Luggage rack strength testing device

Abstract

The utility model discloses a luggage rack strength testing device. The luggage rack strength testing device comprises a clamping assembly used for clamping a luggage rack, at least two supporting assemblies used for supporting and fixing the luggage rack and a counterweight assembly, the clamping assembly comprises a load shaft and a clamping part, the load shaft is connected with the middle of the clamping part, two clamping ends of the clamping part are respectively provided with a clamping hole, and the clamping holes are symmetrically arranged relative to the load shaft; each clamping hole corresponds to each supporting assembly, so that the luggage rack fixed on the supporting assemblies can penetrate through the clamping holes; the supporting assemblies are arranged below the clamping assembly and are symmetrically arranged relative to the load shaft, and the positions of the supporting assemblies are matched with the positions of the clamping holes; and the counterweight assembly is in force transmission connection with the load shaft. During testing, the load is uniformly conducted to the two luggage racks which are symmetrically arranged, the actual situation can be simulated, the strength of the two luggage racks can be comprehensively tested, each luggage rack does not need to be tested respectively, the testing process is simplified, and the efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of automobile supplies, in particular to a luggage rack strength testing device. Background Art

[0002] When a car luggage rack leaves the factory, it is particularly important to test its load-bearing capacity and durability. As an item frequently used by travelers, the strength and durability of the luggage rack are directly related to the user's safety and experience.

[0003] The existing roof rack strength testing process usually faces some challenges and inconveniences, especially when the load-bearing capacity of the roof rack needs to be tested. Traditional testing methods often require testing each roof rack individually, which is not only time-consuming but also inefficient. In addition, due to the complexity of the testing process, the test results sometimes cannot accurately reflect the load-bearing capacity of the roof rack in actual use. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a luggage rack strength testing device to solve the problem of complicated luggage rack testing process.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A luggage rack strength testing device comprises a clamping assembly for clamping the luggage rack, at least two supporting assemblies and a counterweight assembly for supporting and fixing the luggage rack;

[0007] The clamping assembly comprises a load shaft and a clamping portion, wherein the load shaft is connected to the middle portion of the clamping portion, and two clamping ends of the clamping portion are respectively provided with clamping holes, and the clamping holes are symmetrically arranged about the load shaft;

[0008] Each of the clamping holes corresponds to each of the supporting components, so that the luggage rack fixed on the supporting components can pass through the clamping hole;

[0009] The support assembly is disposed below the clamping assembly and is symmetrically arranged about the load axis, and the position of the support assembly matches the position of the clamping hole;

[0010] The counterweight assembly is force-transmittingly connected to the load shaft.

[0011] Furthermore, it also includes a workbench, and the supporting assembly is connected to the workbench.

[0012] Further, the counterweight assembly includes two fixed pulleys and two counterweight parts;

[0013] One of the fixed pulleys is arranged in the direction of the axis of the load shaft, and the axis of the fixed pulley is perpendicular to the axis of the load shaft, and is assembled and connected with the workbench;

[0014] Another fixed pulley is arranged in a direction perpendicular to the axis of the load shaft, and the axis of the fixed pulley is parallel to the axis of the load shaft, and is assembled and connected with the workbench;

[0015] The two counterweights are connected to the load shaft through the two fixed pulleys.

[0016] Furthermore, the counterweight part is force-transmittingly connected to the load shaft via a chain.

[0017] Further, the number of the clamping assemblies is at least three;

[0018] The head, middle and tail of the load shaft are respectively provided with the clamping components.

[0019] Furthermore, projections of the support assembly and the clamping holes in the vertical direction are staggered in the length direction of the support assembly.

[0020] Furthermore, the number of the support assemblies on each side of the load axis is an even number.

[0021] Furthermore, it also includes a deformation detection component; the deformation detection component is symmetrically arranged about the load axis.

[0022] Furthermore, the deformation detection assembly includes a dial indicator, and a detection head of the dial indicator is adjacent to the clamping hole.

[0023] Furthermore, the deformation detection assembly further comprises a flipping portion, the dial indicator is snap-connected to the flipping portion, and the flipping portion is used to adjust the orientation of the test head of the dial indicator.

