A hand chain hoist test device

Abstract

The present invention relates to the field of lifting equipment, and discloses a hand chain hoist test device, including a tensioning assembly, a clamping assembly, a driving assembly, a micro-motion measuring device and a controller. The tensioning assembly is provided with a tensioning wheel connected to the chain transmission of the hand chain hoist, the clamping assembly is used to clamp the chain of the hand chain hoist, the output end of the driving assembly is fixedly connected to the clamping assembly, and the micro-motion measuring device is used to measure the moving distance of the main chain of the hand chain hoist. The present invention uses the driving assembly and the clamping assembly to cooperate with each other to automatically reciprocate the chain, and does not need to manually pull the chain, thereby improving the efficiency of the test, avoiding the situation where the worker is dirty due to manual pulling, and the working sanitation environment is good, and the labor intensity is reduced.

Description

Technical Field

[0001] The invention relates to the field of lifting equipment, in particular to a hand chain hoist testing device. Background Art

[0002] A hand chain hoist is a manual lifting machine that is easy to use and carry, also known as a "chain hoist" or "falling chain". It is suitable for short-distance lifting of small equipment and goods. The lifting capacity generally does not exceed 10T, and the maximum can reach 20T. The lifting height generally does not exceed 6m. The shell of the hand chain hoist is made of high-quality alloy steel, which is strong and wear-resistant with high safety performance. When the hand chain hoist lifts the heavy object upward, the manual chain is pulled clockwise and the hand chain wheel rotates. When descending, the hand chain is pulled counterclockwise, the brake seat is separated from the brake pad, the ratchet wheel is stationary under the action of the pawl, and the five-tooth long shaft drives the lifting sprocket to run in the opposite direction, thereby smoothly lifting and lowering the heavy object.

[0003] In order to ensure the normal operation and reliable braking of the chain hoist, it is necessary to perform a load test to test whether the various mechanisms are flexible, whether there is any jamming or loose and tight phenomena. The traditional load test is performed by the operator pulling the hand chain back and forth. This method leads to low work efficiency and high labor intensity. The operator's clothes and hands will be stained with oil from the chain, and the working environment is poor. Summary of the invention

[0004] The purpose of the present invention is to provide a hand chain hoist testing device, which can automatically perform a load test on the hand chain hoist without manual pulling and has high working efficiency.

[0005] In order to achieve the above object, the present invention provides a hand chain hoist testing device, comprising:

[0006] A tensioning assembly, wherein the tensioning assembly is provided with a tensioning wheel connected to the chain transmission of the hand chain hoist;

[0007] A clamping assembly, the clamping assembly is used to clamp the chain of the hand chain hoist;

[0008] A driving assembly, wherein an output end of the driving assembly is fixedly connected to the clamping assembly;

[0009] A micro-motion measuring device, which is used to measure the moving distance of the main chain of the hand chain hoist;

[0010] A controller, the controller being used to:

[0011] The controller controls the clamping assembly to clamp or release the chain. When the clamping assembly clamps the chain, the controller controls the driving assembly to drive the clamping assembly to pull or push the chain to rotate around the tensioning wheel. When the clamping assembly releases the chain, the controller controls the driving assembly to drive the clamping assembly to reset. The controller also controls the micro-motion measuring device to measure the moving distance of the main chain of the hand chain hoist.

[0012] Preferably, the tensioning assembly further comprises a mounting seat, a rotating mechanism slidably connected to the top of the mounting seat, and a first cylinder driving the rotating mechanism to slide on the mounting seat, and the rotating mechanism is rotationally connected to the tensioning wheel.

[0013] Preferably, the rotating mechanism includes a connecting plate slidably connected to the mounting seat, a seat bearing arranged on the top of the connecting plate, and a sprocket shaft rotatably connected to the seat bearing, and the sprocket shaft is fixedly connected to the tensioning wheel.

[0014] Preferably, the clamping assembly includes a pulley frame connected to the driving assembly, a second cylinder arranged on the pulley frame, a cylinder connecting block connected to the second cylinder, two connecting rods respectively arranged at both ends of the cylinder connecting block, two rotating shafts respectively vertically arranged at the ends of the two connecting rods, and two clamps respectively arranged on the sides of the two rotating shafts. When the second cylinder is extended, the two clamps move toward each other and clamp the chain through the transmission of the connecting rod and the rotating shaft.

[0015] Preferably, asbestos brake bands are provided on the inner sides of the two clamping jaws.

[0016] Preferably, rollers for supporting the chain are also provided at both ends of the pulley frame.

