Protective structure of crane travel switch

Abstract

The utility model relates to the technical field of travel switches, and discloses a protective structure of a crane travel switch. The protection structure of the crane travel switch comprises a protection shell, a sliding rod, a flow guide block, a universal ball, a limiting frame body, a first contact piece, a second contact piece, an electric wire and an adapter shell, the sliding rod is arranged on the front side of the protection shell in a sliding mode, the flow guide block is fixedly connected to the sliding rod, the universal ball is arranged at the front end of the sliding rod, and the limiting frame body is fixedly connected to the universal ball. A limiting frame is fixedly connected into the protective shell, two first contact pieces are arranged on the inner side of the limiting frame, two second contact pieces are arranged on the inner side of the limiting frame, each first contact piece and each second contact piece are connected with an electric wire, and an adapter shell is arranged at one end of each electric wire. And when the sliding rod stops moving, the first elastic piece recovers to drive the pushing rod to move forwards, so that impact force generated by extrusion of the arm frame is buffered, and the travel switch is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of travel switches and discloses a protective structure of a crane travel switch. Background Art

[0002] A travel switch, also called a position switch or limit switch, is a commonly used low-current master electrical appliance. Its main function is to use the collision of the moving parts of the production machinery to move the contacts, thereby connecting or disconnecting the control circuit to achieve the purpose of controlling the position or stroke of the mechanical movement. Travel switches are widely used in various machine tools and lifting machinery to control the stroke and perform terminal limit protection to ensure that the mechanical movement automatically stops, reverses, changes speed, or automatically reciprocates according to the predetermined position or stroke.

[0003] The patent with the patent authorization publication number CN218619932U discloses a crane travel switch, which includes a bottom shell, and the outer wall of which is provided with an anti-corrosion protective paint layer. Although the above patent divides the overall structure into a bottom shell and a top shell, and installs a connecting seat that matches the size of the bottom shell at the bottom of the top shell, so as to facilitate installation or disassembly. However, in actual use, when the crane boom squeezes the camshaft to rotate it to realize the power-off function, the impact force generated may be too large, which not only acts on the camshaft, but also affects the entire travel switch, thereby causing damage to the travel switch.

[0004] Therefore, a protective structure for a crane travel switch is needed. Utility Model Content

[0005] In order to overcome the disadvantage of the existing patent that when the crane boom squeezes the camshaft to rotate it to achieve the power-off function, the impact force generated may be too large, the impact force not only acts on the camshaft, but also affects the entire travel switch, thereby causing damage to the travel switch, the utility model provides a protective structure for the crane travel switch.

[0006] The utility model provides the following technical solutions: a protective structure of a crane travel switch, comprising a protective shell, a sliding rod, a guide block, a universal ball, a limit frame, a first contact piece, a second contact piece, an electric wire and an adapter shell, a sliding rod is slidably arranged on the front side of the protective shell, the guide block is fixedly connected to the sliding rod, a universal ball is arranged at the front end of the sliding rod, the protective shell is fixedly connected to the limit frame, two first contact pieces are arranged on the inner side of the limit frame, two second contact pieces are arranged on the inner side of the limit frame, each of the first contact piece and the second contact piece is connected to an electric wire, an adapter shell is arranged on one end of the electric wire, and also comprises a push rod, a guide sleeve and a first elastic member, a guide sleeve is arranged inside the protective shell, a push rod is slidably arranged on the guide sleeve, the sliding rod is in contact with the push rod, and the first elastic member is connected between the push rod and the guide sleeve.

[0007] Further explanation: It also includes a dust cover, a second elastic member, and a C-shaped clamping plate. A dust cover is fixedly connected to the rear side of the protective housing. Two C-shaped clamping plates are slidably arranged inside the protective housing, and a second elastic member is connected between the C-shaped clamping plate and the protective housing.

[0008] Further explanation: It also includes a mounting bracket, a bidirectional screw, a handwheel, and an L-shaped clamping plate. A mounting bracket is installed at the bottom of the protective housing. Bidirectional screws are rotatably arranged on both the left and right sides of the mounting bracket. A handwheel is fixedly connected to the rear end of the bidirectional screw. L-shaped clamping plates are threadedly arranged at both the front and rear ends of the bidirectional screw, and the L-shaped clamping plates slide on the mounting bracket.

[0009] Further explanation: It also includes a protective cover. Protective covers are covered on both the left and right sides of the mounting bracket, and the bidirectional screw is blocked by the protective cover.

[0010] Further explanation: It also includes a flip cover plate. A flip cover plate is rotatably arranged at the rear side of the protective housing.

[0011] Further explanation: It also includes an indicator light. An indicator light is installed at the top of the protective housing.

