Double outer ring bearing fixing device

Abstract

The present invention discloses a double outer ring bearing fixing device, which includes three preloading devices. The three preloading devices are circumferentially distributed. The preloading device includes a housing, an upper jacking column and a lower jacking column. A preloading cavity is provided on the housing. The upper jacking column is arranged on the upper cavity wall of the preloading cavity in a liftable manner, and the lower jacking column is arranged on the lower cavity wall of the preloading cavity in a liftable manner. The upper jacking column and the lower jacking column have the same shape, size and structure. A elastic force providing device is provided in the housing, and the elastic force providing device is linked with the upper jacking column and the lower jacking column. In the double outer ring bearing fixing device of the present invention, through the setting of the preloading cavity on the housing, the upper jacking column and the lower jacking column, the effect that the pressures applied to the upper and lower end faces of the bearing outer ring are the same can be effectively achieved.

Description

Technical Field

[0001] The present invention relates to a bearing fixing device, and more particularly to a double outer ring bearing fixing device. Background Art

[0002] For the parameter measurement of a double outer ring bearing, a certain degree of preloading is required for the outer ring of the bearing to ensure that the outer ring of the bearing is in a semi-rigid state and to avoid irregular axial movement of the outer ring.

[0003] Therefore, in the prior art, the invention patent with the patent number 2021225756780 and the name of a preloading device for selecting gaskets for tapered roller bearings discloses a method of setting a preloading guiding mechanism. By using the preloading guiding rod and the first bushing of the preloading guiding mechanism, the preloading of the outer ring of the bearing is achieved by the up and down sliding of the preloading guiding rod in the first bushing. However, during the preloading process of the above-mentioned preloading device structure, only the lower end of the preloading guiding rod needs to be abutted against the outer ring of the bearing, and then the preloading effect on the outer ring of the bearing is achieved by generating a reaction force through the flat base arranged outside. However, since the contact area between the base and the outer ring of the bearing is different from the contact area between the end of the preloading guiding rod and the outer ring of the bearing, during the preloading process, the pressure intensities received by the upper and lower end faces of the outer ring of the bearing are different, so the preloading effect cannot be well achieved. Summary of the Invention

[0004] Aiming at the deficiencies existing in the prior art, the purpose of the present invention is to provide a double outer ring bearing fixing device that can better achieve the preloading effect.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A double outer ring bearing fixing device includes three preloading devices that are circumferentially distributed. The preloading device includes a housing, an upper jacking column, and a lower jacking column. A preloading cavity is opened on the housing. The upper jacking column is arranged on the upper cavity wall of the preloading cavity in a liftable manner, and the lower jacking column is arranged on the lower cavity wall of the preloading cavity in a liftable manner. The upper jacking column and the lower jacking column have the same shape, size, and structure to cooperate with each other to abut against the upper and lower end faces of the outer ring of the bearing. A elastic force providing device is arranged in the housing, and this elastic force providing device is linked with the upper jacking column and the lower jacking column to provide elastic force to the upper jacking column and the lower jacking column and then provide preloading force.

[0006] As a further improvement of the present invention, the housing is formed by bending a pipe into a C shape. The two ends of the pipe are arranged vertically opposite to each other, and the preloading cavity is formed between the two ends. The upper jacking column is slidably arranged in the upper end of the pipe, and the lower jacking column is slidably arranged in the lower end of the pipe.

[0007] As a further improvement of the present invention, the elastic force providing device includes an elastic spring and a plurality of steering steel balls. The elastic spring is coaxially disposed inside the vertical section of the housing. A plurality of the steering steel balls are filled in the bent section of the housing and are arranged side by side. The steering steel balls respectively abut against the end portions of the elastic spring, the upper top column and the lower top column to transmit the elastic force of the elastic spring to the upper top column and the lower top column.

[0008] As a further improvement of the present invention, a clamping edge is provided on the inner side wall of the end portion of the housing. Clamping platforms are provided at the opposite ends of the upper top column and the lower top column. When the upper top column descends to the maximum position and the lower top column ascends to the maximum position, the clamping platforms abut against the clamping edge.

[0009] As a further improvement of the present invention, the elastic spring includes an upper spring, a lower spring and an elastic force adjusting column. The upper spring, the lower spring and the elastic force adjusting column are all disposed inside the vertical section of the housing. The upper end of the upper spring abuts against the steering steel ball, and the lower end of the upper spring is connected to the upper end of the elastic force adjusting column. The upper end of the lower spring is connected to the lower end of the elastic force adjusting column, and the lower end of the lower spring abuts against the steering steel ball.

