Hoisting clamp

Abstract

The utility model belongs to the technical field of hoisting clamps, and discloses a hoisting clamp. The hoisting clamp comprises a clamp base and a hoisting plate arranged on the clamp base, the hoisting plate is used for installing a sample and comprises a frame, supporting bodies, a first supporting assembly and a second supporting assembly, and the multiple supporting bodies are arranged in the frame at intervals; the first supporting assembly is arranged on the outer side of the supporting body and fixedly connected with the supporting body and the frame. The second supporting assemblies are arranged between the adjacent supporting bodies and fixedly connected with the two adjacent supporting bodies. According to the hoisting clamp, the rigidity of the clamp is enhanced, the inherent frequency of each order of the clamp in a constraint state is improved, and the phenomenon that the clamp generates resonance and transmits the resonance to a sample is avoided under the excitation of a vibration table, so that a test amplitude-frequency curve is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of clamps, in particular to a hoisting clamp. Background Art

[0002] There are many types of railway locomotive products with different shapes and sizes. In order to verify whether the products or parts can work normally under various bumps and vibration excitations, matching fixtures are usually designed for testing when doing vibration and impact tests. The tested samples need to be installed on the vibration test bench for strict multi-directional random or sinusoidal vibration tests to verify their structural fatigue strength, working performance and stability. Usually, the tested samples are fixed on the vibration table through test fixtures, and the vibration of the vibration table is transmitted to the test piece.

[0003] In the vibration test of railway locomotive components, many samples are installed by hoisting. Especially when hoisting samples with longer spans, the first-order resonance frequency of the fixture is low due to the long distance between the installation points, and most of the vibration modes are vertical swings. In addition, conventional profile frame fixtures are prone to have resonance frequencies within the test frequency range (5-150Hz), which leads to excessive test levels, causing the test samples to be subjected to unexpected vibration stress and causing sample damage. In order to avoid resonant coupling between the fixture and the product, the first-order natural frequency of the fixture is usually required to be higher than the test frequency. Utility Model Content

[0004] The purpose of the utility model is to provide a lifting fixture, which increases the natural frequency of the fixture without significantly changing the overall size of the fixture, effectively improves the vertical mode (frequency, vibration type) of the fixture, ensures the reliability of the fixture and the safety of the sample, and enables the test to proceed smoothly.

[0005] To achieve this object, the utility model adopts the following technical solutions: a hanging fixture, comprising a fixture base and a hanging plate arranged on the fixture base, the hanging plate is used to install the sample, and the hanging plate comprises: a frame; a supporting body, a plurality of supporting bodies are arranged at intervals in the frame; a first supporting assembly, arranged on the outside of the outermost supporting body, and fixedly connected to the supporting body and the frame; a second supporting assembly, arranged between adjacent supporting bodies, and fixedly connected to two adjacent supporting bodies.

[0006] Preferably, the supporting body includes: a main body portion, which is extended along a first direction, and the two ends of the main body portion along the first direction are respectively fixedly connected to the inner wall of the frame; a bridge portion, which is arranged on one side of the main body portion along a second direction, and has an arched protrusion protruding from the main body portion along a third direction; wherein the first direction, the second direction and the third direction are perpendicular to each other.

[0007] Preferably, the supporting bodies are provided in two numbers, and the two bridge-shaped parts are respectively provided on one side of the two main body parts away from each other along the second direction.

[0008] Preferably, a plurality of connecting members are arranged between the main body parts, and the connecting members and the first supporting assembly are staggered along the first direction.

[0009] Preferably, the hanging plate further comprises: a clamp mounting part, which is arranged on the frame, and a plurality of the clamp mounting parts are provided, and can be connected to the clamp base; a sample mounting part, which is arranged on two adjacent supporting bodies, and a plurality of the sample mounting parts are provided, and is used to mount the sample.

[0010] Preferably, the first support assembly includes a plurality of first support members, and the plurality of first support members are arranged in parallel and at intervals between the outer side of the support body and the frame.

