Horizontal limit mechanism for lifting appliance

Abstract

The present invention provides a horizontal limit mechanism for a lifting tool, which can automatically lock the position of the lifting tool at a corresponding position, and the unlocking is simple, ensuring the fast and efficient operation of the entire production line. It includes a connecting frame, a fixed mounting block, and a pair of movable limit blocks; the connecting frame is used to fixedly connect the entire horizontal limit structure of the lifting tool to the corresponding stop position at the set work station. A fixed mounting block is provided at the bottom of the connecting frame, and a power driving device is also fixedly connected to the upper part of the connecting frame; corresponding movable limit blocks are respectively pivotally connected to both sides of the fixed mounting block. The opposite ends of the two movable limit blocks form clamping ends, and the area between the two clamping ends in the clamping state forms a positioning cavity. The clamping ends are respectively connected to the corresponding positions of the fixed mounting block through elastic components; the output end of the power driving device is respectively connected to the corresponding outer connecting ends of the two movable limit blocks through connecting pieces, and the power driving device is used to drive the opposite clamping ends to clamp or open.

Description

Technical Field

[0001] The present invention relates to the technical field of sling limit structures, and specifically to a horizontal limit mechanism for a sling. Background Art

[0002] In existing assembly lines, the products to be processed need to be transported through a sling at different workstations. In actual use, the horizontal position of the sling needs to be accurately controlled, and thus a horizontal limit mechanism needs to be set up. The existing limit mechanisms have complex structures, difficult installation, and complex unlocking processes, and are not easy to operate. Summary of the Invention

[0003] In view of the above problems, the present invention provides a horizontal limit mechanism for a sling, which can automatically lock the position of the sling at the corresponding position, and has a simple unlocking process, ensuring the fast and efficient operation of the entire assembly line.

[0004] The horizontal limit mechanism for a sling is characterized in that it includes a connecting frame, a fixed mounting block, and a pair of movable limit blocks;

[0005] The connecting frame is used to fixedly connect the entire horizontal limit structure of the sling to the corresponding stop position at the set work station. The fixed mounting block is arranged at the bottom of the connecting frame, and a power driving device is also fixedly connected to the upper part of the connecting frame;

[0006] The two sides of the fixed mounting block are respectively pivotally connected with corresponding movable limit blocks. The facing ends of the two movable limit blocks form clamping ends, and the area between the two clamping ends in the clamped state forms a positioning cavity. The clamping ends are respectively connected to the corresponding positions of the fixed mounting block through elastic members;

[0007] The output end of the power driving device is respectively connected to the corresponding outer connecting ends of the two movable limit blocks through connecting members, and the power driving device is used to drive the facing clamping ends to clamp or open.

[0008] It is further characterized in that:

[0009] The connecting frame includes connecting vertical plates, a top mounting structure, and a bottom mounting structure. The connecting vertical plates are respectively connected to the top mounting structure and the bottom mounting structure. Mounting positioning holes are also arranged in the height direction of the connecting vertical plates, and the mounting positioning holes are used to fixedly install the entire structure at the corresponding limit position. The fixed mounting block is fixedly connected to the lower surface of the bottom mounting structure;

[0010] The lower surface of the fixed mounting block is provided with a guiding inner groove. The middle positions of the corresponding side movable limit blocks are pivotally connected to the two sides inside the guiding inner groove through a first pivot shaft. The clamping ends on the inner sides of the two movable limit blocks are arranged symmetrically with respect to the vertical center plane of the fixed mounting block;

[0011] The elastic member is a linear spring;

[0012] The clamping end includes an inner stop arc surface and an outer guiding inclined surface; one end of the linear spring is fixedly connected to the upper part of the clamping end, and the other end of the linear spring is fixedly installed in an inner concave spring groove, and the inner concave spring groove is located in the inner concave guiding part of the upper surface of the guiding inner groove. The linear spring drives the tip formed by the inner stop arc surface and the outer guiding inclined surface to protrude downward, and the connecting end on the outer side of the movable limit block protrudes from the corresponding side of the fixed mounting block;

[0013] The power driving device is a vertically driving cylinder. The vertically driving cylinder is fixedly connected to the top mounting structure. The lower end of the connecting end is pivotally connected to the lower end of the connecting rod. The lower piston end of the vertically driving cylinder is fixedly connected to a connecting block, and the two side ends of the connecting block are respectively pivotally connected to the upper ends of the connecting rod.