[0024] The beneficial effects of the utility model are: providing a luggage rack strength testing device, which supports and fixes the luggage rack through a supporting assembly, and uses a load shaft on the clamping assembly to apply a load to the luggage rack for testing, wherein the load shaft is connected to the middle part of the clamping part, and the clamping holes of the clamping part are symmetrically arranged about the load axis. During the test, the load is evenly transmitted to the two symmetrically arranged luggage racks, which can simulate the actual situation and comprehensively test the strength of the two luggage racks. There is no need to test each luggage rack separately, which simplifies the testing process and improves efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural schematic diagram of a luggage rack strength testing device in an embodiment of the utility model;

[0026] Figure 2 for Figure 1 A partial enlarged view of

[0027] Description of labels:

[0028] 1. Clamping assembly; 11. Load shaft; 12. Clamping portion; 13. Clamping hole;

[0029] 2. Support components;

[0030] 3. Counterweight assembly; 31. Fixed pulley; 32. Counterweight part;

[0031] 4. Workbench;

[0032] 5. Deformation detection component; 51. Dial indicator; 52. Flipping unit. DETAILED DESCRIPTION

[0033] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0034] Based on the defect that it is not convenient to conduct comprehensive tests on two luggage racks in the current luggage rack testing process, a luggage rack strength testing device is proposed, including a clamping assembly 1 for clamping the luggage rack, at least two supporting assemblies 2 for supporting and fixing the luggage rack, and a counterweight assembly 3;

[0035] The clamping assembly 1 comprises a load shaft 11 and a clamping portion 12, wherein the load shaft 11 is connected to the middle portion of the clamping portion 12, and two clamping ends of the clamping portion 12 are respectively provided with clamping holes 13, and the clamping holes 13 are symmetrically arranged with respect to the load shaft 11;

[0036] Each of the clamping holes 13 corresponds to each of the supporting components 2, so that the luggage rack fixed on the supporting components 2 can pass through the clamping holes 13;

[0037] The support assembly 2 is disposed below the clamping assembly 1 and is symmetrically disposed about the load axis 11 , and the position of the support assembly 2 matches the position of the clamping hole 13 ;

[0038] The counterweight assembly 3 is force-transmittingly connected to the load shaft 11 .

[0039] It should be noted that the device supports and fixes the luggage rack through the support component 2, and uses the load shaft 11 on the clamping component 1 to apply a load to the luggage rack for testing, wherein the load shaft 11 is connected to the middle part of the clamping part 12, and the clamping holes 13 of the clamping part 12 are symmetrically arranged about the load shaft 11. During the test, the load is evenly transmitted to the two symmetrically arranged luggage racks, and the force transmission direction and force transmission value of the counterweight component 3 are continuously adjusted during the test. It can simulate the actual situation and comprehensively test the strength of the two luggage racks. There is no need to test each luggage rack separately, which simplifies the testing process and improves efficiency.

[0040] In some embodiments, a workbench 4 is further included, and the support assembly 2 is connected to the workbench 4. The luggage rack is fixed to the support assemblies 2 located on both sides of the load shaft 11, and the support assembly 2 is connected to the workbench 4, so as to simulate the application environment where the luggage rack is installed on the top of the car. The workbench 4 simultaneously bears the recoil force transmitted by the two luggage racks and feeds back to the luggage rack, so that the test effect is closer to reality.

[0041] In some embodiments, the counterweight assembly 3 includes two fixed pulleys 31 and two counterweight parts 32; one of the fixed pulleys 31 is arranged in the direction of the axis of the load shaft 11, and the axis of the fixed pulley 31 is perpendicular to the axis of the load shaft 11, and is assembled and connected to the workbench 4; the other fixed pulley 31 is arranged in the direction perpendicular to the axis of the load shaft 11, and the axis of the fixed pulley 31 is parallel to the axis of the load shaft 11, and is assembled and connected to the workbench 4; the two counterweight parts 32 are respectively connected to the load shaft 11 through the two fixed pulleys 31 for force transmission. Since the luggage rack is mainly subjected to the inertial force generated during the driving of the car and the pulling force generated on the luggage rack during bumping, the device simulates the effects of the two forces respectively. One is to set a fixed pulley 31 in the axial extension direction of the load shaft 11, and the fixed pulley 31 is assembled and connected with the workbench 4, so that the force transmission direction of the counterweight part 32 is parallel to the axis of the load shaft 11. The other is to set a fixed pulley 31 in a direction perpendicular to the axial direction of the load shaft 11, and the fixed pulley 31 is assembled and connected with the workbench 4, so that the force transmission direction of the counterweight part 32 is perpendicular to the axis of the load shaft 11, and then simulate the test in the two directions where the luggage rack actually bears the maximum load. Preferably, the counterweight part 32 is connected to the load shaft 11 through a chain for force transmission.

