Foldable level fixing device

Abstract

The utility model discloses a collapsible level fixing device, including the casing, the horizontal rotation is connected with the bearing plate in the casing, the side surface sliding connection limiting piece of casing, limiting piece penetrates casing, and with bearing plate intercalation, the top surface fixed connection adjusting part of bearing plate, the top surface sliding connection clamping piece of bearing plate, clamping piece with adjusting part screw connection. The utility model discloses by setting up the limiting piece who is by the connecting block, the locating pin and the first spring etc. component constitutes, and with bearing plate side's location groove cooperation, effectively solved the problem of easy closing of upper casing in prior art because of external force, this structure not only ensured the stability of casing under the unfolding state, prevented the closure of casing because of accidental collision or vibration, guaranteed the continuity and safety of surveying operation, and easy operation, only needs to pull the connecting block reversely when unlocking, greatly improved the convenience and reliability of equipment use.

Description

Technical Field

[0001] This utility model relates to the field of level technology, and in particular to a foldable level fixing device. Background Technology

[0002] A level is a commonly used measuring tool for small angles. In the machinery industry and instrument manufacturing, it is used to measure the angle of inclination relative to a horizontal position, the flatness and straightness of machine tool guideways, and the horizontal and vertical positions of installed equipment. Levels can be classified according to their shape as: universal levels, cylindrical levels, integrated levels, mini levels, camera levels, frame levels, and ruler levels; and according to the way the level is fixed as: adjustable levels and non-adjustable levels.

[0003] Patent publication number CN209814738U discloses a level fixing device, including a foldable housing and a fixing device located inside the housing. The fixing device is connected to the housing via an adjusting device. The fixing device includes a fixing plate and several support frames located on the fixing plate. The fixing plate is hollow, and the support frames are connected to the fixing plate via a rotating device located inside the fixing plate. The rotating device includes a rotating wheel, a rotating handle, and a moving rod. The moving rod includes a first moving rod and a second moving rod arranged centrally symmetrically. The rotating wheel is connected to the fixing plate via a rotating shaft, and the rotating handle is fixedly connected to the rotating shaft. The adjusting device includes several pulleys and connectors connecting the two ends of the fixing plate. The first connector is made of steel wire rope, and the second connector is made of elastic material. This device can effectively protect the level while improving transportation efficiency and the degree of protection for the level.

[0004] However, the patent relies on the opening and closing of the upper shell to pull the steel wire rope to realize the storage of the support frame. If the operation is too fast or the force is uneven, it may cause jamming or impact. In addition, the upper and lower shells lack a limiting structure when unfolding, making the upper shell easy to close on its own due to external forces. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a foldable level fixing device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a foldable level fixing device, comprising a housing, a bearing plate rotatably connected to the housing, a limiting member slidably connected to the side of the housing, the limiting member penetrating the housing and being inserted into the bearing plate, an adjusting member fixedly connected to the top surface of the bearing plate, and a clamping member slidably connected to the top surface of the bearing plate, the clamping member being threadedly connected to the adjusting member.

[0007] As a further description of the above technical solution: the clamping member includes two guide plates symmetrically slidably connected to the top surface of the bearing plate, two telescopic rods are horizontally fixed inside the guide plates, and an L-shaped plate is fixedly connected to the end of the telescopic rods. The guide plates are threadedly connected to the adjusting member.

[0008] As a further description of the above technical solution: the adjusting component includes two first support plates symmetrically fixed to the top surface of the bearing plate, a worm gear rotatably connected between the two first support plates, a knob coaxially fixed at the end of the worm gear, a worm wheel meshing with the outer circumference of the worm gear, a screw coaxially fixedly sleeved on the worm wheel, and second support plates rotatably connected to both ends of the screw. The second support plates are fixedly connected to the top surface of the bearing plate, and a guide rod is horizontally fixed between the two second support plates. The guide plate is slidably connected to the guide rod and threadedly connected to the screw.

[0009] As a further description of the above technical solution: the limiting member includes a connecting block slidably connected to the side of the housing, a handle fixedly connected to the side of the connecting block, two positioning pins horizontally and symmetrically fixedly connected to the inner side of the connecting block, two through holes horizontally and symmetrically opened on the side of the housing, the positioning pins slidingly passing through the through holes, and two positioning grooves horizontally and symmetrically opened on the side of the bearing plate, the positioning pins being inserted into the positioning grooves.