[0011] Preferably, the second support assembly comprises a plurality of second support members, and the plurality of second support members are arranged in parallel and at intervals between the two support bodies.

[0012] Preferably, the fixture base comprises: a bracket, which is used to support the hanging plate and is a truss structure; and a reinforcing rib group, which is installed on the bracket.

[0013] Preferably, the bracket includes a bottom frame, a support beam and a support frame, and the two ends of the support beam are respectively connected to the bottom frame and the support frame; the reinforcing rib group includes: a plurality of first reinforcing ribs, and the two ends of each of the first reinforcing ribs are respectively connected to the bottom frame and the support frame, and the plurality of first reinforcing ribs divide the side space of the bracket into a plurality of installation spaces; a plurality of second reinforcing ribs, and each of the second reinforcing ribs includes two cross-arranged reinforcing beams, and the plurality of second reinforcing ribs are installed in at least part of the installation space.

[0014] Preferably, the bracket also includes an extension beam arranged on an outer wall opposite to the bottom frame and located outside the bottom frame; the reinforcing rib group also includes an oblique brace, one end of the oblique brace is connected to the extension beam, and the other end is connected to the support frame.

[0015] Beneficial effects of the utility model:

[0016] The utility model provides a hanging fixture, including a fixture base and a hanging plate arranged on the fixture base, the hanging plate is used to install the sample, the structure of the hanging plate strengthens the fixture rigidity, improves the natural frequencies of each order of the fixture under the constraint state, and prevents the fixture from resonating and transmitting to the sample under the excitation of the vibration table, thereby improving the test amplitude-frequency curve. At the same time, the utility model ensures that the overall size of the fixture does not change too much, and the weight of the fixture does not increase significantly. While the fixture meets the corresponding modal requirements and the appropriate mass-rigidity ratio, it meets the installation requirements in occasions with strict installation dimensions and has certain economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a lifting fixture in one embodiment of the utility model;

[0018] Figure 2 It is a structural schematic diagram of a hanging plate in one embodiment of the utility model;

[0019] Figure 3 yes Figure 2 Another perspective of

[0020] Figure 4 It is a structural schematic diagram of a clamp base in one embodiment of the utility model;

[0021] Figure 5 It is the modal (1st order) simulation result of the lifting fixture in one embodiment of the utility model;

[0022] Figure 6 This is the modal (1st order) simulation result of a common lifting fixture.

[0023] In the figure:

[0024] 1. Lifting plate; 11. Frame; 12. Support body; 121. Main body; 122. Bridge-shaped part; 13. First support assembly; 131. First support member; 14. Second support assembly; 141. Second support member; 15. Connector; 16. Fixture mounting member; 17. Sample mounting member; 2. Fixture base; 21. Bracket; 211. Bottom frame; 212. Support beam; 213. Support frame; 214. Extension beam; 22. Reinforcement rib group; 221. First reinforcement rib; 222. Second reinforcement rib; 223. Diagonal brace. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0026] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0028] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0029] The utility model discloses a lifting fixture, such as Figure 1 As shown, it includes a fixture base 2 and a hanging plate 1 arranged on the fixture base 2. The fixture base 2 is arranged on the vibration test table for transmitting vibration, and the hanging plate 1 is used to install and fix the sample. Figure 2 As shown, the hanging plate 1 includes: a frame 11; a supporting body 12, wherein a plurality of supporting bodies 12 are arranged at intervals in the frame 11; a first supporting assembly 13, which is arranged outside the outermost supporting body 12 and fixedly connected to the supporting body 12 and the frame 11; and a second supporting assembly 14, which is arranged between adjacent supporting bodies 12 and fixedly connected to two adjacent supporting bodies 12. It can be understood that by arranging the supporting body 12 in a bridge shape and the supporting body 12 in conjunction with the first supporting assembly 13 and the second supporting assembly 14, the horizontal stiffness of the hanging plate 1 can be enhanced and the horizontal mode can be ensured, wherein the mode refers to the resonant frequency and vibration type of the hanging plate 1.

