Testing device for chain block

Abstract

The invention provides a chain block testing device which comprises two pairs of stand columns, a cross beam is installed between each pair of stand columns, L-shaped protection plates are installed on the two sides of each cross beam, a fixing arm is horizontally installed between the cross beams, and the middle of the fixing arm is connected with a first guide seat through a tension sensor. A first connector is vertically and slidably connected into the first guide seat, a first driving part capable of driving the first connector to move up and down is installed in the middle of the fixed arm, a traction arm is horizontally and slidably connected between the cross beams, a second guide seat is connected to the middle of the traction arm, and a second connector is vertically and slidably connected into the second guide seat; a second driving part capable of driving the second connector to move up and down is installed in the middle of the traction arm, the middle of the traction arm is further connected with the end of a piston rod of a hydraulic cylinder, a cylinder body of the hydraulic cylinder is connected with a mounting plate, the mounting plate is fixed between the two cross beams, and a taking and placing module used for taking and placing the chain block is further arranged between the cross beams.

Description

Technical Field

[0001] The present invention belongs to the technical field of testing technology for chain hoists, and relates to a testing device for chain hoists. Background Art

[0002] A chain hoist is a common manual lifting tool. During the manufacturing process, in order to ensure that its quality meets the standards, it must undergo a series of strict tensile tests. These tests are to verify the load-bearing capacity of the chain hoist and its reliability in actual use, ensuring that each chain hoist leaving the factory can safely and effectively complete its work mission.

[0003] In order to facilitate the picking and placing of the chain hoist during the testing process, and at the same time, effectively protect the safety of the tester during the test, it is necessary to design a testing device for chain hoists. Summary of the Invention

[0004] The purpose of the present invention is to address the above problems existing in the prior art and propose a testing device for chain hoists.

[0005] The purpose of the present invention can be achieved by the following technical solutions: A testing device for chain hoists includes two pairs of vertical columns, and a cross beam is installed between each pair of vertical columns. It is characterized in that L-shaped protective plates are installed on both sides of the cross beam, a fixed arm is horizontally installed between the cross beams, the middle of the fixed arm is connected to a first guide seat through a tension sensor, a first connecting head is vertically slidably connected in the first guide seat, a driving member one capable of driving the first connecting head to move up and down is installed in the middle of the fixed arm, a traction arm is horizontally slidably connected between the cross beams, a second guide seat is connected to the middle of the traction arm, a second connecting head is vertically slidably connected in the second guide seat, a driving member two capable of driving the second connecting head to move up and down is installed in the middle of the traction arm, the middle of the traction arm is also connected to the end of the piston rod of a hydraulic cylinder, the cylinder body of the hydraulic cylinder is connected to a mounting plate, the mounting plate is fixed between the two cross beams, and a picking and placing module for picking and placing the chain hoist is also provided between the cross beams.

[0006] An operation opening is provided on one of the protective plates, and a closing plate is hinged to the operation opening through a hinge.

[0007] A handle is also installed on the closing plate.

[0008] Positioning blocks are installed on both sides of the traction arm, and wheels matched with the cross beam are installed on the positioning blocks.

[0009] The pick-and-place module includes a movable table, a telescopic placement table, side guide plates, and a U-shaped frame. The side guide plates are installed on the cross beam. Two L-shaped grooves are provided on the side guide plates. The middle part of the U-shaped frame has two guide wheels, one of which is arranged in one of the L-shaped grooves and the other is arranged in the other L-shaped groove. One end of the U-shaped frame is connected to one end of the movable table, and the other end of the U-shaped frame is hinged to one end of a linkage rod through a pin shaft. The linkage rod is hinged to the middle part of the closing plate. The telescopic placement table is connected to the movable table through a switchable one-way control component, and the telescopic placement table can be unfolded or folded relative to the movable table. Auxiliary placement ears I and II are respectively provided on both sides of the telescopic placement table.

[0010] A plurality of vertical rod bodies are also detachably installed on the telescopic placement table.

