Bearing press-fitting tool and using method of bearing press-fitting tool
By designing a floating pressure head and a aligning ball structure in the bearing press-fitting fixture, the problem of positioning shaft-type workpieces was solved, achieving coaxial press-fitting of bearings and ensuring the quality and reliability of bearing press-fitting.
Patent Information
- Application Number
- CN202511571658.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-30
- Publication Date
- 2026-01-23
AI Technical Summary
In the existing technology, the inability to drill center holes in shaft-type workpieces leads to the bearing and pressure head not being able to be positioned relative to each other, which easily results in the bearing being tilted during pressing, and in severe cases, it can lead to the scrapping of shaft-type workpieces and bearings.
A bearing press-fitting fixture was designed, including a first press-fitting seat, a second press-fitting seat, a first press head, a second press head, a aligning ball, and a first elastic element. By using the floating cooperation of the first and second press heads and the aligning ball, alignment and centering are achieved, ensuring the coaxiality of the bearing and the workpiece and avoiding tilted press-fitting.
This method achieves leveling and centering of the bearings to be assembled, avoids tilting deviations during the press-fitting process, and ensures the quality and reliability of the bearing press-fitting.
Smart Images
Figure CN121374484A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of mechanical assembly technology, and in particular to a bearing press-fitting fixture and a method for using the bearing press-fitting fixture. Background Technology
[0002] Bearing press fitting is the process of installing bearings onto shaft-like workpieces, and it is an important part of the mechanical assembly process. In related technologies, the press head of the bearing press-fitting fixture is equipped with a center, and the shaft workpiece is equipped with a center hole. Through the cooperation of the center and the center hole, the press head and the workpiece are positioned so that the press head can press the bearing into the shaft workpiece to complete the bearing press-fitting. However, with the development of shaft-type workpieces, some shaft-type workpieces cannot be drilled with center holes, making it impossible to achieve relative positioning between the shaft-type workpiece and the pressure head. This can easily lead to the phenomenon of bearing tilting during press-fitting, which in severe cases can result in the scrapping of the shaft-type workpiece and the bearing. Summary of the Invention
[0003] In view of this, the present invention provides a bearing press-fit fixture and a method for using the bearing press-fit fixture, so as to at least solve the problem of bearing tilting during press-fitting caused by the inability of the workpiece and the press head to achieve relative positioning.
[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows: This invention provides a bearing press-fitting fixture, which includes a first press-fitting seat, a second press-fitting seat, a first press head, a second press head, a aligning ball, and a first elastic element; The first pressing base and the second pressing base are arranged in parallel, the first pressing head is connected to the first pressing base, and the second pressing base is provided with a positioning hole for mounting the workpiece to be assembled; The second pressure head is connected to the first pressure seat through the first elastic element. The alignment ball is disposed between the first pressure head and the second pressure head, and the first pressure head and the second pressure head clamp the alignment ball. The first pressure head, the second pressure head, the alignment ball, and the positioning hole are collinear. The second pressure head can move with the first pressure seat to the second pressure seat to press the bearing to be assembled onto the workpiece to be assembled.
[0005] Optionally, multiple connecting handles are spaced apart along the circumference of the second pressure head, and there are multiple first elastic elements, with each connecting handle corresponding to one of the first elastic elements; one end of the first elastic element is connected to the end of the connecting handle opposite to the second pressure head, and the other end of the first elastic element is connected to the first pressing seat.
[0006] Optionally, the second pressing head is provided with a receiving hole near one end of the first pressing head, and the diameter of the receiving hole gradually decreases in a direction away from the first pressing head.
[0007] Optionally, the second pressing head is provided with an avoiding hole away from one end of the first pressing head, and the diameter of the avoiding hole is smaller than the outer diameter of the inner ring of the bearing to be assembled and is greater than the diameter of one end of the workpiece to be assembled facing the second pressing head. The second pressing head is folded towards the avoiding hole along the radial direction of the second pressing head away from one end of the first pressing head.
[0008] Optionally, the bearing pressing tool further comprises a connecting piece, and the first pressing seat is provided with a first mounting hole and a second mounting hole. The opening of the first mounting hole faces the first pressing head, and the second mounting hole communicates the first mounting hole and the side wall of the first pressing seat. The first pressing head is provided with a groove structure along the circumferential direction, the first pressing head extends into the first mounting hole, the connecting piece extends into the second mounting hole, and the end of the connecting piece is clamped into the groove structure on the first pressing head.
