Quick mounting structure of electric single-beam limit switch of crane

Abstract

The invention relates to the technical field of crane equipment, and discloses a quick mounting structure for a limit switch of an electric single beam of a crane, which comprises a switch mounting plate for mounting the limit switch, a ventilation type mounting mechanism and a buffer type clamping and fixing mechanism. The quick mounting structure for the electric single-beam limit switch of the crane can be fixedly mounted on the surface of a beam body of a single beam in a clamping manner without damaging the surface structure of the single beam, the mounting position of the quick mounting structure can be autonomously adjusted according to actual needs, the quick mounting structure has the characteristic of wide mounting range, and in addition, the quick mounting structure can be fixed on the surface of the beam body in a buffering manner and is convenient to mount. The displacement phenomenon caused by mechanical vibration in the working process of a single beam is reduced, and the stability of equipment during working is improved.

Description

Technical Field

[0001] The invention relates to the technical field of crane equipment, in particular to a quick installation structure of an electric single-beam limit switch of a crane. Background Art

[0002] The electric single beam of the crane is controlled to run on the crane track. The electric single beam of the crane includes a crossbeam and end beams provided at both ends of the crossbeam. A limit switch will be installed at the end of the end beam. The function of the limit switch is to prevent the front and rear electric single beams from colliding during operation, and to prevent the electric single beam of the crane from colliding with the stop device at the end of the track. At present, the limit switch is installed on the end beam of the crane electric single beam by welding. Welding on the end beam will damage the paint on the surface of the end beam, and it will need to be repainted later. However, the repainted area and the unpainted area on the end beam will appear in different shades of color, affecting the overall aesthetics of the single beam. In addition, after the electric single beam is installed on the crane, the limit switch needs to be welded a second time to reinforce the installation of the limit switch. Therefore, the installer needs to weld at high altitude, which greatly increases the difficulty of welding. At the same time, high-altitude operations are also dangerous.

[0003] To this end, the Chinese patent with publication number "CN204265285U" discloses the "Installation Structure of Limit Switch on Electric Single Beam of Crane", whose main structure includes the end beam and limit switch of the electric single beam of the crane, and the installation structure also includes a limit frame, which includes a fixed plate and a mounting plate. The fixed plate and the mounting plate are connected to each other to form an "L" shape, and the limit switch is installed on the mounting plate. The fixed plate is provided with a longitudinal waist-shaped hole, and the fixed plate is installed on the end beam by bolts. The installation structure of the limit switch on the electric single beam of the crane is achieved by setting a limit frame so that the limit switch is installed on the limit frame mounting plate, and the limit frame fixing plate is installed on the end beam through the longitudinal waist-shaped hole and bolts.

[0004] It is obvious that the installation structure of the limit switch on the electric single beam of the above-mentioned crane is to first install the limit switch on the limit frame mounting plate, and then install the limit frame mounting plate on the end beam through the longitudinal waist hole and bolts. It still needs to punch holes on the surface of the end beam. Therefore, it still needs to destroy the structure of the end beam. At the same time, the installation height and position will be limited by the punching position of the end beam, resulting in its installation position being relatively restricted. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention provides a quick installation structure for an electric single-beam limit switch of a crane, which can be fixedly installed on the surface of the single beam in a clamping manner without destroying the surface structure of the single beam. Moreover, its installation position can be independently adjusted according to actual needs, and has the characteristics of a wide installation range. In addition, the device can be fixed on the surface of the beam in a buffering form to reduce the occurrence of displacement of the single beam due to mechanical vibration during operation, thereby improving the stability of the equipment during operation, and solving the above-mentioned technical problems.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a rapid installation structure for an electric single-beam limit switch of a crane, comprising a switch mounting plate on which the limit switch is mounted, and a ventilation-type mounting mechanism, the interior of which is provided with a front contact plate fixedly connected to the switch mounting plate, a buffer pad mounted on the back of the front contact plate and playing a buffering role, and a semi-cylindrical mounting groove with an inwardly concave structure arranged on the back of the front contact plate; and a buffer-type clamping and fixing mechanism, the interior of which is provided with a horizontal shell fixedly mounted inside the semi-cylindrical mounting groove and having a hollow structure, two built-in moving disks mounted inside the horizontal shell and capable of horizontal movement, a No. 1 threaded moving block and a No. 2 threaded moving block that exert a directional driving force on the built-in moving disk, a No. 1 threaded rod and a No. 2 threaded rod that can cause the No. 1 threaded moving block and the No. 2 threaded moving block to move in a directional manner during rotation, and a No. 1 coil spring that produces an elastic force on the built-in moving disk.

