A kind of hand-operated hoist test device

Abstract

The present invention relates to the field of lifting equipment, and discloses a lever hoist test device, including a support assembly, a rotating assembly, a connecting rod, a clamping assembly, a driving assembly, a micro-motion measuring device, and a controller. A rotating shaft is provided on the top of the supporting assembly, the rotating assembly is movably sleeved on the outside of the rotating shaft, the connecting rod is provided on the outside of the rotating assembly, and can rotate relative to the rotating assembly, the clamping assembly is slidably connected to the connecting rod, and is used to clamp the handle of the lever hoist, the output end of the driving assembly is rotatably connected to the clamping assembly, and the micro-motion measuring device is in close contact with the main chain of the lever hoist. The present invention clamps the handle of the lever hoist and drives the lever hoist to rotate back and forth through the cooperation of the driving assembly and the clamping assembly, so as to test the lever hoist. This process does not require manual repeated pulling of the handle, which reduces labor intensity and improves test efficiency.

Description

Technical Field

[0001] The invention relates to the field of lifting equipment, and in particular to a lever block testing device. Background Art

[0002] The lever hoist is a manual lifting tool that is easy to use and carry. The lever hoist can be used for lifting, pulling, lowering, calibrating and other operations. The lifting capacity is generally not more than 50T. It is widely used in equipment installation, object lifting, machine pulling, etc. in shipbuilding, power, transportation, construction, mining, post and telecommunications and other industries.

[0003] In order to ensure the normal operation and reliable braking of the lever hoist, it is necessary to conduct 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 handle back and forth. This method requires the operator to repeatedly pull the handle at least 300 times, which consumes a lot of physical energy of the operator, resulting in low work efficiency and high labor intensity. Summary of the invention

[0004] The purpose of the present invention is to provide a lever block testing device, which achieves a testing effect by driving a handle back and forth through a driving component, thereby reducing labor intensity and improving work efficiency.

[0005] In order to achieve the above object, the present invention provides a lever block testing device, comprising:

[0006] A support assembly, wherein a rotating shaft is disposed on the top of the support assembly;

[0007] A rotating assembly, wherein the rotating assembly is movably sleeved on the outer side of the rotating shaft;

[0008] A connecting rod, which is disposed outside the rotating assembly and can rotate relative to the rotating assembly;

[0009] A clamping assembly, the clamping assembly is slidably connected to the connecting rod and is used to clamp the handle of the lever hoist;

[0010] A driving assembly, wherein the output end of the driving assembly is rotatably connected to the clamping assembly and is used to drive the clamping assembly to rotate back and forth around the rotating assembly;

[0011] A micro-motion measuring device, which is in close contact with the main chain of the lever hoist and is used to measure the moving distance of the main chain;

[0012] A controller, the controller being used to:

[0013] The driving assembly is controlled to drive the clamping assembly to rotate back and forth around the rotating assembly, and the micro-motion measuring device is controlled to measure the moving distance of the main chain.

[0014] Preferably, the support assembly includes column bases arranged in pairs and columns arranged on the column bases, and the columns can be telescopic relative to the column bases, and the rotating shaft is arranged on the tops of the two columns.

[0015] Preferably, the outer sides of the column and the column base are both provided with a plurality of opposite sockets, and the sockets are equipped with latches.

[0016] Preferably, the rotating assembly includes a movable plate sleeved on the rotating shaft, a bearing arranged on the movable plate and a swing arm shaft arranged on the bearing, and the bearing is fixedly connected to the connecting rod.

[0017] Preferably, the clamping assembly includes a first slider slidably connected to a connecting rod, a connecting column arranged at the bottom of the first slider, a stud bolt passing through the connecting column, two nuts respectively sleeved on threads at both ends of the stud bolt, two connecting plates respectively arranged on the outsides of the two nuts, two rotating shafts respectively vertically arranged at the ends of the two connecting plates, two clamping claws respectively arranged on the sides of the two rotating shafts, and an adjusting knob arranged at one end of the stud bolt, wherein the adjusting knob drives the stud bolt to rotate when rotating, and the stud bolt drives the two nuts to move toward or away from each other, thereby causing the clamping claw to loosen or clamp the handle through the action of the connecting plate and the rotating shaft.

