A portable overload self-limiting lifting and pushing door machine

Abstract

The utility model relates to an overload self-limiting portable lifting hand-push door machine in the field of crane technology, comprising a main beam equipped with a hoist, both ends of the main beam are provided with support legs extending downward, both ends of the bottom of the support legs are provided with wheel assemblies, the wheel assembly comprises a support frame, the support frame is provided with a spring telescopic rod, the lower end of the spring telescopic rod is provided with a wheel extending to the bottom of the support leg; the utility model can be adaptively adjusted according to the ground conditions to make the wheel rise and fall, so that the main beam can move smoothly on uneven ground. At the same time, when the weight of the heavy object lifted by the hoist is overloaded, the contraction of the spring telescopic rod can make the support leg touch the ground, and the hand-push door machine cannot move at this time, further improving safety.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to an overload self-limiting portable lifting hand-pushing door crane. Background Art

[0002] At present, the commonly used lifting and pushing door operators in the market, such as the mobile crane with automatic weight limit function disclosed in the Chinese patent with publication number CN202880700U, mainly focus on the lifting function of the hoist, and lack the function of overload self-limiting. When the load exceeds the carrying capacity, it is easy to cause damage to the machine and even endanger the personal safety of the operator.

[0003] In addition, the support leg structure design is relatively simple, usually using an integral support form that contacts the ground. This design can certainly provide stable support, but it cannot adapt well to temporary outdoor handling sites (the working conditions are relatively complex and the handling is changeable).

[0004] For this reason, we designed the overload self-limiting portable lift door operator. Utility Model Content

[0005] In order to overcome the deficiencies in the background technology, the utility model discloses an overload self-limiting portable lifting hand-pushing door operator.

[0006] In order to achieve the above utility model purpose, the utility model adopts the following technical solutions:

[0007] A portable overload self-limiting lifting hand-pushing door machine includes a main beam equipped with a hoist, wherein both ends of the main beam are provided with support legs extending downward, and both ends of the bottom of the support legs are provided with wheel assemblies, and the wheel assembly includes a support frame, and the support frame is provided with a spring telescopic rod, and the lower end of the spring telescopic rod is provided with a wheel whose bottom extends to below the support leg.

[0008] Preferably, an adjusting screw is provided on the upper end surface of the spring telescopic rod, and the adjusting screw penetrates the support frame and is correspondingly connected to the support frame.

[0009] Preferably, the top of the support frame body has an extension portion extending horizontally toward a side away from the support leg, and the bottom surface of the extension portion is provided with the spring telescopic rod.

[0010] Preferably, the supporting legs include a ladder frame, a column is provided on the top edge of the ladder frame, and the upper end of the column is connected to the corresponding end of the main beam.

[0011] Preferably, a plurality of insertion holes are evenly spaced along the length direction of the column on the outer side surface.

[0012] Preferably, the upright column is slidably disposed on the top edge of the ladder frame.

[0013] Preferably, a pin capable of matching with the socket is horizontally penetrated through the side of the top edge of the ladder frame.

[0014] Preferably, the supporting leg further comprises a winch arranged on one side of the ladder frame, and the outer end of the winch rope passes through the corresponding top of the ladder frame side and the bottom of the column in sequence and is correspondingly connected to the top of the other side of the ladder frame.

[0015] Preferably, a pulley cooperating with a winch rope is provided at the top of one side of the ladder frame corresponding to the winch and at the bottom of the column.

[0016] Due to the adoption of the above-mentioned technical solution, the utility model has the following beneficial effects:

[0017] 1. The setting of the spring telescopic rod can be adjusted adaptively according to the ground conditions to make the wheels rise and fall, so that the main beam can move smoothly on the uneven ground. At the same time, when the weight of the hoisted object is overloaded, the contraction of the spring telescopic rod can make the supporting legs touch the ground. At this time, the hand-pushing door operator cannot move, which further improves safety;

[0018] 2. The column can be slidably installed on the top edge of the ladder frame, and the connection and adjustment can be carried out through the sockets evenly spaced along the outside of the column and the pins horizontally installed on the side of the top edge of the ladder frame, so as to realize the free adjustment of the height of the supporting legs and meet the support requirements of different occasions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the support legs in the utility model;

[0021] Figure 3 It is a structural schematic diagram of the wheel assembly in the utility model.

