Hydraulic release bearing limiting device
Technical Field
The utility model relates to a bearing limiting device, in particular to a hydraulic release bearing limiting device.
Background
When the actuator of the automatic transmission is filled with the working fluid, the hydraulic release bearing is spaced from the end face of the spigot of the clutch housing by various distances, the hydraulic release bearing is required to be positioned at an initial installation position during filling, and in the filling process, the limit position of the hydraulic release bearing is ensured not to exceed the allowable maximum displacement of the hydraulic release bearing. The conventional method is to install the corresponding clutch and clamp the clutch to the test bed to limit the hydraulic release bearing, and the problems of difficult tool replacement, low production efficiency, low limiting precision, difficult clamping of the transmission and incapability of realizing on-line production of the hydraulic release bearing exist due to large volume and heavy dead weight of the test bed tool and the clutch.
The Chinese patent with publication number of CN202674092U discloses a release bearing assembly of an automobile hydraulic clutch, which comprises a release bearing unit and a hydraulic moving unit, wherein a spring washer is arranged in the release bearing unit and provides axial precompression force, so that the release bearing unit has an automatic aligning function, the installation accuracy of the release bearing is improved, and the position of the release bearing in the installation process is still difficult to control. The Chinese patent with publication number of CN216343539U discloses a support sleeve of a release bearing, which realizes the guiding and supporting of the axial movement of the hydraulic release bearing by arranging a sleeve between the hydraulic release bearing and an input shaft of a speed changer, and the end part of the sleeve is connected with a front shell of the speed changer through a connecting part, so that the axial positioning of the hydraulic release bearing is further realized. But it is mainly used in the normal driving of vehicle, only can be used for the direction and the support of hydraulic release bearing axial displacement, and is relatively poor to the adaptability of not unidimensional hydraulic release bearing, and can't realize overload protection, leads to the stability of structure not enough.
Disclosure of utility model
The utility model aims to solve the problems of poor adaptability and insufficient structural stability of the existing release bearing support sleeve, and provides a hydraulic release bearing limiting device.
In order to achieve the above purpose, the technical solution provided by the present utility model is as follows:
The hydraulic release bearing limiting device is characterized by comprising a release shell positioning structure assembly, a release bearing supporting sleeve, N elastic telescopic components and an adjusting sleeve, wherein N is more than or equal to 2, the release shell positioning structure assembly comprises a cylindrical centering sleeve and a positioning structure, one end of the centering sleeve is an open end, a bottom plate is arranged at the other end of the centering sleeve, a first through hole is formed in the bottom plate along a central axis, the positioning structure is arranged on the outer wall of the centering sleeve and used for being connected and positioned with a clutch shell, the release bearing supporting sleeve is coaxially sleeved in the centering sleeve, one end of the release bearing supporting sleeve extends out of the open end of the centering sleeve, a first limiting boss is arranged on the outer wall close to the end around the circumference of the release bearing supporting sleeve, the other end of the release bearing supporting sleeve extends out of the first through hole, an annular gap is arranged between the release bearing supporting sleeve and the inner wall of the first through hole, so that the release bearing supporting sleeve can axially move in the first through hole, a second through hole is formed in the release bearing supporting sleeve along the central axis, a limiting step is arranged on the outer wall of the release bearing supporting sleeve around the circumference of the release bearing supporting sleeve, the limiting step is positioned in the centering sleeve, one end of the release bearing supporting sleeve, N elastic telescopic components are arranged between N elastic telescopic components and the bottom plate and the elastic telescopic components respectively, and the elastic telescopic components are arranged under the limit step F0 respectively:
F1≤F0<F2
Wherein F1 is the mounting force of the hydraulic release bearing to be limited, and F2 is the maximum working pressure of the hydraulic release bearing to be limited;
The adjusting sleeve is sleeved outside the release bearing supporting sleeve, and two ends of the adjusting sleeve respectively prop against the first limiting boss and the limiting step.
Further, the total pre-pressure F0 satisfies the following relationship:
1.1F1≤F0≤1.5F1<F2。
Further, the elastic telescopic assembly comprises a guide fixing piece, a guide rod and a spring;
the N guide fixing pieces of the elastic telescopic assemblies are of an integrated structure to form a guide ring;
the guide ring is sleeved outside the adjusting sleeve and is connected with the opening end of the centering sleeve;
one end of the guide rod penetrates through the bottom plate, and the other end of the guide rod penetrates through the limit step to be connected with the guide ring;
The spring is sleeved on the guide rod, and two ends of the spring are respectively propped against the bottom plate and the limiting step.
Further, one end of the guide rod is provided with a second limiting boss for abutting against one side, far away from the spring, of the bottom plate, and the other end of the guide rod is provided with a thread structure for being in threaded connection with the guide fixing piece.
Further, the guide ring is connected with the open end of the centering sleeve through a positioning pin.