[0018] Preferably, an asbestos brake band is provided on the inner side of the clamping jaw.

[0019] Preferably, the driving assembly includes an adjusting rod and a first cylinder rotatably connected to the top of the adjusting rod, and an output end of the first cylinder is rotatably connected to the clamping assembly through a connecting piece.

[0020] 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 second 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.

[0021] Preferably, the lever hoist testing device further comprises a switching assembly slidably connected to the connecting rod, wherein the switching assembly is used to rotate a steering block on the lever hoist to change the direction of the chain.

[0022] Preferably, the switching assembly includes a second slider slidably connected to the connecting rod, a rotating cylinder arranged at the bottom of the second slider, a rotating head arranged at the output end of the rotating cylinder, and a clamping head arranged on the rotating head, and the clamping head is engaged with the steering block.

[0023] The present invention clamps the handle of the lever block and drives the lever block to rotate back and forth through the cooperation of the driving assembly and the clamping assembly, so as to test the lever block. This process does not require manual repeated pulling of the handle, thus reducing labor intensity and improving test efficiency.

[0024] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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:

[0026] Figure 1 A schematic structural diagram of a lever hoist test device according to an embodiment of the present invention (without a micro-motion measuring device) is shown;

[0027] Figure 2 Shows Figure 1 Side view of (without drive assembly);

[0028] Figure 3 Shows Figure 2 Sectional view of the middle AA plane;

[0029] Figure 4 A schematic structural diagram of a micro-motion measuring device of a lever hoist test device according to an embodiment of the present invention is shown;

[0030] Figure 5 Shows Figure 4 Side view of.

[0031] In the figure:

[0032] 1. Support assembly 11. Column base

[0033] 12. Column 13. Socket

[0034] 2. Rotating shaft 3. Rotating assembly

[0035] 31. Movable plate 32. Bearing

[0036] 33. Swing arm shaft 4. Connecting rod

[0037] 5. Clamping assembly 51, first slide block

[0038] 52. Connecting column 53. Stud bolt

[0039] 54. Nut 55. Connecting plate

[0040] 56. Rotating axis 57. Gripping jaw

[0041] 58. Adjustment knob 6. Drive assembly

[0042] 61. First adjustment rod 62. First cylinder

[0043] 7. Micro-motion measuring device 71. Second adjusting rod

[0044] 72. Mounting frame 73. Guide rod

[0045] 74. First bearing 75. Friction wheel

[0046] 76, large gear 77, second cylinder

[0047] 78. Pinion 79. Encoder

[0048] 8. Switching component 81. Second slider

[0049] 82. Rotating cylinder 83. Rotating head

[0050] 84. Card head DETAILED DESCRIPTION

[0051] 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.

[0052] Figure 1 A schematic structural diagram of a lever hoist test device according to an embodiment of the present invention (without a micro-motion measuring device) is shown; Figure 4 A schematic diagram showing the structure of a micro-motion measuring device of a lever hoist test device according to an embodiment of the present invention; Figure 1 and Figure 4 This embodiment discloses a lever block test device, which may include:

[0053] A support assembly 1, wherein a rotating shaft 2 is disposed on the top of the support assembly 1;

[0054] The rotating assembly 3 is movably sleeved on the outer side of the rotating shaft 2;

[0055] A connecting rod 4, which is disposed outside the rotating assembly 3 and can rotate relative to the rotating assembly 3;

[0056] A clamping assembly 5, which is slidably connected to the connecting rod 4 and is used to clamp the handle of the lever hoist;

[0057] A driving assembly 6, wherein an output end of the driving assembly 6 is rotatably connected to the clamping assembly 5, and is used to drive the clamping assembly 5 to rotate back and forth around the rotating assembly 3;

[0058] A micro-motion measuring device 7, which is in close contact with the main chain of the lever hoist and is used to measure the moving distance of the main chain;

[0059] Controller, the controller is used to:

[0060] The control driving assembly 6 drives the clamping assembly 5 to rotate back and forth around the rotating assembly 3 and controls the micro-motion measuring device 7 to measure the moving distance of the main chain.

