Oil seal press fitting device

Abstract

The utility model discloses an oil seal press-fitting device and relates to the technical field of machining. The oil seal press-fitting device comprises a machine base, a fixed press-fitting mechanism, a movable press-fitting mechanism and a shaft mounting mechanism. The fixed press-fitting mechanism is arranged on the machine base and provided with a first press-fitting position, the movable press-fitting mechanism is movably arranged on the machine base and provided with a second press-fitting position, and the shaft mounting mechanism is slidably arranged on the machine base and located between the fixed press-fitting mechanism and the movable press-fitting mechanism. The two ends of the mounting shaft are opposite to the first press-fitting position and the second press-fitting position correspondingly, and the shaft mounting mechanism can be pushed to synchronously move towards the fixed press-fitting mechanism by controlling the movable press-fitting mechanism to move towards the direction where the fixed press-fitting mechanism is located till the first oil seal and the second oil seal are pressed at the two ends of the mounting shaft. Through the press-fitting mode that the movable press-fitting mechanism moves on one side to apply press-fitting force, the consistency of the press-fitting force of the oil seals at the two ends of the mounting shaft and the accuracy of the press-fitting size are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, and more specifically to an oil seal press-fitting device. Background Art

[0002] The front axle is a device that transmits the forces acting in all directions between the frame and the front wheel and the bending moment and torque generated by them. Oil seal press-fitting and leak testing are key processes in the production of front axle products, and front axle products have high process requirements for oil seal press-fitting and airtight testing.

[0003] The traditional oil seal press-fitting process uses the front axle assembly as the positioning reference, and the oil seal press-fitting mechanisms on both sides are driven by cylinders to press-fit the oil seals synchronously. This press-fitting method has the problem of unbalanced press-fitting force on both sides of the oil seal, and it is easy for the oil seal on one end to not be pressed into place. At the same time, the existing oil seal press-fitting head structure is easy to damage the oil seal lip during the press-fitting process, resulting in oil leakage or oil seepage.

[0004] The traditional oil seal leak test device will seal the reducer and both end faces of the sleeve of the front axle assembly, which is a face seal. In fact, after the whole vehicle is assembled, the drive shafts at both ends of the vehicle are sealed with the oil seal lips, which is not a face seal. Therefore, the current leak test device cannot simulate the actual installation of the whole vehicle, and the phenomenon of oil leakage or oil seepage may occur after the actual installation even though the leak test is qualified.

[0005] Furthermore, since the current oil seal pressing and leak testing are two different workstations, at least two operators are required to operate them respectively, and the front axle assembly needs to be rotated between different workstations, the production efficiency is low and the labor cost is high.

[0006] Therefore, how to solve at least one of the above problems has become a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0007] In view of this, the purpose of the utility model is to provide an oil seal press-fitting device to ensure the consistency of the oil seal press-fitting force at both ends of the installation shaft.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] An oil seal press-fitting device, used for press-fitting a first oil seal and a second oil seal to two ends of a mounting shaft, comprising:

[0010] Machine base;

[0011] A fixed press-fitting mechanism, which is disposed on the machine base and is provided with a first press-fitting position for installing the first oil seal;

[0012] A movable press-fitting mechanism is movably disposed on the machine base and is provided with a second press-fitting position for installing the second oil seal, and the second press-fitting position is opposite to the first press-fitting position;

[0013] The shaft mounting mechanism is slidably disposed on the machine base and is located between the fixed pressing mechanism and the movable pressing mechanism, and is used to fix the mounting shaft. The movable pressing mechanism is used to push the shaft mounting mechanism in the direction of the fixed pressing mechanism so that the first oil seal and the second oil seal are pressed tightly on both ends of the mounting shaft.

[0014] Optionally, in the above-mentioned oil seal press-fitting device, the fixed press-fitting mechanism comprises a fixed seat and a fixed pressing plate, the fixed seat is arranged on the machine base, the fixed pressing plate is connected to the fixed seat via a first elastic member, and the first pressing position is formed on a side of the fixed pressing plate facing away from the fixed seat; and / or,

[0015] The movable pressing mechanism comprises a movable seat and a movable pressing plate. The movable seat is movably arranged on the machine base. The movable pressing plate is connected to the movable seat via a second elastic member. The second pressing position is formed on the side of the movable pressing plate facing away from the movable seat.

[0016] Optionally, in the above-mentioned oil seal press-fitting device, a first limit portion is provided on one of the fixing seat and the fixing pressure plate, and the first limit portion is used to abut against the other of the fixing seat and the fixing pressure plate to limit the limit state of compression of the first elastic member; and / or,

[0017] A second limiting portion is provided on one of the movable seat and the movable pressing plate, and the second limiting portion is used to abut against the other of the movable seat and the movable pressing plate to limit the limit state of compression of the second elastic member.

[0018] Optionally, in the above-mentioned oil seal press-fitting device, a press-fitting station is formed between the fixed press-fitting mechanism and the movable press-fitting mechanism;

[0019] The machine base is provided with a leak testing mechanism, the leak testing mechanism comprises a first leak testing component and a second leak testing component respectively used to cooperate with the first oil seal and the second oil seal, and a leak testing station is formed between the first leak testing component and the second leak testing component;

[0020] In the first state, the shaft installation mechanism is located at the press-fitting station, and in the second state, the shaft installation mechanism is located at the leak testing station.

[0021] Optionally, in the above-mentioned oil seal pressing device, a first guide rail is provided on the machine base, the first guide rail extends to the fixed pressing mechanism, a first slide seat and a second slide seat are slidably provided on the first guide rail, the shaft mounting mechanism is provided on the first slide seat, and the movable pressing mechanism is provided on the second slide seat.

