Automatic press-fit device for crankshaft oil seal

Abstract

The invention discloses an automatic press-fit device for crankshaft oil seal, comprising: a machine base, a press-fit mechanism, a guide mechanism and a rotating mechanism, wherein the press-fit mechanism is provided with a press-fit sleeve for supporting the oil seal, the press-fit mechanism is provided on the guide mechanism, the guide mechanism is connected with the rotating mechanism, the rotating mechanism is rotatably provided on the machine base, the guide mechanism can rotate relative to the machine base under the action of the rotating mechanism, so that the guide mechanism has a first position and a second position; when located at the first position, the oil seal can be installed on the support, when located at the second position, the end face of the press-fit sleeve supporting the oil seal is opposite to the crankshaft, and the end face of the oil seal away from the press-fit sleeve is perpendicular to the axis of the crankshaft, the guide mechanism can drive the press-fit sleeve to move along the first direction, and the first direction is perpendicular to the end face of the oil seal. The device can switch between the first position and the second position, and pre-install the oil seal in the first position, and press-fit the oil seal onto the crankshaft in the second position, and the whole process is simple to operate and does not require manual assistance.

Description

Technical Field

[0001] The invention relates to the technical field of engine assembly, in particular to an automatic press-fitting device for a crankshaft oil seal. Background Art

[0002] The engine crankshaft oil seal is an important component for sealing the gap between the cylinder block and the crankshaft. If the installation position is not in place or the force is uneven during the installation process, the oil seal will be poorly installed, resulting in oil leakage. The oil seal was originally installed by hammering it into the crankshaft at equal intervals along the circumference of the oil seal, but this method is difficult to control the force, resulting in uneven force on the oil seal and difficulty in ensuring the quality of press-fitting. In order to overcome the problems of low efficiency and uneven force, the industry currently generally uses a dedicated mechanical press-fitting device to install the oil seal. It mainly sets the crankshaft sleeve on the press-fitting device, then aligns it with the crankshaft, and uses the press-fitting parts in the press-fitting device to push the oil seal, so that the oil seal can be stably transitioned and fastened to the crankshaft. However, this process still requires manual movement and operation of the press-fitting device, and the coaxiality of the press-fitting device and the crankshaft must be calibrated at all times during the press-fitting process. This process not only requires manual cooperation, but may also result in poor alignment accuracy and poor press-fitting results. Summary of the invention

[0003] Based on this, it is necessary to provide an automatic press-fitting device for crankshaft oil seal to address the above problem. The press-fitting device can automatically align the crankshaft during use without manual operation.

[0004] A crankshaft oil seal automatic press-fitting device comprises: a machine base, a press-fitting mechanism, a guide mechanism and a rotating mechanism, the press-fitting mechanism is provided with a press-fitting sleeve for supporting the oil seal, the press-fitting mechanism is arranged on the guide mechanism, the guide mechanism is connected to the rotating mechanism, the rotating mechanism is rotatably arranged on the machine base, the guide mechanism can rotate relative to the machine base under the action of the rotating mechanism, so that the guide mechanism switches between a first position and a second position; when the guide mechanism is located at the first position, the oil seal can be installed on the press-fitting sleeve, when the guide mechanism is located at the second position, the end face of the press-fitting sleeve supporting the oil seal is opposite to the crankshaft, and the end face of the oil seal facing away from the press-fitting sleeve is perpendicular to the axis of the crankshaft, the guide mechanism can drive the press-fitting sleeve to move along a first direction, and the first direction is perpendicular to the end face of the oil seal.

[0005] In the above-mentioned automatic press-fitting device for crankshaft oil seal, since the press-fitting mechanism is arranged on the guide mechanism, the guide mechanism is arranged on the rotating mechanism, and the rotating mechanism is rotatably arranged on the machine base, the guide mechanism can rotate relative to the machine base under the rotation of the rotating mechanism, so that the guide mechanism has a first position and a second position. Since the guide mechanism is provided with a press-fitting sleeve for supporting the oil seal, when the automatic press-fitting device for crankshaft oil seal is used, the guide mechanism is first placed in the first position, and the oil seal is pre-installed on the press-fitting sleeve, and then the guide mechanism is automatically driven to switch to the second position by the rotating mechanism, so that the end face of the press-fitting sleeve supporting the oil seal is opposite to the crankshaft, and the end face of the oil seal facing away from the press-fitting sleeve is perpendicular to the axis of the crankshaft. Since the guide mechanism can drive the press-fitting sleeve to move along a first direction, wherein the first direction is perpendicular to the end face of the oil seal, the press-fitting mechanism abuts against the crankshaft under the driving action of the guide mechanism, and the press-fitting sleeve can push the oil seal to move along the first direction onto the crankshaft to complete the installation of the crankshaft oil seal.

[0006] The technical solution is further described below:

[0007] In one embodiment, the rotating mechanism includes a rotating part, which includes a fixed seat, a mounting seat and a bearing. The fixed seat and the mounting seat are both cylindrical structures. The fixed seat is installed on the machine base. The mounting seat is rotatably arranged in the fixed seat. The guide mechanism is arranged on the mounting seat, and the bearing is clamped between the fixed seat and the mounting seat.

