearing 2 to move forward axially for a fixed distance at the same time. After the release bearing 2 moves, it acts on the clutch pressure plate 103 to complete the first stage of clutch disengagement. Figure 3 As shown; after reaching the position, the second air vent 5 is ventilated, and compressed gas is introduced into the second air chamber 13 through the second air vent 5. The compressed gas in the second air chamber 13 pushes the second piston body 8 and the release bearing 2 to move forward axially at the same time. After the release bearing 2 moves, it acts on the pressure plate 103 of the clutch to perform the second separation action; when the second piston body touches the position sensor 3, the second stage of clutch separation is completed, indicating that the clutch is in a disconnected state, and the system will respond immediately and perform subsequent operations.

[0036] The advantages of the present invention are:

[0037] (1) The release mechanism is coaxially arranged with the clutch, and the cylinder base and the two-part piston body are designed with a split structure. While ensuring the dual-piston structure design, it reduces the processing difficulty of the release mechanism and has a compact structure.

[0038] (2) Air pressure control: an independent air cavity is formed between the two piston bodies and the cylinder body. By injecting compressed air into the air cavity to separate the clutch in steps, a larger separation force can be provided, which is suitable for medium and large vehicles;

[0039] (3) Step-by-step control, the separation mechanism can achieve rapid separation and slow and smooth engagement, and the mechanism operation has good stability.

[0040] If the present invention discloses or involves components or structural parts that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connection using bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by integral molding using a casting process) (except where it is obviously impossible to use an integrated molding process).

[0041] In addition, unless otherwise stated, the terms used in any technical solution disclosed in the above-mentioned utility model to express positional relationships or shapes include states or shapes that are approximate, similar or close thereto.

[0042] Any component provided by the present invention can be assembled from multiple separate components, or can be a separate component manufactured by an integral forming process.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and not to limit it; although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents; without departing from the spirit of the technical solution of the utility model, they should all be included in the scope of the technical solution for protection of the utility model.

Claims

1. A step-by-step clutch release mechanism, comprising a release bearing engaged with a clutch, characterized in that: It also includes a cylinder body, a first piston body and a second piston body coaxially arranged with the release bearing, and the release bearing is installed at the front end of the second piston body; a first air cavity is provided between the cylinder body and the first piston body, and the first air cavity is used to allow compressed air to pass through and push the first piston body, the second piston body and the release bearing to move axially toward the clutch at the same time through the compressed air; a second air cavity is provided between the first piston body and the second piston body, and the second air cavity is used to allow compressed air to pass through and push the second piston body and the release bearing to move axially toward the clutch through the compressed air.

2. A step-by-step clutch release mechanism according to claim 1, characterized in that: The cylinder body includes a cylinder base coaxially sleeved on the outside of the rear end of the first piston body, and a first air cavity is formed between the peripheral side of one end of the first piston body extending into the interior of the cylinder base and the cylinder base; the first piston body is coaxially sleeved on the outside of the second piston body, and a second air cavity is formed between the peripheral side of the second piston body and the first piston body.

3. The step-by-step clutch release mechanism according to claim 2, characterized in that: The side of the cylinder base is provided with a first air vent to facilitate the entry and exit of compressed gas, and the first air vent is connected to the first air cavity; the side of the first piston body is provided with a second air vent to facilitate the entry and exit of compressed gas, and the second air vent is connected to the second air cavity.

4. The step-by-step clutch release mechanism according to claim 2, characterized in that: A pair of first sealing rings are arranged between the circumferential side of the first piston body and the cylinder base, the pair of first sealing rings are distributed along the axial direction of the first piston body, and the pair of first sealing rings are respectively located at the front and rear ends of the first air cavity; a pair of second sealing rings are arranged between the circumferential side of the second piston body and the first piston body, the pair of second sealing rings are distributed along the axial direction of the second piston body, and the pair of second sealing rings are respectively located at the front and rear ends of the second air cavity.

5. The step-by-step clutch release mechanism according to claim 2, characterized in that: An outer limit flange is provided on the peripheral side of the first piston body; an outer sleeve is fixed to the front end of the cylinder base and is sleeved on the outside of the first piston body, and an inner limit flange is provided on the inner edge of the front port of the outer sleeve for contacting the outer limit flange, and the inner limit flange and the front end surface of the cylinder base respectively limit the forward and backward movement of the first piston body.

6. The step-by-step clutch release mechanism according to claim 2, characterized in that: An annular limiting plate for limiting the second piston body is fixed to the front end surface of the first piston body.

7. The step-by-step clutch release mechanism according to claim 6, characterized in that: A position sensor for contacting the second piston body is provided on the rear side surface of the annular limiting plate.

8. The step-by-step clutch release mechanism according to claim 1, characterized in that: The release bearing is connected to the pressure plate of the clutch.

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