[0009] Optionally, an annular structure is further arranged between the groove structure and one end of the first pressing head close to the second pressing head, and the diameter of the annular structure is greater than the diameter of the first mounting hole.
[0010] Optionally, the bearing pressing tool further comprises a pressure bearing plate, and the pressure bearing plate is arranged on the side of the first pressing seat away from the second pressing seat.
[0011] Optionally, the bearing pressing tool further comprises a guide buffer rod and a second elastic piece, and the first pressing seat is provided with a guide hole facing the second pressing seat.
[0012] The second elastic piece is sleeved on the guide buffer rod, one end of the guide buffer rod is connected to the second pressing seat, the other end of the guide buffer rod extends into the guide hole, and the diameter of the second elastic piece is greater than the diameter of the guide hole.
[0013] Optionally, the bearing pressing tool further comprises an extension positioning seat, one end of the extension positioning seat is connected to the positioning hole, and the other end of the extension positioning seat is used for mounting the workpiece to be assembled.
[0014] The application also provides a method for using the bearing pressing tool in the second aspect, which is applied to the bearing pressing tool in any one of the first aspect, and the method comprises: mounting the workpiece to be assembled to the positioning hole of the second pressing seat; Placing the bearing to be assembled on the end of the workpiece to be assembled away from the positioning hole of the second pressing seat; Starting the first pressing seat, and moving the first pressing seat close to the second pressing seat until the bearing to be assembled is pressed to the target position on the workpiece to be assembled.
[0015] Compared with the prior art, the bearing pressing tool has the following advantages: In the bearing pressing tool, the workpiece to be assembled is positioned in the positioning hole on the second pressing seat, the pressing head on the first pressing seat is divided into a first pressing head and a second pressing head, the second pressing head is floating through the first elastic member, and the second pressing head has multiple degrees of freedom and can be in surface contact with the surface of the inclined bearing to be assembled; the first pressing head transmits the pressure load to the alignment ball, the alignment ball can realize alignment and centering between the first pressing head and the second pressing head, the second pressing head compensates for the flattening during the pressing of the first pressing seat, thereby driving the bearing to be assembled in surface contact with the second pressing head to be flattened, avoiding inclination deviation when the bearing to be assembled is pressed to the workpiece to be assembled, and ensuring the quality of bearing pressing.
[0016] The use method of the bearing pressing tool has the same or similar advantages as the bearing pressing tool, and will not be described here. BRIEF DESCRIPTION OF DRAWINGS
[0017] The accompanying drawings, which form a part of the present application, are intended to provide further understanding of the present application, and the illustrative embodiments thereof and their descriptions serve to explain the present application, and do not constitute improper limitations on the present application. In the drawings: Figure 1 is an axonometric view of a bearing pressing tool in an embodiment of the present application; Figure 2 is a front view of a bearing pressing tool in an embodiment of the present application; Figure 3 is a side view of a bearing pressing tool in an embodiment of the present application; Figure 4 is a bearing pressing tool in Figure 3 is a cross-sectional view along A-A of the bearing pressing tool in Figure 5 is an exploded view of a bearing pressing tool in an embodiment of the present application; Figure 6 is a step flowchart of a use method of a bearing pressing tool in an embodiment of the present application.
[0018] Explanation of Reference Signs: 1, first pressing seat; 10, first mounting hole; 11, second mounting hole; 13, guide hole; 2, second pressing seat; 21, positioning hole; 3, first pressing head; 31, groove structure; 32, annular structure; 4, second pressing head; 41, connecting handle; 42, accommodating hole; 43, avoiding hole; 5, alignment ball; 6, first elastic member; 7, bearing to be assembled; 8, workpiece to be assembled; 91, pressure bearing plate; 92, guide buffer rod; 93, second elastic member. DETAILED DESCRIPTION
[0019] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the protection scope of the present application.
[0020] The terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a particular order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally a class, and are not limited to the number of objects, for example, the first object can be one or more.
[0021] It should be understood that "some embodiments" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiments are included in at least one embodiment of the present application. Therefore, "in some embodiments" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner.
[0022] A bearing pressing tool provided by the present application will be described in detail below by listing specific embodiments.