[0008] In one embodiment, the rotating mechanism also includes a first driving member, and the rotating part also includes a support plate, wherein the support plate is arranged on the mounting seat, and the support plate is provided with a pushing rod, wherein the central axis of the pushing rod is parallel to the central axis of the mounting seat, and the pushing rod is staggered relative to the central axis of the mounting seat, and the first driving member includes a telescopic driver and a telescopic rod connected to the telescopic driver, wherein the telescopic driver is hinged to the base, and one end of the telescopic rod away from the telescopic driver is connected to the pushing rod, and the telescopic direction of the telescopic rod is perpendicular to the central axis of the mounting seat.

[0009] In one embodiment, the press-fitting mechanism also includes a support member and an elastic member, the support member is a cylindrical structure, and the oil seal can be sleeved on one end of the support member, a accommodating cavity is provided in the press-fitting sleeve, the accommodating cavity is a cylindrical hole cavity, and the accommodating cavity is provided with an outlet along the second direction, the elastic member is arranged in the accommodating cavity, and the expansion and contraction direction of the elastic member is parallel to the second direction, one end of the support member on which the oil seal is sleeved is located outside the accommodating cavity, and the support member can be inserted into the accommodating cavity through the outlet of the accommodating cavity and slidably cooperate with the press-fitting sleeve, one end of the support member away from the oil seal is connected to one end of the elastic member, one end of the elastic member away from the support member is connected to one end of the press-fitting sleeve away from the outlet, and one end of the press-fitting sleeve away from the outlet is connected to the guide mechanism, when the guide mechanism is located at the first position, the first direction intersects with the second direction, and when the guide mechanism is located at the second position, the first direction is parallel to the second direction.

[0010] In one embodiment, the press-fitting mechanism also includes a spring guide sleeve in a cylindrical structure, and the spring guide sleeve is slidably arranged in the accommodating cavity along the second direction. The elastic member includes a spring, and a accommodating cavity with an open end is provided in the spring guide sleeve. One end of the spring is inserted into the accommodating cavity and abuts against the spring guide sleeve, and the other end of the spring abuts against an end of the press-fitting sleeve away from the outlet, and the support member is connected to the spring guide sleeve.

[0011] In one of the embodiments, the aperture of the accommodating cavity gradually increases along the compression direction of the spring, and the outer diameter of the spring guide sleeve gradually increases, and the elastic member has a compression state and a reset state in the accommodating cavity; when the elastic member is in the reset state, the outer circumferential surface of the spring guide sleeve is tightly attached to the inner circumferential surface of the accommodating cavity, and the spring guide sleeve and the guide mechanism are spaced apart along the second direction; when the elastic member is in the compression state, the support member is located in the accommodating cavity.

[0012] In one embodiment, the accommodating cavity includes a first hole segment and a second hole segment connected in the second direction, the aperture of the first hole segment is larger than the diameter of the second hole segment, and the diameter of the second hole segment gradually increases along the compression direction, the spring guide sleeve is slidably arranged in the first hole segment and the second hole segment, and a first step is provided at the intersection of the inner circumference of the first hole segment and the inner circumference of the second hole segment, a section with an opening on the spring guide sleeve is abutting section, and a flange is provided on the outer circumference of the abutting section, and the flange is limited in the first hole segment, when the elastic member is in a reset state, one end of the support member on which the oil seal is installed is protruded outside the second hole segment, the outer circumference of the spring guide sleeve is tightly attached to the inner circumference of the second hole segment, and the flange abuts on the first step.

[0013] In one embodiment, the accommodating cavity also includes a third hole segment, the third hole segment is connected to the second hole segment, and the third hole segment is located on the side of the second hole segment away from the first hole segment, the aperture of the third hole segment is larger than the aperture of the second hole segment, the opening of the third hole segment away from the second hole segment is the outlet, and a second step is provided at the intersection of the inner circumference of the third hole segment and the inner circumference of the second hole segment; when the elastic member is in the reset state, the end of the support member on which the oil seal is installed is located outside the third hole segment, and the end of the support member away from the oil seal is spaced apart from the first step along the second direction; when the elastic member is in the compression state, the support member is located in the third hole segment.

[0014] In one of the embodiments, the accommodating cavity further has an inlet in the second direction, and the inlet and the outlet are respectively located at opposite ends of the accommodating cavity along the second direction, a support rod is provided on a side of the guide mechanism facing the inlet, an end of the spring facing away from the spring guide sleeve is wound around the support rod and abuts against the guide mechanism, and when the elastic member is in the reset state, a partial section of the support rod is inserted into the accommodating cavity.

[0015] In one embodiment, the guide mechanism includes a guide rod assembly, a second driving member, a mounting plate and a connecting plate arranged at intervals along the second direction, the guide rod assembly includes a driving rod and a guide rod, a plurality of guide rods are provided, and the guiding directions of the plurality of guide rods are parallel to the second direction, the mounting plate is connected to the second driving member, the second driving member is arranged on the rotating mechanism, a positioning hole is provided in the middle of the mounting plate, and a plurality of guide holes are provided at intervals on the mounting plate in the circumferential direction around the positioning hole, the driving rod passes through the positioning hole so that one end of the driving rod is connected to the second driving member, and the other end of the driving rod is connected to the connecting plate, the plurality of guide rods correspond one-to-one to the plurality of guide holes, and the guide rod passes through the guide hole and is connected to the connecting plate.

