Durability testing system, testing method and evaluation method for snowmobile steering assembly

Abstract

The durability test system, test method and evaluation method of the snow vehicle steering assembly relate to the field of snow vehicle testing, and solve the problem of being unable to judge whether the durability of the snow vehicle steering assembly meets the requirements. The test system includes a temperature and humidity environment chamber, two sets of hydraulic actuators, a test bench and a control module; the temperature and humidity environment chamber provides the temperature and humidity environment required for the test for the snow vehicle steering assembly; the hydraulic actuator provides the steering control force for the snow vehicle steering assembly; the control module controls the temperature and humidity environment chamber and the hydraulic actuator to complete the durability test. The snow vehicle steering assembly is placed in a temperature and humidity environment chamber and connected to the test system, and the temperature and humidity are adjusted to the target test temperature and humidity and continuously monitored; the hydraulic actuator is controlled under three working conditions to pull the snow vehicle steering assembly to be tested to achieve steering action, and the test working condition is switched after not less than a specific number of steering times. Check the components of the snow vehicle steering assembly, and if there is no deformation or wear, the durability is qualified. The present invention can be applied to snow vehicle development test work.

Description

Technical Field

[0001] The invention relates to the field of snowmobile testing, and in particular to a steering assembly testing technology for a snowmobile. Background Art

[0002] The bobsleigh event is an ultimate pursuit of speed and technique. It demonstrates the athletes' powerful explosive power, good balance and precise control, giving people a thrilling sensory experience.

[0003] Bobsleigh competitions are speed races in which drivers drive controllable bobsleighs on a curved U-shaped ice track. In order to verify whether the steering durability of competitive bobsleighs meets the requirements, it is necessary to conduct durability tests on the bobsleigh steering assembly. However, during the turning process of the bobsleigh, the gravity of the bobsleigh and the athlete, the centripetal force of the vertical ice surface, and the lateral force between the ice blades and the ice surface are superimposed on each other. The bobsleigh steering assembly is subjected to complex forces, and it is difficult to simulate its force conditions and durability performance through direct loading. At present, the durability testing technology for the steering assembly of competitive bobsleighs is still blank, and it is impossible to effectively judge whether its durability meets the requirements during the development of the bobsleigh. Summary of the invention

[0004] In order to solve the problem that it is impossible to effectively judge whether the durability of a snowmobile meets the requirements during the development of the snowmobile, the present invention proposes a durability testing system, a testing method and an evaluation method for a snowmobile steering assembly.

[0005] The technical solution of the present invention is as follows:

[0006] A durability test system for a snowmobile steering assembly, comprising a temperature and humidity environment chamber, two sets of hydraulic actuators, a test bench and a control module; the temperature and humidity environment chamber is used to provide the temperature and humidity environment required for the test of the snowmobile steering assembly; the hydraulic actuator is used to provide steering control force for the snowmobile steering assembly; the test bench is used to fix the snowmobile steering assembly and simulate the force transmission method of athlete hand loading; the control module is used to control the temperature and humidity environment chamber to change the temperature and humidity, and is also used to control the actuation form of the hydraulic actuator, thereby driving the snowmobile steering assembly to realize steering action and complete the durability test.

[0007] Preferably, the test bench includes an actuator fixed rear bracket, two sets of linear guide devices, a cable guiding mechanism, two steel cables and a snowmobile steering assembly fixing device. The two sets of hydraulic actuators are parallel and horizontal. One end of the hydraulic actuator is connected to the actuator fixed rear bracket, and the other end is connected to the linear guide device. The cable guiding mechanism is composed of a plurality of pulleys and pulley brackets, which are used to adjust the spacing between the two steel cables. One end of the two steel cables is respectively connected to the two sets of linear guides, and the other ends are respectively connected to the two ends of the steering handle of the steering control mechanism of the snowmobile steering assembly. The snowmobile steering assembly fixing device is arranged in a temperature and humidity environment box, and is used to fix the snowmobile steering assembly to be tested.

[0008] Preferably, the two groups of linear guide rail devices are symmetrically arranged, and the linear guide rail device includes a guide rail, a guide rail bearing, a back plate bracket and a vertical bracket, the guide rail bearing is fixed on the back plate bracket, and the back plate bracket is fixed on the vertical bracket.

