Mechanism for limiting and releasing loading trolley of lifting platform and arrangement structure of mechanism

Abstract

The utility model discloses a mechanism for limiting and releasing a loading trolley of a lifting platform and an arrangement structure of the mechanism. The mechanism comprises a non-return mechanism and a blocking mechanism, wherein the non-return mechanism is arranged in a loading trolley system of the lifting platform and used for preventing the loading trolley from retreating, and the blocking mechanism is used for preventing the loading trolley from advancing. The non-return mechanism comprises a non-return mechanism bracket; the non-return plate is hinged to the non-return mechanism support, and height difference exists between the front side and the rear side of the non-return plate; the non-return frame is matched with the non-return plate and is used for pressing down the higher side plate surface of the non-return plate so as to enable the non-return plate to rotate around a hinge point of the non-return plate; the blocking mechanism comprises a blocking mechanism support, a blocking frame, a touch plate and a blocking shaft which can slide up and down and is arranged in the blocking mechanism support. The top of the blocking shaft penetrates through the blocking mechanism support to be connected with a blocking block which can be matched with the blocking frame and limit advancing of the blocking frame, the bottom of the blocking shaft penetrates through the blocking mechanism support to be hinged to a rotating shaft, and the rotating shaft can be matched with the touch plate to drive the blocking shaft to slide downwards.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical conveying equipment, in particular to a mechanism for limiting and releasing a lifting platform loading trolley and an arrangement structure thereof. Background Art

[0002] Currently, factory conveyor lines often feature wheeled carts moving along fixed tracks, often accompanied by vertically moving equipment such as lifts to lift the carts. For safety reasons, a mechanism must be in place to limit the cart's position while it's on the lift to prevent it from escaping.

[0003] Usually, an electric cylinder or motor is used as a power source to limit the position of the cargo trolley on the lifting platform. This is not only costly, but also prone to safety accidents when the switch of the limit mechanism fails or is triggered by mistake. Utility Model Content

[0004] The purpose of this utility model is to solve the shortcomings of the above-mentioned background technology and to provide a mechanism and its layout structure for limiting and releasing a lifting platform loading trolley, which has low cost, high reliability, does not require electronic control, and will not cause false triggering.

[0005] To achieve this purpose, the utility model is designed with a mechanism for limiting and releasing the lifting platform loading trolley, which includes a non-return mechanism arranged in the lifting platform loading trolley system for preventing the loading trolley from retreating and a blocking mechanism for preventing the loading trolley from moving forward; the non-return mechanism includes a non-return mechanism bracket; a non-return plate hingedly connected to the non-return mechanism bracket and having a height difference between the front and rear sides; and a non-return frame cooperating with the non-return plate and used to lower the higher side plate surface of the non-return plate and rotate the non-return plate around its hinge point; the blocking mechanism includes a blocking mechanism bracket, a blocking frame, a touch plate and a blocking shaft arranged in the blocking mechanism bracket which can slide up and down; the top of the blocking shaft passes through the blocking mechanism bracket and is connected to a blocking block which can cooperate with the blocking frame to limit the advancement of the blocking frame, and the bottom of the blocking shaft passes through the blocking mechanism bracket and is hingedly connected to a rotating shaft, and the rotating shaft can cooperate with the touch plate to drive the blocking shaft to slide downward.

[0006] Furthermore, the non-return mechanism also includes a lifting device for adjusting the height of the non-return mechanism bracket, and the non-return mechanism bracket is fixed on the driving end of the lifting device.

[0007] Furthermore, the lifting device includes a lifting cylinder, and the non-return mechanism bracket is fixed on the piston rod of the lifting cylinder.

[0008] Furthermore, a limiting structure for limiting the downward movement of the lower side surface of the check plate to an extreme position is fixed on the check mechanism bracket.

