Loading head for testing mechanical property of chair leg rest component

Abstract

According to the loading head for testing the mechanical property of the chair type leg rest part, the loading head is detachably installed on a chair type leg rest part mechanical property testing device, and the loading head can be replaced according to the type of data needing to be tested so as to meet the requirements of a user for different mechanical property data of the chair type leg rest part. The loading head comprises a clamp and a loading assembly, the loading assembly is installed at the bottom of the clamp, the loading assembly is installed on the chair leg rest mechanical property testing device through the clamp, and acting force is applied to the loading head through the chair leg rest mechanical property testing device, so that the loading assembly abuts against the chair leg rest. Therefore, the mechanical property of the chair leg rest piece can be tested.

Description

Technical Field

[0001] The utility model belongs to the technical field of testing devices, and in particular relates to a loading head used for testing the mechanical properties of a chair leg rest component. Background Art

[0002] With the continuous innovation and iteration of chair products, the concept of a nap chair has emerged, building upon the design of the standard office chair. This involves a legrest designed beneath the seat cushion. Currently, most legrests in the industry feature a retractable (telescopic) structure, designed to effectively support the legs of consumers during a nap, allowing them to relax. To improve the rationality of chair dimensional and structural data during the design and development process, chair samples often require testing. A chair mechanical performance testing device is a device used to test the legrests. The device features a pneumatic cylinder positioned directly opposite the legrests, which compresses the legrests and measures the pressure applied, thereby testing the mechanical properties of the chair. Currently, the testing methods for chair legrests on the market are relatively simple, and the loading heads used for testing are often fixed to the testing device, making them difficult to assemble and disassemble. This introduces certain inconveniences when simulating different user habits, resulting in limited test data and limited usability, hindering the development of chair legrests. Utility Model Content

[0003] In view of the above shortcomings, the technical problem to be solved by the present invention is to provide a loading head for testing the mechanical properties of chair leg rests, which is used to improve the convenience of disassembly and assembly of the loading head and the testing device, thereby facilitating the testing device to perform different mechanical properties tests on chair leg rests.

[0004] In order to solve the above technical problems, the technical solution adopted by the present utility model is:

[0005] A loading head for testing the mechanical properties of chair leg rest components, the loading head being detachably mounted on a chair leg rest mechanical properties testing device, comprising a clamp and a loading assembly, the loading assembly being mounted on the bottom of the clamp, the clamp being provided with a positioning groove and a locking piece, the clamp being mounted on the chair leg rest mechanical properties testing device via the positioning groove, the locking piece being connected to the chair leg rest mechanical properties testing device to fix the clamp on the chair leg rest mechanical properties testing device.

[0006] As a preferred solution of the present invention, the positioning grooves are arranged along the radial direction of the clamp.

[0007] As a preferred solution of the present invention, the clamp is provided with a slot, and one end of the locking member extends into the slot.

[0008] As a preferred solution of the present invention, the positioning groove is arranged on the top of the slot.

[0009] As a preferred solution of the present invention, a connecting hole is provided at the bottom of the slot, and the loading assembly is connected to the clamp through the connecting hole.

[0010] As a preferred solution of the present invention, the loading assembly includes a connecting member and an abutting member, and the abutting member is swingably connected to the clamp via the connecting member.

[0011] As a preferred solution of the present invention, the connecting member includes a mounting seat connected to the clamp and a swing seat connected to the abutment member, and the swing seat can be swingably mounted on the mounting seat so that the abutment member can be swingably mounted on the clamp through the connecting member.

[0012] As a preferred solution of the present invention, a connecting groove is provided at the bottom of the clamp, and the mounting seat is installed at the bottom of the clamp through the connecting groove.

[0013] As a preferred solution of the present invention, the loading assembly further comprises a connecting plate, and abutment members are respectively provided at both ends of the connecting plate and mounted via connecting members.

[0014] As a preferred solution of the present invention, the bottom of the loading assembly is arc-shaped.

[0015] The beneficial effect of the utility model is that the loading assembly is installed on the testing device by means of a clamp, thereby improving the convenience of disassembling and assembling the loading head, thereby facilitating the testing device to perform different mechanical performance tests on the leg rest of a chair. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the loading head in Example 1.

[0017] Figure 2 It is a structural diagram of the loading head of the second embodiment.

[0018] Figure 3 yes Figure 2 Schematic diagram of the structure after rotating at a certain angle.

[0019] Figure 4 It is a structural diagram of the loading head of Example 3.

[0020] Figure 5 This is a schematic diagram of the installation of this loading head.