[0010] As a further description of the above technical solution: a first sliding groove is horizontally formed on the inner wall of the through hole, a first slider is slidably connected in the first sliding groove, the first slider is fixedly connected to the positioning pin, and a first spring is fixed together between the first sliding groove and the first slider.

[0011] As a further description of the above technical solution: the side of the bearing plate is horizontally fixed with a support shaft, the inner side of the housing is horizontally opened with a blind hole, and the support shaft is rotatably connected in the blind hole.

[0012] As a further description of the above technical solution: the telescopic rod includes a sleeve horizontally fixed inside the guide plate, a support rod slidably connected inside the sleeve, the support rod being horizontally fixed to the L-shaped plate, a second sliding groove being horizontally opened on the inner wall of the sleeve, a second slider being slidably connected inside the second sliding groove, the second slider being fixedly connected to the support rod, and a second spring being fixed together between the second sliding groove and the second slider.

[0013] This utility model has the following beneficial effects:

[0014] 1. Compared with existing technologies, this foldable level fixing device effectively solves the problem of the upper shell easily closing due to external force in existing technologies by setting a limiting component composed of a connecting block, a positioning pin, and a first spring, which cooperates with the positioning groove on the side of the support plate. When the shell is unfolded to the use state, the user can push the connecting block so that the positioning pin is stably inserted into the positioning groove of the support plate under the action of the spring, forming a reliable mechanical lock. This structure not only ensures the stability of the shell in the unfolded state and prevents the shell from closing due to accidental collisions or vibrations, thus ensuring the continuity and safety of measurement operations, but also makes the operation simple. Unlocking only requires pulling the connecting block in the opposite direction, which greatly improves the convenience and reliability of the equipment.

[0015] 2. Compared with existing technologies, this foldable level fixing device uses an adjusting component composed of a worm gear, worm wheel, screw, and guide rod to drive the clamping component, achieving a stable and synchronously symmetrical clamping and fixing of the level. Specifically, rotating the knob drives the worm gear to rotate, which in turn drives the meshing worm wheel and coaxial screw to rotate. This causes the two guide plates that are threaded with the screw to move in opposite directions along the guide rod. The telescopic rod drives the L-shaped plate to complete the clamping or releasing of the level. The worm gear mechanism has a reverse self-locking characteristic, which can effectively prevent the screw from reversing due to vibration during transportation or use, thereby avoiding the risk of clamping loosening. At the same time, the symmetrical transmission design ensures the balance of clamping force. Combined with the buffering effect provided by the second spring inside the telescopic rod, it can adapt to slight size changes and avoid damage to the level due to over-clamping, significantly improving the stability and safety of the level during fixing and transportation. Attached Figure Description

[0016] Figure 1 A perspective view of the overall structure of a foldable level fixing device proposed in this utility model;

[0017] Figure 2 This is a top sectional view showing the connection between the housing and the support plate of a foldable level fixing device proposed in this utility model.

[0018] Figure 3 This utility model proposes a foldable level fixing device. Figure 2 Enlarged view of the structure at point A in the middle.

[0019] Legend:

[0020] 1. Housing; 2. Support plate; 3. Knob; 4. First support plate; 5. Guide rod; 6. Connecting block; 7. Handle; 8. Second support plate; 9. Guide plate; 10. Screw; 11. Worm gear; 12. Worm wheel; 13. L-shaped plate; 14. Telescopic rod; 15. Support shaft; 16. Positioning groove; 17. Positioning pin; 18. First slider; 19. First spring; 20. First slide groove; 21. Through hole. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Reference Figures 1 to 3 The present invention provides a foldable level fixing device, comprising a housing 1, a bearing plate 2 rotatably connected to the housing 1, a horizontally fixed support shaft 15 on the side of the bearing plate 2, a blind hole horizontally opened on the inner side of the housing 1, the support shaft 15 rotatably connected in the blind hole, a limiting member slidably connected to the side of the housing 1, the limiting member passing through the housing 1 and inserted into the bearing plate 2, an adjusting member fixedly connected to the top surface of the bearing plate 2, and a clamping member slidably connected to the top surface of the bearing plate 2, the clamping member being threadedly connected to the adjusting member;

