Bidirectional guide mechanism and tread brake test system

Abstract

The invention discloses a bidirectional guide mechanism and a tread brake test system. The bidirectional guide mechanism is used to allow a simulation wheel to move in the X-axis direction and the Y-axis direction. The simulation wheel is fixed to the front end of a rocker arm. The bidirectional guide mechanism comprises: a fixed frame, which is fixedly arranged; a first movable frame, which is arranged in the fixed frame and can move relative to the fixed frame in the Y-axis direction through a first guide component; a second movable frame, which is arranged in the first movable frame and can move relative to the first movable frame in the X-axis direction through a second guide component; the second movable frame has two mounting plates opposite to each other in the Y-axis direction, and the front end of the rocker arm passes through the two mounting plates so that the wheel surface of the simulation wheel faces the brake shoe of the brake; the rocker arm is pivoted between the two mounting plates, and the pivot center of the rocker arm pivoted to the mounting plates is coaxial with the axis of the wheel surface of the simulation wheel.

Description

Technical Field

[0001] The invention relates to the technical field of non-standard equipment design, and in particular to a bidirectional guide mechanism and a tread brake test system. Background Art

[0002] Tread braking is a typical braking method. The braking force generated by tread braking comes from the friction between the brake shoe and the wheel surface of the moving vehicle. Tread braking is widely used in moving vehicles such as locomotives, passenger and freight cars, and urban rail transit vehicles.

[0003] It is easy to understand that it is necessary to use a test bench (device) to simulate the tread brake to brake the wheel and thereby predict the braking effect. However, the test bench used to simulate the braking process in the prior art can only simulate the braking process of the wheel under simple operating conditions of the wheel, for example, it can only simulate the braking process of the wheel when the vehicle is traveling in a straight line. However, in the actual braking process, the brake may need to brake the wheel in different states, for example, the brake brakes the wheel in an impact state, and for another example, the brake brakes the wheel in a lateral displacement state (the vehicle reversing may cause the wheel to lateral displacement). However, it is difficult for the test bench in the prior art to simulate the braking process when the wheel is in the above state. Summary of the invention

[0004] In view of the above problems existing in the prior art, an object of the present invention is to provide a bidirectional guide mechanism and a tread brake test system to solve the problems in the prior art.

[0005] In order to achieve the above object, the present invention adopts the following scheme.

[0006] A bidirectional guide mechanism, the bidirectional guide mechanism is used to allow a simulation wheel to move in the X-axis direction and the Y-axis direction, the simulation wheel is fixed to the front end of the rocker arm, and the bidirectional guide mechanism includes:

[0007] a fixed frame, its fixed setting;

[0008] A first movable frame, which is disposed in the fixed frame and can move relative to the fixed frame in the Y-axis direction through a first guide component;

[0009] A second movable frame is arranged in the first movable frame and can move relative to the first movable frame in the X-axis direction through the second guide component; wherein:

[0010] The second moving frame has two mounting plates that are opposite to each other in the Y-axis direction, and the front end of the rocker arm passes through the two mounting plates so that the wheel surface of the simulated wheel faces the brake shoe of the brake;

[0011] The rocker arm is pivotally connected between the two mounting plates, and the pivot center of the rocker arm pivotally connected to the mounting plates is coaxial with the axis of the wheel surface of the simulation wheel;

[0012] The X-axis and the Y-axis are located in a horizontal plane and are perpendicular to each other.

[0013] Preferably, the first guiding component includes a slide rail and a slider installed at least between the first movable frame and the fixed frame, and the slide rail extends along the Y-axis direction.

[0014] Preferably, the second guide component comprises a guide shaft installed on the first movable frame and arranged along the X-axis direction, and the guide shaft passes through the second movable frame.

