A wheel roller device for a track sample forming machine

By introducing an automatic scraper and cleaning agent spraying system into the roller mill, the problem of low cleaning efficiency of traditional roller mills has been solved, achieving efficient and automated asphalt cleaning and extending the service life of the roller mill.

CN224471367UActive Publication Date: 2026-07-07HUBEI GUOCHUANG HI TECH MATERIAL

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
HUBEI GUOCHUANG HI TECH MATERIAL
Filing Date
2025-08-01
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Traditional roller mills lack cleaning capabilities, resulting in the need for manual scraping of residual asphalt on the roller surface, which is inefficient and easily scratches the roller.

Method used

A wheel-rolling device for a rut sample forming machine was designed. The device uses a first electric telescopic rod to drive a scraper to automatically scrape off the asphalt, and a deep cleaning mechanism sprays a cleaning agent for secondary cleaning. The device includes a scraper, a collection box, and a cleaning agent spraying system.

Benefits of technology

It achieves automated asphalt cleaning, improves efficiency, avoids damage to the rollers caused by manual operation, extends the service life of the rollers, and facilitates centralized cleaning of asphalt through the design of inclined scrapers and collection boxes.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN224471367U_ABST
    Figure CN224471367U_ABST
Patent Text Reader

Abstract

The utility model is suitable for test equipment technical field provides a kind of wheel rolling device of rut test sample forming machine, including the support frame on the forming machine body, the support frame is connected with the hydraulic cylinder of the forming machine body;Be arranged in the support frame and be used for rolling material rolling wheel;First electric telescopic link is arranged in the support frame of the forming machine body, and the first electric telescopic link is located in the side of the rolling wheel;U-shaped frame is arranged below the first electric telescopic link, and the bottom of the U-shaped frame is fixedly installed with the collection box for collecting asphalt scraped from the rolling wheel.This scheme provides the wheel rolling device of rut test sample forming machine, and asphalt is scraped automatically by first electric telescopic link driving scraper, and depth cleaning mechanism sprays cleaning agent to carry out secondary cleaning to rolling wheel, can realize efficient cleaning rolling wheel, improve cleaning effect, prolong rolling wheel life, reduce the advantage of manual operation.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] This utility model belongs to the field of testing equipment technology, and in particular relates to a wheel rolling device for a rut sample forming machine. Background Technology

[0002] The rut specimen forming machine is mainly used to compact asphalt mixtures using a wheel rolling device during rut tests. It can also be used for the preparation of wheel rolling specimens for other physical property tests of asphalt mixtures.

[0003] Currently, after the material is compacted, asphalt residue remains on the surface of the roller. Traditional roller mills do not have a cleaning function, so manual scraping of the asphalt on the roller is required. Manual scraping is inefficient and can easily scratch the surface of the roller. Utility Model Content

[0004] This invention provides a wheel rolling device for a rut sample forming machine, which aims to solve the problem mentioned in the background art that traditional wheel rolling devices do not have a cleaning function.

[0005] To solve the above problems, this utility model is implemented as follows: a wheel rolling device for a rut sample forming machine, comprising: a support frame mounted on the forming machine body, the support frame being connected to a hydraulic cylinder of the forming machine body; a rolling wheel mounted within the support frame for rolling materials; a first electric telescopic rod mounted within a bracket of the forming machine body, the first electric telescopic rod being located on one side of the rolling wheel; a U-shaped frame mounted below the first electric telescopic rod, the bottom of the U-shaped frame being fixedly mounted with a collection box for collecting asphalt scraped from the rolling wheel; a scraper fixedly mounted on the top of the collection box and arranged at an angle, the scraper being used to scrape off the asphalt on the rolling wheel; and a deep cleaning mechanism mounted on the support frame for secondary cleaning of the rolling wheel.

[0006] Preferably, the deep cleaning mechanism includes: a drain pipe fixedly installed inside the support frame for spraying asphalt cleaning agent onto the roller; a storage box fixedly installed on the top of the inner wall of the support frame for storing asphalt cleaning agent; and a water pump installed inside the storage box for conveying the cleaning agent to the drain pipe, wherein the drain end of the water pump is fixedly connected to the drain pipe.