[0009] Furthermore, a blocking shaft reset spring is fixed in the blocking mechanism bracket, the blocking shaft is coaxially arranged in the blocking shaft reset spring, and the top of the blocking shaft passes through the blocking shaft reset spring and is fixedly connected to a connecting plate that cooperates with the blocking shaft reset spring and is used to compress the blocking shaft reset spring or withstand the reset force of the blocking shaft reset spring to enable the blocking shaft to move upward and reset.

[0010] Furthermore, the top of the blocking shaft is hingedly connected to the blocking block, and a blocking block return spring is fixedly connected between the top of the blocking shaft and the blocking block.

[0011] Furthermore, the bottom of the blocking shaft passes through the blocking mechanism bracket and is hingedly connected to one end of the rotating shaft, the middle of the rotating shaft is hingedly connected to the blocking mechanism bracket, and the other end of the rotating shaft is a cantilever structure for cooperating with the touch panel.

[0012] Furthermore, one end of the rotating shaft is provided with a waist-shaped hole along its length direction, and the bottom of the blocking shaft is fixedly connected to an adjustment shaft arranged in the waist-shaped hole.

[0013] Furthermore, the touch plate is arranged at an angle to the rotating shaft, and the other end of the rotating shaft can move downward and contact the upper surface of the touch plate. Through the contact between the upper surface of the touch plate and the other end of the rotating shaft, the rotating shaft is driven to rotate around its central hinge point, so that one end of the rotating shaft drives the blocking shaft to move downward.

[0014] Furthermore, an arrangement structure of a mechanism for limiting and releasing a lifting platform loading trolley includes a lifting platform, a trolley track fixed on the lifting platform, a loading trolley arranged on the trolley track and the above-mentioned mechanism for limiting and releasing a lifting platform loading trolley, the front and rear sides of the loading trolley are respectively fixed with the blocking frame and the non-return frame; the front and rear sides of the lifting platform along the movement direction of the loading trolley are fixed with the blocking mechanism bracket and the non-return mechanism bracket; the front upper plate surface of the non-return plate is located above the rear upper plate surface of the non-return plate, and the touch plate is located below the lifting platform.

[0015] The beneficial effects of the utility model are:

[0016] The check plate of the non-return mechanism has a height difference between the front and rear sides, and cooperates with the check frame. When the trolley tends to move backward, the higher side of the check plate is pressed down by the check frame, rotating around the hinge point to form a block, preventing the trolley from accidentally moving backward and improving the safety and stability of operation. When the trolley moves forward normally, it can pass through the check plate relatively smoothly without causing excessive obstruction to the trolley's operation.

[0017] A blocking mechanism prevents the cart from advancing: a block at the top of the blocking shaft works in conjunction with the blocking frame to restrict the cart's movement when needed, providing a precise limiter and preventing the cart from exceeding its specified position, ensuring workflow accuracy. A pivoting shaft, hinged at the bottom of the blocking shaft, interacts with the touch panel. When the cart needs to be released, a specific trigger mechanism activates the pivoting shaft, driving the blocking shaft downward, which in turn lowers the block and allows the cart to pass smoothly. This design is highly responsive and meets the needs for rapid cart release in various work scenarios.

[0018] The mechanism designed in this utility model consists of a non-return mechanism and a blocking mechanism. It has a relatively simple and compact structure, occupies little space, and can be easily installed in the lifting platform loading trolley system. It is suitable for a variety of working environments and space constraints. The various components work closely together, and the operation is reliable. It can adapt to loading trolleys of different specifications and loads, and has strong versatility and applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view of the positioning of the cargo trolley by the stop mechanism and the blocking mechanism of the utility model;

[0020] Figure 2 This is a front view of the non-return frame pressing down the non-return plate in the utility model;

[0021] Figure 3 This is a front view of the non-return frame through the non-return plate in the utility model;

[0022] Figure 4 This is a front view of the blocking mechanism in the utility model blocking the cargo trolley from moving forward;

[0023] Figure 5 This is a front view of the blocking mechanism in the present invention releasing the cargo trolley;