[0015] The invention also discloses a tread brake test system, comprising:

[0016] A rocker arm is arranged along the X-axis direction, and a simulation wheel is fixed to the front end of the rocker arm;

[0017] A mounting seat, which is arranged in front of the rocker arm, a brake is mounted on the mounting seat and a brake shoe of the brake faces the wheel surface of the simulated wheel;

[0018] The above-mentioned two-way guide mechanism, the rocker arm passes through two mounting plates of the second movable frame in the two-way guide mechanism and is pivotally connected to the two mounting plates, and the pivot center of the rocker arm pivotally connected to the mounting plates is coaxial with the axis of the wheel surface of the simulation wheel;

[0019] a rotational impact applying mechanism, which is arranged at the rear end of the rocker arm, and is used to drive the rear end of the rocker arm in the Z-axis direction so that the simulation wheel rotates around the pivot center, and at the same time, periodically drives the rear end of the rocker arm in the X-axis direction so that the simulation wheel is in an impacted state;

[0020] A lateral movement applying mechanism is arranged on one side of the bidirectional guide mechanism in the Y-axis direction, and the lateral movement applying mechanism is used to drive the first movable frame in the bidirectional guide mechanism to move in the Y-axis direction so that the simulated wheel moves laterally relative to the brake shoe of the brake, wherein:

[0021] The Z axis is perpendicular to the X axis and the Y axis.

[0022] Preferably, the rocker arm includes a front arm section and a rear arm section, the front end of the rear arm section is provided with two relative limit plates, the rear end of the forearm section is between the two limit plates, and the thickness of the rear end of the forearm section is less than the distance between the two limit plates to allow the forearm section to move laterally in the Y-axis direction relative to the rear arm section.

[0023] Preferably, the traverse applying mechanism comprises:

[0024] A lateral movement holding seat, on which a lead screw arranged along the X-axis direction is provided, a nut block is sleeved on the lead screw, and the nut block cooperates with a slide rail formed on the lateral movement holding seat, so that the nut block can be driven by the lead screw to adjust its position in the X-axis direction;

[0025] The cylinder has two ends pivotally connected to the nut block and the first moving frame respectively.

[0026] Preferably, the tread brake test system further comprises a guide positioning seat, wherein the guide positioning seat is located between the bidirectional guide mechanism and the rotation impact applying mechanism; wherein:

[0027] The guide positioning seat is provided with a rectangular through slot, the rocker arm passes through the rectangular through slot, and the two limit plates of the rear arm section are located in the rectangular through slot, and the slot wall of the rectangular through slot limits the movement of the rear arm section in the Y-axis direction.

[0028] Preferably, the bidirectional guiding mechanism further includes a displacement sensor for detecting the displacement of the first movable frame in the Y-axis direction.

[0029] Preferably, in the bidirectional guiding mechanism, stop seats are provided on both sides of the first movable frame in the Y-axis direction to limit the moving stroke of the first movable frame.

[0030] Compared with the prior art, the bidirectional guide mechanism and tread brake test system provided by the present invention have the following advantages:

[0031] 1. The bidirectional guide mechanism in the tread brake system not only has a holding effect on the rocker arm, but also allows the rocker arm to move in the X-axis direction and the Y-axis direction, so that the simulated wheel can simulate the impact and lateral movement of the wheel.

[0032] 2. The vertical driving component drives the vertical holding seat to move vertically to drive the simulated wheel to rotate through the rocker arm, thereby simulating the rotation of the wheel. When the simulated wheel rotates, the driver in the mounting seat drives the brake so that the brake shoe is pressed against the wheel surface of the simulated wheel in a rotating state to simulate the normal braking process of the brake on the wheel.

[0033] 3. While the simulated wheel is driven to rotate by the vertical driving component, the rib shaft is driven to rotate by the rotary driving component so that the simulated wheel receives the impact from the rocker arm, thereby simulating the brake of the wheel when the wheel is impacted.

[0034] 4. While the vertical driving component is used to drive the simulated wheel to rotate, the lateral movement applying mechanism is used to drive the first moving frame to move laterally to drive the simulated wheel to move laterally, thereby simulating the brake of the wheel to brake the wheel when the wheel moves laterally.

[0035] 5. Use the data obtained from the first displacement sensor, the second displacement sensor, and the angular velocity sensor to draw a relationship curve between the braking force, the simulated wheel lateral displacement, and the simulated wheel impact frequency, and use this to determine the braking effect.

[0036] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention.

[0037] This summary of various implementations or examples of the technology described in this disclosure is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In the drawings, which are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar parts. The accompanying drawings generally illustrate various embodiments by way of example and not limitation, and together with the specification and claims, are used to illustrate the embodiments of the invention. When appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.