[0014] It is further characterized in that:

[0015] Preferably, both the top mounting structure and the bottom mounting structure are forwardly convex horizontal plates, making the structure simple;

[0016] The cylinder seat of the vertically driving cylinder is fixedly installed on the lower surface of the top mounting structure. The two side ends of the connecting block are respectively provided with connecting arms protruding obliquely downward. The connecting arms are respectively pivotally connected to the corresponding positions of the upper ends of the connecting rod through a rotating shaft and a positioning pin;

[0017] The two connecting ends of the movable limit block are respectively provided with upwardly convex connecting arms. The upwardly convex connecting arms are respectively pivotally connected to the corresponding positions of the lower ends of the connecting rod through a rotating shaft and a positioning pin. The connecting rod is arranged in a state of inclining outward from top to bottom;

[0018] A sensor is fixedly installed on the front end face of the fixed mounting block. The sensing end of the sensor is arranged directly below the positioning cavity corresponding to the two clamping ends to ensure accurate sensing of the upwardly convex positioning block of the spreader. The sensor is externally connected to the horizontal driving device of the spreader. After the sensor senses the upwardly convex positioning block, the horizontal driving device stops driving;

[0019] The tip formed by the inner stop arc surface and the outer guiding inclined surface is an arc structure to ensure that the upwardly convex positioning block will not be damaged.

[0020] After adopting the above technical solution, an upper convex positioning block is arranged on the upper part of the spreader corresponding to the horizontal limiting mechanism of the spreader. The upper convex positioning block moves horizontally until it enters the positioning cavity formed by the clamping ends corresponding to the two movable limiting blocks after pressing the outer guiding inclined surface of the clamping end on one side. Due to the action of the elastic component, the upper convex positioning block is blocked in the positioning cavity, so that the spreader accurately stays at the set working position. When the spreader needs to move forward normally, the power driving device moves downward, so that the clamping ends of the two movable limiting blocks are in an unlocked state, and there is no blocking structure in the moving direction of the upper convex positioning block. Then the spreader continues to move to the corresponding position of the next working station and is accurately positioned again. It can automatically lock the position of the spreader at the corresponding position, and the unlocking is simple, ensuring the fast and efficient operation of the entire production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a perspective view of the present invention;

[0022] Figure 2 is a schematic side view structure diagram of the present invention;

[0023] Figure 3 is Figure 2 A-A cross-sectional structure diagram of (when the vertical cylinder is in the non-operating state);

[0024] Figure 4 is Figure 2 A-A cross-sectional structure diagram of (when the vertical cylinders operate towards each other);

[0025] The names corresponding to the numbers in the figure are as follows:

[0026] Connecting frame 1, connecting vertical plate 2, top mounting structure 3, bottom mounting structure 4, mounting positioning hole 5, fixed mounting block 6, guiding inner groove 7, first pivot shaft 8, movable limiting block 9, clamping end 10, inner stopping arc surface 11, outer guiding inclined surface 12, linear spring 13, inner concave spring groove 14, tip 15, connecting end 16, connecting rod 17, vertical driving cylinder 18, lower piston end 19, connecting block 20, connecting arm 21, upper convex connecting arm 22, sensor 23, sensing end 24, positioning cavity 25. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The spreader horizontal limiting mechanism is shown in Figures 1-4 : It includes a connecting frame 1, a fixed mounting block 6, and a pair of movable limiting blocks 9;

[0028] The connecting frame 1 is used to fixedly connect the entire spreader horizontal limiting structure to the corresponding stopping position at the set working station. The fixed mounting block 6 is arranged at the bottom of the connecting frame 1, and a power driving device is also fixedly connected to the upper part of the connecting frame 1;

[0029] On both sides of the fixed mounting block 6, corresponding movable limiting blocks 9 are respectively pivotally connected. The facing ends of the two movable limiting blocks 9 form clamping ends 10. The area between the two clamping ends 10 in the clamping state forms a positioning cavity 25. The clamping ends 10 are respectively connected to the corresponding positions of the fixed mounting block 6 through elastic members;

[0030] The output end of the power driving device is respectively connected to the corresponding outer connecting ends 16 of the two movable limiting blocks 9 through connecting members. The power driving device is used to drive the facing clamping ends 10 to clamp or open.