[0042] In some embodiments, the number of the clamping assemblies 1 is at least three; the head, middle and tail of the load shaft 11 are respectively provided with the clamping assemblies 1. Since the luggage rack is usually fixedly connected to the top of the car at the front and rear ends during actual use, stress concentration is prone to occur at the front and rear ends of the luggage rack. In addition, the inventor found through experiments that the luggage rack is often located in the middle section of the luggage rack during use. Therefore, the device is provided with clamping assemblies 1 at the head, middle and tail of the load shaft 11, respectively, to simulate the three risk sections in the actual use process for testing, so that the test effect of the luggage rack meets the actual use requirements. Preferably, the number of clamping assemblies is five, two are respectively provided at the head of the load shaft, two are provided at the tail, and one is provided at the middle of the load shaft, focusing on testing the front and rear positions of the luggage rack installed on the top of the car. Since the luggage rack has an irregular curvature, the load-bearing capacity of different curvature sections is also different. In order to control the dangerous section, two clamping assemblies are respectively provided at the front and rear ends for strength testing.

[0043] In some embodiments, the projections of the support assembly 2 and the clamping holes 13 in the vertical direction are staggered in the length direction of the support assembly 2. Since the clamping holes 13 are the main force transmission positions of the load shaft 11, if the clamping hole 13 in the luggage rack support position coincides with the fixed position of the support assembly 2 to the luggage rack, the test stress transmitted by the load shaft 11 will be directly absorbed by the support assembly 2, resulting in a significant reduction in the test effect. Therefore, in the present device, the projections of the support assembly 2 and the clamping holes 13 in the vertical direction are staggered in the length direction of the support assembly 2.

[0044] Preferably, the number of the support assemblies 2 on each side of the load axis 11 is an even number. In order to stably support the luggage rack and avoid a single support assembly 2 fixing the luggage rack, which would cause an interfering stress concentration point, the number of the support assemblies 2 on each side of the load axis 11 in the device is an even number, preferably, the number of the support assemblies 2 on each side is 4.

[0045] In some embodiments, a deformation detection component 5 is also included; the deformation detection component 5 is symmetrically arranged about the load axis 11. In order to test the influence of the load on the luggage rack in real time, a deformation detection component is arranged in the present device to detect the deformation state of the luggage rack; specifically, the deformation detection component includes a dial gauge 51, and the detection head of the dial gauge 51 is adjacent to the clamping hole 13; preferably, the deformation detection component 5 also includes a flipping part 52, the dial gauge 51 is engaged with the flipping part 52, and the flipping part 52 is used to adjust the orientation of the test head of the dial gauge 51. Since the test head of the dial gauge 51 will be offset from the original position after the luggage rack is deformed, the flipping part 52 is arranged to be engaged with the dial gauge 51. Specifically, the flipping part 52 is provided with a lead-out through hole of the test head of the dial gauge 51, which is used to adjust the orientation of the test head of the dial gauge 51.

[0046] The luggage rack strength testing device provided by the utility model is suitable for simulating actual use conditions to test the luggage rack, which will be specifically described below in conjunction with an embodiment.

