Bearing axial thrust loading testing machine

Abstract

The utility model relates to a bearing axial thrust loading testing machine which comprises an axial thrust loading mechanism, the axial thrust loading mechanism comprises a base, a front supporting plate and a rear supporting plate, the front supporting plate and the rear supporting plate are fixed at two ends of the base, and at least two directional guide rods are vertically and fixedly arranged between the two supporting plates. The directional guide rod is provided with a pushing plate, a first pressing plate and a second pressing plate which are in relative sliding fit, the front end face of the pushing plate is fixedly provided with a pushing rod which extends out of the front supporting plate in a guiding mode, and the end portion of the pushing rod forms axial positioning on the outer ring of the bearing to be detected. The pressure-bearing end of the pressure sensor abuts against the front end face of the first pressing plate, and a pressure-bearing spring connected to the directional guide rods in a sleeving mode is arranged between the rear end face of the first pressing plate and the front end face of the second pressing plate in an abutting mode. A rotating screw shaft is positioned in the middle of the rear supporting plate, the second pressing plate slides along the directional guide rod and compresses the spring when rotating along with the screw shaft, axial thrust loading is achieved, and force application is stable and reliable.

Description

Technical Field

[0001] The utility model relates to the field of bearing tests, in particular to a bearing axial thrust loading test machine. Background Art

[0002] At present, in the existing bearing production and processing process, it is often necessary to conduct various tests on the bearings. Only after passing the tests can they be mass-produced or delivered for use. Among them, the bearing axial thrust loading test is an effective durability test item that can better reflect the performance and service life of the bearing. The existing bearing axial thrust loading equipment, such as the authorization announcement number CN203083796U published in the Chinese patent literature, the authorization announcement date is July 24, 2013, and the utility model name is an axial loading device for rolling bearings, which discloses a contact, a thrust plate, a thrust rod, a pressure sensor, a force measuring rod, a frame, a grip, a ferrule, a spring and a pressure regulating bolt. The applied axial load is measured by a pressure sensor, thereby solving the problem of the rough calculation of the axial force applied by the existing axial loading device. Although the above device can effectively realize the loading of axial force, it can be known from its public content and drawings that its force measuring rod is a relatively long single rod structure, and with a single spring structure, its load capacity of axial force is relatively limited, and when the force measuring rod is relatively long, its coaxiality requirement is relatively high, which makes it difficult to ensure effective coaxiality during assembly and use, affecting the stability of axial force. Therefore, it is necessary to improve the existing bearing axial thrust loading equipment. Summary of the invention

[0003] In order to overcome the above shortcomings, the purpose of the utility model is to provide a bearing axial thrust loading tester to the art, so as to solve the technical problems of the existing similar bearing axial loading equipment, such as limited load application capacity and poor structural stability leading to poor axial force stability. The purpose is achieved through the following technical solutions.

[0004] A bearing axial thrust loading tester, the tester comprises a frame, a power part installed on the frame to position the inner ring of the bearing to be tested and drive the inner ring to rotate, and an axial thrust loading mechanism installed on the frame to position the outer ring of the bearing to be tested and axially push the outer ring; it is characterized in that the axial thrust loading mechanism comprises a base, a front support plate and a rear support plate fixed at both ends of the base, the front support plate is parallel to the rear support plate, at least two directional guide rods are fixed between the front support plate and the rear support plate, and the directional guide rods are perpendicular to the front support plate and the rear support plate, the directional guide rods are provided with a push plate, a first pressure plate, and a second pressure plate that are relatively slidably matched, a push rod is fixed on the front end surface of the push plate, and the push rod guide extends out of the The front support plate and the end thereof are provided with a groove for axial positioning of the outer ring of the bearing to be tested, a pressure sensor is fixedly provided at the rear of the push plate, the pressure sensor is externally connected to a pressure display, the pressure-bearing end of the pressure sensor is against the front end face of the first pressure plate, and a pressure-bearing spring sleeved on each of the directional guide rods is tightly provided between the rear end face of the first pressure plate and the front end face of the second pressure plate; a rotating screw shaft is positioned in the middle of the rear support plate, and a screw hole seat is provided in the middle of the second pressure plate for threaded cooperation with the screw portion of the screw shaft, that is, the second pressure plate forms a guide sliding along the directional guide rod when rotating with the screw shaft, and the shaft end of the screw shaft is provided with a shaft connection portion for connecting an external handle or a motor. Through the above structure, multiple directional guide rods are used as guides, and multiple springs are used to transmit the axial thrust, so that the axial force is relatively stable and reliable, and the axial load capacity and scope of application are effectively improved.