[0016] In one of the embodiments, the automatic press-fitting device for the crankshaft oil seal also includes a clamp, a handle is provided at one end of the clamp, a positioning rod is provided at the end of the clamp away from the handle, the outer peripheral surface of the clamp is a cylindrical surface, and the diameter of the cylindrical surface gradually increases toward the positioning rod, the end of the support member on which the oil seal is mounted is provided with a groove that is compatible with the positioning rod, and the clamp is detachably arranged on the support member. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the various elements are drawn only as examples in the drawings and are not necessarily drawn according to the true scale.

[0020] Figure 1 It is a structural schematic diagram of the crankshaft oil seal automatic press-fitting device in one embodiment of the present invention when it is in the first position;

[0021] Figure 2 It is a structural schematic diagram of the crankshaft oil seal automatic press-fitting device in one embodiment of the present invention when it is in the second position;

[0022] Figure 3 It is a structural schematic diagram of another perspective when the automatic press-fitting device for crankshaft oil seal in one embodiment of the present invention is in the second position;

[0023] Figure 4 It is a structural schematic diagram of another viewing angle when the automatic press-fitting device for crankshaft oil seal in one embodiment of the present invention is in the second position;

[0024] Figure 5 for Figure 2 Sectional view of the AA surface in the automatic press-fit device for the crankshaft oil seal;

[0025] Figure 6 for Figure 5 Enlarged schematic diagram of the structure of the middle circle B.

[0026] The components in the figure are marked as follows:

[0027] 10. Automatic press-fit device for crankshaft oil seal; 110. Machine base; 120. Press-fit mechanism; 121. Press-fit sleeve; 1211. First hole section; 1212. Second hole section; 1213. First step; 1214. Third hole section; 1215. Second step; 122. Support member; 1221. Groove; 123. Elastic member; 124. Spring guide sleeve; 1241. Flange; 130. Guide mechanism; 131. Support rod; 132. Guide rod assembly; 1321. Driving rod; 1322, guide rod; 133, second driving member; 134, mounting plate; 135, connecting plate; 136, connecting block; 140, rotating mechanism; 141, rotating part; 1411, fixing seat; 1412, mounting seat; 1413, bearing; 1414, supporting plate; 1415, pushing rod; 142, first driving member; 1421, telescopic driver; 1422, telescopic rod; 150, clamp; 151, handle; 152, positioning rod. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0029] See also Figures 1 to 5An embodiment of the present application provides an automatic press-fit device 10 for a crankshaft oil seal, comprising: a machine base 110, a press-fit mechanism 120, a guide mechanism 130, and a rotating mechanism 140. The press-fit mechanism 120 is provided with a press-fit sleeve 121 for supporting the oil seal, the press-fit mechanism 120 is arranged on the guide mechanism 130, the guide mechanism 130 is connected to the rotating mechanism 140, the rotating mechanism 140 is rotatably arranged on the machine base 110, and the guide mechanism 130 can rotate relative to the machine base 110 under the action of the rotating mechanism 140, so that the guide mechanism 130 switches between a first position and a second position. When the guide mechanism 130 is in the first position, the oil seal can be installed on the press-fit sleeve 121. When the guide mechanism 130 is in the second position, the end face of the press-fit sleeve 121 supporting the oil seal is opposite to the crankshaft, and the end face of the oil seal facing away from the press-fit sleeve 121 is perpendicular to the axis of the crankshaft. The guide mechanism 130 can drive the press sleeve 121 to move along a first direction, and the first direction is perpendicular to the end surface of the oil seal.

[0030] In the above-mentioned crankshaft oil seal automatic press-fitting device 10, since the press-fitting mechanism 120 is arranged on the guide mechanism 130, the guide mechanism 130 is arranged on the rotating mechanism 140, and the rotating mechanism 140 is rotatably arranged on the machine base 110, the guide mechanism 130 can rotate relative to the machine base 110 under the rotation of the rotating mechanism 140, so that the guide mechanism 130 has a first position and a second position. Since the guide mechanism 130 is provided with a press-fitting sleeve 121 for supporting the oil seal, when the crankshaft oil seal automatic press-fitting device 10 is used, the guide mechanism 130 is first placed in the first position, and the oil seal is pre-installed on the press-fitting sleeve 121, and then the guide mechanism 130 is automatically driven to switch to the second position by the rotating mechanism 140, so that the end face of the press-fitting sleeve 121 supporting the oil seal is opposite to the crankshaft, and the end face of the oil seal facing away from the press-fitting sleeve 121 is perpendicular to the axis of the crankshaft. Since the guide mechanism 130 can drive the press-fitting sleeve 121 to move along the first direction, wherein the first direction is perpendicular to the end face of the oil seal, the press-fitting mechanism 120 is driven to abut against the crankshaft by the guide mechanism 130, and the press-fitting sleeve 121 can push the oil seal to move along the first direction onto the crankshaft to complete the installation of the crankshaft oil seal.

[0031] In order to facilitate a clear understanding of the setting direction of the first direction in this embodiment, Figure 2 For example, the first direction is Figure 2 Medium S 1 The direction indicated.

