Moving device of vehicle-mounted core drilling machine

Abstract

The moving device of the vehicle-mounted core drilling machine comprises telescopic sliding rails and universal moving devices matched with the telescopic sliding rails, the telescopic sliding rails are arranged at the positions, close to the tops, of the inner walls of the two sides of a compartment and are parallel to the bottom of the compartment, and a sliding block is arranged in each sliding rail; the universal moving device comprises a linear sliding rail, an annular sliding rail and a longitudinal telescopic mechanism. A pair of first sliding seats is arranged at the two ends of the linear sliding rail, the two ends of the linear sliding rail are each installed on one first sliding seat, and the first sliding seats can be locked and fixed to the annular sliding rail. The longitudinal telescopic mechanism comprises a longitudinal telescopic sleeve rod, one end of the longitudinal telescopic sleeve rod is fixed to the end, away from the inner side of the compartment, of the sliding block, the other end of the longitudinal telescopic sleeve rod is rotationally connected to one point on the periphery of the annular sliding rail, and the sliding block can make the whole universal moving device move out of the compartment. The core drilling machine is installed on a second sliding seat arranged in the middle of the linear sliding rail, and the second sliding seat can enable the core drilling machine to move along the linear sliding rail.

Description

Technical Field

[0001] This utility model relates to the field of core drilling machines, and more particularly to a mobile device for a vehicle-mounted core drilling machine. Background Technology

[0002] In the critical considerations of pavement structure design, the thickness and integrity of each structural layer are crucial to the overall stability and durability of the road. Statistics show that many roads suffer severe damage such as large-area potholes and cracks well before reaching their design lifespan. These problems are often attributed to insufficient thickness of the structural layers or structural defects. These defects not only drastically reduce the road's load-bearing capacity but also lead to high subsequent maintenance and repair costs. Therefore, conducting high-standard quality assessments of the structural layers during pavement engineering acceptance and monitoring is particularly necessary to prevent these problems and save on maintenance costs.

[0003] Traditionally, core drilling is an important method for assessing the condition of road structures. By directly drilling core samples from the road surface, the thickness of structural layers and potential defects can be directly verified. This method relies on concrete core drilling machines, typically powered by diesel or gasoline, and operated with a core sampling cylinder. However, the core drilling machines commonly found in the current market are generally bulky and inconvenient to operate, requiring at least four people to work together to carry them on-site, making the process cumbersome and inefficient.

[0004] To address the aforementioned challenges, attempts have been made to improve coring machines through vehicle-mounted designs to reduce transportation burdens. While this has alleviated transportation difficulties to some extent, new problems have emerged: during sampling, the driver needs to frequently adjust the vehicle's position to ensure the accuracy of the sampling points, which undoubtedly reduces operational efficiency. Furthermore, vehicle-mounted coring machines are inadequate in dealing with specific terrains or space-constrained areas, limiting their versatility and flexibility. Therefore, balancing convenience and efficiency while overcoming geographical limitations has become a new challenge for improving road surface inspection technology.

[0005] As mentioned in Chinese Patent CN202222081842.7, a mobile support device for a vehicle-mounted coring machine relates to the field of coring machine support structure technology. It includes: a longitudinal slide rail, comprising a fixed longitudinal slide rail and a tilting longitudinal slide rail. The inner end of the fixed longitudinal slide rail is fixed to the construction vehicle, and the inner end of the tilting longitudinal slide rail is hinged to the outer end of the fixed longitudinal slide rail. Both the tilting and fixed longitudinal slide rails have longitudinal grooves, with the longitudinal groove of the tilting longitudinal slide rail corresponding to the longitudinal groove on the fixed longitudinal slide rail; a transverse slide rail, slidably connected within the longitudinal groove, and having a transverse groove; and a base plate, slidably connected to the transverse groove, which can be used to fix the coring machine. This invention allows for adjustment of the coring machine's position without manual handling, and the entire device can be folded and placed inside the construction vehicle, occupying minimal space.

[0006] However, the above technologies have the following problems: 1. Drilling and sampling can only be performed in a straight line, and cannot sample within a plane. If samples need to be collected from both sides of the track, the machine still needs to be moved. 2. The above technologies are only suitable for flat roads. If the road is uneven or at the junction of a slope and the road surface, the core drilling machine cannot drill perpendicularly to the road surface. If it cannot be perpendicular to the ground, it may cause uneven force on the drill bit, resulting in damage to the drill bit or the machine.