[0005] The base is fixed with a positioning bracket for forming a rotational positioning for the screw end of the screw shaft, and a scale plate with a pressure scale value is fixed between the top of the positioning bracket and the top of the rear support plate. A slide groove is provided in the middle of the scale plate, and a sliding pointer is provided in the slide groove, and the pointer is fixed to the top of the second pressing plate, that is, when the second pressing plate slides along the directional guide rod, it drives the pointer to slide along the slide groove of the scale plate. Through this structure, the test machine has the dual functions of electronic indication of the pressure sensor and mechanical indication of the pointer and scale plate, so that it can be used for selective reference according to the actual axial thrust requirements, and the two are used in combination, with a better zeroing function, and more accurate and reliable use.

[0006] The upper end surface of the base is provided with a guide rail, and the bottoms of the push plate and the second pressing plate are fixedly provided with a sliding seat that is directional and slidably matched with the guide rail. Through this structure, the stability of the push plate and the second pressing plate in the axial movement along the directional guide rod is further improved.

[0007] The push plate, the first pressure plate, and the second pressure plate are all rectangular plates, and four directional guide rods are provided and distributed at four rectangular vertices of the push plate, the first pressure plate, and the second pressure plate. Through this structure, the stability and reliability of the push plate, the first pressure plate, and the second pressure plate in guiding and sliding along the fixed guide rods are ensured.

[0008] At least one limiting rod is vertically fixed between the front support plate and the rear support plate, and the limiting rod is in a guided sliding fit with the push plate, the first pressure plate, and the second pressure plate, and a limiting block is fixed on the limiting rod to limit the maximum stroke of the push plate and the second pressure plate. Through this structure, the pushing stroke of the push plate, the first pressure plate, and the second pressure plate is effectively limited.

[0009] The end of the push rod of the push plate is plugged with a detachable core rod, and the end of the core rod forms a position for the outer ring of the bearing to be tested. Through this structure, it is convenient to disassemble and replace the core rod when it is worn.

[0010] The power part includes a motor and a transmission box installed on the frame, a bearing seat is arranged in the transmission box, a rotating shaft is arranged in the bearing seat, and a transmission wheel, a front locking nut, a first angular contact bearing, a second angular contact bearing, a spring preload seat, a spring, a spring pressure ring, a third angular contact bearing, a fourth angular contact bearing, and a rear locking nut are arranged in sequence from the front end to the rear end of the rotating shaft, wherein an inner ring sleeve abutting against the inner ring and an outer ring sleeve abutting against the outer ring are arranged between the first angular contact bearing and the second hinge bearing and between the third angular contact bearing and the fourth hinge bearing, the outer rings of the first angular contact bearing, the second angular contact bearing, the third angular contact bearing, and the fourth angular contact bearing, as well as the spring preload seat, the spring pressure ring, and the outer ring sleeve are all positioned in the inner hole of the bearing seat, and the first angular contact bearing, the second angular contact bearing, the third angular contact bearing, and the fourth angular contact shaft The inner ring of the bearing and the inner ring sleeve are both positioned on the rotating shaft, wherein the outer ring of the second angular contact bearing is pressed against one end of the spring preload seat, and the other end of the spring preload seat is provided with a spring hole, one end of the spring is placed in the spring hole, and the other end of the spring is pressed against one side of the spring pressure ring, and the other side of the spring pressure ring is positioned on the bearing seat and isolated from the third angular contact bearing, and the front locking nut and the rear locking nut respectively form a locking limit for the inner ring end faces of the first angular contact bearing and the fourth hinged bearing, and the front end cover and the rear end cover are respectively fixed at both ends of the bearing seat, and the front end cover and the rear end cover respectively form a limit for the outer ring end faces of the first angular contact bearing and the fourth angular contact bearing; the transmission wheel at the front end of the rotating shaft and the output wheel of the motor are driven by a transmission belt, and the rear end of the rotating shaft forms an axial connection positioning with the inner ring of the bearing to be tested. Through this structure, the stability of the inner ring of the bearing to be tested driven to rotate when the power part is output is guaranteed, and the requirements of high speed and service life are met.

