A crane trolley limiting device

Abstract

The present invention discloses a crane trolley limiting device, comprising a pulley, wherein two ends of the pulley are provided with a slide groove, and the slide groove is embedded in the pulley, a limiting groove is provided in the slide groove, and the limiting groove is fixedly connected to the inner wall of the slide groove, and the inclination angle of both sides of the limiting groove is 60 degrees, an energy absorbing rod is provided on the side of the limiting groove, and the energy absorbing rod is movably connected to the inner wall of the limiting groove, and the energy absorbing rod is a retractable structure, a slide rail is provided at the bottom of the pulley, and the slide rail is slidably connected to the slide groove inside the pulley, a limiting block is provided on the surface of the slide rail, and the bottom of the limiting block is embedded in the surface of the slide rail, and the limiting block is movably connected to the surface of the slide rail, and the limiting block and the limiting groove inside the slide groove can be completely embedded. The energy absorbing rod can be used to play a buffering role when the limiting groove approaches the limiting block, and the telescopic rod is driven by a cylinder to drive the limiting block to rise and fall. The limiting groove is provided in the slide groove, and the limiting groove can be driven when the pulley moves, so that the limiting block is embedded in the limiting groove to play a role in fixing the pulley.

Description

Technical Field

[0001] The present invention relates to the field of limiting devices, in particular to a limiting device for a crane trolley. Background Art

[0002] In recent years, the application scope of lifting machinery in some manufacturing enterprises, warehouses, and metallurgical industries has been continuously expanding, which also indicates the importance of lifting machinery. There are many cranes in society, and there are many types and different functions. The comprehensiveness of the functions of the crane depends on whether the trolley has so many functions; most of the trolley limiters on the market are not comprehensive in functions, or have complex structures and safety deficiencies. Due to these many deficiencies, their scope of application is also limited; therefore, it is of great significance to develop a crane trolley limiter with a wide range of applications, easy and quick use, and comprehensive functions.

[0003] However, the current trolley limit device cannot buffer the moving speed of the pulley, and the limit device will be affected by vibration, and shaking will occur when hoisting objects. Summary of the Invention

[0004] In response to the above problems, the present invention provides a crane trolley limiting device, which can use an energy-absorbing rod to play a buffering role when the limit groove approaches the limit block, and a limit groove is set inside the slide groove, which can drive the limit groove when the pulley moves, and the limit block is embedded in the limit groove to fix the limit pulley.

[0005] The technical solution of the present invention is: a crane trolley limiting device, including a pulley, wherein slide grooves are provided at both ends of the pulley, and the slide grooves are embedded in the pulley, a limiting groove is provided inside the slide groove, and the limiting groove and the inner wall of the slide groove are fixedly connected, and the inclination angle of both sides of the limiting groove is 60 degrees, an energy absorbing rod is provided on the side of the limiting groove, and the energy absorbing rod is movably connected to the inside of the limiting groove, and the energy absorbing rod is a retractable structure.

[0006] In a further technical solution, a slide rail is provided at the bottom of the pulley, and the slide rail is slidably connected to the slide groove inside the pulley, a limit block is provided on the surface of the slide rail, and the bottom of the limit block is embedded in the surface of the slide rail, and the limit block and the slide rail surface are movably connected, and the limit block and the limit groove inside the slide groove can be completely embedded. A support frame is provided at the bottom of the slide rail, and the slide rail and the surface of the support frame are fixedly connected, and the two slide rails are axially symmetrical on the support frame. Since there are two slide grooves at both ends of the pulley, the slide groove needs to correspond to two slide rails, and the support frame is a symmetrical structure, and the slide rails distributed on both sides of the support frame are also symmetrical structures. The pulley slides back and forth through the slide rail, and a limit groove is provided inside the slide groove. The limit groove can be driven when the pulley moves, and the limit block is embedded inside the limit groove to fix the pulley.

[0007] In a further technical solution, a telescopic rod is provided at the bottom of the limit block, and the top of the telescopic rod is fixedly connected to the bottom of the limit block, and a cylinder is provided at the bottom of the telescopic rod, and the telescopic rod and the cylinder are movably connected, and the cylinder is fixed to the bottom surface of the inner side of the slide rail. Before the pulley is started, the limit block to be positioned is selected, and since the telescopic rod is driven by the cylinder, the cylinder first releases pressure on the telescopic rod, so that the limit groove squeezes the limit block, the telescopic rod contracts, and the limit block contracts into the inner side of the slide rail. When the limit groove leaves, the limit block pops out from the slide rail and fits into the limit groove. The cylinder then pressurizes the telescopic rod to keep the limit block fixed, thereby limiting and fixing the pulley. When the pulley needs to leave, the cylinder releases pressure, the telescopic rod contracts, and the limit block is lowered into the inner side of the slide rail, allowing the pulley to leave.