[0032] See also Figure 2 , Figure 3 and Figure 5On the basis of the above embodiments, in one embodiment, the rotating mechanism 140 includes a rotating part 141, and the rotating part 141 includes a fixed seat 1411, a mounting seat 1412 and a bearing 1413. The fixed seat 1411 and the mounting seat 1412 are both cylindrical structures, the fixed seat 1411 is installed on the machine base 110, and the mounting seat 1412 is rotatably arranged in the fixed seat 1411. The guide mechanism 130 is arranged on the mounting seat 1412, and the bearing 1413 is clamped between the fixed seat 1411 and the mounting seat 1412. In this way, when the machine base 110 remains stationary, the guide mechanism 130 located on the mounting seat 1412 can rotate around the central axis of the mounting seat 1412 to meet the first position and the second position of the guide mechanism 130.

[0033] See also Figures 1 to 5 Further, in one embodiment, the rotating mechanism 140 further includes a first driving member 142. The rotating part 141 further includes a supporting plate 1414. The supporting plate 1414 is disposed on the mounting seat 1412, and the supporting plate 1414 is provided with a pushing rod 1415. The central axis of the pushing rod 1415 is parallel to the central axis of the mounting seat 1412, and the pushing rod 1415 is arranged offset from the mounting seat 1412 relative to the central axis of the mounting seat 1412. The first driving member 142 includes a telescopic driver 1421 and a telescopic rod 1422 connected to the telescopic driver 1421, the telescopic driver 1421 is hinged to the base 110, and one end of the telescopic rod 1422 away from the telescopic driver 1421 is connected to the pushing rod 1415. The telescopic direction of the telescopic rod 1422 is perpendicular to the central axis of the mounting seat 1412. Specifically, the axis of the telescopic rod 1422 is perpendicular to the central axis of the mounting seat 1412. In this way, the first driving member 142 can drive the push rod 1415 to rotate around the central axis of the mounting seat 1412, so that the mounting seat 1412 rotates along its own axis, and then drives the guide mechanism 130 and the pressing mechanism 120 to rotate around the mounting seat 1412.

[0034] Optionally, in another embodiment, the first driving member 142 includes a rotating shaft, and an output end of the rotating shaft is connected to the mounting seat 1412. In this way, the rotating shaft can drive the mounting seat 1412 to rotate around the central axis of the mounting seat 1412.

[0035] See also Figure 1 , Figure 2 and Figure 5On the basis of the above embodiment, in one embodiment, the press-fitting mechanism 120 further includes a support member 122 and an elastic member 123. The support member 122 is a cylindrical structure, and the oil seal can be sleeved on one end of the support member 122. The press-fitting sleeve 121 is provided with a receiving cavity, which is a cylindrical hole. The receiving cavity is provided with an outlet along the second direction, and the elastic member 123 is arranged in the receiving cavity, and the telescopic direction of the elastic member 123 is parallel to the second direction. One end of the support member 122 sleeved with the oil seal is located outside the receiving cavity, and the support member 122 can be inserted into the receiving cavity through the opening of the receiving cavity, and slides with the press-fitting sleeve 121. One end of the support member 122 away from the oil seal is connected to one end of the elastic member 123, and one end of the elastic member 123 away from the support member 122 is connected to one end of the press-fitting sleeve 121 away from the outlet, and the end of the press-fitting sleeve 121 away from the outlet is connected to the guide mechanism 130. When the guide mechanism 130 is located at the first position, the first direction intersects with the second direction, and when the guide mechanism 130 is located at the second position, the first direction is parallel to the second direction.

[0036] Since the gap between the press-fitting mechanism 120 and the crankshaft is small in the second position, it is not conducive to installing the oil seal on the support member 122, so the guide mechanism 130 needs to be switched to the first position first. In the first position, the operating space is large, which is convenient for setting the oil seal sleeve on the support member 122. Specifically, in this embodiment, one end of the support member 122 is inserted into the accommodating cavity from the outlet of the accommodating cavity and connected to the elastic member 123, and the oil seal sleeve is mounted on the other end of the support member 122, and the end of the support member 122 with the oil seal sleeve is located outside the accommodating cavity, so that the end face of the oil seal facing the press-fitting sleeve 121 is in contact with the end face of the press-fitting sleeve 121 with the outlet. When the guide mechanism 130 is in the second position, the end face of the press-fitting sleeve 121 that is in contact with the oil seal is opposite to the crankshaft, and the end face of the oil seal that is away from the press-fitting sleeve 121 is perpendicular to the circumferential direction of the crankshaft, or the end face of the oil seal that is away from the press-fitting sleeve 121 is parallel to the end face of the crankshaft facing the oil seal.

[0037] like Figures 2 to 5As shown, during the process of press-fitting the oil seal, the guide mechanism 130 drives the press-fitting sleeve 121, the elastic member 123 and the support member 122 to move to the left to approach the crankshaft. When the end face of the support member 122 at one end of which the oil seal is installed abuts and squeezes the end face of the crankshaft facing the crankshaft oil seal automatic press-fitting device 10, the crankshaft provides a reverse force to the support member 122, that is, the end face of the crankshaft will generate a leftward thrust on the end face of the support member 122. At this time, since the guide mechanism 130 will drive the press-fitting sleeve 121 and the elastic member 123 to continue to move to the left, and the support member 122 is stationary relative to the crankshaft after being abutted, the elastic member 123 is compressed, and the press-fitting sleeve 121 continues to move to the left. Since the oil seal sleeve is arranged on the support member 122, and the end face of the oil seal facing the press-fitting sleeve 121 is in contact with the end face of the press-fitting sleeve 121 with the outlet, when the support member 122 is abutted by the crankshaft and the press-fitting sleeve 121 continues to move to the left, the press-fitting sleeve 121 can push the oil seal from the support member 122 to the crankshaft until the oil seal is completely pushed to the designated position on the crankshaft. In this process, the elastic member 123 is squeezed and compressed, so that the support member 122 gradually enters the accommodating cavity and is finally completely accommodated in the accommodating cavity. After the pushing is completed, the guide mechanism 130 drives the press-fitting sleeve 121 and the elastic member 123 to move to the right until the support member 122 is separated from the crankshaft.