[0007] To address the aforementioned technical issues, this utility model provides a mobile device for a vehicle-mounted core drilling machine installed on the inner walls of both sides of a vehicle compartment. By mounting the vehicle-mounted core drilling machine on the mobile device, the machine can be easily removed from the vehicle compartment, and its angle and position can be adjusted. Utility Model Content

[0008] To address the shortcomings of existing technologies, this utility model provides a mobile device for a vehicle-mounted core drilling machine. This solves the problems of existing technologies, which can only sample along a straight line and cannot sample within a plane. If samples need to be collected from both sides of the track, the vehicle still needs to be moved. Furthermore, existing technologies are only applicable to flat roads. If the road is uneven or at the junction of a slope and the road surface, the core drilling machine cannot drill perpendicularly to the road surface. If it cannot be perpendicular to the ground, it may cause uneven force on the drill bit, resulting in damage to the drill bit or the machine.

[0009] A mobile device for a vehicle-mounted core drilling machine includes a telescopic slide rail and a universal moving device configured to cooperate with the telescopic slide rail, wherein the universal moving device allows the core drilling machine to move in multiple directions.

[0010] The telescopic slide rails are installed on the inner walls of both sides of the carriage near the top and parallel to the bottom of the carriage, and each slide rail is equipped with a slider.

[0011] The omnidirectional moving device includes a linear slide rail, a circular slide rail, and a longitudinal telescopic mechanism; a pair of first slide blocks are provided at both ends of the linear slide rail, and each end of the linear slide rail is mounted on a first slide block, and the first slide blocks can be locked and fixed on the circular slide rail;

[0012] The longitudinal telescopic mechanism includes a longitudinal telescopic sleeve rod with one end fixed to the end of the slider away from the inside of the carriage, and fixed on the side of the slider facing the other side of the carriage. The other end of the longitudinal telescopic sleeve rod is rotatably connected to a point on the outer periphery of the annular slide rail. The slider can move the entire universal moving device out of the carriage and can be locked at any point in the telescopic slide rail.

[0013] The core extractor is mounted on a second slide block located in the middle of the linear slide rail. The second slide block allows the core extractor to move along the linear slide rail and can be locked at any point on the linear slide rail.

[0014] Furthermore, the telescopic slide rail is a C-shaped track, and several stabilizing ribs are provided on the upper and lower sides of the C-shaped track along the sliding direction of the track to increase the contact area between the track and the side wall of the carriage. The stabilizing ribs are fixed to the side wall of the carriage.

[0015] A limit stop is provided at the end of the C-shaped track away from the omnidirectional moving device, and a limit stop is also provided in the middle of the C-shaped track. The upper and lower ends of the limit stop are bent toward one side of the carriage side wall, and several bolts are provided at the bend to fix the limit stop. A buffer protrusion is installed on the side of the slider away from the C-shaped track along the slider movement direction. The buffer protrusion cooperates with the limit stop to limit the slider.

[0016] Furthermore, the telescopic sleeve is divided into two parts: a fixed sleeve and a telescopic rod. The outer side of the fixed sleeve is fixedly connected to the side of the slider that is away from the C-shaped slide rail. The fixed sleeve has stabilizing forks on both sides, and the other end of the stabilizing fork is fixedly connected to the side of the slider that is away from the C-shaped slide rail.

[0017] Furthermore, the bottom of the fixed sleeve is provided with a first limiting flange protruding inward, and the upper end of the telescopic rod is provided with a second limiting flange protruding outward. The fixed sleeve and the telescopic rod are provided with several vertical fixing holes, through which pins can be inserted.

[0018] Furthermore, a disc lock plate is provided at the rotatable connection between the annular slide rail and the longitudinal telescopic sleeve. The disc lock plate has a plurality of first positioning holes arranged in a circular array. The longitudinal telescopic sleeve is provided with a second positioning hole that cooperates with it. The annular slide rail can rotate around the straight line formed by the two rotatable connection points as an axis. The first positioning hole and the second positioning hole cooperate to fix the annular slide rail at a specified angle.

