A multiple clutch protection device

Abstract

The application discloses a multiple clutch protection device, comprising a clutch assembly, a temperature monitoring unit, a positive pressure relief unit and a mechanical emergency transmission assembly; the clutch assembly is arranged between an input shaft and an output shaft; the temperature monitoring unit is installed on a shell of the clutch; the positive pressure relief unit is arranged at the end of a first pressure oil channel leading to a clutch piston; and the mechanical emergency transmission assembly is arranged on a transmission path between the input shaft and the output shaft. The application improves the safety of the clutch by monitoring the oil temperature in real time. The positive pressure relief of the over-temperature frit enables the active separation of the clutch, avoiding the burnout failure of the clutch. The setting of the mechanical emergency transmission assembly ensures the uninterrupted power supply through the double transmission redundancy. The application has high structural integration, and can be adapted and modified without greatly changing the existing transmission and clutch body, and has strong universality.

Description

Technical Field

[0001] This invention belongs to the field of clutch technology, and in particular relates to a multi-clutch protection device. Background Technology

[0002] Hydraulic clutches are currently widely used in various machines, relying on oil circuits to control clutch engagement and disengagement. Existing structures mostly adopt conventional pressure feedback and suggested heat dissipation layouts. They rely on lubrication and cooling oil circuits and pressure regulation to adapt to operating conditions, lacking targeted high-temperature monitoring and active protection, and failing to meet the basic requirements of clutch transmission under normal stable operating conditions.

[0003] Existing clutches lack active high-temperature protection, making them prone to burning and failure. Under conditions of frequent slippage and engagement, high temperatures easily accumulate, and the temperature rise trend cannot be predicted in advance. Overheating causes friction plate burning and steel plate deformation, easily leading to transmission failure. Furthermore, the lack of redundancy design means that the clutch completely interrupts power upon failure, easily causing accidents and resulting in difficult and costly repairs. Moreover, clutch burning leads to overall machine contamination, resulting in high operating and maintenance costs and a short service life. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a multi-clutch protection device.

[0005] The present invention is achieved through the following technical solutions.

[0006] The present invention provides a multi-clutch protection device, comprising a clutch assembly, a temperature monitoring unit, an active pressure relief unit, and a mechanical emergency transmission assembly; The clutch assembly is disposed between the input shaft and the output shaft; The temperature monitoring unit is mounted on the clutch housing; The active pressure relief unit is located at the end of the first pressure oil passage leading to the clutch piston; The mechanical emergency transmission assembly is located on the transmission path between the input shaft and the output shaft.

[0007] Preferably, the clutch assembly includes a gear ring, a friction plate assembly, and a clutch piston; The gear ring is connected to the input shaft; The friction plate assembly is located on the side of the clutch piston away from the gear ring; The clutch piston is slidably disposed in the hydraulic cylinder at the end of the first pressure oil passage on one side of the gear ring.

[0008] Preferably, the friction plate assembly includes an outer friction plate connected to the gear ring and an inner friction plate connected to the output shaft.

[0009] Preferably, external splines are provided on the gear ring and the output shaft, and the gear ring and the output shaft are connected to the mechanical emergency transmission assembly through the external splines.

[0010] Preferably, the mechanical emergency transmission assembly includes a shift sleeve and a shift lever for operating the shift sleeve, wherein the shift sleeve is axially slidable on one side of the gear ring.

[0011] Preferably, the shift sleeve is provided with internal splines; In the initial position, the shift sleeve is disconnected from the transmission path and is not connected to the output shaft. In the emergency position, operating the shift lever can move the shift sleeve axially, causing the internal spline of the shift sleeve to mesh with the gear ring and the external spline on the output shaft simultaneously, thereby directly transmitting the power from the input shaft to the output shaft.

[0012] Preferably, the shift lever and the shift sleeve are fixed by a retaining ring, and the shift lever is slidably mounted on the clutch housing.

[0013] Preferably, the temperature monitoring unit includes a temperature sensor.

[0014] Preferably, the active pressure relief unit is a frit-type pressure relief valve, which includes a frit embedded in the end of the second pressure oil passage on the clutch piston.

[0015] Preferably, a first bearing and a second bearing are provided between the input shaft and the output shaft.

