Friction experiment clamp for traction sheave and steel wire rope of vertical universal friction-wear testing machine

Abstract

The utility model relates to the technical field of inspection and detection of special equipment, in particular to a friction experiment clamp for a traction sheave and a steel wire rope of a vertical universal friction-wear testing machine, which comprises a fixing clamp, a support plate, a fixing disc and a steel wire clamp, the fixing disc is connected with the supporting plate; the fixing clamp is used for connecting a testing machine; the fixing disc is used for being matched with the steel wire clamp to tension the two ends of the steel wire rope so that the steel wire rope can be wound around a wheel groove of the traction wheel. The clamp provided by the utility model can be matched with a vertical universal friction-wear testing machine to carry out a friction test of the steel wire rope and the traction wheel, the test load can be adjusted by increasing or decreasing the weights in the test process, and meanwhile, the contact area of the steel wire rope and the traction wheel can be adjusted by replacing different connection positions of the steel wire rope on the fixed disc.

Description

Technical Field

[0001] The utility model relates to the technical field of special equipment inspection and detection, in particular to a friction test fixture for a traction wheel and a steel wire rope of a vertical universal friction and wear testing machine. Background Art

[0002] As a core component of the elevator system, the traction sheave plays a key role in the field of vertical transportation. The working principle of the traction sheave is based on friction. It achieves the lifting and lowering movement of the car and counterweight through the friction between the wire rope and the traction sheave rope groove. Simulating the friction between the traction sheave and the wire rope allows the wear of the traction sheave and wire rope to be measured, which plays an important role in improving the service life of the elevator. The existing technology does not have a dedicated fixture for use with a vertical universal friction and wear tester to conduct friction tests on the traction sheave and wire rope. Therefore, a friction test fixture for the traction sheave and wire rope of a vertical universal friction and wear tester is urgently needed. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a friction test fixture for the traction sheave and the wire rope of a vertical universal friction and wear testing machine. The fixture can be used in conjunction with the vertical universal friction and wear testing machine to carry out friction tests between the wire rope and the traction sheave. During the test, the test load can be adjusted by adding or removing weights. At the same time, the contact area between the wire rope and the traction sheave can be adjusted by changing different connection positions of the wire rope on the fixed disk.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] A friction test fixture for a traction sheave and a steel wire rope of a vertical universal friction and wear testing machine, comprising a fixing clamp, a support plate, a fixing disc, and a steel wire clamp, wherein the support plate is vertically arranged, the support plate is connected to the fixing clamp, and the fixing disc is connected to the support plate;

[0006] The fixing clip is used to connect to the testing machine;

[0007] The fixing plate is used to cooperate with the wire clamp to tighten the two ends of the wire rope so that the wire rope is tightly wound around the wheel groove of the traction wheel.

[0008] Furthermore, the support plate and the fixing clip are detachably connected.

[0009] Furthermore, the fixing clamp includes a first vertical plate, a second vertical plate, and a horizontal plate connecting the first vertical plate and the second vertical plate, the first vertical plate, the second vertical plate, and the horizontal plate forming a U-shaped bracket structure, the first vertical plate being threadedly connected to a first screw, the end of the first screw extending between the first vertical plate and the second vertical plate, and a portion of the first screw located between the first vertical plate and the second vertical plate being provided with a pressing portion;

[0010] A fixed claw, a slide rail and a movable claw are provided on the back of the second vertical plate. The movable claw is slidably set on the slide rail. The movable claw is connected to a driving member. The driving member is used to drive the movable claw close to or away from the fixed claw, and can fix the movable claw at any position of the movement.

[0011] Furthermore, the driving member includes a second screw rod, the movable claw is provided with a first threaded hole, and the second screw rod is connected to the movable claw through the first threaded hole.

[0012] Furthermore, a handle is provided at one end of the second screw away from the movable claw.

[0013] Furthermore, the axis of the first screw and the axis of the second screw are perpendicular to each other.

[0014] Furthermore, the fixing disk is an arc-shaped structure with an opening, and a plurality of first through holes for the ends of the wire ropes to pass through are evenly provided on the fixing disk along the vertical direction.

[0015] Furthermore, the wire clamp includes a locking seat and a U-shaped locking rod. The locking seat is provided with two second through holes. Both ends of the locking rod pass through the second through holes and are locked by nuts.

[0016] Furthermore, it also includes weights, which are hung at both ends of the wire rope. The beneficial effects of this utility model are:

[0017] The fixture of the utility model can be used in conjunction with a vertical universal friction and wear testing machine to carry out friction tests on wire ropes and traction sheaves. During the test, the test load can be adjusted by adding or removing weights. At the same time, the contact area between the wire rope and the traction sheave can be adjusted by changing different connection positions of the wire rope on the fixed disk. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional diagram of a friction test fixture for a traction sheave and a steel wire rope of a vertical universal friction and wear testing machine according to an embodiment of the present invention;

[0019] Figure 2 is a three-dimensional diagram of the fixing clip;

[0020] Figure 3 It is a three-dimensional diagram of a wire clamp;

[0021] In the figure, 1. fixing clamp; 2. support plate; 3. fixing plate; 4. wire clamp; 5. wire rope; 6. traction wheel; 7. first vertical plate; 8. second vertical plate; 9. horizontal plate; 10. first screw; 11. pressing part; 12. second screw; 13. fixed claw; 14. movable claw; 15. slide rail; 16. locking seat; 17. handle; 18. first through hole; 19. weight; 20. locking rod. DETAILED DESCRIPTION

[0022] The following will be combined with the embodiments to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work shall fall within the scope of protection of the present invention.