[0009] Preferably, the steel cable guiding mechanism comprises a first pulley bracket, a pulley, a second pulley bracket and a steel cable, wherein a pulley is fixed on each of the first pulley bracket and the second pulley bracket, so as to reduce the excessive width of the steel cable between the two hydraulic actuators to a size that can pass through a small opening reserved in the temperature and humidity environment box.

[0010] Preferably, the snowmobile steering assembly fixing device includes a snowmobile operating mechanism fixing device, a snowmobile front frame fixing device, a loading device, a hand loading device and an ice surface fixing device. The snowmobile operating mechanism fixing device is used to fix the rebound belt of the snowmobile steering assembly. The loading device performs loading according to different working conditions. The hand loading device is connected to the hydraulic actuator via a steel cable. The ice surface fixing device consists of two identical grooves filled with water. A pressing device is designed at the lower edge of the groove to simulate the contact between the ice skates and the ice surface.

[0011] Preferably, the snowmobile control mechanism fixing device includes a control handle rebound band lower bracket and a control handle rebound band upper bracket, and the control handle rebound band lower bracket and the control handle rebound band upper bracket are both composed of a base plate and a support, and the support is milled with grooves and holes for fixing the rebound band.

[0012] Preferably, the snowmobile front frame fixing device includes a front fixing bracket and a rear fixing bracket, and the bracket is composed of a base plate, a pillar, a small support plate and ribs. The bracket is designed with a rod that limits the horizontal degree of freedom and retains the vertical degree of freedom to ensure that the entire load is loaded on the ice skates.

[0013] Preferably, the loading device consists of a loading fixing rod, a loading plate and a loading fixing bracket. The loading plate is fixed to the loading fixing bracket by the loading fixing rod. The loading plate is designed to be split and can be loaded according to different working conditions. The lower end of the loading fixing bracket consists of a C-shaped bracket and bolts, which are used to clamp the front frame crossbeam.

[0014] The present invention also provides a durability test method for a snowmobile steering assembly. Using the above-mentioned test system, the test method comprises the following steps:

[0015] S1. Place the steering assembly of the snowmobile to be tested in a temperature and humidity environment box, connect it to the test system, adjust the temperature and humidity environment box parameters to the target test temperature and humidity, and continuously monitor;

[0016] S2. Under three different working conditions, respectively, control the hydraulic actuator to pull the steering assembly of the snowmobile to be tested to achieve steering action. When the number of steering times is not less than a specific number of times under the working condition, switch the test working condition.

[0017] The present invention provides a method for evaluating the durability of a snowmobile steering assembly. By applying the above-mentioned test method, each component of the snowmobile steering assembly is checked after the test. If there is no deformation or wear, the durability of the snowmobile steering assembly is qualified, otherwise it is unqualified.

[0018] Compared with the prior art, the present invention solves the problem that it is impossible to effectively judge whether the durability of a snowmobile meets the requirements during its development process. The specific beneficial effects are:

[0019] The test system provided by the present invention adopts soft materials such as steel wires and ropes as force transmission devices to simulate the hand force loading of athletes in the actual steering process, realize the steering simulation test under low temperature, and aim at its complex force conditions to restore the use of the snowmobile steering device to the maximum extent. The front frame fixed bracket limits the horizontal degree of freedom and does not limit the vertical degree of freedom, so that all the loads are loaded on the ice skates; the contact between the ice skates and the ice surface is truly simulated, and the actual use conditions are more realistically restored; the test system and method are highly accurate, fast and efficient, easy to operate, and can perform real-time monitoring.