[0019] Furthermore, the first slide includes an annular guide rail slider and a first mounting plate mounted on the annular guide rail slider. The first mounting plate has a threaded hole, and a rubber-headed bolt is screwed into the bolt hole. The rubber head is located at the lower end of the first mounting plate. After tightening, it can press against the top surface of the annular slide rail to lock the first slide.

[0020] Furthermore, the second slide includes a linear guide slider and a second mounting plate mounted on the linear guide slider. The second mounting plate has a threaded hole, and a rubber-headed bolt is screwed into the bolt hole. The rubber head is located at the lower end of the mounting plate. After tightening, it can press against the top surface of the annular slide rail to lock the second slide.

[0021] Furthermore, the mounting plate is hinged to a retractable stabilizing bracket on the side away from the center of the annular guide rail.

[0022] Furthermore, the slider has a rubber head bolt mounting plate protruding from the opening of the C-shaped slide rail at one end facing away from the C-shaped track. The mounting plate extends to the upper and lower sides and bends towards the upper and lower side walls of the C-shaped slide rail. After bending, it is parallel to the upper and lower side walls. A rubber head bolt is provided at the parallel position. One end of the rubber head bolt is a rubber head. After the rubber head bolt is installed, the rubber head is pressed against the upper and lower sides of the C-shaped slide rail respectively.

[0023] This invention has the following advantages: Addressing the limitation that drilling and sampling can only be performed in a straight line, this device features a circular slide rail with a rotatable linear slide rail on top. This allows the core drill mounted on the linear slide rail to move freely within a plane, enabling core drilling at any point without moving the vehicle. Existing technologies are only suitable for flat roads. If the road is uneven or at the junction of a slope and the road surface, the core drill cannot drill perpendicularly into the road surface. This device adjusts the angle of the circular slide rail via a disc lock, ensuring the drill bit is perpendicular to the bottom surface, thus preventing damage caused by uneven force due to the drill bit not being perpendicular to the bottom surface. Attached Figure Description

[0024] Figure 1 This is an overall structural diagram of the present invention;

[0025] Figure 2 This is a schematic diagram showing the positional relationship between the telescopic slide rail and the slider of this utility model;

[0026] Figure 3 This is a schematic diagram of the universal moving device of this utility model;

[0027] Figure 4 This is a schematic diagram of the rubber head bolt of this utility model;

[0028] Figure 5 This is an assembly drawing for use of this utility model;

[0029] Figure 6 This is a schematic diagram of the longitudinal telescopic sleeve structure of this utility model;

[0030] Figure 7 This is a schematic diagram of the first slide and the second slide of this utility model.

[0031] In the above-mentioned attached figures: 1. Carriage; 2. Core extractor; 3. Telescopic slide rail; 31. Stabilizing rib; 32. Limiting block; 4. Universal moving device; 41. Linear slide rail; 411. First slide block; 42. Circular slide rail; 43. Longitudinal telescopic mechanism; 431. Longitudinal telescopic sleeve; 432. Slider; 433. Buffer protrusion; 412. Second slide block; 4311. Fixed sleeve; 4312. Telescopic rod; 4312. First limiting flange; 435. Second limiting flange; 436. Fixing hole; 423. Disc lock plate; 424. First positioning hole; 425. Second positioning hole; 413. First mounting plate; 414. Second mounting plate; 416. Stabilizing bracket; 4321. Rubber head bolt mounting plate; 5. Rubber head bolt; 4313. Stabilizing fork; 426. Circular guide rail slider; 417. Linear guide rail slider. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0033] like Figure 5 and Figure 1 The mobile device of a vehicle-mounted core drilling machine installed in a carriage 1 is shown, including a telescopic slide rail 3 and a universal moving device 4 arranged in conjunction with the telescopic slide rail 3. The universal moving device 4 causes the core drilling machine 2 to move in multiple directions.

[0034] like Figure 5 and Figure 1 , Figure 2 As shown, the telescopic slide rail 3 is located on the inner walls of both sides of the carriage 1 near the top and parallel to the bottom of the carriage 1. Preferably, the telescopic slide rail 3 is a C-shaped track. Several stabilizing ribs 31 are provided on the upper and lower sides of the C-shaped track along the sliding direction of the track to increase the contact area between the track and the side wall of the carriage 1. The stabilizing ribs 31 are fixed on the side wall of the carriage 1. Preferably, a limit stop 32 is provided at the end of the C-shaped track away from the universal moving device 4. A limit stop 32 is also provided in the middle of the C-shaped track. The upper and lower ends of the limit stop 32 are bent toward the side wall of the carriage 1. Several bolts are provided at the bend to fix the limit stop 32. A buffer protrusion 433 is installed on the side of the slider 432 away from the C-shaped track along the movement direction of the slider 432. The buffer protrusion 433 cooperates with the limit stop 32 to limit the slider 432.

