Height limiting device of scissor type ladder truck

Abstract

The utility model relates to a scissor type ladder truck height limiting device. The device comprises a fixed rod; the lifting rod is connected to the fixed rod in a sliding manner; the limiting device is connected with the lifting rod, an inductive head is arranged on the limiting device, the extending direction of the inductive head is the same as the sliding direction of the lifting rod, and one end of the inductive head exceeds or is flush with the end, away from the fixed rod, of the lifting rod; according to the scissor type ladder truck, the fixing rod, the lifting rod and the limiting stopper are vertically and additionally arranged on the guardrail of the scissor type ladder truck, lifting adjustment is carried out on the fixing rod according to the height of a worker, and it is ensured that the height of an inductive head of the limiting stopper exceeds the height of the worker; the limiting device inductive head can make contact with a roof firstly, when the inductive head makes contact with the roof, the scissor type ladder truck automatically stops ascending and descending, and the worker is prevented from colliding with the roof.

Description

Technical Field

[0001] The present application relates to the technical field of scissor-type aerial platforms, and in particular to a height limiting device for scissor-type aerial platforms. Background Art

[0002] The scissor-type aerial platform is a widely used special equipment for aerial work. It is used to transport workers to higher places to work. Its scissor-type mechanical structure makes the lifting platform have higher stability after lifting. The wide working platform and higher carrying capacity make the aerial work range larger and suitable for multiple people to work at the same time, which greatly improves the work efficiency of aerial work.

[0003] Workers working indoors stand on a scissor-type ladder. When the scissor-type ladder is lifting, if the workers do not pay attention to the height, they may hit the roof, causing safety hazards such as squeezing, collision, etc. Summary of the invention

[0004] The embodiment of the present application provides a height limiting device for a scissor-type aerial platform to solve the problem in the related art that the scissor-type aerial platform is raised and causes workers to collide with the roof.

[0005] In a first aspect, a height limiting device for a scissor-type aerial platform is provided, which comprises:

[0006] A fixing rod, on which a connecting piece is provided, and the connecting piece is used to connect the scissor-type aerial platform guardrail and the fixing rod;

[0007] A lifting rod, the lifting rod is slidably connected to the fixed rod;

[0008] The limiter is connected with the lifting rod, and a sensing head is arranged on the limiter. The extending direction of the sensing head is the same as the sliding direction of the lifting rod, and one end of the sensing head exceeds or is flush with the end of the lifting rod away from the fixed rod.

[0009] In some embodiments, the stopper is connected to one end of the lifting rod.

[0010] In some embodiments, a cylindrical cavity is provided in the fixing rod, one end of the lifting rod is located in the cavity, a plurality of splints are provided in the cavity, the plurality of splints are arranged around the cavity, the splints are slidably connected in the cavity, and when the splints are close to the lifting rod, the lifting rod is clamped and fixed.

[0011] In some embodiments, a plurality of position-limiting components are further included, and the position-limiting components include a telescopic member and a supporting member;

[0012] The telescopic member is connected to the clamping plate, the supporting member is connected to the inner wall of the cavity, and the telescopic member is slidably connected to the supporting member.

[0013] In some embodiments, a control assembly is further disposed in the cavity, and the control assembly includes a rotating wheel and a plurality of first springs;

[0014] The first spring is arranged between the splint and the inner wall of the cavity, the rotating wheel is rotatably connected in the cavity, there are several adjustment areas on the side wall of the rotating wheel, the several adjustment areas correspond to the several splints one by one, the splints are tightly attached to the adjustment area, and the distance from the side wall of the adjustment area to the center of the rotating wheel gradually increases.

[0015] In some embodiments, the control assembly further comprises a connecting rod;

[0016] The connecting rod is connected with the rotating wheel, and the connecting rod extends in the direction in which the lifting rod extends out of the cavity to form a boss.

[0017] In some embodiments, an opening for inserting the lifting rod is provided at one end of the cavity, and the boss is rotatably connected to the edge of the opening.