Further, the location structure includes along the at least three location connecting rod of centering cover circumference setting, the one end of location connecting rod with centering cover is connected, and the other end sets up the third through-hole, is equipped with the anti-rotation bolt in the third through-hole, and the cover is equipped with hexagon nut on the anti-rotation bolt for be connected with the locating hole on the external clutch.
Further, the device also comprises a spring pressing sleeve sleeved between the release bearing supporting sleeve and the limiting step;
the adjusting sleeve is close to the two ends of the supporting sleeve part of the release bearing and is abutted between the first limiting boss and the spring pressing sleeve, and the two ends of the other part of the adjusting sleeve are abutted between the first limiting boss and the limiting step;
The end of the spring is propped against the step surface of the second step.
Further, the spring pressing sleeve, the release bearing supporting sleeve and the adjusting sleeve are connected through bolts.
The utility model has the beneficial effects that:
1. According to the hydraulic release bearing, the release shell positioning structure assembly, the release bearing supporting sleeve and the elastic telescopic component are arranged, so that the position of the hydraulic release bearing is limited, the problems that the position of the hydraulic release bearing is low in limiting precision, difficult in tooling replacement and low in production replacement efficiency when the working fluid is filled are solved, the online production of the hydraulic release bearing cannot be realized, the filling requirement is met, and the release failure of the hydraulic release bearing is prevented.
2. According to the utility model, the adjusting sleeve is arranged, the working fluid is filled into the transmission with different specifications from the axial dimension of the hydraulic release bearing to the spigot end face of the clutch housing, so that the flexible design is realized.
3. The utility model adopts a lightweight design, has small volume, short size chain, high limit precision and easy maintenance, and compared with the prior scheme of using a clutch and a positioning test tray to be arranged on an off-line test rack, the utility model can realize on-line installation, avoid the on-line internal and external transportation of a transmission and shorten the production beat.
4. According to the utility model, the spring, the guide rod, the bottom plate and the limiting step are arranged for elastic limiting, so that the motor of the actuator can be prevented from being locked and overloaded during filling.
Drawings
FIG. 1 is a schematic cross-sectional view of an embodiment of the present utility model;
FIG. 2 is a schematic diagram of an off-shell positioning structure assembly according to an embodiment of the present utility model;
FIG. 3 is a schematic three-dimensional structure of an embodiment of the present utility model;
FIG. 4 is a schematic view of the structure of the installation state of the embodiment of the present utility model;
FIG. 5 is a schematic cross-sectional view of an installed state of an embodiment of the present utility model;
Fig. 6 is a schematic diagram of spring deformation in an embodiment of the utility model.
Reference numerals illustrate:
1-shell-leaving positioning structure assembly, 11-centering sleeve, 12-positioning structure, 2-guide rod, 3-spring pressing sleeve, 31-limiting step, 32-first step, 33-second step, 4-release bearing supporting sleeve, 41-hydraulic release bearing, 5-adjusting sleeve, 6-guide fixing piece, 7-rotation-preventing bolt, 8-positioning pin, 9-spring and 10-hexagonal nut.
Detailed Description
The structure of the hydraulic release bearing limiting device is shown in fig. 1, and comprises a release bearing supporting sleeve 4, N elastic telescopic components and an adjusting sleeve 5,N is more than or equal to 2, wherein in the embodiment, N=4.
The shell-separating positioning structure assembly 1 comprises a cylindrical centering sleeve 11 and a positioning structure 12, as shown in fig. 2, in the embodiment, three positioning structures 12 are arranged, one end of the centering sleeve 11 is an open end, the other end of the centering sleeve is provided with a bottom plate, a first through hole is formed in the bottom plate along a central axis, the positioning structure 12 comprises at least three positioning connecting rods circumferentially arranged along the centering sleeve 11, one ends of the positioning connecting rods are connected with the centering sleeve 11, welding is adopted in the embodiment, and in order to ensure the centering positioning and axial limiting precision, the dimensions related to matching are processed after welding.
The separating bearing support sleeve 4 is coaxially sleeved in the centering sleeve 11, one end of the separating bearing support sleeve 4 extends out of the opening end of the centering sleeve 11, a first limit boss is arranged on the outer wall close to the end around the circumference of the opening end, the other end of the separating bearing support sleeve 4 extends out of the first through hole, an annular gap is arranged between the separating bearing support sleeve and the inner wall of the first through hole, the separating bearing support sleeve 4 can axially move in the first through hole, a second through hole is formed in the separating bearing support sleeve 4 along the central axis of the separating bearing support sleeve, the second through hole is a step hole, the large-diameter end corresponds to the first limit boss, the structural size is reduced as much as possible in consideration of the fact that the weight of the hydraulic separating bearing limiting device cannot be too large, the structural design is compact, the size of the separating bearing support sleeve 4 is relatively close to the size of the hydraulic separating bearing 41, therefore the step hole is formed, structural interference between the separating bearing support sleeve 4 and the front end of the hydraulic separating bearing 41 is avoided, and the first through hole is large enough in size, and the step hole is not required to be formed. The middle part of the outer wall of the release bearing supporting sleeve 4 is sleeved with a spring pressing sleeve 3, the outer wall of the spring pressing sleeve 3 is provided with a limiting step 31 around the circumferential direction, the adjusting sleeve 5 is sleeved outside the release bearing supporting sleeve 4, two ends of the adjusting sleeve 5, which are close to the release bearing supporting sleeve 4, are respectively abutted against the first limiting boss and the spring pressing sleeve 3, two ends of the other part are respectively abutted against the first limiting boss and the limiting step 31, the adjusting sleeve 5 has various specifications and corresponds to the speed change of different sizes, and the change is convenient, so that the adjusting sleeve is suitable for different distances from the hydraulic release bearing 41 to the clutch spigot of the speed change.