[0021] Figure markings: clamp 1, positioning groove 1-1, slot 1-2, connecting hole 1-3, connecting groove 1-4, loading assembly 2, connecting part 2-1, abutment part 2-2, mounting seat 2-3, swing seat 2-4, connecting plate 2-5, locking part 3, locking screw 3-1, wrench 3-2, mounting shaft 4, cylinder 5. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] Example 1

[0024] A loading head for testing the mechanical properties of chair leg rests. The loading head can be detachably mounted on a device for testing the mechanical properties of chair leg rests. The loading head can be replaced according to the type of data to be tested to meet the user's requirements for different mechanical property data of chair leg rests.

[0025] The loading head includes a fixture 1 and a loading component 2. The loading component 2 is installed at the bottom of the fixture 1. The loading component 2 is installed on the mechanical properties testing device for the leg rest of a chair through the fixture 1. The mechanical properties testing device for the leg rest of a chair applies a force to the loading head so that the loading component 2 abuts against the leg rest of the chair, thereby testing the mechanical properties of the leg rest of the chair.

[0026] The mechanical performance testing device for chair legrests is a device for testing seat legrests. A cylinder 5 is provided on the device, and a mounting shaft 4 is fixed to the output shaft of the cylinder 5. The cylinder is positioned directly opposite the seat legrest and presses the seat legrest via the cylinder. In this embodiment, a fixture 1 is fixed to the cylinder 5 of the testing device and is used to test the mechanical performance of the legrest. The user may use the legrest in various ways, including resting both legs on both sides of the legrest, resting one leg on one side of the legrest, or having both legs crossed in the middle of the legrest. Mechanical performance testing is required for each of these conditions.

[0027] The clamp 1 is provided with a positioning groove 1-1 and a locking piece 3. The clamp 1 is positioned and installed on the mechanical properties testing device for the leg rest of a chair through the positioning groove 1-1 to prevent the clamp 1 from rotating relative to the testing device during loading. The locking piece 3 is connected to the mechanical properties testing device for the leg rest of a chair. The clamp 1 is fixed to the mechanical properties testing device for the leg rest of a chair through the locking piece 3, which improves the installation convenience of the clamp 1 and facilitates the replacement of the loading head, thereby facilitating the testing device to perform different mechanical properties tests on the leg rest of a chair.

[0028] The positioning groove 1-1 is arranged at the top of the fixture 1, which facilitates the abutment between the positioning groove 1-1 and the end face of the testing device, thereby realizing the positioning installation of the positioning groove 1-1 and the testing device. The positioning groove 1-1 is arranged along the radial direction of the fixture 1, which facilitates the processing of the positioning groove 1-1.

[0029] A slot 1-2 is provided in the middle of the fixture 1, and a positioning slot 1-1 is arranged at the top of the slot 1-2. The installation shaft 4 of the test device is inserted into the slot 1-2, and the positioning slot 1-1 is used to prevent the fixture 1 from rotating relative to the installation shaft 4. One end of the locking member 3 extends into the slot 1-2. By adjusting the locking member 3, one side of the locking member 3 is abutted against the installation shaft 4, thereby locking the fixture 1 and the installation shaft 4.

[0030] A connecting hole 1-3 is provided at the bottom of the slot 1-2. The connecting hole 1-3 is used to install a bolt. The loading assembly 2 is connected to the clamp 1 through the connecting hole 1-3.

[0031] In this embodiment, the loading component 2 is a plate with a length of 30-40 cm, a width of 8-10 cm, and a circular arc surface at the bottom. The loading component 2 of this embodiment is used to perform destructive experiments on the leg rest to detect the critical mechanical parameters when the leg rest is destroyed.

[0032] The locking member 3 includes a locking screw 3-1 and a wrench 3-2. The locking screw 3-1 is installed on the clamp 1 through a thread. The locking screw 3-1 is set toward the slot 1-2, and the wrench 3-2 is fixed to the outer end of the locking screw 3-1. The locking screw 3-1 is driven to rotate by the wrench 3-2.

[0033] Example 2

[0034] This embodiment is a replacement for the loading assembly 2 in the first embodiment. The loading assembly 2 in this embodiment includes a connecting member 2-1 and an abutting member 2-2. The abutting member 2-2 is swingably connected to the clamp 1 through the connecting member 2-1.

[0035] Specifically, the connecting member 2-1 includes a mounting seat 2-3 and a swing seat 2-4. The mounting seat 2-3 is fixedly mounted on the bottom of the clamp 1, and the swing seat 2-4 is fixedly mounted on the abutment member 2-2. The swing seat 2-4 is swingably mounted on the mounting seat 2-3 through a rotating shaft.

[0036] To facilitate installation of the mounting base 2-3, a connecting groove 1-4 is provided at the bottom of the clamp 1. The top of the mounting base 2-3 is mounted in the connecting groove 1-4, and the mounting base 2-3 is mounted to the bottom of the clamp 1 via bolts in the connecting holes 1-3. Preferably, the connecting groove 1-4 is cross-shaped, and the top surface of the mounting base 2-3 is straight-line-shaped. By changing the connection relationship between the mounting base 2-3 and the connecting groove 1-4, the abutment 2-2 can be mounted on the clamp 1 parallel to or perpendicular to the positioning groove 1-1.