[0022] Optionally, in the above-mentioned oil seal press-fitting device, a second guide rail is provided on the machine base, a third slide seat is slidably provided on the second guide rail, and the fixed press-fitting mechanism and the first leakage test assembly are provided on the third slide seat;

[0023] A third guide rail is arranged on the second slide seat, and the extension directions of the third guide rail and the second guide rail both have an angle with the extension direction of the first guide rail. A fourth slide seat is slidably arranged on the third guide rail, and the movable pressing mechanism and the second leakage test assembly are arranged on the fourth slide seat.

[0024] Optionally, in the above-mentioned oil seal press-fitting device, the first leakage test assembly includes a first leakage test pressure head, the first end of the first leakage test pressure head is arranged on the third slide seat, and the second end is provided with a first guide column and a first fitting portion, the first guide column is used to pass through the first oil seal, the first fitting portion is used to position and cooperate with the end of the installation shaft, and the first fitting portion is provided with a first leakage hole; and / or,

[0025] The second leakage test assembly includes a second leakage test pressure head, the first end of the second leakage test pressure head is arranged on the fourth slide seat, and the second end is provided with a second guide column and a second fitting portion, the second guide column is used to pass through the second oil seal, the second fitting portion is used to position and cooperate with the end of the mounting shaft, and the second fitting portion is provided with a second leakage hole.

[0026] Optionally, in the above-mentioned oil seal press-fitting device, the first guide column includes a first positioning column and a first profile matching portion, two ends of the first positioning column are respectively connected to the first leak test pressure head and the first profile matching portion, and the outer diameter of the first positioning column is larger than the outer diameter of the first profile matching portion, and is used to match with the lip of the first oil seal, and one end of the first positioning column close to the first profile matching portion is a chamfered structure; and / or,

[0027] The second guide column includes a second positioning column and a second profile fitting portion, the two ends of the second positioning column are respectively connected to the second leak test head and the second profile fitting portion, and the outer diameter of the second positioning column is larger than the outer diameter of the second profile fitting portion, and is used to cooperate with the lip of the second oil seal, and one end of the second positioning column close to the second profile fitting portion is a chamfered structure.

[0028] Optionally, in the above-mentioned oil seal press-fitting device, an oil seal feeding mechanism is provided on the machine base, the oil seal feeding mechanism is used to convey the oil seal to the press-fitting mechanism, the press-fitting mechanism includes the fixed press-fitting mechanism and / or the movable press-fitting mechanism, the oil seal includes the first oil seal and / or the second oil seal, and the oil seal feeding mechanism includes:

[0029] A first loading body is disposed on the machine base and is provided with a first half groove;

[0030] A second loading body is connected to the first loading body and is provided with a second half groove, the first half groove and the second half groove are opposite to each other and form a loading groove for the oil seal to be inserted, the loading groove extends to the pressing position of the pressing mechanism, the pressing position of the fixed pressing mechanism is the first pressing position, and the pressing position of the movable pressing mechanism is the second pressing position;

[0031] A discharging assembly is arranged on the first loading body or the second loading body, and is used for controlling the discharging of the oil seal.

[0032] Optionally, in the above-mentioned oil seal pressing device, the spacing distance between the first loading body and the second loading body is adjustable.

[0033] The oil seal pressing device provided by the utility model is used for pressing two oil seals to two ends of the installation shaft respectively to realize the installation of the oil seals. For the convenience of expression, the two oil seals are defined as the first oil seal and the second oil seal respectively. The oil seal pressing device comprises a machine base, a fixed pressing mechanism, a movable pressing mechanism and a shaft installation mechanism. The fixed pressing mechanism is arranged on the machine base and is provided with a first pressing position, the first pressing position is used to install the first oil seal, so as to fix the position of the first oil seal on the fixed pressing mechanism; the movable pressing mechanism is movably arranged on the machine base and is provided with a second pressing position for installing the second oil seal, so as to fix the position of the second oil seal on the movable pressing mechanism, and the second pressing position is opposite to the first pressing position; the shaft mounting mechanism is used to fix the mounting shaft, which is slidably arranged on the machine base and is located between the fixed pressing mechanism and the movable pressing mechanism, so that after the mounting shaft is assembled to the shaft mounting mechanism, the two ends of the mounting shaft can be respectively opposite to the first pressing position and the second pressing position, that is, respectively opposite to the positions of the first oil seal and the second oil seal, so that by controlling the movable pressing mechanism to move in the direction where the fixed pressing mechanism is located, the shaft mounting mechanism can be pushed to move synchronously toward the fixed pressing mechanism until the first oil seal and the second oil seal are pressed tightly at the two ends of the mounting shaft.

[0034] Compared with the prior art, the oil seal pressing device provided by the utility model ensures the consistency of the oil seal pressing force at both ends of the installation shaft and the accuracy of the pressing dimensions by moving the pressing mechanism unilaterally to apply the pressing force, thus meeting the quality requirements of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 The structure of the oil seal press-fit device disclosed in the embodiment of the utility model is schematically shown. Figure 1 ;

[0037] Figure 2 The structure of the oil seal press-fit device disclosed in the embodiment of the utility model is schematically shown. Figure 2 ;

[0038] Figure 3 It is a structural schematic diagram of the fixed pressing mechanism disclosed in the embodiment of the utility model;

[0039] Figure 4 It is a schematic diagram of the first oil seal feeding to the fixed press-fitting mechanism disclosed in the embodiment of the utility model;

[0040] Figure 5 It is a structural schematic diagram of a first leak test assembly disclosed in an embodiment of the utility model;

[0041] Figure 6 It is a schematic diagram of the overall structure of the oil seal feeding mechanism disclosed in the embodiment of the utility model;

[0042] Figure 7 The figure is a schematic diagram of the internal structure of the oil seal feeding mechanism disclosed in the embodiment of the utility model.