[0035] like Figure 1 , Figure 3 , Figure 7As shown, the omnidirectional moving device 4 includes a linear slide rail 41, a circular slide rail 42, and a longitudinal telescopic mechanism 43; a pair of first slide blocks 411 are provided at both ends of the linear slide rail 41, and each end of the linear slide rail 41 is mounted on a first slide block 411, and the first slide blocks 411 can be locked and fixed on the circular slide rail 42.

[0036] like Figure 1 and Figure 2 As shown, the longitudinal telescopic mechanism 43 includes a pair of sliders 432 arranged in the telescopic slide rails 3 on both sides. One end of each slider 432 facing away from the C-shaped track has a rubber-headed bolt mounting plate 4321 protruding from the opening of the C-shaped slide rail. The mounting plate extends upwards and downwards and bends towards the side walls of the C-shaped slide rail, becoming parallel to the side walls after bending. Rubber-headed bolts 5 are installed at the parallel points. Figure 4 As shown, one end of the rubber-headed bolt 5 is a rubber head. After installing the rubber-headed bolt 5, the rubber head presses against the upper and lower sides of the C-shaped slide rail to lock the slider 432. Additionally, a positioning hole is provided at the other end of the slider 432, and a positioning hole is also provided on the C-shaped slide rail. When the slider 432 is in the retracted state, the two positioning holes overlap and a pin is inserted to prevent the slider 432 from sliding during transportation. Figure 1 and Figure 6 As shown, the longitudinal telescopic mechanism 43 further includes a longitudinal telescopic sleeve 431 with one end fixed to the end of the slider 432 away from the inner side of the carriage 1, and fixed to the side of the slider 432 facing the other side of the carriage 1. The other end of the longitudinal telescopic sleeve 431 is rotatably connected to the tangents on both sides of the outer circumference and diameter of the annular slide rail 42. The slider 432 can move the entire universal moving device 4 out of the carriage 1 and can be locked at any point in the telescopic slide rail 3. Preferably, the telescopic sleeve is divided into two parts: a fixed sleeve 4311 and a telescopic rod 4312. The outer side of the fixed sleeve 4311 is fixedly connected to the side of the slider 432 away from the C-shaped slide rail. The fixed sleeve 4311 is provided with stable forks 4313 on both sides. The other end of the stable forks 4313 is fixedly connected to the side of the slider 432 away from the C-shaped slide rail. Furthermore, the bottom of the fixed sleeve 4311 is provided with a first limiting flange 434 protruding inward, and the upper end of the telescopic rod 4312 is provided with a second limiting flange 435 protruding outward. The fixed sleeve 4311 and the telescopic rod 4312 are vertically provided with several fixing holes 436, through which pins can be inserted. Preferably, as follows... Figure 1 and Figure 3As shown, a disc lock plate 423 is provided at the rotatable connection between the annular slide rail 42 and the longitudinal telescopic sleeve 431. The disc lock plate 423 has a plurality of first positioning holes 424 arranged in a circular array. The longitudinal telescopic sleeve 431 has a second positioning hole 425 that cooperates with it. The annular slide rail 42 can rotate around the straight line formed by the two rotatable connection points as an axis. The first positioning hole 424 and the second positioning hole 425 cooperate to fix the annular slide rail 42 at a specified angle.

[0037] like Figure 7 As shown, preferably, the cross-section of the annular slide rail 42 along the radial tangent direction is I-shaped. The first slide block 411 includes a pair of annular guide rail sliders 426 arranged in the tracks on both sides of the annular slide rail 42 and a first mounting plate 413 mounted above the annular guide rail sliders 426. The first mounting plate 413 has threaded holes, and a rubber-headed bolt 5 is screwed into the bolt holes. The rubber head is located at the lower end of the first mounting plate 413, and after being tightened, it can press against the top surface of the annular slide rail 42 to lock the first slide block 411. Preferably, the second slide block 412 includes a linear guide rail slider 417 and a second mounting plate 414 mounted on the linear guide rail slider 417. The second mounting plate 414 has threaded holes, and a rubber-headed bolt 5 is screwed into the bolt holes. The rubber head is located at the lower end of the mounting plate, and after being tightened, it can press against the top surface of the annular slide rail 42 to lock the second slide block 412.