[0010] As a further improvement of the present invention, the elastic force adjusting column includes a column sleeve, an upper sliding column and a lower sliding column. The column sleeve is coaxially fixed inside the housing. A double-shaft motor is fixedly connected inside the column sleeve. The double shafts of the double-shaft motor are respectively coaxially sleeved with lead screws. The upper sliding column is slidably disposed inside the column sleeve and is located above the double-shaft motor. The lower end of the upper sliding column is threadedly connected to the lead screw at the upper end of the double-shaft motor. The upper end of the upper sliding column is fixedly connected to the upper spring. The lower sliding column is slidably disposed inside the column sleeve and is located below the double-shaft motor. The lower end of the lower sliding column is threadedly connected to the lead screw at the lower end of the double-shaft motor. The lower end of the lower sliding column is fixedly connected to the lower spring.

[0011] As a further improvement of the present invention, fixing ring grooves are provided at the upper end of the upper sliding column and the lower end of the lower sliding column. The lower end of the upper spring and the upper end of the lower spring are respectively embedded in the fixing ring grooves to be fixedly connected to the end portions of the upper sliding column and the lower sliding column.

[0012] As a further improvement of the present invention, a detection groove is provided at the upper end of the upper sliding column. A detection column is disposed inside the detection groove. A connection disk is coaxially fixed at the upper end of the detection column. The fixing ring groove is provided on the outer side wall of the connection disk. A conductive block is fixed at the lower end of the detection column. A variable resistance coil is coaxially fixed inside the detection groove. The detection column is disposed inside the variable resistance coil, and the conductive block is in contact with the variable resistance coil and is electrically connected to each other.

[0013] The beneficial effects of the present invention are as follows. By providing the housing, the upper top column, the lower top column, and the elastic force providing device, an effect of preloading the outer ring of the bearing can be effectively formed. Thus, compared with the existing technology, since the upper top column and the lower top column have the same shape, size, and structure, the contact surfaces of the outer ring of the bearing when under pressure can be ensured to be the same, and the problem that the upper and lower end faces of the outer ring of the bearing bear uneven pressure due to different contact surfaces in the prior art is well avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the double outer ring bearing fixing device of the present invention;

[0015] Figure 2 is Figure 1 the internal structural diagram of the preloading device in

[0016] Figure 3 is Figure 2 the internal structural diagram of the elastic force adjusting column in DETAILED DESCRIPTION OF THE INVENTION

[0017] The present invention will be further described in detail below with reference to the embodiments shown in the drawings.

[0018] Referring to Figures 1 to 3 as shown, a double outer ring bearing fixing device in this embodiment includes three preloading devices which are circumferentially distributed. The preloading device includes a housing 1, an upper top column 2, and a lower top column 3. A preloading cavity 4 is formed on the housing 1. The upper top column 2 is arranged on the upper cavity wall of the preloading cavity 4 in a liftable manner, and the lower top column 3 is arranged on the lower cavity wall of the preloading cavity 4 in a liftable manner. The upper top column 2 and the lower top column 3 have the same shape, size, and structure to cooperate with each other to press against the upper and lower end faces of the outer ring of the bearing. An elastic force providing device 5 is arranged in the housing 1, and the elastic force providing device 5 is linked with the upper top column 2 and the lower top column 3 to provide elastic force to the upper top column 2 and the lower top column 3 so as to provide preloading force. During the process of using the fixing device in this embodiment, it is only necessary to press the upper top column 2 and the lower top column 3 against the upper and lower end faces of the outer ring of the bearing respectively, and then the elastic force providing device 5 is used to provide the corresponding applied force, which well realizes the preloading effect on the outer ring of the bearing. And since the upper top column 2 and the lower top column 3 with the same shape, size, and structure are used for abutting, the problem that the pressure on the upper and lower ends of the outer ring of the bearing is different in the prior art is well avoided.

[0019] As a specific improvement embodiment, the housing 1 is formed by bending a pipe into a C shape. The two ends of the pipe are arranged vertically opposite to each other, and the preloading cavity 4 is formed between the two ends. The upper top column 2 is arranged slidably in the upper end of the pipe, and the lower top column 3 is arranged slidably in the lower end of the pipe. Through the above structural arrangement, the structure of the housing 1 can be simply and effectively formed.

[0020] As a specific embodiment of the improvement, the elastic force providing device 5 includes an elastic spring 51 and a plurality of steering steel balls 52. The elastic spring 51 is coaxially disposed inside the vertical section of the housing 1. A plurality of the steering steel balls 52 are filled in the bent section of the housing 1 and are arranged side by side. The steering steel balls 52 are respectively abutted against the end portions of the elastic spring 51, the upper top column 2 and the lower top column 3, so as to transmit the elastic force of the elastic spring 51 to the upper top column 2 and the lower top column 3. Through the arrangement of the above structure, the elastic force of the elastic spring 51 can be effectively applied to the upper top column 2 and the lower top column 3 by the action of the steering steel balls 52, and the elastic force loss can be minimized.