[0007] Preferably, a stirring rod for mixing cleaning agents is rotatably installed inside the liquid storage box, a protective cover is fixedly installed on one side of the liquid storage box, a handle is rotatably installed on one side of the protective cover, and bevel gears are fixedly fitted on both the handle and the stirring rod, with the two bevel gears meshing with each other.

[0008] Preferably, a second electric telescopic rod is fixedly installed on one side of the support frame, and rectangular seats are rotatably installed on both the second electric telescopic rod and the other side of the support frame. The two rectangular seats are respectively inserted into the two rotating shafts of the rolling wheel. A motor for driving the rolling wheel to rotate is fixedly installed on the support frame, and the output shaft of the motor is fixedly connected to the rotating shaft of the rectangular seat located on one side of the support frame through a coupling.

[0009] Preferably, a collection plate for collecting cleaning agent dripping from the rolling wheel is rotatably installed inside the bracket. The top of the collection plate has a collection groove, and the bottom of the collection groove is equipped with a connecting pipe. A water collection box is detachably installed on the connecting pipe.

[0010] Preferably, a driven gear is fixedly sleeved on the rotating shaft of the collecting plate, a third electric telescopic rod is fixedly installed on one side of the bracket, a rack is installed on the third electric telescopic rod, and the rack meshes with the driven gear.

[0011] Preferably, a guide block for guiding the rack is fixedly installed on one side of the bracket, the guide block is slidably connected to the rack, and a protective box is installed on one side of the bracket, the protective box covering the rack and the driven gear.

[0012] Preferably, a connecting seat is fixedly installed on the top of the U-shaped frame, and a connecting block is fixedly installed on the bottom of the first electric telescopic rod. The connecting block is slidably connected to the connecting seat. A plug is inserted into one side of the connecting seat, and the plug slides through the connecting block. A metal cover is fixedly installed on the other side of the connecting seat, and the metal cover is attracted to a magnet at one end of the plug.

[0013] Compared with related technologies, the wheel rolling device of the rut sample forming machine provided by this utility model has the following beneficial effects:

[0014] Compared with existing technologies, the wheel rolling device of the rut sample forming machine provided in this solution automatically scrapes off asphalt by driving the scraper with the first electric telescopic rod, eliminating the need for manual operation and effectively improving cleaning efficiency. At the same time, it can avoid damage to the surface of the rolling wheel caused by improper manual operation, thus extending the service life of the rolling wheel. Since the scraper is set at an angle and a collection box is provided below, the scraped asphalt can be directly discharged into the collection box along the scraper, which facilitates the subsequent centralized cleaning of asphalt.

[0015] In summary, the wheel rolling device of the rut sample forming machine of this utility model can achieve the advantages of efficient cleaning of the rolling wheel, improved cleaning effect, extended rolling wheel life, and reduced manual operation by using the first electric telescopic rod to drive the scraper to automatically scrape off the asphalt, and the deep cleaning mechanism to spray cleaning agent to perform secondary cleaning of the rolling wheel. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main sectional view of the wheel rolling device of a rut sample forming machine provided by this utility model;

[0017] Figure 2 This is a side sectional view of the support frame and collection box provided by this utility model;

[0018] Figure 3 This is an assembly drawing of the driven gear, rack, and second electric telescopic rod provided by this utility model;

[0019] Figure 4 This is an assembly drawing of the first electric telescopic rod, collection box, and scraper provided by this utility model.