[0012] Compared with the prior art, the present utility model provides a protective structure for a crane travel switch, having the following beneficial effects: 1. When the sliding rod stops moving, the first elastic member returns to its original state and drives the push rod to move forward, thereby buffering the impact force generated by squeezing the boom, and thus protecting the travel switch to avoid damage to the travel switch caused by excessive impact force.

[0013] 2. The dust cover returns to its original state to close the wiring port, thereby effectively preventing dust and other impurities from entering the interior of the protective housing.

[0014] 3. By rotating the bidirectional screw, the L-shaped clamping plates move towards each other to be clamped with the crane, and then the protective housing is fixed on the crane, so that installation can be completed without using additional tools, achieving the purpose of easy installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structure diagram of the present utility model.

[0016] Figure 2 It is a three-dimensional structure diagram of the protective housing, sliding rod, and universal ball of the present utility model.

[0017] Figure 3 It is a three-dimensional structure sectional view of the flow guide block, electric wire, and push rod of the present utility model.

[0018] Figure 4 It is a three-dimensional structure sectional view of the push rod, guide sleeve, and first elastic member of the present utility model.

[0019] Figure 5 This is a three-dimensional structural sectional view of the dust-proof sleeve, the second elastic member, and the C-shaped clamping plate of the present utility model.

[0020] Figure 6 This is a three-dimensional structural schematic diagram of the protective housing, the mounting bracket, and the handwheel of the present utility model.

[0021] Figure 7 This is a three-dimensional structural schematic diagram of the mounting bracket, the bidirectional screw, and the L-shaped clamping plate of the present utility model.

[0022] Reference numerals in the drawings: 1: protective housing; 2: sliding rod; 201: diversion block; 3: universal ball; 4: limiting frame; 5: first contact piece; 501: second contact piece; 6: electric wire; 7: adapter housing; 8: push rod; 9: guide sleeve; 10: first elastic member; 11: dust-proof sleeve; 12: second elastic member; 13: C-shaped clamping plate; 14: mounting bracket; 15: bidirectional screw; 16: handwheel; 17: L-shaped clamping plate; 18: protective shell; 19: flip cover plate; 20: indicator light. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] Embodiment 1: A protective structure of a crane travel switch. Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7, including a protective housing 1, a sliding rod 2, a diversion block 201, a universal ball 3, a limiting frame 4, a first contact piece 5, a second contact piece 501, a wire 6 and an adapter shell 7. The protective housing 1 is divided into upper and lower parts, and the upper shell and the lower shell are fixed by bolts, so as to facilitate disassembly and maintenance of the travel switch. The sliding rod 2 is slidably arranged on the front side of the protective housing 1. The diversion block 201 is fixedly connected to the sliding rod 2. The universal ball 3 is arranged at the front end of the sliding rod 2. The limiting frame 4 is fixedly connected inside the protective housing 1. Two first contact pieces 5 are arranged inside the limiting frame 4. Two second contact pieces 501 are arranged inside the limiting frame 4. Each first contact piece 5 and second contact piece 501 is connected with a wire 6. An adapter shell 7 is arranged at one end of the wire 6. A guide sleeve 9 is arranged inside the protective housing 1. A push rod 8 is slidably arranged on the guide sleeve 9. The sliding rod 2 is in contact with the push rod 8. A first elastic member 10 is connected between the push rod 8 and the guide sleeve 9. An indicator light 20 is installed on the top of the protective housing 1. When the crane boom rotates excessively, the travel switch will trigger the indicator light 20 to turn on, so as to remind the staff to stop working in time.

[0025] When the travel switch needs to be used, first install the protective housing 1 at the designated position of the crane. Then, connect the connecting wire of the rotating motor to the wire 6. When the crane boom rotates excessively, the boom will squeeze the universal ball 3, and then squeeze the sliding rod 2, so that the sliding rod 2 drives the diversion block 201 to move backward and contact the second contact piece 501, thereby cutting off the power supply of the rotating motor to avoid equipment damage. At the same time, during the backward movement of the sliding rod 2, it will squeeze the push rod 8 to move backward. When the sliding rod 2 stops moving, the first elastic member 10 returns to its original state and drives the push rod 8 to move forward, thereby buffering the impact force generated by the extrusion of the boom, so as to protect the travel switch and prevent the travel switch from being damaged due to excessive impact force.

[0026] Embodiment 2: On the basis of Embodiment 1, please refer to Figure 5 and Figure 6 , a dust-proof sleeve 11 is fixedly connected to the rear side of the protective housing 1. Two C-shaped clamping plates 13 are slidably arranged inside the protective housing 1. A second elastic member 12 is connected between the C-shaped clamping plate 13 and the protective housing 1. A flip cover plate 19 is rotatably arranged on the rear side of the protective housing 1. The flip cover plate 19 completely covers the wiring port, thereby effectively preventing dust and other impurities from entering the inside of the protective housing 1.