[0023] Combined with reference Figure 1 , Figure 2 , Figure 3 and Figure 4 , wherein Figure 1 is an axonometric structural schematic diagram of a bearing pressing tool provided by the present application, Figure 2 and Figure 3 are respectively Figure 1 front view and side view, Figure 4 then Figure 3The application provides a bearing press-fitting tool, which comprises a first press-fitting base 1, a second press-fitting base 2, a first press head 3, a second press head 4, a locating ball 5 and a first elastic member 6; the first press-fitting base 1 is arranged in parallel with the second press-fitting base 2; the first press head 3 is connected with the first press-fitting base 1; the second press-fitting base 2 is provided with a positioning hole 21 for mounting a workpiece 8 to be assembled; the second press head 4 is connected with the first press-fitting base 1 through the first elastic member 6; the locating ball 5 is arranged between the first press head 3 and the second press head 4, and the first press head 3 and the second press head 4 clamp the locating ball 5; the first press head 3, the second press head 4, the locating ball 5 and the positioning hole 21 are collinear; the second press head 4 can move with the first press-fitting base 1 towards the second press-fitting base 2, so as to press-fit a bearing 7 to be assembled on the workpiece 8 to be assembled.
[0024] The bearing press-fitting tool can be used to press-fit the bearing 7 to be assembled on the workpiece 8 to be assembled, and the workpiece 8 to be assembled is generally a shaft workpiece and can have an axial positioning component such as a shaft shoulder; on the one hand, the axial positioning component such as the shaft shoulder can realize the positioning of the bearing 7 to be assembled along the axial direction of the workpiece 8 to be assembled after the bearing 7 to be assembled is press-fitted on the workpiece 8 to be assembled; on the other hand, the axial positioning component such as the shaft shoulder can limit the axial movement of the workpiece 8 to be assembled when the workpiece 8 to be assembled is mounted on the positioning hole 21 of the second press-fitting base 2, so that the workpiece 8 to be assembled and the positioning hole 21 remain relatively fixed.
[0025] The first press-fitting base 1 can be movable, and the second press-fitting base 2 can be fixedly arranged; the first press-fitting base 1 of the bearing press-fitting tool can move relative to the second press-fitting base 2, and drive the first press head 3, the locating ball 5 and the second press head 4 arranged on the first press-fitting base 1 to move; in the process that the first press-fitting base 1 approaches the second press-fitting base 2, the second press head 4 can contact the bearing 7 to be assembled, so as to press-fit the bearing 7 to be assembled on the workpiece 8 to be assembled.
[0026] The bearing press-fitting tool transmits the pressure to the bearing 7 to be assembled through the first press head 3, the locating ball 5 and the second press head 4; the first press head 3 is fixedly connected with the first press-fitting base 1, and the second press head 4 is indirectly connected with the first press-fitting base 1 through the first elastic member 6, so that the second press head 4 is in a floating state; the locating ball 5 is arranged between the first press head 3 and the second press head 4, and contacts the first press head 3 and the second press head 4 respectively; the second press head 4 is pulled back to the direction of approaching the first press head 3 through the first elastic member 6, so that the locating ball 5 is pressed tightly by the first press head 3 and the second press head 4; the axis of the first press head 3, the axis of the second press head 4 and the axis of the positioning hole 21 are collinear and pass through the ball center of the locating ball 5, so that the first press head 3, the locating ball 5, the second press head 4 and the positioning hole 21 are collinear.
[0027] When the bearing 7 to be assembled is placed obliquely on the workpiece 8 to be assembled (the bearing 7 to be assembled is inclined relative to the axis of the workpiece 8 to be assembled), and the first pressing seat 1 moves towards the second pressing seat 2, the second pressing head 4 first contacts the bearing 7 to be assembled. Since the second pressing head 4 is in a floating state, the second pressing head 4 has multiple degrees of freedom in multiple directions, can swing around the alignment ball 5, and the end surface of the second pressing head 4 away from the alignment ball 5 will be in contact with the surface of the bearing 7 to be assembled, so that the second pressing head 4 is in contact with the bearing 7 to be assembled, that is, the second pressing head 4 can float with the bearing to be assembled; when the first pressing seat 1 continues to move towards the second pressing seat 2, the direction of the resultant force of the second pressing head 4 on the alignment ball 5 deviates from (is not collinear with) the direction of the resultant force of the first pressing head 3 on the alignment ball 5, so that the alignment ball 5 rotates, and at the same time, the first elastic member 6 is deformed due to the inclination of the second pressing head 4, the first elastic member 6 away from the inclined direction is stretched, and a pulling force for aligning the second pressing head 4 is generated. Under the action of the alignment ball 5 and the first elastic member 6, the second pressing head 4 is gradually aligned, the bearing 7 to be assembled in contact with the end surface of the second pressing head 4 is gradually aligned, that is, the bearing 7 to be assembled is gradually perpendicular to the axis of the workpiece 8 to be assembled, the coaxiality error between the bearing 7 to be assembled and the workpiece 8 to be assembled is gradually reduced, and the bearing 7 to be assembled can be directly pressed and assembled on the workpiece 8 to be assembled along the axis of the workpiece 8 to be assembled, avoiding the inclined pressing and jamming of the bearing 7 to be assembled.