[0022] In the figure: 1. main beam; 2. supporting leg; 21. ladder frame; 22. column; 221. socket; 23. latch; 24. capstan; 25. pulley; 3. wheel assembly; 31. supporting frame; 311. extension; 32. spring telescopic rod; 33. wheel; 34. adjusting screw; 4. hoist. DETAILED DESCRIPTION

[0023] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", etc. to indicate directions or positional relationships, they only correspond to the drawings of the present application, in order to facilitate the description of the present invention; it should be understood that if there are terms such as "end", "side", "end part", "lateral", "lateral", "transverse", "longitudinal", etc. to indicate directions or positional relationships, they only correspond to the length and width of the corresponding parts, that is, "end part" indicates the head and tail areas in the length direction of the corresponding part, and "side part" indicates the head and tail areas in the width direction of the corresponding part; this is for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific direction.

[0024] Embodiment 1, in combination with the attached Figure 1 , 3 A portable overload self-limiting lifting hand-pushing door machine includes a main beam 1 equipped with a hoist 4. According to needs, the hoist 4 can be an electric hoist or a hand-pulled hoist, without specific limitation.

[0025] Both ends of the main beam 1 are provided with support legs 2 extending downward, and both ends of the bottom of the support legs 2 are provided with wheel assemblies 3. The wheel assembly 3 includes a support frame 31, and the support frame 31 is provided with a spring telescopic rod 32. The lower end of the spring telescopic rod 32 is provided with a wheel 33 whose bottom extends to the bottom of the support leg 2; specifically, the wheel 33 has a wheel bracket and a wheel body. As needed, the wheel 33 can adopt a universal wheel; the setting of the universal wheel can conveniently change the walking direction of the hand-push door machine. That is, the setting of the spring telescopic rod 32 can be adaptively adjusted according to the ground conditions so that the wheel rises and falls, thereby allowing the main beam to move smoothly on uneven ground. At the same time, when the weight of the heavy object lifted by the hoist 4 is overloaded, the contraction of the spring telescopic rod 32 can make the support leg 2 touch the ground, and the hand-push door machine cannot move at this time, further improving safety.

[0026] Furthermore, an adjusting screw 34 is disposed on the upper end surface of the spring telescopic rod 32 , and the adjusting screw 34 penetrates the support frame 31 and is correspondingly connected to the support frame 31 .

[0027] As required, the adjusting screw 34 can be threadedly matched with the support frame 31. As required, the adjusting screw 34 can also be threadedly connected with nuts at positions above and below the support frame 31.

[0028] As required, the top of the support frame 31 has an extension portion 311 extending horizontally to the side away from the support leg 2, and the bottom surface of the extension portion 311 is provided with a spring telescopic rod 32. At this time, the adjustment screw 34 can be threadedly matched with the extension portion 311. As required, it can also be that the adjustment screw 34 is threadedly connected with nuts at the positions above and below the extension portion 311.

[0029] Embodiment 2, combined with the attached Figure 2 , an overload self-limiting portable lifting hand push door machine, based on the first embodiment, the support leg 2 includes a ladder frame 21, and the ladder frame 21 adopts an isosceles trapezoidal structure as needed. A column 22 is penetrated on the top edge of the ladder frame 21, and the upper end of the column 22 is connected to the corresponding end of the main beam 1.

[0030] Furthermore, the support leg 2 can also adopt a non-fixed structure. The height and stability can be flexibly adjusted as needed. The column 22 is slidably inserted into the top edge of the ladder frame 21, and a plurality of sockets 221 are evenly spaced on the outer side of the column 22 along its length. A latch 23 that can match the socket 221 is horizontally inserted into the side of the top edge of the ladder frame 21; that is, the column can be slidably inserted into the top edge of the ladder frame, and connected and adjusted through the sockets evenly spaced along the outer side of the column and the latch horizontally inserted into the side of the top edge of the ladder frame, so as to realize free adjustment of the height of the support leg and meet the support requirements of different occasions. That is, by cooperating with the sockets 221 at different positions, the column 22 is at different heights, and then the main beam 1 is at different heights.