[0017] Preferably, the driving assembly is a third cylinder.

[0018] Preferably, the micro-motion measuring device includes an adjusting rod, a mounting frame arranged on the adjusting rod, a guide rod arranged on the mounting frame, a first bearing movably mounted on the guide rod through a bearing seat, a friction wheel and a large gear axially connected to the first bearing, a fourth cylinder driving the first bearing to move along the guide rod, a small gear meshing with the large gear, and an encoder axially connected to the small gear.

[0019] Preferably, the test device further comprises a rope stop assembly, wherein the rope stop assembly is arranged between the clamping assembly and the hand hoist and is used to separate the chain.

[0020] Preferably, the rope blocking assembly includes a telescopic rod, a second bearing arranged on the top of the telescopic rod, and a roller axially connected to the second bearing.

[0021] The present invention uses the driving component and the clamping component to cooperate with each other to automatically pull the chain back and forth, without the need for manual chain pulling, thereby improving the efficiency of the test, avoiding the situation where workers are dirty due to manual chain pulling, improving the working sanitation environment, and reducing labor intensity.

[0022] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 A schematic structural diagram of a hand chain hoist testing device according to an embodiment of the present invention is shown;

[0025] Figure 2 A schematic diagram showing the structure of a tensioning assembly of a hand chain hoist testing device according to an embodiment of the present invention is shown;

[0026] Figure 3A A schematic diagram showing the structure of a clamping assembly of a hand chain hoist testing device according to an embodiment of the present invention is shown;

[0027] Figure 3B A top view of a clamping assembly of a chain hoist testing device according to an embodiment of the present invention is shown (without a roller);

[0028] Figure 4A A schematic structural diagram of a micro-motion measuring device of a hand chain hoist testing device according to an embodiment of the present invention is shown;

[0029] Figure 4B A schematic structural diagram (side view) of a micro-motion measuring device of a hand chain hoist testing device according to an embodiment of the present invention is shown;

[0030] Figure 5 A schematic structural diagram of a rope retaining assembly of a hand chain hoist testing device according to one embodiment of the present invention is shown.

[0031] In the figure:

[0032] 1. Tensioning assembly 11. Tensioning wheel

[0033] 12. Mounting seat 13. Rotating mechanism

[0034] 131, connecting plate 132, bearing with seat

[0035] 133, sprocket shaft 14, first cylinder

[0036] 2. Clamping assembly 21. Pulley frame

[0037] 22. Second cylinder 23. Cylinder connecting block

[0038] 24. Connecting rod 25. Rotating axis

[0039] 26. Clamp 27. Roller

[0040] 3. Driving assembly 4. Micro motion measuring device

[0041] 41. Adjustment rod 42. Mounting bracket

[0042] 43. Guide rod 44. First bearing

[0043] 45. Friction wheel 46. Big gear

[0044] 47. Fourth cylinder 48. Pinion

[0045] 49. Encoder 5. Rope stop assembly

[0046] 51. Telescopic rod 52. Second bearing

[0047] 53. Roller DETAILED DESCRIPTION

[0048] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0049] Figure 1 A schematic diagram of the structure of a hand chain hoist test device according to an embodiment of the present invention is shown. Figure 1 The present invention provides a hand chain hoist testing device, comprising:

[0050] A tensioning assembly 1, on which a tensioning wheel 11 connected to the chain drive of the hand chain hoist is provided;

[0051] A clamping assembly 2, the clamping assembly 2 is used to clamp the chain of the hand chain hoist;

[0052] A driving component 3, wherein an output end of the driving component 3 is fixedly connected to the clamping component 2;

[0053] A micro-motion measuring device 4 is used to measure the moving distance of the main chain of the hand chain hoist;

[0054] Controller, the controller is used to:

[0055] The controller controls the clamping assembly 2 to clamp or release the chain. When the clamping assembly 2 clamps the chain, the controller controls the driving assembly 3 to drive the clamping assembly 2 to pull or push the chain to rotate around the tensioning wheel 11; when the clamping assembly 2 releases the chain, the controller controls the driving assembly 3 to drive the clamping assembly 2 to reset; and controls the micro-motion measuring device 4 to measure the moving distance of the main chain of the hand chain hoist.