[0020] The present invention can be applied to snowmobile development test work, filling the technical gap in the durability test of the snowmobile steering assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the test bench described in Example 2;

[0022] Figure 2 This is a schematic diagram of the structure of the bracket after the actuator is fixed in Example 2;

[0023] Figure 3Schematic diagram of the structure of the linear guide device in Example 3;

[0024] Figure 4 Schematic diagram of the steel cable guide mechanism and the steel cable described in Example 4;

[0025] Figure 5 This is a schematic diagram of the spatial relationship between the opening of the temperature and humidity environment box and the steel cable in Example 4;

[0026] Figure 6 It is a schematic diagram of the structure of the steering assembly of the snow vehicle to be tested in Example 1;

[0027] Figure 7 It is a schematic diagram of the snowmobile steering assembly fixing device described in Example 5;

[0028] Figure 8 It is a schematic diagram of the fixing device of the snowmobile control mechanism described in Example 6;

[0029] Fig. 9 This is a schematic diagram of the front frame fixing device of the snowmobile in Example 7;

[0030] Fig.10 This is a schematic diagram of the loading device described in Example 8;

[0031] Fig.11 This is a schematic diagram of the manual force loading device described in Example 5;

[0032] Fig.12 This is a schematic diagram of the ice surface fixing device described in Example 5;

[0033] Fig.13 Schematic diagram of the test method described in Example 9.

[0034] Description of reference numerals:

[0035] 1. Fix the rear bracket of the actuator;

[0036] 2. Linear guide device;

[0037] 2a, guide rail; 2b, linear bearing; 2c, back plate bracket; 2d, vertical bracket;

[0038] 3. Steel cable guide mechanism;

[0039] 3a, first pulley bracket; 3b, pulley; 3c, second pulley bracket; 3d, steel cable;

[0040] 4. Snowmobile steering assembly;

[0041] 4a, steering control mechanism; 4b, steering return mechanism; 4c, steering rocker arm with pull rod mechanism; 4d, actuator; 4e, front axle; 4f, ice skates;

[0042] 5. Snowmobile steering assembly fixing device;

[0043] 5a, snowmobile control mechanism fixing device; 5b, snowmobile front frame fixing device; 5c, loading device; 5d, manual loading device; 5e, ice surface fixing device;

[0044] 5a1, lower bracket of the operating handle rebound belt; 5a2, upper bracket of the operating handle rebound belt;

[0045] 5b1, front fixed bracket; 5b2, rear fixed bracket; 5b3, rod;

[0046] 5c1, loading fixing rod; 5c2, loading plate; 5c3, loading fixing bracket. DETAILED DESCRIPTION

[0047] In order to make the technical solution of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the specification of the present invention. It should be noted that the following embodiments are only used to better understand the technical solution of the present invention and should not be understood as a limitation to the present invention.

[0048] Example 1.

[0049] The present embodiment provides a durability test system for a snowmobile steering assembly, comprising a temperature and humidity environment chamber, two sets of hydraulic actuators, a test bench and a control module; the temperature and humidity environment chamber is used to provide the snowmobile steering assembly 4 with the temperature and humidity environment required for the test; the hydraulic actuator is used to provide steering control force for the snowmobile steering assembly 4; the test bench is used to fix the snowmobile steering assembly 4 and simulate the force transmission method of the athlete's hand force loading; the control module is used to control the temperature and humidity environment chamber to change the temperature and humidity, and is also used to control the actuation form of the hydraulic actuator, thereby driving the snowmobile steering assembly 4 to realize the steering action and complete the durability test.

[0050] like Figure 6 As shown, the snowmobile steering assembly 4 described in this embodiment is composed of a steering control mechanism 4a, a steering return mechanism 4b, a steering rocker arm with a pull rod mechanism 4c, an actuator 4d, a front axle 4e and an ice skate 4f. The athlete turns by pulling the steering control mechanism 4a, and the steering control mechanism 4a automatically returns through the steering return mechanism 4b, and the steering control mechanisms 4a on both sides only perform a pulling operation, that is, the eastward steering rocker arm with a pull rod mechanism 4c moves, thereby driving the actuator 4d, the front axle 4e and the ice skate 4f to rotate, and the ice skate 4f contacts the ice surface.

[0051] The test system described in this embodiment controls the temperature and humidity environment box through the control module and can monitor the temperature and humidity in real time, which can truly simulate the contact between the ice skates and the ice surface and more realistically restore the actual usage conditions.

[0052] Example 2.

