CN116973110A

CN116973110A - Hub bearing test equipment and loading offset adjustment method

Info

Publication number: CN116973110A
Application number: CN202311215408.6A
Authority: CN
Inventors: 范围广; 方静; 许凯; 许林芳; 张霞; 陆筱艾
Original assignee: Wanxiang Qianchao Co Ltd
Current assignee: Wanxiang Qianchao Co Ltd
Priority date: 2023-09-20
Filing date: 2023-09-20
Publication date: 2023-10-31

Abstract

The invention relates to the field of bearing performance tests, in particular to hub bearing test equipment and a loading offset adjustment method. Mainly comprises the following steps: the base is positioned above the bottom plate of the testing machine, and the rotating device is fixedly arranged on the upper surface of the base; the sliding device comprises an air floatation guide rail and a moving unit, wherein the sliding rail unit is fixedly connected with the upper surface of the bottom plate of the testing machine, and the sliding block unit is fixedly connected with the lower surface of the base; the gear set is positioned above the rack; the first gear is positioned above the second gear, and the second gear is positioned above the rack; the rack is fixedly arranged on the upper surface of the bottom plate of the testing machine, the first gear is fixedly connected with the base, the second gear is fixedly connected with the base, the first gear is meshed with the second gear, and the second gear is meshed with the rack; the transmission ratio of the first gear to the second gear is greater than or equal to 1.5. Thus, the problems that the existing performance test equipment is difficult to debug and the adjustment accuracy of the force loading point position is poor are solved.

Description

Hub bearing test equipment and loading offset adjustment method

Technical Field

The invention relates to the field of bearing performance tests, in particular to hub bearing test equipment and a loading offset adjustment method.

Background

The automobile hub bearing unit is one of key parts of an automobile chassis, and mainly aims to bear the weight of the whole automobile and accurately guide the rotation of a hub, and the running state of a hub bearing directly influences the whole transmission system, so that the running reliability of the automobile is influenced. This requires that the hub bearing is capable of bearing not only axial but also radial loads, while tightness is also a requirement. Therefore, after the processing is completed, the hub bearing needs to be tested to detect the fatigue resistance and the sealing performance of the hub bearing. The current common method is to apply axial load and radial load to the hub bearing while the hub bearing rotates at high speed, then to configure a mud water splashing system, and to collect related data such as the rotational speed of the hub bearing, the applied radial load force and the axial load force for judgment. Since the hub bearing is applied to different vehicle models and specifications, the difference in tire size also results in a difference in the axial force loading radius R and the radial force loading offset ET, so that the axial load and the radial load actually applied to the hub bearing will also be different.

When the axial force loading radius and the radial force loading offset are adjusted, the conventional hub bearing test equipment generally keeps a base, a rotating motor, a rotating main shaft system and the like fixed, and adjusts the axial force loading radius and the radial force loading offset by moving a force loading device with lighter weight. Because the installation space of the force loading device is small, and the force loading device is required to be moved up and down and left and right so as to adjust the force loading point to a proper position, the equipment is difficult to debug, and the accuracy of the adjusted force loading point position is difficult to ensure.

Disclosure of Invention

The invention provides hub bearing test equipment and a loading offset adjustment method, which are used for solving the problems that the existing performance test equipment is difficult to debug and the accuracy of adjusting a force loading point position is poor.

In a first aspect, the present invention provides a hub bearing testing apparatus comprising: the testing machine comprises a main body frame, a base, a sliding device and a rotating device;

the main body frame of the testing machine comprises a testing machine bottom plate, the base is positioned above the testing machine bottom plate, and the rotating device is fixedly arranged on the upper surface of the base;

the sliding device comprises an air-float guide rail and a moving unit, wherein the air-float guide rail comprises a slide rail unit and a slide block unit, the slide rail unit is fixedly connected with the upper surface of a bottom plate of the testing machine, the slide block unit is fixedly connected with the lower surface of the base, and the slide rail unit is in sliding connection with the slide block unit;

the moving unit comprises a gear set and a rack, and the gear set is positioned above the rack;

the gear set comprises a first gear and a second gear, the first gear is positioned above the second gear, and the second gear is positioned above the rack; the rack is fixedly arranged on the upper surface of the bottom plate of the testing machine, the first gear is fixedly connected with the base, the second gear is fixedly connected with the base, the first gear is meshed with the second gear, and the second gear is meshed with the rack;

The transmission ratio of the first gear to the second gear is greater than or equal to 1.5.

In some embodiments, the base comprises a first panel, a rib plate and a second panel, wherein the first panel is fixedly connected with the upper surface of the rib plate, the lower surface of the rib plate is fixedly connected with the upper surface of the second panel, and the rib plate is obliquely arranged relative to the first panel;

the first gear is fixedly connected with the front side surface of the rib plate, and the second gear is fixedly arranged with the front side surface of the rib plate;

the tooth space of the first gear is 2 mm-15 mm.

In some embodiments, the base is removably threaded with the testing machine base plate;

the base is provided with n first through holes;

the bottom plate of the testing machine is provided with m first T-shaped grooves, q first connecting pieces are arranged in the first T-shaped grooves, first protruding parts are arranged on the first connecting pieces along the bottoms of the first connecting pieces, first threaded holes are formed in the first protruding parts, and the first threaded holes are matched with the first through holes;

the bottom of the first connecting piece is positioned in the first T-shaped groove, and the front side surface of the first protruding part is contacted with the front side surface of the opening of the first T-shaped groove; the rear side surface of the first protruding part is contacted with the rear side surface of the opening of the first T-shaped groove;

Wherein n, m and q are any natural number greater than 1.

In some embodiments, the sliding rail unit comprises a first sliding rail and a second sliding rail, the sliding block unit comprises a first sliding block and a second sliding block, the first sliding rail is in sliding connection with the first sliding block, and the second sliding rail is in sliding connection with the second sliding block;

the first sliding rail is parallel to the second sliding rail relative to the front end face of the bottom plate, the rack is located between the first sliding rail and the second sliding rail, and the rack is parallel to the first sliding rail.

In some embodiments, the mobile unit further comprises a crank fixedly connected to the first gear;

the center of the first gear is provided with a first mounting hole, and the vertical distance L5 from the first mounting hole to the bottom plate of the testing machine is as follows: l5 is more than 1m and less than or equal to 1.2m.