[0039] Figure 1 A three-dimensional structural view from one perspective of a tread brake testing system provided by an embodiment of the present invention.

[0040] Figure 2 for Figure 1 A magnified view of the local area.

[0041] Figure 3 A three-dimensional structural view from another perspective of the tread brake testing system provided by an embodiment of the present invention.

[0042] Figure 4 for Figure 3 A magnified view of the local area.

[0043] Figure 5 A partial view of the area where the bidirectional guide mechanism of the tread brake test system provided by an embodiment of the present invention is located.

[0044] Figure 6 A front view of a tread brake testing system provided in an embodiment of the present invention.

[0045] Reference numerals:

[0046] 10-frame; 11-working platform; 20-rotating impact applying mechanism; 21-longitudinal moving retaining seat; 211-bottom plate; 212-vertical plate; 22-vertical moving retaining seat; 221-ear plate; 222-long round hole; 223-pin shaft; 23-vertical moving driving component; 24-camshaft; 25-rotary driving component; 26-first displacement sensor; 30-rocker arm; 31-rear arm section; 311-limiting plate; 32-front arm section; 33-arc surface; 40-bidirectional guiding mechanism; 41-first moving frame; 4 2-second movable frame; 421-mounting plate; 43-fixed frame; 441-slide rail; 442-slider; 45-guide shaft; 46-pivot; 47-stop seat; 48-second displacement sensor; 50-mounting seat; 60-guide positioning seat; 61-rectangular through groove; 70-longitudinal adjustment mechanism; 71-base; 72-first lead screw; 80-transverse application mechanism; 81-cylinder; 82-transverse holding seat; 83-second lead screw; 84-nut block; 100-simulation wheel; 200-brake. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0049] In order to keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of well-known functions and well-known components are omitted.

[0050] like Figures 1 to 6As shown, an embodiment of the present invention discloses a tread brake test system, which is dedicated to simulating the process of the brake 200 applying brake to the wheel, and collecting relevant data generated during the braking process to evaluate the braking effect. The system includes: a frame 10 with a working platform 11, a mounting seat 50 for mounting the brake 200, a rocker arm 30, a bidirectional guide mechanism 40, a rotational impact applying mechanism 20, a guide positioning seat 60, a lateral application mechanism 80, and a longitudinal adjustment mechanism 70.

[0051] The rocker arm 30 is arranged along the X-axis direction ( Figure 1 The directions of the X-axis, Y-axis, and Z-axis are shown. In the following text, the X-axis direction is consistent with the longitudinal direction, the Y-axis direction is consistent with the lateral direction, and the Z-axis direction is consistent with the vertical direction). Therefore, the rocker arm 30 has a front end and a rear end in the X-axis direction. The simulated wheel 100 participating in the simulation test is fixed to the front end of the rocker arm 30. Because there is no need to make the entire wheel body participate in the simulation test, the simulated wheel 100 provided by the present invention is actually a sector segment cut from the entire wheel body. The rocker arm 30 includes a front arm section 32 and a rear arm section 31, the simulation wheel 100 is fixed at the front end of the front arm section 32, and the front end of the rear arm section 31 is configured with two limiting plates 311 opposite to each other in the Y-axis direction (i.e., in the horizontal direction), and the rear end of the forearm section 32 extends between the two limiting plates 311, and two guide pins are passed between the limiting plates 311 and the rear end of the forearm section 32, so that the forearm section 32 and the rear arm section 31 are connected and limit the mutual pivoting of the forearm section 32 and the rear arm section 31; so that the distance between the two limiting plates 311 is greater than the thickness of the rear end of the forearm section 32, so that the forearm section 32 can move in the Y-axis direction relative to the rear arm section 31.