[0038] In order to facilitate a clear understanding of the setting direction of the second direction in this embodiment, Figure 1 and Figure 2 For example, when the guide mechanism 130 is located at the first position, the second direction is Figure 1 Medium S 2 When the guide mechanism 130 is located at the second position, the second direction is Figure 2 Medium S 2 The direction indicated.

[0039] See also Figure 5 and Figure 6 In order to ensure that the elastic member 123 maintains a stable telescopic direction during the telescopic process, based on the above embodiment, in one embodiment, the press-fitting mechanism 120 further includes a spring guide sleeve 124 in a cylindrical structure, the spring guide sleeve 124 is slidably arranged in the accommodating cavity along the second direction, the elastic member 123 includes a spring, and the spring guide sleeve 124 is provided with an accommodating cavity with an open end, one end of the spring is inserted into the accommodating cavity and abuts against the spring guide sleeve 124, the other end of the spring abuts against the end of the press-fitting sleeve 121 away from the outlet, and the support member 122 is connected to the spring guide sleeve 124. In this way, the spring guide sleeve 124 is sleeved outside the spring, so that the spring can maintain a consistent telescopic direction during the telescopic movement, thereby improving the coaxiality of the press-fitting sleeve 121 and the support member 122.

[0040] Based on the above embodiment, in one embodiment, the aperture of the accommodating cavity gradually increases along the compression direction of the spring, and the outer diameter of the spring guide sleeve 124 gradually increases. The elastic member 123 has a compressed state and a reset state in the accommodating cavity.

[0041] It should be noted that, in this embodiment, the reset state refers to the state in which the spring is in a natural state without any deformation. The compressed state refers to the end of the spring connected to the support member 122 being subjected to a pressure moving toward the guide mechanism 130, so that the length of the spring is shortened, and the pressure moving toward the guide mechanism 130 is parallel to the second direction.

[0042] Specifically, in this embodiment, the oil seal has two end faces arranged opposite to each other. When the guide mechanism 130 is in the second position, the oil seal sleeve is arranged at one end of the support member 122, and the end of the support member 122 away from the oil seal is inserted into the accommodating cavity from the outlet and connected to the spring guide sleeve 124. At this time, one end face of the oil seal faces the press-fitting sleeve 121, and the other end face is opposite to and parallel to the end face of the crankshaft. When the elastic member 123 is in the reset state, the end of the support member 122 on which the oil seal is installed is located outside the accommodating cavity, and the end face of the oil seal facing the press-fitting sleeve 121 is in contact with the end face of the press-fitting sleeve 121 with the outlet. At this time, the outer peripheral surface of the spring guide sleeve 124 is tightly attached to the inner peripheral surface of the accommodating cavity, and the spring guide sleeve 124 and the guide mechanism 130 are spaced apart in the second direction. As the aperture of the accommodating cavity gradually increases along the compression direction of the spring, the outer diameter of the spring guide sleeve 124 gradually increases. In other words, on the press-fit sleeve 121, the aperture of the accommodating cavity gradually increases in the direction of the guide mechanism 130, and the outer diameter of the spring guide sleeve 124 gradually increases synchronously. Therefore, when the elastic member 123 is in the reset state, the outer circumference of the spring guide sleeve 124 is completely in contact with the inner circumference of the accommodating cavity, and the coaxiality of the spring guide sleeve 124 and the press-fit sleeve 121 is better. In this way, the spring guide sleeve 124 can avoid the gap between the spring guide sleeve 124 and the press-fit sleeve 121 causing the support member 122 to sag in the reset state, deviate from the center line of the crankshaft, and affect the coaxiality between the support seat, the oil seal and the crankshaft.