[0028] In the bearing pressing tool, the workpiece 8 to be assembled is positioned in the positioning hole 21 on the second pressing seat 2 to realize center positioning, the pressing head on the first pressing seat 1 is divided into the first pressing head 3 and the second pressing head 4, the second pressing head 4 is floating through the first elastic member 6, so that the second pressing head 4 has multiple degrees of freedom in multiple directions, can be in surface contact with the surface of the obliquely placed bearing 7 to be assembled; the first pressing head 3 transmits the pressure load to the alignment ball 5, the alignment ball 5 can realize the alignment and centering between the first pressing head 3 and the second pressing head 4, so that the second pressing head 4 compensates for the alignment in the process of being pressed by the first pressing seat 1, thereby driving the bearing 7 to be assembled in surface contact with the second pressing head 4 to align, avoiding the inclination deviation of the bearing 7 to be assembled when being pressed and assembled on the workpiece 8 to be assembled, and ensuring the quality of the bearing pressing. Optionally, in combination with the description of Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , a plurality of connecting handles 41 are arranged at intervals in the circumferential direction of the second pressing head 4, and the first elastic member 6 has a plurality of connecting handles 41 corresponding to the first elastic member 6; one end of the first elastic member 6 is connected to the end of the connecting handle 41 away from the second pressing head 4, and the other end of the first elastic member 6 is connected to the first pressing seat 1.
[0029] The first elastic member 6 can be provided in plurality, and the plurality of connecting handles 41 can be arranged on the side wall of the second pressing head 4 and spaced apart along the circumference of the second pressing head 4; for each first elastic member 6, one end of the first elastic member 6 can be fixedly connected to one end of the connecting handle 41 away from the side wall of the second pressing head 4, and the other end of the first elastic member 6 can be fixedly connected to the side of the first pressing seat 1 facing the second pressing head 4.
[0030] In a preferred embodiment, the first elastic member 6 and the connecting handle 41 are both provided in four, the connecting handle 41 is arranged at an interval of 90° along the circumference of the second pressing head 4, the connecting handle 41 is provided in a rod shape, the extension direction of the connecting handle 41 is collinear with the radial direction of the second pressing head 4, the first elastic member 6 is a cylindrical spring, and the length direction of the first elastic member 6 is parallel to the axis of the first pressing head 3.
[0031] Through the plurality of connecting handles 41 arranged along the circumference of the second pressing head 4 and the first elastic member 6 arranged on the connecting handle 41, the second pressing head 4 can be provided with multi-directional pull correction support, so that the second pressing head 4 can be pulled back to the correct position after contacting the bearing 7 in any inclined direction, and at the same time, the plurality of first elastic members 6 can provide elastic buffering in multiple directions, so as to ensure the stability of the second pressing head 4 in the floating state, avoid the vibration and oscillation of the second pressing head 4 during the pressing process, and ensure the quality of the bearing pressing.
[0032] Optionally, in combination with the description of Figure 4 and Figure 5 , Figure 5 , the bearing pressing tool provided by the embodiment of the present application is shown in an exploded view, and the end of the second pressing head 4 close to the first pressing head 3 is provided with a receiving hole 42, and the diameter of the receiving hole 42 gradually decreases in the direction away from the first pressing head 3.
[0033] The first segment of the second pressing head 4 close to the first pressing head 3 is provided with a receiving hole 42, and the receiving hole 42 can be provided in a conical shape (conical hole or circular truncated cone hole), that is, the diameter of the receiving hole 42 gradually decreases in the direction away from the first pressing head 3, and the diameter of the alignment ball 5 can be configured to be greater than at least part of the diameter of the receiving hole 42, so that when the alignment ball 5 is placed in the receiving hole 42, the alignment ball 5 can be in line contact with the hole wall of the receiving hole 42, as shown in Figure 4 , the cross section of the receiving hole 42 is similar to a V shape.