[0011] The rear end of the rotating shaft is connected to a detachable mandrel, and the end of the mandrel forms an axial connection with the inner ring of the bearing to be tested. With this structure, it is convenient to disassemble and replace the mandrel when it is worn.

[0012] The overall structure of the utility model is relatively stable and reliable, meets the higher axial thrust load requirements, is relatively convenient to use, has a wide range of applications, and is suitable for use as an axial thrust test device for various types of bearings, or for structural improvement of similar test devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] Figure 2 yes Figure 1 Schematic diagram of the internal structure of the axial thrust loading mechanism.

[0015] Figure 3 yes Figure 1 Schematic diagram of the internal structure of the transmission box of the power part.

[0016] The serial numbers and names in the figure are: 1, frame, 2, motor, 3, transmission box, 301, bearing seat, 302, rotating shaft, 303, front cover, 304, rear cover, 305, transmission wheel, 306, front locking nut, 307, first angular contact bearing, 308, inner ring sleeve, 309, outer ring sleeve, 310, second angular contact bearing, 311, spring preload seat, 312, spring, 313, spring pressure ring, 314, third angular contact bearing, 315, fourth angular contact bearing, 316, rear locking nut, 317, spindle, 4, axial thrust loading Mechanism, 401, base, 402, front support plate, 403, rear support plate, 404, push plate, 405, first pressure plate, 406, second pressure plate, 407, sliding seat, 408, guide rail, 409, core rod, 410, push rod, 411, pressure sensor, 412, pressure display, 413, directional guide rod, 414, pressure spring, 415, limit rod, 416, limit block, 417, screw hole seat, 418, screw, 419, shaft connection, 420, positioning bracket, 421, scale plate, 422, pointer part, 5, bearing to be tested. Implementation

[0017] The utility model is now further described with reference to the accompanying drawings.

[0018] like Figure 1 , Figure 2As shown, the bearing axial thrust loading tester includes a frame 1, a power part installed on the frame to position the inner ring of the bearing 5 to be tested and drive the inner ring to rotate, and an axial thrust loading mechanism 4 installed on the frame to position the outer ring of the bearing to be tested and axially push the outer ring. The axial thrust loading mechanism includes a base 401, a front support plate 402 and a rear support plate 403 fixed at both ends of the base, the front support plate and the rear support plate are both rectangular plates and are parallel to each other, and directional guide rods 413 are vertically fixed at the four top corners of the rectangular plate between the front support plate and the rear support plate, that is, four directional guide rods are formed that are centrally symmetrically distributed relative to the front support plate and the rear support plate, and the directional guide rods are provided with a push plate 404, a first pressure plate 405, and a second pressure plate 406 that are relatively slidably matched, the push plate, the first pressure plate, and the second pressure plate are rectangular plates, and a push rod 410 is vertically fixed on the front end surface of the push plate, and the push rod guide extends out of the front support plate and is connected to a detachable core rod 409 with a sleeve at the end, and a groove is provided at the end of the core rod for axial positioning of the outer ring of the bearing to be measured. A pressure sensor 411 is fixedly provided at the rear part of the above-mentioned push plate, and the pressure sensor is externally connected to a pressure display 4012. The pressure-bearing end of the pressure sensor is abutted against the front end face of the first pressure plate, and a pressure-bearing spring 414 sleeved on each directional guide rod is tightly provided between the rear end face of the first pressure plate and the front end face of the second pressure plate; a rotating screw shaft 418 is positioned in the middle part of the rear support plate, and a screw hole seat 417 that is threadedly matched with the screw part of the screw shaft is fixed in the middle part of the second pressure plate, that is, the second pressure plate forms a guided sliding along the directional guide rod when rotating with the screw shaft, and the shaft end of the screw shaft is provided with an axial connection part 419 for connecting an external handle or a motor.

