Self-weight balance integrated fixture for hoisting and loading fixture

Abstract

The utility model belongs to the technical field of structural strength tests, and particularly relates to a hoisting and loading fixture self-weight balance integrated fixture which comprises a loading actuator, a screw assembly, an outer support, a loading fixture, a connecting rod and an adjusting mechanism. The adjusting mechanism comprises a connecting assembly, a left side balance weight and a right side balance weight. Levers are always in a horizontal state by independently adjusting the balance force of the levers on the two sides of the actuator. The problems that due to the fact that an actuator loading clamp is unbalanced, a lever freely falls, rotates and is stacked, and an actuator is stressed, rotates and deviates, an actuator sensor is subjected to longitudinal and transverse force through composite stacking rotation, changes are complex, uncontrolled actions are prone to being caused, and danger is generated are avoided. And meanwhile, the balancing device belongs to a loading clamp of the loading channel, is integrated with the loading clamp and can synchronously move along with the loading channel, so that the movement change of the loading channel of a large test with hundreds of loading channels is simplified.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of structural strength test, and particularly relates to a self-weight balanced integrated clamp of a hoisting and loading clamp. BACKGROUND

[0002] In structural strength test, many loading channels are located on the upper surface of a test piece, and most of them are loaded by a single actuator after the load at multiple points on the test piece is gradually concentrated through loading clamps, most typically through a multi-stage lever concentration method.

[0003] The loading lever and other loading clamps are hoisted below the actuator. Different loads at both ends of the lever are realized through different lever ratios, the loading transmission point at the middle of the lever is not in the middle of the lever, and the weights on both sides of the loading transmission point at the middle of the lever are inconsistent, some of which are particularly large, so that the lever cannot always be in a horizontal state, such as Figure 1 、 Figure 2 The imbalance of the actuator on both sides also causes the actuator to obviously tilt, and the combined rotation of the lever stack causes the actuator sensor to be subjected to longitudinal and transverse forces, and the change is complex, which easily causes uncontrolled action and danger. After the load is unloaded, the actuator piston rod also extends outward, causing all the multi-stage levers to naturally fall, push and stack each other, such as the levers hooking each other, which has great hidden dangers in the next test. Since the actuator is obviously tilted, the multi-stage levers naturally fall, push and stack each other, the levers of multiple different loading channels hook and stack each other, and interfere with each other, which cannot be loaded in the next test and has great damage risk.

[0004] The current processing method is to keep a distance between different loading channels to prevent the levers from winding, slowly act during unloading and primary loading, and check at any time, and manually process the actuator when it slowly acts to ensure that the levers do not hook each other. However, this method requires the levers to be straightened before each test, and the test personnel need to manually process the actuator when it slowly acts to ensure that the levers do not hook each other. This results in slow loading and personnel processing the levers during loading, which brings personnel risk. If the levers are not processed in time, the levers will hook each other, and there is still a risk of damage during loading.

[0005] Therefore, how to reduce the damage risk during the processing of the unbalanced actuator is a problem to be solved. CONTENT OF THE INVENTION

[0006] The application aims to provide a self-weight balanced integrated clamp of a hoisting and loading clamp to solve the problem that the existing processing of the unbalanced actuator easily causes damage risk.

[0007] The technical scheme of the present application is: a self-weight balanced integrated clamp for hoisting and loading, comprising a loading actuator, a screw assembly, an outer support, a loading clamp, a connecting rod and an adjusting mechanism; the outer support and a test piece are arranged on the ground, the outer support has an inverted U-shaped structure, a crossbeam is arranged at the top of the outer support, and the test piece is arranged at the opening position of the outer support; the loading actuator is inverted above the test piece, the actuator tailstock at the tail of the loading actuator is connected with the screw assembly, the top of the screw assembly is connected with the crossbeam, and the piston rod of the loading actuator is connected with the loading clamp; the connecting rod is connected between the loading clamp and the test piece;