[0011] The switchable one-way control component includes a pair of toothed columns, a pair of one-way limit parts, a movable frame, an eccentric wheel, a switching arm, and a handle. The toothed columns are horizontally installed on the movable table. The movable frame is horizontally slidably connected to the toothed columns. The switching arm is vertically slidably connected to the movable frame. The middle part of the movable frame has a square working notch part. The eccentric wheel is arranged in the square working notch part. The eccentric wheel is connected to the handle through a linkage shaft. The linkage shaft is also rotatably connected to the telescopic placement table through a substrate. The one-way limit parts are horizontally slidably connected to the side part of the switching arm. A spring is also provided between the one-way limit parts and the switching arm. The one-way limit parts have two one-way limit upper teeth and one-way limit lower teeth with opposite directions, and both the one-way limit upper teeth and the one-way limit lower teeth can cooperate with the toothed columns. The shapes of the one-way limit upper teeth and the one-way limit lower teeth are both right-angled trapezoids.

[0012] It also includes control cabinets and computer mainframes arranged on both sides of the cross beam.

[0013] Compared with the prior art, the testing device of this chain block has the following advantages: In the present invention, by using the pick-and-place module, the chain block can be conveniently picked up and placed at the protective plate during the testing process. This operation can be completed at a relatively high position, avoiding the need to bend down. During the testing stage, the chain block is placed at a relatively low position, ensuring that the protective plate can play its effective protective role. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a three-dimensional structural schematic diagram of the present invention; Figure 2 is a partial enlarged view of A; Figure 3 is a planar structural schematic diagram of the present invention; Figure 4 is a three-dimensional structural schematic diagram of the removed part of the present inventionFigure 1 ; Figure 5 is a schematic three-dimensional structure of the removed part of the present invention Figure 2 ; Figure 6 is a schematic three-dimensional structure of the removed part of the present invention Figure 3 ; Figure 7 is a cross-sectional view of the removed part of the present invention; Figure 8 is a schematic three-dimensional structure diagram of the one-way limiting member in the present invention; In the figure, 1, vertical column; 2, computer mainframe; 3, fixed arm; 4, hinge; 5, handle; 6, closing plate; 7, protection plate; 8, control cabinet; 9, hydraulic cylinder; 10, mounting plate; 11, traction arm; 12, telescopic placement table; 13, cross beam; 14, vertical rod body; 15, driving member two; 16, second guide seat; 17, second connecting head; 18, positioning block; 19, wheel; 20, auxiliary placement ear two; 21, auxiliary placement ear one; 22, first guide seat; 23, first connecting head; 24, tension sensor; 25, driving member one; 26, movable table; 27, U-shaped frame; 28, chain block; 28a, fixed hook; 28b, hanging hook; 29, guide wheel; 30, side guide plate; 30a, L-shaped groove; 31, linkage rod; 32, pin shaft; 33, handle; 34, base plate; 35, linkage shaft; 36, toothed column; 37, movable frame; 37a, square working notch part; 38, one-way limiting member; 38a, one-way limiting upper tooth; 38b, one-way limiting lower tooth; 39, hand-twist knob; 40, switching arm; 41, spring; 42, eccentric wheel. Detailed implementation manners

[0015] The following are specific embodiments of the present invention and in combination with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0016] Such as Figures 1-8As shown in the figure, the test device of this chain block includes two pairs of vertical columns 1. Between each pair of vertical columns 1, a cross beam 13 is installed. In this embodiment, there is a certain distance between the two cross beams 13. On both sides of the cross beam 13, L-shaped protective plates 7 are installed. Horizontally between the cross beams 13, a fixed arm 3 is installed. The middle part of the fixed arm 3 is connected to a first guide seat 22 through a tension sensor 24. In this embodiment, the tension sensor 24 uses an existing product. Vertically and slidably connected in the first guide seat 22 is a first connection head 23. In the middle of the fixed arm 3, a first driving member 25 capable of driving the first connection head 23 to move up and down is installed. Horizontally and slidably connected between the cross beams 13 is a traction arm 11. In the middle of the traction arm 11, a second guide seat 16 is connected. Vertically and slidably connected in the second guide seat 16 is a second connection head 17. In the middle of the traction arm 11, a second driving member 15 capable of driving the second connection head 17 to move up and down is installed. In this embodiment, both the first driving member 25 and the second driving member 15 use existing structures. When needed, they can move the first connection head 23 and the second connection head 17 upward and insert them into the fixed hook 28a and the hanging hook 28b of the chain block 28. The fixed hook 28a is used to install and fix the whole chain block 28, while the hanging hook 28b is used to hang an object when needed. The middle part of the traction arm 11 is also connected to the piston rod end of a hydraulic cylinder 9. The cylinder body of the hydraulic cylinder 9 is connected to a mounting plate 10. With this structure, the traction arm 11 can be driven to move by the hydraulic cylinder 9, thereby completing the load-bearing capacity test of the chain block. The mounting plate 10 is fixed between the two cross beams 13. Between the cross beams 13, there is also a pick-up and placement module for the chain block to be picked up and placed.