[0031] The connecting frame 1 includes connecting vertical plates 2, a top mounting structure 3, and a bottom mounting structure 4. The connecting vertical plates 2 are respectively connected to the top mounting structure 3 and the bottom mounting structure 4. Mounting positioning holes 5 are further provided in the height direction of the connecting vertical plates 2. The mounting positioning holes 5 are used to fixedly install the entire structure at the corresponding limiting positions. The lower surface of the bottom mounting structure 4 is fixedly connected with a fixed mounting block 6;

[0032] The lower surface of the fixed mounting block 6 is provided with a guiding inner groove 7. The middle positions of the corresponding movable limiting blocks 9 on both sides are pivotally connected to the inside of both sides of the guiding inner groove 7 through a first pivot shaft 8. The clamping ends 10 on the inner sides of the two movable limiting blocks 9 are arranged symmetrically towards the vertical center plane of the fixed mounting block 6.

[0033] In specific implementation, the elastic member is a linear spring 13, and the power driving device is a vertically driving cylinder 18. The clamping end 10 includes an inner stopping arc surface 11 and an outer guiding inclined surface 12. One end of the linear spring 13 is fixedly connected to the upper part of the clamping end 10, and the other end of the linear spring 13 is fixedly installed in an inner concave spring groove 14. The inner concave spring groove 14 is located in the inner concave guiding part of the upper surface of the guiding inner groove 7. The linear spring 13 drives the tip 15 formed by the inner stopping arc surface 11 and the outer guiding inclined surface 12 to protrude downward. The connecting end 16 on the outside of the movable limiting block 9 protrudes outside the corresponding side of the fixed mounting block 6. The lower end of the connecting end 16 is pivotally connected to the lower end of a connecting rod 17. A vertically driving cylinder 18 is fixedly connected to the top mounting structure 3. The lower piston end 19 of the vertically driving cylinder 18 is fixedly connected with a connecting block 20. The two side ends of the connecting block 20 are respectively pivotally connected to the upper ends of the connecting rod 17.

[0034] In a preferred embodiment, both the top mounting structure 3 and the bottom mounting structure 4 are forwardly convex horizontal plates, making the structure simple;

[0035] The cylinder seat of the vertically driving cylinder 18 is fixedly installed on the lower surface of the top mounting structure 3. The two side ends of the connecting block 20 are respectively provided with connecting arms 21 protruding obliquely downward. The connecting arms 21 are respectively pivotally connected to the corresponding positions of the upper ends of the connecting rod 17 through a rotating shaft and a positioning pin;

[0036] The two connecting ends of the movable limit block 9 are respectively provided with upper convex connecting arms 22. The upper convex connecting arms 22 are respectively pivotally connected to the corresponding positions at the lower ends of the connecting rods 17 through a rotating shaft and a positioning pin. The connecting rods 17 are arranged in a state of inclining outward from top to bottom.

[0037] A sensor 23 is fixedly installed on the front end face of the fixed installation block 6. The sensing end 24 of the sensor 23 is arranged directly below the positioning cavity 25 corresponding to the two clamping ends 10 to ensure accurate sensing of the upper convex positioning block (not shown in the figure, belonging to a conventional stop positioning structure) of the spreader. The sensor 23 is externally connected to the horizontal driving device of the spreader. After the sensor 23 senses the upper convex positioning block, the horizontal driving device stops driving.

[0038] The tip 15 formed by the inner stop arc surface 11 and the outer guiding inclined surface 12 is of an arc structure to ensure that the upper convex positioning block will not be damaged.

[0039] The working principle is as follows. The upper part of the spreader is provided with an upper convex positioning block corresponding to the horizontal limit mechanism of the spreader. The upper convex positioning block moves horizontally until it squeezes the outer guiding inclined surface of one side of the clamping end and then enters the positioning cavity between the two inner stop arc surfaces. Due to the action of the linear spring and the sufficient slope of the inner stop arc surface, the upper convex positioning block is stopped in the positioning cavity, so that the spreader accurately stays at the set working position. When the spreader needs to move forward normally, the lower piston end of the vertical cylinder moves downward, causing the connecting rod to drive the connecting end to rotate downward around the first pivot shaft. Then, the tips formed by the inner stop arc surface and the outer guiding inclined surface move towards each other, so that there is no stop structure in the moving direction of the upper convex positioning block. After that, the spreader continues to move to the corresponding position of the next working station and is accurately positioned again. It can automatically lock the position of the spreader at the corresponding position, and the unlocking is simple, ensuring the fast and efficient operation of the entire production line.