[0043] Among them, 100 is a machine base, 101 is a detection device, 102 is a roller, 103 is a lifting foot, 110 is a first guide rail, and 120 is a first switching cylinder;

[0044] 200 is a fixed press-fitting mechanism, 201 is a fixed seat, 202 is a fixed pressing plate, 2021 is a fixed pressing head, 2022 is a fixed inner guide rod, 203 is a first elastic member, 204 is a guide mechanism, 205 is a first press-fitting slot, and 210 is a movable press-fitting mechanism;

[0045] 300 is a first leak test assembly, 301 is a leak test base, 302 is a first leak test pressure head, 3021 is a first air leakage hole, 3022 is a first positioning column, 3023 is a first profile matching portion, and 310 is a second leak test assembly;

[0046] 400 is a shaft installation mechanism, 410 is a positioning assembly, and 420 is a clamping assembly;

[0047] 500 is an oil seal feeding mechanism, 510 is a first feeding body, 520 is a second feeding body, 530 is a first cylinder, 531 is a second cylinder, 540 is a bracket assembly, and 550 is a hand wheel. DETAILED DESCRIPTION

[0048] The core of the utility model is to disclose an oil seal pressing device to ensure the consistency of the oil seal pressing force at both ends of the installation shaft.

[0049] The following is an explanation of the embodiments with reference to the accompanying drawings. In addition, the embodiments shown below do not limit the contents of the utility model described in the claims. In addition, the entire contents of the structures represented by the following embodiments are not limited to those necessary as solutions of the utility model described in the claims. It should be noted that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings. In the absence of conflict, the embodiments in the utility model and the features in the embodiments can be combined with each other.

[0050] Combination Figure 1 The oil seal pressing device disclosed in the embodiment of the utility model is used to press two oil seals to the two ends of the installation shaft respectively to achieve the installation of the oil seal. For the convenience of expression, the two oil seals are defined as the first oil seal and the second oil seal respectively. The oil seal pressing device includes a base 100, a fixed pressing mechanism 200, a movable pressing mechanism 210 and a shaft installation mechanism 400.

[0051] The fixed press-fitting mechanism 200 is arranged on the machine base 100 and is provided with a first press-fitting position, which is used to install the first oil seal, so as to fix the position of the first oil seal on the fixed press-fitting mechanism 200. The movable press-fitting mechanism 210 is movably arranged on the machine base 100 and is provided with a second press-fitting position for installing the second oil seal, so as to fix the position of the second oil seal on the movable press-fitting mechanism 210, and the second press-fitting position is opposite to the first press-fitting position. The shaft installation mechanism 400 is used to fix the installation shaft, and is slidably arranged on the machine base 100. 0, and is located between the fixed pressing mechanism 200 and the movable pressing mechanism 210, so that after the installation shaft is assembled to the shaft installation mechanism 400, the two ends of the installation shaft can be respectively opposite to the first pressing position and the second pressing position, that is, respectively opposite to the positions of the first oil seal and the second oil seal, so that by controlling the movable pressing mechanism 210 to move in the direction where the fixed pressing mechanism 200 is located, the shaft installation mechanism 400 can be pushed to move synchronously toward the fixed pressing mechanism 200 until the first oil seal and the second oil seal are pressed against the two ends of the installation shaft.

[0052] Specifically, the first oil seal, the second oil seal and the mounting shaft can be assembled to the first pressing position, the second pressing position and the shaft mounting mechanism 400 respectively by manual means, a lifting device or a feeding mechanism. After being assembled in place, the mobile pressing mechanism 210 is controlled to move in the direction of the fixed pressing mechanism 200, and drives the shaft mounting mechanism 400 to slide. The mounting shaft is first pressed between the fixed pressing mechanism 200 and the mobile pressing mechanism 210, so that the first oil seal and the second oil seal are both located at both ends of the mounting shaft. The mobile pressing mechanism 210 is further pressed in the direction of the fixed pressing mechanism 200, so that the first oil seal and the second oil seal can be simultaneously pressed at both ends of the mounting shaft, and the consistency of the pressing force can be ensured. After being pressed in place, the mobile pressing mechanism 210 is withdrawn, and the first oil seal and the second oil seal can be reliably assembled to the mounting shaft, and the oil seal pressing process is completed.

[0053] Compared with the prior art, the oil seal pressing device disclosed in the embodiment of the utility model adopts a pressing method in which the pressing force is applied by unilateral movement of the mobile pressing mechanism 210, thereby ensuring the consistency of the oil seal pressing force at both ends of the installation shaft and the accuracy of the pressing dimensions, thereby meeting the quality requirements of the product.

[0054] The installation shaft may specifically be a shaft product such as a front axle that requires installation of an oil seal.

[0055] Combination Figure 2 A roller 102 and a lifting foot 103 may be provided at the bottom of the machine base 100. The roller 102 may drive the machine base 100 to move, and the lifting foot 103 may be raised and lowered to switch the machine base 100 between the operating mode (stop state) and the moving mode.

[0056] The mobile pressing mechanism 210 can be moved on the machine base 100 by driving a driving device such as a cylinder, a hydraulic cylinder, or a motor. Preferably, the mobile pressing mechanism 210 and the fixed pressing mechanism 200 have the same structure and are symmetrically arranged, and the fixed pressing mechanism 200 is fixedly arranged on the machine base 100, and the mobile pressing mechanism 210 is slidably arranged on the machine base 100 by a driving device, and can move in a direction close to or away from the fixed pressing mechanism 200.

[0057] Since there may be errors in the specific installation positions of the first oil seal at the first press-fit position and the second oil seal at the second press-fit position, in order to ensure the assembly accuracy of the first oil seal, the second oil seal and the installation shaft, in a specific embodiment disclosed in the present utility model, Figure 3The fixed pressing mechanism 200 includes a fixed seat 201 and a fixed pressing plate 202. The fixed seat 201 is arranged on the machine base 100. Specifically, it can be arranged in various ways such as screw connection, clamping connection, pin connection, etc., and is used as an installation basis for the fixed pressing plate 202. The fixed pressing plate 202 is connected to the fixed seat 201 through a first elastic member 203. A first pressing position is formed on the side of the fixed pressing plate 202 facing away from the fixed seat 201.