The limiting step 31 comprises a first step 32 and a second step 33 which are continuously arranged, the elastic telescopic assembly comprises a guide fixing piece 6, a guide rod 2 and a spring 9, the guide fixing pieces 6 of the 4 elastic telescopic assemblies are of an integrated structure for convenient installation, a guide ring is formed and sleeved outside the adjusting sleeve 5 and connected with the opening end of the centering sleeve 11 through a positioning pin, one end of the guide rod 2 is arranged on the bottom plate in a penetrating mode, a second limiting boss is arranged at the end of the guide rod, the second limiting boss abuts against one side of the bottom plate far away from the guide ring, a threaded structure is arranged at the other end of the guide rod 2, the guide rod penetrates through the second step 33 and is in threaded connection with the guide ring, the spring 9 is sleeved on the guide rod 2, two ends of the spring 9 abut against the step surfaces of the bottom plate and the second step 33 respectively, the side wall of the first step 32 contacts with the outer side surface of the spring 9, limiting is carried out on the outer side surface of the guide ring, and the stability of the second step is improved. The guide bar 2 provides guidance for the second step 33 and the spring 9, avoiding its deflection. The springs 9 are preloaded during installation, the total preload of the springs 9 being slightly greater than the installation force of the hydro-release bearing 41 in order to limit the hydro-release bearing 41 to the initial installation position. The limiting of the hydraulic release bearing 41 can be realized by the value range of F1-F0 < F2 of the total precompression F0 of the 4 springs 9, wherein F1 is the mounting force of the hydraulic release bearing 41 to be limited, F2 is the maximum working pressure of the hydraulic release bearing 41 to be limited, but if the precompression of the springs 9 is too large, the length of the springs 9 is too long, the axial dimension of the hydraulic release bearing limiting device is increased, if the precompression of the springs 9 is too small, the precompression is insufficient to overcome the mounting force, and the hydraulic release bearing 41 cannot be limited to the initial mounting position, so that in actual operation, the value range of the total precompression F0 is preferably 1.1F1-F0-1.5F2.
The guide fixing piece 6 is provided with a pin hole corresponding to one end of the centering sleeve 11, wherein the positioning pin 8 is arranged to realize fixed connection, so that the guide failure of the guide rod 2 caused by the rotation of the guide fixing piece 6 is prevented.
In order to improve the stability of the hydraulic release bearing limiting device and facilitate the disassembly and the assembly, the spring pressing sleeve 3, the release bearing supporting sleeve 4 and the adjusting sleeve 5 are connected and pressed through bolts, and bear the thrust from the hydraulic release bearing 41 together.
As shown in fig. 2 to 4, a third through hole is formed at the other end of the positioning connecting rod and corresponds to a positioning hole on the clutch housing of the transmission, an anti-rotation bolt 7 is arranged in the corresponding third through hole and positioning hole, a hexagonal nut 10 is sleeved on the anti-rotation bolt 7 for fixation, and the connection positioning of the hydraulic release bearing limiting device and the clutch housing of the transmission is realized. The specific use process of the utility model is as follows:
1. And (3) installing a limiting device, namely, as shown in fig. 4 and 5, firstly, selecting a proper adjusting sleeve 5 according to the size of the transmission, installing the adjusting sleeve 5 between a release bearing supporting sleeve 4 and a spring pressing sleeve 3, aligning three claws of a limiting tool with a clutch shell spigot of the transmission, applying axial force, and pushing a hydraulic release bearing 41 to an initial installation position, wherein the installation force of the hydraulic release bearing 41 is smaller than the pre-pressure of a spring 9, and as shown in fig. 6, the spring 9 is positioned at the initial installation position after being pre-pressed, the spring 9 cannot be deformed further in the installation process, and the limiting device and the clutch shell of the transmission are fixed through a hexagonal nut 10, so that the installation can be completed.
2. Filling working fluid, namely filling the working fluid after installing the limiting device, wherein the hydraulic release bearing 41 can reciprocate during filling, the spring 9 works in the working deformation area shown in fig. 6, and when the pressure is too high, the spring 9 works in the overload deformation area, and the process is still elastic deformation, so that buffering can be provided before the protection program of the motor is started, and the motor is prevented from being blocked and damaged.
3. And (5) filling is completed, and the limiting device is dismounted.
While the utility model has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made without departing from the spirit and scope of the utility model.