[0020] Reference numerals: 1. Molding machine body; 101. Support frame; 102. Hydraulic cylinder; 2. Support frame; 3. Rolling roller; 4. First electric telescopic rod; 5. U-shaped frame; 6. Collection box; 7. Scraper; 8. Drain pipe; 9. Liquid storage box; 10. Water pump; 11. Stirring rod; 12. Protective cover; 13. Bevel gear; 14. Second electric telescopic rod; 15. Rectangular seat; 16. Motor; 17. Collection plate; 18. Water collection box; 19. Driven gear; 20. Third electric telescopic rod; 21. Rack; 22. Guide block; 23. Protective box; 24. Connecting seat; 25. Connecting block; 26. Insert rod. Detailed Implementation

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings are used to distinguish different objects, not to describe a particular order; the terms "inner," "outer," "left," and "right" indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0022] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0023] This utility model embodiment provides a wheel rolling device for a rut specimen forming machine, such as... Figure 1-4 As shown, the wheel rolling device of the rut sample forming machine includes: a support frame 2 mounted on the forming machine body 1, the support frame 2 being connected to the hydraulic cylinder 102 of the forming machine body 1; a rolling wheel 3 mounted inside the support frame 2 for rolling materials; a first electric telescopic rod 4 mounted inside the bracket 101 of the forming machine body 1, the first electric telescopic rod 4 being located on one side of the rolling wheel 3; a U-shaped frame 5 mounted below the first electric telescopic rod 4, the bottom of the U-shaped frame 5 being fixedly equipped with a collection box 6 for collecting asphalt scraped from the rolling wheel 3; a scraper 7 fixedly mounted on the top of the collection box 6 and arranged at an incline, the scraper 7 being used to scrape off the asphalt on the rolling wheel 3; and a deep cleaning mechanism mounted on the support frame 2 for secondary cleaning of the rolling wheel 3.

[0024] In this embodiment, when the material is being rolled and molded, the hydraulic cylinder 102 drives the support frame 2 to move downward, causing the rolling wheel 3 to contact the test mold. The driving mechanism of the molding machine body 1 drives the bracket 101 to move, thereby causing the rolling wheel 3 to move along the test mold. At the same time, the hydraulic cylinder 102 adjusts the pressure of the rolling wheel 3 to achieve the rolling of the material. After the rolling is completed, the hydraulic cylinder 102 drives the rolling wheel 3 to move upward away from the test mold.

[0025] Then, the first electric telescopic rod 4 is activated, which drives the U-shaped frame 5 to move downwards. This causes the collection box 6 fixed at the bottom of the U-shaped frame 5 and the scraper 7 fixed at the top of the collection box 6 and set at an angle to move downwards together until the scraper 7 contacts the surface of the roller 3. Then, the roller 3 rotates. During the rotation, the scraper 7 scrapes off the residual asphalt on the roller 3. The scraped asphalt is discharged into the collection box 6 along the angled scraper 7, which is convenient for subsequent centralized cleaning. Compared with the traditional method of manually scraping the residual asphalt on the roller, this roller device automatically scrapes off the asphalt by driving the scraper 7 with the first electric telescopic rod 4, without manual operation, which effectively improves the cleaning efficiency. At the same time, it can avoid damage to the surface of the roller due to improper manual operation and extend the service life of the roller. Because the scraper 7 is set at an angle and there is a collection box 6 below it, the scraped asphalt can be discharged directly into the collection box 6 along the scraper 7, which is convenient for subsequent centralized cleaning of the asphalt.

[0026] In a further preferred embodiment of the present invention, the deep cleaning mechanism includes: a drain pipe 8 fixedly installed inside the support frame 2 for spraying asphalt cleaning agent onto the roller 3; a storage box 9 fixedly installed on the top of the inner wall of the support frame 2 for storing asphalt cleaning agent; and a water pump 10 installed inside the storage box 9 for conveying the cleaning agent to the drain pipe 8, wherein the drain end of the water pump 10 is fixedly connected to the drain pipe 8.

