Safety limiting device for crane trolley

Abstract

The utility model discloses a safety limiting device for a crane trolley, and belongs to the technical field of crane trolley components. Comprising two sets of safety limiting assemblies which are fixed to the input side and the output side of a crane trolley correspondingly. The safety limiting assembly comprises a U-shaped frame, a supporting straddle frame, a sliding rod assembly, a walking wheel module and a limiting detection assembly, a sliding way is formed in the inner side of the U-shaped frame, and two sets of sliding sleeves are fixed to the outer side of the U-shaped frame; a top cover is fixed to the top of the U-shaped frame. The supporting straddle frame comprises a supporting plate, and open grooves are formed in the top and the bottom of the supporting plate. A connecting plate is hinged to the inner side of the open groove through a double-end bolt and a nut, and the other end of the connecting plate is fixed to a frame of the crane trolley. The safety limiting device for the crane trolley can safely limit walking and bouncing of the crane trolley, and the crane trolley is safer to use.

Description

Technical Field

[0001] The utility model specifically relates to a safety limiting device for a crane trolley, and belongs to the technical field of crane trolley components. Background Art

[0002] The crane trolley has a large deadweight. If the crane trolley collides with an obstacle during operation, it will cause damage to the trolley and even cause a safety accident. At present, most devices for limiting the position of the crane trolley are equipped with anti-collision limit devices at both ends of the track. These can only be used to prevent or reduce collisions between the crane trolley and the crane end beam, but cannot prevent or reduce collisions between the crane trolley and obstacles in the middle of the track. To this end, Chinese Patent Authorization Publication No.: CN205855817U discloses a crane trolley travel limit safety device, which includes a crane main beam, a travel track provided on the upper surface of the crane main beam, a travel mechanism provided on the track, a trolley frame provided on the travel mechanism, baffles provided at the front and rear ends of the trolley frame, and a buffer provided on the side of the baffle away from the trolley frame. This structure is simple and reasonable, highly safe, and easy to use. However, if dust accumulates on the track to a certain thickness or there is foreign matter on the track, the crane trolley's travel wheels are prone to bumping or deviating from the travel straight line when traveling on the track, causing the wheel frame to scratch the guide rail. Utility Model Content

[0003] In order to solve the above problems, the utility model proposes a crane trolley safety limit device, which can limit the crane trolley's walking safety and bouncing safety, making the crane trolley safer to use.

[0004] The utility model of the crane trolley safety limit device includes a safety limit assembly, wherein the safety limit assembly is provided with two groups and is fixed to the input side and the output side of the crane trolley respectively; the safety limit assembly includes

[0005] A U-shaped frame, wherein a slideway is provided on the inner side of the U-shaped frame, two sets of sliding sleeves are fixed on the outer side of the U-shaped frame; and a top cover is fixed on the top of the U-shaped frame;

[0006] The support span includes a support plate with open slots at the top and bottom of the support plate; a connecting plate is hingedly connected to the inner side of the open slot by double-ended bolts and nuts, and the other end of the connecting plate is fixed to the frame of the crane trolley;

[0007] A slide rod assembly, the slide rod assembly comprising a slide rod, both ends of which moveably pass through a slide sleeve and a support plate and are screwed onto a limit nut; a spring body is provided between the slide sleeve and the support plate;

[0008] A walking wheel module, comprising a sliding seat and a walking shaft, wherein the outer diameters of both ends of the walking shaft are smaller than the outer diameter of the middle section, the walking shaft is provided with a roller via a bearing and is screwed with a first anti-slip nut; the other end of the walking shaft movably passes through the sliding seat and is screwed with a second anti-slip nut; the sliding seat is slidably arranged on a U-shaped frame;

[0009] The limit detection component includes a bounce detection component fixed to the bottom surface of the top cover; the limit detection component is fixed between the sliding sleeve and the support plate; the limit detection component is connected to the PLC of the crane trolley.

[0010] Fixing the safety limit assembly to the input and output sides of the crane trolley can monitor the travel process of the crane trolley; the U-shaped frame of the safety limit assembly can carry the traveling wheel module, and the traveling wheel module can slide up and down along the U-shaped frame, so that the bounce detection assembly can monitor the travel condition of the traveling wheel module in real time; when the traveling wheel module is moving, the traveling wheel module moves along the slide bar assembly. When the travel of the traveling wheel module is restricted, the spring body is compressed, thereby triggering the limit detection assembly. After the bounce detection assembly and the limit detection assembly detect the limit signal, they transmit the signal to the PLC of the crane trolley, thereby sending a stop signal.