[0021] As a specific embodiment of the improvement, a clamping edge is provided on the inner side wall of the end portion of the housing 1. Clamping platforms are provided at the opposite ends of the upper top column 2 and the lower top column 3. When the upper top column 2 descends to the maximum position and the lower top column 3 ascends to the maximum position, the clamping platforms are abutted against the clamping edge. Through the arrangement of the clamping platforms and the clamping edge, the maximum limiting effect can be achieved.

[0022] As a specific embodiment of the improvement, the elastic spring 51 includes an upper spring 511, a lower spring 512 and an elastic force adjusting column 513. The upper spring 511, the lower spring 512 and the elastic force adjusting column 513 are all disposed inside the vertical section of the housing 1. The upper end of the upper spring 511 is abutted against the steering steel ball 52, and the lower end of the upper spring 511 is connected to the upper end of the elastic force adjusting column 513. The upper end of the lower spring 512 is connected to the lower end of the elastic force adjusting column 513, and the lower end of the lower spring 512 is abutted against the steering steel ball 52. Through the arrangement of the above structure, the effect of adjusting the magnitude of the elastic force applied by the elastic spring 51 to the outside can be achieved by using the action of the elastic force adjusting column 513.

[0023] As a specific implementation of the improvement, the elastic adjustment column 513 includes a column sleeve 5131, an upper sliding column 5132, and a lower sliding column 5133. The column sleeve 5131 is coaxially fixed in the housing 1. A dual-axis motor 5134 is fixedly connected inside the column sleeve 5131. The two axes of the dual-axis motor 5134 are respectively coaxially sleeved with lead screws. The upper sliding column 5132 is slidably arranged inside the column sleeve 5131 and is located above the dual-axis motor 5134. The lower end of the upper sliding column 5132 is threadedly connected to the lead screw at the upper end of the dual-axis motor 5134. The upper end of the upper sliding column 5132 is fixedly connected to the upper spring 511. The lower sliding column 5133 is slidably arranged inside the column sleeve 5131 and is located below the dual-axis motor 5134. The lower end of the lower sliding column 5133 is threadedly connected to the lead screw at the lower end of the dual-axis motor 5134. The lower end of the lower sliding column 5133 is fixedly connected to the lower spring 512. Through the setting of the above structure, the sliding of the upper sliding column 5132 and the lower sliding column 5133 can be controlled by means of lead screw transmission, and then the effect of changing the elastic force can be achieved. Among them, in this embodiment, the upper sliding column 5132 and the lower sliding column 5133 are connected to the column sleeve 5131 by means of a slide rail to avoid axial rotation.

[0024] As a specific implementation of the improvement, fixed ring grooves are provided at the upper end of the upper sliding column 5132 and the lower end of the lower sliding column 5133. The lower end of the upper spring 511 and the upper end of the lower spring 512 are respectively embedded in the fixed ring grooves to be fixedly connected to the ends of the upper sliding column 5132 and the lower sliding column 5133. Through the setting of the fixed ring grooves, the fixed connection between the upper sliding column 5132 and the upper spring 511 and between the lower sliding column 5133 and the lower spring 512 can be simply and effectively realized.

[0025] As a specific implementation of the improvement, a detection groove 6 is provided at the upper end of the upper sliding column 5132. A detection column 7 is inserted into the detection groove 6. A connection disk 8 is coaxially fixed at the upper end of the detection column 7. The fixed ring groove is provided on the outer side wall of the connection disk 8. A conductive block is fixed at the lower end of the detection column 7. A variable resistance coil is coaxially fixed in the detection groove 6. The detection column 7 is inserted into the variable resistance coil, and the conductive block is in contact with the variable resistance coil and is energized with each other. Through the setting of the above structure, the detection of the applied elastic force can be effectively realized by using the variable resistance function of the variable resistance coil, and then the detection of the pressure applied to the outer ring of the bearing can be realized, so that the applied pressure can be better controlled during the test. At the same time, in this embodiment, a magnet is provided at the center of the conductive block, and a mutually repulsive magnet is provided at the bottom of the detection groove 6 to achieve a reset elastic force effect through the magnetic force of the two magnets. In this embodiment, the lower sliding column 5132 is adopted to have the same structure to further detect the pressure applied to the upper and lower end faces of the outer ring of the bearing.

[0026] In summary, for the fixing device of this embodiment, through the arrangement of the upper jack post 2, the lower jack post 3 and the elastic force providing device 5, a structure that can effectively provide the same pressure on the upper and lower end faces of the bearing outer ring can be provided, avoiding the problems in the prior art.