[0017] An operation opening is provided on one of the protective plates 7. At the operation opening, a closing plate 6 is hinged through a hinge 4. A handle 5 is also installed on the closing plate 6.

[0018] Positioning blocks 18 are installed on both sides of the traction arm 11. Wheels 19 that cooperate with the cross beam 13 are installed on the positioning blocks 18. With this structure, by the cooperation of the wheels 19 and the cross beam 13, the reciprocating movement of the traction arm 11 can be made more stable and reliable.

[0019] The pick-and-place module includes a movable table 26, a telescopic placement table 12, side guide plates 30, and a U-shaped frame 27. The side guide plates 30 are installed on the cross beam 13. Two L-shaped grooves 30a are formed on the side guide plates 30. There are two guide wheels 29 in the middle of the U-shaped frame 27. One of the guide wheels 29 is arranged in one of the L-shaped grooves 30a, and the other guide wheel 29 is arranged in the other L-shaped groove 30a. One end of the U-shaped frame 27 is connected to one end of the movable table 26. The other end of the U-shaped frame 27 is hinged to one end of a linkage rod 31 through a pin shaft 32. The linkage rod 31 is hinged to the middle of a closing plate 6. The telescopic placement table 12 is connected to the movable table 26 through a switchable one-way control assembly, and the telescopic placement table 12 can be unfolded or retracted relative to the movable table 26. Auxiliary placement ears one 21 and auxiliary placement ears two 20 are respectively arranged on both sides of the telescopic placement table 12. A plurality of vertical rod bodies 14 are also detachably installed on the telescopic placement table 12. With this structure, the movable table 26 can be located above one of the cross beams 13, and the telescopic placement table 12 can be unfolded outward relative to the movable table 26. By placing the chain block on the telescopic placement table 12, the fixed hook 28a is located at the auxiliary placement ear one 21, and the hanging hook 28b is located at the auxiliary placement ear two 20, and its shape is adjusted. The linkage rod 31 is rotated 180 degrees through a handle 33, so that the one-way limiting upper tooth 38a cooperates with the tooth-shaped column 36, thereby preventing the telescopic placement table 12 from moving outward when being retracted inward. Then, the closing plate 6 is changed from horizontal to vertical, and the guide wheels 29 can move in the L-shaped grooves 30a, so that the telescopic placement table 12 is in a low position. At this time, the first connector 23 and the second connector 17 are moved upward and inserted into the fixed hook 28a and the hanging hook 28b of the chain block 28, so as to facilitate the pick-and-place of the chain block 28.

[0020] The switchable unidirectional regulation component includes a pair of toothed columns 36, a pair of unidirectional limiting members 38, a movable frame 37, an eccentric wheel 42, a switching arm 40, and a handle 33. The toothed columns 36 are horizontally installed on the movable table 26. The movable frame 37 is horizontally slidably connected to the toothed columns 36. The switching arm 40 is vertically slidably connected to the movable frame 37. The middle part of the movable frame 37 has a square working notch 37a. The eccentric wheel 42 is arranged in the square working notch 37a. The eccentric wheel 42 is connected to the handle 33 through a linkage shaft 35. The linkage shaft 35 is also rotatably connected to the telescopic placement table 12 through a substrate 34. The unidirectional limiting member 38 is horizontally slidably connected to the side of the switching arm 40. There is also a spring 41 between the unidirectional limiting member 38 and the switching arm 40. The switching arm 40 is also provided with a hand-tightening knob 39 for adjusting the elastic force of the spring 41. The hand-tightening knob 39 adopts an existing structure. The unidirectional limiting member 38 has two unidirectional limiting upper teeth 38a and unidirectional limiting lower teeth 38b with opposite directions, and both the unidirectional limiting upper teeth 38a and the unidirectional limiting lower teeth 38b can cooperate with the toothed column 36. The shapes of the unidirectional limiting upper teeth 38a and the unidirectional limiting lower teeth 38b are both right-angled trapezoids. With this structure, by rotating the handle 33 downward by 180 degrees, the eccentric wheel 42 cooperates with the square working notch 37a, causing the switching arm 40 to move downward. At this time, the unidirectional limiting upper teeth 38a are in the working state. By rotating the handle 33 upward by 180 degrees, the eccentric wheel 42 cooperates with the square working notch 37a, causing the switching arm 40 to move upward. At this time, the unidirectional limiting lower teeth 38b are in the working state.