[0058] Correspondingly, the movable pressing mechanism 210 includes a movable seat and a movable pressing plate. The movable seat is movably arranged on the machine base 100. The movable pressing plate is connected to the movable seat through a second elastic member, and a second pressing position is formed on the side of the movable pressing plate facing away from the movable seat. The first pressing position is opposite to the second pressing position.

[0059] During the press-fitting process, when the movable pressing plate moves to contact the installation shaft, the movable pressing mechanism 210 continues to advance and pushes the installation shaft to drive the shaft installation mechanism 400 to slide, and at the same time the second elastic member is compressed, so that the second oil seal can automatically correct the assembly position on the installation shaft. As the movable pressing mechanism 210 continues to advance, the installation shaft is pushed onto the fixed pressing plate 202 and contacts the first oil seal. After being further pressed, the first elastic member 203 is compressed and the assembly position of the first oil seal on the installation shaft is adaptively adjusted until the first elastic member 203 and the second elastic member are both compressed to the limit position or the set limit position, indicating that the first oil seal and the second oil seal have been pressed into place. At this time, the movable pressing mechanism 210 can move in the opposite direction to release the pressure on the installation shaft. The first oil seal and the second oil seal are both assembled to the two ends of the installation shaft, and the press-fitting is completed.

[0060] The elastic member, namely the first elastic member 203 and the second elastic member, can automatically correct the assembly position of the first oil seal and the second oil seal on the installation shaft during the press-fitting process, thereby avoiding being pressed off and improving the installation accuracy. The elastic member can be a rectangular spring.

[0061] The limit position of compression of the elastic part is the limit state of compression of the elastic part itself. In some embodiments, the limit position of compression of the elastic part can be limited by setting some structures to avoid failure of the elastic part due to excessive pressing force, while ensuring the accuracy of dimensional control of the oil seal pressing position.

[0062] Specifically, a first limiting portion is provided on one of the fixed seat 201 and the fixed pressure plate 202, and the first limiting portion is used to abut against the other of the fixed seat 201 and the fixed pressure plate 202 to limit the extreme state of compression of the first elastic member 203; a second limiting portion is provided on one of the movable seat and the movable pressure plate, and the second limiting portion is used to abut against the other of the movable seat and the movable pressure plate to limit the extreme state of compression of the second elastic member.

[0063] Taking the first limit part set on the fixed pressure plate 202 as an example, the end of the fixed pressure plate 202 facing the fixed seat 201 is rectangular, the first limit part is set on the side of the fixed pressure plate 202 facing the fixed seat 201, and is a block-shaped (for example, cylindrical) structure protruding from the fixed pressure plate 202. The first limit part can be arranged symmetrically with the first elastic member 203, for example, the first elastic member 203 is symmetrically arranged at the four corners of the fixed pressure plate 202 to ensure uniform force. During the press-fitting process, when the first elastic member 203 is compressed by force to the point that the first limit part abuts against the fixed seat 201, the elastic member cannot be further compressed, indicating that the press-fitting is in place.

[0064] Furthermore, a sliding guide mechanism 204 can be provided between the fixed seat 201 and the fixed pressure plate 202 to guide the extension and retraction process of the first elastic member 203. In one embodiment, a guide column is provided on the side of the fixed seat 201 facing the fixed pressure plate 202, and a guide hole is opened axially on the guide column. A guide rod is provided on the side of the fixed pressure plate 202 facing the fixed seat 201, and the guide rod can be slidably provided in the guide hole. During the extension and retraction process of the first elastic member 203, the guide rod slides in the guide hole to achieve guidance.

[0065] Correspondingly, a guiding mechanism may also be provided on the movable seat and the movable pressing plate to guide the extension and retraction process of the second elastic member.

[0066] The fixed press-fitting mechanism 200 and the movable press-fitting mechanism 210 are specifically configured with components for press-fitting in combination with the specific structure of the oil seal (the first oil seal and the second oil seal) and the mounting shaft. Figure 3 A ring-shaped fixed pressure head 2021 is protruded on the side of the fixed pressure plate 202 facing away from the fixed seat 201, and a fixed inner guide rod 2022 is coaxially arranged on the inner ring of the fixed pressure head 2021. The outer ring of the fixed pressure head 2021 is positioned and matched with the inner ring of the first oil seal, and the end face of the fixed pressure plate 202 is matched with the end face of the first oil seal. The fixed inner guide rod 2022 corresponds to the lip position of the first oil seal to push the first oil seal to move. The fixed pressure head 2021 and the fixed inner guide rod 2022 form the above-mentioned first press-fitting position. The specific structure of the mobile press-fitting mechanism 210 is the same as that of the fixed press-fitting mechanism, which will not be repeated here.

[0067] Furthermore, one end of the fixed inner guide rod 2022 is set on the fixed seat 201, and the other end passes through the fixed pressure plate 202 and is coaxially arranged with the fixed pressure head 2021. When the first elastic member 203 is compressed, the fixed inner guide rod 2022 is further exposed relative to the fixed pressure plate 202, and can push the first oil seal to move to press it on the mounting shaft.