[0007] Preferably, the ventilation type mounting mechanism includes an axial connecting rod installed at the four corners of the front side of the front contact plate, and each end of the axial connecting rod is provided with a connecting plate structure fixedly connected to the switch mounting plate, and a raised embedded ring is provided at each of the four corners of the back side of the front contact plate, and a buffer pad is embedded at one end of each raised embedded ring, and an arc-shaped plate structure protruding toward the front side of the front contact plate is provided in the middle part of the front contact plate, and a semi-cylindrical mounting groove with open ends and one side is provided inside the arc-shaped plate structure.

[0008] Preferably, one end surface of the buffer pad protrudes outward relative to the embedded end of the raised embedded ring.

[0009] Preferably, the buffer-type clamping and fixing mechanism includes a horizontal component movable cavity arranged inside the horizontal shell, and the horizontal shell is respectively provided with a No. 1 shaft body mounting hole at both ends of the horizontal component movable cavity, and one side of the horizontal shell is provided with a strip-shaped slide groove in a horizontal state and connected to the external space and one side of the horizontal component movable cavity, and the horizontal shell is respectively installed with a No. 1 threaded rod and a No. 2 threaded rod that can rotate through bearings inside the two No. 1 shaft body mounting holes, and a middle limit plate is fixedly installed at the opposite ends of the No. 1 threaded rod and the No. 2 threaded rod, and the No. 1 threaded rod is provided with a No. 1 linkage shaft with an integral structure therewith at one end of the No. 1 threaded rod located outside the horizontal shell, and the centers of the two built-in movable plates are both provided with a No. 1 threaded rod and a No. 2 threaded rod that can slide along the periphery of the rod body. The sliding hole, each of the built-in movable disks is fixedly installed with a horizontal sliding rod that can slide horizontally along the strip sliding groove on the end face facing the strip sliding groove, and the two horizontal sliding rods are respectively fixedly installed with a resistance clamping head on the opposite end faces. The center of the No. 1 threaded moving block is provided with a No. 1 internal threaded hole that is installed on the No. 1 threaded rod body through the No. 1 threaded structure, and the center of the No. 2 threaded moving block is provided with a No. 2 internal threaded hole that is installed on the No. 2 threaded rod body through the No. 2 threaded structure. A No. 1 coil spring in a compressed state is installed between the No. 1 threaded moving block and the corresponding built-in movable disk, and a No. 1 coil spring in a compressed state is installed between the No. 2 threaded moving block and the corresponding built-in movable disk, and the spiral direction of the No. 1 threaded structure is opposite to the spiral direction of the No. 2 threaded structure.

[0010] Preferably, the No. 1 thread structure includes an external thread structure provided on the inner wall of the No. 1 internal thread hole and an external thread structure provided on the No. 1 thread rod body, and the internal thread structure matches the external thread structure.

[0011] Preferably, the No. 2 thread structure includes an external thread structure provided on the inner wall of the No. 2 internal thread hole and an external thread structure provided on the No. 2 thread rod body, and the internal thread structure matches the external thread structure.