In some embodiments, the testing machine main body frame further comprises a testing machine support, the testing machine support comprises a testing machine top plate, a first support plate, a second support plate, a third support plate and a fourth support plate, the upper end face of the first support plate is fixedly connected with the front end face of the testing machine top plate, and the lower end face of the first support plate is fixedly connected with the upper end face of the testing machine bottom plate;

The upper end face of the second support plate is fixedly connected with the rear end face of the top plate of the testing machine, and the lower end face of the second support plate is fixedly connected with the upper end face of the bottom plate of the testing machine;

the upper end face of the third support plate is fixedly connected with the left end face of the top plate of the testing machine, and the lower end face of the third support plate is connected with the upper end face of the bottom plate of the testing machine;

the upper end face of the fourth support plate is fixedly connected with the right end face of the top plate of the testing machine, and the lower end face of the fourth support plate is connected with the upper end face of the bottom plate of the testing machine;

the fourth support plate is provided with a first opening, and the distance L1 from the front side surface of the first opening to the rear side surface of the first opening is larger than the horizontal distance L2 from the front end surface of the base to the rear end surface of the base;

the vertical distance L3 from the upper side surface of the first opening to the upper end surface of the bottom plate of the testing machine is larger than the vertical distance L from the upper end surface of the bottom plate of the testing machine to the upper end surface of the rotating device.

In some embodiments, the hub bearing test apparatus further comprises a force loading device, the force loading device comprises a loading unit, a fixed bracket and a screw lifting device, the screw lifting device is fixedly installed above the fixed bracket, the fixed bracket is positioned on the right side of the fourth support plate, and the fixed bracket is detachably connected with the fourth support plate through threads;

The loading unit comprises an axial force loading cylinder and a radial force loading cylinder, the axial force loading cylinder is positioned at the lower end part of the fixed bracket, the radial force loading cylinder is positioned at the right end part of the fixed bracket, and the force loading direction of the axial force loading cylinder is perpendicular to the force loading direction of the radial force loading cylinder;

the fixing support comprises a first fixing plate, and a second fixing plate and a third fixing plate extend rightwards along the vertical direction of the first fixing plate;

the rear side of the right end part of the second fixed plate is fixedly connected with the front side of the radial force loading cylinder, the rear side of the radial force loading cylinder is fixedly connected with the front side of the third fixed plate, and the right side of the lower end part of the first fixed plate is fixedly provided with the radial force loading cylinder.

In some embodiments, the fixing bracket has i second through holes; the fourth support plate is provided with j second T-shaped grooves, k second connecting pieces are arranged in the second T-shaped grooves, second protruding parts are arranged along the bottoms of the second connecting pieces, the second protruding parts are provided with second threaded holes, and the second threaded holes are matched with the second through holes; the bottom of the second connecting piece is positioned in the second T-shaped groove, and the front side surface of the second protruding part is contacted with the front side surface of the opening of the second T-shaped groove; the rear side surface of the second protruding part is contacted with the rear side surface of the opening of the second T-shaped groove;

Wherein i, j and k are any natural number greater than 1.

In some embodiments, the hub bearing test device further comprises an L-shaped loading arm and a connecting device, wherein the L-shaped loading arm comprises a first connecting plate, a second connecting plate and a third connecting plate, the front end surface of the right end part of the first connecting plate is fixedly connected with the upper end part of the second connecting plate, and the rear end surface of the right end part of the first connecting plate is fixedly connected with the upper end part of the third connecting plate;

the bottom of the connecting device is in sliding connection with the first connecting plate;

the connecting device extends upwards along the upper end surface of the bottom of the connecting device to form a connecting part, the connecting part is fixedly connected with the right end part of the axial force loading cylinder, and the connecting part is fixedly connected with the lower end part of the radial force loading cylinder;

the connection has a joint force loading center.

In some embodiments, the lead screw lifting device comprises a lead screw, a turntable, and a connection assembly; the connecting component is positioned below the screw rod and fixedly arranged at the upper end part of the fixed bracket;

the upper end part of the fourth support plate vertically extends rightward along the right side surface of the fourth support plate to form an extending end, and the extending end is positioned above the fixed support;

The upper end part of the screw rod penetrates through the extending end to be connected with the turntable, and the lower end part of the screw rod is connected with the connecting assembly in a screwing way;

the connecting assembly comprises a shell and a screw nut, wherein the front side surface of the shell is fixedly connected with the rear side surface of the upper end part of the second fixing plate, the rear side surface of the shell is fixedly connected with the front side surface of the upper end part of the third fixing plate, and the shell is sleeved outside the screw nut.

In a second aspect, the present invention provides a load offset adjustment method, including:

s11, fixedly connecting an axial force loading cylinder with a connecting device, and fixedly connecting a radial force loading cylinder with the connecting device;

step S12, loosening the fixed support and the fourth support plate, and enabling the force loading device to move to a first set position by means of up-and-down movement of the screw lifting device with power loading device, so that the fixed support and the fixed plate are fastened;

step S13, mounting a bearing sample at the right end part of the rotating device, mounting a first connecting disc at the right end part of the bearing sample, and mounting an L-shaped loading arm at the right end part of the first connecting disc;

step S14, loosening the base and the bottom plate of the testing machine, inflating the air-float guide rail, and swinging the crank according to a first rotating speed to realize the left-right movement of the base, so as to roughly adjust the moving distance of the base; the crank is rocked according to the second rotation speed to finely adjust the moving distance of the base, the base is moved to a second set position, and the base and the bottom plate of the testing machine are fastened;

Step S15, fastening the first connecting disc and the L-shaped loading arm, and fastening the connecting device and the L-shaped loading arm;

and S16, performing a test.

In order to solve the problems of difficult debugging and poor accuracy of adjusting the force loading point position of the traditional performance test equipment, the invention has the following advantages:

1. the hub bearing test equipment can comprise a main body frame of the tester, a base, a sliding device and a rotating device. Through setting up air supporting guide rail and mobile unit, can make the base carry out air supporting slip, the cooperation of rethread gear train and rack can make the base can the whole removal to adjust radial force load offset until meeting test requirement. In addition, through the cooperation of air supporting guide rail and mobile unit, can remove the base more easily, saved the manpower.

2. By arranging the first gear to be meshed with the second gear, the second gear is meshed with the rack, and the second gear can be driven to move on the rack through the first gear. The first gear and the second gear of the gear set are further arranged, the transmission ratio of the first gear and the second gear of the gear set is larger than or equal to 1.5, when the first gear rotates one tooth, the base moves by a distance of one tooth space in the left-right direction, the transmission mode of the large gear is driven by the small gear, the moving precision of the base is improved, and the accuracy of adjusting the force loading point position is improved.

