CN217786553U - Rotary drum test device suitable for tire installation posture conversion and loading - Google Patents

Abstract

The utility model belongs to the technical field of tire test devices, in particular to a drum test device adapting to the conversion and loading of tire installation postures, which comprises a device machine table used for fixing and installing the rest mechanisms of the device; the rotary drum mechanism is arranged on the device machine table and used for simulating the road surface load and the rotating speed of the test tires exerted on different road surfaces; and the tire loading mechanism is abutted against the inner surface or the outer surface of the rotary drum mechanism, is movably arranged above the machine table of the device and is used for testing the loading and posture conversion of the tire. The utility model provides an adaptation tire installation gesture conversion and loaded rotary drum test device, not only can effectual improvement test device's compatibility, reduce equipment manufacturing cost, the loading and the dismantlement of the experimental tire of being convenient for moreover, dismouting efficiency and the simplicity that can effectual improvement experimental tire, and then the holistic test efficiency of effectual improvement test device.

Description

Rotary drum test device suitable for tire installation posture conversion and loading

Technical Field

The utility model belongs to the technical field of tire test device, concretely relates to adaptation tire installation gesture conversion and loaded rotary drum test device.

Background

The drum test device is a main device for verifying the performance of the tire, and is generally divided into an inner edge drum test device and an outer edge drum test device according to the difference of contact surfaces of a drum and a tire to be tested.

The outer edge rotary drum test device is used for testing the contact between a tire and the outer edge surface of a rotary drum and simulating the form of a road surface by using the outer surface of the rotary drum; the inner edge drum test device is used for simulating the road surface shape by using the inner surface of a drum when a test tire is in contact with the inner edge surface of the drum. No matter what type of test device, in order to guarantee the stability of test tire and rotary drum contact, tire loading mechanism is the structural design who constructs relatively fixed with rotary drum mechanism, and the installation gesture can not be changed at will, therefore the test device of different grade type need design special tire loading mechanism, and not only test equipment's manufacturing cost is high, and the tire is dismantled inconveniently moreover, influences experimental efficiency easily.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides an adaptation tire installation gesture conversion and loaded rotary drum test device, tire loading mechanism can offset with the rotary drum internal surface or the surface activity of rotary drum mechanism according to the experimental needs of reality, satisfy the conversion of the different installation gestures of test tire and rotary drum, compatibility that not only can effectual improvement test device, reduce the equipment manufacturing cost because of the special use of test equipment increases, and tire loading mechanism is movable structural design, be convenient for test tire's loading and dismantlement, dismouting efficiency and simplicity that can effectual improvement test tire, and then the holistic test efficiency of effectual improvement test device.

The utility model discloses the technological effect that will reach realizes through following technical scheme:

the utility model relates to a rotary drum test device adapting to the conversion and loading of the installation posture of a tire, which comprises a device machine table used for fixing and installing the rest mechanisms of the device; the rotary drum mechanism is arranged on the device machine table and used for simulating the road surface load and the rotating speed of the test tires exerted on different road surfaces; and the tire loading mechanism is abutted against the inner surface or the outer surface of the rotary drum mechanism, is movably arranged above the machine table of the device and is used for testing the loading and posture conversion of the tire.

As one preferable scheme, the tire loading mechanism comprises a loading guide assembly for driving the test tire to move up and down in the vertical direction, and a wheel reversing assembly arranged on the loading guide assembly and used for driving the test tire to perform posture conversion.

As a preferred scheme, the loading guide assembly comprises a loading guide connecting rod which is vertically arranged, a force measuring unit which is arranged at the bottom end of the loading guide connecting rod and used for measuring the mechanical response data of the test tire, and a bearing bracket which is arranged at the bottom of the force measuring unit and used for being connected with the wheel reversing assembly.

As one preferable scheme, the wheel reversing assembly comprises a bearing rotating shaft unit which is arranged on the bearing bracket and can rotate freely, and a wheel unit which is arranged on the bearing rotating shaft unit and is used for testing tire installation.

