A hand chain hoist tension testing machine

Abstract

A kind of hand chain hoist tension testing machine, belong to hand chain hoist test technical field.It includes main frame, the hand chain hoist (3) to be measured is hung in the top of main frame, load (13) is set in the lower part in main frame, the lifting hook of hand chain hoist (3) is connected with load (13), drive motor (5) is also set in main frame, motor shaft of drive motor (5) is connected with hand chain hoist (3) hand pull chain, its characterized in that: adjusting mechanism is set in main frame, drive motor (5) is position-adjustably installed in main frame by adjusting mechanism.In the hand chain hoist tension testing machine of the present application, drive motor is position-adjustably installed in main frame by adjusting structure, so that drive motor is matched with different models after adjustment, and the applicability is improved.

Description

Technical Field

[0001] A tensile testing machine for hand chain hoists belongs to the field of hand chain hoist testing technology. Background Technology

[0002] A hand chain hoist is a common type of manual lifting equipment in existing technology. Its basic principle is based on mechanical principles; human power drives a chain to generate traction. Through gear transmission, a small gear drives a large gear, transmitting amplified torque to drive the lifting chain and lift the load. To verify the load-bearing capacity and reliability of the hand chain hoist in practical use, a tensile test is required.

[0003] When conducting a tensile test on a manual chain hoist, a simulated load of preset weight is applied to the hoist's hook. Then, the chain is pulled, and the tensile force borne by the chain is measured to determine the hoist's performance. Traditional tensile tests are typically conducted by manually pulling the chain, a method that is not only less safe but also has lower safety standards. Therefore, some technical solutions for automating tensile testing have emerged on the market. In these solutions, a motor is generally used as the power source to pull the chain lock to achieve the lifting action of the hand chain hoist. Examples include the technical solutions described in Chinese utility model patents with application number 201320676698.X, application date October 19, 2013, entitled "A Hand Chain Hoist Testing Machine"; Chinese utility model patents with application number 202211337205.X, application date October 28, 2022, entitled "A Hand Chain Hoist Fatigue Durability Testing Machine"; and Chinese utility model patents with application number 202311495486.6, application date November 8, 2023, entitled "Automatic Testing System and Testing Method for Manual Chain Hoists".

[0004] However, the existing technologies, including the above-mentioned technical solutions, also have the following drawbacks: (1) The simulated load test is generally achieved through a hydraulic mechanism. Although this method can achieve dynamic load, it also requires a special hydraulic system for the test device, which has a high implementation cost. (2) In the existing technology, the drive motor that drives the hand chain hoist is fixedly set. Therefore, when testing different models of hand chain hoists, it is often difficult to be at a suitable pulling angle, which to some extent causes a decrease in the accuracy of the test. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a tensile testing machine for hand chain hoists in which the drive motor is adjustable and installed in the main frame through an adjustment structure, so that the drive motor can be adjusted to match different models of hand chain hoists, thereby improving the applicability of the hand chain hoist.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: the tensile testing machine for the hand chain hoist includes a main frame, the hand chain hoist to be tested is hung on the top of the main frame, a load is set in the lower part of the main frame, the lifting hook of the hand chain hoist is connected to the load, a drive motor is also set in the main frame, and the motor shaft of the drive motor is connected to the hand chain lock of the hand chain hoist. The feature is that an adjustment mechanism is set in the main frame, and the drive motor is installed in the main frame in an adjustable position through the adjustment mechanism.

[0007] Preferably, the adjustment mechanism includes a fixed plate disposed at the bottom of the main frame, an adjustment frame slidably mounted on the surface of the fixed plate, an mounting frame slidably mounted on the surface of the adjustment frame, and a drive motor mounted on the surface of the mounting frame.

[0008] Preferably, a bottom guide groove is provided on the surface of the fixing plate, the adjusting frame is installed in the bottom guide groove, a top guide groove is provided on the upper part of the adjusting frame, and the mounting frame is installed in the top guide groove; the bottom guide groove and the top guide groove are perpendicular to each other.

[0009] Preferably, the load is a heavy object set inside the main frame, and a guide shaft for guiding the lifting and lowering of the heavy object is provided inside the main frame.