[0061] Specifically, during the test, the lever hoist is first fixed, the lifting times and intervals are set, the hook of the lever hoist is connected to the test weight, the weight is lifted by the lifting mechanism so that the lever hoist is loaded, and then one end of the handle is clamped by the clamping assembly 5, the micro-motion measuring device 7 is close to the main chain of the lever hoist, and the controller controls the driving assembly 6 to move back and forth to control the handle to rotate back and forth, so as to test the lever hoist. This process does not require manual repeated pulling of the handle, which reduces labor intensity and improves test efficiency.

[0062] The support assembly 1 may include a column base 11 arranged in pairs and a column 12 arranged on the column base 11, and the column 12 can be telescopic relative to the column base 11, and the rotating shaft 2 is arranged on the top of the two columns 12. That is to say, the two columns 12 and the rotating shaft 2 form a door-shaped frame to support the entire device, and the column base 11 is installed on the ground through anchor bolts. The outer sides of the column 12 and the column base 11 are both provided with a plurality of relative sockets 13, and the sockets 13 are configured with latches. When adjusting the height, it is only necessary to adjust the column 12 so that the sockets 13 at different heights on the column 12 are opposite to the sockets 13 on the column base 11, and then the height of the rotating shaft 2 can be adjusted by positioning the latch, so that the height of the clamping assembly 5 can be adjusted, so that the clamping claw 57 of the clamping assembly 5 is at the same height as the handle, so that the driving assembly 6 will not deflect in height when driving, so that the hand-operated hoist can be better tested and inspected.

[0063] Please refer to Figure 2 The rotating assembly 3 may include a movable plate 31 sleeved on the rotating shaft 2, a bearing 32 disposed on the movable plate 31, and a swing arm shaft 33 disposed on the bearing 32, wherein the bearing 32 is fixedly connected to the connecting rod 4. In order to fix the movable plate 31, a latch is also disposed on the movable plate 31, and when the movable plate 31 slides to a specified position, the movable plate 31 and the rotating shaft 2 can be fixed by the latch. When the rotating assembly 3 is working, the connecting rod 4 rotates first, driving the bearing 32 to rotate around the swing arm shaft 33.

[0064] The clamping assembly 5 includes a first slider 51 slidably connected to the connecting rod 4, a connecting column 52 arranged at the bottom of the first slider 51, a stud bolt 53 passing through the connecting column 52, two nuts 54 respectively sleeved on the threads at both ends of the stud bolt 53, two connecting plates 55 respectively arranged on the outsides of the two nuts 54, two rotating shafts 56 respectively vertically arranged at the ends of the two connecting plates 55 and two clamping claws 57 respectively arranged on the sides of the two rotating shafts 56, and an adjusting knob 58 arranged at one end of the stud bolt 53. When the adjusting knob 58 rotates, it drives the stud bolt 53 to rotate, and the stud bolt 53 drives the two nuts 54 to move toward or away from each other, and then the clamping claw 57 is loosened or clamped through the action of the connecting plate 55 and the rotating shaft 56. When clamping the handle, first rotate the adjusting knob 58 to make the two nuts 54 move in opposite directions, then the end of the connecting plate 55 connected to the nut 54 rotates, driving the rotating shaft 56 to rotate, and the rotating shaft 56 rotates while driving the clamping jaws 57 to rotate, so that the two clamping jaws 57 approach each other to clamp the handle. In addition, an asbestos brake band is provided on the inner side of the clamping jaw 57, which can increase the friction between the clamping jaw 57 and the handle, so that the clamping jaw 57 can be clamped tighter and will not fall off during the test.

[0065] The driving assembly 6 includes a first adjusting rod 61, a first cylinder 62 rotatably connected to the top of the first adjusting rod 61, and the output end of the first cylinder 62 is rotatably connected to the clamping assembly 5 through a connecting piece. The height of the first adjusting rod 61 is adjustable, and the adjustment method can be to set the first adjusting rod 61 as a telescopic rod, or to adjust the height by using the support assembly 1. When the clamping assembly 5 is driven, the clamping assembly 5 drives the handle to rotate back and forth through the telescopic movement of the first cylinder 62. The cylinder diameter of the first cylinder 62 is 40mm, the stroke is 380mm, and magnetic switches are also provided at both ends of the first cylinder 62. The magnetic switch is used to detect the position of the cylinder stroke, and there is no need to set a machine-controlled valve (or stroke switch) and its mounting frame at both ends of the stroke, and there is no need to set a collision block at the end of the piston rod. The magnetic switch of the cylinder is mainly provided to the controller as a position signal. The controller detects the presence or absence of the magnetic switch signal and realizes position control, in-position stop, and in-position start of the cylinder. Therefore, it is easy to use, compact in structure, high in reliability, long in service life, low in cost, and fast in switch response time.