As one preferable scheme, the force bearing rotating shaft unit comprises a rotating shaft bearing group arranged on the bearing bracket and a force bearing rotating shaft group which is arranged on the rotating shaft bearing group and can freely rotate around the circumferential direction of the rotating shaft bearing group.

As a preferred scheme, the rotating shaft bearing set comprises a bearing end cover arranged on the bearing bracket, and an upper thrust bearing and a lower thrust bearing which are arranged in the bearing end cover at intervals along the central line direction of the bearing end cover; the bearing end cover comprises an end cover body, a fan-shaped limiting boss and a positioning clamping block, wherein the fan-shaped limiting boss is convexly arranged at the top of the end cover body and used for limiting the rotation of the bearing rotating shaft group, and the positioning clamping block is arranged on the end cover body through a fastener and used for positioning the rotated bearing rotating shaft group.

As one preferable scheme, a clamping block limiting installation groove which is matched with the positioning clamping block and used for limiting and fixing the positioning clamping block is further formed in the bearing end cover.

As a preferred scheme, the force bearing rotating shaft group comprises a rotating shaft mounting clamp arranged between an upper thrust bearing and a lower thrust bearing, an L-shaped force bearing rotating shaft with the top end connected with the rotating shaft mounting clamp, a positioning cover plate arranged at the top of the L-shaped force bearing rotating shaft and matched with the bearing end cover, and a rotating arm outer cylinder sleeved on the vertical end of the L-shaped force bearing rotating shaft.

As one of the preferred schemes, the positioning cover plate comprises a cover plate body matched with the top end of the L-shaped bearing rotating shaft, a fan-shaped limiting block convexly arranged on the periphery of the cover plate body and matched with the bearing end cover, and a cover plate positioning groove arranged on the fan-shaped limiting block and matched with the positioning clamping block.

As one preferable scheme, the sum of the central angle α corresponding to the fan-shaped limiting block and the central angle β corresponding to the fan-shaped limiting boss is less than or equal to 180 °.

As a preferred scheme, the drum mechanism includes a drum whose inner surface or outer surface abuts against the test tire, a drum shaft penetrating the drum centerline and used for driving the drum to rotate, a shaft mounting seat connected to two ends of the drum shaft and arranged on the device platform, and a shaft driving member connected to one end of the drum shaft and used for driving the drum shaft to rotate.

As a preferred scheme, the device machine comprises a machine body and a rotary drum movable groove which is arranged on the machine body and is matched with the rotary drum mechanism.

To sum up, the utility model discloses at least, following useful part has:

1. the utility model discloses well adaptation tire installation gesture conversion and loaded rotary drum test device, tire loading mechanism can offset with the rotary drum internal surface or the surface activity of rotary drum mechanism according to the experimental needs of reality, satisfy the conversion of the different installation gestures of test tire and rotary drum, compatibility that not only can effectual improvement test device, reduce the equipment manufacturing cost who increases because of the special use of test equipment, and tire loading mechanism is movable structural design, be convenient for test tire's loading and dismantlement, dismouting efficiency and the simplicity that can effectual improvement test tire, and then the holistic test efficiency of effectual improvement test device.

2. The utility model discloses well adaptation tire installation gesture conversion and loaded rotary drum test device realizes the switching-over to the test tire through the wheel switching-over subassembly, and when needs dismouting test tire, the wheel switching-over subassembly can be with the test tire outside the pavement of rotary drum, so that the installation and the dismantlement of test tire, improve experimental efficiency; and when the test tire needs to be switched with the posture of the rotary drum, the wheel reversing assembly can firstly rotate the test tire out of the road surface of the rotary drum and then switch the posture of the test tire, so that the problem that the posture switching cannot be realized due to the interference between the test tire and the rotary drum, and the posture switching efficiency is influenced can be effectively prevented.