[0027] In this embodiment, after the scraper 7 performs the initial cleaning on the roller 3, the deep cleaning mechanism is activated, and the water pump 10 installed in the liquid storage box 9 starts working, delivering the asphalt cleaning agent stored in the liquid storage box 9 through its drain end to the drain pipe 8, which is fixedly connected to the drain end of the water pump 10. The drain pipe 8 sprays the asphalt cleaning agent onto the surface of the roller 3. After spraying, it is left to stand for a period of time to allow the asphalt cleaning agent to fully soften the residual asphalt on the surface of the roller 3. After standing, the first electric telescopic rod 4 is activated again to drive the scraper 7 to move down and contact the surface of the roller 3, causing the roller 3 to rotate. Following the aforementioned initial cleaning method, the scraper 7 is used to perform deep cleaning on the softened asphalt. The scraped asphalt is discharged into the collection box 6 along the inclined scraper 7. By spraying asphalt cleaning agent to soften the asphalt, and then using the scraper 7 for secondary cleaning, the residual asphalt on the surface of the roller 3 can be removed more thoroughly, effectively improving the cleaning effect.

[0028] In a further preferred embodiment of the present invention, a stirring rod 11 for mixing cleaning agents is rotatably installed inside the liquid storage box 9, a protective cover 12 is fixedly installed on one side of the liquid storage box 9, a handle is rotatably installed on one side of the protective cover 12, and bevel gears 13 are fixedly sleeved on both the handle and the stirring rod 11, and the two bevel gears 13 mesh with each other.

[0029] In this embodiment, when the cleaning agent needs to be stirred, the operator rotates the handle on one side of the protective cover 12. Both the handle and the stirring rod 11 are fixedly fitted with meshing bevel gears 13. Rotating the handle drives the bevel gear 13 connected to it to rotate, which in turn drives another bevel gear 13 connected to the stirring rod 11 to rotate. Finally, the stirring rod 11 rotates in the liquid storage box 9 to stir the cleaning agent and prevent the cleaning agent from separating. By setting the stirring rod 11, the separation phenomenon of asphalt cleaning agent after long-term storage can be prevented, ensuring that the cleaning agent composition is uniform.

[0030] In a further preferred embodiment of the present invention, a second electric telescopic rod 14 is fixedly installed on one side of the support frame 2, and a rectangular seat 15 is rotatably installed on both the second electric telescopic rod 14 and the other side of the support frame 2. The two rectangular seats 15 are respectively inserted into the two rotating shafts of the rolling wheel 3. A motor 16 for driving the rolling wheel 3 to rotate is fixedly installed on the support frame 2, and the output shaft of the motor 16 is fixedly connected to the rotating shaft of the rectangular seat 15 located on one side of the support frame 2 through a coupling.

[0031] In this embodiment, when the material needs to be crushed, the hydraulic cylinder 102 drives the support frame 2 to move down, so that the crushing wheel 3 contacts the test mold. At this time, the motor 16 is started, and the motor 16 drives the rectangular seat 15 to rotate synchronously. Since the shaft of the crushing wheel 3 is rectangular and matches the rectangular seat 15, and the two rectangular seats 15 are respectively inserted on the two shafts of the crushing wheel 3, when one side of the rectangular seat 15 rotates, it will drive the shaft of the crushing wheel 3 and the crushing wheel 3 to rotate synchronously. The second electric telescopic rod 14 on the other side of the support frame 2 is fixed on the support frame 2 and is rotatably connected to the rectangular seat 15 on that side. In this way, when the crushing wheel 3 rotates, the second electric telescopic rod 14 will not rotate with it, which plays a role in stabilizing the support. In addition, when replacing the crushing wheel 3, it is only necessary to start the second electric telescopic rod 14 to move the rectangular seat 15 on the second electric telescopic rod 14 away from the shaft of the crushing wheel 3, so that the crushing wheel 3 can be removed, and the disassembly is relatively quick.

[0032] In a further preferred embodiment of the present invention, a collection plate 17 for collecting cleaning agent dripping from the rolling wheel 3 is rotatably installed inside the bracket 101. A collection groove is provided on the top of the collection plate 17, and a connecting pipe is installed at the bottom of the collection groove. A water collection box 18 is detachably installed on the connecting pipe.