[0068] In the prior art, the press-fitting process and the leak-testing process of the oil seal are implemented separately at two workstations, and the cooperation of multiple operators is required to complete the operation, resulting in a waste of labor. In order to realize the integrated operation of the oil seal press-fitting and the leak-testing and reduce the labor cost, in a specific embodiment disclosed in the utility model, a leak-testing mechanism is also provided on the machine base 100, and the leak-testing mechanism includes a first leak-testing component 300 and a second leak-testing component 310. The first leak-testing component 300 corresponds to the position of the first oil seal, and the second leak-testing component 310 corresponds to the position of the second oil seal. A leak-testing workstation is defined between the first leak-testing component 300 and the second leak-testing component 310. The fixed press-fitting mechanism 200 and the movable press-fitting mechanism 210 constitute a press-fitting mechanism, and a press-fitting workstation of the press-fitting mechanism is formed between the two. In the first state, the shaft installation mechanism 400 is located at the pressing station to perform the above-mentioned oil seal pressing process. In the second state, the shaft installation mechanism 400 is located at the leakage testing station to perform the oil seal leakage testing process. The flow of the process is achieved by switching the position of the shaft installation mechanism 400 between the pressing station and the leakage testing station to complete the integrated operation of oil seal pressing and leakage testing.

[0069] Specifically, the positions of the pressing mechanism and the leakage testing mechanism can be kept unchanged, and the position switching of the shaft mounting mechanism 400 between the pressing station and the leakage testing station can be achieved by moving the position of the shaft mounting mechanism 400. Alternatively, the position of the shaft mounting mechanism 400 can be kept unchanged, and the position switching of the shaft mounting mechanism 400 can be achieved by moving the position of the pressing mechanism and the leakage testing mechanism.

[0070] Preferably, the press-fitting station and the leak-testing station can be arranged parallel to each other, and the installation shaft has the same posture at the press-fitting station and the leak-testing station, and the operation steps of the leak-testing process are similar to those of the press-fitting process, so that the second leak-testing component 310 moves toward the direction of the first leak-testing component 300, and the two ends of the installation shaft correspond to the first leak-testing component 300 and the second leak-testing component 310 respectively, so as to facilitate the position switching of the shaft installation mechanism 400 between the press-fitting station and the leak-testing station.

[0071] For example, two sets of movable guide rails can be set on the machine base 100. The two sets of movable guide rails are parallel to each other and are respectively used for the sliding of the movable pressing mechanism 210 and the second leakage testing component 310. At the same time, the same sliding seat can be slidably provided on the two sets of guide rails, and a set of switching guide rails is provided on the sliding seat. The shaft installation mechanism 400 can switch between the leakage testing station and the pressing station by sliding on the switching guide rail. The sliding seat can be pushed and moved by the movable pressing mechanism 210 or the second leakage testing component 310 by sliding on the movable guide rail for pressing or leakage testing, thereby realizing the integration of the oil seal pressing station and the leakage testing station, reducing the turnover of parts, improving work efficiency, and reducing the number of employees and costs.

[0072] In one embodiment, a first guide rail 110 is provided on the machine base 100, and the first guide rail 110 extends to the fixed pressing mechanism 200. A first slide and a second slide are slidably provided on the first guide rail 110. The shaft mounting mechanism 400 is provided on the first slide, and the mobile pressing mechanism 210 is provided on the second slide. By sliding the first slide and the second slide on the first guide rail 110, the mobile pressing mechanism 210 pushes and presses the shaft mounting mechanism 400.

[0073] Furthermore, a detection device 101 such as a proximity switch or a sensor is provided at the end of the first guide rail 110 to control the extreme position of the sliding of the second slide seat to avoid slipping.

[0074] The first slide and the second slide can both be plate-like structures, one side of which is provided with a slider structure for slidingly cooperating with the first guide rail 110, and the other side is a plane structure for installation by the shaft installation mechanism 400 or the mobile press-fitting mechanism 210.

[0075] The shaft mounting mechanism 400 is used to position the mounting shaft. In one embodiment, the shaft mounting mechanism 400 includes a positioning assembly 410 and a clamping assembly 420. The positioning assembly 410 can position the mounting shaft, and may specifically include an axial positioning column and a radial positioning column. The clamping assembly 420 may specifically be a plurality of groups of cylinders to respectively clamp at a plurality of positions of the mounting shaft, thereby achieving reliable fixation of the mounting shaft and avoiding movement during the oil seal press-fitting or leak testing process.

[0076] In the above embodiment, the shaft mounting mechanism 400 and the movable pressing mechanism 210 are arranged on the same guide rail (first guide rail). It should be noted that the shaft mounting mechanism 400 and the movable pressing mechanism 210 can also be arranged on two sets of guide rails that are parallel to each other but different. The former is the preferred solution with low cost and convenient layout.

[0077] In one embodiment, a second guide rail is provided on the machine base 100, a third slide is slidably provided on the second guide rail, a fixed pressing mechanism 200 and a first leakage test component 300 are provided on the third slide, a third guide rail is provided on the second slide, an extension direction of the third guide rail and the second guide rail both have an angle with the extension direction of the first guide rail, and the angle is not 0, a fourth slide is slidably provided on the third guide rail, and a movable pressing mechanism 210 and a second leakage test component 310 are provided on the fourth slide.

[0078] Combination Figure 1 In this embodiment, the shaft installation mechanism 400 always slides on the first guide rail 110, and the pressing mechanism and the leakage test mechanism are moved relative to the shaft installation mechanism 400 through the sliding of the third slide and the fourth slide, so as to switch the position of the installation shaft between the pressing station and the leakage test station, and the pressing mechanism and the leakage test mechanism can be pressed on the installation shaft through the sliding of the second slide.

[0079] Specifically, the position movement of the third slide on the second guide rail is achieved by the first switching cylinder 120 disposed on the machine base 100, and the position movement of the fourth slide on the third guide rail can be achieved by the second switching cylinder disposed on the second slide.

[0080] To facilitate layout, Figure 1 As shown, the second guide rail and the third guide rail are parallel to each other and are both arranged perpendicular to the first guide rail 110 .