[0023] See Figure 1-Figure 3 , the utility model provides a technical solution:

[0024] Example:

[0025] A friction test fixture for a traction sheave and a steel wire rope of a vertical universal friction and wear testing machine, comprising a fixing clamp 1, a support plate 2, a fixing disc 3, and a steel wire clamp 4. The support plate 2 is vertically arranged and detachably connected to the fixing clamp 1. The fixing disc 3 is connected to the support plate 2 (wherein a second threaded hole is provided at the lower end of the fixing disc 3, and a third threaded hole coaxial with the second threaded hole is provided at the upper end of the support plate 2. The fixing disc 3 is connected to the support plate 2 via the second threaded hole, a third screw, and the third threaded hole).

[0026] The fixing clip 1 is used to connect the testing machine (the vertical universal friction and wear testing machine (hereinafter referred to as the testing machine) in this embodiment is a prior art, and can be, but is not limited to, the vertical universal friction and wear testing machine produced by Sichuan Jiaoyangfan Technology Co., Ltd., and its specific structure and working principle are not described in detail here);

[0027] The fixed disk 3 is used to cooperate with the wire clamp 4 to tighten the two ends of the wire rope 5 so that the wire rope 5 is tightly wound around the wheel groove of the traction wheel 6. The fixed disk 3 is an arc-shaped structure with an opening, and a plurality of first through holes 18 for the ends of the wire rope 5 to pass through are evenly arranged on the fixed disk in the vertical direction.

[0028] like Figure 3 As shown, the wire clamp 4 includes a locking seat 16 and a U-shaped locking rod 20. The locking seat 16 is provided with two second through holes. Both ends of the locking rod 20 pass through the second through holes and are locked by nuts.

[0029] like Figure 2As shown, the fixing clamp 1 includes a first vertical plate 7, a second vertical plate 8 and a horizontal plate 9 connecting the first vertical plate 7 and the second vertical plate 8. The first vertical plate 7, the second vertical plate 8 and the horizontal plate 9 form a U-shaped bracket structure. The first vertical plate 7 is threadedly connected to a first screw 10. The end of the first screw 10 extends between the first vertical plate 7 and the second vertical plate 8. The portion of the first screw 10 located between the first vertical plate 7 and the second vertical plate 8 is provided with a suction cup-shaped pressing portion 11; (wherein, the support plate 2 is detachably fixed between the pressing portion 11 and the second vertical plate 8)

[0030] A fixed claw 13, a slide rail 15 and a movable claw 14 are provided on the back of the second vertical plate 8. The movable claw 14 is slidably set on the slide rail 15. The movable claw 14 is connected to a driving member, which is used to drive the movable claw 14 to move closer to or away from the fixed claw 13, and can fix the movable claw 14 at any position of the movement.

[0031] The driving member includes a second screw rod 12 . A first threaded hole is provided on the movable claw 14 . The second screw rod 12 is connected to the movable claw 14 through the first threaded hole.

[0032] A handle 17 is provided at one end of the second screw rod 12 away from the movable claw 14 .

[0033] The axis of the first screw 10 and the axis of the second screw 12 are perpendicular to each other.

[0034] The device further comprises weights 19, which are suspended at both ends of the steel wire rope 5. The steel wire rope 5 is connected to form a ring through a connecting sleeve after passing through the first through hole 18, and the weights 19 are hung on the ring.

[0035] During use, the fixing clamp 1 is first used to fix the tabletop of the testing machine. The fixing method is to rotate the second screw rod 12, so that the movable claw 14 can only move closer to or away from the fixed claw 13 along the axial direction of the second screw rod 12 under the combined action of the second screw rod 12, the first threaded hole and the slide rail 15. Before fixing, the second screw rod 12 drives the movable claw 14 away from the fixed claw 13 so that the distance between the two is greater than the thickness of the tabletop. Then, the fixing clamp 1 is moved so that the tabletop is located between the movable claw 14 and the fixed claw 13 (to improve the fixing effect, anti-slip protrusions or anti-slip stripes are provided on the clamping surfaces (the opposing surfaces) of the fixed claw 13 and the movable claw 14).

[0036] Then the second screw rod 12 drives the movable claw 14 to move toward the fixed claw 13 to clamp the table top and fix it.