[0043] When the elastic member 123 is in a compressed state, the support member 122 is located in the accommodating cavity, and the end face of the press-fitting sleeve 121 that fits with the oil seal has pushed the oil seal from the support member 122 to the crankshaft. At this time, the gap between the inner circumference of the accommodating cavity and the outer circumference of the spring guide sleeve 124 gradually increases along the compression direction. Since the support member 122 and the spring guide sleeve 124 are both in clearance fit with the press-fitting sleeve 121, when the support member 122 is located in the accommodating cavity, the coaxiality of the support member 122 and the press-fitting sleeve 121 may be slightly offset. In this way, when the support member 122 contacts the crankshaft, the end face of the support member 122 cannot be completely fitted with the end face of the crankshaft. Therefore, when the press-fitting sleeve 121 pushes the oil seal onto the crankshaft, the oil seal may be offset, and then the quality of the oil seal installation cannot be guaranteed. It is precisely because the aperture of the accommodating cavity gradually increases along the compression direction of the spring, and the outer diameter of the spring guide sleeve 124 gradually increases, when the spring switches from the reset state to the compression state, the gap between the inner circumference of the accommodating cavity and the outer circumference of the spring guide sleeve 124 gradually increases along the compression direction, so that a certain amount of activity space is left in the accommodating cavity, and the spring guide sleeve 124 can slightly shake in the accommodating cavity. During the press-fitting process, the support 122 abuts against the crankshaft. When the end face of the end of the support 122 with the oil seal is not completely in contact with the end face of the crankshaft, the spring guide sleeve 124 may slightly shake during the extrusion process of the spring, thereby driving the support 122 to also slightly shake. In this way, when the support 122 contacts the crankshaft, the shaking of the support 122 can make the end face of the end of the support 122 with the oil seal completely in contact with the end face of the crankshaft, ensuring the coaxiality of the support 122 and the oil seal.

[0044] Please continue reading Figure 5 and Figure 6Further, in one embodiment, the accommodating cavity includes a first hole section 1211 and a second hole section 1212 connected in the second direction. The aperture of the first hole section 1211 is larger than the diameter of the second hole section 1212, and the diameter of the second hole section 1212 gradually increases along the compression direction. The spring guide sleeve 124 is slidably arranged in the first hole section 1211 and the second hole section 1212. A first step 1213 is provided at the intersection of the inner circumference of the first hole section 1211 and the inner circumference of the second hole section 1212. A section with an opening on the spring guide sleeve 124 is abutting section, and a flange 1241 is provided on the outer circumference of the abutting section, and the flange 1241 is limited in the first hole section 1211. When the elastic member 123 is in the reset state, the end of the support member 122 on which the oil seal is mounted is convexly disposed outside the second hole section 1212, the outer circumference of the spring guide sleeve 124 is closely attached to the inner circumference of the second hole section 1212, and the flange 1241 abuts against the first step 1213. The flange 1241 is restricted in the first hole section 1211, thus indirectly restricting the movement range of the spring guide sleeve 124 and the support member 122, so that the end of the support member 122 on which the oil seal is mounted is located outside the accommodating cavity, and the end of the support member 122 away from the oil seal is located inside the accommodating cavity.

[0045] Please continue reading Figure 5 and Figure 6 , further, in this embodiment, the accommodating cavity also includes a third hole section 1214. The third hole section 1214 is connected to the second hole section 1212, and the third hole section 1214 is located on the side of the second hole section 1212 away from the first hole section 1211. The aperture of the third hole section 1214 is larger than the aperture of the second hole section 1212, and the opening of the third hole section 1214 away from the second hole section 1212 is an outlet. A second step 1215 is provided at the intersection of the inner circumference of the third hole section 1214 and the inner circumference of the second hole section 1212. When the elastic member 123 is in the reset state, the end of the support member 122 on which the oil seal is installed is located outside the third hole section 1214, and the end of the support member 122 away from the oil seal is spaced from the first step 1213 along the second direction. When the elastic member 123 is in the compressed state, the support member 122 is located inside the third hole section 1214.

[0046] Since the diameter of the accommodating chamber and the spring guide sleeve 124 gradually increases along the compression direction of the spring, in order to place the spring guide sleeve 124 into the accommodating chamber, based on the above embodiment, in one embodiment, the accommodating chamber also has an inlet in the second direction, and the inlet and the outlet are respectively located at opposite ends of the accommodating chamber along the second direction. In this way, the spring guide sleeve 124 can be placed into the accommodating chamber from the inlet. At the same time, a support rod 131 is provided on the side of the guide mechanism 130 facing the inlet. The end of the spring facing away from the spring guide sleeve 124 is wound around the support rod 131 and abuts against the guide mechanism 130. When the elastic member 123 is in the reset state, a part of the rod section of the support rod 131 is inserted into the accommodating chamber. In this way, the spring can be extended and retracted along the axial direction of the support rod 131 during the extension and retraction process, so as to avoid the spring twisting and deflection during the compression process, which causes the end face of the support member 122 to be unable to completely fit with the crankshaft, thereby affecting the press-fitting quality of the oil seal.

[0047] See also Figures 1 to 4 In order to improve the stability of the guiding process of the guiding mechanism 130 and avoid deviation, based on the above embodiment, in one embodiment, the guiding mechanism 130 includes a guide rod assembly 132, a second driving member 133, a mounting plate 134 and a connecting plate 135 arranged at intervals along the second direction. The guide rod assembly 132 includes a driving rod 1321 and a guiding rod 1322. There are multiple guiding rods 1322, and the guiding directions of the multiple guiding rods 1322 are parallel to the second direction. The mounting plate 134 is connected to the second driving member 133, and the second driving member 133 is arranged on the rotating mechanism 140. A positioning hole is provided in the middle of the mounting plate 134, and a plurality of guiding holes are arranged at intervals on the mounting plate 134 in the circumferential direction around the positioning hole. The driving rod 1321 passes through the positioning hole so that one end of the driving rod 1321 is connected to the second driving member 133, and the other end of the driving rod 1321 is connected to the connecting plate 135. The plurality of guide rods 1322 correspond to the plurality of guide holes one by one, and the guide rods 1322 penetrate the guide holes and are connected to the connecting plate 135. In this way, the driving rod 1321 can move along the second direction and push the connecting plate 135 to move along the second direction. Since the press-fitting sleeve 121 is connected to the connecting plate 135, when the support seat abuts against the crankshaft, the press-fitting sleeve 121 is pushed by the entire connecting plate 135, and the force applied by the press-fitting sleeve 121 on the oil seal is more uniform. In this way, the force on the oil seal along its circumferential direction can be kept consistent, and the oil seal can be stably press-fitted onto the crankshaft to ensure the quality of the oil seal press-fitting.