[0011] Furthermore, the bounce detection component includes a detection base plate fixed on the slide, and an infrared rangefinder is fixed on the bottom surface of the top cover facing the detection base plate; when the roller is moving and contacts an obstacle on the guide rail, the roller is lifted, and at this time, the slide slides up along the U-shaped frame, and the detection base plate is lifted synchronously, and the infrared rangefinder measures the distance in real time. When the distance is less than the set value, a trigger signal is issued to achieve safe parking of the crane trolley.

[0012] Furthermore, the limit detection component includes a mechanical proximity switch or an electronic proximity switch fixed between the sleeve and the support plate; the electronic proximity switch adopts an infrared proximity switch. When the walking wheel module is restricted in walking, the sleeve and the support plate approach each other, and the spring body is compressed, thereby triggering the mechanical proximity switch or the electronic proximity switch to achieve safe parking of the crane trolley.

[0013] Furthermore, a guide rail end proximity switch is fixed on the side of the U-shaped frame away from the crane trolley; when the crane trolley moves close to the end of the track, the guide rail end proximity switch is triggered to achieve safe parking of the crane trolley. The guide rail end proximity switch adopts an infrared proximity switch. When the guide rail end proximity switch is not triggered, the crane trolley is safely parked by triggering the limit detection component.

[0014] Furthermore, the connecting plate is a Z-shaped structure, and the U-shaped frame can be fixed to the frame of the crane trolley through the connecting plate. By adjusting the size of the connecting plate, the roller falls onto the center line of the guide rail.

[0015] Compared with the existing technology, the crane trolley safety limit device of the utility model restricts the movement of the walking wheel module when a large, immovable obstacle appears on the guide rail, thereby triggering the limit detection component to achieve safe parking of the crane trolley. When a small obstacle appears on the guide rail, the roller can be bumped, which can trigger the bounce detection component to achieve safe parking of the crane trolley, making the crane trolley safer to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of the safety limit assembly of the utility model.

[0017] Figure 2 This is a schematic diagram of the installation structure of the U-shaped frame, sliding sleeve and top cover of the utility model.

[0018] Figure 3 This is a schematic diagram of the overall structure of the walking wheel module of the present utility model.

[0019] Figure 4 This is a schematic diagram of the connecting plate structure of the present utility model.

[0020] Figure numerals: 1. U-shaped frame, 2. Slide sleeve, 3. Top cover, 4. Support plate, 5. Connecting plate, 6. Crane trolley, 7. Slide rod, 8. Spring body, 9. Slide seat, 10. Traveling shaft, 11. Roller, 12. Detection seat plate, 13. Infrared rangefinder, 14. Mechanical proximity switch, 15. Guide rail end proximity switch. DETAILED DESCRIPTION

[0021] Example 1:

[0022] like Figures 1 to 4 The crane trolley safety limit device shown in the figure includes a safety limit assembly, wherein the safety limit assembly is provided with two groups and is fixed to the input side and the output side of the crane trolley respectively; the safety limit assembly includes

[0023] A U-shaped frame 1, wherein a slideway is provided on the inner side of the U-shaped frame 1, and two sets of sliding sleeves 2 are fixed on the outer side of the U-shaped frame 1; a top cover 3 is fixed on the top of the U-shaped frame 1;

[0024] The support span includes a support plate 4 with open slots at the top and bottom. A connecting plate 5 is hinged to the inside of the open slot via double-ended bolts and nuts, and the other end of the connecting plate 5 is fixed to the frame of the crane trolley 6.

[0025] The slide rod assembly includes a slide rod 7, both ends of which are movable through the slide sleeve 2 and the support plate 4 and are screwed to the limit nuts; the slide rod 7 is provided with a spring body 8 between the slide sleeve 2 and the support plate 4;

[0026] The walking wheel module includes a slide 9 and a walking shaft 10. The outer diameters of the two ends of the walking shaft 10 are smaller than the outer diameter of the middle section. The walking shaft 10 is installed with a roller 11 through a bearing and is screwed with a first anti-slip nut; the other end of the walking shaft 10 moves through the slide 9 and is screwed with a second anti-slip nut; the slide 9 is slidably set on the U-shaped frame 1;

[0027] The limit detection component includes a bounce detection component fixed to the bottom surface of the top cover 3; the limit detection component is fixed between the sliding sleeve 2 and the support plate 4; the limit detection component is connected to the PLC of the crane trolley 6.