[0037] The support plate 2 is fixed to the fixing clamp 1 by rotating the first screw 10 to increase the distance between the pressing portion 11 and the second vertical plate 8 to a distance greater than the thickness of the support plate 2. The support plate 2 is then placed between the pressing portion 11 and the second vertical plate 8. The first screw 10 is rotated in the opposite direction, moving the first screw 10 toward the support plate 2 until the pressing portion 11 presses the support plate 2 against the second vertical plate 8.

[0038] After the support plate 2 is fixed, the fixing plate 3 is installed on the support plate 2 .

[0039] The traction sheave 6 is placed on the rotating drive portion of the testing machine (rotating shaft or rotating table). The wire rope 5 is then passed through the sheave groove of the traction sheave 6, and both ends of the wire rope 5 are passed through the first through-holes 18 of the fixed disk 3. The ends of the wire rope 5 are locked by the wire clamp 4 to prevent the wire rope 5 from escaping the fixed disk 3. When the testing machine drives the traction sheave 6 to rotate, the traction sheave 6 and the wire rope 5 rotate relative to each other, and the friction test between them begins. The axis of the traction sheave 6 is vertical, and the fixed disk 3 is a semi-circular ring structure with its axis also set vertically. The multiple first through-holes 18 on the fixed disk 3 correspond to different connection positions of the ends of the wire rope 5. When the connection position of the wire rope 5 on the fixed disk 3 is different, the contact area between the wire rope 5 and the traction sheave 6 varies, allowing friction tests to be performed under different test conditions.

[0040] When it is necessary to apply different loads to the steel wire rope 5 for testing, a loop is formed at the end of the steel wire rope 5 and a weight 19 is hung on the loop according to the test load.

[0041] The fixture of the utility model can be used in conjunction with a vertical universal friction and wear testing machine to carry out friction tests on wire ropes and traction sheaves. During the test, the test load can be adjusted by adding or removing weights. At the same time, the contact area between the wire rope and the traction sheave can be adjusted by changing different connection positions of the wire rope on the fixed disk.

[0042] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Instead, the present invention can be used in various other combinations, modifications, and environments and can be modified within the scope of the concept described herein through the above teachings or techniques or knowledge in the relevant fields. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention are intended to be protected by the claims appended hereto.

Claims

1. A friction test fixture for a traction sheave and a steel wire rope of a vertical universal friction and wear testing machine, characterized by: It includes a fixing clamp, a support plate, a fixing disk and a wire clamp, wherein the support plate is vertically arranged, the support plate is connected to the fixing clamp, and the fixing disk is connected to the support plate; The fixing clip is used to connect to the testing machine; The fixing plate is used to cooperate with the wire clamp to tighten the two ends of the wire rope so that the wire rope is tightly wound around the wheel groove of the traction wheel.

2. The friction test fixture for the traction sheave and wire rope of the vertical universal friction and wear testing machine according to claim 1, characterized in that: The support plate is detachably connected to the fixing clip.

3. The friction test fixture for the traction sheave and wire rope of the vertical universal friction and wear testing machine according to claim 2, characterized in that: The fixing clamp includes a first vertical plate, a second vertical plate, and a horizontal plate connecting the first vertical plate and the second vertical plate, wherein the first vertical plate, the second vertical plate, and the horizontal plate form a U-shaped bracket structure, the first vertical plate is threadedly connected to a first screw, the end of the first screw extends between the first vertical plate and the second vertical plate, and the portion of the first screw located between the first vertical plate and the second vertical plate is provided with a pressing portion; The second vertical plate is provided with a fixed claw, a slide rail and a movable claw. The movable claw is slidably arranged on the slide rail. The movable claw is connected to a driving member. The driving member is used to drive the movable claw to move closer to or away from the fixed claw and can fix the movable claw at any position of the movement.

4. The friction test fixture for the traction sheave and wire rope of a vertical universal friction and wear testing machine according to claim 3, characterized in that: The driving member includes a second screw rod, the movable claw is provided with a first threaded hole, and the second screw rod is connected to the movable claw through the first threaded hole.

5. The friction test fixture for the traction sheave and wire rope of the vertical universal friction and wear testing machine according to claim 4, characterized in that: A handle is provided at one end of the second screw away from the movable claw.

6. The friction test fixture for the traction sheave and wire rope of a vertical universal friction and wear testing machine according to claim 4, characterized in that: The axis of the first screw and the axis of the second screw are perpendicular to each other.

7. The friction test fixture for the traction sheave and wire rope of a vertical universal friction and wear testing machine according to claim 1, characterized in that: The fixing plate is an arc-shaped structure with an opening, and a plurality of first through holes for the ends of the steel wire ropes to pass through are evenly arranged on the fixing plate along the vertical direction.

8. The friction test fixture for the traction sheave and wire rope of a vertical universal friction and wear testing machine according to claim 1, characterized in that: The wire clamp includes a locking seat and a U-shaped locking rod. The locking seat is provided with two second through holes. Both ends of the locking rod pass through the second through holes and are locked by nuts.

9. The friction test fixture for the traction sheave and wire rope of a vertical universal friction and wear testing machine according to claim 1, characterized in that: The utility model further comprises weights, which are suspended at both ends of the steel wire rope.

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