[0053] This embodiment is a further illustration of embodiment 1. The test bench is as follows: Figure 1 As shown, the test bench includes an actuator fixed rear bracket 1, two sets of linear guide rails 2, a steel cable guide mechanism 3, two steel cables 3d and a snowmobile steering assembly fixing device 5. The two sets of hydraulic actuators are parallel and horizontal. One end of the hydraulic actuator is connected to the actuator fixed rear bracket 1, and the other end is connected to the linear guide rail 2. The steel cable guide mechanism 3 is composed of a number of pulleys and pulley brackets, which are used to adjust the spacing between the two steel cables 3d. One end of the two steel cables 3d is respectively connected to the two sets of linear guide rails, and the other end is respectively connected to the two ends of the steering handle of the steering control mechanism of the snowmobile steering assembly 4; the snowmobile steering assembly fixing device 5 is arranged in a temperature and humidity environment box, and is used to fix the snowmobile steering assembly 4 to be tested. The schematic diagram of the actuator fixed rear bracket 1 is shown in FIG. Figure 2 .

[0054] Example 3.

[0055] This embodiment is a further example of embodiment 2. The schematic diagram of the linear guide device is shown in Figure 3 The two sets of linear guide rail devices 2 are symmetrically arranged. The linear guide rail device 2 includes a guide rail 2a, a guide rail bearing 2b, a back plate bracket 2c and a vertical bracket 2d. The guide rail bearing 2b is fixed on the back plate bracket 2c, and the back plate bracket 2c is fixed on the vertical bracket 2d.

[0056] Example 4.

[0057] This embodiment is a further illustration of the embodiment 2. The steel cable guide mechanism 3 and the steel cable 3d are shown in FIG. Figure 4 As shown, the steel cable guide mechanism 3 includes a first pulley bracket 3a, a pulley 3b, a second pulley bracket 3c and a steel cable 3d. A pulley 3b is fixed to each of the first pulley bracket 3a and the second pulley bracket 3c. The excessive width of the steel cable 3d between the two hydraulic actuators is reduced to a size that can pass through the small opening reserved in the temperature and humidity environment box. The spatial relationship between the temperature and humidity environment box and the steel cable is shown in FIG. Figure 5 shown.

[0058] The test system provided in this embodiment uses soft steel cable material as a force transmission device to simulate the hand force loading of athletes during actual steering, realizes steering simulation tests under low temperatures, and restores the use of the bobsleigh steering device to the maximum extent possible in view of its complex force conditions.

[0059] Example 5.

[0060] This embodiment is a further illustration of the embodiment 2. The snowmobile steering assembly fixing device 5 is shown in FIG. Figure 7 The snowmobile steering assembly fixing device 5 includes a snowmobile control mechanism fixing device 5a, a snowmobile front frame fixing device 5b, a loading device 5c, a hand force loading device 5d and an ice surface fixing device 5e. The snowmobile control mechanism fixing device 5a is used to fix the rebound belt of the snowmobile steering assembly 4, and the loading device 5c is loaded according to different working conditions. The schematic diagram of the hand force loading device 5d is shown in Fig.11 , connected to the hydraulic actuator via a steel cable 3d, the schematic diagram of the ice surface fixing device 5e is shown in Fig.12 It consists of two identical troughs filled with water, and a press-fit device is designed at the bottom edge of the trough to simulate the contact between the skates and the ice surface.

[0061] Example 6.

[0062] This embodiment is a further example of the embodiment 5. The schematic diagram of the snowmobile control mechanism fixing device 5a is shown in FIG. Figure 8 The snowmobile control mechanism fixing device 5a includes a control handle rebound band lower bracket 5a1 and a control handle rebound band upper bracket 5a2. The control handle rebound band lower bracket 5a1 and the control handle rebound band upper bracket 5a2 are both composed of a base plate and a support. The support is milled with grooves and holes for fixing the rebound band.

[0063] Example 7.

[0064] This embodiment is a further example of the embodiment 5, wherein the schematic diagram of the front frame fixing device 5b of the snowmobile is shown in FIG. Fig. 9 The front frame fixing device 5b of the snowmobile includes a front fixing bracket 5b1 and a rear fixing bracket 5b2. The bracket is composed of a base plate, a pillar, a small support plate and a rib. A rod 5b3 is designed on the bracket to limit the horizontal degree of freedom and retain the vertical degree of freedom to adapt to different loading and ensure that the load is fully loaded on the ice skates.