[0012] Preferably, the structural shape of the outer peripheral surface of the No. 1 thread moving block, the structural shape of the outer peripheral surface of the No. 2 thread moving block and the structural shape of the cross section of the horizontal component movable cavity are consistent and are all polygonal structures.

[0013] Preferably, it also includes a pressure-controlled screwing mechanism, which is internally provided with a rotatable hollow disk, an inner rotating column that can drive the No. 1 linkage shaft to rotate, and an arc-shaped contact plate that can link the hollow disk and the inner rotating column by friction.

[0014] Preferably, the pressure-controlled screwing mechanism includes a hollow disk body and an inner rotating column, one end face of the hollow disk body is provided with a hexagonal rotating cap, the center of the hollow disk body is provided with a cylindrical component mounting cavity, the center of the other end of the hollow disk body is provided with a No. 2 shaft body mounting hole, the interior of the No. 2 shaft body mounting hole is provided with a rotatable No. 2 linkage shaft through a bearing, one end face of the No. 2 linkage shaft is provided with a No. 1 shaft body fixing groove for fixing the No. 1 linkage shaft, the center of the cylindrical component mounting cavity is provided with an inner rotating column, and the hollow disk body is located in the cylindrical component mounting cavity. A plurality of longitudinal component movable cavities in annular arrays are arranged on the periphery, and the longitudinal component movable cavities and the circumferential side surfaces of the cylindrical component mounting cavity are connected through the shaft body through-holes, and the hollow disk body is provided with an inner movable plate capable of axially moving along the cylindrical component mounting cavity inside the cylindrical component mounting cavity, and a No. 2 coil spring is provided at one end of the inner movable plate, and a connecting shaft body passing through the shaft body through-hole is fixedly installed at the other end of the inner movable plate, and an arc-shaped resistance plate that abuts against the circumferential surface of the inner rotating cylinder is fixedly installed at one end of the connecting shaft body located inside the cylindrical component mounting cavity.

[0015] Preferably, one end of the No. 2 coil spring abuts against one end surface of the inner movable plate, and the other end abuts against one end surface of the movable cavity of the longitudinal component, and the No. 2 coil spring is in a compressed state.

[0016] Compared with the prior art, the present invention provides a quick installation structure for a crane electric single-beam limit switch, which has the following beneficial effects:

[0017] It can be fixedly installed on the surface of a single beam in a clamping manner without destroying the surface structure of the single beam. Moreover, its installation position can be independently adjusted according to actual needs, and it has the characteristics of a wide installation range. In addition, the device can be fixed on the surface of the beam in a buffering form to reduce the displacement of the single beam due to mechanical vibration during operation, so as to improve the stability of the equipment during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A perspective view of the present invention;

[0019] Figure 2 is a three-dimensional cross-sectional view of the present invention;

[0020] Figure 3 A perspective view of the ventilation mounting mechanism of the present invention;

[0021] Figure 4 is a three-dimensional cross-sectional view of the ventilation mounting mechanism of the present invention;

[0022] Figure 5 A three-dimensional diagram of the buffer-type clamping and fixing mechanism of the present invention;

[0023] Figure 6 It is a three-dimensional cross-sectional view of the buffer type clamping and fixing mechanism of the present invention;

[0024] Figure 7 It is a three-dimensional cross-sectional view of the pressure-controlled screwing mechanism of the present invention at a first viewing angle;

[0025] Figure 8 It is a three-dimensional cross-sectional view of the pressure-controlled screwing mechanism of the present invention at a second viewing angle.