[0030] In some embodiments, the frame 11 is configured as a polygonal structure, and a plurality of square tubes are used to enclose the polygonal structure. In some specific embodiments, welding is used to form an octagonal structure to provide installation positions for other structures and specimens of the hanging plate 1, which has the advantages of simple structure and stable load-bearing capacity.

[0031] In some embodiments, Figure 2 As shown, the support body 12 includes a main body portion 121 and a bridge-shaped portion 122, the bridge-shaped portion 122 extends along a first direction, and the two ends of the main body portion 121 along the first direction are respectively fixedly connected to the inner side walls of the frame 11; the bridge-shaped portion 122 is arranged on one side of the main body portion 121 along the second direction, and has an arched protrusion protruding from the main body portion 121 along a third direction; wherein the first direction, the second direction and the third direction are perpendicular to each other; wherein: the second support assembly 14 is connected between two adjacent bridge-shaped portions 122. It can be understood that the combination of the main body portion 121 and the bridge-shaped portion 122 forms the support body 12, and the support body 12 is in the shape of a bridge as a whole, and the bridge shape is used as the supporting structural main body of the lifting plate 1, so that the structure is more solid and stable. As shown Figure 2 As shown, the second support assembly 14 is arranged between the frame 11 and the two support bodies 12 adjacent to the frame 11, and the second support assembly 14 is arranged between the bridge-shaped parts 122, specifically, the arched protruding part of the bridge-shaped part 122 relative to the main body 121, and the first support assembly 13 is arranged between the part of the bridge-shaped part 122 located at the main body 121 and the frame 11, which can better strengthen the horizontal stiffness of the hanging plate 1 and ensure the horizontal mode.

[0032] In some embodiments, the supporting body 12 is provided in two pieces, and the two bridge-shaped parts 122 are respectively provided on the sides of the two main body parts 121 away from each other along the second direction. It can be understood that the symmetrically arranged structure has good stability and load-bearing capacity.

[0033] In some embodiments, Figure 2 and Figure 3 As shown, a plurality of connectors 15 are arranged between the main body 121, and the connectors 15 and the first support assembly 13 are staggered along the first direction. It can be understood that the connectors 15 and the first support assembly 13 staggeredly support the main body 121, and the support of the main body 121 is more uniform and reliable, which can improve the structural rigidity of the supporting body 12. In other embodiments, the degree of structural rigidity to be improved can be determined according to the actual resonance frequency of the profile, so the connector and the first support assembly 13 can also be offset or one-to-one.

[0034] In some embodiments, Figure 3As shown, the hanging plate 1 also includes a fixture mounting member 16 and a sample mounting member 17. A plurality of fixture mounting members 16 are provided. The fixture mounting member 16 is provided at the bottom of the frame 11, and the fixture mounting member 16 can be connected to the fixture base 2; the sample mounting member 17 is provided on two adjacent support bodies 12, and the sample mounting member 17 is used to install the sample. In some specific embodiments, the fixture mounting member 16 is provided as a pad, and the sample mounting member 17 is provided as a long gasket, and the long gasket is provided between two adjacent support bodies 12. It can be understood that the sample is connected to the hanging plate 1 through the sample mounting member 17, which increases the contact surface between the sample and the hanging plate 1. By increasing the contact surface between the two, the overall mode can be improved, and the sample mounting member 17 is provided as a long gasket, which can further increase the contact surface between the sample and the hanging plate 1. In other embodiments, the sample mounting member 17 may also include a plurality of long gaskets and a plurality of gasket blocks at the same time. The long gaskets are arranged between adjacent support bodies 12, and the gasket blocks are arranged on the support bodies 12, or the corresponding quantity and position may be arranged according to actual needs such as the shape of the sample, so that the sample can be stably mounted on the hanging plate 1. No specific limitation is made here.