[0066] Figure 4 A schematic structural diagram of a micro-motion measuring device of a lever hoist test device according to an embodiment of the present invention is shown; Figure 5 Shows Figure 4 For a side view, see Figure 4 and Figure 5The micro-motion measuring device 7 may include a second adjusting rod 71, a mounting frame 72 disposed on the second adjusting rod 71, a guide rod 73 disposed on the mounting frame 72, a first bearing 74 movably mounted on the guide rod 73 through a bearing seat, a friction wheel 75 and a large gear 76 axially connected to the first bearing 74, a second cylinder 77 driving the first bearing 74 to move along the guide rod 73, a small gear 78 meshing with the large gear 76, and an encoder 79 axially connected to the small gear 78. Figure 4 As shown, in this embodiment, a pair of guide rods 73 are provided, which are respectively provided at both ends of the mounting frame 72, and the first bearings 74 are also provided in pairs. Such a symmetrical arrangement can better move the friction wheel 75. When measuring the displacement of the main chain, the second cylinder 77 first pushes the friction wheel 75 to be close to the main chain of the lever hoist. When the main chain moves, the friction wheel 75 is driven to rotate, and the rotation of the friction wheel 75 drives the large gear 75 to rotate, and the large gear 75 drives the small gear 78 to rotate. The encoder 79 obtains the rotation angle of the small gear 78, and converts the angle signal into a distance signal of the main chain movement, thereby obtaining the main chain movement distance.

[0067] Please refer to Figure 2 The lever hoist test device also includes a switching assembly 8 slidably connected to the connecting rod 3. The switching assembly 8 is used to rotate the steering block on the lever hoist to change the direction of the chain. When the chain of the lever hoist is switched upward or downward, there is no need to manually turn the steering block, which makes the operation more convenient and quick, thereby improving work efficiency. Specifically, the switching assembly 8 includes a second slider 81 slidably connected to the connecting rod 3, a rotating cylinder 82 disposed at the bottom of the second slider 81, a rotating head 83 disposed at the output end of the rotating cylinder 82, and a clamping head 84 disposed on the rotating head 83. The clamping head 84 is engaged with the steering block (such as Figure 3 When the steering block is switched, the height of the switching assembly 8 is first adjusted through the support assembly 1 so that the buckle 84 and the steering block are at the same horizontal plane, and then the clamping head 84 is engaged with the steering block, and the rotating cylinder 82 is started to rotate, so that the clamping head 84 drives the steering block to rotate and reverse, which is convenient and quick.

[0068] Specifically, when measuring the lever hoist, first place the test hoist in a fixed position, manually rotate the adjustment knob to clamp the handle and install the lifting control button, connect the hook of the lever hoist to the test weight, and lift the weight through the lifting mechanism so that the lever hoist can carry the weight. Set the lifting times and interval time. The first cylinder 62 drives the handle to swing and implement the main chain lifting. The lifting conversion is completed by the conversion component 8. The main chain micro-motion measuring device 7 completes the main chain distance measurement work.

[0069] Test result recording and output: Test data is read out by encoder 79 in micro-motion measuring device 7, and the measurement interval consists of the values ​​of encoder 79 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. Test data reports collected on site can be printed.

[0070] The present invention clamps the handle of the lever block and drives the lever block to rotate back and forth through the cooperation of the driving assembly and the clamping assembly, so as to test the lever block. This process does not require manual repeated pulling of the handle, thus reducing labor intensity and improving test efficiency.

[0071] 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.