[0026] Among them: 1. Limit switch; 2. Switch mounting plate; 3. Ventilation mounting mechanism; 31. Front contact plate; 32. Semi-cylindrical mounting groove; 33. Axial connecting rod; 34. Connecting plate structure; 35. Raised embedded ring; 36. Buffer pad; 37. Arc-shaped plate structure; 4. Buffer clamping and fixing mechanism; 41. Horizontal shell; 42. Horizontal component movable cavity; 43. No. 1 shaft mounting hole; 44. Strip slide; 45. No. 1 threaded rod; 46. No. 2 threaded rod; 47. No. 1 linkage shaft; 48. Middle limit plate; 49. Horizontal slide; 410. Built-in movable plate; 411 , sliding hole; 412, threaded moving block No. 1; 413, threaded moving block No. 2; 414, internal threaded hole No. 1; 415, internal threaded hole No. 2; 416, coil spring No. 1; 417, interference clamping head; 5, pressure-controlled screwing mechanism; 51, hollow disk; 52, hexagonal rotating cap; 53, cylindrical component mounting cavity; 54, No. 2 shaft mounting hole; 55, longitudinal component movable cavity; 56, shaft through hole; 57, inner movable plate; 58, No. 2 coil spring; 59, arc-shaped interference plate; 510, inner rotating column; 511, No. 1 shaft fixing groove; 512, No. 2 linkage shaft. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] See also Figure 1 and Figure 2 A quick installation structure of an electric single-beam limit switch for a crane includes a switch mounting plate 2 on which a limit switch 1 is mounted.

[0029] To install and fix the limit switch 1, please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4, it is necessary to set up a ventilation mounting mechanism 3, which is internally provided with a front contact plate 31 fixedly connected to the switch mounting plate 2, a buffer pad 36 installed on the back of the front contact plate 31 and playing a buffering role, and a semi-cylindrical mounting groove 32 with an inward concave structure provided on the back of the front contact plate 31. The switch mounting plate 2 is fixed to the end of the connecting plate structure 34 by bolts. Due to the structural shape of the front contact plate 31, the gas can flow smoothly, thereby reducing the temperature on the surface of the limit switch 1. At the same time, the buffer pad 36 contacts the surface of the single beam after installation, and the buffer pad 36 has a buffering effect, thereby reducing the negative impact of mechanical vibration on the limit switch 1.

[0030] For the specific structure of the ventilation installation mechanism 3, please refer to Figure 3 and Figure 4 , including axial connecting rods 33 installed at the four corners of the front face of the front contact plate 31, each end of the axial connecting rod 33 is provided with a connecting plate structure 34 fixedly connected to the switch mounting plate 2, and a raised embedded ring 35 is provided at each of the four corners of the back face of the front contact plate 31, and a buffer pad 36 is embedded at one end of each raised embedded ring 35. The middle part of the front contact plate 31 is provided with an arc-shaped plate structure 37 that protrudes toward the front face of the front contact plate 31, and the interior of the arc-shaped plate structure 37 is provided with a semi-cylindrical mounting groove 32 with two ends and one side being open, and one end surface of the buffer pad 36 protrudes outward relative to the embedded end of the raised embedded ring 35.

[0031] For clamp-on mounting, see Figure 1 、 Figure 2 、 Figure 5 and Figure 6, it is necessary to set up a buffer type clamping and fixing mechanism 4, which is provided with a horizontal shell 41 fixedly installed in the semi-cylindrical mounting groove 32 and having a hollow structure inside, two built-in moving disks 410 installed in the horizontal shell 41 and capable of horizontal movement, a No. 1 threaded moving block 412 and a No. 2 threaded moving block 413 that play a directional driving role on the built-in moving disk 410, a No. 1 threaded rod 45 and a No. 2 threaded rod 46 that can make the No. 1 threaded moving block 412 and the No. 2 threaded moving block 413 move in a directional manner during the rotation process, and a No. 1 coil spring 416 that generates an elastic force on the built-in moving disk 410. When the No. 1 linkage shaft 47 rotates in a directional manner, it will drive the No. 1 threaded rod 45 and the No. 2 threaded rod 46 to rotate at the same time. Due to the structural shape of the outer circumference of the No. 1 threaded moving block 412 and the outer circumference of the No. 2 threaded moving block 413, The structural shape of the circumference is consistent with the structural shape of the cross-section of the horizontal component movable cavity 42, and both are polygonal structures. Under the joint action of the No. 1 thread structure and the No. 2 thread structure, the No. 1 thread moving block 412 and the No. 2 thread moving block 413 will squeeze the two No. 1 coil springs 416, and the No. 1 coil spring 416 will cause the built-in moving disk 410 to produce a synchronous and reverse movement trend, thereby driving the two interference clamping heads 417 to move, so that the two interference clamping heads 417 are aligned with the two sides of the single beam. After further movement, the interference clamping heads 417 will interfere with the beam surface of the single beam until the device is clamped on both sides of the single beam. During operation, the elasticity of the No. 1 coil spring 416 can produce a pre-tightening effect on the No. 1 thread structure and the No. 2 thread structure, thereby reducing the negative impact of mechanical vibration on the equipment.