Drawings

FIG. 1 is a schematic view of an overall structure of a drum testing apparatus adapted to the conversion and loading of the installation posture of a tire according to an embodiment of the present invention;

FIG. 2 is a schematic view of an assembly structure of the machine table and the drum mechanism of the embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a tire loading mechanism according to an embodiment of the present invention;

FIG. 4 is an exploded view of the tire loading mechanism in an embodiment of the present invention;

FIG. 5 is a sectional view of the assembly structure of the bearing rotary shaft unit and the bearing bracket in the embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a bearing end cap according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a positioning cover plate in an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention will be combined to clearly and completely describe the technical solutions of the embodiments of the present invention. The described embodiments are some, but not all embodiments of the invention.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1:

referring to fig. 1, the drum test apparatus adapted to the tire installation posture conversion and loading in the present embodiment includes an apparatus machine 100, a drum mechanism 200 disposed on the apparatus machine 100, and a tire loading mechanism 300 movably disposed above the apparatus machine 100 and abutting against an inner surface or an outer surface of a drum of the drum mechanism 200. The device machine 100 is used for fixing and installing other mechanisms of the device, the rotary drum mechanism 200 is used for simulating road surface loads and rotating speeds applied to test tires on different road surfaces, and the tire loading mechanism 300 is used for loading and posture conversion of the test tires.

Referring to fig. 2, the apparatus table 100 includes a table body 110, and a drum movable groove 120 disposed on the table body 110 and adapted to the drum mechanism 200. The drum mechanism 200 includes a drum 210, a drum rotating shaft 220, a rotating shaft mounting seat 230 and a rotating shaft driving member 240, wherein the drum 210 is supported on the drum moving groove 120, the drum rotating shaft 220 penetrates through the center line of the drum 210 and is used for driving the drum 210 to rotate, the rotating shaft mounting seat 230 is connected with two ends of the drum rotating shaft 220 and is arranged on the device machine table 100, and one end of the drum rotating shaft 220 is connected with the rotating shaft driving member 240 and is used for driving the drum rotating shaft 220 to rotate. Preferably, the inner road surface and the outer road surface of the drum 210 can be set into road surface modules of different materials according to actual test requirements, such as asphalt, cement or a steel road surface with a certain roughness; the rotating shaft driving member 240 is selected as a motor with certain power and frequency conversion requirements, and can drive the rotating drum 210 to rotate according to a preset direction and speed according to the direction and speed required by the test. When the rotary drum shaft 220 is driven by the shaft driving member 240 to rotate, the rotary drum 210 connected to the rotary drum shaft 220 can also be driven by the shaft driving member 240 to rotate, and the test tire can be pressed against the inner surface or the outer surface of the rotary drum 210, so that the running of the test tire on different road surfaces can be effectively simulated.

In the embodiment, the drum test device is suitable for tire mounting posture conversion and loading, the tire loading mechanism 300 can be movably abutted against the inner surface or the outer surface of the drum 210 of the drum mechanism 200 according to actual test requirements, the conversion of different mounting postures of a test tire and the drum 210 is met, the compatibility of the test device can be effectively improved, the equipment manufacturing cost increased due to the special purpose of test equipment is reduced, the tire loading mechanism 300 is of a movable structural design, the loading and the dismounting of the test tire are facilitated, the dismounting efficiency and the simplicity of the test tire can be effectively improved, and further the integral test efficiency of the test device is effectively improved.

When a test tire is loaded on the inner surface of drum 210, the tire loading mechanism 300 presses the test tire against the inner surface of drum 210 by applying an upward pulling force, which can be set according to the loading force required by the test, such as vertical force, lateral force, torsional force and lateral force. When the test tire is subjected to a loading test on the outer road surface of the drum 210, the tire loading mechanism 300 presses the test tire against the outer road surface of the drum 210 by applying downward pressure, the pressure can be set according to the loading force required by the test requirements, and the power source of the loading force can be selected to be hydraulic driving loading.