[0034] The accommodating hole 42 is arranged to provide an accommodating space and constraint for the alignment ball 5, to ensure that the first pressing head 3 and the second pressing head 4 can press the alignment ball 5 tightly, so that when the second pressing head 4 is tilted, the alignment ball 5 will not be bounced out of the gap between the first pressing head 3 and the second pressing head 4. The accommodating hole 42 and the alignment ball 5 can form a spherical hinge structure. When the direction of the force of the second pressing head 4 on the alignment ball 5 is not collinear with the direction of the force of the second pressing head 4 on the alignment ball 5, and the alignment ball 5 is rotated, the spherical hinge structure can ensure the stability of the rotation process of the alignment ball 5.
[0035] Optionally, referring to Figure 4 , the end of the second pressing head 4 away from the first pressing head 3 is provided with a avoiding hole 43, the diameter of the avoiding hole 43 is smaller than the outer diameter of the inner ring of the bearing 7 to be assembled, and the diameter of the avoiding hole 43 is greater than the diameter of the end of the workpiece 8 to be assembled facing the second pressing head 4; the end of the second pressing head 4 away from the first pressing head 3 is folded towards the avoiding hole 43 along the radial direction of the second pressing head 4.
[0036] The second pressing head 4 needs to press the bearing 7 to be assembled into the workpiece 8 to be assembled, so the avoiding hole 43 can be arranged in the second pressing head 4 to avoid the workpiece 8 to be assembled. It can be understood that the diameter of the avoiding hole 43 should be greater than the diameter of the end of the workpiece 8 to be assembled facing the second pressing head 4 (the diameter of the shaft in the workpiece 8 to be assembled which cooperates with the bearing 7 to be assembled), so as to accommodate the workpiece 8 to be assembled, and at the same time the diameter of the avoiding hole 43 should be smaller than the outer diameter of the inner ring of the bearing 7 to be assembled, to ensure that the second pressing head 4 can contact the inner ring of the bearing 7 to be assembled.
[0037] The end of the second pressing head 4 away from the first pressing head 3 is folded towards the avoiding hole 43 along the radial direction of the second pressing head 4, that is, the diameter of the end of the second pressing head 4 for contacting the bearing 7 to be assembled is smaller than the diameter of the opposite end of the second pressing head 4. The diameter of the end of the second pressing head 4 away from the first pressing head 3 can be matched with the outer diameter of the inner ring of the bearing 7 to be assembled after folding, for example, the diameter of the end of the second pressing head 4 away from the first pressing head 3 after folding is between the outer diameter of the inner ring and the inner diameter of the outer ring of the bearing 7 to be assembled, so that the end face of the second pressing head 4 mainly contacts the inner ring of the bearing 7 to be assembled after contacting the bearing 7 to be assembled. The significance of this arrangement is that the bearing 7 to be assembled cooperates with the workpiece 8 to be assembled by the inner ring, and the inner ring is a component of the bearing 7 to be assembled that bears axial load. This arrangement can avoid the second pressing head 4 contacting the outer ring of the bearing 7 to be assembled, thereby avoiding the second pressing head 4 applying axial load to the outer ring of the bearing 7 to be assembled, and avoiding damage to the bearing 7 to be assembled.
[0038] Optionally, in combination with referring to Figure 4 and Figure 5The bearing press-fitting tool further comprises a connecting piece (not shown in the figure), the first press-fitting seat 1 is provided with a first mounting hole 10 and a second mounting hole 11; the opening of the first mounting hole 10 faces the first press head 3, and the second mounting hole 11 communicates the first mounting hole 10 and the side wall of the first press-fitting seat 1; the first press head 3 is provided with a groove structure 31 in the circumferential direction; the first press head 3 extends into the first mounting hole 10, the connecting piece extends into the second mounting hole 11, and the end of the connecting piece is clamped into the groove structure 31 on the first press head 3.
[0039] The first press head 3 and the first press-fitting seat 1 are first connected through the first mounting hole 10, that is, the first press head 3 is connected with the first mounting hole 10 in the first press-fitting seat 1; in addition, the second mounting hole 11 is provided between the side wall of the first press-fitting seat 1 and the first mounting hole 10, that is, the second mounting hole 11 communicates the inner wall of the first mounting hole 10 and the side wall of the first press-fitting seat 1, the setting direction of the second mounting hole 11 is collinear with the diameter of the first mounting hole 10, the groove structure 31 is provided on the side wall of the first press head 3 in the circumferential direction of the first press head 3, and after the first press head 3 extends into the first mounting hole 10, the groove structure 31 is flush with the second mounting hole 11; at this time, the connecting piece (bolt, positioning pin, etc.) is inserted into the second through hole from the side wall of the first press-fitting seat 1, the end of the connecting piece is clamped into the groove structure 31, the connecting piece abuts against the first press head 3, the first press head 3 is constrained by the connecting piece, the axial fixation of the first press head 3 in the first mounting hole 10 is realized, and the groove structure 31 can be configured as a communication groove around the circumference of the first press head 3 or can be configured as a groove arranged in the circumferential direction of the first press head 3, which is not limited in the embodiment of the application.