[0010] Preferably, a pad is provided inside the main frame, and the load is placed on the surface of the pad.

[0011] Preferably, a tension sensor is installed at the top of the main frame, and the hand chain hoist is attached to the bottom of the tension sensor.

[0012] Preferably, a drive wheel is mounted on the motor shaft of the drive motor via a torque sensor, and the drive wheel is connected to the hand chain of the hand chain hoist.

[0013] Compared with the prior art, the beneficial effects of this utility model are: In the tensile testing machine for hand chain hoists of this application, the drive motor is adjustablely installed in the main frame through an adjustment structure, so that the drive motor can be adjusted to match different models of hand chain hoists, thereby improving applicability.

[0014] In the tensile testing machine for the hand chain hoist of this application, the load is achieved by a weight placed at the bottom of the main frame, which greatly reduces the cost compared to the existing technology which generally uses a hydraulic mechanism.

[0015] In the tensile testing machine for the hand chain hoist of this application, a guide shaft is set to guide the load during the lifting and lowering process. Attached Figure Description

[0016] Figure 1 This is an isometric drawing of a tensile testing machine for a hand chain hoist.

[0017] Figure 2 This is a front view of a tensile testing machine for hand chain hoists.

[0018] Figure 3 for Figure 2 The right view.

[0019] The components include: 1. Top beam; 2. Tension sensor; 3. Hand chain hoist; 4. Lifting chain; 5. Drive motor; 6. Column; 7. Adjusting frame; 8. Fixing plate; 9. Base frame; 10. Mounting frame; 11. Drive wheel; 12. Guide shaft; 13. Load; 14. Pad block. Detailed Implementation

[0020] Figures 1-3 This is the preferred embodiment of the present invention, which is described below in conjunction with the appendix. Figures 1-3 The present invention will be further described below.

[0021] like Figures 1-3 As shown, a tensile testing machine for a hand chain hoist includes a main frame, which includes a base frame 9 and two columns 6 vertically fixed on both sides of the surface of the base frame 9. The two columns 6 are connected and fixed at the top by a top beam 1.

[0022] A tension sensor 2 is attached to the middle of the lower surface of the top beam 1. A lifting ring is installed at the other end of the tension sensor 2. The hook at the top of the chain hoist 3 to be tested is connected to the tension sensor 2 through the lifting ring. The lifting hook at the bottom of the chain hoist 3 hangs down naturally to the upper part of the base frame 9 along with the lifting chain 4. A load 13 is placed on the surface of the base frame 9. A hook is installed on the surface of the load 13, and the lifting hook at the bottom of the lifting chain 4 in the chain hoist 3 is engaged with the hook on the surface of the load 13.

[0023] Multiple pads 14 are arranged in a rectangular shape on the surface of the base frame 9. The load 13 is placed on the surface of the pads 14. Two guide shafts 12 are also arranged opposite each other on the surface of the base frame 9. The arrangement direction of the two guide shafts 12 is perpendicular to the arrangement direction of the two columns 6. The two guide shafts 12 pass through the load 13 respectively, so as to guide the load 13 during the lifting and lowering process, and facilitate the replacement of different loads 13 when conducting different important tensile tests.

[0024] A fixing plate 8 is horizontally arranged on the surface of the base frame 9, and an adjusting frame 7 is fixed on the surface of the fixing plate 8. Multiple bottom guide grooves are formed on the surface of the fixing plate 8, and the adjusting frame 7 is slidably mounted on the surface of the fixing plate 8 through the guide grooves. Multiple top guide grooves are also formed on the surface of the adjusting frame 7, with the opening directions of the top guide grooves perpendicular to each other. A mounting frame 10 is also provided on the surface of the adjusting frame 7, and the mounting frame 10 is slidably connected to the adjusting frame 7 through the top guide grooves. A drive motor 5 is fixed to the side of the mounting frame 10. Therefore, the adjustment of the drive motor 5 above the base frame 9 can be achieved through the multiple perpendicular bottom guide grooves and multiple top guide grooves.