[0047] Please refer to Figure 1 to Figure 2 , Embodiment 1 of the present utility model is:

[0048] A luggage rack strength testing device comprises a clamping assembly 1 for clamping the luggage rack, at least two support assemblies 2 for supporting and fixing the luggage rack, and a counterweight assembly 3; the clamping assembly 1 comprises a load shaft 11 and a clamping portion 12, the load shaft 11 is connected to the middle of the clamping portion 12, two clamping ends of the clamping portion 12 are respectively provided with clamping holes 13, and the clamping holes 13 are symmetrically arranged about the load shaft 11; each clamping hole 13 corresponds to each support assembly 2, so that the luggage rack fixed on the support assembly 2 can pass through the clamping hole 13; the support assembly 2 is arranged below the clamping assembly 1 and is symmetrically arranged about the load shaft 11, and the position of the support assembly 2 matches the position of the clamping hole 13; the counterweight assembly 3 is connected to the load shaft 11 for force transmission. Specifically, the support assembly 2 fixes and locks the luggage rack through the tooth holes on the luggage rack, and uses the load shaft 11 on the clamping assembly 1 to apply a load to the luggage rack for testing. During the test, the force transmission direction and force transmission value of the counterweight assembly 3 are continuously adjusted to determine the bending degree of the luggage rack and test the maximum load force of the luggage rack in each direction, simulating the actual situation and comprehensively testing the strength of the two luggage racks. Preferably, the number of support assemblies 2 on each side of the load shaft 11 in the device is 4.

[0049] Please refer to Figure 1 to Figure 2 , Embodiment 2 of the present utility model is:

[0050] The difference between this embodiment and the first embodiment is that it also includes a workbench 4, and the support assembly 2 is connected to the workbench 4. The luggage rack is fixed to the support assemblies 2 located on both sides of the load shaft 11, and the support assembly 2 is connected to the workbench 4, so as to simulate the application environment in which the luggage rack is installed on the top of the car. The workbench 4 simultaneously bears the recoil force transmitted by the two luggage racks, so that the test effect is closer to reality.

[0051] At the same time, the counterweight assembly 3 includes two fixed pulleys 31 and two counterweight parts 32; one fixed pulley 31 is arranged in the direction of the axis of the load shaft 11, and the axis of the fixed pulley 31 is perpendicular to the axis of the load shaft 11, and is assembled and connected to the workbench 4; the other fixed pulley 31 is arranged in the direction perpendicular to the axis of the load shaft 11, and the axis of the fixed pulley 31 is parallel to the axis of the load shaft 11, and is assembled and connected to the workbench 4; the two counterweight parts 32 are connected to the load shaft 11 through the two fixed pulleys 31 for force transmission. Since the luggage rack is mainly subjected to the inertial force generated during the driving of the car and the pulling force generated on the luggage rack during bumping, the device simulates the effects of the two forces respectively. One is to set a fixed pulley 31 in the axial extension direction of the load shaft 11, and the fixed pulley 31 is assembled and connected with the workbench 4, so that the force transmission direction of the counterweight part 32 is parallel to the axis of the load shaft 11. The other is to set a fixed pulley 31 in a direction perpendicular to the axial direction of the load shaft 11, and the fixed pulley 31 is assembled and connected with the workbench 4, so that the force transmission direction of the counterweight part 32 is perpendicular to the axis of the load shaft 11, and then simulate the test in the two directions where the luggage rack actually bears the maximum load. Preferably, the counterweight part 32 is connected to the load shaft 11 through a chain for force transmission.

[0052] Please refer to Figure 1 to Figure 2 , Embodiment 3 of the present utility model is:

[0053] The difference between this embodiment and the first embodiment is that: the number of clamping assemblies 1 is at least three; the head, middle and tail of the load shaft 11 are respectively provided with clamping assemblies 1. Since the luggage rack is usually fixedly connected to the top of the car at the head and tail ends during actual use, stress concentration is prone to occur at the head and tail ends of the luggage rack. In addition, the inventor has found through experiments that the position with the largest deformation during use of the luggage rack is often located in the middle section of the luggage rack. Therefore, the present device respectively provides clamping assemblies 1 at the head, middle and tail of the load shaft 11, simulates the three risk sections in actual use for testing, and makes the test effect of the luggage rack meet the actual use requirements.