[0008] The adjusting mechanism is arranged on both sides of the loading clamp, and the adjusting mechanism comprises a connecting assembly, a left counterweight and a right counterweight; the connecting assembly is connected with the actuator tailstock of the loading actuator, the left counterweight and the right counterweight are arranged on both sides of the loading actuator respectively, and the left counterweight and the right counterweight are both connected with the connecting assembly; the left counterweight and the right counterweight can both be adjusted in weight; the loading clamp comprises a primary lever and a secondary lever, one side of the secondary lever is hinged with the piston rod of the loading actuator, the other side is hinged with the side wall of the primary lever, and the length of the secondary lever is greater than the length of the primary lever.

[0009] Preferably, the connecting rod comprises a primary connecting rod and a cross connecting rod; one end of the primary connecting rod is hinged with the test piece, and the other end is hinged with the primary lever; one end of the cross connecting rod is hinged with the test piece, and the other end is hinged with the secondary lever.

[0010] Preferably, it further comprises a test piece loading ring, the test piece loading ring is fixed on the test piece, the primary lever is connected with the test piece loading ring through the primary connecting rod, and the secondary lever is connected with the test piece loading ring through the cross connecting rod.

[0011] Preferably, the connecting assembly comprises a balance support, a pulley assembly and an adjusting cable; a first central hole is formed in the middle of the balance support and threadedly matched with the screw assembly, the pulley assembly has two groups and is connected to both ends of the balance support, the adjusting cable has two groups and passes through the two groups of pulley assemblies, one end of one group of the adjusting cable is connected with the first end of the secondary lever, and the other end is connected with the left counterweight; one end of the other group of the adjusting cable is connected with the second end of the secondary lever, and the other end is connected with the right counterweight.

[0012] Preferably, the first end of the secondary lever is provided with a clamping plate seat assembly, the clamping plate seat assembly is connected with the adjusting cable corresponding to the first end of the second lever; the second end of the secondary lever is provided with a fixing bolt, and the fixing bolt is connected with the adjusting cable corresponding to the second end of the second lever.

[0013] Preferably, the balance support comprises a support body, a first central hole is opened in the middle of the support body, a waist-shaped hole is opened on both sides of the support body, a connecting nut is arranged on the screw assembly, the balance support is fixed on the screw assembly by tightening the connecting nut, and the waist-shaped hole is used to connect the pulley assembly.

[0014] Preferably, the pulley assembly comprises a fixed pulley, a pulley seat, a pulley shaft and a bolt assembly; one end of the bolt assembly is connected with the pulley seat, and the other end is connected with the waist-shaped hole; the pulley shaft is fixed to the bottom of the pulley seat, and the fixed pulley is arranged in the pulley seat and is in rolling cooperation with the pulley shaft.

[0015] Preferably, the adjusting cable comprises a cable body, a sleeve end and a threaded end; the sleeve end and the threaded end are arranged at both ends of the cable body respectively, the threaded end can be connected with the left counterweight or the right counterweight, and the sleeve end can be connected with the clamping plate seat assembly or the fixing bolt.

[0016] Preferably, the clamping plate seat assembly comprises a double ear, a long bolt nut assembly, an upper clamping plate, a lower clamping plate and a cable bolt nut assembly; the upper clamping plate and the lower clamping plate are arranged in a corresponding manner and are used to clamp the upper and lower sides of the secondary lever, the long bolt nut assembly is connected between the upper clamping plate and the lower clamping plate to connect and fix the upper clamping plate and the lower clamping plate; the double ear is fixed to the upper clamping plate, the cable bolt nut assembly is connected in the double ear, and the middle part of the cable bolt nut assembly is connected with the sleeve end of the adjusting cable to realize the connection between the adjusting cable and the clamping plate seat assembly.