[0024] Among them, 1-check mechanism, 2-blocking mechanism, 3-check mechanism bracket (3.1-check mechanism base, 3.2-check plate mounting seat), 4-check plate, 5-check frame, 6-blocking mechanism bracket (6.1-blocking mechanism mounting seat, 6.2-blocking mechanism guide sleeve, 6.3-blocking mechanism connecting rod), 7-blocking frame, 8-touch plate, 9-blocking shaft, 10-blocking block, 11-rotating shaft, 12-lifting cylinder, 13-limiting column, 14-blocking shaft return spring, 15-connecting plate, 16-blocking block return spring, 17-waist hole, 18-adjusting shaft, 19-sliding bushing, 20-touch plate bracket (20.1-bracket bottom plate, 20.2-touch plate adjustment plate, 20.3-touch plate hinge seat), 21-touch plate bracket fixing seat, 22-lifting platform, 23-trolley track, 24-carrying trolley. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only a part of the embodiments of the present invention, rather than all the embodiments. In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0026] like Figure 1 —5 is a mechanism for limiting and releasing the lifting platform loading trolley, which is arranged in the lifting platform loading trolley system.

[0027] The lifting platform loading trolley system includes a lifting platform 22 , a trolley track 23 fixed on the lifting platform 22 , and a loading trolley 24 arranged on the trolley track 23 .

[0028] A ground track (not shown) is fixed to the ground below the platform 22, along the direction of motion of the trolley 24, for docking with the trolley track 23. When the platform 22 is in the upper position, the trolley 24 enters the trolley track 23, where it is blocked and positioned forward and backward by the check mechanism 1 and the blocking mechanism 2. When the platform 22 is lowered, the blocking mechanism 2 releases the forward block on the trolley 24, allowing the trolley 24 to pass through the trolley track 23 and enter the ground track.

[0029] In order to enable the loading trolley 24 to enter the trolley track 23, the non-return mechanism 1 and the blocking mechanism 2 block and position the loading trolley 24 forward and backward. After the lifting platform 22 descends, the blocking mechanism 2 releases the function of blocking the loading trolley 24 from moving forward. The following specific embodiments of the non-return mechanism 1 and the blocking mechanism 2 are provided:

[0030] Check mechanism 1

[0031] like Figure 2 As shown in Figure 3, the check mechanism 1 includes a check mechanism bracket 3; a check plate 4 hingedly connected to the check mechanism bracket 3, with a height difference between its front and rear sides; and a check frame 5 that cooperates with the check plate 4 to lower the higher side of the check plate 4, allowing the check plate 4 to rotate about its hinge point. The check mechanism bracket 3 includes a check mechanism base 3.1 and a check plate mounting seat 3.2. The check plate 4 is hingedly connected to the top of the check plate mounting seat 3.2. A lifting cylinder 12 is fixed to the check mechanism base 3.1, and the check plate mounting seat 3.2 is fixed to the piston rod of the lifting cylinder 12. The lifting cylinder 12 can adjust the height of the check mechanism bracket 3. A limit post 13 is fixed to the check plate mounting seat 3.2 to limit the downward movement of the lower side of the check plate 4 to an extreme position.