Example 2:

referring to fig. 1, the drum test apparatus adapted to the conversion and loading of the tire mounting posture in this embodiment includes an apparatus machine table 100, a drum mechanism 200 disposed on the apparatus machine table 100, and a tire loading mechanism 300 movably disposed above the apparatus machine table 100 and abutting against an inner surface or an outer surface of a drum of the drum mechanism 200; the device machine 100 is used for fixing and installing other mechanisms of the device, the rotary drum mechanism 200 is used for simulating road surface loads and rotating speeds applied to test tires on different road surfaces, and the tire loading mechanism 300 is used for loading and posture conversion of the test tires. The main difference is that the specific structural design of the tire loading mechanism 300 in this embodiment is as follows:

referring to fig. 3, the tire loading mechanism 300 includes a loading guide assembly 310 for driving the test tire to move up and down in the vertical direction, and a wheel turning assembly 320 disposed on the loading guide assembly 310 for driving the test tire to perform attitude conversion; the test tire reversing mechanism realizes the reversing of a test tire through the wheel reversing assembly 320, and when the test tire needs to be disassembled and assembled, the wheel reversing assembly 320 can rotate the test tire out of the road surface of the rotary drum 210, so that the test tire can be conveniently assembled and disassembled, and the test efficiency is improved; moreover, when the test tire needs to be switched with the posture of the rotary drum 210, the wheel turning assembly 320 can turn the test tire out of the road surface of the rotary drum 210 first and then switch the posture of the test tire, so that the problem that the posture switching cannot be realized due to the interference between the test tire and the rotary drum 210 and the influence on the posture switching efficiency can be effectively prevented.

Referring to fig. 4, the loading guide assembly 310 includes a loading guide link 311 vertically disposed, a force measuring unit 312 disposed at a bottom end of the loading guide link 311 and used for measuring mechanical response data of the tested tire, and a bearing bracket 313 disposed at a bottom of the force measuring unit 312 and used for connecting with the wheel turning assembly 320. The wheel reversing assembly 320 comprises a bearing rotating shaft unit 321 which is arranged on the bearing bracket 313 and can rotate freely, and a wheel unit 322 which is arranged on the bearing rotating shaft unit 321 and is used for testing tire installation.

When the test tire needs to be adjusted from the outer surface test position of the rotary drum 210 to the inner surface test position of the rotary drum 210, the test device is closed first, and at the moment, the tire loading mechanism 300 is in a complete unloading state and the equipment is in a safe shutdown state; then the bearing rotating shaft unit 321 is rotated 180 degrees and then locked, and the wheel unit 322 arranged on the bearing rotating shaft unit 321 is rotated out of the pavement of the rotating drum 210 under the driving of the bearing rotating shaft unit 321; then the loading guide assembly 310 is started, the bearing bracket 313 descends a certain height under the driving action of the loading guide connecting rod 311, so as to drive the wheel reversing assembly 320 arranged on the bearing bracket 313 to descend a certain height; and then unlocking the force bearing rotating shaft unit 321, rotating the wheel unit 322 by 180 degrees again through the force bearing rotating shaft unit 321, and then rotating the wheel unit back to the position corresponding to the pavement of the rotating drum 210, so that the test tire can be adjusted to the test position corresponding to the inner surface of the rotating drum 210. Similarly, when the test tire needs to be adjusted from the inner surface test position of the drum 210 to the outer surface test position of the drum 210, the force-bearing rotating shaft unit 321 adjusts the wheel unit 322 the same, and the main difference is that the wheel reversing assembly 320 is driven by the loading guide assembly 310 to move to the height contacting with the outer surface of the drum 210.

When the test tire needs to be replaced or the wheel unit 322 needs to be overhauled, especially after the test of the test tire on the inner surface of the rotary drum 210 is completed, the wheel unit 322 can be rotated out of the road surface of the rotary drum 210 through the rotation of the bearing rotary shaft unit 321, so that the replacement of the test tire and the overhaul of the wheel unit 322 are facilitated.

Example 3:

referring to fig. 1, the drum test apparatus adapted to the tire installation posture conversion and loading in the present embodiment includes an apparatus machine 100, a drum mechanism 200 disposed on the apparatus machine 100, and a tire loading mechanism 300 movably disposed above the apparatus machine 100 and abutting against an inner surface or an outer surface of a drum of the drum mechanism 200; the device machine 100 is used for fixing and installing other mechanisms of the device, the rotary drum mechanism 200 is used for simulating road surface loads and rotating speeds applied to test tires on different road surfaces, and the tire loading mechanism 300 is used for loading and posture conversion of the test tires. The main difference is that the tire loading mechanism 300 in this embodiment is further designed based on embodiment 2:

referring to fig. 4, the force-bearing rotating shaft unit 321 includes a rotating shaft bearing set 3211 disposed on the bearing bracket 313, and a force-bearing rotating shaft set 3212 disposed on the rotating shaft bearing set 3211 and capable of freely rotating around the rotating shaft bearing set 3211 in the circumferential direction. Referring to fig. 5, the rotating shaft bearing assembly 3211 includes a bearing cover 3211a installed on the supporting bracket 313, and an upper thrust bearing 3211b and a lower thrust bearing 3211c installed in the bearing cover 3211a at intervals along a central line direction of the bearing cover 3211 a; the force-bearing rotating shaft group 3212 includes a rotating shaft mounting clip 3212a disposed between the upper thrust bearing 3211b and the lower thrust bearing 3211c, an L-shaped force-bearing rotating shaft 3212b having a top end connected to the rotating shaft mounting clip 3212a, a positioning cover plate 3212c disposed at the top of the L-shaped force-bearing rotating shaft 3212b and adapted to the bearing end cap 3211a, and a rotating arm outer cylinder 3212d sleeved at the vertical end of the L-shaped force-bearing rotating shaft 3212 b.

Referring to fig. 6, the bearing end cap 3211a includes an end cap body 301, a sector-shaped limit boss 302 protruding from the top of the end cap body 301 for limiting the rotation of the bearing rotation shaft set 3212, a positioning clamping block 304 mounted on the end cap body 301 by a fastener 303 for positioning the rotated bearing rotation shaft set 3212, and a clamping block limit mounting groove 305 disposed on the top of the end cap body 301 and adapted to the positioning clamping block 304, wherein the clamping block limit mounting groove 305 can limit and fix the positioning clamping block 304 to prevent the positioning clamping block 304 from being released from the end cap body 301.

Referring to fig. 7, the positioning cover plate 3212c includes a cover plate body 306 adapted to the top end of the L-shaped bearing shaft 3212b, a fan-shaped stopper 307 protruding from the periphery of the cover plate body 306 and adapted to the bearing end cover 3211a, and a cover plate positioning slot 308 opened on the fan-shaped stopper 307 and adapted to the positioning and fastening block 304. Preferably, the sum of the central angle α corresponding to the fan-shaped limiting block 307 and the central angle β corresponding to the fan-shaped limiting boss 302 is not more than 180 °, so that the rotation angle of the L-shaped bearing rotating shaft 3212b is not less than 180 ° to prevent the L-shaped bearing rotating shaft 3212b from interfering with the road surface of the drum 210 due to an excessively small rotation angle.

When the L-shaped force bearing rotating shaft 3212b is unlocked, the fastener 303 is detached, that is, the positioning clamping block 304 can be detached from the clamping block limiting installation groove 305 and the cover plate positioning groove 308, and at this time, the positioning cover plate 3212c is in a state of freely rotating around the bearing end cover 3211a, so that the L-shaped force bearing rotating shaft 3212b connected with the positioning cover plate can also freely rotate; however, due to the interference between the sector-shaped limiting boss 302 and the sector-shaped limiting block 307, the L-shaped bearing spindle 3212b can only rotate within a specific rotation range, so as to prevent the L-shaped bearing spindle 3212b from rotating back to the original state again due to the limitation. When locking L shape load pivot 3212b, aim at the back with apron constant head tank 308 and the spacing mounting groove 305 of chucking piece, place the location chucking piece 304 in apron constant head tank 308 and the spacing mounting groove 305 of chucking piece again, fix the back through fastener 303, can realize the locking of L shape load pivot 3212b, prevent that L shape load pivot 3212b from taking place to rotate when experimental or maintenance, influence the efficiency experimental and maintenance.

According to the technical scheme of above-mentioned embodiment, the utility model provides an adaptation tire installation gesture conversion and loaded rotary drum test device not only can effectual improvement test device's compatibility, reduces equipment manufacturing cost, and the loading and the dismantlement of the experimental tire of being convenient for moreover can effectual improvement test tire's dismouting efficiency and simplicity, and then the holistic test efficiency of effectual improvement test device.

