Hydraulic release bearing limiting device

Abstract

The utility model relates to a bearing limiting device, in particular to a hydraulic release bearing limiting device, which aims to solve the problems of poor adaptability and insufficient structural stability of the existing release bearing supporting sleeve, and comprises an off-shell positioning structure assembly, a release bearing supporting sleeve, N elastic telescopic components and an adjusting sleeve, and N is greater than or equal to 2; the off-shell positioning structure assembly comprises a cylindrical centering sleeve and a positioning structure; one end of the centering sleeve is an open end, and the other end is provided with a bottom plate which is provided with a first through hole along the central axis; the release bearing supporting sleeve is coaxially arranged in the centering sleeve in a sleeved mode and can axially move in the first through hole. A limiting step is arranged on the outer wall of the release bearing supporting sleeve; the N elastic telescopic assemblies are arranged between the limiting steps and the bottom plate. The adjusting sleeve is sleeved outside the release bearing supporting sleeve, and two ends of the adjusting sleeve abut against the first limiting boss and the limiting step respectively.

Description

Technical Field

[0001] The utility model relates to a bearing limiting device, in particular to a hydraulic separation bearing limiting device. Background Art

[0002] When filling the automatic transmission actuator with working fluid, the hydraulic release bearing is located at various distances from the clutch housing stop. This ensures that the hydraulic release bearing is in its initial installation position during filling, and that the hydraulic release bearing's limit position does not exceed its maximum allowable displacement during the filling process. Currently, the common method is to install the corresponding clutch and clamp it to a test bench to achieve the hydraulic release bearing's limit position. However, due to the large size and weight of the test bench tooling and clutch, tooling replacement is difficult, production changeover efficiency is low, limit accuracy is low, transmission clamping is difficult, and online production of the hydraulic release bearing is impossible.

[0003] The Chinese patent with publication number CN202674092U discloses an automobile hydraulic clutch release bearing assembly, which includes a release bearing unit and a hydraulic moving unit. A spring washer is provided in the release bearing unit, and the spring washer provides axial pre-compression force, so that the release bearing unit has an automatic centering function, which is conducive to improving the installation accuracy of the release bearing, but its position during the installation process is still difficult to control. The Chinese patent with publication number CN216343539U discloses a release bearing support sleeve, which guides and supports the axial movement of the hydraulic release bearing by providing a sleeve between the hydraulic release bearing and the transmission input shaft. The end of the sleeve is connected to the transmission front housing through a connecting part to further achieve axial positioning of the hydraulic release bearing. However, it is mainly used during normal driving of the vehicle and can only be used for guiding and supporting the axial movement of the hydraulic release bearing. It has poor adaptability to hydraulic release bearings of different sizes and cannot achieve overload protection, resulting in insufficient structural stability. Utility Model Content

[0004] The purpose of the utility model is to solve the problems of poor adaptability and insufficient structural stability of the existing release bearing support sleeve, and to provide a hydraulic release bearing limiting device.

[0005] To achieve the above objectives, the technical solutions provided by this utility model are as follows:

[0006] A hydraulic release bearing limit device is special in that it includes a housing-separating positioning structure assembly, a release bearing support sleeve, N elastic telescopic components and an adjustment sleeve, wherein N ≥ 2; the housing-separating positioning structure assembly includes a cylindrical centering sleeve and a positioning structure; one end of the centering sleeve is open, and the other end is provided with a base plate, and the base plate has a first through hole along the central axis; the positioning structure is provided on the outer wall of the centering sleeve for connecting and positioning with the clutch housing; the release bearing support sleeve is coaxially sleeved in the centering sleeve, and one end of the release bearing support sleeve extends out of the open end of the centering sleeve. A first limiting boss is provided on the outer wall near the end around its circumference, and the other end of the release bearing support sleeve extends out of the first through hole, and an annular gap is provided between the other end of the release bearing support sleeve and the inner wall of the first through hole, so that the release bearing support sleeve can move axially in the first through hole; the release bearing support sleeve is provided with a second through hole along its central axis; a limiting step is provided on the middle part of the outer wall of the release bearing support sleeve around its circumference, and the limiting step is located in the centering sleeve; N elastic telescopic components are respectively arranged between the limiting step and the bottom plate, and the total preload F0 of the N elastic telescopic components satisfies the following relationship:

[0007] F1≤F0<F2

[0008] Wherein, F1 is the installation force of the hydraulic release bearing to be limited, and F2 is the maximum working pressure of the hydraulic release bearing to be limited;

[0009] The adjusting sleeve is arranged outside the release bearing support sleeve, and its two ends are respectively against the first limiting boss and the limiting step.