[0021] It also includes a control cabinet 8 and a computer mainframe 2 arranged on both sides of the cross beam 13. The control cabinet 8 and the computer mainframe 2 adopt existing technologies, and they can control the actions of corresponding electrical components to achieve their test operations.

[0022] In the present invention, by using the picking and placing module, the operation of picking and placing the chain block 28 at the protective plate 7 can be conveniently carried out during the test process. This operation can be completed at a relatively high position, avoiding the need to bend down. During the test stage, the chain block 28 is placed at a lower position to ensure that the protective plate 7 can play its effective protective role.

[0023] The above components are all common standard parts or parts known to those skilled in the art. Their structures and principles can all be learned by those skilled in the art through technical manuals or by conventional experimental methods.

[0024] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described specific embodiments or use similar methods to replace them, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A testing device for a hand chain hoist, comprising two pairs of columns (1), a crossbeam (13) being installed between each pair of columns (1), characterized in that: L-shaped protective plates (7) are installed on both sides of the cross beam (13), a fixed arm (3) is installed horizontally between the cross beams (13), the middle of the fixed arm (3) is connected to the first guide seat (22) via a tension sensor (24), a first connector (23) is vertically slidably connected inside the first guide seat (22), a driving member (25) capable of driving the first connector (23) to move up and down is installed in the middle of the fixed arm (3), a traction arm (11) is horizontally slidably connected between the cross beams (13), and the traction arm (11) A second guide seat (16) is connected in the middle, a second connecting head (17) is vertically slidably connected inside the second guide seat (16), a driving member (15) capable of driving the second connecting head (17) to move up and down is installed in the middle of the traction arm (11), the middle of the traction arm (11) is also connected to the end of the piston rod of the hydraulic cylinder (9), the cylinder body of the hydraulic cylinder (9) is connected to the mounting plate (10), the mounting plate (10) is fixed between two cross beams (13), and a pick-and-place module for picking up and placing the hand winch is also provided between the cross beams (13).

2. A testing device for a hand chain hoist according to claim 1, characterized in that: An operating opening is provided on one of the protective plates (7), and the operating opening is hingedly connected to the closing plate (6) via a hinge (4).

3. A testing device for a hand chain hoist according to claim 1, characterized in that: A handle (5) is also mounted on the closing plate (6).

4. A testing device for a hand chain hoist according to claim 1, characterized in that: Positioning blocks (18) are installed on both sides of the traction arm (11), and wheels (19) matching with the crossbeam (13) are installed on the positioning blocks (18).

5. The testing device for a hand chain hoist according to claim 1, characterized in that: The pick-and-place module comprises a movable table (26), a telescopic placement table (12), a side guide plate (30), and a U-shaped frame (27), wherein the side guide plate (30) is mounted on the crossbeam (13), and two L-shaped grooves (30a) are provided on the side guide plate (30), and the U-shaped frame (27) has two guide wheels (29) in the middle, wherein one guide wheel (29) is arranged in one of the L-shaped grooves (30a), and the other guide wheel (29) is arranged in the other L-shaped groove (30a), and the U-shaped frame (27) ) is connected to one end of the movable platform (26), the other end of the U-shaped frame (27) is hinged to one end of the linkage rod (31) through a pin shaft (32), the linkage rod (31) is hinged to the middle of the closing plate (6), the telescopic placement platform (12) is connected to the movable platform (26) through a switchable one-way control component, and the telescopic placement platform (12) can be expanded or retracted relative to the movable platform (26), and the two sides of the telescopic placement platform (12) are respectively provided with an auxiliary placement ear 1 (21) and an auxiliary placement ear 2 (20).

6. A testing device for a hand chain hoist according to claim 5, characterized in that: The telescopic placement platform (12) is also provided with a plurality of vertical rods (14) mounted in a detachable manner.

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