[0040] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0041] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. Hoist horizontal limit mechanism, Characterized in that: It includes a connecting frame, a fixed mounting block, and a pair of movable limit blocks; The connecting frame is used to fixedly connect the entire hoist horizontal limit structure to the corresponding stop position at the set work station. The fixed mounting block is arranged at the bottom of the connecting frame, and a power driving device is also fixedly connected to the upper part of the connecting frame; On both sides of the fixed mounting block, corresponding movable limit blocks are pivotally connected respectively. The facing ends of the two movable limit blocks form clamping ends, and the area between the two clamping ends in the clamping state forms a positioning cavity. The clamping ends are respectively connected to the corresponding positions of the fixed mounting block through elastic components; The output end of the power driving device is respectively connected to the corresponding outer connecting ends of the two movable limit blocks through connecting pieces. The power driving device is used to drive the facing clamping ends to clamp or open; The connecting frame includes a connecting vertical plate, a top mounting structure, and a bottom mounting structure. The connecting vertical plate is respectively connected to the top mounting structure and the bottom mounting structure. Mounting positioning holes are also arranged in the height direction of the connecting vertical plate. The mounting positioning holes are used to fixedly install the entire structure at the corresponding limit position. The lower surface of the bottom mounting structure is fixedly connected with a fixed mounting block; The lower surface of the fixed mounting block is provided with a guiding inner groove. The middle positions of the corresponding side movable limit blocks are pivotally connected to the inside of both sides of the guiding inner groove through a first pivot shaft. The clamping ends on the inner sides of the two movable limit blocks are arranged centered on the vertical center plane of the fixed mounting block; The elastic component is a linear spring. The clamping end includes an inner stop arc surface and an outer guiding inclined surface. One end of the linear spring is fixedly connected to the upper part of the clamping end, and the other end of the linear spring is fixedly installed in an inner concave spring groove. The inner concave spring groove is located in the inner concave guiding part of the upper surface of the guiding inner groove. The linear spring drives the tip formed by the inner stop arc surface and the outer guiding inclined surface to protrude downward. The connecting end on the outside of the movable limit block protrudes from the corresponding side of the fixed mounting block; A sensor is fixedly installed on the front end face of the fixed mounting block. The sensing end of the sensor is arranged directly below the positioning cavity corresponding to the two clamping ends.

2. The hoist horizontal limit mechanism according to claim 1, Characterized in that: The power driving device is a vertically driven cylinder. The vertically driven cylinder is fixedly connected to the top mounting structure. The lower end of the connecting end is pivotally connected to a connecting rod. The lower piston end of the vertically driven cylinder is fixedly connected with a connecting block. The two side ends of the connecting block are respectively pivotally connected to the upper ends of the connecting rod.

3. The hoist horizontal limit mechanism according to claim 1, Characterized in that: Both the top mounting structure and the bottom mounting structure are horizontally protruding front plates.

4. The hoist horizontal limit mechanism according to claim 2, Characterized in that: The cylinder seat of the vertically driven cylinder is fixedly installed on the lower surface of the top mounting structure. The two side ends of the connecting block are respectively provided with connecting arms protruding obliquely downward. The connecting arms are respectively pivotally connected to the corresponding positions of the upper ends of the connecting rod through a rotating shaft and a positioning pin.

5. The hoist horizontal limit mechanism according to claim 4, Characterized in that: The two connecting ends of the movable limit block are respectively provided with upward convex connecting arms, and the upward convex connecting arms are respectively pivotally connected to the corresponding positions at the lower ends of the connecting rods through rotating shafts and positioning pins, and the connecting rods are arranged in a state of inclining outward from top to bottom.

6. The horizontal limit mechanism of the lifting appliance according to claim 1, characterized in that: The tip formed by the inner stop arc surface and the outer guiding inclined surface is an arc structure.

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