[0052] The rotary impact applying mechanism 20, the guide positioning seat 60, the bidirectional guide mechanism 40 and the mounting seat 50 are arranged on the working platform 11 of the frame 10 along the X-axis direction. The specific arrangement positions are as follows: the rotary impact applying mechanism 20 is located at the rear end of the rocker arm 30, the guide positioning seat 60 is located at the intersection between the rear arm section 31 and the front arm section 32 of the rocker arm 30, the bidirectional guide mechanism 40 is located at the front arm section 32 of the rocker arm 30 and the front arm section 32 passes through the bidirectional guide mechanism 40, the mounting seat 50 is located in front of the front arm section 32 of the rocker arm 30, that is, in front of the simulation wheel 100, and the brake 200 participating in the simulation test is installed on the mounting seat 50, and the brake shoe of the brake 200 faces the wheel surface of the simulation wheel 100. The driver (such as a cylinder) in the mounting seat 50 drives the brake 200 to move toward the simulation wheel 100 and makes the brake shoe of the brake 200 press against the wheel surface of the simulation wheel 100, thereby braking the simulation wheel 100.

[0053] like Figure 1As shown, a rectangular through slot 61 is provided on the guide positioning seat 60, and two limiting plates 311 of the rear arm section 31 of the rocker arm 30 are penetrated by the rectangular through slot 61, and the distance between the two slot walls of the rectangular through slot 61 is substantially equal to the distance between the outer plate surfaces of the two limiting plates 311, thereby limiting the movement of the rear arm section 31 in the Y-axis direction and allowing the rocker arm 30 to move in the X-axis direction and the Z-axis direction, so that the front arm section 32 of the rocker arm 30 can move in the Y-axis direction while the rear arm section 31 cannot.

[0054] like Figure 5 Combined with Figure 1 As shown, the bidirectional guide mechanism 40 includes: a fixed frame 43, a first mobile frame 41 and a second mobile frame 42, the fixed frame 43 is fixed on the working platform 11, the first mobile frame 41 is arranged in the fixed frame 43, and the second mobile frame 42 is arranged in the first mobile frame 41. A slide rail 441 and a slider 442 that cooperate with each other are installed between the top of the first mobile frame 41 and the fixed frame 43 and between the bottom of the first mobile frame 41 and the working platform 11, and the slide rail 441 extends along the Y-axis direction, so that the fixed frame 43 allows the first mobile frame 41 to move in the Y-axis direction (that is, allows lateral movement), and at least two guide shafts 45 are arranged on the first mobile frame 41, and the guide shafts 45 are arranged along the X-axis direction. The guide shafts 45 pass through the second mobile frame 42, so that the first mobile frame 41 allows the second mobile frame 42 to move in the X-axis direction (that is, allows longitudinal movement).

[0055] The second movable frame 42 has two mounting plates 421 arranged relative to each other in the Y-axis direction, and the forearm section 32 of the rocker arm 30 passes through the gap between the two mounting plates 421, and a pivot 46 is passed through the mounting plate 421, and the pivot also passes through the forearm section 32, so that the rocker arm 30 can rotate vertically with the pivot 46 as the pivot center. Therefore, the simulation wheel 100 at the front end of the rocker arm 30 can be rotated around the pivot center by driving the rear end of the rocker arm 30 to move vertically, and the position of the pivot center is configured to be coaxial with the axis of the wheel surface of the simulation wheel 100. In this way, the rotation of the wheel is simulated by driving the simulation wheel 100 to rotate around the pivot center.

[0056] like Figure 2 Combined with Figure 1As shown, the rotary impact applying mechanism 20 includes: a longitudinal holding seat 21, a vertical holding seat 22, a vertical driving component 23, a camshaft 24 and a rotary driving component 25. The longitudinal holding seat 21 has a bottom plate 211 and a vertical plate 212 which are perpendicular to each other. The bottom plate 212 can adjust the position of the longitudinal holding seat 21 in the X-axis direction to adapt to the length of the rocker arm 30 through the cooperation of the slider and the slide rail extending in the X-axis direction; the vertical holding seat 22 has a bottom plate and a vertical plate which are perpendicular to each other. The vertical plate of the vertical holding seat 22 and the vertical plate 212 of the longitudinal holding seat 21 can move in the Z-axis direction through the cooperation with the slide rail extending in the Z-axis direction. A cylinder is selected as the vertical driving component 23. The cylinder is located below the working platform 11. The piston rod of the cylinder is connected to the bottom plate of the vertical holding seat 22 to drive the vertical holding seat 22 to move vertically.