[0035] In some embodiments, the surface roughness of the matching surfaces of the fixture mounting member 16 and the fixture base 2, and the sample mounting member 17 and the sample is Ra6.3 to improve the matching stability. In other embodiments, different surface roughness can be selected according to actual needs, which is not specifically limited here.

[0036] In some embodiments, Figure 2 As shown, the first support assembly 13 includes a plurality of first support members 131, which are arranged in parallel and at intervals between the outer side of the support body 12 and the frame 11; the second support assembly 14 includes a plurality of second support members 141, which are arranged in parallel and at intervals between the two support bodies 12. It can be understood that the arrangement of the plurality of first support members 131 and the second support members 141 improves the bearing capacity of the structure on the one hand, and enhances the structural rigidity of the hanging plate 1 on the other hand.

[0037] In some embodiments, Figure 4 As shown, the fixture base 2 includes a bracket 21 and a reinforcement rib group 22. The fixture base 2 is made of square pipes welded together, wherein the bracket 21 is used to support the hanging plate 1, and the bracket 21 is a truss structure; the reinforcement rib group 22 is installed on the truss structure. It can be understood that the advantages of the truss structure are light weight, reasonable force, ability to withstand large loads, and can also be made into a larger span. The setting of the reinforcement rib group 22 can further improve the stability of the fixture base 2.

[0038] In some embodiments, the bracket 21 includes a bottom frame 211, a support beam 212 and a support frame 213, the support beam 212 is arranged along the third direction, and the two ends are respectively connected to the bottom frame 211 and the support frame 213; the reinforcing rib group 22 includes: a plurality of first reinforcing ribs 221, the two ends of each first reinforcing rib 221 are respectively connected to the bottom frame 211 and the support frame 213, and the plurality of first reinforcing ribs 221 divide the side space of the bracket 21 into a plurality of installation spaces; a plurality of second reinforcing ribs 222, each second reinforcing rib 222 includes two cross-arranged reinforcing beams, and the plurality of second reinforcing ribs 222 are installed in at least part of the installation space. It can be understood that the arrangement of the reinforcing rib group 22 enhances the strength and rigidity of the clamp base 2 without increasing the wall thickness of the clamp base 2, so as to save material usage, reduce weight, and reduce costs.

[0039] In some embodiments, the bracket 21 further includes an extension beam 214 disposed on an outer wall opposite to the bottom frame 211 and located outside the bottom frame 211; the reinforcing rib group 22 further includes an oblique brace 223, one end of the oblique brace 223 is connected to the extension beam 214, and the other end is connected to the support frame 213. It can be understood that the provision of the extension beam 214 and the oblique brace 223 can ensure a stable connection between the fixture base 2 and the vibration test bench, better transmit vibration, and ensure the accuracy of the test.

[0040] When the lifting fixture disclosed by the utility model is in use, first the fixture base 2 and the vibration test table are in a fixed connection state, then the lifting plate 1 and the sample are installed, and then the lifting plate 1 with the sample installed is lifted onto the fixture base 2 by a transfer device, such as a crane, and the lifting plate 1 and the fixture base 2 are installed and fixed, and the fixing method is bolt connection.

[0041] Figure 5 The modal (first order) simulation result of the lifting fixture in one embodiment of the utility model is shown in FIG. Figure 6 It is the modal (1st order) simulation result of the common lifting fixture. It can be seen that after adopting the structure of the lifting fixture provided by the utility model, the first-order resonance frequency is increased by more than 50Hz, so that there is no resonance frequency in the experimental frequency range (50-150Hz), which fully meets the test requirements.

[0042] The utility model hoisting fixture strengthens the fixture rigidity, improves the natural frequencies of each order of the fixture in a restrained state, and prevents the fixture from resonating and transmitting to the sample under the excitation of the vibration table, thereby improving the test amplitude-frequency curve.