[0081] The leak test process is to detect the sealing of the connection between the oil seal and the mounting shaft. However, during the leak test process, the leak test pressure head of the leak test mechanism in the prior art will be positioned with the mounting shaft outside the oil seal. The surface contact between the two will cause a certain degree of sealing, which will in turn affect the sealing test results of the oil seal and the mounting shaft, and is inconsistent with the actual assembly state of the whole vehicle. Therefore, a leakage hole is provided at the positioning position of the leak test mechanism and the mounting shaft to prevent the positioning cooperation of the leak test mechanism and the mounting shaft from affecting the sealing test of the oil seal, so that the leak test mechanism can more accurately identify the sealing performance between the oil seal and the mounting shaft.

[0082] Specifically, combined Figure 5 The first leakage test component 300 includes a first leakage test pressure head 302, a first end of the first leakage test pressure head 302 is arranged on the third slide seat, and a first guide column and a first fitting portion are arranged on the second end, the first guide column is used to pass through the first oil seal and realize the positioning of the mounting shaft and the first leakage test component 300, the first fitting portion is used to fit with the end (outer wall or end face) of the mounting shaft, and a first leakage hole 3021 is arranged on the first fitting portion, the setting of the first leakage hole 3021 makes the first leakage test pressure head 302 only seal with the lip of the first oil seal, and the fitting part with the mounting shaft is a non-sealed structure, so that during the leakage test, the positioning and matching of the first leakage test pressure head 302 with the mounting shaft will not affect the airtightness test at the first oil seal and simulate the actual loading state.

[0083] The first leak test head 302 can be arranged on the machine base through the leak test base 301, and the first leak test head 302 and the leak test base 301 can be connected by bolts or the like. The first air leakage hole 3021 can be a notch opened at the end of the first leak test head 302, and the notch can be U-shaped, so that at the first air leakage hole 3021, the first leak test assembly 300 has no contact with the mounting shaft, and air leakage can be achieved.

[0084] The second leakage test component 310 has the same structure as the first leakage test component 300 and is symmetrically arranged. Specifically, the second leakage test component 310 includes a second leakage test pressure head, the first end of the second leakage test pressure head is arranged on the fourth slide seat, the second end is provided with a second guide column and a second fitting portion, the second guide column is used to pass through the second oil seal, the second fitting portion is used to fit with the end portion (outer wall or end face) of the mounting shaft, and the second fitting portion is provided with a second leakage hole.

[0085] The specific components and related operating procedures related to the leak test of the leak test mechanism are all existing technologies and will not be repeated here.

[0086] During the leak testing process, the first guide column and the second guide column need to pass through the first oil seal and the second oil seal respectively and be embedded in the end of the mounting shaft. Therefore, in order to facilitate the cooperation between the first guide column and the second guide column and the first oil seal and the second oil seal, the first guide column and the second guide column are provided with chamfered structures that facilitate passing through the lips of the first oil seal and the second oil seal.

[0087] Combination Figure 1 and Figure 6 The first guide column includes a first positioning column 3022 and a first profile matching portion 3023. The two axial ends of the first positioning column 3022 are respectively connected to the first leak test head 302 and the first profile matching portion 3023, and the outer diameter of the first positioning column 3022 is larger than the outer diameter of the first profile matching portion 3023, and is used to match with the lip of the first oil seal. The first profile matching portion 3023 can be a polygonal column structure to facilitate positioning with the installation shaft. A chamfered structure is set at one end of the first positioning column 3022 close to the first profile matching portion 3023 to guide the process of passing through the first oil seal.

[0088] It has been found through experiments that the chamfered structure on the first positioning column 3022 needs to be set to a smooth rounded structure with a larger arc, which has better guiding properties. In the process of introducing the first guide column into the first oil seal lip, the wear on the first oil seal lip and the contact area of ​​the outer end face of the oil seal can be reduced to avoid oil leakage.

[0089] Furthermore, the first positioning column 3022 and the oil seal lip are in a small interference fit, so as to simulate the actual vehicle assembly method for airtight leak testing, so that the measurement data is closer to the actual vehicle.

[0090] The structure of the second guide column corresponds to that of the first guide column, including a second positioning column and a second profile fitting portion. The two axial ends of the second positioning column are respectively connected to the second leak test pressure head and the second profile fitting portion, and the outer diameter of the second positioning column is larger than the outer diameter of the second profile fitting portion, which is used for the lip fitting of the second oil seal. The end of the second positioning column close to the second profile fitting portion is a chamfered structure to guide the process of passing through the second oil seal.

[0091] In order to realize automatic feeding of the oil seal, an oil seal feeding mechanism 500 is also provided on the machine base 100. There may be two oil seal feeding mechanisms 500, which feed the movable pressing mechanism 210 and the fixed pressing mechanism 200 respectively, that is, feed the first pressing position and the second pressing position respectively.

[0092] In a specific embodiment disclosed in the utility model, the oil seal feeding mechanism 500 includes a first feeding body 510, a second feeding body 520 and a discharge assembly, the first feeding body 510 is arranged on the machine base 100 and is provided with a first half groove, the second feeding body 520 is connected to the first feeding body 510 and is provided with a second half groove, the first half groove and the second half groove are opposite to each other and form a feeding groove for the oil seal to be inserted, and the feeding groove extends to the press-fitting position of the press-fitting mechanism, that is, to the first press-fitting position or the second press-fitting position. The discharge assembly is arranged on the first feeding body 510 or the second feeding body 520, and is used to control the sequential discharge of the oil seal.

[0093] Specifically, combined Figure 1 The oil seal feeding mechanism 500 is disposed above the movable pressing mechanism 210 and the fixed pressing mechanism 200, and can discharge materials to the first pressing position and the second pressing position under the action of gravity.

[0094] Preferably, the loading chute is arranged along the vertical direction to facilitate the spatial layout of various mechanisms on the machine base 100 and the loading of oil seals, and multiple oil seals can be stored in the loading chute in the extension direction, and the oil seals can be discharged in sequence by controlling the dropping of one oil seal each time.