[0032] For the specific structure of the buffer type clamping and fixing mechanism 4, please refer to Figure 5 and Figure 6, including a horizontal component movable cavity 42 arranged inside a horizontal shell 41, the horizontal shell 41 is respectively provided with a No. 1 shaft body mounting hole 43 at both ends of the horizontal component movable cavity 42, and a strip-shaped slide groove 44 is provided on one side of the horizontal shell 41 in a horizontal state and connecting the external space and one side of the horizontal component movable cavity 42. The horizontal shell 41 is respectively provided with a No. 1 threaded rod 45 and a No. 2 threaded rod 46 that can rotate through bearings inside the two No. 1 shaft body mounting holes 43. A middle limit plate 48 is fixedly installed at the opposite ends of the No. 1 threaded rod 45 and the No. 2 threaded rod 46. The No. 1 threaded rod 45 is provided with a No. 1 linkage shaft 47 with an integral structure therewith at one end located outside the horizontal shell 41. The centers of the two built-in movable disks 410 are provided with sliding holes 411 that can slide along the periphery of the No. 1 threaded rod 45 and the No. 2 threaded rod 46. Each of the built-in movable disks 410 is fixedly installed with a horizontal slide rod 49 that can slide horizontally along the strip slide groove 44 on the end face facing the strip slide groove 44. The two horizontal slide rods 49 are respectively fixed with an abutment clamping head 417 on the opposite end faces. The center of the No. 1 threaded movable block 412 is provided with a No. 1 threaded joint. The first internal threaded hole 414 is installed on the rod body of the first threaded rod 45, and the center of the second threaded moving block 413 is provided with a second internal threaded hole 415 installed on the rod body of the second threaded rod 46 through the second threaded structure. A first coil spring 416 in a compressed state is installed between the first threaded moving block 412 and the corresponding built-in moving disk 410, and a first coil spring 416 in a compressed state is installed between the second threaded moving block 413 and the corresponding built-in moving disk 410. The spiral direction of the first thread structure is opposite to the spiral direction of the second thread structure. The first thread structure It includes an external thread structure arranged at the inner wall of the circumference of the No. 1 internal thread hole 414 and an external thread structure arranged on the rod body of the No. 1 threaded rod 45, and the internal thread structure matches the external thread structure. The No. 2 thread structure includes an external thread structure arranged at the inner wall of the circumference of the No. 2 internal thread hole 415 and an external thread structure arranged on the rod body of the No. 2 threaded rod 46, and the internal thread structure matches the external thread structure. The structural shape of the outer peripheral surface of the No. 1 threaded moving block 412, the structural shape of the outer peripheral surface of the No. 2 threaded moving block 413 and the structural shape of the cross section of the horizontal component movable cavity 42 are consistent and are all polygonal structures.