[0017] Preferably, the secondary lever is composed of two symmetrical channel steels, a connecting groove is formed between the two channel steels, and the upper clamping plate and the lower clamping plate are arranged on the upper and lower sides of the connecting groove respectively.

[0018] Preferably, the left counterweight comprises a bottom plate, a second threaded rod, an open counterweight and a hexagonal long nut; the second threaded rod is vertically arranged and integrally connected with the bottom plate, a plurality of open counterweights are arranged on the bottom plate, the number of the open counterweights is determined according to actual requirements, and the hexagonal long nut is threadedly connected at the top of the second threaded rod to fix the open counterweight.

[0019] Preferably, a single ear is arranged on the secondary lever, the single ear comprises an ear body and a first threaded rod; the ear body is integrally connected with the first threaded rod, the ear body can be directly screwed into the piston rod of the loading actuator, a long rectangular hole is opened in the ear body, and when the actuator piston rod is fully extended, the pin shaft of the loading actuator is located in the middle of the long rectangular hole.

[0020] The hoisting loading clamp self-weight balance integrated clamp has the following advantages:

[0021] 1) The loading fixture is integrated with the loading channel itself, and can be moved freely with the actuator loading point, without the need for separate space, separate installation, and occupation of other loading space positions, making it simple to move and change the loading channel of a large test with hundreds of loading channels. Time and manpower are saved, high-altitude installation work is reduced, and safety is improved;

[0022] 2) Solving practical problems: the imbalance of the actuator loading fixture causes the lever to rotate freely and accumulate, and the actuator is also subjected to rotational deviation, and the combined accumulation and rotation causes the actuator sensor to be subjected to longitudinal and transverse forces, and the changes are complex, which can easily cause uncontrolled action and danger;

[0023] 3) Flexible and extensive: the balance force of the two levers can be adjusted separately, such as changes in the weight of the lever and the ratio of the lever, and the balance device can flexibly adjust the balance force of the two levers, and can adapt to various changes. Moreover, the load spectrum does not need to consider the weight of the lever set, so that the loading load is accurate, the loading is simple and accurate, and errors are reduced.

[0024] 4) Convenient movement and balance, greatly improving work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions provided by the present application, the following will briefly introduce the drawings. Obviously, the drawings described below are only some embodiments of the present application.

[0026] Figure 1 It is a side view of the loading lever tilt axis of the present application;

[0027] Figure 2 It is a loading lever tilt plane schematic diagram of the present application;

[0028] Figure 3 It is a multi-channel lever interference schematic diagram of the present application;

[0029] Figure 4 It is an axial schematic diagram of the balance device structure of the present application;

[0030] Figure 5 It is a front view schematic diagram of the balance device structure of the present application;

[0031] Figure 6 It is a partial structure schematic diagram of the balance device of the present application;

[0032] Figure 7 It is a balance bracket schematic diagram of the present application;

[0033] Figure 8 It is a pulley assembly schematic diagram of the present application;

[0034] Figure 9 It is a steel cable adjustment structure schematic diagram of the present application;

[0035] Figure 10 Figure 8 is a schematic diagram of the card plate seat assembly and the adjusting cable of the present application;

[0036] Figure 11 Figure 9 is a schematic diagram of the left side counterweight of the present application;

[0037] Figure 12 Figure 10 is a schematic diagram of the single ear of the present application.