[0010] Furthermore, the total preload force F0 satisfies the following relationship:

[0011] 1.1F1≤F0≤1.5F1<F2.

[0012] Furthermore, the elastic telescopic assembly includes a guide fixing member, a guide rod and a spring;

[0013] The guide fixing members of the N elastic telescopic components are of an integrated structure to form a guide ring;

[0014] The guide ring is arranged outside the adjustment sleeve and connected to the open end of the centering sleeve;

[0015] One end of the guide rod is passed through the bottom plate, and the other end passes through the limiting step and is connected to the guide ring;

[0016] The spring is sleeved on the guide rod, and two ends of the spring are respectively against the bottom plate and the limiting step.

[0017] Furthermore, a second limiting boss is provided at one end of the guide rod for abutting against a side of the base plate away from the spring, and a threaded structure is provided at the other end for threaded connection with the guide fixing piece.

[0018] Furthermore, the guide ring is connected to the open end of the centering sleeve via a positioning pin.

[0019] Furthermore, the positioning structure includes at least three positioning connecting rods arranged along the circumference of the centering sleeve, one end of the positioning connecting rod is connected to the centering sleeve, and a third through hole is provided at the other end. An anti-rotation bolt is provided in the third through hole, and a hexagonal nut is mounted on the anti-rotation bolt for connecting to the positioning hole on the external clutch.

[0020] Furthermore, it also includes a spring compression sleeve sleeved between the release bearing support sleeve and the limiting step;

[0021] The two ends of the adjustment sleeve close to the release bearing support sleeve abut between the first limiting boss and the spring compression sleeve, and the two ends of the other part abut between the first limiting boss and the limiting step; the limiting step includes a first step and a second step arranged continuously, and the circumferential side wall of the first step contacts the side surface of the spring;

[0022] The end of the spring abuts against the step surface of the second step.

[0023] Furthermore, the spring compression sleeve, the release bearing support sleeve and the adjustment sleeve are connected by bolts.

[0024] Beneficial effects of the utility model:

[0025] 1. The utility model limits the position of the hydraulic release bearing by setting a shell-separated positioning structure assembly, a release bearing support sleeve and an elastic telescopic component, thereby solving the problems of low limiting accuracy of the hydraulic release bearing position when filling with working fluid, difficulty in tooling replacement, low production efficiency, and inability to achieve online production of the hydraulic release bearing. It meets the filling requirements while preventing the hydraulic release bearing from falling out and failing.

[0026] 2. The utility model is provided with an adjustment sleeve, and by adjusting its axial size, it can meet the requirements of transmission filling working fluid with different specifications of the hydraulic release bearing to the end face of the clutch housing stop, thereby realizing a flexible design. When in use, the hydraulic release bearing limit device of the utility model is installed on the clutch housing, so that the hydraulic release bearing can be limited between the initial installation position and the maximum separation position, which is easy to disassemble and assemble, and the replacement efficiency is improved.

[0027] 3. The utility model adopts a lightweight design with a small size, a short dimension chain, high limit accuracy and is easy to maintain. Compared with the original solution of using a clutch and a positioning test disc to be installed on an off-line test bench, the utility model can realize online installation, avoids the transportation of the transmission inside and outside the line, and shortens the production cycle.