[0032] Blocking mechanism 2

[0033] like Figure 4As shown in FIG. 5 , the blocking mechanism 2 includes a blocking mechanism bracket 6, a blocking frame 7, a touch plate 8, and a blocking shaft 9 that can slide up and down and is disposed within the blocking mechanism bracket 6. The top of the blocking shaft 9 passes through the blocking mechanism bracket 6 and is connected to a blocking block 10 that can cooperate with the blocking frame 7 to limit the forward movement of the blocking frame 7. The bottom of the blocking shaft 9 passes through the blocking mechanism bracket 6 and is hingedly connected to a rotating shaft 11. The rotating shaft 11 can cooperate with the touch plate 8 to drive the blocking shaft 9 to slide downward. The blocking mechanism bracket 6 includes a blocking mechanism mounting seat 6.1, a blocking mechanism guide sleeve 6.2, and a blocking mechanism connecting rod 6.3. A sliding bushing 19 and a blocking shaft return spring 14 located above and coaxial with the sliding bushing 19 are fixed within the blocking mechanism guide sleeve 6.2. The blocking shaft 9 is coaxially disposed within the blocking shaft return spring 14. The top of the blocking shaft 9 passes through the blocking shaft reset spring 14 and is fixedly connected to a connecting plate 15 that cooperates with the blocking shaft reset spring 14 and is used to compress the blocking shaft reset spring 14 or withstand the reset force of the blocking shaft reset spring 14 to move the blocking shaft 9 upward and reset. A blocking block 10 is hingedly connected to the connecting plate 15, and a blocking block reset spring 16 is fixedly connected between the top of the blocking shaft 9 and the blocking block 10. The bottom of the blocking shaft 9 passes through the blocking mechanism guide sleeve 6.2 and is hingedly connected to one end of the rotating shaft 11. The middle part of the rotating shaft 11 is hingedly connected to the blocking mechanism connecting rod 6.3. The other end of the rotating shaft 11 is a cantilever structure for cooperating with the touch plate 8. A waist-shaped hole 17 is opened at one end of the rotating shaft 11 along its length. The bottom of the blocking shaft 9 is fixedly connected to an adjustment shaft 18 arranged in the waist-shaped hole 17. The cooperating structure of the adjustment shaft 18 and the waist-shaped hole 17 reduces the assembly requirements of the rotating shaft 11 and the blocking shaft 9. The touch plate 8 is arranged at an angle to the rotating shaft 11. The other end of the rotating shaft 11 can move downward and contact the upper surface of the touch plate 8. Through the contact between the upper surface of the touch plate 8 and the other end of the rotating shaft 11, the rotating shaft 11 is driven to rotate around its central hinge point, so that one end of the rotating shaft 11 drives the blocking shaft 9 to move downward. The touchpad 8 is arranged on the touchpad bracket 20, and the touchpad bracket 20 is fixed on the touchpad bracket fixing seat 21. The height of the touchpad bracket 20 can be adjusted by the structure of nuts and screws. The touchpad bracket 20 includes a bracket base plate 20.1, a touchpad adjustment plate 20.2 and a touchpad hinge seat 20.3. The bracket base plate 20.1 is fixed on the touchpad bracket fixing seat 21. The height of the bracket base plate 20.1 can be adjusted by the structure of nuts and screws. The touchpad hinge seat 20.3 is fixed to one side of the bracket base plate 20.1, and the bottom of the touchpad 8 is hingedly connected to the touchpad hinge seat 20.3. The touchpad adjustment plate 20.2 is an L-shaped plate structure, which is fixed to the other side of the bracket base plate 20.1. The height of the touchpad adjustment plate 20.2 can be adjusted by the structure of nuts and screws, thereby adjusting the angle between the touchpad 8 and the horizontal plane.

[0034] like Figure 1As shown, a blocking frame 7 and a non-return frame 5 are fixed to the front and rear sides of the loading trolley 24 respectively; a blocking mechanism bracket 6 and a non-return mechanism bracket 3 are fixed to the front and rear sides of the lifting platform 22 along the movement direction of the loading trolley 24; the front upper plate surface of the non-return plate 4 is located above the rear upper plate surface of the non-return plate 4, and the touch plate 8 is located below the lifting platform 22 and is fixed to the ground by a touch plate bracket 20 and a touch plate bracket fixing seat 21.