[0057] The vertical movement retaining seat 22 is fixed with ear plates 221 opposite to each other in the Y-axis direction, the rear end of the rear arm section 31 of the rocker arm 30 extends between the two ear plates 221, and oblong holes 222 extending in the X-axis direction are provided on the two ear plates 221, and a pin shaft 223 is provided on the rear arm section 31, and the pin shaft 223 passes through the oblong hole 222, so that the rocker arm 30 can pivot relative to the vertical movement retaining seat 22 and can move relative to the vertical movement retaining seat 22 in the X-axis direction. In this way, when the vertical movement driving component 23 drives the vertical movement retaining seat 22 to move vertically, the vertical movement retaining seat 22 can drive the rear end of the rear arm section 31 to move vertically so that the simulated wheel 100 at the front end of the front arm section 32 can rotate.

[0058] The camshaft 24 is installed between the two ear plates 221 of the vertical movement retaining seat 22, and a rotating driving component 25 such as a motor is installed on one side of the ear plate 221 to drive the camshaft 24 to rotate. The rear end of the rear arm section 31 is processed with an arc surface 33, and the arc surface 33 contacts the cam surface. In this way, when the rotating driving component 25 drives the camshaft 24 to rotate, the cam surface of the rib shaft contacts the arc surface 33 at the rear end of the rear arm section 31 and periodically drives the rocker arm 30 to move in the X-axis direction, so that the simulated wheel 100 at the front end of the front arm section 32 is impacted to simulate the impact of the wheel.

[0059] A force sensor (not shown in the drawings) is arranged between the vertical driving component 23 and the vertical holding seat 22. The force sensor can detect the force on the vertical holding seat 22, thereby indirectly obtaining the braking force of the brake 200 on the simulation wheel 100; a first displacement sensor 26 is installed on the longitudinal holding seat 21, and the first displacement sensor 26 is used to detect the displacement and speed of the vertical holding seat 22 in the Z-axis direction to obtain the rotation speed of the simulation wheel 100 at intervals. An angular velocity sensor (not shown in the drawings) is installed inside or outside the rotating driving component 25. The rotation speed of the camshaft 24 is detected by the angular velocity sensor to obtain the impact frequency of the simulation wheel 100.

[0060] like Figure 1 As shown, the longitudinal adjustment mechanism 70 is located at the rear of the vertical movement holding seat 22, and the longitudinal adjustment mechanism 70 is located at the rear of the rotary impact applying mechanism 20 in the X-axis direction. The longitudinal adjustment mechanism 70 includes: a base 71 and a first lead screw 72. The base 71 is fixed on the working platform 11 of the frame 10. A nut sleeve is installed in the base 71. The first lead screw 72 is passed through the nut sleeve and forms a nut sleeve with the nut sleeve. The head of the first lead screw 72 is connected to the back of the vertical plate of the vertical movement holding seat 22. A handle is installed on the back of the first lead screw 72. The first lead screw 72 is screwed by operating the handle to adjust the position of the vertical movement holding seat 22 in the X-axis direction, so that the rotary impact applying mechanism 20 is adapted to the length of the rocker arm 30, so as to facilitate the assembly of the rotary impact applying mechanism 20 and the rear end of the rocker arm 30.