[0018] The embodiment of the present application provides a height limit device for a scissor-type aerial platform. Since the present application vertically installs a fixed rod on the guardrail of the scissor-type aerial platform, the lifting rod and the limiter are adjusted on the fixed rod according to the height of the staff to ensure that the height of the sensor head of the limiter exceeds the height of the staff. Therefore, when the scissor-type aerial platform starts to rise and fall, the sensor head of the limiter will touch the roof before the staff. When the sensor head touches the roof, the scissor-type aerial platform automatically stops rising and falling to prevent the staff from colliding with the roof. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 A schematic diagram of the structure of a scissor-type aerial platform provided in an embodiment of the present application;

[0021] Figure 2 A schematic diagram of the structure provided for an embodiment of the present application;

[0022] Figure 3 A structural cross-sectional view provided for an embodiment of the present application;

[0023] Figure 4 for Figure 3 A magnified view of the structure at center;

[0024] Figure 5 for Figure 3 Enlarged view of the structure at point B in the middle.

[0025] In the figure: 1. fixing rod; 2. connecting part; 3. lifting rod; 4. limiter; 5. induction head; 6. cavity; 7. clamp; 8. limit assembly; 81. telescopic part; 82. supporting part; 9. control assembly; 91. rotating wheel; 92. first spring; 93. connecting rod; 94. boss. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0027] The embodiment of the present application provides a height limiting device for a scissor-type aerial platform, which can solve the problem in the related art that the scissor-type aerial platform is raised and causes workers to collide with the roof.

[0028] See also Figures 1 to 5 , a height limiting device for a scissor-type aerial platform, comprising:

[0029] A fixing rod 1 is provided with a connecting piece 2, which is used to connect the scissor-type climbing vehicle guardrail and the fixing rod 1. The connecting piece 2 is welded to the fixing rod 1, and the connecting piece 2 is connected to the scissor-type climbing vehicle guardrail by bolts. The guardrail of the scissor-type climbing vehicle is surrounded by a rectangle, and a height limit device is installed at each of the four corners of the guardrail of the scissor-type climbing vehicle. Figure 1 As shown, it can effectively avoid that the worker first touches the roof due to the uneven roof, resulting in the failure to realize the protection function of the limiter 4.

[0030] The lifting rod 3 is slidably connected to the fixed rod 1. The lifting rod 3 moves on the fixed rod 1 along the length direction of the lifting rod 3. When the height limit device is installed, when the lifting rod 3 slides on the fixed rod 1, the lifting rod 3 will drive the limiter 4 to rise and fall;

[0031] A limiter 4 is connected to the lifting rod 3. A sensor head 5 is provided on the limiter 4. The extension direction of the sensor head 5 is the same as the sliding direction of the lifting rod 3, and one end of the sensor head 5 exceeds or is flush with the end of the lifting rod 3 away from the fixed rod 1. When the sensor head 5 is squeezed, the limiter 4 will send a command to control the scissors-type aerial platform to stop lifting. Four height limit devices are installed on the guardrail of the scissors-type aerial platform. The limiters 4 in the four height limit devices are connected in series through wiring, that is, when the sensor head 5 of any one of the limiters 4 touches the roof, the scissors-type aerial platform will be controlled to stop lifting.

[0032] The limiter 4 is connected to one end of the lifting rod 3. The limiter 4 is fixed at one end of the lifting rod 3 to maximize the use of the length of the lifting rod 3, that is, the highest roof height that the sensor head 5 can contact is reached to the highest, thereby increasing the protective height of the height limit device.

[0033] A cylindrical cavity 6 is provided in the fixing rod 1, one end of the lifting rod 3 is located in the cavity 6, a plurality of splints 7 are provided in the cavity 6, the plurality of splints 7 are arranged around the cavity 6, the splints 7 are slidably connected in the cavity 6, when the splints 7 are close to the lifting rod 3, the lifting rod 3 is clamped and fixed, the number of the splints 7 is three, and a non-slip pad is adhered to one side of the splints 7 facing the cavity 6, the three splints 7 are evenly distributed around the inner wall of the cavity 6 in the cavity 6, when the three splints 7 move toward the center of the cavity 6 to enclose the lifting rod 3, the position of the lifting rod 3 is fixed, when the three splints 7 move toward the outer wall of the cavity 6, the staff is required to hold the lifting rod 3 and adjust the height position of the lifting rod 3.