Drawings

FIG. 1 illustrates a schematic diagram of a hub bearing testing apparatus of an embodiment;

FIG. 2 illustrates a top view of a hub bearing testing apparatus of an embodiment;

FIG. 3 illustrates a partial schematic view of a hub bearing test apparatus mobile unit of one embodiment;

FIG. 4 illustrates a partial schematic view of an L-shaped load arm of a hub bearing testing apparatus of one embodiment;

FIG. 5 illustrates a partial schematic view of a hub bearing testing apparatus force loading device of an embodiment;

FIG. 6 illustrates a flow diagram of a load offset adjustment method of one embodiment.

Reference numerals: 01 a rotating device; 11 motors; 12 a rotating spindle system; 02, a base; a first panel 21; 22 rib plates; a second panel 23; 03 a tester main body frame; 31 a tester rack; 311 first support plates; 312 a second support plate; 313 a third support plate; 314 a fourth support plate; 315 extending end; 32 a bottom plate of the testing machine; 04 balancing cushion blocks; 05 a sliding device; 51 air-float guide rail; 511 a slide rail unit; 5111 a first slide rail; 5112 a second slide rail; 512 slider units; 5121 a first slider; 5122 a second slider; 52 moving the unit; a 521 gear set; 5211 first gear; 5212 a second gear; 5213 fixing holes; 522 racks; 523 crank; 06L-shaped loading arm; 61 a first connection plate; 62 a third connection plate; 63 connection means; 07 force loading means; 71 a loading unit; 711 axial force loading cylinder; 712 radial force loading cylinders; 72 a screw lifting device; 721 to connect the components; 7211 screw; 7212 a housing; 722 lead screw; 723 turntable; 73 fixing a bracket; 731 first fixing plate; 732 third fixation plate.

Detailed Description

The disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those of ordinary skill in the art to better understand and thus practice the present disclosure, and are not meant to imply any limitation on the scope of the present disclosure.

As used herein, the term "comprising" and variants thereof are to be interpreted as meaning "including but not limited to" open-ended terms. The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment. The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "transverse", "longitudinal", etc. refer to an orientation or positional relationship based on that shown in the drawings. These terms are only used to better describe the present application and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations. Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present application will be understood by those of ordinary skill in the art according to the specific circumstances. Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances. Furthermore, the terms "first," "second," and the like, are used primarily to distinguish between different devices, elements, or components (the particular species and configurations may be the same or different), and are not used to indicate or imply the relative importance and number of devices, elements, or components indicated. Unless otherwise indicated, the meaning of "a plurality" is two or more.

The embodiment discloses a hub bearing test apparatus, as shown in fig. 1, 2 and 3, may include: the testing machine comprises a main body frame 03, a base 02, a sliding device 05 and a rotating device 01;

the tester main body frame 03 comprises a tester bottom plate 32, a base 02 is positioned above the tester bottom plate 32, and a rotating device 01 is fixedly arranged on the upper surface of the base 02;

the sliding device 05 comprises an air-float guide rail 51 and a moving unit 52, the air-float guide rail 51 comprises a slide rail unit 511 and a slide block unit 512, the slide rail unit 511 is fixedly connected with the upper surface of the bottom plate 32 of the testing machine, the slide block unit 512 is fixedly connected with the lower surface of the base 02, and the slide rail unit 511 is in sliding connection with the slide block unit 512;

the moving unit 52 includes a gear set 521, a rack 522, the gear set 521 being located above the rack 522;

the gear set 521 includes a first gear 5211, a second gear 5212, the first gear 5211 being above the second gear 5212, the second gear 5212 being above the rack 522; the rack 522 is fixedly arranged on the upper surface of the bottom plate 32 of the testing machine, the first gear 5211 is fixedly connected with the base 02, the second gear 5212 is fixedly connected with the base 02, the first gear 5211 is meshed with the second gear 5212, and the second gear 5212 is meshed with the rack 522;

The ratio of first gear 5211 to second gear 5212 is greater than or equal to 1.5.

In this embodiment, when the bearing sample is tested by the hub bearing test apparatus, the bearing sample can be rotated at a high speed and an axial load and a radial load can be applied to the bearing sample. As shown in fig. 1, a hub bearing testing apparatus may include a tester main body frame 03, a base 02, a sliding device 05, and a rotating device 01. The tester body frame 03 may include a tester floor 32. The base 02 may be disposed above the tester base plate 32, and the fixed rotating device 01 may be mounted above the base 02. The rotating device 01 can be used to rotate the bearing sample at a high speed. In other embodiments, the tester main body frame 03 and the base 02 can be made of steel frame structures, so that the strength is higher, and the hub bearing testing equipment can be stronger. The sliding device 05 may include an air rail 51, a moving unit 52. As shown in fig. 2, the air rail 51 may include a slide rail unit 511 and a slider unit 512. The slide rail unit 511 may be fixedly mounted on the upper surface of the tester base plate 32, the slider unit 512 may be fixedly mounted on the lower surface of the base 02, and the slide rail unit 511 and the slider unit 512 may be slidably connected. As shown in fig. 3, the mobile unit 52 may include a gear set 521, a rack 522. Gear set 521 may be located above rack 522 and gear set 521 may include a first gear 5211, a second gear 5212. The first gear 5211 can be positioned above the second gear 5212, the second gear 5212 can be positioned above the rack 522, and the rack 522 can be fixedly mounted to the upper surface of the tester base plate 32. First gear 5211 can be fixedly connected with base 02, second gear 5212 can be fixedly connected with base 02, first gear 5211 can be meshed with second gear 5212, and second gear 5212 can be meshed with rack 522. By providing the air-floating rail 51 and the moving unit 52, the base 02 can be made air-floating slid. And then the base 02 is fixedly connected with the slide block unit 512 and the gear set 521, the first gear 5211 is meshed with the second gear 5212, the second gear 5212 is meshed with the rack 522, and the second gear 5212 can be driven to move on the rack 522 through the first gear 5211, so that the base 02 can integrally move on the slide rail unit 511 by utilizing the gear set 521 to move on the rack 522, and the radial force load offset ET is adjusted until the radial force load offset ET meets test requirements. In some embodiments, the rotating device 01 may include the motor 11 and the rotating spindle system 12, and the base 02 may be easily moved by the cooperation of the air rail 51 and the moving unit 52 due to the large overall weight of the rotating device 01, thereby saving labor. The transmission ratio of the first gear 5211 to the second gear 5212 can be greater than or equal to 1.5, and the pinion drives the large gear to rotate, so that the moving precision of the base can be improved.