In the description of the present invention, it is to be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

While the invention has been described in conjunction with the specific embodiments set forth above, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the spirit and scope of the appended claims.

Claims (12)

1. A rotary drum test device adapting to tire installation posture conversion and loading is characterized by comprising:

the device machine table is used for fixing and installing the other mechanisms of the device;

the rotary drum mechanism is arranged on the device machine table and used for simulating the road surface load and the rotating speed of the test tires exerted on different road surfaces;

and the tire loading mechanism is abutted against the inner surface or the outer surface of the rotary drum mechanism, is movably arranged above the machine table of the device and is used for testing the loading and posture conversion of the tire.

2. The drum test device according to claim 1, wherein the tire loading mechanism comprises a loading guide assembly for driving the test tire to move up and down in the vertical direction, and a wheel turning assembly arranged on the loading guide assembly for driving the test tire to perform attitude conversion.

3. The drum testing device according to claim 2, wherein the loading guide assembly comprises a vertically arranged loading guide connecting rod, a force measuring unit arranged at the bottom end of the loading guide connecting rod and used for measuring mechanical response data of the tested tire, and a bearing bracket arranged at the bottom of the force measuring unit and used for being connected with the wheel reversing assembly.

4. The drum test rig according to claim 2, wherein the wheel-reversing assembly comprises a bearing rotary shaft unit which is arranged on the bearing bracket and can rotate freely, and a wheel unit which is arranged on the bearing rotary shaft unit and is used for testing tire installation.

5. The drum test device of claim 4, wherein the force-bearing rotating shaft unit comprises a rotating shaft bearing set arranged on the bearing bracket, and a force-bearing rotating shaft set arranged on the rotating shaft bearing set and capable of freely rotating around the circumferential direction of the rotating shaft bearing set.

6. The drum test device of claim 5, wherein the rotating shaft bearing set comprises a bearing end cover mounted on the bearing bracket, and an upper thrust bearing and a lower thrust bearing mounted in the bearing end cover at intervals along the central line direction of the bearing end cover; wherein the content of the first and second substances,

the bearing end cover comprises an end cover body, a fan-shaped limiting boss and a positioning clamping block, wherein the fan-shaped limiting boss is convexly arranged at the top of the end cover body and used for limiting the rotation of the bearing rotating shaft group, and the positioning clamping block is arranged on the end cover body through a fastener and used for positioning the rotating bearing rotating shaft group.

7. The drum test device of claim 6, wherein the bearing end cover is further provided with a clamping block limiting installation groove which is matched with the positioning clamping block and used for limiting and fixing the positioning clamping block.

8. The drum test device according to claim 5, wherein the force bearing rotating shaft set comprises a rotating shaft mounting clamp arranged between the upper thrust bearing and the lower thrust bearing, an L-shaped force bearing rotating shaft with the top end connected with the rotating shaft mounting clamp, a positioning cover plate arranged at the top of the L-shaped force bearing rotating shaft and matched with a bearing end cover, and a rotating arm outer cylinder sleeved on the vertical end of the L-shaped force bearing rotating shaft.

9. The drum test device according to claim 8, wherein the positioning cover plate comprises a cover plate body matched with the top end of the L-shaped bearing rotating shaft, a fan-shaped limiting block which is convexly arranged on the periphery of the cover plate body and matched with the bearing end cover, and a cover plate positioning groove which is arranged on the fan-shaped limiting block and matched with the positioning clamping block.

10. The drum test device of claim 9, wherein the sum of the central angle α corresponding to the fan-shaped limiting block and the central angle β corresponding to the fan-shaped limiting boss is less than or equal to 180 °.

11. The drum test device according to claim 1, wherein the drum mechanism includes a drum having an inner surface or an outer surface abutting against the test tire, a drum shaft passing through a center line of the drum and driving the drum to rotate, a shaft mounting seat connected to two ends of the drum shaft and disposed on the device platform, and a shaft driving member connected to one end of the drum shaft and driving the drum shaft to rotate.

12. The drum test device according to claim 1, wherein the device platform comprises a platform body and a drum movable groove which is arranged on the platform body and is adapted to the drum mechanism.

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