[0016] The beneficial effects of this invention are as follows: The present invention adds temperature monitoring of the friction plates to the clutch. The clutch temperature rise is monitored by a sensor. If the clutch temperature rises abnormally, the machine can be stopped in time to protect the clutch and troubleshoot system faults.

[0017] This invention introduces a molten block into the clutch pressure oil passage. The molten block is made of a temperature-sensitive material, and its melting point is set below the friction plate ablation temperature but above the normal operating temperature of the friction plate. When the clutch temperature is too high, the molten block melts directly, releasing the clutch pressure oil, causing the clutch to disengage, protecting the clutch friction plate from ablation, and facilitating subsequent troubleshooting of system faults.

[0018] This invention incorporates a redundant design by adding a manual shifting mechanical emergency transmission component outside the clutch. When a high temperature alarm or high temperature fuse fails, the mechanical emergency transmission component is activated to prevent transmission failure in emergency situations, ensuring power output and reducing downtime losses.

[0019] This invention can reduce the probability of clutch burning, prevent foreign matter from burning and contaminating the entire equipment interior, reduce equipment operation and maintenance costs, and extend the service life of the clutch. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention; In the diagram: 1-Input shaft, 2-Gear ring, 3-Fuse, 4-Clutch piston, 41-Second pressure oil passage, 5-Housing, 6-Temperature sensor, 7-Shift gear sleeve, 8-Shift lever, 9-Friction plate assembly, 10-Output shaft, 11-First pressure oil passage, 12-Hydraulic cylinder, 13-First bearing, 14-Second bearing, A-Pressure oil flow direction. Detailed Implementation

[0021] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0022] Example: like Figure 1 As shown, a multi-clutch protection device includes a clutch assembly, a temperature monitoring unit, an active pressure relief unit, and a mechanical emergency transmission assembly. The clutch assembly is located between the input shaft 1 and the output shaft 10, and is used to realize power transmission or interruption under the action of pressurized oil; The temperature monitoring unit is installed on the clutch housing 5 and is used to monitor the clutch operating temperature in real time. The active pressure relief unit is located at the end of the first pressure oil passage 11 leading to the clutch piston 4. When the temperature monitoring unit detects that the operating temperature exceeds a first safety threshold, it automatically releases the oil pressure in the first pressure oil passage 11, causing the clutch to disengage and the pressure oil to flow to A. Figure 1 As shown; The mechanical emergency transmission assembly is installed on the transmission path between the input shaft 1 and the output shaft 10, and is used to establish a direct mechanical transmission path that bypasses the clutch assembly when the clutch assembly fails due to a malfunction.

[0023] The clutch assembly includes a gear ring 2, a friction plate assembly 9, and a clutch piston 4; The gear ring 2 is connected to the input shaft 1 via a spline; The friction plate assembly 9 is located on the side of the clutch piston 4 away from the gear ring 2; The clutch piston 4 is slidably disposed in the hydraulic cylinder 12 at the end of the first pressure oil passage 11 on one side of the gear ring 2, and presses or releases the friction plate assembly 9 under the drive of pressure oil.

[0024] The friction plate assembly 9 includes an outer friction plate connected to the gear ring 2 and an inner friction plate connected to the output shaft 10.

[0025] External splines are provided on the gear ring 2 and the output shaft 10 respectively, and the gear ring 2 and the output shaft 10 are connected to the mechanical emergency transmission assembly through the external splines.

[0026] The mechanical emergency transmission assembly includes a shift sleeve 7 and a shift lever 8 for operating the shift sleeve 7. The shift sleeve 7 is axially slidable on one side of the gear ring 2.

[0027] The shift sleeve 7 is provided with an internal spline; In the initial position, the shift sleeve 7 is disconnected from the transmission path and is not connected to the output shaft 10. In the emergency position, operating the shift lever 8 can move the shift sleeve 7 axially, so that the internal spline of the shift sleeve 7 simultaneously meshes with the external spline on the gear ring 2 and the output shaft 10, thereby directly transmitting the power of the input shaft 1 to the output shaft 10 and avoiding power interruption.

[0028] The shift lever 8 and the shift sleeve 7 are fixed by a retaining ring, and the shift lever 8 is slidably mounted on the clutch housing 5.