In some embodiments, the transmission ratio of the first gear 5211 to the second gear 5212 may be 1.5, and by making the number of teeth Z2 of the second gear 5212 equal to 1.5 times the number of teeth Z1 of the first gear 5211, that is, z2=z1×1.5, the second gear 5212 may be rotated one and a half times as many times as the first gear 5211. When the second gear 5212 rotates one turn, the mount 02 moves a distance X1 on the rack 522. Taking the radial force load to be adjusted and the loading offset distance ET value being 2 times of X1 as an example, the first gear 5211 can be rapidly rotated for three circles to drive the base 02 to move, and then the first gear 5211 is slowly rotated clockwise or anticlockwise to move the base 02 to a proper position, so that the moving precision of the base 02 is improved.

In some embodiments, the transmission ratio of the first gear 5211 to the second gear 5212 may be 2, and by making the number of teeth Z2 of the second gear 5212 equal to 2 times the number of teeth Z1 of the first gear 5211, that is, z2=z1×2, the second gear 5212 can rotate one turn when the first gear 5211 rotates two turns, so as to improve the moving precision of the base. Taking the radial force load to be adjusted and the loading offset distance ET value being 2 times of X1 as an example, the first gear 5211 can be rapidly rotated for four circles to drive the base 02 to move, and then the first gear 5211 is slowly rotated clockwise or anticlockwise to move the base 02 to a proper position, so that the moving precision of the base 02 is improved.

In some embodiments, when the radial force load offset ET to be adjusted is small, taking the radial force load offset ET as 0.5 times the radial force load offset X1 as an example, the transmission ratio of the first gear 5211 to the second gear 5212 may be 5, and the second gear 5212 may be rotated five times by making the number of teeth Z2 of the second gear 5212 equal to 5 times the number of teeth Z1 of the first gear 5211, that is, z2=z1×5. That is, at this time, the first gear 5211 can be rotated by two and a half turns rapidly, and then the first gear 5211 is rotated slowly in the clockwise or counterclockwise direction, so that the base 02 is moved to a proper position, and the moving precision of the base 02 is improved.

In some embodiments, when the radial force load offset ET to be adjusted is small, taking the radial force load offset ET as 0.2 times the radial force load offset X1 as an example, the transmission ratio of the first gear 5211 to the second gear 5212 may be 10, and ten rotations of the second gear 5212 may be performed by making the number of teeth Z2 of the second gear 5212 equal to 10 times the number of teeth Z1 of the first gear 5211, that is, z2=z1×10. That is, at this time, the first gear 5211 can be first rotated twice rapidly, and then the first gear 5211 is slowly rotated clockwise or counterclockwise, so that the base 02 is moved to a suitable position, and the movement accuracy of the base 02 is improved.

In some embodiments, as shown in fig. 1, the base 02 includes a first panel 21, a rib 22, and a second panel 23, where the first panel 21 is fixedly connected to an upper surface of the rib 22, and a lower surface of the rib 22 is fixedly connected to an upper surface of the second panel 23, and the rib 22 is obliquely arranged with respect to the first panel 21;

the first gear 5211 is fixedly connected with the front side surface of the rib plate 22, and the second gear 5212 is fixedly arranged with the front side surface of the rib plate 22;

the first gear 5211 has a tooth spacing of 2mm to 15mm.

In this embodiment, as shown in fig. 1, the base 02 may include a first panel 21, a rib 22, and a second panel 23. The first panel 21 may be disposed above the second panel 23. The rib 22 may be disposed between the first panel 21 and the second panel 23 obliquely with respect to the first panel 21. The upper surface of the rib plate 22 can be fixedly connected with the first panel 21, and the lower surface of the rib plate 22 can be fixedly connected with the upper surface of the second panel 23. The first gear 5211 can be fixedly connected to the front side of the rib 22, and the second gear 5212 can be fixedly connected to the front side of the rib 22. The base 02 may be fixedly provided with the slider unit 512, that is, the lower surface of the second panel 23 of the base 02 may be fixedly provided with the slider unit 512, and when the first gear 5211 drives the second gear 5212 to move on the rack 522, the second panel 23 may be driven to move back and forth on the slide rail unit 511 integrally. Through second panel 23 and floor 22 fixed connection, floor 22 and first panel 21 fixed connection, first panel 21, floor 22, second panel 23 can reach the effect of whole linkage, so when driving second panel 23 through gear train 521 and remove, base 02 wholly can wholly reciprocate on slide rail unit 511. By adding the rib 22 between the upper and lower sides of the base 02, the strength of the connection of the base 02 can be improved while facilitating the installation of the gear set 521. The tooth pitch of the first gear 5211 may be 2mm to 15mm, and when the first gear 5211 rotates the tooth pitch of one tooth, the base 02 can be moved in the left-right direction by the tooth pitch of one tooth, thereby improving the moving accuracy of the base 02.

In some embodiments, the tooth pitch of the first gear 5211 may be 2mm, and when the first gear 5211 rotates by 2mm, the base 02 may be moved in the left-right direction by 2mm, improving the moving accuracy of the base 02.

In some embodiments, the tooth pitch of the first gear 5211 may be 6mm, and when the first gear 5211 rotates by 6mm, the base 02 may be moved in the left-right direction by 6mm, improving the moving accuracy of the base 02. In some embodiments, the tooth pitch of the first gear 5211 may be 10mm, and when the first gear 5211 rotates 10mm, the base 02 may be moved in the left-right direction by 10mm, improving the moving accuracy of the base 02.

In some embodiments, the tooth pitch of the first gear 5211 may be 15mm, and when the first gear 5211 rotates 15mm, the base 02 may be moved 15mm in the left-right direction, improving the moving accuracy of the base 02.

In some embodiments, as shown in FIG. 1, the base 02 is removably threaded with the testing machine base plate 32;

the base 02 has n first through holes;

the testing machine bottom plate 32 is provided with m first T-shaped grooves, q first connecting pieces are arranged in the first T-shaped grooves, first protruding parts are arranged on the first connecting pieces along the bottoms of the first connecting pieces, first threaded holes are formed in the first protruding parts, and the first threaded holes are matched with the first through holes;

The bottom of the first connecting piece is positioned in the first T-shaped groove, and the front side surface of the first protruding part is contacted with the front side surface of the opening of the first T-shaped groove; the rear side surface of the first bulge part is contacted with the rear side surface of the opening of the first T-shaped groove;

wherein n, m and q are any natural number greater than 1.