[0008] In a further technical solution, a motor is provided on the surface of the pulley, and the motor and the pulley surface are fixedly connected. A sling is provided at the bottom of the motor, and the sling and the motor are movably connected. A hook is provided at the bottom of the sling, and the hook and the sling are fixedly connected. The motor drives the sling to move up and down, and the movement of the sling also drives the hook to move up and down.

[0009] In a further technical solution, the thickness of the stop block is 25 mm, the radius of the stop block is 35 mm-40 mm, and the maximum extension length of the telescopic rod is equal to the depth of the stop slot. The thickness of the stop block needs to be smaller than the radius of the arc of the stop block, because the tangent line at the two ends of the arc diameter is perpendicular to the diameter. If the thickness of the stop block is equal to the arc radius, when the stop slot moves to the stop block, the right angle of the tangent line will affect the squeeze of the stop slot on the stop block, and the lack of an inclined sliding surface may cause the pulley to stop.

[0010] In a further technical solution, the width of the chute is greater than the width of the limit block, and the height of the chute is greater than the thickness of the limit block, so that the limit block can move smoothly relative to the chute without being affected by friction on the inner wall of the chute.

[0011] The beneficial effects of the present invention are:

[0012] 1. The energy-absorbing rod can be used to buffer the position when the limit groove is close to the limit block;

[0013] 2. A limit groove is set inside the slide, which can drive the limit groove when the pulley moves, and the limit block is embedded in the limit groove to fix the pulley;

[0014] 3. The telescopic rod is driven by the cylinder, and then the limit block is driven up and down by the telescopic rod;

[0015] 4. The motor drives the sling up and down, and the movement of the sling also drives the lifting and lowering of the hook;

[0016] 5. The thickness of the limit block needs to be set smaller than the arc radius of the limit block to prevent the limit groove from moving to the limit block. The tangent right angle will affect the extrusion of the limit groove on the limit block. The lack of an inclined sliding surface may cause the pulley to stop. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is an axonometric view of an embodiment of the present invention;

[0018] Figure 2 is a top view of an embodiment of the present invention;

[0019] Figure 3 is a cross-sectional view of an embodiment of the present invention;

[0020] Figure 4 It is a partial cross-sectional view of an embodiment of the present invention.

[0021] Description of reference numerals:

[0022] 1. Motor; 2. Pulley; 3. Slide; 4. Slide rail; 5. Limit block; 6. Support frame; 7. Hook; 8. Cylinder; 9. Telescopic rod; 10. Energy absorbing rod; 11. Limit groove; 12. Sling. DETAILED DESCRIPTION

[0023] Example:

[0024] like Figures 1-4 As shown, a crane trolley limiting device includes a pulley 2, with a slide 3 at both ends of the pulley 2, and the slide 3 is embedded in the pulley 2. A limiting groove 11 is provided inside the slide 3, and the limiting groove 11 is fixedly connected to the inner wall of the slide 3, and the inclination angle of the two sides of the limiting groove 11 is 60 degrees. An energy absorbing rod 10 is provided on the side of the limiting groove 11, and the energy absorbing rod 10 is movably connected to the inside of the limiting groove 11, and the energy absorbing rod 10 is a retractable structure. A slide rail 4 is provided at the bottom of the pulley 2, and the slide rail 4 is slidably connected to the slide 3 inside the pulley 2. A limiting block 5 is provided on the surface of the slide rail 4, and the bottom of the limiting block 5 is embedded in the surface of the slide rail 4, and the limiting block 5 is movably connected to the surface of the slide rail 4, and the limiting block 5 can be completely embedded in the limiting groove 11 inside the slide 3. A support frame 6 is provided at the bottom of the slide rail 4, and the slide rail 4 is fixedly connected to the surface of the support frame 6, and the two slide rails 4 are axially symmetrical on the support frame 6.

[0025] The inclination angles on both sides of the limit groove 11 are set to 60 degrees, which facilitates the squeezing of the inclined surface of the limit groove 11 and the arc surface of the limit block 5. An energy-absorbing rod 10 is provided on the limit groove 11. When the limit groove 11 approaches the limit block 5, the energy-absorbing rod 10 first contacts the arc surface of the limit block 5, which plays a role of buffering and deceleration. As the limit block 5 gradually approaches, the energy-absorbing rod 10 gradually shrinks. Energy-absorbing rods 10 are provided on both sides of the limit groove 11 to facilitate the back and forth sliding of the pulley 2, and two-way buffering and deceleration. When the trolley moves, the energy-absorbing rod 10 squeezes the limit block 5, and the limit block 5 drops into the inside of the slide rail 4, and the trolley continues to move. When the limit groove 11 moves to the corresponding position of the limit block 5, the limit block 5 pops out and engages with the limit groove. After the limit block 5 and the limit groove 11 are fully embedded, the energy-absorbing rod 10 pops out.