[0048] See also Figure 1 and Figure 3 In order to prevent the guide rod 1322 from shaking during movement and affecting the stability of the moving direction of the driving rod 1321, further, a section of two adjacent guide rods 1322 away from the connecting plate 135 in the longitudinal direction is connected by a connecting block 136.

[0049] Specifically, Figure 5 and Figure 6 As shown, in this embodiment, a mounting groove is provided on the side of the connecting plate 135 away from the mounting plate 134. The end of the press-fit sleeve 121 with the inlet is installed in the mounting groove, and a support rod 131 is provided in the mounting groove. The end of the spring away from the spring guide sleeve 124 is wound around the support rod 131 and abuts against the connecting plate 135.

[0050] See also Figure 3 and Figure 4 Since the inner ring of the oil seal is made of rubber material, the oil seal will tilt when it is installed on the support member 122 due to uneven force when it contacts the support member 122. In order to improve the stability of the oil seal during pre-installation, based on the above embodiment, in one embodiment, the crankshaft oil seal automatic press-fitting device 10 also includes a clamp 150. A grip is provided at one end of the clamp 150, and a positioning rod 152 is provided at the end of the clamp 150 away from the grip. The outer peripheral surface of the clamp 150 is a cylindrical surface, and the diameter of the cylindrical surface gradually increases toward the positioning rod 152. A groove 1221 adapted to the positioning rod 152 is provided at one end of the support member 122 where the oil seal is installed, and the clamp 150 is detachably arranged on the support member 122. In this way, when the guide mechanism 130 is in the first position, the positioning rod 152 of the clamp 150 is inserted into the groove 1221 on the support member 122, so that the clamp 150 is connected to the support member 122. The oil seal is first sleeved on the outer peripheral surface of the clamp 150, and the oil seal is pushed so that the oil seal stably transitions to the support member 122. After the oil seal is sleeved on the support member 122, the clamp 150 is separated from the support member 122 for subsequent press-fitting operations.

[0051] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features.

[0052] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0054] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0055] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An automatic press-fit device for crankshaft oil seal, characterized in that: include: A machine base, a press-fitting mechanism, a guide mechanism and a rotating mechanism, wherein the press-fitting mechanism is provided with a press-fitting sleeve for supporting an oil seal, the press-fitting mechanism is arranged on the guide mechanism, the guide mechanism is connected to the rotating mechanism, the rotating mechanism is rotatably arranged on the machine base, the guide mechanism can rotate relative to the machine base under the action of the rotating mechanism, so that the guide mechanism switches between a first position and a second position; when the guide mechanism is located at the first position, the oil seal can be installed on the press-fitting sleeve, and when the guide mechanism is located at the second position, the end face of the press-fitting sleeve supporting the oil seal is opposite to the crankshaft, and the end face of the oil seal facing away from the press-fitting sleeve is perpendicular to the axis of the crankshaft, and the guide mechanism can drive the press-fitting sleeve to move along a first direction, and the first direction is perpendicular to the end face of the oil seal; The press-fitting mechanism also includes a support member and an elastic member, the support member is a cylindrical structure, and the oil seal can be sleeved on one end of the support member, a housing cavity is provided in the press-fitting sleeve, the housing cavity is a cylindrical hole cavity, and the housing cavity is provided with an outlet along the second direction, the elastic member is arranged in the housing cavity, and the expansion and contraction direction of the elastic member is parallel to the second direction, one end of the support member sleeved with the oil seal is located outside the housing cavity, and the support member can be inserted into the housing cavity through the outlet of the housing cavity and slidably cooperate with the press-fitting sleeve, one end of the support member away from the oil seal is connected to one end of the elastic member, one end of the elastic member away from the support member is connected to one end of the press-fitting sleeve away from the outlet, and one end of the press-fitting sleeve away from the outlet is connected to the guide mechanism, when the guide mechanism is located at the first position, the first direction intersects with the second direction, and when the guide mechanism is located at the second position, the first direction is parallel to the second direction; The press-fitting mechanism further includes a spring guide sleeve in a cylindrical structure, the spring guide sleeve is slidably arranged in the accommodating cavity along the second direction, the elastic member includes a spring, a accommodating cavity with an open end is arranged in the spring guide sleeve, one end of the spring is inserted into the accommodating cavity and abuts against the spring guide sleeve, the other end of the spring abuts against an end of the press-fitting sleeve away from the outlet, and the support member is connected to the spring guide sleeve; The rotating mechanism comprises a first driving member, the first driving member comprises a rotating shaft, an output end of the rotating shaft is connected to the mounting seat, and the rotating shaft can rotate and drive the mounting seat to rotate around the central axis of the mounting seat.