[0038] like Figure 1 As shown, the core extractor 2 is mounted on a second slide block 412 located in the middle of the linear slide rail 41. The second slide block 412 allows the core extractor 2 to move along the linear slide rail 41, and the second slide block 412 can be locked at any point on the linear slide rail 41.

[0039] like Figure 1 As shown, preferably, the first mounting plate 413 is hinged to a retractable stabilizing bracket 416 on the side away from the center of the annular slide rail 42, which facilitates fixing the annular slide rail 42.

[0040] It should be noted that the telescopic slide rail 3 of this device adopts the existing heavy-duty slide rail. The load-bearing capacity of a single heavy-duty slide rail can meet the standard of supporting the universal moving device 4 in this device. In addition, the core extractor 2 is not described in detail in this utility model. The energy required for its operation and the water pump required for drilling are not specified. However, the generator and water pump can be installed in the carriage 1.

[0041] Before use, the slider 432 in the telescopic slide rail 3 is in a retracted state, meaning the entire device is inside the carriage 1. Before the vehicle travels, ensure all locking and clamping mechanisms are locked. Upon arrival at the sampling location, first loosen the rubber head bolts 5 on the slider 432 in the C-shaped slide rail to allow the slider 432 to move freely. At this point, the universal moving device 4 can be moved out of the carriage 1. After moving it out, tighten the rubber head bolts 5. Then, lower the stabilizing bracket 416 hinged to the second mounting plate 414, and remove the pin in the longitudinal telescopic sleeve 431 to lower the telescopic rod 4312. After lowering, adjust the angle of the annular slide rail 42 and the core extractor 2 on the linear slide rail according to the required sampling points. The linear slide rail 41 is positioned on the plane of the annular slide rail 42 and rotates around its center, allowing the core extractor 2 to move freely within the plane of the annular slide rail 42. After adjustment, the disc lock 423 needs to be fixed, and the first slide block 411 and the second slide block 412 need to be fixed by tightening the rubber head bolts 5. After all moving parts are fixed, core extraction can begin. After core extraction at one point, the drill bit can be retracted to loosen the rubber head bolts 5 of the first slide block 411 and the second slide block 412, and the core extractor 2 can be moved to take samples within the annular slide rail 42. Samples can be taken again without moving the vehicle. After use, the slide rail slider 432 and the fixing device can be restored in sequence. The fully extended state of this device is as follows: Figure 5 As shown.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A mobile device for a vehicle-mounted core drilling machine, characterized in that: Includes a telescopic slide rail (3) and a universal moving device (4) configured to cooperate with the telescopic slide rail (3), wherein the universal moving device (4) causes the core extractor (2) to move in multiple directions; The telescopic slide rail (3) is located on the inner walls of both sides of the carriage (1) near the top and parallel to the bottom of the carriage (1), and each slide rail is provided with a slider (432); The omnidirectional moving device (4) includes a linear slide rail (41), a circular slide rail (42), and a longitudinal telescopic mechanism (43); the linear slide rail (41) has a pair of first slide blocks (411) at both ends, and each end of the linear slide rail (41) is mounted on a first slide block (411), and the first slide blocks (411) can be locked and fixed on the circular slide rail (42); The longitudinal telescopic mechanism (43) includes a longitudinal telescopic sleeve (431) with one end fixed to the inner side of the slider (432) away from the carriage (1), and it is fixed on the side of the slider (432) facing the other side of the carriage (1). The other end of the longitudinal telescopic sleeve (431) is rotatably connected to a point on the outer periphery of the annular slide rail (42). The slider (432) can move the entire universal moving device (4) out of the carriage (1) and can be locked at any point in the telescopic slide rail (3). The core extractor (2) is mounted on a second slide block (412) located in the middle of the linear slide rail (41). The second slide block (412) allows the core extractor (2) to move along the linear slide rail (41), and the second slide block (412) can be locked at any point on the linear slide rail (41).