In this embodiment, as shown in fig. 1, the base 02 and the tester base plate 32 can be detachably connected together by providing a plurality of first T-shaped grooves, a plurality of first connecting members, and a plurality of first through holes. When the base 02 moves relative to the bottom plate 32 of the testing machine, and the radial force load loading offset distance ET is adjusted until the radial force load loading offset distance ET meets the testing requirements, the base 02 stops moving, and at the moment, a bolt can pass through the first through hole to be in threaded connection with the first threaded hole of the first connecting piece, so that the base 02 and the bottom plate 32 of the testing machine are fixed together. If the radial force load offset ET needs to be adjusted, the bolts between the base 02 and the bottom plate 32 of the testing machine can be detached, the base 02 is moved, at the moment, the bolts and the first connecting piece are in a loose fit state, and the base 02 can be driven to move through the sliding device 05, so that the distance between the wheel center line of the bearing sample and the force loading device 07 is adjusted to reach the radial force load offset ET meeting the test requirement, the bolts and the first connecting piece are fastened together, the base 02 and the bottom plate 32 of the testing machine are fixed together, the adjusting mode is convenient and rapid, and the fixing between the base 02 and the bottom plate 32 of the testing machine can be realized when the base 02 moves to any position.

In some embodiments, the number of the first through holes may be 4, the bottom plate 32 of the testing machine has 2 first T-shaped grooves, the first T-shaped grooves are internally provided with 4 first connectors, the 2 first T-shaped grooves are respectively provided with 2 first connectors, the bolts can pass through the first through holes to be in threaded connection with the first connectors, and when the bolts are in a fastening state, the base 02 and the bottom plate 32 of the testing machine can be fixedly connected together; when the bolts are in a loose-fitting state, the base 02 can be moved left and right with respect to the tester base plate 32.

In some embodiments, the number of the first through holes may be 6, and 3 first connectors may be respectively arranged in the 2 first T-shaped grooves, so as to improve the connection strength between the base 02 and the bottom plate 32 of the testing machine.

In some embodiments, as shown in fig. 2, the slide rail unit 511 includes a first slide rail 5111 and a second slide rail 5112, the slide rail unit 512 includes a first slide block 5121 and a second slide block 5122, the first slide rail 5111 is slidably connected with the first slide block 5121, and the second slide rail 5112 is slidably connected with the second slide block 5122;

the first sliding rail 5111 is parallel to the second sliding rail 5112 with respect to the front end surface of the bottom plate, the rack 522 is located between the first sliding rail 5111 and the second sliding rail 5112, and the rack 522 is parallel to the first sliding rail 5111.

In the present embodiment, as shown in fig. 2, the slide rail unit 511 may include a first slide rail 5111 and a second slide rail 5112, and the slider unit 512 may include a first slider 5121 and a second slider 5122. The first slide rail 5111 is slidably connected to the first slider 5121, and the second slide rail 5112 is slidably connected to the second slider 5122. The first sliding rail 5111 may be parallel to the second sliding rail 5112 with respect to the front end surface of the bottom plate, the first sliding rail 5111 and the second sliding rail 5112 may be separately disposed on two sides of the rack 522, and the first sliding rail 5111, the second sliding rail 5112, and the rack 522 may be parallel disposed on the bottom plate. By providing two slide rails parallel to the rack 522 and two sliders for cooperation, the air rail 51 can be prevented from obstructing the moving unit 52, and the base 02 can be ensured to move smoothly.

In some embodiments, as shown in fig. 3, the mobile unit 52 further includes a crank 523, the crank 523 being fixedly coupled to the first gear 5211;

the center of the first gear 5211 is provided with a first mounting hole, and the vertical distance L5 from the first mounting hole to the tester base plate 32 is: l5 is more than 1m and less than or equal to 1.2m.

In this embodiment, as shown in fig. 3, the center of the first gear 5211 may include a first mounting hole, which may be used to mount the crank 523. The crank 523 can be fixedly connected with the first gear 5211, and can be used for shaking the first gear 5211, so that labor is saved. The crank 523 is fixedly installed in the first installation hole, the vertical distance L5 from the first installation hole to the bottom plate 32 of the testing machine can be set in the range of 1 m-1.2 m, the rotation center line of the crank 523 can be located in the height range of 1 m-1.2 m, and an operator can shake when standing, so that the operation is convenient.

In some embodiments, as shown in fig. 2, the main body frame 03 of the testing machine further comprises a testing machine bracket 31, the testing machine bracket 31 comprises a testing machine top plate, a first support plate 311, a second support plate 312, a third support plate 313 and a fourth support plate 314, the upper end surface of the first support plate 311 is fixedly connected with the front end surface of the testing machine top plate, and the lower end surface of the first support plate 311 is fixedly connected with the upper end surface of the testing machine bottom plate 32;

the upper end surface of the second support plate 312 is fixedly connected with the rear end surface of the top plate of the testing machine, and the lower end surface of the second support plate 312 is fixedly connected with the upper end surface of the bottom plate 32 of the testing machine;

the upper end surface of the third support plate 313 is fixedly connected with the left end surface of the top plate of the testing machine, and the lower end surface of the third support plate 313 is connected with the upper end surface of the bottom plate 32 of the testing machine;

the upper end surface of the fourth support plate 314 is fixedly connected with the right end surface of the top plate of the testing machine, and the lower end surface of the fourth support plate 314 is connected with the upper end surface of the bottom plate 32 of the testing machine;

the fourth support plate 314 has a first opening, and a distance L1 from a front side surface of the first opening to a rear side surface of the first opening is greater than a horizontal distance L2 from a front end surface of the base 02 to a rear end surface of the base 02;

the vertical distance L3 from the upper side of the first opening to the upper end face of the tester base plate 32 is greater than the vertical distance L4 from the upper end face of the tester base plate 32 to the upper end face of the rotating device 01.

In this embodiment, as shown in fig. 2, the fourth support plate 314 may be provided with a first opening, and a distance L1 from a front side surface of the first opening to a rear side surface of the first opening may be greater than a horizontal distance L2 from a front end surface of the base 02 to a rear end surface of the base 02; the vertical distance L3 from the upper side of the first opening to the upper end surface of the tester base plate 32 may be greater than the vertical distance L4 from the upper end surface of the tester base plate 32 to the upper end surface of the rotating device 01. By setting the size of the first opening to be larger than the size of the base 02, the base 02 can be smoothly moved without being obstructed by the fourth support 314.