[0037] In this embodiment, the abutment member 2-2 is a plate member, the width of the abutment member 2-2 is 8-12 cm, the length is 15-19 cm, and the bottom surface of the abutment member 2-2 is arc-shaped; this embodiment is used to simulate the use state of legs crossed and resting in the middle of the leg rest, and simulate the mechanical properties of the leg rest in this state.

[0038] The rest of the structure is consistent with that of the first embodiment.

[0039] Example 3

[0040] This embodiment is a replacement for the loading assembly 2 in the second embodiment. The loading assembly 2 in this embodiment includes a connecting plate 2-5, two mounting seats 2-3 and two swinging seats 2-4. The two mounting seats 2-3 are respectively installed at both ends of the connecting plate 2-5, and the two swinging seats 2-4 are respectively connected to the connecting plate 2-5 through the two mounting seats 2-3. The clamp 1 is installed in the middle of the connecting plate 2-5 by bolts.

[0041] In this embodiment, the length of the connecting plate 2-5 is 31-36 cm and the width is 4-6 cm. This embodiment is used to simulate the state in which both legs are placed on both sides of the leg rest at the same time, and simulates the mechanical properties of the leg rest in this state.

[0042] The rest of the structure is consistent with that of the second embodiment.

[0043] The above description of the disclosed embodiments will enable those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

[0044] Although this article uses more terms corresponding to the figure marks in the figures, it does not exclude the possibility of using other terms; these terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A loading head for testing the mechanical properties of a chair leg rest, wherein the loading head is detachably mounted on a chair leg rest mechanical properties testing device, and wherein: The invention comprises a clamp (1) and a loading assembly (2), wherein the loading assembly (2) is mounted on the bottom of the clamp (1), a positioning groove (1-1) and a locking member (3) are provided on the clamp (1), the clamp (1) is mounted on a chair leg rest mechanical performance testing device via the positioning groove (1-1), and the locking member (3) is connected to the chair leg rest mechanical performance testing device to fix the clamp (1) on the chair leg rest mechanical performance testing device.

2. A loading head for testing the mechanical properties of chair leg rests according to claim 1, characterized in that: The positioning groove (1-1) is arranged along the radial direction of the clamp (1).

3. The loading head for testing the mechanical properties of chair leg rests according to claim 1, characterized in that: The clamp (1) is provided with a slot (1-2), and one end of the locking member (3) extends into the slot (1-2).

4. A loading head for testing the mechanical properties of chair leg rests according to claim 3, characterized in that: The positioning groove (1-1) is arranged on the top of the slot (1-2).

5. The loading head for testing the mechanical properties of chair leg rests according to claim 3, characterized in that: A connecting hole (1-3) is provided at the bottom of the slot (1-2), and the loading component (2) is connected to the clamp (1) via the connecting hole (1-3).

6. The loading head for testing the mechanical properties of chair leg rests according to claim 3, characterized in that: The locking member (3) comprises a locking screw (3-1) and a wrench (3-2); the locking screw (3-1) is mounted on the clamp (1) via a thread, and the locking screw (3-1) is arranged toward the slot (1-2); and the wrench (3-2) is fixed to the outer end of the locking screw (3-1).

7. The loading head for testing the mechanical properties of chair leg rests according to claim 1, characterized in that: The loading assembly (2) comprises a connecting member (2-1) and an abutting member (2-2), and the abutting member (2-2) is swingably connected to the clamp (1) via the connecting member (2-1).

8. The loading head for testing the mechanical properties of chair leg rests according to claim 7, characterized in that: The connecting member (2-1) comprises a mounting seat (2-3) connected to the clamp (1) and a swing seat (2-4) connected to the abutment member (2-2); the swing seat (2-4) is swingably mounted on the mounting seat (2-3).

9. The loading head for testing the mechanical properties of chair leg rests according to claim 8, characterized in that: The bottom of the clamp (1) is provided with a connecting groove (1-4), and the mounting seat (2-3) is mounted on the bottom of the clamp (1) through the connecting groove (1-4).

10. The loading head for testing the mechanical properties of chair leg rests according to claim 9, characterized in that: The connecting groove (1-4) is in a cross shape, the top surface of the mounting seat (2-3) is in a straight line shape, and the mounting seat (2-3) is fixed in the connecting groove (1-4).

11. The loading head for testing the mechanical properties of chair leg rests according to claim 7, characterized in that: The loading assembly (2) further comprises a connecting plate (2-5), and abutment members (2-2) are respectively provided at both ends of the connecting plate (2-5) and are mounted via a connecting member (2-1).

12. The loading head for testing the mechanical properties of chair leg rests according to claim 1, characterized in that: The bottom of the loading component (2) is an arc surface.

Images