[0040] Through the first mounting hole 10, the preliminary fixed connection of the first press head 3 and the first press-fitting seat 1 can be realized, through the second mounting hole 11 provided on the first press-fitting seat 1 and the groove structure 31 provided on the first press head 3, the positioning and fixation of the first press head 3 and the first press-fitting seat 1 can be realized, the stability of the first press head 3 during load transmission is ensured, and the quality effect of bearing press-fitting is ensured.
[0041] Optionally, a ring structure 32 is further provided between the groove structure 31 and the end of the first press head 3 close to the second press head 4, and the diameter of the ring structure 32 is greater than the diameter of the first mounting hole 10.
[0042] Between the recess structure 31 and the end of the first pressing head 3 close to the second pressing head 4, an annular structure 32 (a shaft ring or a shaft shoulder structure) is arranged, the diameter of the annular structure 32 is greater than the diameter of the first mounting hole 10, so that after the first pressing head 3 is inserted into the first mounting hole 10, the annular structure 32 abuts against the surface of the first pressing seat 1, limiting the further insertion of the first pressing head 3, realizing the positioning of the first pressing head 3 in the axial direction of the first mounting hole 10, and ensuring that the first pressing head 3 does not slide in the axial direction relative to the first mounting hole 10 during the bearing pressing process; the annular structure 32 can also disperse part of the axial load, avoiding damage to the connecting piece and the recess structure 31 caused by excessive axial load, and further ensuring the stability of the first pressing head 3 during the pressing process.
[0043] Optionally, referring to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , the bearing pressing tool further comprises a pressure bearing plate 91 arranged on the side of the first pressing seat 1 away from the second pressing seat 2.
[0044] The first pressing seat 1 can also transmit pressure load, that is, the first pressing seat 1 is in contact with and pressed by other pressing heads outside the bearing pressing tool, and for this purpose, a pressure bearing plate 91 (or a pressure bearing block) can be arranged on the side of the first pressing seat 1 away from the second pressing seat 2 to receive pressure load from outside the bearing pressing tool. The pressure bearing plate 91 can be fixedly connected to the surface of the first pressing seat 1 by using positioning pins and the like.
[0045] Optionally, referring to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , the bearing pressing tool further comprises a guide buffer rod 92 and a second elastic member 93, and the first pressing seat 1 is provided with a guide hole 13 facing the second pressing seat 2; the second elastic member 93 is sleeved on the guide buffer rod 92, one end of the guide buffer rod 92 is connected to the second pressing seat 2, the other end of the guide buffer rod 92 extends into the guide hole 13, and the diameter of the second elastic member 93 is greater than the diameter of the guide hole 13.
[0046] In an optional embodiment, the first pressing seat 1 and the second pressing seat 2 are connected by a guide buffer rod 92. A guide hole 13 can be opened on each side of the first mounting hole 10 of the first pressing seat 1, and the two guide holes 13 can be symmetrical with respect to the axis of the first mounting hole 10. A guide buffer rod 92 is provided between the first pressing seat 1 and the second pressing seat 2. One end of the guide buffer rod 92 is fixedly connected to the second pressing seat 2, and the other end of the guide buffer rod 92 extends into the guide hole 13. A second elastic member 93 is sleeved on the guide buffer rod 92. The diameter of the second elastic member 93 is larger than the diameter of the guide hole 13. Thus, the two ends of the second elastic member 93 can respectively abut against the first pressing seat 1 and the second pressing seat 2.
[0047] As the first press seat 1 approaches the second press seat 2, the second elastic element 93 is compressed along the axial direction of the guide buffer rod 92, providing a buffering effect for the bearing press-fitting process and preventing the bearing 7 or workpiece 8 to be assembled from being crushed. Part of the guide buffer rod 92 extends into the guide hole 13, playing a guiding role between the first press seat 1 and the second press seat 2, ensuring that the axis of the first press head 3 on the first press seat 1 and the axis of the positioning hole 21 on the second press seat 2 are always collinear during the bearing press-fitting process.
[0048] Optionally, the bearing press-fitting fixture also includes an extended positioning seat (all shown in the figure), one end of which is connected to the positioning hole 21, and the other end of which is used to install the workpiece 8 to be assembled.