[0033] In this embodiment, during the deep cleaning operation of the wheel roller device of the rut sample forming machine, i.e., when spraying asphalt cleaning agent onto the roller 3, some excess cleaning agent will drip from the roller 3. Since the collection plate 17 is rotatably installed inside the bracket 101 and is located below the roller 3, the dripping cleaning agent will fall into the collection groove opened at the top of the collection plate 17. A connecting pipe is installed at the bottom of the collection groove, and a water collection box 18 is detachably installed on the connecting pipe. The cleaning agent flows into the water collection box 18 through the connecting pipe for collection. When the collected cleaning agent needs to be processed, since the water collection box 18 and the connecting pipe are detachably installed, it is convenient for the staff to remove the water collection box 18 from the connecting pipe for subsequent processing of the cleaning agent in the water collection box 18. At the same time, since the connecting pipe of the water collection box 18 is a flexible hose, the water collection box 18 will not rotate at the same time as the collection plate 17, thereby preventing the cleaning agent from being discharged from the water collection box 18.

[0034] In a further preferred embodiment of the present invention, a driven gear 19 is fixedly sleeved on the rotating shaft of the collecting plate 17, a third electric telescopic rod 20 is fixedly installed on one side of the bracket 101, a rack 21 is installed on the third electric telescopic rod 20, and the rack 21 meshes with the driven gear 19.

[0035] In this embodiment, when the rut sample forming machine is preparing to crush the material, the initial state of the collecting plate 17 may be below the crushing wheel 3, which will affect the downward movement of the crushing wheel 3. At this time, the third electric telescopic rod 20 is activated. The third electric telescopic rod 20 drives the rack 21 to move. The movement of the rack 21 will drive the driven gear 19 to rotate, thereby driving the collecting plate 17 to rotate. By controlling the extension and retraction stroke of the third electric telescopic rod 20, the collecting plate 17 is rotated more than 90°, so that the collecting plate 17 is away from the bottom of the crushing wheel 3, providing sufficient space for the subsequent hydraulic cylinder 102 to drive the crushing wheel 3 to move downward.

[0036] In a further preferred embodiment of the present invention, a guide block 22 for guiding the rack 21 is fixedly installed on one side of the bracket 101. The guide block 22 is slidably connected to the rack 21. A protective box 23 is installed on one side of the bracket 101. The protective box 23 covers the rack 21 and the driven gear 19.

[0037] In this embodiment, the rack 21 slides within the guide block 22, which provides a stable guide for the movement of the rack 21, ensuring that the rack 21 can move smoothly in a predetermined direction, thereby accurately driving the driven gear 19 to rotate, so that the collecting plate 17 rotates as required.

[0038] In a further preferred embodiment of this utility model, a connecting seat 24 is fixedly installed on the top of the U-shaped frame 5, and a connecting block 25 is fixedly installed on the bottom end of the first electric telescopic rod 4. The connecting block 25 is slidably connected to the connecting seat 24. A plug rod 26 is inserted into one side of the connecting seat 24. The plug rod 26 slides through the connecting block 25. A metal cover is fixedly installed on the other side of the connecting seat 24. The metal cover is attracted to a magnet at one end of the plug rod 26.

[0039] In this embodiment, when it is necessary to clean the material in the collection box 6, the worker only needs to overcome the attraction between the magnet and the metal cover and pull the plug 26 out of the connector 24. At this time, the connector 25 and the connector 24 lose their connection constraint, and the U-shaped frame 5 (together with the collection box 6) can be separated from the first electric telescopic rod 4 and taken out to clean the material in the collection box 6. Through the detachable connection design of the connector 25, the connector 24 and the plug 26, the collection box 6 can be easily and quickly removed from the first electric telescopic rod 4 for cleaning, which effectively improves the efficiency of the cleaning work.

[0040] In summary, compared with related technologies, this device achieves the advantages of efficient cleaning of the rollers, improved cleaning effect, extended roller life, and reduced manual operation by using a first electric telescopic rod to drive a scraper to automatically scrape off asphalt and a deep cleaning mechanism to spray cleaning agent to perform secondary cleaning of the rollers.

[0041] It should be understood, in the several embodiments provided in this application, that the disclosed apparatus may be implemented in other ways.