[0027] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A double outer ring bearing fixing device, comprising three preloading devices, and the three preloading devices are circumferentially distributed, characterized in that: The preloading device includes a housing (1), an upper ejector pin (2) and a lower ejector pin (3). A preloading cavity (4) is formed on the housing (1). The upper ejector pin (2) is arranged on the upper cavity wall of the preloading cavity (4) in a liftable manner, and the lower ejector pin (3) is arranged on the lower cavity wall of the preloading cavity (4) in a liftable manner. The upper ejector pin (2) and the lower ejector pin (3) have the same shape, size and structure, and are mutually cooperated to abut against the end faces at the upper and lower ends of the outer ring of the bearing. A elastic force providing device (5) is arranged in the housing (1), and the elastic force providing device (5) is linked with the upper ejector pin (2) and the lower ejector pin (3) to provide elastic force to the upper ejector pin (2) and the lower ejector pin (3) so as to provide preloading force; The housing (1) is formed by bending a pipe into a C shape. The two ends of the pipe are arranged vertically opposite to each other, and a preloading cavity (4) is formed between the two ends. The upper ejector pin (2) is slidably arranged in the upper end of the pipe, and the lower ejector pin (3) is slidably arranged in the lower end of the pipe; The elastic force providing device (5) includes an elastic spring (51) and a plurality of steering steel balls (52). The elastic spring (51) is coaxially arranged inside the vertical section of the housing (1). A plurality of the steering steel balls (52) are filled in the bent section of the housing (1) and are arranged side by side. The steering steel balls (52) are respectively abutted against the ends of the elastic spring (51) and the ends of the upper ejector pin (2) and the lower ejector pin (3) to transmit the elastic force of the elastic spring (51) to the upper ejector pin (2) and the lower ejector pin (3).

2. The double outer ring bearing fixing device according to claim 1, characterized in that: A clamping edge is arranged on the inner side wall of the end of the housing (1). Clamping platforms are arranged at the opposite ends of the upper ejector pin (2) and the lower ejector pin (3). When the upper ejector pin (2) descends to the maximum position and the lower ejector pin (3) ascends to the maximum position, the clamping platforms are abutted against the clamping edge.

3. The double outer ring bearing fixing device according to claim 2, characterized in that: The elastic spring (51) includes an upper spring (511), a lower spring (512) and an elastic force adjusting column (513). The upper spring (511), the lower spring (512) and the elastic force adjusting column (513) are all arranged inside the vertical section of the housing (1). The upper end of the upper spring (511) is abutted against the steering steel ball (52), the lower end of the upper spring (511) is connected with the upper end of the elastic force adjusting column (513), the upper end of the lower spring (512) is connected with the lower end of the elastic force adjusting column (513), and the lower end of the lower spring (512) is abutted against the steering steel ball (52).

4. The double outer ring bearing fixing device according to claim 3, characterized in that: The elastic adjustment column (513) includes a column sleeve (5131), an upper sliding column (5132) and a lower sliding column (5133). The column sleeve (5131) is coaxially fixed inside the housing (1). A dual-axis motor (5134) is fixedly connected inside the column sleeve (5131). The dual axes of the dual-axis motor (5134) are respectively coaxially sleeved with lead screws. The upper sliding column (5132) is slidably arranged inside the column sleeve (5131) and is located above the dual-axis motor (5134). The lower end of the upper sliding column (5132) is threadedly connected to the lead screw at the upper end of the dual-axis motor (5134). The upper end of the upper sliding column (5132) is fixedly connected to the upper spring (511). The lower sliding column (5133) is slidably arranged inside the column sleeve (5131) and is located below the dual-axis motor (5134). The lower end of the lower sliding column (5133) is threadedly connected to the lead screw at the lower end of the dual-axis motor (5134). The lower end of the lower sliding column (5133) is fixedly connected to the lower spring (512).

5. The double outer ring bearing fixing device according to claim 4, characterized in that: Fixing ring grooves are formed at the upper end of the upper sliding column (5132) and the lower end of the lower sliding column (5133). The lower end of the upper spring (511) and the upper end of the lower spring (512) are respectively embedded in the fixing ring grooves to be fixedly connected to the ends of the upper sliding column (5132) and the lower sliding column (5133).

6. The double outer ring bearing fixing device according to claim 5, characterized in that: A detection groove (6) is formed at the upper end of the upper sliding column (5132). A detection column (7) is inserted through the detection groove (6). A connection disc (8) is coaxially fixed at the upper end of the detection column (7). The fixing ring groove is formed on the outer side wall of the connection disc (8). A conductive block is fixed at the lower end of the detection column (7). A variable resistance coil is coaxially fixed inside the detection groove (6). The detection column (7) is inserted through the variable resistance coil, and the conductive block is in contact with the variable resistance coil and is electrically connected to each other.

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