[0095] Correspondingly, combined Figure 1 and Figure 4 The fixed press-fitting mechanism 200 is provided with a first press-fitting slot 205. When the first oil seal is dropped from the oil seal feeding mechanism 500, it is introduced to the first press-fitting position through the first press-fitting slot 205. The first press-fitting slot 205 can be a channel structure surrounded by four side panels and connected from top to bottom. The mobile press-fitting mechanism 210 is provided with a second press-fitting slot. The second oil seal can be introduced to the second press-fitting position through the second press-fitting slot.

[0096] The control of the oil seal discharge timing is achieved by setting the discharge component. Specifically, Figure 7The discharging assembly includes two control cylinders, and the two control cylinders are arranged on the first feeding body 510 or the second feeding body 520. The one of the two control cylinders closer to the discharging end is defined as the first cylinder 530, and the other is defined as the second cylinder 531. When the cylinder rods of the first cylinder 530 and the second cylinder 531 are both extended, the two oil seals at the bottom that are close to each other in the feeding trough can be limited in the feeding trough respectively without falling automatically. That is, the first cylinder 530 limits an oil seal to be discharged that is close to the discharging end, and the second cylinder 531 limits the remaining oil seals in the feeding trough that are subsequently discharged. When discharging, the cylinder rod of the first cylinder 530 is controlled to retract so that the corresponding oil seal to be discharged falls to realize the oil seal loading. Then, the cylinder rod of the first cylinder 530 is controlled to extend, and the cylinder rod of the second cylinder 531 is controlled to retract in sequence, so that an oil seal for subsequent discharge falls to the position limited by the cylinder rod of the first cylinder 530, and serves as a new oil seal to be discharged. At this time, the cylinder rod of the second cylinder 531 is controlled to extend to limit the remaining oil seals, thereby completing a feeding process of the oil seal feeding mechanism 500.

[0097] The oil seal feeding mechanism 500 can move together with the press-fitting mechanism or be fixedly disposed on the machine base 100 .

[0098] Combination Figure 1 In this embodiment, the oil seal feeding mechanism 500 is fixedly arranged on the machine base 100, and the press-fitting process and the leak testing process are transferred by moving the positions of the press-fitting mechanism and the leak testing mechanism on the machine base 100. When the press-fitting mechanism moves to the end of the shaft mounting mechanism 400, the first press-fitting position and the second press-fitting position are respectively located below an oil seal feeding mechanism 500 to realize feeding.

[0099] In order to accommodate the loading of oil seals of various sizes, the spacing between the first loading body 510 and the second loading body 520 is adjustable, so that the size of the loading trough can be controlled by changing the distance to accommodate different sizes of oil seals.

[0100] Specifically, the first loading body 510 can be fixedly set on the machine base 100, and the second loading body 520 can be fixed to the first loading body 510 or the machine base 100 through an adjusting screw. By controlling the rotation of the adjusting screw through the hand wheel 550, the second loading body 520 can be moved toward the first loading body 510 or away from the first loading body 510 to achieve distance adjustment.

[0101] The oil seal feeding mechanism 500 is specifically arranged on the machine base through the bracket assembly 540, so as to facilitate the adjustment of the installation position.

[0102] The following is a use process of the oil seal press-fitting device disclosed in the utility model:

[0103] S10, adjusting the distance between the first loading body 510 and the second loading body 520 according to the size of the oil seal, and sequentially loading the oil seal into the loading groove of the oil seal loading mechanism 500.

[0104] S20, manually hoist the front axle assembly onto the shaft mounting mechanism 400 through a hoist, position the front axle assembly through a locating pin, and manually press a start button to control three groups of cylinders to clamp the front axle assembly to ensure that the axle assembly is securely fixed.

[0105] S30, the two oil seal feeding mechanisms 500 both control the first cylinder 530 to retract, so as to feed the oil seals to the first press-fitting position and the second press-fitting position.

[0106] S40, the mobile press-fitting mechanism 210 moves toward the fixed press-fitting mechanism 200 until the first oil seal and the second oil seal are press-fitted to both ends of the front axle assembly.

[0107] S50, the moving press-fitting mechanism 210 is withdrawn along the first guide rail, the pressing on the front axle assembly is released, and the leak testing mechanism moves to both ends of the front axle assembly.

[0108] S60, the first leakage test component 300 pushes the shaft installation mechanism 400 toward the direction of the second leakage test component 310, and performs a leakage test on the installation shaft after positioning.

[0109] S60, after the leak test is completed, the shaft installation mechanism 400 releases the positioning of the installation shaft, and the installation shaft is manually lifted off the production line.

[0110] The oil seal pressing device disclosed in the embodiment of the utility model realizes automatic completion of the oil seal pressing and leak testing process, reduces the turnover of parts, realizes the automation of equipment, reduces labor costs, improves efficiency, and solves the process difficulties of oil leakage and inadequate pressing caused by easy damage to the oil seal pressing lip, and improves the process method of front axle assembly leak testing by simulating the assembly relationship of the whole vehicle.

[0111] The above description of the disclosed embodiments enables professionals and technicians in the field to implement or use the utility model. Various modifications to these embodiments will be obvious to professionals and technicians in the field, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. The specific technical means in some embodiments can be combined in part or in whole into another embodiment without being explicitly excluded by another embodiment. Therefore, the utility model will not be limited to the embodiments shown in this article, but will conform to the widest range consistent with the principles and novel features disclosed herein.

Claims

1. An oil seal press-fitting device, used for press-fitting a first oil seal and a second oil seal to both ends of a mounting shaft, characterized in that: include: A machine base (100); A fixed press-fitting mechanism (200) is arranged on the machine base (100) and is provided with a first press-fitting position for installing the first oil seal; A movable press-fitting mechanism (210) is movably disposed on the machine base (100) and is provided with a second press-fitting position for installing the second oil seal, and the second press-fitting position is opposite to the first press-fitting position; The shaft installation mechanism (400) is slidably disposed on the machine base (100) and is located between the fixed pressing mechanism (200) and the movable pressing mechanism (210), and is used to fix the installation shaft. The movable pressing mechanism (210) is used to push the shaft installation mechanism (400) in the direction of the fixed pressing mechanism (200), so that the first oil seal and the second oil seal are pressed tightly on both ends of the installation shaft.