[0042] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. A wheel rolling device for a rut specimen forming machine, characterized in that, include: A support frame (2) is provided on the molding machine body (1), and the support frame (2) is connected to the hydraulic cylinder (102) of the molding machine body (1); A crushing wheel (3) for crushing materials is installed inside the support frame (2); A first electric telescopic rod (4) is provided in the bracket (101) of the molding machine body (1), and the first electric telescopic rod (4) is located on one side of the rolling wheel (3); A U-shaped frame (5) is provided below the first electric telescopic rod (4), and a collection box (6) for collecting asphalt scraped from the roller (3) is fixedly installed at the bottom of the U-shaped frame (5). A scraper (7) is fixedly installed on the top of the collection box (6) and is arranged at an angle. The scraper (7) is used to scrape off the asphalt on the roller (3). A deep cleaning mechanism for secondary cleaning of the rolling roller (3) is provided on the support frame (2).

2. The wheel rolling device of the rut specimen forming machine as described in claim 1, characterized in that, The deep cleaning mechanism includes: A drain pipe (8) is fixedly installed inside the support frame (2) for spraying asphalt cleaning agent onto the roller (3); A storage box (9) for storing asphalt cleaning agent is fixedly installed on the top of the inner wall of the support frame (2); A water pump (10) is installed in the liquid storage box (9) to deliver the cleaning agent to the drain pipe (8), and the drain end of the water pump (10) is fixedly connected to the drain pipe (8).

3. The wheel rolling device of the rut sample forming machine as described in claim 2, characterized in that, A stirring rod (11) for mixing cleaning agents is rotatably installed inside the liquid storage box (9). A protective cover (12) is fixedly installed on one side of the liquid storage box (9). A handle is rotatably installed on one side of the protective cover (12). A bevel gear (13) is fixedly sleeved on both the handle and the stirring rod (11). The two bevel gears (13) mesh with each other.

4. The wheel rolling device of the rut specimen forming machine as described in claim 1, characterized in that, A second electric telescopic rod (14) is fixedly installed on one side of the support frame (2). A rectangular seat (15) is rotatably installed on both the second electric telescopic rod (14) and the other side of the support frame (2). The two rectangular seats (15) are respectively inserted into the two rotating shafts of the rolling wheel (3). A motor (16) for driving the rolling wheel (3) to rotate is fixedly installed on the support frame (2). The output shaft of the motor (16) is fixedly connected to the rotating shaft of the rectangular seat (15) located on one side of the support frame (2) through a coupling.

5. The wheel rolling device of the rut specimen forming machine as described in claim 1, characterized in that, The bracket (101) is rotatably installed with a collection plate (17) for collecting cleaning agent dripping from the rolling wheel (3). The top of the collection plate (17) is provided with a collection groove, and the bottom of the collection groove is provided with a connecting pipe. A water collection box (18) is detachably installed on the connecting pipe.

6. The wheel rolling device of the rut specimen forming machine as described in claim 5, characterized in that, A driven gear (19) is fixedly sleeved on the rotating shaft of the collecting plate (17). A third electric telescopic rod (20) is fixedly installed on one side of the bracket (101). A rack (21) is installed on the third electric telescopic rod (20), and the rack (21) meshes with the driven gear (19).

7. The wheel rolling device of the rut specimen forming machine as described in claim 6, characterized in that, A guide block (22) for guiding the rack (21) is fixedly installed on one side of the bracket (101). The guide block (22) is slidably connected to the rack (21). A protective box (23) is installed on one side of the bracket (101). The protective box (23) covers the rack (21) and the driven gear (19).

8. The wheel rolling device of the rut specimen forming machine as described in claim 1, characterized in that, A connecting seat (24) is fixedly installed on the top of the U-shaped frame (5), and a connecting block (25) is fixedly installed on the bottom end of the first electric telescopic rod (4). The connecting block (25) is slidably connected to the connecting seat (24). A plug rod (26) is inserted into one side of the connecting seat (24). The plug rod (26) slides through the connecting block (25). A metal cover is fixedly installed on the other side of the connecting seat (24). The metal cover is attracted to a magnet at one end of the plug rod (26).