[0033] In order to ensure that the clamping strength can reach the predetermined value each time, please refer to Figure 1 、 Figure 2 、 Figure 7 and Figure 8, it is necessary to set up a pressure-controlled screwing mechanism 5, which is provided with a hollow disk body 51 that can rotate, an inner rotating column 510 that can drive the No. 1 linkage shaft 47 to rotate, and an arc-shaped contact plate 59 that relies on friction to enable the hollow disk body 51 and the inner rotating column 510 to link. Use a wrench to rotate the hexagonal rotating cap 52. At this time, the hollow disk body 51 and the inner rotating column 510 will drive the No. 1 linkage shaft 47 to rotate. When the interference clamping head 417 is clamped on both sides of the single beam, the torsional resistance of the equipment will increase. When the resistance is greater than the maximum static friction force formed by the No. 2 coil spring 58, it will cause the inner rotating column 510 and the arc-shaped contact plate 59 to rotate relative to each other, which indicates that the clamping force of the interference clamping head 417 on the single beam meets the predetermined requirements to prevent the occurrence of insufficient or excessive clamping force.

[0034] For the specific structure of the pressure-controlled screwing mechanism 5, please refer to Figure 7 and Figure 8 , including a hollow disk body 51 and an inner rotating column 510, one end face of the hollow disk body 51 is provided with a hexagonal rotating cap 52, the center of the hollow disk body 51 is provided with a cylindrical component mounting cavity 53, the other end center of the hollow disk body 51 is provided with a No. 2 shaft mounting hole 54, the interior of the No. 2 shaft mounting hole 54 is rotatably mounted with a No. 2 linkage shaft 512 through a bearing, one end face of the No. 2 linkage shaft 512 is provided with a No. 1 shaft fixing groove 511 for fixing the No. 1 linkage shaft 47, the center of the cylindrical component mounting cavity 53 is provided with an inner rotating column 510, the hollow disk body 51 is provided with a plurality of annular array-type longitudinal component active cavities 55 on the periphery of the cylindrical component mounting cavity 53, the longitudinal component active cavity 55 and the cylindrical The circumferential side surfaces of the component mounting cavity 53 are connected through the shaft through-hole 56, and the hollow disk body 51 is provided with an inner movable plate 57 capable of axially moving along the cylindrical component mounting cavity 53 inside the cylindrical component mounting cavity 53, and a No. 2 coil spring 58 is provided at one end of the inner movable plate 57, and a connecting shaft passing through the shaft through-hole 56 is fixedly installed at the other end of the inner movable plate 57, and an arc-shaped contact plate 59 that abuts against the circumferential surface of the inner rotating column 510 is fixedly installed at one end of the connecting shaft located inside the cylindrical component mounting cavity 53, one end of the No. 2 coil spring 58 abuts against one end face of the inner movable plate 57, and the other end abuts against one end face of the longitudinal component movable cavity 55, and the No. 2 coil spring 58 is in a compressed state.

[0035] When in use, use a wrench to rotate the hexagonal rotating cap 52. At this time, the hollow disk body 51 and the inner rotating column 510 will drive the No. 1 linkage shaft 47 to rotate. When the No. 1 linkage shaft 47 rotates in a certain direction, it will simultaneously drive the No. 1 threaded rod 45 and the No. 2 threaded rod 46 to rotate. Since the structural shape of the outer circumference of the No. 1 threaded moving block 412, the structural shape of the outer circumference of the No. 2 threaded moving block 413 and the structural shape of the cross section of the horizontal component movable cavity 42 are consistent, they are all polygonal structures, and the No. 1 thread structure and the No. 2 thread structure are consistent. Under the joint action of the threaded structure, the No. 1 threaded moving block 412 and the No. 2 threaded moving block 413 will squeeze the two No. 1 coil springs 416, and the No. 1 coil spring 416 will cause the built-in moving disk 410 to produce a synchronous and reverse movement trend, thereby driving the two interference clamping heads 417 to move, so that the two interference clamping heads 417 are aligned with the two sides of the single beam. After further movement, the interference clamping heads 417 will interfere with the surface of the beam body of the single beam until the device is clamped on both sides of the single beam.