[0038] 1, test piece; 2, loading actuator; 3, screw assembly; 4, cross beam; 5-1, primary lever; 5-2, secondary lever; 6-1, primary connecting rod; 6-2, cross connecting rod; 7, test piece loading ring; 8, card plate seat assembly; 8-1, double ear; 8-2, long bolt and nut assembly; 8-3, upper card plate; 8-4, lower card plate; 8-5, cable bolt and nut assembly; 9, adjusting cable; 9-1, cable body; 9-2, sleeve end; 9-3, threaded end; 10, left side counterweight; 10-1, base plate; 10-2, second threaded rod; 10-3, open counterweight; 10-4, hexagonal long nut; 11, pulley assembly; 11-1, fixed pulley; 11-2, pulley seat; 11-3, pulley shaft; 11-4, bolt assembly; 12, balance bracket; 12-1, bracket body; 12-2, waist-shaped hole; 12-3, first center hole; 13, right side counterweight; 14, single ear; 14-1, ear body; 14-2, first threaded rod; 14-3, long rectangular hole groove; 15, connecting plate; 16, fixing bolt; 17, pin shaft; 18, connecting nut; 19, actuator tail seat. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0040] The hoisting loading clamp self-weight balance integrated clamp is arranged on the clamp of the actuator itself, and the balance forces of the two side levers can be respectively and individually adjusted on both sides of the actuator, so that the lever is always in a horizontal state.

[0041] As Figures 1-5, including the loading actuator 2, the screw assembly 3, the outer support, the loading clamp, the connecting rod and the adjusting mechanism. The outer support and the test piece 1 are arranged on the ground, the outer support is in an inverted U-shaped structure, the top of the outer support is provided with a crossbeam 4, and the test piece 1 is arranged at the opening position of the outer support. The loading actuator 2 is inverted above the test piece 1, the actuator tail seat 19 at the tail of the loading actuator 2 is connected with the screw assembly 3, the top of the screw assembly 3 is connected with the crossbeam 4, the piston rod of the loading actuator 2 is connected with the loading clamp, and the connecting rod is connected between the loading clamp and the test piece 1.

[0042] The loading clamp comprises a primary lever 5-1 and a secondary lever 5-2, one side of the secondary lever 5-2 is hinged with the piston rod of the loading actuator 2, the other side is hinged with the side wall of the primary lever 5-1, and the length of the secondary lever 5-2 is greater than that of the primary lever 5-1.

[0043] The connecting rod comprises a primary connecting rod 6-1 and a cross connecting rod 6-2, one end of the primary connecting rod 6-1 is hinged with the test piece 1, the other end is hinged with the primary lever 5-1, one end of the cross connecting rod 6-2 is hinged with the test piece 1, and the other end is hinged with the secondary lever 5-2.

[0044] As Figure 6 The adjusting mechanism is arranged on the two sides of the loading clamp, and the adjusting mechanism comprises a connecting assembly, a left side counterweight 10 and a right side counterweight 13. The connecting assembly is connected with the actuator tail seat 19 of the loading actuator 2, the left side counterweight 10 and the right side counterweight 13 are arranged on the two sides of the loading actuator 2 respectively, and the left side counterweight 10 and the right side counterweight 13 are connected with the connecting assembly. The left side counterweight 10 and the right side counterweight 13 can be adjusted in weight.

[0045] During the loading process, the lengths of the piston rods of the two groups of loading actuators 2 are controlled to drive the primary lever 5-1 and the secondary lever 5-2 to deflect, so that different loads are applied to the test piece 1, when the loads on the two sides of the loading actuator 2 are unbalanced, the weights of the left side counterweight 10 or the right side counterweight 13 are adjusted until the balance of the two sides of the loading actuator 2 is achieved.

[0046] By adjusting the balance force of the two levers on the two sides of the actuator separately, the levers are always in a horizontal state. Avoiding the unbalanced loading clamp of the actuator leading to the free falling and rotating of the levers and accumulation, the stress rotation of the actuator deviates, and the combined accumulation and rotation causes the sensor of the actuator to bear longitudinal and transverse forces, and the change is complex, which is easy to cause uncontrolled action and danger. At the same time, the balancing device belongs to the loading clamp of the loading channel, and is integrated with the loading clamp, so that the movement change of the loading channel of a large test with several hundred loading channels is simplified.

[0047] Preferably, the test piece 1 loading ring is fixed to the test piece 1, the first lever 5-1 is connected to the test piece 1 loading ring through the first connecting rod 6-1, and the second lever 5-2 is connected to the test piece 1 loading ring through the cross-level connecting rod 6-2, and the connection is stable.