[0035] The working process of the present invention is as follows: when the lifting platform 22 is at a high position, the loading trolley 24 enters the lifting platform 22, as shown in FIG. Figure 2 As shown, the loading trolley 24 moves forward and first presses the non-return plate 4 of the non-return mechanism 1, and the non-return plate 4 tilts up. After the loading trolley passes, the non-return plate 4 returns to its original position by gravity, and the non-return mechanism 1 is activated. Figure 3 As shown, the tilted end of the check plate 4 limits the check frame 5 to prevent the loading trolley 24 from moving backward. After the loading trolley 24 passes through the check mechanism 1, it hits the blocking mechanism 2. Figure 4 As shown, the blocking block 10 of the blocking mechanism 2 interacts with the blocking frame 7 to prevent the trolley 24 from advancing. At this time, the trolley 24 is restricted in both the front and rear directions. When the lifting platform 22 descends from the high position to the low position, the cantilever end of the rotating shaft 11 touches the touch plate 8, the blocking shaft 9 descends, the blocking shaft return spring 14 is compressed, and the blocking block 10 descends below the blocking frame 7, allowing the trolley 24 to pass automatically. After the trolley 24 passes, the lifting platform 22 ascends, the cantilever end of the rotating shaft 11 disengages from the touch plate 8, and the blocking shaft return spring 14 pushes the blocking block 10 back to its original position, preventing the next trolley 24 from advancing.

[0036] In summary, the mechanism designed in the present invention consists of a non-return mechanism 1 and a blocking mechanism 2. The structure is relatively simple and compact, and it takes up little space. It can be easily installed in the lifting platform trolley system and is suitable for various working environments and space restrictions. The various components cooperate closely with each other, work reliably, and can adapt to lifting platform 22 trolleys of different specifications and loads, with strong versatility and applicability. There is a height difference between the front and back sides of the non-return plate 4 of the non-return mechanism 1, and it cooperates with the non-return frame 5. When the trolley has a tendency to retreat, the higher side of the non-return plate 4 is pressed down by the non-return frame 5 and rotates around the hinge point, thereby forming a blockage to ensure that the trolley will not retreat accidentally, thereby improving the safety and stability of operation. When the trolley moves forward normally, it can pass through the non-return plate 4 relatively smoothly without causing excessive obstruction to the operation of the trolley. The blocking mechanism 2 can prevent the trolley from moving forward: the blocking block 10 at the top of the blocking shaft 9 cooperates with the blocking frame 7 to limit the trolley's forward movement when needed, playing a precise limiting role, preventing the trolley from exceeding the specified position, and ensuring the accuracy of the work process. The rotating shaft 11 hingedly connected to the bottom of the blocking shaft 9 can cooperate with the touch panel 8. When the trolley needs to be released, the rotating shaft 11 is activated through a specific trigger mechanism, driving the blocking shaft 9 to slide downward, thereby driving the blocking block 10 to descend, realizing the smooth release of the trolley. This design responds quickly and can meet the needs of rapid release of the trolley in different work scenarios.

[0037] It should be noted here that the description of the above technical solutions is exemplary, and this specification can be embodied in different forms and should not be interpreted as being limited to the technical solutions set forth herein. On the contrary, providing these descriptions will make the disclosure of the present invention thorough and complete, and will fully convey the scope disclosed in this specification to those skilled in the art. In addition, the technical solution of the present invention is limited only by the scope of the claims. When using "including", "having" and "comprising" described in this specification, there may also be another part or other parts, and the terms used may generally be singular but may also represent plural forms. Finally, it should be pointed out that the above embodiments are only more representative examples of the present invention. Obviously, the present invention is not limited to the above embodiments, and there may be many variations. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention should be deemed to fall within the scope of protection of the present invention.

Claims

1. A mechanism for limiting and releasing a lifting platform trolley, characterized by: It comprises a non-return mechanism (1) arranged in a lifting platform loading trolley system for preventing the loading trolley (24) from moving backward and a blocking mechanism (2) for preventing the loading trolley (24) from moving forward; The non-return mechanism (1) comprises a non-return mechanism bracket (3); a non-return plate (4) hingedly connected to the non-return mechanism bracket (3) and having a height difference between the front and rear sides; and a non-return frame (5) cooperating with the non-return plate (4) and used to press down the higher side of the non-return plate (4) to enable the non-return plate (4) to rotate around its hinge point. The blocking mechanism (2) comprises a blocking mechanism bracket (6), a blocking frame (7), a touch plate (8) and a blocking shaft (9) which is arranged in the blocking mechanism bracket (6) and can slide up and down; the top of the blocking shaft (9) passes through the blocking mechanism bracket (6) and is connected to a blocking block (10) which can cooperate with the blocking frame (7) and limit the forward movement of the blocking frame (7); the bottom of the blocking shaft (9) passes through the blocking mechanism bracket (6) and is hingedly connected to a rotating shaft (11); the rotating shaft (11) can cooperate with the touch plate (8) to drive the blocking shaft (9) to slide downward.