[0034] It also includes a plurality of limit assemblies 8, the limit assemblies 8 include a telescopic member 81 and a supporting member 82;

[0035] The telescopic member 81 is connected to the clamping plate 7, the support member 82 is connected to the inner wall of the cavity 6, and the telescopic member 81 is slidably connected on the support member 82. The structure of the telescopic member 81 and the support member 82 is as follows: Figure 4 As shown, the telescopic member 81 is restricted in the support member 82 and can only move horizontally toward or away from the center of the cavity 6. Two limit assemblies 8 are installed on each splint 7. The two limit assemblies 8 are vertically installed on one splint 7, and the two limit assemblies 8 are respectively located at the two ends of the splint 7. When the length of the splint 7 is too long, it is ensured that the splint 7 as a whole moves toward or away from the center of the cavity 6.

[0036] A control assembly 9 is also provided in the cavity 6, and the control assembly 9 includes a rotating wheel 91 and a plurality of first springs 92;

[0037] The first spring 92 is arranged between the splint 7 and the inner wall of the cavity 6, and the rotating wheel 91 is rotatably connected in the cavity 6. There are several adjustment areas on the side wall of the rotating wheel 91, and the several adjustment areas correspond to the several splints 7 one by one. The splint 7 is tightly attached to the adjustment area, and the distance from the side wall of the adjustment area to the center of the rotating wheel 91 gradually increases.

[0038] The number of the first springs 92 is the same as the number of the limit assemblies 8. The first springs 92 are installed between the telescopic member 81 and the support member 82. Figure 4 As shown, through the elastic force of the first spring 92, the clamping plate 7 will always be clamped toward the center of the cavity 6 without the need for manual force;

[0039] In order to facilitate the subsequent setting of the connecting rod 93 and the position adjustment of the lifting rod 3 in the fixed rod 1, the rotating wheel 91 is installed at the bottom center of the cavity 6. Figure 5 As shown, the elastic force of the first spring 92 is utilized to make the clamp 7 always adhere to the outer side of the rotating wheel 91. When the clamp 7 clamps the lifting rod 3, the distance from the close contact point between the clamp 7 and the side wall of the rotating wheel 91 to the center of the rotating wheel 91 is L1. The rotating wheel 91 is rotated. During the rotation of the rotating wheel 91, the close contact point between the clamp 7 and the outer side of the rotating wheel 91 moves. At this time, the distance from the close contact point between the outer side of the rotating wheel and the center of the rotating wheel 91 is L2. L1 is smaller than L2. Therefore, the distance from the clamp 7 to the center of the rotating wheel 91 becomes larger, that is, the distance from the clamp 7 to the center of the cavity 6 becomes larger. The clamp 7 moves toward the outer wall of the cavity 6, and the clamp 7 releases the lifting rod 3 from the clamping lifting rod 3.

[0040] The control assembly 9 also includes a connecting rod 93;

[0041] The connecting rod 93 is connected to the rotating wheel 91 , and the connecting rod 93 extends in a direction in which the lifting rod 3 extends out of the cavity 6 , and forms a boss 94 .

[0042] An opening for inserting the lifting rod 3 is provided at one end of the cavity 6, and the boss 94 is rotatably connected to the edge of the opening.

[0043] The boss 94 is located at the edge of the opening. Figure 4 As shown, the boss 94 is near the guardrail of the scissor-type aerial platform, which is convenient for the staff to operate. By controlling the boss 94 to rotate, the rotating wheel 91 rotates, and then the position of the clamping plate 7 is controlled, because one end of the connecting rod 9 lifting rod 3 is connected to the boss 94, and the other end is connected to the rotating wheel 91. When the boss 94 rotates, the boss 94 can drive the connecting rod 9 lifting rod 3 to rotate synchronously, and then drive the rotating wheel 91 to rotate synchronously through the connecting rod 9 lifting rod 3. Therefore, when the rotating wheel 91 rotates, it can drive the clamping plate 7 away from or close to the lifting rod 3, and then control the clamping plate 7 to clamp or release the lifting rod 3.