[0048] Preferably, the connecting assembly comprises a balance support 12, a pulley assembly 11 and an adjusting cable 9. The balance support 12 has a first central hole 12-3 in the middle for screwing with the screw rod assembly 3. The pulley assembly 11 has two groups and is connected to the two ends of the balance support 12. The adjusting cable 9 has two groups and passes through the two groups of pulley assemblies 11. One end of one group of the adjusting cable 9 is connected to the first end of the second lever 5-2, and the other end is connected to the left counterweight 10. One end of the other group of the adjusting cable 9 is connected to the second end of the second lever 5-2, and the other end is connected to the right counterweight 13.

[0049] The second lever 5-2 has different lever ratios on both sides, and the lever connectors on both sides are different. The left counterweight 10 and the right counterweight 13 correspond to the different weights on the left and right sides of the second lever 5-2, respectively.

[0050] Preferably, the first end of the second lever 5-2 is provided with a clamping plate seat assembly 8, and the clamping plate seat assembly 8 is connected to the adjusting cable 9 corresponding to the first end of the second lever. The second end of the second lever 5-2 is provided with a fixing bolt 16, and the fixing bolt 16 is connected to the adjusting cable 9 corresponding to the second end of the second lever.

[0051] As Figure 7 Preferably, the balance support 12 comprises a support body 12-1, and the first central hole 12-3 is arranged in the middle of the support body 12-1. The support body 12-1 has a waist-shaped hole 12-2 on both sides. The screw rod assembly 3 is provided with a connecting nut 18. By tightening the connecting nut 18, the balance support 12 is fixed on the screw rod assembly 3. The waist-shaped hole 12-2 is used to connect the pulley assembly 11.

[0052] The balance of the weights on both sides of the balance support 12 is also borne by the actuator tail seat 19 and the screw rod assembly 3, and does not need to be borne by a separate structure such as other fixed cross beams 4 outside the screw rod assembly 3. That is, the balance device belongs to the loading fixture of the loading channel itself, and belongs to the self-balancing device of the loading fixture of the channel itself, which can move synchronously with the loading channel. In the structural strength test, the loading channel often moves position due to different test load conditions, and the balance device can move synchronously with it, greatly facilitating the change of the loading channel. The work load of the movement change of several hundred loading channels in large-scale tests is amazing, and the integration of the balance device greatly reduces the test work load.

[0053] As Figure 8, preferably, the pulley assembly 11 comprises a fixed pulley 11-1, a pulley seat 11-2, a pulley shaft 11-3 and a bolt assembly 11-4. One end of the bolt assembly 11-4 is connected with the pulley seat 11-2, and the other end is connected with the waist-shaped hole 12-2, and when the bolt is loosened, it can move in the waist-shaped hole 12-2 for position adjustment; the pulley shaft 11-3 is fixed to the bottom of the pulley seat 11-2, and the fixed pulley 11-1 is arranged in the pulley seat 11-2 and rolls with the pulley shaft 11-3. When different secondary levers 5-2 are replaced, the inclination angle of the adjusting cable 9 needs to be adjusted, and the position of the pulley assembly 11 can be moved to meet the different inclination angle adjustment requirements of the adjusting cable 9.

[0054] As Figure 9 , preferably, the adjusting cable 9 comprises a cable body 9-1, a sleeve end 9-2 and a threaded end 9-3. The sleeve end 9-2 and the threaded end 9-3 are arranged at both ends of the cable body 9-1 respectively, the threaded end 9-3 can be connected with the left counterweight 10 or the right counterweight 13, and the sleeve end 9-2 can be connected with the clamping plate seat assembly 8 or the fixing bolt 16.