[0049] When the stroke of the first press-fit seat 1 does not meet the press-fit requirements of the workpiece 8 to be assembled (the stroke of the first press-fit seat 1 is insufficient and cannot press the bearing 7 to be assembled to the target position of the workpiece 8 to be assembled), an extension positioning seat can be set on the positioning hole 21 to increase the height of the workpiece 8 to be assembled relative to the second press-fit seat 2, reduce the initial distance between the workpiece 8 to be assembled and the first positioning seat, and ensure that the stroke of the first press-fit seat 1 can cover the workpiece 8 to be assembled.
[0050] In the bearing press-fitting fixture of the present invention, the workpiece to be assembled is placed in the positioning hole on the second press-fitting seat to achieve center positioning. The press head on the first press-fitting seat is divided into a first press head and a second press head. The second press head floats through a first elastic element, giving it multiple degrees of freedom in multiple directions, allowing it to make surface contact with the surface of the inclined bearing to be assembled. The first press head transmits the pressure load to the alignment ball, which can achieve alignment and centering between the first and second press heads. This allows the second press head to compensate for leveling during the pressing process of the first press-fitting seat, thereby driving the bearing to be assembled, which is in surface contact with the second press head, to level out and avoid tilting deviation when the bearing to be assembled is pressed onto the workpiece, ensuring the quality of bearing press-fitting.
[0051] like Figure 6 As shown, Figure 6The application further provides a bearing press-fitting tool use method, comprising the following steps: Step 101, installing the workpiece to be assembled into the positioning hole of the second press-fitting seat; Step 102, placing the bearing to be assembled at the end of the workpiece to be assembled away from the positioning hole; Step 103, starting the first press-fitting seat to move the first press-fitting seat close to the second press-fitting seat until the bearing to be assembled is press-fitted to the target position on the workpiece to be assembled.
[0052] In the use of the bearing press-fitting tool provided by the application, the workpiece to be assembled is first installed into the positioning hole, the workpiece to be assembled can be connected with the positioning hole in cooperation, and the shaft shoulder or bearing stopper is used to realize the axial positioning of the workpiece to be assembled on the second press-fitting seat.
[0053] After the workpiece to be assembled is installed into the positioning hole, the bearing to be assembled can be placed at the end of the workpiece to be assembled by manual or other methods, the bearing to be assembled slides to the end of the workpiece to be assembled away from the positioning hole under the action of gravity, the inner ring of the bearing to be assembled contacts the workpiece to be assembled, and the bearing to be assembled and the workpiece to be assembled are kept stationary. In this process, it is not required that the inner ring of the bearing to be assembled is perpendicular to the axis of the workpiece to be assembled.
[0054] Then, the first press-fitting seat is started, that is, the first press-fitting seat is driven to move towards the second press-fitting seat, the first press-fitting seat drives the second pressure head, the floating second pressure head contacts the surface of the bearing to be assembled, the pre-pressing of the second pressure head and the bearing to be assembled is realized, with the continuous movement of the first press-fitting seat, the righting ball starts to rotate, the second pressure head is gradually leveled, the bearing to be assembled is gradually leveled, and the inclined press-fitting or jamming of the bearing to be assembled due to the inclined placement is avoided; the target position on the workpiece to be assembled can be the position where the shaft shoulder or the bearing stopper and other components realizing the axial positioning are located, when the displacement of the bearing to be assembled reaches the set value, it indicates that the target position is reached, for example, the end face of the inner ring of the bearing to be assembled is lower than the end face of the workpiece to be assembled by a preset distance.
[0055] After the bearing to be assembled is press-fitted into the target position of the workpiece to be assembled, the second pressure head can maintain the pressure for a preset time to release the elastic deformation and reduce the rebound amount, then the first press-fitting seat is controlled to move away from the second press-fitting seat to realize the separation of the second pressure head and the bearing to be assembled, when the second pressure head completely leaves the workpiece to be assembled and the bagged bearing, the second pressure head returns to the default position, the assembled workpiece and bearing can be taken, and the bearing press-fitting of the next workpiece to be assembled can be started. The return of the second pressure head can adopt a staged speed regulation mode, for example, first, the second pressure head is retreated at a speed of 20 mm / s to completely separate the second pressure head from the bearing, and then the second pressure head is retreated to the default position at a speed of 100 mm / s to avoid the contact between the second pressure head and the workpiece or the bearing during the return process.