2. The mechanism for limiting and releasing a lifting platform loading trolley according to claim 1, characterized in that: The non-return mechanism (1) further comprises a lifting device for adjusting the height of the non-return mechanism bracket (3); the non-return mechanism bracket (3) is fixed on the driving end of the lifting device.

3. The mechanism for limiting and releasing a lifting platform loading trolley according to claim 2, characterized in that: The lifting device comprises a lifting cylinder (12), and the non-return mechanism bracket (3) is fixed on the piston rod of the lifting cylinder (12).

4. The mechanism for limiting and releasing a lifting platform loading trolley according to claim 1, 2 or 3, characterized in that: A limiting structure for limiting the downward movement of the lower side surface of the non-return plate (4) is also fixed on the non-return mechanism bracket (3).

5. The mechanism for limiting and releasing a lifting platform loading trolley according to claim 1, characterized in that: A blocking shaft reset spring (14) is fixed in the blocking mechanism bracket (6), and the blocking shaft (9) is coaxially arranged in the blocking shaft reset spring (14). The top of the blocking shaft (9) passes through the blocking shaft reset spring (14) and is fixedly connected to a connecting plate (15) that cooperates with the blocking shaft reset spring (14) and is used to compress the blocking shaft reset spring (14) or withstand the reset force of the blocking shaft reset spring (14) to enable the blocking shaft (9) to move upward and reset.

6. The mechanism for limiting and releasing a lifting platform loading trolley according to claim 1 or 5, characterized in that: The top of the blocking shaft (9) is hingedly connected to the blocking block (10), and a blocking block return spring (16) is fixedly connected between the top of the blocking shaft (9) and the blocking block (10).

7. The mechanism for limiting and releasing a lifting platform loading trolley according to claim 1, characterized in that: The bottom of the blocking shaft (9) passes through the blocking mechanism bracket (6) and is hingedly connected to one end of the rotating shaft (11); the middle of the rotating shaft (11) is hingedly connected to the blocking mechanism bracket (6); and the other end of the rotating shaft (11) is a cantilever structure for cooperating with the touch panel (8).

8. The mechanism for limiting and releasing a lifting platform loading trolley according to claim 7, characterized in that: One end of the rotating shaft (11) is provided with a waist-shaped hole (17) along its length direction, and the bottom of the blocking shaft (9) is fixedly connected to an adjustment shaft (18) arranged in the waist-shaped hole (17).

9. The mechanism for limiting and releasing a lifting platform loading trolley according to claim 7, characterized in that: The touch plate (8) is arranged at an angle to the rotating shaft (11), and the other end of the rotating shaft (11) can move downward and contact the upper plate surface of the touch plate (8). The upper plate surface of the touch plate (8) contacts the other end of the rotating shaft (11), driving the rotating shaft (11) to rotate around its central hinge point, so that one end of the rotating shaft (11) drives the blocking shaft (9) to move downward.

10. An arrangement structure for a mechanism for limiting and releasing a lifting platform trolley, comprising a lifting platform (22), a trolley track (23) fixed on the lifting platform (22), and a trolley (24) arranged on the trolley track (23), characterized in that: It also includes the mechanism for limiting and releasing the lifting platform loading trolley as described in any one of the above claims 1 to 9, the blocking frame (7) and the non-return frame (5) are fixed on the front and rear sides of the loading trolley (24) respectively; the blocking mechanism bracket (6) and the non-return mechanism bracket (3) are fixed on the front and rear sides of the lifting platform (22) along the movement direction of the loading trolley (24); the front upper plate surface of the non-return plate (4) is located above the rear upper plate surface of the non-return plate (4), and the touch plate (8) is located below the lifting platform (22).

Images