[0061] like Figure 1 and Figure 3As shown, the transverse movement applying mechanism 80 is arranged on one side of the Y-axis direction of the bidirectional guiding mechanism 40, and the transverse movement applying mechanism 80 includes: a transverse movement holding seat 82 and a cylinder 81. The transverse movement holding seat 82 is fixed on the working platform 11 of the frame 10. The transverse movement holding seat 82 is provided with a second lead screw 83 arranged along the X-axis direction. The second lead screw 83 is sleeved with a nut block 84. The nut block 84 cooperates with the slide rail formed on the transverse movement holding seat 82 so that the nut block 84 can be driven by the second lead screw 83 to adjust the position in the X-axis direction. The end of the cylinder body of the cylinder 81 is pivotally connected to the nut block 84, and the end of the piston rod of the cylinder 81 is pivotally connected to the first movable frame 41 of the bidirectional guiding mechanism 40. In this way, the piston rod of the cylinder 81 is extended and retracted to drive the first moving frame 41 to move in the Y-axis direction, thereby driving the forearm section 32 of the rocker 30 to move in the Y-axis direction through the second moving frame 42, thereby driving the simulated wheel 100 to move laterally relative to the brake shoe of the brake 200. A second displacement sensor 48 is installed on the fixed frame 43 of the bidirectional guide mechanism 40, and the second displacement sensor 48 is used to detect the displacement and speed of the first moving frame 41 in the Y-axis direction, thereby indirectly detecting the lateral position and lateral speed of the simulated wheel 100. In addition, by screwing the second lead screw 83 to adjust the position of the nut block 84 in the X-axis direction, the piston rod of the cylinder 81 applies force to the first moving frame 41 in the axial direction of the piston rod as much as possible. Preferably, in the bidirectional guide mechanism 40, stop seats 47 are provided on both sides of the first moving frame 41 in the Y-axis direction to limit the moving stroke of the first moving frame 41, so as to limit the lateral stroke of the simulated wheel 100 to prevent the simulated wheel 100 from moving laterally out of the brake shoe of the brake 200.

[0062] Based on the above, it can be seen that the tread brake test system provided by the present invention has the following functions:

[0063] 1. The vertical movement driving component 23 drives the vertical movement holding seat 22 to move vertically to drive the simulated wheel 100 to rotate through the rocker arm 30, thereby simulating the rotation of the wheel. When the simulated wheel 100 rotates, the driver in the mounting seat 50 drives the brake 200 so that the brake shoe of the brake 200 is pressed against the wheel surface of the simulated wheel 100 in a rotating state to simulate the brake 200 to implement a normal braking process on the wheel.

[0064] 2. While the simulated wheel 100 is driven to rotate by the vertical drive component 23, the rib shaft is driven to rotate by the rotary drive component 25 so that the simulated wheel 100 receives the impact from the rocker arm 30, thereby simulating the brake 200 braking the wheel when the wheel is impacted.

[0065] 3. While the vertical driving component 23 is used to drive the simulated wheel 100 to rotate, the transverse applying mechanism 80 is used to drive the first movable frame 41 to move transversely to drive the simulated wheel 100 to move transversely, thereby simulating that the brake 200 brakes the wheel when the wheel moves transversely.

[0066] 4. Use the data obtained by the first displacement sensor 26, the second displacement sensor 48, and the angular velocity sensor to draw a relationship curve diagram among the braking force, the lateral displacement of the simulated wheel 100, and the impact frequency of the simulated wheel 100, and use this to determine the braking effect.

[0067] In addition, although exemplary embodiments have been described in the present invention, the scope includes any and all embodiments based on the present invention with equivalent elements, modifications, omissions, combinations (e.g., various embodiments intersecting schemes), adaptations or changes. The elements in the claims will be interpreted broadly based on the language adopted in the claims, and are not limited to the examples described in this specification or during the implementation of this application, and their examples will be interpreted as non-exclusive. Therefore, this specification and examples are intended to be considered as examples only, and the true scope and spirit are indicated by the following claims and the full scope of their equivalents.

[0068] The above description is intended to be illustrative rather than restrictive. For example, the above examples (or one or more of them) can be used in combination with each other. For example, a person of ordinary skill in the art can use other embodiments when reading the above description. In addition, in the above-mentioned specific embodiments, various features can be grouped together to simplify the present invention. This should not be interpreted as an intention that a disclosed feature that is not required to be protected is necessary for any claim. On the contrary, the subject matter of the present invention may be less than all the features of a specific disclosed embodiment. Thus, the following claims are incorporated into the specific embodiments as examples or embodiments, wherein each claim is independently used as a separate embodiment, and it is considered that these embodiments can be combined with each other in various combinations or arrangements. The scope of the present invention should be determined with reference to the attached claims and the full scope of equivalent forms granted by these claims.