[0056] The hand chain hoist test device provided in this embodiment includes a tensioning component 1, a clamping component 2, a driving component 3, a micro-motion measuring device 4 and a controller. When measuring the hand chain hoist, it is only necessary to fix the hand chain hoist, and then put the chain on the hand chain hoist on the tensioning wheel 11 for tensioning, connect the hook of the hand chain hoist with the test weight, lift the weight through the lifting mechanism so that the hand chain hoist is loaded, and the driving mechanism 3 is extended into place, and then the controller controls the clamping component 2 to clamp the chain, and the driving component 3 drives the clamping component 2 to pull the chain to rotate around the tensioning wheel 11. When the driving component 3 is retracted into place, the clamping component 2 releases the chain, and then the driving component 3 clamps the chain. The component 2 is pushed back to its original position, which is a process of weight rising; the descending process is opposite to the ascending process. At the beginning, the driving component 3 is retracted into place, the clamping component 2 clamps the chain, and then the driving component 3 drives the clamping component 2 to push the chain to rotate around the tensioning wheel 11. When the driving component 3 is extended into place, the clamping component 2 releases the chain, and then the driving component 3 pulls the clamping component 2 back to its original position. During the movement of the chain, the main chain of the hand winch is also displaced, and the displacement of the main chain is measured by the micro-motion measuring device 4. During the whole process, there is no need for manual repeated pulling of the chain, which reduces the labor intensity and the staff's clothes and bodies will not be contaminated by lubricating oil and other dirt.

[0057] Figure 2 A schematic diagram of the tensioning assembly structure of a hand chain hoist test device according to an embodiment of the present invention is shown. Figure 2 The tensioning assembly 1 may further include a mounting seat 12, a rotating mechanism 13 slidably connected to the top of the mounting seat 12, and a first cylinder 14 driving the rotating mechanism 13 to slide on the mounting seat 12, and the rotating mechanism 13 is rotatably connected to the tensioning wheel 11. In this embodiment, the mounting seat 12 may be a gate-shaped bracket, and a slide groove for the rotating mechanism 13 to slide is provided at the top of the gate-shaped bracket, and the first cylinder 14 may be provided at the bottom of the gate-shaped bracket and connected to the bottom of the rotating mechanism 13, thereby driving the rotating mechanism 13 to slide in the slide groove.

[0058] In addition, the rotating mechanism 13 may include a connecting plate 131 slidably connected to the mounting seat 12, a seat bearing 132 arranged on the top of the connecting plate 131, and a sprocket shaft 133 rotatably connected to the seat bearing 132. The sprocket shaft 133 is fixedly connected to the tensioning wheel 11, so that the tensioning wheel 11 can rotate relative to the rotating mechanism 13.

[0059] When the chain is tensioned, the chain is firstly put on the tensioning wheel 11, and then the first cylinder 14 pulls or pushes the rotating mechanism 13 to slide in the slide groove, thereby changing the tightness of the chain to achieve tensioning of the chain.

[0060] Figure 3A A schematic diagram showing the structure of a clamping assembly of a hand chain hoist testing device according to an embodiment of the present invention is shown; Figure 3B A top view of the clamping assembly of a hand chain hoist test device according to an embodiment of the present invention (without the roller) is shown; see Figure 3A and Figure 3B The clamping assembly 2 includes a trolley frame 21 connected to the driving assembly 3, a second cylinder 22 arranged on the trolley frame 1, a cylinder connecting block 23 connected to the second cylinder 22, two connecting rods 24 respectively arranged at both ends of the cylinder connecting block 23, two rotating shafts 25 respectively arranged vertically at the ends of the two connecting rods 24, and two clamping claws 26 respectively arranged on the sides of the two rotating shafts 25. When the second cylinder 22 is extended, the two clamping claws 26 move toward each other to clamp the chain through the transmission of the connecting rod 24 and the rotating shaft 25. Of course, in order to better install the clamping assembly 2 and the driving assembly 3, a mounting bracket is set on the clamping assembly 2 and the driving assembly 3, and a linear guide rail for the sliding of the clamping assembly 2 is set on the mounting bracket. When the chain is clamped, the second cylinder 22 extends to drive the connecting rod 24 to move, the connecting rod 24 drives the rotating shaft 25 to rotate, and the rotating shaft 25 rotates to drive the clamping claws 26 to clamp the chain. In addition, asbestos brake bands are provided on the inner sides of the two clamping jaws 26. Adding the asbestos brake bands can increase the friction between the clamping jaws 26 and the chain, so that the clamping jaws 26 can hold the chain more tightly.

[0061] Both ends of the pulley frame 21 are also provided with rollers 27 for supporting the chain. The rollers 27 can be arranged in the following manner. First, a pair of columns are arranged on the pulley frame 21, and a rotating shaft is arranged on the top of the columns. The rollers 27 are sleeved on the outside of the rotating shaft. When the chain moves, the chain slides on the outer surface of the roller 27, and also drives the roller 27 to roll.

