CN211825062U

CN211825062U - Office chair backrest fatigue strength testing device

Info

Publication number: CN211825062U
Application number: CN202020495466.4U
Authority: CN
Inventors: 宋秀敏
Original assignee: Xuzhou Lingxiu Furniture Co ltd
Current assignee: Xuzhou Lingxiu Furniture Co ltd
Priority date: 2020-04-08
Filing date: 2020-04-08
Publication date: 2020-10-30
Anticipated expiration: 2030-04-08

Abstract

The utility model discloses an office chair backrest fatigue strength testing device, which comprises a base station, wherein the upper surface of the base station is welded with a stand column, the upper end of the stand column is fixedly connected with a fixed beam through a bolt, the lower side of the fixed beam is fixedly connected with a first hydraulic cylinder, the lower end of the first hydraulic cylinder is fixedly connected with a fixed plate, the lower side of the fixed plate is fixedly connected with a first pressure sensor, the lower side of the first pressure sensor is fixedly connected with a first pressure plate, the lower side of the fixed beam is fixedly connected with a fixed block through a bolt, the lower side of the fixed block is fixedly connected with a second hydraulic cylinder through a bolt, the utility model is provided with a second pressure plate which can compress the chair surface of an office chair, one side of the second pressure plate is movably pinned with a rotating plate which can apply pressure to the office chair backrest, the first pressure plate is arranged to, the measuring structure is more accurate and reasonable.

Description

Office chair backrest fatigue strength testing device

Technical Field

The utility model relates to an office chair detects technical field, specifically is an office chair back fatigue strength test device.

Background

The office chair refers to various chairs which are equipped for working conveniently in daily work and social activities. Office chairs are classified into a narrow sense and a broad sense, the narrow sense office chair refers to a backrest chair on which a person sits when working on a desktop in a sitting posture, and the broad sense office chair refers to all chairs used in offices, including office chairs, middle class chairs, guest-meeting chairs, employee chairs, conference chairs, visitor chairs, training chairs and the like. When the office chair is manufactured, the strength of the chair back needs to be tested, and only the chair surface and the chair back need to be arranged during testing for more convenience.

The office chair is used by people, and when fatigue strength test is carried out on the backrest of the office chair, a commonly used test device cannot imitate the force application mode of a human body to the office chair, so that the detection is not accurate.

Disclosure of Invention

An object of the utility model is to provide an office chair back fatigue strength test device sets up the second clamp plate, can compress tightly the seat of office chair, and second clamp plate one side activity pin joint has the rotor plate, and the rotor plate can exert pressure to office chair back, sets up first clamp plate, can cooperate the rotor plate to exert pressure to the back of the chair, and the human application of force mode to office chair back of the simulation, measurement structure is more accurate reasonable to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a fatigue strength testing device for office chair backrest comprises a base station, wherein the upper surface of the base station is welded with a stand column, the upper end of the upright post is fixedly connected with a fixed beam through a bolt, the lower side of the fixed beam is fixedly connected with a first hydraulic cylinder, the lower end of the first hydraulic cylinder is fixedly connected with a fixed plate, the lower side of the fixed plate is fixedly connected with a first pressure sensor, a first pressure plate is fixedly connected with the lower side of the first pressure sensor, a fixed block is fixedly connected with the lower side of the fixed beam through a bolt, the lower side of the fixed block is fixedly connected with a second hydraulic cylinder through a bolt, the lower end of the second hydraulic cylinder is fixedly connected with a second pressing plate, one side of the second pressure plate is rotationally pinned with a rotating plate, one side of the rotating plate is welded with a cylindrical rod, the upper surface of the base station is provided with a second pressure sensor, and the upper side of the second pressure sensor is fixedly connected with a carrying plate.

Preferably, the upper surface of the base station is fixedly connected with an L-shaped fixed plate, a moving plate is connected between the L-shaped fixed plates in a sliding mode, the upper side of the L-shaped fixed plate is rotatably connected with a threaded knob through a bolt, and the lower end of the threaded knob is tightly pressed and fixed on the moving plate.