[0026] Since there are two slide grooves 3 at both ends of the pulley 2, the slide grooves 3 need to correspond to two slide rails 4, and the support frame 6 is a symmetrical structure, and the slide rails 4 distributed on both sides of the support frame 6 are also a symmetrical structure. The pulley 2 slides back and forth through the slide rails 4, and a limit groove 11 is set inside the slide groove 3. The limit groove 11 can be driven when the pulley 2 moves, and the limit block 5 can be embedded in the limit groove 11 to fix the pulley 2.

[0027] In another embodiment, a telescopic rod 9 is provided at the bottom of the limit block 5, and the top of the telescopic rod 9 is fixedly connected to the bottom of the limit block 5. A cylinder 8 is provided at the bottom of the telescopic rod 9, and the telescopic rod 9 and the cylinder 8 are movably connected, and the cylinder 8 is fixed to the bottom surface of the inner side of the slide rail 4. Before the trolley 2 is started, the limit block 5 to be positioned is selected. Since the telescopic rod 9 is driven by the cylinder 8, the cylinder 8 first releases pressure on the telescopic rod 9, so that the limit groove 11 squeezes the limit block 5, the telescopic rod 9 contracts, and the limit block 5 contracts into the inner side of the slide rail 4. When the limit groove 11 is released, the limit block 5 pops out of the slide rail 4 and fits into the limit groove 11. The cylinder 8 then pressurizes the telescopic rod 9 to keep the limit block 5 fixed, thereby limiting and fixing the trolley 2. When the trolley 2 needs to move away, the cylinder 8 releases pressure, the telescopic rod 9 contracts, and the limit block 5 is lowered into the inner side of the slide rail 4, allowing the trolley 2 to move away.

[0028] In another embodiment, a motor 1 is provided on the surface of the pulley 2, and the motor 1 is fixedly connected to the surface of the pulley 2. A sling 12 is provided at the bottom of the motor 1, and the sling 12 is movably connected to the motor 1. A hook 7 is provided at the bottom of the sling 12, and the hook 7 is fixedly connected to the sling 12. The motor 1 drives the sling 12 to move up and down, and the movement of the sling 12 also drives the hook 7 to move up and down.

[0029] In another embodiment, the thickness of the limit block 5 is 25 mm, and the radius of the limit block 5 is 35 mm-40 mm, and the maximum extension length of the telescopic rod 9 is equal to the depth of the limit groove 11. The thickness of the limit block 5 needs to be set smaller than the arc radius of the limit block 5 because the tangent line at the two ends of the arc diameter is perpendicular to the diameter. If the thickness of the limit block 5 is equal to the arc radius, when the limit groove 11 moves to the limit block 5, the right angle of the tangent line will affect the compression of the limit groove 11 on the limit block 5. Without an inclined sliding surface, the pulley 2 may stop.

[0030] The width of the chute 3 is greater than the width of the limiting block 5, and the height of the limiting groove 11 is greater than the thickness of the limiting block 5. This allows the limiting block 5 to move smoothly relative to the chute 3 without being affected by the friction of the inner wall of the chute 3.

[0031] The above-described embodiments merely represent specific implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.

Claims

1. A crane trolley limiting device, comprising a pulley, characterized in that: The pulley is provided with a slide groove at both ends, and the slide groove is embedded in the inside of the pulley, a limit groove is provided inside the slide groove, and the limit groove is fixedly connected to the inner wall of the slide groove, and the inclination angle of both sides of the limit groove is 60 degrees, an energy absorbing rod is provided on the side of the limit groove, and the energy absorbing rod is movably connected to the inside of the limit groove, and the energy absorbing rod is a retractable structure, a slide rail is provided at the bottom of the pulley, and the slide rail and the slide groove inside the pulley are slidably connected, a limit block is provided on the surface of the slide rail, and the bottom of the limit block is embedded in the surface of the slide rail, and the limit block is movably connected to the surface of the slide rail, and the limit block and the limit groove inside the slide groove can be completely embedded, a support frame is provided at the bottom of the slide rail, and the slide rail is fixedly connected to the surface of the support frame, and the two slide rails are axially symmetrical on the support frame; A telescopic rod is provided at the bottom of the limit block, and the top of the telescopic rod is fixedly connected to the bottom of the limit block. A cylinder is provided at the bottom of the telescopic rod, and the telescopic rod and the cylinder are movably connected, and the cylinder is fixed to the bottom surface of the inner side of the slide rail. The pulley surface is provided with a motor, and the motor and the pulley surface are fixedly connected. The bottom of the motor is provided with a sling, and the sling and the motor are movably connected. The bottom of the sling is provided with a hook, and the hook and the sling are fixedly connected.

2. A crane trolley limiting device according to claim 1, characterized in that: The thickness of the limit block is 25 mm, and the radius of the limit block is 35 mm-40 mm. The maximum telescopic length of the telescopic rod is equal to the depth of the limit groove.

3. A crane trolley limiting device according to claim 1, characterized in that: The width of the sliding groove is greater than the width of the limiting block, and the height of the limiting groove is greater than the thickness of the limiting block.

Images