[0055] As Figure 10 , preferably, the clamping plate seat assembly 8 comprises a double ear 8-1, a long bolt nut assembly 8-2, an upper clamping plate 8-3, a lower clamping plate 8-4 and a cable bolt nut assembly 8-5. The upper clamping plate 8-3 and the lower clamping plate 8-4 are arranged in a corresponding manner and are used to clamp the upper and lower sides of the secondary lever 5-2, the long bolt nut assembly 8-2 is connected between the upper clamping plate 8-3 and the lower clamping plate 8-4 to connect and fix the upper clamping plate 8-3 and the lower clamping plate 8-4; the double ear 8-1 is fixed to the upper clamping plate 8-3, and the cable bolt nut assembly 8-5 is connected in the double ear 8-1, the middle part of the cable bolt nut assembly 8-5 is connected with the sleeve end 9-2 of the adjusting cable 9, realizing the connection between the adjusting cable 9 and the clamping plate seat assembly 8.

[0056] Preferably, the secondary lever 5-2 is composed of two symmetrical channel steels, a connecting groove is formed between the two channel steels, the upper clamping plate 8-3 and the lower clamping plate 8-4 are arranged on the upper and lower sides of the connecting groove respectively, and the clamping plate seat assembly 8 can be freely moved and fixed along the connecting groove by loosening the long bolt nut assembly 8-2.

[0057] As Figure 11 , preferably, the left counterweight 10 comprises a bottom plate 10-1, a second threaded rod 10-2, an open counterweight 10-3 and a hexagonal long nut 10-4. The second threaded rod 10-2 is vertically arranged and integrally connected with the bottom plate 10-1, the open counterweight 10-3 is placed on the bottom plate, and the number of the open counterweight 10-3 is determined according to actual needs, and the hexagonal long nut 10-4 is threadedly connected at the top of the second threaded rod 10-2 to fix the open counterweight 10-3.

[0058] The right counterweight 13 is identical in structure to the left counterweight 10, and details are not repeated.

[0059] As Figure 12 Preferably, the secondary lever 5-2 is provided with a single ear 14, which includes an ear body 14-1 and a first threaded rod 14-2. The ear body 14-1 is integrally connected with the first threaded rod 14-2, and the ear body 14-1 can be directly screwed into the piston rod of the loading actuator 2. A long rectangular hole slot 14-3 is formed in the ear body 14-1. When the actuator piston rod is fully extended, the pin shaft 17 of the loading actuator 2 is located in the middle of the long rectangular hole slot 14-3, so that the secondary lever 5-2 can be ensured not to bear the external force of the end of the actuator piston rod.

[0060] In summary, the present application has the following advantages:

[0061] 1) The loading channel itself is integrated with the loading clamp, and can be freely moved with the actuator loading point of the channel, without the need for separate space, separate installation, and occupation of other loading space positions, so that the movement and change of the loading channel of a large-scale test with hundreds of loading channels are simplified, time and manpower are saved, high-altitude installation work is reduced, and safety is improved;

[0062] 2) The actual problem of unbalanced actuator loading clamps leading to the rotation and accumulation of levers, the rotation and deviation of actuators under force, and the complex changes of actuators under longitudinal and transverse forces, which easily cause uncontrolled actions and dangers, is solved;

[0063] 3) Adaptability: the balance of the two levers can be adjusted separately, such as the change of the weight of the levers and the change of the lever ratio, and the balance device can adjust the balance of the two levers flexibly, adapt to various changes, and make the loading load accurate, the loading simple and accurate, and the error reduced.

[0064] 4) The balance is convenient to move, and the work efficiency is greatly improved.

[0065] Finally, it should be noted that the utility model discloses the embodiment drawings, only relate to the structure involved in the embodiment of the present disclosure, and other structures can refer to the usual design, and in the case of no conflict, the same embodiment and different embodiments of the utility model can be combined with each other.