[0065] Example 8.

[0066] This embodiment is a further illustration of the embodiment 5, wherein the loading device 5c is shown in FIG. Fig.10 As shown, the loading device 5c is composed of a loading fixing rod 5c1, a loading plate 5c2 and a loading fixing bracket 5c3. The loading plate 5c2 is fixed to the loading fixing bracket 5c3 by the loading fixing rod 5c1. The loading plate 5c2 is designed to be split and can be loaded according to different working conditions. The lower end of the loading fixing bracket 5c3 is composed of a C-shaped bracket and bolts for clamping the front frame crossbeam.

[0067] Example 9.

[0068] This embodiment provides a durability test method for a snowmobile steering assembly. Fig.13 This is a flow chart of the test method described in this embodiment, using the test system described in any one of Embodiments 1-8, and the test method includes the following steps:

[0069] S1, placing the snowmobile steering assembly 4 to be tested in a temperature and humidity environment box, connecting it to the test system, adjusting the temperature and humidity environment box parameters to the target test temperature and humidity, and continuously monitoring;

[0070] S2. Under three different working conditions, respectively, control the hydraulic actuator to pull the steering assembly 4 of the snowmobile to be tested to achieve steering action. When the number of steering times is not less than a specific number of times under the working condition, switch the test working condition.

[0071] The method described in this embodiment uses the above system to continuously monitor the test temperature and humidity, ensuring that the actual snow vehicle driving environment is highly restored during the test and the test results are reliable.

[0072] As a preferred solution, the pulling speeds of the snowmobile steering assembly to be tested under the three different working conditions are: 5mm / s-10mm / s, 50mm / s-100mm / s and above 1000mm / s, and the specific steering times under the three different working conditions are 100 times, 500 times and 24000 times, respectively.

[0073] Since the speed of turning during the actual driving of the snowmobile is extremely high and involves complex curves, in order to better verify the working performance of the steering assembly during actual driving, this embodiment gradually increases the steering pulling speed of the steering assembly to be tested and the number of turns to ensure that there will be no problems with the qualified snowmobile steering assembly components.

[0074] Example 10.

[0075] This embodiment provides a durability evaluation method for a snowmobile steering assembly, and the test method described in Example 9 is applied. After the test, the various components of the snowmobile steering assembly are checked. If there is no deformation or wear, the durability of the snowmobile steering assembly is qualified, otherwise it is unqualified.

[0076] The durability evaluation method provided in this embodiment can be used as an important reference for verification work during the snowmobile development process, thereby ensuring the durability of the snowmobile steering assembly and improving the overall quality of the snowmobile.

Claims

1. A durability test system for a snowmobile steering assembly, characterized in that: It comprises a temperature and humidity environment box, two sets of hydraulic actuators, a test bench and a control module; the temperature and humidity environment box is used to provide the temperature and humidity environment required for the test of the snow vehicle steering assembly (4); the hydraulic actuator is used to provide steering control force for the snow vehicle steering assembly (4); The test bench is used to fix the snowmobile steering assembly (4) and simulate the force transmission mode of the athlete's hand force loading; the control module is used to control the temperature and humidity environment box to change the temperature and humidity, and is also used to control the actuation mode of the hydraulic actuator, thereby driving the snowmobile steering assembly (4) to achieve steering action and complete the durability test; The test bench comprises an actuator fixing rear bracket (1), two sets of linear guide rail devices (2), a steel cable guide mechanism (3), two steel cables (3d) and a snowmobile steering assembly fixing device (5). The two sets of hydraulic actuators are parallel and in a horizontal state. One end of the hydraulic actuator is connected to the actuator fixing rear bracket (1), and the other end is connected to the linear guide rail device (2). The steel cable guide mechanism (3) is composed of a plurality of pulleys and pulley brackets, and is used to adjust the spacing between the two steel cables (3d). One end of the two steel cables (3d) is respectively connected to the two sets of linear guide rails, and the other end is respectively connected to the two ends of the steering handle of the steering control mechanism of the snowmobile steering assembly (4). The snowmobile steering assembly fixing device (5) is arranged in a temperature and humidity environment box, and is used to fix the snowmobile steering assembly (4) to be tested.