2. The oil seal press-fitting device according to claim 1, characterized in that: The fixed pressing mechanism (200) comprises a fixed seat (201) and a fixed pressing plate (202), wherein the fixed seat (201) is arranged on the machine base (100), the fixed pressing plate (202) is connected to the fixed seat (201) via a first elastic member (203), and the first pressing position is formed on a side of the fixed pressing plate (202) facing away from the fixed seat (201); and / or, The movable pressing mechanism (210) comprises a movable seat and a movable pressing plate, wherein the movable seat is movably arranged on the machine base (100), the movable pressing plate is connected to the movable seat via a second elastic member, and the second pressing position is formed on a side of the movable pressing plate facing away from the movable seat.

3. The oil seal press-fitting device according to claim 2, characterized in that: A first limiting portion is provided on one of the fixing seat (201) and the fixing pressure plate (202), and the first limiting portion is used to abut against the other of the fixing seat (201) and the fixing pressure plate (202) to limit the limit state of compression of the first elastic member (203); and / or, A second limiting portion is provided on one of the movable seat and the movable pressing plate, and the second limiting portion is used to abut against the other of the movable seat and the movable pressing plate to limit the limit state of compression of the second elastic member.

4. The oil seal press-fitting device according to any one of claims 1 to 3, characterized in that: A pressing station is formed between the fixed pressing mechanism (200) and the movable pressing mechanism (210); The machine base (100) is provided with a leak testing mechanism, the leak testing mechanism comprising a first leak testing component (300) and a second leak testing component (310) respectively used to cooperate with the first oil seal and the second oil seal, and a leak testing station is formed between the first leak testing component (300) and the second leak testing component (310); In the first state, the shaft installation mechanism (400) is located at the press-fitting station, and in the second state, the shaft installation mechanism (400) is located at the leak testing station.

5. The oil seal press-fitting device according to claim 4, characterized in that: The machine base (100) is provided with a first guide rail (110), the first guide rail (110) extends to the fixed pressing mechanism (200), a first slide seat and a second slide seat are slidably provided on the first guide rail (110), the shaft mounting mechanism (400) is provided on the first slide seat, and the movable pressing mechanism (210) is provided on the second slide seat.

6. The oil seal press-fitting device according to claim 5, characterized in that: The machine base (100) is provided with a second guide rail, a third slide seat is slidably provided on the second guide rail, and the fixed press-fitting mechanism (200) and the first leakage test component (300) are arranged on the third slide seat; A third guide rail is arranged on the second slide seat, and the extension directions of the third guide rail and the second guide rail both have an angle with the extension direction of the first guide rail. A fourth slide seat is slidably arranged on the third guide rail, and the movable pressing mechanism (210) and the second leakage test component (310) are arranged on the fourth slide seat.

7. The oil seal press-fitting device according to claim 6, characterized in that: The first leakage test assembly (300) comprises a first leakage test pressure head (302), the first end of the first leakage test pressure head (302) is arranged on the third slide seat, and the second end is provided with a first guide column and a first fitting portion, the first guide column is used to pass through the first oil seal, the first fitting portion is used to position and cooperate with the end of the mounting shaft, and the first fitting portion is provided with a first leakage hole (3021); and / or, The second leakage test component (310) includes a second leakage test pressure head, the first end of the second leakage test pressure head is arranged on the fourth slide seat, and the second end is provided with a second guide column and a second fitting portion, the second guide column is used to pass through the second oil seal, the second fitting portion is used to position and cooperate with the end of the mounting shaft, and the second fitting portion is provided with a second leakage hole.

8. The oil seal press-fitting device according to claim 7, characterized in that: The first guide column comprises a first positioning column (3022) and a first profile matching portion (3023), two ends of the first positioning column (3022) are respectively connected to the first leak test head (302) and the first profile matching portion (3023), and the outer diameter of the first positioning column (3022) is greater than the outer diameter of the first profile matching portion (3023), and is used to match with the lip of the first oil seal, and one end of the first positioning column (3022) close to the first profile matching portion (3023) is a chamfered structure; and / or, The second guide column includes a second positioning column and a second profile fitting portion, the two ends of the second positioning column are respectively connected to the second leak test head and the second profile fitting portion, and the outer diameter of the second positioning column is larger than the outer diameter of the second profile fitting portion, and is used to cooperate with the lip of the second oil seal, and one end of the second positioning column close to the second profile fitting portion is a chamfered structure.

9. The oil seal press-fitting device according to any one of claims 1 to 3, characterized in that: An oil seal feeding mechanism (500) is provided on the machine base (100), and the oil seal feeding mechanism (500) is used to transport the oil seal to the pressing mechanism, the pressing mechanism comprises the fixed pressing mechanism (200) and / or the movable pressing mechanism (210), the oil seal comprises the first oil seal and / or the second oil seal, and the oil seal feeding mechanism (500) comprises: A first loading body (510) is disposed on the machine base (100) and is provided with a first half groove; A second loading body (520) is connected to the first loading body (510) and is provided with a second half groove, wherein the first half groove and the second half groove are opposite to each other and form a loading groove for the oil seal to be inserted, and the loading groove extends to the pressing position of the pressing mechanism, the pressing position of the fixed pressing mechanism (200) is the first pressing position, and the pressing position of the movable pressing mechanism (210) is the second pressing position; A discharge assembly is arranged on the first loading body (510) or the second loading body (520) and is used to control the discharge of the oil seal.

10. The oil seal press-fitting device according to claim 9, characterized in that: The spacing distance between the first loading body (510) and the second loading body (520) is adjustable.

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