[0036] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A quick installation structure for an electric single-beam limit switch of a crane, comprising a switch mounting plate (2) on which a limit switch (1) is mounted, characterized in that: Also includes, A ventilated mounting mechanism (3) is provided inside thereof with a front contact plate (31) fixedly connected to the switch mounting plate (2), a buffer pad (36) installed on the back of the front contact plate (31) and having a buffering effect, and a semi-cylindrical mounting groove (32) provided on the back of the front contact plate (31) and having an inner concave structure; A buffer-type clamping and fixing mechanism (4) is provided therein, wherein a horizontal shell (41) is fixedly mounted inside a semi-cylindrical mounting groove (32) and has a hollow structure inside, two built-in movable disks (410) are mounted inside the horizontal shell (41) and can move horizontally, a No. 1 threaded movable block (412) and a No. 2 threaded movable block (413) that exert a directional driving force on the built-in movable disks (410), a No. 1 threaded rod (45) and a No. 2 threaded rod (46) that can cause the No. 1 threaded movable block (412) and the No. 2 threaded movable block (413) to move in a directional manner during rotation, and a No. 1 coil spring (416) that generates an elastic force on the built-in movable disks (410).

2. The quick installation structure of the electric single-beam limit switch for a crane according to claim 1, characterized in that: The ventilation mounting mechanism (3) comprises an axial connecting rod (33) mounted at the four corners of the front face of the front contact plate (31), the end of each axial connecting rod (33) being provided with a connecting plate structure (34) fixedly connected to the switch mounting plate (2), a raised embedded ring (35) being provided at each of the four corners of the back face of the front contact plate (31), a buffer pad (36) being embedded at one end of each raised embedded ring (35), an arc-shaped plate structure (37) being provided in the middle of the front contact plate (31) and being raised toward the front face of the front contact plate (31), and a semi-cylindrical mounting groove (32) being open at both ends and one side being provided inside the arc-shaped plate structure (37).

3. The quick installation structure of the electric single-beam limit switch for a crane according to claim 2, characterized in that: One end surface of the buffer pad (36) protrudes outward relative to the embedded end of the raised embedded ring (35).

4. The quick installation structure of the electric single-beam limit switch for a crane according to claim 3, characterized in that: The buffer type clamping and fixing mechanism (4) includes a horizontal component movable cavity (42) arranged inside a horizontal shell (41), the horizontal shell (41) is provided with a No. 1 shaft body mounting hole (43) at both ends of the horizontal component movable cavity (42), and one side of the horizontal shell (41) is provided with a horizontal strip-shaped slide groove (44) that is connected to the outside space and one side of the horizontal component movable cavity (42), and the horizontal shell (41) is provided with a shaft through the inside of the two No. 1 shaft body mounting holes (43). A No. 1 threaded rod (45) and a No. 2 threaded rod (46) are mounted on the bearing and can rotate. A middle limit plate (48) is fixedly mounted on the opposite ends of the No. 1 threaded rod (45) and the No. 2 threaded rod (46). The No. 1 threaded rod (45) is provided with a No. 1 linkage shaft (47) of an integral structure with the No. 1 threaded rod (45) at one end located outside the horizontal shell (41). The centers of the two built-in movable plates (410) are both provided with sliding holes (48) that can slide along the outer periphery of the No. 1 threaded rod (45) and the No. 2 threaded rod (46). 411), each of the built-in moving disks (410) is fixedly installed with a horizontal slide rod (49) capable of sliding horizontally along the strip slide groove (44) on the end surface facing the strip slide groove (44), and two of the horizontal slide rods (49) are fixedly installed with a contact clamping head (417) on the opposite end surfaces, and the center of the No. 1 threaded moving block (412) is provided with a No. 1 internal threaded hole (414) installed on the rod body of the No. 1 threaded rod (45) through a No. 1 threaded structure, and the No. 2 threaded moving block (413) A No. 2 internal threaded hole (415) is provided at the center of the No. 1 threaded rod (46) through a No. 2 threaded structure, a No. 1 coil spring (416) in a compressed state is installed between the No. 1 threaded moving block (412) and the corresponding built-in moving disk (410), and a No. 1 coil spring (416) in a compressed state is installed between the No. 2 threaded moving block (413) and the corresponding built-in moving disk (410), and the spiral direction of the No. 1 threaded structure is opposite to the spiral direction of the No. 2 threaded structure.

