Labor-saving device with automatic contraction coil spring

Abstract

The utility model discloses a labor-saving device with an automatic contraction coil spring, which relates to the technical field of lifting equipment and is used for being mounted in a frame of an engineering truck, an arm-holding sliding block is arranged in the frame, the labor-saving device comprises an arm-holding stretching belt, a coil spring mechanism and a coil spring stretching belt, the coil spring mechanism is arranged in the frame, one end of the coil spring stretching belt is connected with the coil spring mechanism, and the other end of the coil spring stretching belt is connected with the arm-holding sliding block. The other end of the coil spring stretching belt is connected with one end of the holding arm stretching belt, and the other end of the holding arm stretching belt is connected with the holding arm sliding block. According to the utility model, through the arrangement of the embracing arm stretching belt, the coil spring mechanism and the coil spring stretching belt, upward pulling force can be provided for the embracing arm sliding block, the stress of the screw rod is reduced, and the service life is prolonged; and meanwhile, the force required by an operator to rotate the hand-cranking wheel can be reduced, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a lifting device technical field, especially to a labor saving device with automatic contraction coil spring. BACKGROUND

[0002] The engineering vehicle used in the semiconductor testing link is divided into manual version and electric version, wherein the manual version is as shown in the figure Figure 1 The engineering vehicle is manually shaken through the side hand wheel to drive the synchronous pulley, the synchronous pulley drives the screw rod reducer, the screw rod on the screw rod reducer rotates to drive the engineering vehicle arm to move up and down, and the screw rod reducers on the two sides are connected synchronously through a shaft.

[0003] The manual version engineering vehicle in the prior art has the following technical defects: the transmission initial end terminal reduction ratio is quite different, and the engineering vehicle holds the equipment which is relatively heavy, so that the operator needs to rotate the hand wheel for a long time with great force. INVENTION CONTENTS

[0004] The utility model discloses a labor saving device with automatic contraction coil spring, which is used to solve the above technical problems.

[0005] The utility model adopts the technical scheme as follows:

[0006] A labor saving device with automatic contraction coil spring is used to be installed in the frame of the engineering vehicle, the frame is provided with an arm holding sliding block, and comprises an arm holding stretching belt, a coil spring mechanism and a coil spring stretching belt.

[0007] As a preferred, a rolling shaft is further included, the upper end of the frame is provided with the rolling shaft, and the coil spring stretching belt is connected with the arm holding stretching belt and passes through the rolling shaft.

[0008] As a preferred, the coil spring mechanism comprises a coil spring mounting frame and a coil spring, the coil spring mounting frame is internally provided with a plurality of coil springs, and one end of the coil spring stretching belt is connected with the coil spring.

[0009] As a further preferred, the coil spring mounting frame comprises a coil spring fixing plate, a cover plate and a backing plate, one end of the coil spring fixing plate is provided with the cover plate, the other end of the coil spring fixing plate is provided with the backing plate, and the coil spring fixing plate is internally provided with the coil spring.

[0010] As a further preferred, a plurality of first threaded holes are formed in the cover plate, and a plurality of second threaded holes are formed in the backing plate.

[0011] As preferred, the arm embracing stretching belt fixing member is further included, and the other end of the arm embracing stretching belt is connected with the arm embracing sliding block through the arm embracing stretching belt fixing member.

[0012] As preferred, the arm embracing stretching belt fixing member is further included, and the other end of the arm embracing stretching belt is connected with the arm embracing sliding block through the arm embracing stretching belt fixing member.

[0013] As preferred, the arm embracing stretching belt fixing member is further included, and the other end of the arm embracing stretching belt is connected with the arm embracing sliding block through the arm embracing stretching belt fixing member.

[0014] The above technical scheme has the following advantages or beneficial effects:

[0015] In the utility model, the arm embracing stretching belt, the coil spring mechanism and the coil spring stretching belt are arranged, the arm embracing sliding block can be provided with upward tension, the force borne by the screw rod is reduced, the service life is improved, the force required for the operator to rotate the hand wheel is also reduced, and the work efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic view of an engineering vehicle in the prior art;

[0017] Figure 2 is an exploded schematic view of the coil spring mechanism in the utility model;

[0018] Figure 3 is a structural schematic view of the coil spring mechanism in the utility model applied to an engineering vehicle Figure 1 ;

[0019] Figure 4 is a structural schematic view of the coil spring mechanism in the utility model applied to an engineering vehicle Figure 2 .