[0043] At the same time, the utility model ensures that the overall size does not change too much, and the weight of the clamp does not increase significantly. While the clamp meets the corresponding modal requirements and the appropriate mass-rigidity ratio, it meets the installation requirements in occasions with strict installation dimensions and has a certain degree of economy.

[0044] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A lifting fixture, characterized in that: The invention comprises a fixture base (2) and a hanging plate (1) arranged on the fixture base (2), wherein the hanging plate (1) is used to install a sample, and the hanging plate (1) comprises: Frame (11); A supporting body (12), wherein a plurality of supporting bodies (12) are arranged at intervals in the frame (11); A first support assembly (13), arranged outside the outermost support body (12), and fixedly connected to the support body (12) and the frame (11); The second support assembly (14) is arranged between adjacent support bodies (12) and is fixedly connected to two adjacent support bodies (12).

2. The lifting fixture according to claim 1, characterized in that: The supporting body (12) comprises: A main body (121) is extended along a first direction, and two ends of the main body (121) along the first direction are respectively fixedly connected to the inner side wall of the frame (11); The bridge portion (122) is arranged on one side of the main body portion (121) along the second direction, and has an arched protrusion protruding from the main body portion (121) along the third direction; wherein the first direction, the second direction and the third direction are perpendicular to each other.

3. The lifting fixture according to claim 2, characterized in that: The supporting body (12) is provided in two pieces, and the two bridge-shaped portions (122) are respectively provided on one side of the two main body portions (121) facing away from each other along the second direction.

4. The lifting fixture according to claim 2, characterized in that: A plurality of connecting members (15) are arranged between the main body parts (121), and the connecting members (15) and the first supporting components (13) are arranged alternately along a first direction.

5. The lifting fixture according to claim 1, characterized in that: The hanging plate (1) further comprises: A clamp mounting member (16), wherein the clamp mounting member (16) is arranged on the frame (11), a plurality of the clamp mounting members (16) are provided, and the clamp mounting members (16) can be connected to the clamp base (2); The sample mounting member (17) is arranged on two adjacent support bodies (12), and a plurality of the sample mounting members (17) are provided for mounting the sample.

6. The lifting fixture according to claim 1, characterized in that: The first support assembly (13) comprises a plurality of first support members (131), and the plurality of first support members (131) are arranged in parallel and at intervals between the outer side of the support body (12) and the frame (11).

7. The lifting fixture according to claim 1, characterized in that: The second support assembly (14) comprises a plurality of second support members (141), and the plurality of second support members (141) are arranged in parallel and at intervals between the two support bodies (12).

8. The lifting fixture according to any one of claims 1 to 7, characterized in that: The fixture base (2) comprises: A bracket (21), the bracket (21) is used to support the hanging plate (1), and the bracket (21) is a truss structure; A reinforcing rib group (22), wherein the reinforcing rib group (22) is mounted on the bracket (21).

9. The lifting fixture according to claim 8, characterized in that: The support (21) comprises a bottom frame (211), a support beam (212) and a support frame (213), and two ends of the support beam (212) are respectively connected to the bottom frame (211) and the support frame (213); The reinforcing rib group (22) comprises: a plurality of first reinforcing ribs (221), wherein two ends of each of the first reinforcing ribs (221) are respectively connected to the bottom frame (211) and the support frame (213), and the plurality of first reinforcing ribs (221) divide the side space of the bracket (21) into a plurality of installation spaces; A plurality of second reinforcing ribs (222), each of the second reinforcing ribs (222) comprising two cross-arranged reinforcing beams, and the plurality of second reinforcing ribs (222) are installed in at least a portion of the installation space.

10. The lifting fixture according to claim 9, characterized in that: The bracket (21) further comprises an extension beam (214) arranged on an outer wall opposite to the bottom frame (211) and located outside the bottom frame (211); the reinforcing rib group (22) further comprises an oblique brace (223), one end of the oblique brace (223) is connected to the extension beam (214), and the other end is connected to the support frame (213).

Images