[0029] The temperature monitoring unit includes a temperature sensor 6, which is used to monitor the temperature of the lubricating oil ejected from the clutch ring gear 2.

[0030] The active pressure relief unit is a frit-type pressure relief valve, which includes a frit 3 made of a temperature-sensitive material, the frit 3 being embedded at the end of the second pressure oil passage 41 on the clutch piston 4.

[0031] The melting point of the molten metal 3 is set to be higher than the normal operating temperature of the clutch but lower than the ablation temperature of the clutch friction plates. When the clutch operating temperature reaches or exceeds the melting point of the molten metal 3, the molten metal 3 melts and forms a pressure relief channel, allowing the pressure oil behind the clutch piston 4 to be released from the end of the second pressure oil passage 41, thereby disengaging the clutch and preventing clutch ablation. The molten metal 3 can be selected from Wood's alloy, bismuth-tin alloy, and zinc-aluminum low-melting-point alloy with a melting point below 400℃, depending on the actual situation.

[0032] A first bearing 13 and a second bearing 14 are provided between the input shaft 1 and the output shaft 10 to facilitate the rotation of the input shaft 1 and the output shaft 10.

[0033] This invention is applicable to systems such as heavy-duty trucks, buses, and construction machinery that use wet clutch transmission systems, achieving the effects of clutch anti-burning and uninterrupted power.

Claims

1. A multi-clutch protection device, characterized in that: Includes clutch assembly, temperature monitoring unit, active pressure relief unit, and mechanical emergency transmission assembly; The clutch assembly is disposed between the input shaft (1) and the output shaft (10); The temperature monitoring unit is installed on the clutch housing (5); The active pressure relief unit is located at the end of the first pressure oil passage (11) leading to the clutch piston (4); The mechanical emergency transmission assembly is located on the transmission path between the input shaft (1) and the output shaft (10).

2. The multi-clutch protection device as described in claim 1, characterized in that: The clutch assembly includes a gear ring (2), a friction plate assembly (9), and a clutch piston (4). The gear ring (2) is connected to the input shaft (1); The friction plate assembly (9) is located on the side of the clutch piston (4) away from the gear ring (2); The clutch piston (4) is slidably disposed in the hydraulic cylinder (12) at the end of the first pressure oil passage (11) on one side of the gear ring (2).

3. The multi-clutch protection device as described in claim 2, characterized in that: The friction plate assembly (9) includes an outer friction plate connected to the gear ring (2) and an inner friction plate connected to the output shaft (10).

4. A multi-clutch protection device as described in claim 3, characterized in that: External splines are provided on the gear ring (2) and the output shaft (10), and the gear ring (2) and the output shaft (10) are connected to the mechanical emergency transmission assembly through the external splines.

5. A multi-clutch protection device as described in claim 4, characterized in that: The mechanical emergency transmission assembly includes a shift sleeve (7) and a shift lever (8) for operating the shift sleeve (7); the shift sleeve (7) is axially slidably disposed on one side of the gear ring (2).

6. A multi-clutch protection device as described in claim 5, characterized in that: The shift sleeve (7) is provided with an internal spline; In the initial position, the shift sleeve (7) is disconnected from the transmission path and is not connected to the output shaft (10). In the emergency position, operating the shift lever (8) can cause the shift sleeve (7) to move axially, so that the internal spline of the shift sleeve (7) simultaneously meshes with the gear ring (2) and the external spline on the output shaft (10), thereby directly transmitting the power of the input shaft (1) to the output shaft (10).

7. A multi-clutch protection device as described in claim 6, characterized in that: The shift lever (8) is fixed to the shift sleeve (7) by a retaining ring, and the shift lever (8) is slidably mounted on the clutch housing (5).

8. A multi-clutch protection device as described in claim 1, characterized in that: The temperature monitoring unit includes a temperature sensor (6).

9. A multi-clutch protection device as described in claim 1, characterized in that: The active pressure relief unit is a frit-type pressure relief valve, including a frit (3), which is embedded at the end of the second pressure oil passage (41) on the clutch piston (4).

10. A multi-clutch protection device as described in claim 1, characterized in that: A first bearing (13) and a second bearing (14) are provided between the input shaft (1) and the output shaft (10).

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