[0020] In the figure: 1, vehicle frame; 2, arm embracing sliding block; 3, arm embracing stretching belt; 4, coil spring mechanism; 401, coil spring mounting frame; 402, coil spring; 403, coil spring fixing plate; 404, cover plate; 405, pad plate; 406, coil spring stretching belt fixing member; 407, fixing shaft; 408, coil spring stretching belt; 5, rolling shaft; 6, arm embracing stretching belt fixing member. DETAILED DESCRIPTION

[0021] The technical scheme of the utility model will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0022] In the description of the utility model, it needs to explain, if appearing the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on, the indicated direction or position relation of the drawing is based on the direction or position relation, is only for the convenience of describing the utility model and simplifying the description, and is not indicated or implied that the indicated device or element must have a particular direction, constructs and operates with a particular direction, therefore cannot be understood as the limitation to the utility model. In addition, if appearing the term "first", "second", "third" is only for the description purpose, and cannot be understood as indicating or implying the relative importance.

[0023] In the description of the utility model, it needs to explain, unless another explicit provision and limitation, if appearing the term "installation", "connection", "connect" should do the broad sense, for example, can be fixed connection, can be detachable connection, or integrally connected, can be mechanical connection, can be electrical connection, can be directly connected, can be indirectly connected through the intermediate medium, can be the intercommunication of two elements. For ordinary skilled in the art, the above-mentioned terms can be understood in the specific meaning in the utility model according to the specific circumstances.

[0024] Referring to Figure 1 As shown in the figure, the prior art engineering vehicle includes frame 1 and arm embracing sliding block 2 arranged in the two sides of frame 1, the arm embracing sliding block 2 is connected with the arm embracing, the arm embracing sliding block 2 is connected with the screw rod, the synchronous pulley is driven by the hand drive hand wheel, the synchronous pulley drives the screw rod reducer, the screw rod on the screw rod reducer rotates and drives the arm embracing of the engineering vehicle to move up and down, and the two sides of the screw rod reducer are connected synchronously through a shaft. When the arm embracing places heavy objects, the structure needs to use larger force to rotate the hand wheel, which is time-consuming and laborious and low in efficiency.

[0025] Referring to Figures 2-4 As shown in the figure, the utility model discloses a labor-saving device with automatic contraction coil spring, which is arranged in the frame 1 of the engineering vehicle, the frame 1 is provided with arm embracing sliding block 2, comprising arm embracing stretching belt 3, coil spring mechanism 4 and coil spring stretching belt 408, the frame 1 is provided with coil spring mechanism 4, one end of the coil spring stretching belt 408 is connected with the coil spring mechanism 4, the other end of the coil spring stretching belt 408 is connected with one end of the arm embracing stretching belt 3, and the other end of the arm embracing stretching belt 3 is connected with the arm embracing sliding block 2. In the embodiment, referring to Figure 3As shown, the coil spring mechanism 4 is provided with at least two, and distributed on both sides of the frame 1, each coil spring 402 structure can be at least 40KG arm sliding block 2 to provide a pulling force, can be set according to the number of coil spring mechanism 4, the number of coil spring mechanism 4 needs to be even. In this embodiment, the coil spring mechanism 4 is preferably provided with two, which can provide at least 80KG pulling force for the arm sliding block 2, and can rotate the hand wheel with smaller force, which can improve the work efficiency, save time and labor, and can reduce the force on the screw rod, and improve the service life.

[0026] Further, as a preferred embodiment, it further comprises a rolling shaft 5, the upper end of the frame 1 is provided with a rolling shaft 5, and the coil spring tension belt 408 is connected with the arm tension belt 3 and passes around the rolling shaft 5. Referring to Figure 3 As shown, the rolling shaft 5 is provided with four in total, and the specific number can be set according to the need, and two rolling shafts 5 are arranged on the upper end of each side of the frame 1. One end of the rolling shaft 5 extends out of the frame 1, and the fixed shaft 407 is rotatably connected with the frame 1, and the two rolling shafts 5 are arranged side by side, and the coil spring tension belt 408 and the arm tension belt 3 pass around the two rolling shafts 5. The coil spring mechanism 4 can apply a pulling force to the arm tension belt 3, so that the arm tension belt 3 pulls the arm sliding block 2 to apply a pulling force to the arm sliding block 2.