[0054] The projections of the support assembly 2 and the clamping hole 13 in the vertical direction are staggered in the length direction of the support assembly 2. Since the clamping hole 13 is the main force transmission position of the load shaft 11, if the clamping hole 13 in the luggage rack support position coincides with the fixed position of the support assembly 2 on the luggage rack, the test stress transmitted by the load shaft 11 will be directly absorbed by the support assembly 2, resulting in a significant reduction in the test effect. Therefore, in this device, the projections of the support assembly 2 and the clamping hole 13 in the vertical direction are staggered in the length direction of the support assembly 2.

[0055] Reference Figure 1 to Figure 2 , the fourth embodiment of the utility model is:

[0056] The difference between this embodiment and the first embodiment is that: in some embodiments, a deformation detection component 5 is further included; the deformation detection component 5 is symmetrically arranged about the load axis 11. In order to test the influence of the load on the luggage rack in real time, a deformation detection component is arranged in this device to detect the deformation state of the luggage rack; specifically, the deformation detection component includes a dial gauge 51, and the detection head of the dial gauge 51 is adjacent to the clamping hole 13; preferably, the deformation detection component 5 also includes a flipping part 52, the dial gauge 51 is snap-fitted with the flipping part 52, and the flipping part 52 is used to adjust the orientation of the test head of the dial gauge 51. Since the test head of the dial gauge 51 will be offset from the original position after the luggage rack is deformed, the flipping part 52 is arranged to snap-fit ​​the dial gauge 51. Specifically, the flipping part 52 is provided with a lead-out through hole of the test head of the dial gauge 51, which is used to adjust the orientation of the test head of the dial gauge 51.

[0057] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A luggage rack strength testing device, characterized in that: It includes a clamping assembly for clamping the luggage rack, at least two supporting assemblies and a counterweight assembly for supporting and fixing the luggage rack; The clamping assembly comprises a load shaft and a clamping portion, wherein the load shaft is connected to the middle portion of the clamping portion, and two clamping ends of the clamping portion are respectively provided with clamping holes, and the clamping holes are symmetrically arranged about the load shaft; Each of the clamping holes corresponds to each of the supporting components, so that the luggage rack fixed on the supporting components can pass through the clamping hole; The support assembly is disposed below the clamping assembly and is symmetrically arranged about the load axis, and the position of the support assembly matches the position of the clamping hole; The counterweight assembly is force-transmittingly connected to the load shaft.

2. A luggage rack strength testing device according to claim 1, characterized in that: Also included is a workbench, and the support assembly is connected to the workbench.

3. A luggage rack strength testing device according to claim 2, characterized in that: The counterweight assembly includes two fixed pulleys and two counterweight parts; One of the fixed pulleys is arranged in the direction of the axis of the load shaft, and the axis of the fixed pulley is perpendicular to the axis of the load shaft, and is assembled and connected with the workbench; Another fixed pulley is arranged in a direction perpendicular to the axis of the load shaft, and the axis of the fixed pulley is parallel to the axis of the load shaft, and is assembled and connected with the workbench; The two counterweights are connected to the load shaft through the two fixed pulleys.

4. A luggage rack strength testing device according to claim 3, characterized in that: The counterweight part is force-transmittingly connected to the load shaft through a chain.

5. The luggage rack strength testing device according to claim 1, characterized in that: The number of the clamping assemblies is at least three; The head, middle and tail of the load shaft are respectively provided with the clamping components.

6. A luggage rack strength testing device according to claim 5, characterized in that: The projections of the support assembly and the clamping holes in the vertical direction are staggered in the length direction of the support assembly.

7. A luggage rack strength testing device according to claim 5, characterized in that: The number of the support assemblies on each side of the load axis is an even number.

8. The luggage rack strength testing device according to claim 1, characterized in that: It also includes a deformation detection component; the deformation detection component is symmetrically arranged about the load axis.

9. A luggage rack strength testing device according to claim 8, characterized in that: The deformation detection component comprises a dial indicator, and the detection head of the dial indicator is adjacent to the clamping hole.

10. A luggage rack strength testing device according to claim 9, characterized in that: The deformation detection assembly further includes a flipping portion, the dial indicator is snap-connected to the flipping portion, and the flipping portion is used to adjust the orientation of the test head of the dial indicator.

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