[0027] When it is necessary to connect the rotating motor of the crane to the travel switch, insert the connecting wire of the rotating motor into the dust-proof sleeve 11. The dust-proof sleeve 11 will deform accordingly, and the connecting wire of the rotating motor will squeeze the C-shaped clamping plate 13 to move towards the side away from each other. The second elastic member 12 will be compressed accordingly. After connecting the connecting wire of the rotating motor to the wire 6, the second elastic member 12 will return to its original state, causing the C-shaped clamping plate 13 to move towards the side close to each other, thereby clamping and fixing the connecting wire of the rotating motor. The dust-proof sleeve 11 will also return to its original state to close the wiring port, thus preventing dust and other impurities from entering the protective housing 1.

[0028] Please refer to Figure 1 、 Figure 6 and Figure 7 , an installation frame 14 is installed at the bottom of the protective housing 1. Bidirectional screws 15 are rotatably arranged on both the left and right sides of the installation frame 14. A handwheel 16 is fixedly connected to the rear end of the bidirectional screw 15. L-shaped clamping plates 17 are threadedly arranged at both the front and rear ends of the bidirectional screw 15. The L-shaped clamping plates 17 slide on the installation frame 14. Protective covers 18 are covered on both the left and right sides of the installation frame 14. The protective covers 18 cover the bidirectional screws 15, thereby protecting the bidirectional screws 15 and preventing foreign objects from winding around the bidirectional screws 15 and affecting the rotation of the bidirectional screws 15.

[0029] After moving the protective housing 1 to the predetermined position of the crane, hold the handwheel 16 and rotate the bidirectional screw 15 to make the L-shaped clamping plates 17 move towards the side close to each other to be clamped with the crane, thereby fixing the protective housing 1 on the crane, so that the installation can be completed without using additional tools, achieving the purpose of facilitating installation.

[0030] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A protective structure for a crane travel switch, comprising a protective shell (1), a sliding rod (2), a guide block (201), a universal ball (3), a limit frame (4), a first contact piece (5), a second contact piece (501), an electric wire (6) and an adapter shell (7), wherein the front side of the protective shell (1) is slidably provided with a sliding rod (2), the guide block (201) is fixedly connected to the sliding rod (2), the front end of the sliding rod (2) is provided with a universal ball (3), the protective shell (1) is fixedly connected with the limit frame (4), the inner side of the limit frame (4) is provided with two first contact pieces (5), the inner side of the limit frame (4) is provided with two second contact pieces (501), each of the first contact piece (5) and the second contact piece (501) is connected with an electric wire (6), and an adapter shell (7) is provided on one end of the electric wire (6), characterized in that: It further includes a push rod (8), a guide sleeve (9) and a first elastic member (10). A guide sleeve (9) is arranged inside the protective housing (1). A push rod (8) is slidably arranged on the guide sleeve (9). The sliding rod (2) contacts the push rod (8). A first elastic member (10) is connected between the push rod (8) and the guide sleeve (9).

2. The protective structure of a travel switch of a crane according to claim 1, characterized in that, It further includes a dust cover (11), a second elastic member (12) and a C-shaped clamping plate (13). A dust cover (11) is fixedly connected to the rear side of the protective housing (1). Two C-shaped clamping plates (13) are slidably arranged inside the protective housing (1). A second elastic member (12) is connected between the C-shaped clamping plate (13) and the protective housing (1).

3. The protective structure of a crane travel switch according to claim 1, characterized in that, It further includes a mounting bracket (14), a bidirectional screw rod (15), a hand wheel (16) and an L-shaped clamping plate (17). A mounting bracket (14) is installed at the bottom of the protective housing (1). Bidirectional screw rods (15) are rotatably arranged on both the left and right sides of the mounting bracket (14). A hand wheel (16) is fixedly connected to the rear end of the bidirectional screw rod (15). L-shaped clamping plates (17) are threadedly arranged at both the front and rear ends of the bidirectional screw rod (15). The L-shaped clamping plates (17) slide on the mounting bracket (14).

4. The protective structure of a travel switch of a crane according to claim 3, characterized in that, It further includes a protective shell (18). Protective shells (18) cover both the left and right sides of the mounting bracket (14), and the protective shells (18) shield the bidirectional screw rod (15).

5. The protective structure of a crane travel switch according to claim 2, characterized in that, It further includes a flip cover plate (19). A flip cover plate (19) is rotatably arranged at the rear side of the protective housing (1).

6. The protective structure of a travel switch of a crane according to claim 1, characterized in that, It further includes an indicator light (20). An indicator light (20) is installed at the top of the protective housing (1).

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