[0019] The base 401 is fixed with a positioning bracket 420 for forming a rotational positioning for the screw end of the screw shaft 418, and a scale plate 421 with a pressure scale value is fixed between the top of the positioning bracket and the top of the rear support plate 403. A slide groove is provided in the middle of the scale plate, and a sliding pointer 422 is provided in the slide groove, and the pointer is fixed to the top of the second pressure plate 406, that is, when the second pressure plate slides along the directional guide rod 413, it drives the pointer to slide along the slide groove of the scale plate. This structure is mainly to achieve an intuitive display of two pressure values, in which the pointer indication is suitable for accurate display when the axial thrust is small, so there is no need to turn on the pressure sensor. The pressure sensor is suitable for use when higher axial thrust is required and precise pressure adjustment is required. In addition, the combination of the two can achieve zeroing operation.

[0020] Furthermore, a guide rail 408 is provided on the upper end surface of the base 401, and a sliding seat 407 which is directional and slidably matched with the guide rail is fixedly provided at the bottom of the push plate 404 and the second pressure plate 406, thereby improving the stability of the axial movement of the push plate and the second pressure plate along the directional guide rod 413.

[0021] Furthermore, in order to prevent the push plate 404 and the second pressure plate 406 from over-sliding, at least one limit rod 415 is vertically fixed between the front support plate 402 and the rear support plate 403. The limit rod is in guided sliding cooperation with the push plate, the first pressure plate 405 and the second pressure plate, and the limit rod is fixed with a limit block 416 for limiting the maximum stroke of the push plate and the second pressure plate.

[0022] like Figure 3 As shown, the power part of the testing machine includes a motor 2 and a transmission box 3 installed on a frame 1, a bearing seat 301 is arranged in the transmission box, a rotating shaft 302 is arranged in the bearing seat, and a transmission wheel 305, a front locking nut 306, a first angular contact bearing 307, a second angular contact bearing 310, a spring preload seat 311, a spring 312, a spring pressure ring 313, a third angular contact bearing 314, a fourth angular contact bearing 315, and a rear locking nut 316 are arranged in sequence from the front end to the rear end of the rotating shaft, wherein an inner ring sleeve 308 abutting against the inner ring and an outer ring sleeve 309 abutting against the outer ring are arranged between the first angular contact bearing and the second hinge bearing and between the third angular contact bearing and the fourth hinge bearing, the outer rings of the first angular contact bearing, the second angular contact bearing, the third angular contact bearing, and the fourth angular contact bearing, as well as the spring preload seat, the spring pressure ring, and the outer ring sleeve are all positioned in the inner hole of the bearing seat, and the first angular contact bearing and the second hinge bearing are provided with inner ring sleeves 308 abutting against the inner ring and outer ring sleeves 309 abutting against the outer ring. The inner rings of the bearing, the second angular contact bearing, the third angular contact bearing, and the fourth angular contact bearing, as well as the inner ring sleeve are all positioned on the rotating shaft, wherein the outer ring of the second angular contact bearing is pressed against one end of the spring preload seat, and the other end of the spring preload seat is provided with a spring hole, one end of the spring is placed in the spring hole, and the other end of the spring is pressed against one side of the spring pressure ring, and the other side of the spring pressure ring is positioned on the bearing seat and isolated from the third angular contact bearing, and the front locking nut and the rear locking nut respectively form locking limits on the inner ring end faces of the first angular contact bearing and the fourth hinged bearing, and the front end cover 303 and the rear end cover 304 are respectively fixed at both ends of the bearing seat, and the front end cover and the rear end cover respectively form limits on the outer ring end faces of the first angular contact bearing and the fourth angular contact bearing; the transmission wheel at the front end of the rotating shaft and the output wheel of the motor are driven by a transmission belt, and the rear end of the rotating shaft is plugged and fixed with a removable mandrel with a pin, and the end of the mandrel forms an axial connection positioning with the inner ring of the bearing to be measured.