[0028] Fixing the safety limit assembly to the input and output sides of the crane trolley 6 can monitor the walking process of the crane trolley 6; the U-shaped frame 1 of the safety limit assembly can carry the walking wheel module, and the walking wheel module can slide up and down along the U-shaped frame 1, so that the bounce detection assembly can monitor the walking condition of the walking wheel module in real time; when the walking wheel module is moving, the walking wheel module moves along the slide bar 7 assembly. When the walking wheel module is restricted in its movement, the spring body 8 is compressed, thereby triggering the limit detection assembly. After the bounce detection assembly and the limit detection assembly detect the limit signal, they transmit the signal to the PLC of the crane trolley 6, thereby issuing a stop signal.

[0029] The bounce detection component includes a detection base plate 12 fixed on the slide 9, and an infrared rangefinder 13 is fixed on the bottom surface of the top cover 3 facing the detection base plate 12; when the roller 11 is moving and contacts an obstacle on the guide rail, the roller 11 is lifted. At this time, the slide 9 slides up along the U-shaped frame 1, and the detection base plate 12 is lifted synchronously. The infrared rangefinder 13 measures the distance in real time. When the distance is less than the set value, a trigger signal is issued to achieve a safe parking of the crane trolley 6.

[0030] The limit detection component includes a mechanical proximity switch 14 or an electronic proximity switch fixed between the sleeve 2 and the support plate 4; the electronic proximity switch adopts an infrared proximity switch. When the travel of the walking wheel module is restricted, the sleeve 2 and the support plate 4 approach each other, and the spring body 8 is compressed, thereby triggering the mechanical proximity switch 14 or the electronic proximity switch to achieve safe parking of the crane trolley 6.

[0031] A guide rail end proximity switch 15 is fixed to the side of the U-shaped frame 1 away from the crane trolley 6; when the crane trolley 6 moves close to the end of the track, the guide rail end proximity switch 15 is triggered to achieve safe parking of the crane trolley 6. The guide rail end proximity switch 15 adopts an infrared proximity switch. When the guide rail end proximity switch 15 is not triggered, the crane trolley 6 is safely parked by triggering the limit detection component.

[0032] The connecting plate 5 is a Z-shaped structure, and the U-shaped frame 1 can be fixed to the frame of the crane trolley 6 through the connecting plate 5. By adjusting the size of the connecting plate 5, the roller 11 falls into the center line of the guide rail.

[0033] The above embodiments are only preferred implementations of the present invention. Therefore, any equivalent changes or modifications made according to the structure, features and principles described in the scope of application of the present invention are included in the scope of application of the present invention.

Claims

1. A crane trolley safety limit device, characterized by: It includes a safety limit assembly, which is provided with two groups and is fixed on the input side and output side of the crane trolley respectively; the safety limit assembly includes A U-shaped frame, wherein a slideway is provided on the inner side of the U-shaped frame, two sets of sliding sleeves are fixed on the outer side of the U-shaped frame; and a top cover is fixed on the top of the U-shaped frame; The support span includes a support plate with open slots at the top and bottom of the support plate; a connecting plate is hingedly connected to the inner side of the open slot by double-ended bolts and nuts, and the other end of the connecting plate is fixed to the frame of the crane trolley; A slide rod assembly, the slide rod assembly comprising a slide rod, both ends of which moveably pass through a slide sleeve and a support plate and are screwed onto a limit nut; a spring body is provided between the slide sleeve and the support plate; A walking wheel module, comprising a sliding seat and a walking shaft, wherein the outer diameters of both ends of the walking shaft are smaller than the outer diameter of the middle section, the walking shaft is provided with a roller via a bearing and is screwed with a first anti-slip nut; the other end of the walking shaft movably passes through the sliding seat and is screwed with a second anti-slip nut; the sliding seat is slidably arranged on a U-shaped frame; The limit detection component includes a bounce detection component fixed to the bottom surface of the top cover; the limit detection component is fixed between the sliding sleeve and the support plate; the limit detection component is connected to the PLC of the crane trolley.

2. The crane trolley safety limit device according to claim 1, characterized in that: The bounce detection component comprises a detection base plate fixed on the slide, and an infrared rangefinder is fixed on the bottom surface of the top cover facing the detection base plate.

3. The crane trolley safety limit device according to claim 1, characterized in that: The limit detection component includes a mechanical proximity switch or an electronic proximity switch fixed between the sliding sleeve and the support plate.

4. The crane trolley safety limit device according to claim 1, characterized in that: A guide rail end proximity switch is fixed on the side of the U-shaped frame away from the crane trolley.

5. The crane trolley safety limit device according to claim 1, characterized in that: The connecting plate is a Z-shaped structure.

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