2. The durability testing system for a snowmobile steering assembly according to claim 1, characterized in that: The two groups of linear guide rail devices (2) are symmetrically arranged, and the linear guide rail device (2) comprises a guide rail (2a), a guide rail bearing (2b), a back plate bracket (2c) and a vertical bracket (2d), the guide rail bearing (2b) is fixed on the back plate bracket (2c), and the back plate bracket (2c) is fixed on the vertical bracket (2d).

3. The durability testing system for a snowmobile steering assembly according to claim 1, characterized in that: The steel cable guide mechanism (3) comprises a first pulley bracket (3a), a pulley (3b), a second pulley bracket (3c) and a steel cable (3d), wherein a pulley (3b) is fixed to each of the first pulley bracket (3a) and the second pulley bracket (3c), and the excessively wide distance of the steel cable (3d) between the two hydraulic actuators is reduced to a size that can pass through a small opening reserved in the temperature and humidity environment box.

4. The durability testing system for a snowmobile steering assembly according to claim 1, characterized in that: The snowmobile steering assembly fixing device (5) includes a snowmobile control mechanism fixing device (5a), a snowmobile front frame fixing device (5b), a loading device (5c), a manual force loading device (5d) and an ice surface fixing device (5e). The snowmobile control mechanism fixing device (5a) is used to fix the rebound belt of the snowmobile steering assembly (4). The loading device (5c) is loaded according to different working conditions. The manual force loading device (5d) is connected to the hydraulic actuator via a steel cable (3d). The ice surface fixing device (5e) consists of two identical grooves filled with water. A pressing device is designed at the bottom edge of the groove to simulate the contact between the ice skates and the ice surface.

5. The durability testing system for a snowmobile steering assembly according to claim 4, characterized in that: The snowmobile control mechanism fixing device (5a) comprises a control handle rebound band lower bracket (5a1) and a control handle rebound band upper bracket (5a2), wherein the control handle rebound band lower bracket (5a1) and the control handle rebound band upper bracket (5a2) are both composed of a base plate and a support, and the support is milled with a groove and has a hole for fixing the rebound band.

6. The durability testing system for a snowmobile steering assembly according to claim 4, characterized in that: The front frame fixing device (5b) of the snowmobile comprises a front fixing bracket (5b1) and a rear fixing bracket (5b2), wherein the bracket is composed of a base plate, a support column, a small support plate and a rib, and a rod (5b3) is designed on the bracket to limit the horizontal degree of freedom and retain the vertical degree of freedom to ensure that the load is fully loaded on the ice skates.

7. The durability testing system for a snowmobile steering assembly according to claim 4, characterized in that: The loading device (5c) is composed of a loading fixing rod (5c1), a loading plate (5c2) and a loading fixing bracket (5c3); the loading plate (5c2) is fixed to the loading fixing bracket (5c3) by the loading fixing rod (5c1); the loading plate (5c2) is designed to be split and can be loaded according to different working conditions; the lower end of the loading fixing bracket (5c3) is composed of a C-shaped bracket and bolts for clamping the front frame crossbeam.

8. A durability test method for a snowmobile steering assembly, characterized in that: Using the test system described in any one of claims 1 to 7, the test method comprises the following steps: S1. Place the steering assembly of the snowmobile to be tested in a temperature and humidity environment box, connect it to the test system, adjust the temperature and humidity environment box parameters to the target test temperature and humidity, and continuously monitor; S2. Under three different working conditions, respectively, control the hydraulic actuator to pull the steering assembly of the snowmobile to be tested to achieve steering action. When the number of steering times is not less than a specific number of times under the working condition, switch the test working condition.

9. A method for evaluating the durability of a snowmobile steering assembly, characterized in that: By applying the test method described in claim 8, each component of the snow vehicle steering assembly (4) is checked after the test. If there is no deformation or wear, the durability of the snow vehicle steering assembly (4) is qualified, otherwise it is unqualified.

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