[0072] 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 lever hoist testing device, characterized in that: include: A support assembly (1), wherein a rotating shaft (2) is arranged on the top of the support assembly (1); A rotating assembly (3), the rotating assembly (3) being movably sleeved on the outer side of the rotating shaft (2); A connecting rod (4), wherein the connecting rod (4) is arranged outside the rotating assembly (3) and is rotatable relative to the rotating assembly (3); A clamping assembly (5), the clamping assembly (5) being slidably connected to the connecting rod (4) and being used for clamping the handle of the lever hoist; A driving assembly (6), wherein an output end of the driving assembly (6) is rotatably connected to the clamping assembly (5) and is used to drive the clamping assembly (5) to rotate back and forth around the rotating assembly (3); A micro-motion measuring device (7), the micro-motion measuring device (7) is in close contact with the main chain of the lever hoist and is used to measure the movement distance of the main chain; A controller, the controller being used to: Controlling the driving component (6) to drive the clamping component (5) to rotate back and forth around the rotating component (3) and controlling the micro-motion measuring device (7) to measure the moving distance of the main chain; The micro-motion measuring device (7) comprises a second adjusting rod (71), a mounting frame (72) arranged on the second adjusting rod (71), a guide rod (73) arranged on the mounting frame (72), a first bearing (74) movably mounted on the guide rod (73) via a bearing seat, a friction wheel (75) and a large gear (76) axially connected to the first bearing (74), a second cylinder (77) driving the first bearing (74) to move along the guide rod (73), a small gear (78) meshing with the large gear (76), and an encoder (79) axially connected to the small gear (78); The support assembly (1) comprises a pair of column bases (11) and columns (12) arranged on the column bases (11), and the columns (12) are telescopic relative to the column bases (11), and the rotating shaft (2) is arranged on the tops of the two columns (12).

2. The lever hoist testing device according to claim 1, characterized in that: A plurality of opposite insertion holes (13) are provided on the outer sides of the column (12) and the column base (11), and the insertion holes (13) are provided with latches.

3. The lever hoist testing device according to claim 1, characterized in that: The rotating assembly (3) comprises a movable plate (31) sleeved on the rotating shaft (2), a bearing (32) arranged on the movable plate (31), and a swing arm shaft (33) arranged on the bearing (32); the bearing (32) is fixedly connected to the connecting rod (4).

4. The lever hoist testing device according to claim 1, characterized in that: The clamping assembly (5) comprises a first slider (51) slidably connected to the connecting rod (4), a connecting column (52) arranged at the bottom of the first slider (51), a stud bolt (53) penetrating the connecting column (52), two nuts (54) respectively sleeved on the threads at both ends of the stud bolt (53), two connecting plates (55) respectively arranged outside the two nuts (54), two rotating shafts (56) respectively arranged vertically at the ends of the two connecting plates (55), two clamping claws (57) respectively arranged on the sides of the two rotating shafts (56), and an adjusting knob (58) arranged at one end of the stud bolt (53), wherein the adjusting knob (58) drives the stud bolt (53) to rotate when rotating, and the stud bolt (53) drives the two nuts (54) to move towards or away from each other, and then the clamping claws (57) loosen or clamp the handle through the action of the connecting plate (55) and the rotating shaft (56).

5. The lever hoist testing device according to claim 4, characterized in that: An asbestos brake band is arranged on the inner side of the clamping jaw (57).

6. The lever hoist testing device according to claim 1, characterized in that: The driving assembly (6) comprises a first adjusting rod (61) and a first cylinder (62) rotatably connected to the top of the first adjusting rod (61); the output end of the first cylinder (62) is rotatably connected to the clamping assembly (5) via a connecting piece.

7. The lever hoist testing device according to claim 1, characterized in that: The lever hoist test device further comprises a switching assembly (8) slidably connected to the connecting rod (3), wherein the switching assembly (8) is used to rotate a steering block on the lever hoist to change the direction of the chain.

8. The lever hoist testing device according to claim 7, characterized in that: The switching assembly (8) comprises a second slider (81) slidably connected to the connecting rod (4), a rotary cylinder (82) arranged at the bottom of the second slider (81), a rotary head (83) arranged at the output end of the rotary cylinder (82), and a clamping head (84) arranged on the rotary head (83), wherein the clamping head (84) is engaged with the steering shift block.

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