[0031] Furthermore, in order to facilitate the adjustment of the height of the column 22, the support leg 2 also includes a winch 24 provided on one side of the ladder frame 21, and the outer end of the winch 24 rope passes through the corresponding top of the side of the ladder frame 21 and the bottom of the column 22 in sequence and is correspondingly connected to the top of the other side of the ladder frame 21. The top of one side of the ladder frame 21 and the bottom of the column 22 corresponding to the winch 24 are both provided with a pulley 25 that cooperates with the winch 24 rope. It should be noted that the winch 24 is a device of the prior art, and its specific structure will not be repeated here.

[0032] The column 22 can be efficiently lifted and adjusted by the winch 24 and the pulley 25. The working principle is as follows: the winch rope of the winch 24 passes through the top of one side of the ladder frame 21, the bottom of the column 22 and is connected to the top of the other side. The rope can be pulled by rotating the bearing of the winch to raise the height of the column 22. Specifically, the pulleys 25 respectively arranged at the top of the ladder frame 21 and the bottom of the column 22 can reduce the pulling force on the winch, reduce the torque required for lifting, and make the operation easier.

[0033] As required, the top of the side of the ladder frame 21 away from the winch 24 can also be provided with a pulley 25 that cooperates with the winch 24 rope. At this time, the outer end of the winch 24 rope can pass around the pulley 25 and then be fixed in a suitable position.

[0034] As required, a rope threading hole for the winch 24 to pass through is provided at the position where the pulley 25 is installed on the side of the ladder frame 21, and the pulley 25 is installed at the lower edge of the corresponding rope threading hole.

[0035] As required, the pulleys 25 on the same supporting leg 2 are located on the same vertical plane.

[0036] As required, a groove for installing the corresponding pulley 25 can be opened on the lower end surface of the column 22.

[0037] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and it is intended that all changes that fall within the meaning and scope of equivalent elements are included in the present invention.

Claims

1. An overload self-limiting portable lifting door operator, comprising a main beam (1) equipped with a hoist (4), wherein both ends of the main beam (1) are provided with support legs (2) extending downward, and both ends of the bottom of the support legs (2) are provided with wheel assemblies (3), characterized in that: The wheel assembly (3) comprises a support frame (31), the support frame (31) is provided with a spring telescopic rod (32), and the lower end of the spring telescopic rod (32) is provided with a wheel (33) whose bottom extends to below the support leg (2).

2. The overload self-limiting portable lifting and pushing door operator according to claim 1 is characterized in that: An adjusting screw (34) is provided on the upper end surface of the spring telescopic rod (32); the adjusting screw (34) penetrates the support frame (31) and is correspondingly connected to the support frame (31).

3. The overload self-limiting portable lifting and pushing door operator according to claim 1 is characterized in that: The top of the support frame (31) has an extension portion (311) extending horizontally towards a side away from the support leg (2), and the bottom surface of the extension portion (311) is provided with the spring telescopic rod (32).

4. The overload self-limiting portable lifting and pushing door operator according to claim 1 is characterized in that: The supporting leg (2) comprises a ladder frame (21), a column (22) is provided on the top edge of the ladder frame (21), and the upper end of the column (22) is connected to the end of the corresponding main beam (1).

5. The overload self-limiting portable lifting and pushing door operator according to claim 4 is characterized in that: The outer side surface of the upright column (22) is provided with a plurality of insertion holes (221) at even intervals along the length direction thereof.

6. The overload self-limiting portable lifting and pushing door operator according to claim 5 is characterized in that: The upright column (22) is slidably arranged on the top edge of the ladder frame (21).

7. The overload self-limiting portable lifting and pushing door operator according to claim 6 is characterized in that: A latch pin (23) capable of matching with the insertion hole (221) is horizontally penetrated through the top side of the ladder frame (21).

8. The overload self-limiting portable lifting and pushing door operator according to claim 6 or 7, characterized in that: The support leg (2) further comprises a winch (24) arranged on one side of the ladder frame (21), wherein the outer end of the winch rope of the winch (24) sequentially passes over the top of the corresponding side of the ladder frame (21), the bottom of the column (22), and is correspondingly connected to the top of the other side of the ladder frame (21).

9. The overload self-limiting portable lifting and pushing door operator according to claim 8 is characterized in that: A pulley (25) that cooperates with a rope of the capstan (24) is provided at the top of one side of the ladder frame (21) corresponding to the capstan (24) and at the bottom of the column (22).

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