[0069] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A bidirectional guide mechanism, characterized in that: The bidirectional guide mechanism is used to allow the simulation wheel to move in the X-axis direction and the Y-axis direction. The simulation wheel is fixed to the front end of the rocker arm. The bidirectional guide mechanism includes: a fixed frame, its fixed setting; A first movable frame, which is disposed in the fixed frame and can move relative to the fixed frame in the Y-axis direction through a first guide component; A second movable frame is arranged in the first movable frame and can move relative to the first movable frame in the X-axis direction through the second guide component; wherein: The second moving frame has two mounting plates that are opposite to each other in the Y-axis direction, and the front end of the rocker arm passes through the two mounting plates so that the wheel surface of the simulated wheel faces the brake shoe of the brake; The rocker arm is pivotally connected between the two mounting plates, and the pivot center of the rocker arm pivotally connected to the mounting plates is coaxial with the axis of the wheel surface of the simulation wheel; The X-axis and the Y-axis are located in a horizontal plane and are perpendicular to each other.

2. The bidirectional guide mechanism according to claim 1, characterized in that: The first guiding component includes a slide rail and a slider installed at least between the first movable frame and the fixed frame, and the slide rail extends along the Y-axis direction.

3. The bidirectional guide mechanism according to claim 1, characterized in that: The second guide component includes a guide shaft installed on the first moving frame and arranged along the X-axis direction, and the guide shaft passes through the second moving frame.

4. A tread brake test system, characterized in that: include: A rocker arm is arranged along the X-axis direction, and a simulation wheel is fixed to the front end of the rocker arm; A mounting seat, which is arranged in front of the rocker arm, a brake is mounted on the mounting seat and a brake shoe of the brake faces the wheel surface of the simulated wheel; The bidirectional guide mechanism according to any one of claims 1 to 3, wherein the rocker arm passes through two mounting plates of the second movable frame in the bidirectional guide mechanism and is pivotally connected to the two mounting plates, and the pivot center of the rocker arm pivotally connected to the mounting plates is coaxial with the axis of the wheel surface of the simulation wheel; a rotational impact applying mechanism, which is arranged at the rear end of the rocker arm, and is used to drive the rear end of the rocker arm in the Z-axis direction so that the simulation wheel rotates around the pivot center, and at the same time, periodically drives the rear end of the rocker arm in the X-axis direction so that the simulation wheel is in an impacted state; A lateral movement applying mechanism is arranged on one side of the bidirectional guide mechanism in the Y-axis direction, and the lateral movement applying mechanism is used to drive the first movable frame in the bidirectional guide mechanism to move in the Y-axis direction so that the simulated wheel moves laterally relative to the brake shoe of the brake, wherein: The Z axis is perpendicular to the X axis and the Y axis.

5. The tread brake test system according to claim 4, characterized in that: The rocker arm includes a front arm section and a rear arm section, the front end of the rear arm section is provided with two relative limit plates, the rear end of the forearm section is between the two limit plates, and the thickness of the rear end of the forearm section is less than the distance between the two limit plates to allow the forearm section to move laterally in the Y-axis direction relative to the rear arm section.

6. The tread brake test system according to claim 4, characterized in that: The traverse applying mechanism comprises: A lateral movement holding seat, on which a lead screw arranged along the X-axis direction is provided, a nut block is sleeved on the lead screw, and the nut block cooperates with a slide rail formed on the lateral movement holding seat, so that the nut block can be driven by the lead screw to adjust its position in the X-axis direction; The cylinder has two ends pivotally connected to the nut block and the first moving frame respectively.

7. The tread brake test system according to claim 5, characterized in that: The tread brake test system further includes a guide positioning seat, which is located between the bidirectional guide mechanism and the rotation impact applying mechanism; wherein: The guide positioning seat is provided with a rectangular through slot, the rocker arm passes through the rectangular through slot, and the two limit plates of the rear arm section are located in the rectangular through slot, and the slot wall of the rectangular through slot limits the movement of the rear arm section in the Y-axis direction.

8. The tread brake test system according to claim 4, characterized in that: The bidirectional guiding mechanism also includes a displacement sensor for detecting the displacement of the first moving frame in the Y-axis direction.

9. The tread brake test system according to claim 4, characterized in that: In the bidirectional guiding mechanism, stop seats are provided on both sides of the first moving frame in the Y-axis direction to limit the moving stroke of the first moving frame.

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