In some embodiments, as shown in fig. 5, the hub bearing test apparatus further includes a force loading device 07, where the force loading device 07 includes a loading unit 71, a fixing bracket 73, and a screw lifting device 72, the screw lifting device 72 is fixedly installed above the fixing bracket 73, the fixing bracket 73 is located on the right side of the fourth support plate 314, and the fixing bracket 73 is detachably screwed with the fourth support plate 314;

the loading unit 71 includes an axial force loading cylinder 711, a radial force loading cylinder 712, the axial force loading cylinder 711 being located at a lower end portion of the fixed bracket 73, the radial force loading cylinder 712 being located at a right end portion of the fixed bracket 73, a force loading direction of the axial force loading cylinder 711 being perpendicular to a force loading direction of the radial force loading cylinder 712;

The fixing bracket 73 includes a first fixing plate 731, and a second fixing plate and a third fixing plate 732 extend rightward in a vertical direction of the first fixing plate 731;

the rear side of the right end of the second fixing plate is fixedly connected with the front side of the radial force loading cylinder 712, the rear side of the radial force loading cylinder 712 is fixedly connected with the front side of the third fixing plate 732, and the right side of the lower end of the first fixing plate 731 is fixedly provided with the radial force loading cylinder 712.

In the present embodiment, as shown in fig. 5, the force loading device 07 may include a loading unit 71, a fixed bracket 73, and a screw lifting device 72. The screw lifting device 72 may be fixedly installed above the fixing bracket 73, and may be used to lift or lower the fixing bracket 73. The loading unit 71 may comprise an axial force loading cylinder 711, a radial force loading cylinder 712. The axial force loading cylinder 711 may apply an axial load force to the bearing sample, and may be located at the lower end portion of the fixing bracket 73. The radial force loading cylinder 712 may apply a load force in the radial direction to the bearing sample, and may be located at the right end portion of the fixing bracket 73. The force loading direction of the axial force loading cylinder 711 may be perpendicular to the force loading direction of the radial force loading cylinder 712 such that the applied axial force, the radial force, intersect at a point, which may be a joint force loading center point. The fixing bracket 73 may include a first fixing plate 731, and the radial force loading cylinder 712 may be fixedly installed at a right side surface of a lower end portion of the first fixing plate 731. The second and third fixing plates 732 may be provided to extend rightward in the vertical direction of the first fixing plate 731. The second and third fixing plates 732 may be two plates having the same shape and the same size. The rear side of the right end of the second fixing plate may be fixedly connected to the front side of the radial force loading cylinder 712, and the front side of the third fixing plate 732 may be fixedly connected to the rear side of the radial force loading cylinder 712. By arranging the screw lifting device 72, the height of the fixing support 73 can be adjusted, so that the distance between the combined force loading center point and the rotation center line reaches the distance of the axial force loading radius R meeting the test requirement, namely the radius R of the wheel, and the stress condition of the hub bearing on the real vehicle can be simulated, the test result is more fit with the actual condition, and the accuracy of the test result is improved.

In some embodiments, the fixed bracket 73 is removably threaded with the fourth bracket 314; the fixing bracket 73 has i second through holes; the fourth support plate 314 has j second T-shaped slots, k second connecting pieces are arranged in the second T-shaped slots, the second connecting pieces are provided with second protruding parts along the bottoms of the second connecting pieces, the second protruding parts are provided with second threaded holes, and the second threaded holes are matched with the second through holes; the bottom of the second connecting piece is positioned in the second T-shaped groove, and the front side surface of the second protruding part is contacted with the front side surface of the opening of the second T-shaped groove; the rear side surface of the second bulge part is contacted with the rear side surface of the opening of the second T-shaped groove; wherein i, j and k are any natural number greater than 1.

In this embodiment, the second screw hole is adapted to the second through hole, and may be screwed with the second connection member by a bolt, so that the fixing bracket 73 and the fourth support plate 314 may be fixed together. When the bolt and the second connecting piece are in a loose-fitting state, the fixing bracket 73 can slide up and down relative to the fourth support plate 314; when the height of the fixing bracket 73 is adjusted so that the distance between the combined force loading center point and the rotation center line reaches the distance of the axial force loading radius R meeting the test requirement, the fixing bracket 73 and the fourth support plate 314 need to be fixed together, and at this time, the bolts and the second connecting piece can be fastened, so that the force loading device 07 can be quickly slid and fixed.

In some embodiments, the second through holes may be 6; the fourth support plate 314 may have 2 second T-shaped slots, 6 second connectors may be provided in the second T-shaped slots, 3 second connectors are respectively adapted in the 2 second T-shaped slots, 6 second connectors are respectively adapted to 6 second through holes, the second through holes may be in threaded connection with the second connectors through bolt penetration, and when the bolt is in a fastened state, the fixing bracket 73 may be fixed on the fourth support plate 314; when the bolts are in the loose-fitting state, the fixing bracket 73 can be moved up and down with respect to the fourth stay 314, so that the height of the fixing bracket 73 can be adjusted so that the distance between the joint force loading center point and the rotation center line reaches the radius R of the wheel.

In some embodiments, the number of the second through holes may be 8, and 4 second connectors are respectively adapted in the 2 second T-shaped slots, so as to improve the fixing strength between the fixing bracket 73 and the fourth support plate 314.

In some embodiments, as shown in fig. 4, the hub bearing test apparatus further includes an L-shaped loading arm 06 and a connecting device 63, where the L-shaped loading arm 06 includes a first connecting plate 61, a second connecting plate, and a third connecting plate 62, a front end surface of a right end portion of the first connecting plate 61 is fixedly connected with an upper end portion of the second connecting plate, and a rear end surface of the right end portion of the first connecting plate 61 is fixedly connected with an upper end portion of the third connecting plate 62;

The bottom of the connecting device 63 is slidably connected to the first connecting plate 61;

the connecting device 63 extends upwards along the upper end surface of the bottom of the connecting device 63 to form a connecting part, the connecting part is fixedly connected with the right end part of the axial force loading cylinder 711, and the connecting part is fixedly connected with the lower end part of the radial force loading cylinder 712;

the connection has a joint force loading center.