[0023] The working method of the bearing axial thrust loading tester is as follows: the inner ring of the bearing 5 to be tested is mounted on the mandrel 317 at the end of the rotating shaft 302, and the screw shaft 418 of the axial thrust loading mechanism 4 is rotated to drive the second pressing plate 406 to move toward the rear support plate 403, thereby releasing the pressure spring 414, and manually operating the push plate 404 to move toward the rear support plate, so as to facilitate the alignment of the mandrel 409 at the end of the push rod 410 with the outer ring of the bearing to be tested. After the matching is completed, the screw shaft can be reversely operated to rotate, drive the second pressing plate to move toward the front support plate 402, and compress the pressure spring to provide axial thrust to the first pressing plate 405, and the first pressing plate transmits the thrust to the push plate through the pressure sensor 411, and the pressure display 412 and the pointer 422 on the scale plate 421 indicate the corresponding pressure value, until the screw shaft is stopped after the required axial pressure is pushed to achieve the desired axial thrust applied to the outer ring of the bearing to be tested. The motor 2 of the power part is turned on, the motor drives the shaft of the transmission box 3 to rotate, and the shaft drives the core shaft and the inner ring of the bearing to be tested to rotate, that is, the axial thrust loading test of the bearing to be tested is realized.

[0024] The above contents are intended to illustrate the technical means of the utility model, but not to limit the technical scope of the utility model. Those skilled in the art can make obvious improvements or substitutions to the utility model in combination with existing common knowledge, which also fall within the protection scope of the claims of the utility model.

Claims

1. A bearing axial thrust loading test machine, the test machine comprising a frame (1), a power part installed on the frame to position the inner ring of the bearing to be tested (5) and drive the inner ring to rotate, and an axial thrust loading mechanism (4) installed on the frame to position the outer ring of the bearing to be tested and axially push the outer ring; characterized in that The axial thrust loading mechanism (4) comprises a base (401), a front support plate (402) and a rear support plate (403) fixed at both ends of the base, the front support plate is parallel to the rear support plate, at least two directional guide rods (413) are fixedly arranged between the front support plate and the rear support plate, and the directional guide rods are perpendicular to the front support plate and the rear support plate, the directional guide rods are provided with a push plate (404), a first pressure plate (405), and a second pressure plate (406) that are relatively slidably matched, a push rod (410) is fixedly arranged on the front end surface of the push plate, the push rod guide extends out of the front support plate and has an end portion provided with a groove that is embedded in the outer ring of the bearing to be tested (5) to form an axial positioning, and the push plate A pressure sensor (411) is fixedly provided at the rear part, and the pressure sensor is externally connected to a pressure display (412). The pressure-bearing end of the pressure sensor abuts against the front end surface of the first pressure plate, and a pressure-bearing spring sleeved on each of the directional guide rods (413) is tightly provided between the rear end surface of the first pressure plate and the front end surface of the second pressure plate; a rotatable screw shaft (418) is positioned in the middle part of the rear support plate, and a screw hole seat (417) that is threadedly matched with the screw part of the screw shaft is provided in the middle part of the second pressure plate, that is, the second pressure plate forms a guided sliding along the directional guide rod when rotating with the screw shaft, and the shaft end of the screw shaft is provided with a shaft connection part (419) for connecting an external handle or a motor.