[0062] Driving component 3 is the third cylinder, which is provided with two signal points, one is the raised position signal, and the other is the retracted position signal. In this example, the stroke of the cylinder is 320 mm.

[0063] Figure 4A A schematic structural diagram of a micro-motion measuring device of a hand chain hoist testing device according to an embodiment of the present invention is shown; Figure 4B FIG. 1 is a schematic diagram (side view) showing a micro-motion measuring device structure of a hand chain hoist test device according to an embodiment of the present invention. Figure 4A and Figure 4BThe micro-motion measuring device 4 includes an adjusting rod 41, a mounting frame 42 arranged on the adjusting rod 41, a guide rod 43 arranged on the mounting frame 42, a first bearing 44 movably mounted on the guide rod 43 through a bearing seat, a friction wheel 45 and a large gear 46 axially connected to the first bearing 44, a fourth cylinder 47 driving the first bearing 44 to move along the guide rod 43, a small gear 48 meshing with the large gear 46, and an encoder 49 axially connected to the small gear 48. Figure 4A As shown, in this embodiment, a pair of guide rods 43 are provided, which are respectively provided at both ends of the mounting frame 42, and the first bearings 44 are also provided in pairs, so that the symmetrical arrangement can better move the friction wheel 45. When measuring the displacement of the main chain, the fourth cylinder 47 first pushes the friction wheel 45 to be close to the main chain of the hand chain hoist. When the main chain moves, the friction wheel 45 is driven to rotate, and the rotation of the friction wheel 45 drives the large gear 45 to rotate, and the large gear 45 drives the small gear 48 to rotate. The encoder 49 obtains the rotation angle of the small gear 48, and converts the angle signal into a distance signal of the main chain movement, thereby obtaining the main chain movement distance.

[0064] Figure 5 A schematic diagram showing the structure of the rope retaining assembly of a hand chain hoist test device according to an embodiment of the present invention is shown; Figure 5 The test device also includes a rope blocking assembly 5, which is arranged between the clamping assembly 2 and the hand chain hoist to separate the chain to prevent the chain in the chain loop from colliding and affecting the test results. The rope blocking assembly 5 may include a telescopic rod 51, a second bearing 52 arranged at the top of the telescopic rod 51, and a roller 53 axially connected to the second bearing 52. A tray may also be arranged at the bottom of the roller 53 to hold the chain and prevent the chain from falling.

[0065] The above-mentioned tensioning wheel 11, clamping jaw 26, and roller 52 are on the same horizontal plane to prevent jamming during the hand winch test and improve the test efficiency. In order to make the tensioning wheel 11, clamping jaw 26, and roller 52 on the same horizontal plane, the mounting seat 12 and the pulley frame 21 can be set to be retractable, so that the working height can be better adjusted and the height can be kept on the same horizontal plane. Since the telescopic rod 51 is retractable, it will not be repeated here.

[0066] Working principle of hand chain hoist: put the test hoist in a fixed position, and after the chain is tensioned by the tensioning wheel 11; the lifting mechanism rises until the test weight is lifted. After the hand chain hoist is loaded, the test program starts, and the number of lifting and lowering times is preset (can be set arbitrarily). Ascending process: the second cylinder 22 acts to clamp the chain, and the signal lights up after it is in place, and the chain is clamped; the clamping component 2 is pulled by the third cylinder (each stroke is 320mm), and the signal lights up after it is in place, and the second cylinder 22 acts to loosen the chain. The clamping component 2 is pushed to the original position by the third cylinder, completing a rise. Descending process: the second cylinder 22 acts to clamp the chain, and the signal lights up after it is in place, and the chain is clamped; the clamping component 2 is pushed by the third cylinder (each stroke is 320mm), and the signal lights up after it is in place, and the second cylinder 22 acts to loosen the chain. The clamping component 2 is pulled to the original position by the third cylinder, completing a descent. Main chain moving distance measurement: The friction wheel 45 is pressed against the main chain (completed by the fourth cylinder 47), and the rising (falling) distance is measured once. The measuring period starts from the chain clamping signal and ends at the push signal of the clamping component 2. The main chain sliding measurement when the hand chain hoist is stationary, the measuring period starts from the release signal of the second cylinder 22 and ends at the clamping signal of the second cylinder. The time interval of each rising or falling action can be set arbitrarily, and the test results can be recorded and printed.