[0044] The installation of the height limit device is to first fix the fixed rod 1 and the limit assembly 8, the clamping plate 7, and the control assembly 9 therein to the guardrail of the scissor-type aerial platform through the connecting piece 2, and then install the limiter 4 at one end of the lifting rod 3, and the induction head 5 is located on the side away from the lifting rod 3, and then drive the three clamping plates 7 to move toward the inner wall of the cavity 6 by rotating the boss 94, and then insert the other end of the lifting rod 3 into the fixed rod 1 at a certain depth according to the height of the staff, and finally release the boss 94, and under the elastic force of the first spring 92, the three clamping plates 7 clamp the lifting rod 3 to complete the installation of the height limit device;

[0045] After the lifting rod 3 is fixed, the height of the sensing head 5 should be higher than the height of the staff to ensure that the sensing head 5 touches the roof before the staff. Then repeat the above operation and install four height limit devices at other positions of the guardrail of the scissors-type aerial platform. After all the height limit devices are installed, the four height limit devices are connected in series through wiring. When the sensing head 5 of any one of the limiters 4 touches the roof, the scissors-type aerial platform will be controlled to stop lifting, thereby preventing the staff from hitting the roof.

[0046] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0047] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0048] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. The height limit device of the scissor type aerial platform is characterized in that: include: A fixing rod (1) on which a connecting piece (2) is provided, wherein the connecting piece (2) is used to connect the scissor-type aerial platform guardrail and the fixing rod (1); A lifting rod (3), wherein the lifting rod (3) is slidably connected to the fixed rod (1); A limiter (4), the limiter (4) is connected to the lifting rod (3), and a sensor head (5) is provided on the limiter (4), the extension direction of the sensor head (5) is the same as the sliding direction of the lifting rod (3), and one end of the sensor head (5) exceeds or is flush with the end of the lifting rod (3) away from the fixed rod (1).

2. The height limiting device of the scissor-type aerial platform according to claim 1, characterized in that: The stopper (4) is connected to one end of the lifting rod (3).

3. The height limiting device of the scissor-type aerial platform according to claim 1, characterized in that: A cylindrical cavity (6) is provided in the fixing rod (1), one end of the lifting rod (3) is located in the cavity (6), a plurality of clamping plates (7) are provided in the cavity (6), the plurality of clamping plates (7) are arranged around the cavity (6), the clamping plates (7) are slidably connected in the cavity (6), and when the clamping plates (7) are in close contact with the lifting rod (3), the lifting rod (3) is clamped and fixed.

4. The height limiting device of the scissor-type aerial platform according to claim 3, characterized in that: It also includes a plurality of position limiting components (8), wherein the position limiting components (8) include a telescopic component (81) and a supporting component (82); The telescopic member (81) is connected to the clamping plate (7), the supporting member (82) is connected to the inner wall of the cavity (6), and the telescopic member (81) is slidably connected to the supporting member (82).

5. The height limiting device of the scissor-type aerial platform according to claim 3, characterized in that: A control assembly (9) is also provided in the cavity (6), and the control assembly (9) comprises a rotating wheel (91) and a plurality of first springs (92); The first spring (92) is arranged between the clamp (7) and the inner wall of the cavity (6), and the rotating wheel (91) is rotatably connected to the cavity (6). There are a plurality of adjustment areas on the side wall of the rotating wheel (91), and the plurality of adjustment areas correspond to a plurality of clamps (7) one by one. The clamps (7) are tightly attached to the adjustment areas, and the distance from the side wall of the adjustment area to the center of the rotating wheel (91) gradually increases.

6. The height limiting device of the scissor-type aerial platform according to claim 5, characterized in that: The control assembly (9) further comprises a connecting rod (93); The connecting rod (93) is connected to the rotating wheel (91), and the connecting rod (93) extends in the direction in which the lifting rod (3) extends out of the cavity (6), and forms a boss (94).

7. The height limiting device of the scissor-type aerial platform according to claim 6, characterized in that: An opening for inserting the lifting rod (3) is provided at one end of the cavity (6), and the boss (94) is rotatably connected to the edge of the opening.

Images