[0056] The bearing press-fitting tool of the present application, the workpiece to be assembled is positioned in the positioning hole on the second press-fitting seat to realize center positioning, the press head on the first press-fitting seat is divided into a first press head and a second press head, the second press head is floating through the first elastic member, so that the second press head has multiple degrees of freedom and can be in surface contact with the surface of the inclined placed bearing to be assembled; the first press head transmits the pressure load to the alignment ball, the alignment ball can realize alignment centering between the first press head and the second press head, so that the second press head compensates for the leveling during the pressing process of the first press-fitting seat, thereby driving the bearing to be assembled in surface contact with the second press head to level, avoiding the inclination deviation of the bearing to be assembled when being press-fitted to the workpiece to be assembled, and ensuring the quality of bearing press-fitting.
[0057] Finally, it should be noted that in this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.
[0058] The above description is merely preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, and the like made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims
1. A bearing press-fitting tool characterized by, The bearing press-fitting tool comprises a first press-fitting seat, a second press-fitting seat, a first press head, a second press head, a locating ball and a first elastic member; The first press-fitting seat is arranged in parallel with the second press-fitting seat, the first press head is connected with the first press-fitting seat, and the second press-fitting seat is provided with a positioning hole for mounting a workpiece to be assembled; The second press head is connected with the first press-fitting seat through the first elastic member, the locating ball is arranged between the first press head and the second press head, and the first press head and the second press head clamp the locating ball; the first press head, the second press head, the locating ball and the positioning hole are collinear; The second press head can move towards the second press-fitting seat along with the first press-fitting seat to press-fit a bearing to be assembled onto the workpiece to be assembled.
2. The bearing press-fitting tool according to claim 1, wherein A plurality of connecting handles are arranged at intervals in the circumferential direction of the second press head, the first elastic member has a plurality of first elastic members, the connecting handle and the first elastic member correspond to each other one by one; one end of the first elastic member is connected to the end of the connecting handle away from the second press head, and the other end of the first elastic member is connected to the first press-fitting seat.
3. The bearing press-fitting tool according to claim 1, wherein An accommodating hole is formed in the end of the second press head close to the first press head, and the diameter of the accommodating hole gradually decreases in the direction away from the first press head.
4. The bearing press-fitting tool according to claim 1, wherein An avoiding hole is formed in the end of the second press head away from the first press head, the diameter of the avoiding hole is smaller than the outer diameter of the inner ring of the bearing to be assembled, and the diameter of the avoiding hole is greater than the diameter of the end of the workpiece to be assembled facing the second press head; The end of the second press head away from the first press head is folded towards the avoiding hole in the radial direction of the second press head.
5. The bearing press-fitting tool according to claim 1, wherein The bearing press-fitting tool further comprises a connecting member, and the first press-fitting seat is provided with a first mounting hole and a second mounting hole; The opening of the first mounting hole faces the first press head, and the second mounting hole communicates the first mounting hole and the side wall of the first press-fitting seat; The first press head is provided with a groove structure in the circumferential direction; the first press head extends into the first mounting hole, the connecting member extends into the second mounting hole, and the end of the connecting member is clamped into the groove structure on the first press head.
6. The bearing press fitting tool of claim 5, wherein, An annular structure is further arranged between the groove structure and the end of the first press head close to the second press head, and the diameter of the annular structure is greater than the diameter of the first mounting hole.
7. The bearing press-fitting tool of claim 1, wherein The bearing press-fitting tool further comprises a pressure receiving plate arranged on the side of the first press-fitting seat away from the second press-fitting seat.
8. The bearing press-fitting tool of claim 1, wherein The bearing press-fitting tool further comprises a guide buffer rod and a second elastic member, and the first press-fitting seat is provided with a guide hole facing the second press-fitting seat; The second elastic member is sleeved on the guide buffer rod, one end of the guide buffer rod is connected with the second press-fitting seat, the other end of the guide buffer rod extends into the guide hole, and the diameter of the second elastic member is greater than the diameter of the guide hole.
9. The bearing press-fitting tool of claim 1, wherein The bearing press-fitting tool further comprises an extension positioning seat, one end of the extension positioning seat is connected with the positioning hole, and the other end of the extension positioning seat is used for mounting the workpiece to be assembled.
10. A method of using a bearing press tool, the method comprising: The method is applied to the bearing press-fitting tool according to any one of claims 1 to 9, and the method comprises: positioning hole of a second press fitting seat; placing a bearing to be assembled at an end of the workpiece to be assembled away from the positioning hole; starting the first press fitting seat, so that the first press fitting seat approaches the second press fitting seat until the bearing to be assembled is press fitted to a target position on the workpiece to be assembled.