In this embodiment, as shown in fig. 4, the hub bearing testing apparatus may further include an L-shaped loading arm 06, a connecting device 63. The L-shaped loading arm 06 may include a first connection plate 61, a second connection plate (not shown), a third connection plate 62. The front end surface of the right end portion of the first connecting plate 61 may be fixedly connected with the upper end portion of the second connecting plate, the rear end surface of the right end portion of the first connecting plate 61 may be fixedly connected with the upper end portion of the third connecting plate 62, and the second connecting plate and the third connecting plate 62 may be two plates with the same shape and the same size. The bottom of the connecting device 63 can be slidably connected to the first connecting plate 61, and the connecting device 63 can be used for moving the L-shaped loading arm 06 left and right relative to the connecting device 63. The connecting device 63 may extend upward along an upper end surface of a bottom of the connecting device 63 to form a connecting portion, the connecting portion may be fixedly connected with a right end portion of the axial force loading cylinder 711, and the connecting portion may be fixedly connected with a lower end portion of the radial force loading cylinder 712. The radial load force applied by the radial force loading cylinder 712 and the axial load force applied by the axial force loading cylinder 711 intersect at a point which is a joint force loading center point, and the joint may have a joint force loading center on the joint, the joint force loading center point being located on the joint force loading center. Through setting up L type loading arm 06, can make the bearing sample be installed on L type loading arm 06, the rethread sets up the connecting portion that has joint force loading center, can concentrate the joint force loading center point of radial load force and axial load force that the test needs to exert on joint force loading center, in the follow-up test in-process of being convenient for, load force is exerted on the bearing sample through L type loading arm 06.

In this embodiment, the bottom of the connection device 63 may have 2 first U-shaped holes, the first connection plate 61 may have e third screw holes, and the connection device 63 and the first connection plate 61 may be detachably connected by bolts. When the bolts between the connecting device 63 and the first connecting plate 61 are loosened, the connecting device 63 can be moved, so that the distance between the rotating device 01 and the force loading device 07 is adjusted to reach the radial force load loading offset distance ET meeting the test requirements, and then the bolts between the connecting device 63 and the first connecting plate 61 are fastened, and the adjusting mode is convenient and quick.

In this embodiment, a first connection plate may be further included, where the first connection plate is used to fixedly connect the bearing sample to the L-shaped loading arm 06. The second connecting plate may have 1 second U-shaped hole, the third connecting plate 62 may have 1 third U-shaped hole, and the first connecting plate may have f fourth threaded holes. The front side of the first connection plate and the rear side of the second connection plate may be detachably connected by bolts, and the rear side of the first connection plate and the front side of the third connection plate 62 may be detachably connected by bolts. When the bolts between the first connecting plate and the second connecting plate, and between the first connecting plate and the third connecting plate 62 are loosened, the connecting device 63 can be moved up and down, so that the height of the first connecting plate can be adjusted to ensure that the central axis of the first connecting plate coincides with the central axis of the bearing sample, and then the bolts between the first connecting plate and the second connecting plate and the third connecting plate 62 are fastened, so that the bearing sample is fixedly connected with the L-shaped loading arm 06.

In some embodiments, the number of the third threaded holes may be 4, the 2 first U-shaped holes may be arranged in parallel, each first U-shaped hole is respectively adapted to 2 third threaded holes, and by threading a bolt through the second U-shaped hole and the fourth threaded hole, the fixing of the connecting device 63 and the first connecting plate 61 may be achieved when the bolt is in the fastened state, and the first connecting plate 61 may slide relative to the connecting device 63 when the bolt is in the loose state.

In some embodiments, the number of third screw holes may be 6, and each first U-shaped hole is respectively matched with 3 third screw threads, so that the connection strength between the connection device 63 and the first connection plate 61 is improved.

In some embodiments, the number of fourth threaded holes may be 6, the front side of the first connection plate may have 3 fourth threaded holes, the 3 fourth threaded holes are adapted to the second U-shaped hole, the rear side of the first connection plate may have 3 fourth threaded holes, the 3 fourth threaded holes are adapted to the third U-shaped hole, the first connection plate may be fixedly connected to the second connection plate, and the first connection plate may be fixedly connected to the third connection plate 62 by bolts.

In some embodiments, the number of the fourth threaded holes may be 8, and the front and rear sides of the first connecting plate are respectively provided with 4 fourth threaded holes, so that the connection strength between the first connecting plate and the second connecting plate and between the first connecting plate and the third connecting plate 62 is improved.

In some embodiments, as shown in fig. 5, the lead screw lifting device 72 includes a lead screw 722, a turntable 723, a connection assembly 721; the connecting component 721 is positioned below the screw rod 722, and the connecting component 721 is fixedly arranged at the upper end part of the fixed bracket 73;

the upper end of the fourth support plate 314 extends vertically and rightward along the right side of the fourth support plate 314 to form an extending end 315, and the extending end 315 is located above the fixed bracket 73;

the upper end of the screw rod 722 penetrates through the extending end 315 to be connected with the turntable 723, and the lower end of the screw rod 722 is connected with the connecting component 721 in a screwing way;

the connection assembly 721 comprises a shell 7212 and a screw 7211, wherein the front side surface of the shell 7212 is fixedly connected with the rear side surface of the upper end part of the second fixing plate, the rear side surface of the shell 7212 is fixedly connected with the front side surface of the upper end part of the third fixing plate 732, and the shell 7212 is sleeved outside the screw 7211.

In this embodiment, as shown in FIG. 5, the lead screw lift device 72 may include a lead screw 722, a dial 723, and a connection assembly 721. The upper end of the fourth support plate 314 may extend vertically and rightward along the right side of the fourth support plate 314 to form an extension end 315, and the extension end 315 may be located above the fixing bracket 73. The upper end of the screw 722 may be coupled to the dial 723 through the protruding end 315, and the lower end of the screw 722 may be coupled to the coupling assembly 721 by screwing. The connection assembly 721 may be fixedly installed at an upper end portion of the fixing bracket 73. The connection assembly 721 may include a housing 7212, a nut 7211. The front side of the housing 7212 may be fixedly connected to the rear side of the upper end of the second fixing plate, the rear side of the housing 7212 may be fixedly connected to the front side of the upper end of the third fixing plate 732, and the housing 7212 may be sleeved outside the screw 7211. The screw rod 722 is fixed through the extending end 315 and connected with the fixed support 73, the turntable 723 can rotate to drive the screw rod 722 to move up and down, so that the fixed support 73 can be driven to move up and down, the distance between the combined force loading center point and the rotation center line can be adjusted to reach the axial force loading radius R meeting the test requirement, the structure is simple, and an operator only needs to rotate the turntable 723 to avoid effort during operation.