2. The bearing axial thrust loading tester according to claim 1, characterized in that The base (401) is fixedly provided with a positioning bracket (420) for rotationally positioning the screw end of the screw shaft (418); a scale plate (421) with pressure scale values ​​is fixedly provided between the top of the positioning bracket and the top of the rear support plate (403); a slide groove is provided in the middle of the scale plate, a slidably matched pointer member (422) is provided in the slide groove, and the pointer member is fixed to the top of the second pressure plate (406), that is, when the second pressure plate slides along the directional guide rod (413), the pointer member is driven to slide along the slide groove of the scale plate.

3. The bearing axial thrust loading tester according to claim 1, characterized in that The upper end surface of the base (401) is provided with a guide rail (408), and the bottoms of the push plate (404) and the second pressing plate (406) are both fixedly provided with a sliding seat (407) that is directional and slidably matched with the guide rail.

4. The bearing axial thrust loading tester according to claim 1, characterized in that The push plate (404), the first pressure plate (405), and the second pressure plate (406) are all rectangular plates, and four directional guide rods (413) are provided and distributed at four rectangular vertices relative to the push plate, the first pressure plate, and the second pressure plate.

5. The bearing axial thrust loading tester according to claim 1, characterized in that At least one limit rod (415) is vertically fixed between the front support plate (402) and the rear support plate (403), the limit rod is in guided sliding cooperation with the push plate (404), the first pressure plate (405), and the second pressure plate (406), and a limit block (416) for limiting the maximum travel of the push plate and the second pressure plate is fixed to the limit rod.

6. The bearing axial thrust loading tester according to claim 1, characterized in that The end of the push rod (410) of the push plate (404) is plugged into a detachable core rod (409), and the end of the core rod forms a positioning for the outer ring of the bearing (5) to be tested.

7. The bearing axial thrust loading tester according to claim 1, characterized in that The power part comprises a motor (2) and a transmission box (3) mounted on a frame (1); a bearing seat (301) is arranged in the transmission box; a rotating shaft (302) is arranged in the bearing seat; a transmission wheel (305), a front locking nut (306), a first angular contact bearing (307), a second angular contact bearing (310), a spring preload seat (311), a spring (312), a spring pressure ring (313), a third angular contact bearing (314), a fourth angular contact bearing (315), and a rear locking nut (316) are arranged in sequence from the front end to the rear end of the rotating shaft; an inner ring sleeve (308) abutting against the inner ring and an outer ring sleeve (309) abutting against the outer ring are arranged between the first angular contact bearing and the second hinge bearing and between the third angular contact bearing and the fourth hinge bearing; the outer rings of the first angular contact bearing, the second angular contact bearing, the third angular contact bearing, and the fourth angular contact bearing, as well as the spring preload seat, the spring pressure ring, and the outer ring sleeve are all positioned in the inner hole of the bearing seat. , the inner rings of the first angular contact bearing, the second angular contact bearing, the third angular contact bearing, and the fourth angular contact bearing, as well as the inner ring sleeve, are all positioned on the rotating shaft, wherein the outer ring of the second angular contact bearing is pressed against one end of the spring preload seat, the other end of the spring preload seat is provided with a spring hole, one end of the spring is placed in the spring hole, the other end of the spring is pressed against one side of the spring pressure ring, the other side of the spring pressure ring is positioned on the bearing seat and isolated from the third angular contact bearing, the front locking nut and the rear locking nut respectively form locking limits on the inner ring end faces of the first angular contact bearing and the fourth hinged bearing, the two ends of the bearing seat are respectively fixed with a front end cover (303) and a rear end cover (304), and the front end cover and the rear end cover respectively form limits on the outer ring end faces of the first angular contact bearing and the fourth angular contact bearing; the transmission wheel at the front end of the rotating shaft and the output wheel of the motor are driven by a transmission belt, and the rear end of the rotating shaft forms an axial connection positioning with the inner ring of the bearing to be tested (5).

8. The bearing axial thrust loading tester according to claim 7, characterized in that The rear end of the rotating shaft (302) is connected to a detachable core shaft (317), and the end of the core shaft forms an axial connection positioning with the inner ring of the bearing to be tested (5).

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