Preferably, one side of the upright post is fixedly connected with a first reinforcing rod, and the upper end of the first reinforcing rod is fixedly connected to the lower side of the fixed beam.

Preferably, the fixed plate upside fixedly connected with first guide bar, first guide bar upper end slides and pegs graft in the fixed beam, second clamp plate upside fixedly connected with second guide bar, second guide bar upper end slides and pegs graft in the fixed block.

Preferably, the lower side of the second pressing plate is fixedly connected with an elastic rubber layer, and the surface of the elastic rubber layer is fixedly connected with an elastic rubber bump.

Preferably, the base station downside fixedly connected with landing leg, landing leg one side fixedly connected with second stiffener, second stiffener upper end welds in the base station lower surface.

Compared with the prior art, the beneficial effects of the utility model are that:

1. set up the second clamp plate, can compress tightly the seat of office chair, second clamp plate one side activity round pin has connect the rotor plate, and the rotor plate can exert pressure to the office chair back, sets up first clamp plate, can cooperate the rotor plate to exert pressure to the back of the chair, and the application of force mode of the human pair of office chair back of the simulation is measured the structure more accurate reasonable.

Drawings

FIG. 1 is a schematic view of the structure of the present invention;

FIG. 2 is a schematic view of a portion A of FIG. 1 according to the present invention;

fig. 3 is a schematic side view of the L-shaped fixing plate of the present invention.

In the figure: 1. a base station; 2. a column; 3. a fixed beam; 4. a first hydraulic cylinder; 5. a fixing plate; 6. a first pressure sensor; 7. a first platen; 9. a fixed block; 10. a second hydraulic cylinder; 11. a second platen; 12. a rotating plate; 13. a cylindrical rod; 14. a second pressure sensor; 15. a loading plate; 16. an L-shaped fixing plate; 17. moving the plate; 18. a threaded knob; 19. a first reinforcement bar; 20. a first guide bar; 21. a second guide bar; 22. an elastic rubber layer; 23. an elastic rubber bump; 24. a support leg; 25. a second stiffener.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: the utility model provides an office chair back fatigue strength testing device, includes base station 1, in order to facilitate supporting base station 1, at 1 downside fixedly connected with landing leg 24 of base station, landing leg 24 one side fixedly connected with second stiffener 25, second stiffener 25 upper end welds in 1 lower surface of base station. 1 upper surface welding of base station has stand 2, and 2 upper ends of stand pass through bolt fixedly connected with fixed beam 3, in order to strengthen the intensity of fixed beam 3, at the first stiffener 19 of stand 2 one side fixedly connected with, first stiffener 19 upper end fixed connection is in fixed beam 3 downside.

3 first pneumatic cylinders 4 of downside fixedly connected with of fixed beam, 4 lower extreme fixedly connected with fixed plates 5 of first pneumatic cylinder, the first pressure sensor 6 of 5 downside fixedly connected with of fixed plate, the first clamp plate 7 of 6 downside fixedly connected with of first pressure sensor, 3 downside of fixed beam passes through bolt fixedly connected with

fixed block

9, 9 downside of fixed block passes through bolt fixedly connected with second

pneumatic cylinder

10, 10 lower extreme fixedly connected with second clamp plates 11 of second pneumatic cylinder, in order to place the broken seat, at 11 downside fixedly connected with elastic rubber layer 22 of second clamp plate, elastic rubber layer 22 fixed surface is connected with elastic rubber lug 23. A rotating plate 12 is rotatably pinned on one side of the second pressing plate 11, a cylindrical rod 13 is welded on one side of the rotating plate 12, a second pressure sensor 14 is arranged on the upper surface of the base platform 1, and a carrying plate 15 is fixedly connected to the upper side of the second pressure sensor 14. The first pressure sensor 6 and the second pressure sensor 14 are both PT124-35 Mpa. First pressure sensor 6 and second pressure sensor 14 collect data, and first pressure sensor 6 and the equal electric connection of second pressure sensor 14 in the display carry out the reading through display device, can obtain the testing data.