In some embodiments, as shown in fig. 6, a loading offset adjustment method applied to the hub bearing test apparatus of any of the above embodiments may include:

step S11, fixedly connecting the axial force loading cylinder 711 with the connecting device 63, and fixedly connecting the radial force loading cylinder 712 with the connecting device 63;

step S12, loosening the fixed bracket 73 and the fourth support plate 314, and driving the power loading device 07 to move up and down through the lead screw lifting device 72 to enable the power loading device 07 to move to a first set position so as to fasten the fixed bracket 73 and the fixed plate;

step S13, mounting a bearing sample at the right end part of the rotating device 01, mounting a first connecting disc at the right end part of the bearing sample, and mounting an L-shaped loading arm 06 at the right end part of the first connecting disc;

step S14, loosening the base 02 and the bottom plate 32 of the testing machine, inflating the air floatation guide rail 51, and swinging the crank 523 according to the first rotating speed to realize the left-right movement of the base 02, so as to roughly adjust the moving distance of the base 02; the crank 523 is rocked according to the second rotation speed to finely adjust the moving distance of the base 02, the base 02 is moved to a second set position, and the base 02 and the bottom plate 32 of the testing machine are fastened;

step S15, fastening the first connecting disc and the L-shaped loading arm 06, and fastening the connecting device 63 and the L-shaped loading arm 06;

And S16, performing a test.

In this embodiment, as shown in fig. 6, a loading offset adjustment method may include steps S11-S16. In step S11, the axial force loading cylinder 711 and the radial force loading cylinder 712 may be fixedly connected to the connecting device 63, respectively, so that the distance between the wheel center line of the bearing sample and the joint force loading center point and the distance between the joint force loading center point and the rotation center line can be adjusted later. In step S12, the bolts between the fixing bracket 73 and the fourth support plate 314 may be loosened, the force loading device 07 may be moved up and down by the screw lifting device 72, and the force loading device 07 may be moved to the first setting position, and then the fixing bracket 73 and the fourth support plate 314 may be fastened. The first set position may be a distance of the joint force loading center point from the rotation center line being a radius R of the wheel. In step S13, a bearing sample may be mounted on the right end portion of the rotating device 01, a first connection plate may be mounted on the right end portion of the bearing sample, and an L-shaped loading arm 06 may be mounted on the right end portion of the first connection plate. The bearing test specimen can be connected to the L-shaped loading arm 06 via the first connecting disk, so that the bearing test specimen can receive the load force transmitted by the connecting device 63 of the L-shaped loading arm 06 during the subsequent test. In step S14, the base 02 and the tester floor 32 may be released, and the air rail 51 may be inflated, so that the air rail 51 may start to operate. The crank 523 can be swung according to the first rotation speed so that the base 02 can be moved left and right, and coarse adjustment is performed on the movement distance of the base 02. At this time, the bolts between the connecting device 63 and the L-shaped loading arm 06 are in a loose-fitting state, so that the L-shaped loading arm 06 can move left and right together with the base 02. The base 02 can move left and right with respect to the slide rail unit 511 together with the rotating device 01 and the L-shaped loading arm 06. The crank 523 can be swung according to the second rotation speed to finely adjust the moving distance of the base 02, the base 02 is moved to the second setting position, and the base 02 and the tester bottom plate 32 are fixed by bolts. The second set position may be a position where the base 02 is located when the distance between the wheel center line of the bearing sample and the joint force loading center point reaches the requirement required for the test. In step S15, the first connection disc may be fastened with the L-shaped loading arm 06 by a bolt, and the connection device 63 may be fastened with the L-shaped loading arm 06 by a bolt, so that the bearing sample and the L-shaped loading arm may be fixed, and the subsequent test may be performed conveniently. In step S16, a test may be performed on the bearing sample to obtain required test data.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples of implementing the disclosure, and that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure.

Claims

1. A hub bearing testing apparatus, the hub bearing testing apparatus comprising:

the testing machine comprises a main body frame, a base, a sliding device and a rotating device;

2. A hub bearing testing apparatus according to claim 1, wherein,

the base comprises a first panel, a rib plate and a second panel, wherein the first panel is fixedly connected with the upper surface of the rib plate, the lower surface of the rib plate is fixedly connected with the upper surface of the second panel, and the rib plate is obliquely arranged relative to the first panel;

the tooth space of the first gear is 2 mm-15 mm.

3. A hub bearing testing apparatus according to claim 1, wherein,

the base is detachably connected with the bottom plate of the testing machine through threads;

the base is provided with n first through holes;

Wherein n, m and q are any natural number greater than 1.

4. A hub bearing testing apparatus according to claim 1, wherein,

the sliding rail unit comprises a first sliding rail and a second sliding rail, the sliding block unit comprises a first sliding block and a second sliding block, the first sliding rail is in sliding connection with the first sliding block, and the second sliding rail is in sliding connection with the second sliding block;

5. A hub bearing testing apparatus according to claim 1, wherein,

the mobile unit further comprises a crank, and the crank is fixedly connected with the first gear;

6. A hub bearing testing apparatus according to claim 1, wherein,

the main body frame of the testing machine further comprises a testing machine support, the testing machine support comprises a testing machine top plate, a first support plate, a second support plate, a third support plate and a fourth support plate, the upper end face of the first support plate is fixedly connected with the front end face of the testing machine top plate, and the lower end face of the first support plate is fixedly connected with the upper end face of the testing machine bottom plate;

the vertical distance L3 from the upper side surface of the first opening to the upper end surface of the bottom plate of the testing machine is larger than the vertical distance L4 from the upper end surface of the bottom plate of the testing machine to the upper end surface of the rotating device.

7. A hub bearing testing apparatus according to claim 6, wherein,

the hub bearing test equipment further comprises a force loading device, wherein the force loading device comprises a loading unit, a fixed support and a screw lifting device, the screw lifting device is fixedly arranged above the fixed support, the fixed support is positioned on the right side of the fourth support plate, and the fixed support is detachably connected with the fourth support plate through threads;

8. A hub bearing testing apparatus according to claim 7, wherein,

the hub bearing test equipment further comprises an L-shaped loading arm and a connecting device, wherein the L-shaped loading arm comprises a first connecting plate, a second connecting plate and a third connecting plate, the front end face of the right end part of the first connecting plate is fixedly connected with the upper end part of the second connecting plate, and the rear end face of the right end part of the first connecting plate is fixedly connected with the upper end part of the third connecting plate;

the connection has a joint force loading center.

9. A hub bearing testing apparatus according to claim 7, wherein,

the screw lifting device comprises a screw rod, a turntable and a connecting component; the connecting component is positioned below the screw rod and fixedly arranged at the upper end part of the fixed bracket;

10. The method for adjusting the loading offset of the hub bearing test equipment according to any one of claims 1 to 9, wherein the method for adjusting the loading offset comprises the steps of,

And S16, performing a test.