[0025] After the drive motor 5 is fixed on the surface of the mounting bracket 10, its motor shaft passes through the mounting bracket 10. A torque sensor is installed on the motor shaft of the drive motor 5. The body of the torque sensor is coaxially fixed with the motor shaft of the drive motor 5. A drive wheel 11 is coaxially fixed on the shaft of the torque sensor. The drive wheel 11 is preferably implemented as a sprocket.

[0026] The signal output terminals of the torque sensor and tension sensor 2 are connected to the main control panel on the side (not shown in the figure).

[0027] The specific working process and working principle are as follows: According to the experimental requirements, the load 13 of different weights is changed. Then, the hook on the top of the chain hoist 3 to be tested is hung on the hanging ring at the bottom of the tension sensor 2. At the same time, the lifting hook at the bottom of the lifting chain 4 in the chain hoist 3 is connected to the hook on the surface of the load 13.

[0028] Adjust the relative positions of the adjusting frame 7 and the fixed plate 8, as well as the relative positions of the mounting frame 10 and the adjusting frame 7, to achieve the position of the drive motor 5 on the surface of the mounting frame 10. At the same time, connect the hand chain lock (not shown in the figure) of the hand chain hoist 3 to the drive wheel 11. After the hand chain lock and the drive wheel 11 are reliably engaged, lock the relative positions of the adjusting frame 7 and the fixed plate 8, as well as the relative positions of the mounting frame 10 and the adjusting frame 7.

[0029] Start the drive motor 5. The drive motor 5 drives the drive wheel 11 to rotate via the torque sensor. When the drive wheel 11 rotates, it pulls the hand chain of the hand chain hoist 3, simulating the action of a worker pulling the hand chain hoist 3. When the tension sensor 2 shows that the load 13 has reached the preset weight, the tension of the hand chain in the hand chain hoist 3 is calculated by multiplying the output value of the torque sensor by the radius of the drive wheel 11.

[0030] The drive motor 5 is preferably a servo motor. By controlling the forward and reverse rotation of the servo motor, the continuous action of lifting and releasing the hand chain hoist 3 can be tested.

[0031] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A tensile testing machine for a hand chain hoist, comprising a main frame, a hand chain hoist (3) to be tested being hung on the top of the main frame, a load (13) being provided in the lower part of the main frame, the lifting hook of the hand chain hoist (3) being connected to the load (13), and a drive motor (5) being provided in the main frame, the motor shaft of the drive motor (5) being connected to the hand chain lock of the hand chain hoist (3), characterized in that: An adjustment mechanism is provided inside the main frame, and the drive motor (5) is installed inside the main frame in an adjustable position through the adjustment mechanism.

2. The tensile testing machine for a hand-operated hoist according to claim 1, characterized in that: The adjustment mechanism includes a fixed plate (8) set at the bottom of the main frame, an adjustment frame (7) slidably mounted on the surface of the fixed plate (8), an installation frame (10) slidably mounted on the surface of the adjustment frame (7), and a drive motor (5) mounted on the surface of the installation frame (10).

3. The tensile testing machine for a hand-operated hoist according to claim 2, characterized in that: A bottom guide groove is provided on the surface of the fixed plate (8), and the adjustment frame (7) is installed in the bottom guide groove. A top guide groove is provided on the upper part of the adjustment frame (7), and the mounting frame (10) is installed in the top guide groove. The bottom guide groove and the top guide groove are perpendicular to each other.

4. The tensile testing machine for a hand-operated hoist according to claim 1, characterized in that: The load (13) is a heavy object set in the main frame, and a guide shaft (12) is set in the main frame to guide the lifting and lowering of the heavy object.

5. The tensile testing machine for a hand-operated hoist according to claim 4, characterized in that: A pad (14) is provided inside the main frame, and the load (13) is placed on the surface of the pad (14).

6. The tensile testing machine for a hand-operated hoist according to claim 1, characterized in that: A tension sensor (2) is installed at the top of the main frame, and a hand chain hoist (3) is attached to the bottom of the tension sensor (2).

7. The tensile testing machine for a hand-operated hoist according to claim 1, characterized in that: A drive wheel (11) is mounted on the motor shaft of the drive motor (5) via a torque sensor. The drive wheel (11) is connected to the hand chain of the hand chain hoist (3).

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