[0067] Test result recording and output: The test data is read out by the encoder 49 in the micro-motion measuring device 4. The measurement interval consists of the values ​​of the encoder 49 in four state intervals: rising, stopping, falling, and stopping. The device can print out the curves of the four intervals and can also display them on the screen. The test data report collected on site can be printed.

[0068] The present invention uses the driving component 3 and the clamping component 2 to cooperate with each other to automatically pull the chain back and forth, without the need for manual chain pulling, thereby improving the efficiency of the test, avoiding the situation where workers are dirty due to manual chain pulling, improving the working hygiene environment, and reducing labor intensity.

[0069] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the present invention. It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0070] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A hand chain hoist test device, characterized in that: include: A tensioning assembly (1), wherein the tensioning assembly (1) is provided with a tensioning wheel (11) connected to the chain transmission of the hand chain hoist; A clamping assembly (2), the clamping assembly (2) being used to clamp the chain of the hand chain hoist; A driving assembly (3), wherein an output end of the driving assembly (3) is fixedly connected to the clamping assembly (2); A micro-motion measuring device (4), the micro-motion measuring device (4) is used to measure the moving distance of the main chain of the hand chain hoist; A controller, the controller being used to: The controller controls the clamping assembly (2) to clamp or release the chain. When the clamping assembly (2) clamps the chain, the controller controls the driving assembly (3) to drive the clamping assembly (2) to pull or push the chain to rotate around the tensioning wheel (11); when the clamping assembly (2) releases the chain, the controller controls the driving assembly (3) to drive the clamping assembly (2) to reset; and controls the micro-motion measuring device (4) to measure the moving distance of the main chain of the hand chain hoist. The micro-motion measuring device (4) comprises an adjusting rod (41), a mounting frame (42) arranged on the adjusting rod (41), a guide rod (43) arranged on the mounting frame (42), a first bearing (44) movably mounted on the guide rod (43) through a bearing seat, a friction wheel (45) and a large gear (46) axially connected to the first bearing (44), a fourth cylinder (47) driving the first bearing (44) to move along the guide rod (43), a small gear (48) meshing with the large gear (46), and an encoder (49) axially connected to the small gear (48).

2. The hand chain hoist testing device according to claim 1, characterized in that: The tensioning assembly (1) further comprises a mounting seat (12), a rotating mechanism (13) slidably connected to the top of the mounting seat (12), and a first cylinder (14) driving the rotating mechanism (13) to slide on the mounting seat (12); the rotating mechanism (13) is rotatably connected to the tensioning wheel (11).

3. The hand chain hoist testing device according to claim 2, characterized in that: The rotating mechanism (13) comprises a connecting plate (131) slidably connected to the mounting seat (12), a seat bearing (132) arranged on the top of the connecting plate (131), and a sprocket shaft (133) rotatably connected to the seat bearing (132), wherein the sprocket shaft (133) is fixedly connected to the tensioning wheel (11).

4. The hand chain hoist testing device according to claim 1, characterized in that: The clamping assembly (2) comprises a pulley frame (21) connected to the driving assembly (3), a second cylinder (22) arranged on the pulley frame (21), a cylinder connecting block (23) connected to the second cylinder (22), two connecting rods (24) respectively arranged at two ends of the cylinder connecting block (23), two rotating shafts (25) respectively arranged vertically at the ends of the two connecting rods (24) and two clamping claws (26) respectively arranged on the sides of the two rotating shafts (25); when the second cylinder (22) is extended, the two clamping claws (26) are driven by the connecting rod (24) and the rotating shaft (25) to move towards each other and clamp the chain.

5. The hand chain hoist testing device according to claim 4, characterized in that: Asbestos brake bands are arranged on the inner sides of the two clamping jaws (26).

6. The hand chain hoist testing device according to claim 4, characterized in that: Both ends of the pulley frame (21) are also provided with rollers (27) for supporting the chain.

7. The hand chain hoist testing device according to claim 1, characterized in that: The driving component (3) is a third cylinder.

8. The hand chain hoist testing device according to claim 1, characterized in that: The test device further comprises a rope blocking assembly (5), wherein the rope blocking assembly (5) is arranged between the clamping assembly (2) and the hand chain hoist and is used to separate the chain.

9. The hand chain hoist testing device according to claim 8, characterized in that: The rope blocking assembly (5) comprises a telescopic rod (51), a second bearing (52) arranged at the top of the telescopic rod (51), and a roller (53) axially connected to the second bearing (52).

Images