[0027] Further, as a preferred embodiment, the coil spring mechanism 4 comprises a coil spring mounting frame 401 and a coil spring 402, and a plurality of coil springs 402 are arranged in the coil spring mounting frame 401. One end of the coil spring 402 is connected with the coil spring tension belt 408. In this embodiment, at least two coil springs 402 are arranged in each coil spring mounting frame 401, and the number of coil springs 402 can be set according to the need. Referring to Figure 2 As shown, four coil springs 402 are arranged in the coil spring mounting frame 401 in this embodiment, and the coil springs 402 are connected with the coil spring tension belt 408 to apply a pulling force to the coil spring tension belt 408.

[0028] Further, as a preferred embodiment, the coil spring mounting frame 401 comprises a coil spring fixing plate 403, a cover plate 404 and a backing plate 405. One end of the coil spring fixing plate 403 is provided with the cover plate 404, the other end of the coil spring fixing plate 403 is provided with the backing plate 405, and the coil spring 402 is arranged in the coil spring fixing plate 403. Referring to Figure 2 As shown, the coil spring fixing plate 403 and the backing plate 405 can be connected by bolts, the coil spring fixing plate 403 and the backing plate 405 can be connected by bolts or welding, the coil spring fixing plate 403 can be provided with a fixed shaft 407 for mounting the coil spring 402, the coil spring 402 can be sleeved on the fixed shaft 407, and the coil spring 402 can be limited on the fixed shaft 407 by cooperating with the cover plate 404. The upper end of the coil spring fixing plate 403 is provided with an opening for the coil spring tension belt 408 to pass through.

[0029] Further, as a preferred embodiment, a plurality of first threaded holes are formed on the cover plate 404, and a plurality of second threaded holes are formed on the backing plate 405. First screws are arranged in the first threaded holes, and second screws are arranged in the second threaded holes. The first screws are used to connect the cover plate 404 and the coil spring fixing plate 403 together, and the second screws are used to connect the backing plate 405, the coil spring fixing plate 403 and the frame 1 together. In this embodiment, a connecting lug is arranged at the bottom of the coil spring fixing plate 403 or the cover plate 404, and the connecting lug is connected to the frame 1 by a screw. In this way, the stable connection between the coil spring mounting frame 401 and the frame 1 can be achieved, and the shaking of the coil spring mounting frame 401 can be avoided.

[0030] Further, as a preferred embodiment, the coil spring tension belt fixing member 406 is further included. Each coil spring 402 is correspondingly provided with a coil spring tension belt 408, and the coil spring tension belts 408 are connected by the coil spring tension belt fixing member 406. As shown in Figure 2 , the coil spring tension belt fixing member 406 can be provided with one or a plurality of members, which are arranged according to the needs. If one coil spring tension belt fixing member 406 is arranged, the coil spring tension belt fixing member 406 needs to connect the other ends of all the coil spring tension belts 408 together. If a plurality of coil spring tension belt fixing members 406 are arranged, each coil spring tension belt fixing member 406 can connect the other ends of two or more adjacent coil spring tension belts 408 together. The coil spring tension belt fixing member 406 does not cross the rolling shaft 5. When the coil spring tension belt fixing member 406 touches the rolling shaft 5, it means that the armrest sliding block 2 has been lowered to the initial position or raised to the highest position. For example, when the coil spring tension belt fixing member 406 is located outside the two rolling shafts 5, as shown in the state of Figure 4 , the armrest sliding block 2 has been lowered to the initial position. When the coil spring tension belt fixing member 406 is located between the two rolling shafts 5, as shown in the direction of Figure 3 , when the coil spring tension belt fixing member 406 touches the left rolling shaft 5, the armrest sliding block 2 has been raised to the highest position. When the coil spring tension belt fixing member 406 touches the right rolling shaft 5, the armrest sliding block 2 has been lowered to the initial position. In this embodiment, the coil spring tension belt fixing member 406 is preferably arranged outside the rolling shaft 5. The coil spring 402 is connected to the armrest sliding block 2 through the coil spring tension belt 408 and the armrest tension belt 3. The armrest sliding block 2 is threadedly connected to the lead screw. When the lead screw rotates, it drives the armrest sliding block 2 to move linearly up and down. The inner side of the frame 1 is provided with a guide rail, and the armrest sliding block 2 is slidably connected to the guide rail.