[0028] 4. The utility model provides elastic limiting by arranging springs, guide rods, bottom plates and limiting steps, which can prevent the actuator motor from stalling and overloading during filling. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic cross-sectional view of an embodiment of the present invention;

[0030] Figure 2 This is a structural diagram of the housing-separated positioning structure assembly in an embodiment of the present utility model;

[0031] Figure 3 It is a three-dimensional structural schematic diagram of an embodiment of the utility model;

[0032] Figure 4 This is a schematic structural diagram of an embodiment of the present utility model in an installed state;

[0033] Figure 5 This is a schematic cross-sectional view of the embodiment of the present invention in an installed state;

[0034] Figure 6 It is a schematic diagram of the spring deformation in the embodiment of the present utility model.

[0035] Description of reference numerals:

[0036] 1-shell positioning structure assembly, 11-centering sleeve, 12-positioning structure, 2-guide rod, 3-spring pressure sleeve, 31-limiting step, 32-first step, 33-second step, 4-release bearing support sleeve, 41-hydraulic release bearing, 5-adjusting sleeve, 6-guide fixing part, 7-anti-rotation bolt, 8-locating pin, 9-spring, 10-hexagonal nut. DETAILED DESCRIPTION

[0037] The structure of the hydraulic separation bearing limiting device of the utility model is as follows Figure 1 As shown, it includes a housing-separated positioning structure assembly 1, a release bearing support sleeve 4, N elastic telescopic components and an adjustment sleeve 5, where N≥2. In this embodiment, N=4.

[0038] The housing positioning structure assembly 1 includes a cylindrical centering sleeve 11 and a positioning structure 12, such as Figure 2 As shown, in this embodiment, three positioning structures 12 are provided; one end of the centering sleeve 11 is an open end, and the other end is provided with a base plate, and the base plate has a first through hole along the center axis; the positioning structure 12 includes at least three positioning connecting rods arranged along the circumference of the centering sleeve 11, and one end of the positioning connecting rod is connected to the centering sleeve 11. Welding is adopted in this embodiment. In order to ensure the accuracy of center positioning and axial limit, the dimensions related to the fit are all processed after welding.

[0039] The release bearing support sleeve 4 is coaxially sleeved in the centering sleeve 11, and one end of the release bearing support sleeve 4 extends out of the open end of the centering sleeve 11, and a first limiting boss is arranged around its circumference on the outer wall near the end, and the other end of the release bearing support sleeve 4 extends out of the first through hole, and an annular gap is provided between the inner wall of the first through hole, so that the release bearing support sleeve 4 can move axially in the first through hole; the release bearing support sleeve 4 is provided with a second through hole along its center axis, and the second through hole is a stepped hole, and the large diameter end corresponds to the first limiting boss. Considering that the weight of the hydraulic release bearing limit device cannot be too large, the structural size is minimized as much as possible. The structural design here is relatively compact, resulting in the size of the release bearing support sleeve 4 being relatively close to the size of the hydraulic release bearing 41. Therefore, a stepped hole is provided to avoid interference with the structure of the front end of the hydraulic release bearing 41. If the overall size of the hydraulic release bearing limit device is appropriately increased, the size of the first through hole is large enough, and the stepped hole may not be provided. A spring compression sleeve 3 is sleeved on the middle part of the outer wall of the release bearing support sleeve 4, and a limiting step 31 is circumferentially provided on the outer wall of the spring compression sleeve 3. The adjustment sleeve 5 is sleeved on the outside of the release bearing support sleeve 4, and the two ends of the adjustment sleeve 5 close to the release bearing support sleeve 4 are respectively against the first limiting boss and the spring compression sleeve 3, and the two ends of the other part are respectively against the first limiting boss and the limiting step 31; the adjustment sleeve 5 has a variety of specifications, corresponding to transmissions of different sizes, and is easy to replace, so as to adapt to different distances from the hydraulic release bearing 41 to the clutch stop of the transmission.