[0066] Finally: the above only for the preferred embodiment of the utility model, and does not limit the utility model, any modification, equivalent replacement, improvement etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A hoist load clamp self-weight balanced integrated clamp, characterized in that: The device comprises a loading actuator (2), a screw rod assembly (3), an outer support, a loading clamp, a connecting rod and an adjusting mechanism; the outer support and the test piece (1) are arranged on the ground, the outer support is in an inverted U-shaped structure, the top of the outer support is provided with a crossbeam (4), and the test piece (1) is arranged at the opening position of the outer support; the loading actuator (2) is inverted above the test piece (1), the actuator tailstock (19) at the tail of the loading actuator (2) is connected with the screw rod assembly (3), the top of the screw rod assembly (3) is connected with the crossbeam (4), and the piston rod of the loading actuator (2) is connected with the loading clamp; the connecting rod is connected between the loading clamp and the test piece (1); The adjusting mechanism is arranged on the two sides of the loading clamp, and comprises a connecting assembly, a left counterweight (10) and a right counterweight (13); the connecting assembly is connected with the actuator tailstock (19) of the loading actuator (2), the left counterweight (10) and the right counterweight (13) are arranged on the two sides of the loading actuator (2) respectively, and the left counterweight (10) and the right counterweight (13) are both connected with the connecting assembly; the left counterweight (10) and the right counterweight (13) can both be adjusted in weight; the loading clamp comprises a primary lever (5-1) and a secondary lever (5-2), one side of the secondary lever (5-2) is hinged with the piston rod of the loading actuator (2), the other side is hinged with the side wall of the primary lever (5-1), and the length of the secondary lever (5-2) is greater than that of the primary lever (5-1).

2. The integrated self-weight balancing of the hoist load clamp according to claim 1, characterized in that: The connecting rod comprises a primary connecting rod (6-1) and a cross connecting rod (6-2); one end of the primary connecting rod (6-1) is hinged with the test piece (1), and the other end is hinged with the primary lever (5-1); one end of the cross connecting rod (6-2) is hinged with the test piece (1), and the other end is hinged with the secondary lever (5-2).

3. The self-weight balanced integrated fixture for hoisting and loading fixture as claimed in claim 1, wherein: The device further comprises a test piece (1) loading ring, which is fixed on the test piece (1), the primary lever (5-1) is connected with the test piece (1) loading ring through the primary connecting rod (6-1), and the secondary lever (5-2) is connected with the test piece (1) loading ring through the cross connecting rod (6-2).

4. The self-weight balanced integrated fixture for hoisting and loading fixture as claimed in claim 1, wherein: The connecting assembly comprises a balance support (12), a pulley assembly (11) and an adjusting steel cable (9); the middle part of the balance support (12) is provided with a first center hole (12-3) matched with the screw rod assembly (3) in screw thread, the pulley assembly (11) has two groups and is connected to the two ends of the balance support (12) respectively, the adjusting steel cable (9) has two groups and the two groups of adjusting steel cables (9) pass through the two groups of pulley assemblies (11) respectively, among the two groups of adjusting steel cables (9), one end of one group of adjusting steel cables (9) is connected with the first end of the secondary lever (5-2), and the other end is connected with the left counterweight (10); one end of the other group of adjusting steel cables (9) is connected with the second end of the secondary lever (5-2), and the other end is connected with the right counterweight (13).

5. The self-weight balanced integrated fixture for hoisting and loading fixture as claimed in claim 4, wherein: The first end of the secondary lever (5-2) is provided with a clamping plate seat assembly (8) connected with the adjusting cable (9) corresponding to the first end of the secondary lever; the second end of the secondary lever (5-2) is provided with a fixing bolt (16) connected with the adjusting cable (9) corresponding to the second end of the secondary lever.

6. The self-weight balanced integrated fixture for hoisting and loading fixture as claimed in claim 4, wherein: The balance support (12) comprises a support body (12-1), a first central hole (12-3) is arranged in the middle of the support body (12-1), and a waist-shaped hole (12-2) is arranged on both sides of the support body (12-1); a connecting nut (18) is arranged on the screw rod assembly (3), the balance support (12) is fixed on the screw rod assembly (3) by tightening the connecting nut (18), and the waist-shaped hole (12-2) is used for connecting the pulley assembly (11).