2. The mobile device for a vehicle-mounted core drilling machine according to claim 1, characterized in that: The telescopic slide rail (3) is a C-shaped track. Several stabilizing ribs (31) are provided on the upper and lower sides of the C-shaped track along the sliding direction of the slide rail to increase the contact area between the slide rail and the side wall of the carriage (1). The stabilizing ribs (31) are fixed on the side wall of the carriage (1).

3. The mobile device for a vehicle-mounted core drilling machine according to claim 2, characterized in that: A limit stop (32) is provided at one end of the C-shaped track away from the universal moving device (4). A limit stop (32) is also provided in the middle of the C-shaped track. The upper and lower ends of the limit stop (32) are bent toward the side wall of the carriage (1). Several bolts are provided at the bend to fix the limit stop (32). A buffer protrusion (433) is installed on the side of the slider (432) away from the C-shaped track along the movement direction of the slider (432). The buffer protrusion (433) cooperates with the limit stop (32) to limit the slider (432).

4. The mobile device for a vehicle-mounted core drilling machine according to claim 1 or 3, characterized in that: The telescopic sleeve is divided into two parts: a fixed sleeve (4311) and a telescopic rod (4312). The outer side of the fixed sleeve (4311) is fixedly connected to the side of the slider (432) away from the C-shaped slide rail. The fixed sleeve (4311) is provided with a stabilizing fork (4313) on both sides. The other end of the stabilizing fork (4313) is fixedly connected to the side of the slider (432) away from the C-shaped slide rail.

5. The mobile device for a vehicle-mounted core drilling machine according to claim 4, characterized in that: The bottom of the fixed sleeve (4311) is provided with a first limiting flange (434) protruding inward, and the upper end of the telescopic rod (4312) is provided with a second limiting flange (435) protruding outward. The fixed sleeve (4311) and the telescopic rod (4312) are provided with a plurality of fixing holes (436) vertically, through which pins can be inserted.

6. The mobile device for a vehicle-mounted core drilling machine according to claim 1, characterized in that: A disc lock plate (423) is provided at the rotatable connection between the annular slide rail (42) and the longitudinal telescopic sleeve (431). The disc lock plate (423) has a plurality of first positioning holes (424) arranged in a circular array. The longitudinal telescopic sleeve (431) has a second positioning hole (425) that cooperates with it. The annular slide rail (42) can rotate around the straight line formed by the two rotatable connection points as an axis. The first positioning hole (424) and the second positioning hole (425) cooperate to fix the annular slide rail (42) at a specified angle.

7. The mobile device for a vehicle-mounted core drilling machine according to claim 1, characterized in that: The first slide block (411) includes an annular guide rail slider (426) and a first mounting plate (413) mounted on the annular guide rail slider (426). The first mounting plate (413) has a threaded hole and a rubber head bolt (5) is screwed into the bolt hole. The rubber head is located at the lower end of the first mounting plate (413). After being tightened, it can press against the top surface of the annular slide rail (42) to lock the first slide block (411).

8. The mobile device for a vehicle-mounted core drilling machine according to claim 1, characterized in that: The second slide block (412) includes a linear guide slider (417) and a second mounting plate (414) mounted on the linear guide slider (417). The second mounting plate (414) has a threaded hole and a rubber head bolt (5) is screwed into the bolt hole. The rubber head is located at the lower end of the mounting plate. After tightening, it can press against the top surface of the annular slide rail (42) to lock the second slide block (412).

9. The mobile device for a vehicle-mounted core drilling machine according to claim 7, characterized in that: The first mounting plate (413) is hinged to a retractable stabilizing bracket (416) on the side away from the center of the annular slide rail (42).

10. The mobile device for a vehicle-mounted core drilling machine according to claim 4, characterized in that: The slider (432) has a rubber head bolt (5) mounting plate (4321) protruding from the opening of the C-shaped slide rail on one end of the side facing away from the C-shaped track. The mounting plate extends to the upper and lower sides and bends towards the upper and lower side walls of the C-shaped slide rail. After bending, it is parallel to the upper and lower side walls. A rubber head bolt (5) is set at the parallel position. After tightening the rubber head bolt (5), the rubber head presses against the upper and lower sides of the C-shaped slide rail respectively.

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