[0040] The limiting step 31 includes a first step 32 and a second step 33 that are arranged continuously. The elastic telescopic assembly includes a guide fixing member 6, a guide rod 2, and a spring 9. For easy installation, the guide fixing members 6 of the four elastic telescopic assemblies are an integrated structure, forming a guide ring. The guide ring is mounted outside the adjustment sleeve 5 and is connected to the open end of the centering sleeve 11 via a positioning pin. One end of the guide rod 2 is inserted into the base plate, and a second limiting boss is provided at the end. The second limiting boss rests on the side of the base plate away from the guide ring. The other end is provided with a threaded structure that passes through the second step 33 and is threadedly connected to the guide ring. The spring 9 is mounted on the guide rod 2, and its two ends respectively abut against the step surfaces of the base plate and the second step 33. The side wall of the first step 32 contacts the outer side of the spring 9, limiting its outer side and improving the stability of the second step. The guide rod 2 provides guidance for the second step 33 and the spring 9 to prevent them from tilting. The spring 9 needs to be pre-stressed during installation. The total pre-stress of the spring 9 is slightly greater than the installation force of the hydraulic release bearing 41, so as to limit the hydraulic release bearing 41 to the initial installation position. The total pre-stress F0 of the four springs 9 has a value range of F1≤F0<F2, which can achieve the limitation of the hydraulic release bearing 41, wherein F1 is the installation force of the hydraulic release bearing 41 to be limited, and F2 is the maximum working pressure of the hydraulic release bearing 41 to be limited. However, if the pre-stress of the spring 9 is too large, the length of the spring 9 will be too long, which will increase the axial dimension of the hydraulic release bearing limiting device. If the pre-stress of the spring 9 is too small, the pre-stress will be insufficient to overcome the installation force, and the hydraulic release bearing 41 cannot be limited to the initial installation position. Therefore, in actual work, the value range of the total pre-stress F0 is preferably: 1.1F1≤F0≤1.5F1<F2.

[0041] Pin holes are provided correspondingly on one end of the guide fixing member 6 and the centering sleeve 11 , wherein a positioning pin 8 is provided to achieve a fixed connection, thereby preventing the guide rod 2 from failing to guide due to the rotation of the guide fixing member 6 .

[0042] In order to improve the stability of the hydraulic release bearing limit device and facilitate disassembly and installation, the spring pressure sleeve 3, the release bearing support sleeve 4 and the adjustment sleeve 5 are connected and compressed by bolts to jointly bear the thrust from the hydraulic release bearing 41.

[0043] like Figures 2 to 4 As shown, a third through hole is provided at the other end of the positioning connecting rod, corresponding to the positioning hole on the clutch housing of the transmission. An anti-rotation bolt 7 is provided in the corresponding third through hole and positioning hole. A hexagonal nut 10 is fitted over the anti-rotation bolt 7 to secure it, thereby achieving the connection and positioning between the hydraulic release bearing limiter and the clutch housing of the transmission. The specific use process of this utility model is as follows:

[0044] 1. Install the limit device: such as Figure 4 、 Figure 5As shown, first select the appropriate adjustment sleeve 5 according to the size of the transmission, install the adjustment sleeve 5 between the release bearing support sleeve 4 and the spring pressure sleeve 3, align the three claws of the limit tool with the clutch housing stop of the transmission, and apply axial force at the same time to push the hydraulic release bearing 41 to the initial installation position. During this process, the installation force of the hydraulic release bearing 41 is less than the preload of the spring 9, as shown in FIG. Figure 6 As shown, the spring 9 is located at its initial installation position after pre-compression. The spring 9 will not be further deformed during the installation process. The installation is completed by fixing the limit device to the clutch housing of the transmission through the hexagonal nut 10.

[0045] 2. Filling the working fluid: After installing the limit device, fill the working fluid. When filling, the hydraulic release bearing 41 will reciprocate. During this process, the spring 9 Figure 6 The spring 9 works in the working deformation zone shown. When the pressure is too high, the spring 9 works in the overload deformation zone. This process is still elastic deformation, so it can provide a buffer before the motor protection program is started to avoid motor stall damage.

[0046] 3. After filling, remove the limit device.

[0047] The above description is only a specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present invention, and these modifications or replacements should be included in the protection scope of the present invention.