7. The self-weight balanced integrated fixture for hoisting and loading fixture as claimed in claim 4, wherein: The pulley assembly (11) comprises a fixed pulley (11-1), a pulley seat (11-2), a pulley shaft (11-3) and a bolt assembly (11-4); one end of the bolt assembly (11-4) is connected with the pulley seat (11-2), and the other end is connected with the waist-shaped hole (12-2); the pulley shaft (11-3) is fixed to the bottom of the pulley seat (11-2), and the fixed pulley (11-1) is arranged in the pulley seat (11-2) and rolls with the pulley shaft (11-3).

8. The self-weight balanced integrated fixture for hoisting and loading fixture as claimed in claim 5, wherein: The adjusting cable (9) comprises a cable body (9-1), a sleeve end (9-2) and a threaded end (9-3); the sleeve end (9-2) and the threaded end (9-3) are arranged at both ends of the cable body (9-1) respectively, the threaded end (9-3) can be connected with the left counterweight (10) or the right counterweight (13), and the sleeve end (9-2) can be connected with the clamping plate seat assembly (8) or the fixing bolt (16).

9. The self-weight balanced integrated fixture for hoisting and loading fixture as claimed in claim 5, wherein: The clamping plate seat assembly (8) comprises a double lug (8-1), a long bolt nut assembly (8-2), an upper clamping plate (8-3), a lower clamping plate (8-4) and a cable bolt nut assembly (8-5); the upper clamping plate (8-3) and the lower clamping plate (8-4) are arranged in correspondence with each other and are used for clamping the upper and lower sides of the secondary lever (5-2), the long bolt nut assembly (8-2) is connected between the upper clamping plate (8-3) and the lower clamping plate (8-4) to connect and fix the upper clamping plate (8-3) and the lower clamping plate (8-4); the double lug (8-1) is fixed to the upper clamping plate (8-3), the cable bolt nut assembly (8-5) is connected in the double lug (8-1), the middle part of the cable bolt nut assembly (8-5) is connected with the sleeve end (9-2) of the adjusting cable (9), and the connection of the adjusting cable (9) and the clamping plate seat assembly (8) is realized.

10. The self-weight balanced integrated fixture for hoisting and loading a fixture as claimed in claim 9, wherein: The secondary lever (5-2) is composed of two symmetrical channel steels, and a connecting groove is formed between the two channel steels, and the upper clamping plate (8-3) and the lower clamping plate (8-4) are arranged on the upper and lower sides of the connecting groove respectively.

11. The self-weight balanced integrated fixture for hoisting and loading fixture as claimed in claim 4, wherein: The left counterweight (10) comprises a chassis (10-1), a second threaded rod (10-2), an open counterweight (10-3) and a hex long nut (10-4); the second threaded rod (10-2) is vertically arranged and integrally connected with the chassis (10-1), the open counterweight (10-3) is placed on the bottom plate, the number of the open counterweight (10-3) is determined according to actual requirements, and the hex long nut (10-4) is threadedly connected at the top of the second threaded rod (10-2) to fix the open counterweight (10-3).

12. The self-weight balanced integrated fixture for hoisting and loading fixtures as claimed in claim 4 wherein: The single ear (14) is arranged on the secondary lever (5-2) and comprises an ear body (14-1) and a first threaded rod (14-2); the ear body (14-1) is integrally connected with the first threaded rod (14-2), the ear body (14-1) can be directly screwed into the piston rod of the loading actuator (2), a long rectangular hole (14-3) is arranged in the ear body (14-1), and when the actuator piston rod is fully extended, the pin shaft (17) of the loading actuator (2) is located in the middle of the long rectangular hole (14-3).

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