5. The quick installation structure of the electric single-beam limit switch for a crane according to claim 4, characterized in that: The No. 1 thread structure comprises an external thread structure provided on the inner circumferential wall of the No. 1 internal thread hole (414) and an external thread structure provided on the rod body of the No. 1 thread rod (45), and the internal thread structure matches the external thread structure.

6. The quick installation structure of the electric single-beam limit switch for a crane according to claim 5, characterized in that: The second thread structure comprises an external thread structure provided on the inner circumferential wall of the second internal thread hole (415) and an external thread structure provided on the rod body of the second thread rod (46), and the internal thread structure matches the external thread structure.

7. The quick installation structure of the electric single-beam limit switch for a crane according to claim 6, characterized in that: The structural shape of the outer peripheral surface of the No. 1 thread moving block (412), the structural shape of the outer peripheral surface of the No. 2 thread moving block (413), and the structural shape of the cross section of the horizontal component movable cavity (42) are consistent and all have a polygonal structure.

8. A quick installation structure for an electric single-beam limit switch for a crane according to any one of claims 4 to 7, characterized in that: The invention also includes a pressure-controlled screwing mechanism (5), which is provided with a rotatable hollow disc (51), an inner rotating column (510) capable of driving the first linkage shaft (47) to rotate, and an arc-shaped contact plate (59) capable of linking the hollow disc (51) and the inner rotating column (510) by means of friction.

9. The quick installation structure of the electric single-beam limit switch for a crane according to claim 8, characterized in that: The pressure-controlled screwing mechanism (5) comprises a hollow disk (51) and an inner rotating column (510), one end surface of the hollow disk (51) is provided with a hexagonal rotating cap (52), the center of the hollow disk (51) is provided with a columnar component mounting cavity (53), the other end center of the hollow disk (51) is provided with a No. 2 shaft mounting hole (54), the interior of the No. 2 shaft mounting hole (54) is provided with a No. 2 linkage shaft (512) that can rotate through a bearing, one end surface of the No. 2 linkage shaft (512) is provided with a No. 1 shaft fixing groove (511) for fixing and installing a No. 1 linkage shaft (47), the center of the columnar component mounting cavity (53) is provided with an inner rotating column (510), the hollow disk (51) is located in the columnar component mounting cavity A plurality of longitudinal component movable cavities (55) in an annular array are provided on the periphery of (53), and the longitudinal component movable cavities (55) and the circumferential side surfaces of the cylindrical component mounting cavity (53) are communicated with each other through the shaft body through-hole (56), and the hollow disk body (51) is provided with an inner movable plate (57) capable of axially moving along the cylindrical component mounting cavity (53) inside the cylindrical component mounting cavity (53), and a No. 2 coil spring (58) is provided at one end of the inner movable plate (57), and a connecting shaft body penetrating the shaft body through-hole (56) is fixedly installed at the other end of the inner movable plate (57), and an arc-shaped contact plate (59) that contacts the circumferential surface of the inner rotating column (510) is fixedly installed at one end of the connecting shaft body located inside the cylindrical component mounting cavity (53).

10. The quick installation structure of the electric single-beam limit switch for a crane according to claim 9, characterized in that: One end of the No. 2 coil spring (58) abuts against one end surface of the inner movable plate (57), and the other end abuts against one end surface of the longitudinal component movable cavity (55), and the No. 2 coil spring (58) is in a compressed state.

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