In order to prevent the chair seat from being inclined, an L-shaped fixing plate 16 is fixedly connected to the upper surface of the base 1, a moving plate 17 is slidably connected between the L-shaped fixing plates 16, a threaded knob 18 is rotatably connected to the upper side of the L-shaped fixing plate 16 through a bolt, and the lower end of the threaded knob 18 is tightly pressed and fixed on the moving plate 17. One side edge of the chair seat is attached to the movable plate 17, so that the chair seat can be square, and when the chair seat is large or small, the position of the movable plate 17 can be adjusted, so that the chair seat is always under the second pressure plate 11.

In order to guide the first pressing plate 7, a first guide rod 20 is fixedly connected to the upper side of the fixing plate 5, the upper end of the first guide rod 20 is inserted into the fixing beam 3 in a sliding mode, in order to guide the second pressing plate 11, a second guide rod 21 is fixedly connected to the upper side of the second pressing plate 11, and the upper end of the second guide rod 21 is inserted into the fixing block 9 in a sliding mode.

The working principle is as follows: during the test, place the seat on carrying thing board 15, second pneumatic cylinder 10 drives second clamp plate 11 and pushes down, can compress tightly the seat of office chair, then first pneumatic cylinder 4 descends, drive first clamp plate 7 and move down, first clamp plate 7 pushes down rotor plate 12, rotor plate 12 can exert pressure to the office chair back, the human application of force mode to the office chair back of simulation, measure the structure more accurate reasonable, then first pressure sensor 6 and second pressure sensor 14 collect data, carry out the reading through display device, can obtain the measured data.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An office chair backrest fatigue strength testing device comprises a base station (1), and is characterized in that: the upper surface of the base station (1) is welded with a stand column (2), the upper end of the stand column (2) is fixedly connected with a fixed beam (3) through a bolt, a first hydraulic cylinder (4) is fixedly connected to the lower side of the fixed beam (3), a fixed plate (5) is fixedly connected to the lower end of the first hydraulic cylinder (4), a first pressure sensor (6) is fixedly connected to the lower side of the fixed plate (5), a first pressing plate (7) is fixedly connected to the lower side of the first pressure sensor (6), a fixed block (9) is fixedly connected to the lower side of the fixed beam (3) through a bolt, a second hydraulic cylinder (10) is fixedly connected to the lower side of the fixed block (9) through a bolt, a second pressing plate (11) is fixedly connected to the lower end of the second hydraulic cylinder (10), a rotating pin is connected to one side of the second pressing plate (11), the upper surface of the base platform (1) is provided with a second pressure sensor (14), and the upper side of the second pressure sensor (14) is fixedly connected with a carrying plate (15).

2. The office chair back fatigue strength testing device as claimed in claim 1, wherein: the improved structure is characterized in that an L-shaped fixing plate (16) is fixedly connected to the upper surface of the base platform (1), a moving plate (17) is slidably connected between the L-shaped fixing plates (16), a threaded knob (18) is rotatably connected to the upper side of the L-shaped fixing plate (16) through a bolt, and the lower end of the threaded knob (18) is tightly pressed and fixed on the moving plate (17).

3. The office chair back fatigue strength testing device as claimed in claim 1, wherein: stand (2) one side fixedly connected with first stiffener (19), first stiffener (19) upper end fixed connection is in fixed beam (3) downside.

4. The office chair back fatigue strength testing device as claimed in claim 1, wherein: the fixed plate (5) upside fixedly connected with first guide bar (20), first guide bar (20) upper end slides and pegs graft in fixed beam (3), second clamp plate (11) upside fixedly connected with second guide bar (21), second guide bar (21) upper end slides and pegs graft in fixed block (9).

5. The office chair back fatigue strength testing device as claimed in claim 1, wherein: an elastic rubber layer (22) is fixedly connected to the lower side of the second pressing plate (11), and an elastic rubber bump (23) is fixedly connected to the surface of the elastic rubber layer (22).

6. The office chair back fatigue strength testing device as claimed in claim 1, wherein: base station (1) downside fixedly connected with landing leg (24), landing leg (24) one side fixedly connected with second stiffener (25), second stiffener (25) upper end welds in base station (1) lower surface.