Claims

1. A hydraulic release bearing limit device, characterized by: It comprises a housing-separated positioning structure assembly (1), a separation bearing support sleeve (4), N elastic telescopic components and an adjustment sleeve (5), wherein N is greater than or equal to 2; The housing-separated positioning structure assembly (1) comprises a cylindrical centering sleeve (11) and a positioning structure (12); One end of the centering sleeve (11) is an open end, and the other end is provided with a bottom plate, and the bottom plate is provided with a first through hole along the central axis; the positioning structure (12) is provided on the outer wall of the centering sleeve (11) and is used for connecting and positioning with the clutch housing; The separation bearing support sleeve (4) is coaxially sleeved in the centering sleeve (11), one end of the separation bearing support sleeve (4) extends out of the open end of the centering sleeve (11), and a first limiting boss is provided on the outer wall near the end around its circumference, and the other end of the separation bearing support sleeve (4) extends out of the first through hole, and an annular gap is provided between the separation bearing support sleeve (4) and the inner wall of the first through hole, so that the separation bearing support sleeve (4) can move axially in the first through hole; the separation bearing support sleeve (4) is provided with a second through hole along its central axis; a limiting step (31) is provided on the middle part of the outer wall of the separation bearing support sleeve (4) around its circumference, and the limiting step (31) is located in the centering sleeve (11); N elastic telescopic components are respectively arranged between the limiting step (31) and the bottom plate, and the total preload F0 of the N elastic telescopic components satisfies the following relationship: F1≤F0<F2 Wherein, F1 is the installation force of the hydraulic release bearing (41) to be limited, and F2 is the maximum working pressure of the hydraulic release bearing (41) to be limited; The adjustment sleeve (5) is sleeved outside the release bearing support sleeve (4), and its two ends respectively abut against the first limiting boss and the limiting step (31).

2. The hydraulic release bearing limiting device according to claim 1, characterized in that: The total preload force F0 satisfies the following relationship: 1.1F1≤F0≤1.5F1<F2.

3. The hydraulic release bearing limiting device according to claim 2, characterized in that: The elastic telescopic assembly comprises a guide fixing member (6), a guide rod (2) and a spring (9); The guide fixing members (6) of the N elastic telescopic components are of an integrated structure, forming a guide ring; The guide ring is arranged outside the adjustment sleeve (5) and connected to the open end of the centering sleeve (11); One end of the guide rod (2) is passed through the bottom plate, and the other end passes through the limiting step (31) and is connected to the guide ring; The spring (9) is sleeved on the guide rod (2), and its two ends respectively abut against the bottom plate and the limiting step (31).

4. The hydraulic release bearing limiting device according to claim 3, characterized in that: A second limiting boss is provided at one end of the guide rod (2) for abutting against the side of the bottom plate away from the spring (9), and a threaded structure is provided at the other end for threaded connection with the guide fixing member (6).

5. A hydraulic release bearing limiting device according to claim 3 or 4, characterized in that: The guide ring is connected to the open end of the centering sleeve (11) via a positioning pin (8).

6. The hydraulic release bearing limiting device according to claim 1, characterized in that: The positioning structure (12) includes at least three positioning connecting rods arranged along the circumference of the centering sleeve (11), one end of the positioning connecting rod is connected to the centering sleeve (11), and the other end is provided with a third through hole, an anti-rotation bolt (7) is provided in the third through hole, and a hexagonal nut (10) is mounted on the anti-rotation bolt (7) for connecting to the positioning hole on the external clutch.

7. The hydraulic release bearing limiting device according to claim 2, characterized in that: It also includes a spring compression sleeve (3) sleeved between the release bearing support sleeve (4) and the limiting step (31); The two ends of the adjustment sleeve (5) close to the release bearing support sleeve (4) abut between the first limiting boss and the spring compression sleeve (3), and the two ends of the other part abut between the first limiting boss and the limiting step (31); the limiting step (31) includes a first step (32) and a second step (33) arranged continuously, and the circumferential side wall of the first step (32) contacts the side surface of the spring (9); The end of the spring (9) abuts against the step surface of the second step (33).

8. The hydraulic release bearing limiting device according to claim 7, characterized in that: The spring compression sleeve (3), the release bearing support sleeve (4) and the adjustment sleeve (5) are connected via bolts.

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