2. The automatic press-fitting device for crankshaft oil seal according to claim 1, characterized in that: The rotating mechanism includes a rotating part, and the rotating part includes a fixed seat, a mounting seat and a bearing. The fixed seat and the mounting seat are both cylindrical structures. The fixed seat is installed on the machine base, and the mounting seat is rotatably arranged in the fixed seat. The guide mechanism is arranged on the mounting seat, and the bearing is clamped between the fixed seat and the mounting seat.

3. The automatic press-fitting device for crankshaft oil seal according to claim 2, characterized in that: The rotating part also includes a support plate, which is arranged on the mounting seat, and the support plate is provided with a pushing rod, the central axis of the pushing rod is parallel to the central axis of the mounting seat, and the pushing rod is staggered relative to the central axis of the mounting seat, the first driving member includes a telescopic driver and a telescopic rod connected to the telescopic driver, the telescopic driver is hinged to the base, one end of the telescopic rod away from the telescopic driver is connected to the pushing rod, and the telescopic direction of the telescopic rod is perpendicular to the central axis of the mounting seat.

4. The automatic press-fitting device for crankshaft oil seal according to claim 1, characterized in that: The aperture of the accommodating cavity gradually increases along the compression direction of the spring, and the outer diameter of the spring guide sleeve gradually increases, and the elastic member has a compression state and a reset state in the accommodating cavity; when the elastic member is in the reset state, the outer circumferential surface of the spring guide sleeve is tightly attached to the inner circumferential surface of the accommodating cavity, and the spring guide sleeve and the guide mechanism are spaced apart along the second direction; when the elastic member is in the compression state, the support member is located in the accommodating cavity.

5. The automatic press-fitting device for crankshaft oil seal according to claim 4, characterized in that: The accommodating cavity includes a first hole section and a second hole section connected in the second direction, the aperture of the first hole section is larger than the diameter of the second hole section, and the diameter of the second hole section gradually increases along the compression direction, the spring guide sleeve is slidably arranged in the first hole section and the second hole section, and a first step is arranged at the intersection of the inner circumference of the first hole section and the inner circumference of the second hole section, a section with an opening on the spring guide sleeve is a contact section, and a flange is arranged on the outer circumference of the contact section, and the flange is limited in the first hole section, when the elastic member is in a reset state, one end of the support member on which the oil seal is installed is convexly arranged outside the second hole section, the outer circumference of the spring guide sleeve is tightly attached to the inner circumference of the second hole section, and the flange is abutted on the first step.

6. The automatic press-fitting device for crankshaft oil seal according to claim 5, characterized in that: The accommodating cavity also includes a third hole segment, the third hole segment is connected to the second hole segment, and the third hole segment is located on a side of the second hole segment away from the first hole segment, the aperture of the third hole segment is larger than the aperture of the second hole segment, the opening of the third hole segment away from the second hole segment is the outlet, and a second step is provided at the intersection of the inner circumference of the third hole segment and the inner circumference of the second hole segment. When the elastic member is in the reset state, one end of the support member on which the oil seal is installed is located outside the third hole segment, and one end of the support member away from the oil seal is spaced apart from the first step along the second direction. When the elastic member is in the compressed state, the support member is located in the third hole segment.

7. The automatic press-fitting device for crankshaft oil seal according to claim 4, characterized in that: The accommodating cavity also has an inlet in the second direction, and the inlet and the outlet are respectively located at opposite ends of the accommodating cavity along the second direction. A support rod is provided on a side of the guide mechanism facing the inlet, and one end of the spring facing away from the spring guide sleeve is wound around the support rod and abuts against the guide mechanism. When the elastic member is in the reset state, a partial rod section of the support rod is inserted into the accommodating cavity.

8. The automatic press-fitting device for crankshaft oil seal according to claim 1, characterized in that: The guide mechanism includes a guide rod assembly, a second driving member, a mounting plate and a connecting plate arranged at intervals along the second direction, the guide rod assembly includes a driving rod and a guide rod, a plurality of guide rods are provided, and the guiding directions of the plurality of guide rods are parallel to the second direction, the mounting plate is connected to the second driving member, the second driving member is arranged on the rotating mechanism, a positioning hole is provided in the middle of the mounting plate, and a plurality of guide holes are provided at intervals on the mounting plate in a circumferential direction around the positioning hole, the driving rod passes through the positioning hole so that one end of the driving rod is connected to the second driving member, and the other end of the driving rod is connected to the connecting plate, the plurality of guide rods correspond one-to-one to the plurality of guide holes, and the guide rod passes through the guide hole and is connected to the connecting plate.

9. The automatic press-fitting device for crankshaft oil seal according to claim 8, characterized in that: One end of two guide rods adjacent to each other in the longitudinal direction and away from the connecting plate is connected via a connecting block.

10. The automatic press-fitting device for crankshaft oil seal according to any one of claims 1 to 9, characterized in that: The automatic press-fitting device for the crankshaft oil seal also includes a clamp, a handle is provided at one end of the clamp, a positioning rod is provided at the end of the clamp away from the handle, the outer peripheral surface of the clamp is a cylindrical surface, and the diameter of the cylindrical surface gradually increases toward the positioning rod, and the end of the support member on which the oil seal is mounted is provided with a groove that is compatible with the positioning rod, and the clamp is detachably arranged on the support member.

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