[0031] In this embodiment, the structures of the coil spring tension belt fixing member 406 and the armrest tension belt fixing member 6 can be referred to Figure 2 .

[0032] Further, as a preferred embodiment, the arm-holding stretching belt fixing member 6 is further included, and the other end of the arm-holding stretching belt 3 is connected with the arm-holding sliding block 2 through the arm-holding stretching belt fixing member 6. The arm-holding stretching belt fixing member 6 and the arm-holding sliding block 2 are fixed through bolt or screw connection.

[0033] In use, the coil spring 402 is contracted to pull the coil spring stretching belt 408, the coil spring stretching belt 408 pulls the arm-holding stretching belt 3, the arm-holding stretching belt 3 pulls the arm-holding sliding block 2 to provide upward pulling force for the arm-holding sliding block 2, so that the hand wheel can drive the lead screw to drive the arm-holding sliding block 2 to lift only by small force of the support, time and labor are saved, and work efficiency is improved. When the arm-holding sliding block 2 is lowered, the arm-holding stretching belt 3 is pulled to pull the coil spring stretching belt 408, the coil spring stretching belt 408 pulls the coil spring 402 to make the coil spring 402 elongate to provide pulling force for the next lifting of the arm-holding sliding block 2.

[0034] The above is only a preferred embodiment of the present application, and does not limit the implementation and protection scope of the present application. For those skilled in the art, it should be realized that any equivalent replacement and obvious change obtained by applying the content of the present application should be included in the protection scope of the present application.

Claims

1. A labor-saving device with an automatic contraction coil spring, which is installed in the frame of an engineering vehicle, wherein a holding arm slider is arranged in the frame, characterized in that, The frame is internally provided with a coil spring mechanism, one end of a coil spring stretching belt is connected with the coil spring mechanism, the other end of the coil spring stretching belt is connected with one end of an arm embracing stretching belt, and the other end of the arm embracing stretching belt is connected with an arm embracing sliding block.

2. The power saver with an automatic shrink spring as claimed in claim 1, wherein The frame is further provided with a rolling shaft at the upper end, and the coil spring stretching belt is connected with the arm embracing stretching belt and passes around the rolling shaft.

3. The power saver with an automatic collapsing coil spring of claim 1, wherein, The coil spring mechanism comprises a coil spring mounting frame and coil springs, the coil spring mounting frame is internally provided with a plurality of coil springs, and the coil springs are connected with one end of the coil spring stretching belt.

4. The power saver with an automatic collapsing coil spring as claimed in claim 3, wherein, The coil spring mounting frame comprises a coil spring fixing plate, a cover plate and a backing plate, one end of the coil spring fixing plate is provided with the cover plate, the other end of the coil spring fixing plate is provided with the backing plate, and the coil spring fixing plate is internally provided with the coil springs.

5. The power saver with an automatic collapsing coil spring as claimed in claim 4, wherein, A plurality of first threaded holes are formed in the cover plate, and a plurality of second threaded holes are formed in the backing plate.

6. The power saver with an automatic collapsing coil spring of claim 1, wherein, The coil spring stretching belt is further provided with a coil spring stretching belt fixing member, each coil spring is correspondingly provided with the coil spring stretching belt, and a plurality of coil spring stretching belts are connected through the coil spring stretching belt fixing member.

7. The power saver with an automatic collapsing coil spring of claim 1, wherein, The arm embracing stretching belt is further provided with an arm embracing stretching belt fixing member, and the other end of the arm embracing stretching belt is connected with the arm embracing sliding block through the arm embracing stretching belt fixing member.

8. The power saver with an automatic collapsing coil spring of claim 1, wherein, The coil spring mechanism is provided with at least two coil spring mechanisms and is distributed on both sides of the frame.

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