[0023] The limiting component includes a connecting block 6 slidably connected to the side of the housing 1, a handle 7 fixedly connected to the side of the connecting block 6, two positioning pins 17 horizontally and symmetrically fixedly connected to the inner side of the connecting block 6, two through holes 21 horizontally and symmetrically opened on the side of the housing 1, the positioning pins 17 slidingly passing through the through holes 21, two positioning grooves 16 horizontally and symmetrically opened on the side of the bearing plate 2, the positioning pins 17 being inserted into the positioning grooves 16, a first sliding groove 20 horizontally opened on the inner wall of the through holes 21, a first slider 18 slidably connected in the first sliding groove 20, the first slider 18 being fixedly connected to the positioning pins 17, and a first spring 19 being fixedly fixed between the first sliding groove 20 and the first slider 18.

[0024] The clamping component includes two guide plates 9 symmetrically slidably connected to the top surface of the bearing plate 2. Two telescopic rods 14 are horizontally fixed inside the guide plates 9. The ends of the telescopic rods 14 are fixedly connected to an L-shaped plate 13. The guide plates 9 are threadedly connected to the adjusting component.

[0025] The telescopic rod 14 includes a sleeve that is horizontally fixed inside the guide plate 9, a support rod that is slidably connected inside the sleeve, the support rod that is horizontally fixed to the L-shaped plate 13, a second sliding groove that is horizontally opened on the inner wall of the sleeve, a second slider that is slidably connected inside the second sliding groove, the second slider that is fixedly connected to the support rod, and a second spring that is fixed together between the second sliding groove and the second slider.

[0026] The adjusting component includes two first support plates 4 symmetrically fixed to the top surface of the bearing plate 2. The two first support plates 4 are rotatably connected to a worm gear 11. A knob 3 is coaxially fixed at the end of the worm gear 11. A worm wheel 12 meshes with the outer periphery of the worm gear 11. A screw 10 is coaxially fixedly sleeved on the worm wheel 12. The two ends of the screw 10 are rotatably connected to second support plates 8. The second support plates 8 are fixedly connected to the top surface of the bearing plate 2. A guide rod 5 is horizontally fixed between the two second support plates 8. A guide plate 9 is slidably connected to the guide rod 5 and threadedly connected to the screw 10.

[0027] Working principle: In use, firstly, pull handle 7 outwards. Handle 7 moves connecting block 6, which pulls positioning pin 17 out of positioning groove 16 on the side of bearing plate 2. At the same time, the first spring 19 is compressed. Then, the bearing plate 2 is flipped 180 degrees, causing the clamping parts on the bearing plate 2 to flip out of the housing 1. Then, release handle 7, and the compressed first spring 19 returns to its original position. When the spring returns to its original position, it drives positioning pin 17 back into positioning groove 16 on the side of bearing plate 2, limiting and fixing bearing plate 2. Next, place the level on bearing plate 2, between the two L-shaped plates 13. The user turns knob 3 clockwise, causing worm gear 11 to rotate. 11 meshes with worm gear 12, changing the direction of motion by 90 degrees and driving screw 10, which is coaxial with worm gear 12, to rotate. Since the two guide plates 9 are threadedly connected to screw 10 and are restricted to linear sliding by guide rod 5, when screw 10 rotates, the two guide plates 9 will move synchronously and towards each other along guide rod 5. The guide plates 9 push L-shaped plate 13 inward through telescopic rod 14 to clamp it from both sides of the level. After use, the positioning pin 17 is pulled out from positioning groove 16 again by handle 7, and then the bearing plate 2 is flipped so that the clamping parts on the bearing plate 2 are flipped back into the housing 1. Then the handle 7 is released so that the positioning pin 17 returns to positioning groove 16 to limit and fix the bearing plate 2.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A foldable level fixing device, comprising a housing (1), characterized in that: The housing (1) is horizontally rotatably connected to a bearing plate (2). The side of the housing (1) is slidably connected to a limiting member. The limiting member passes through the housing (1) and is inserted into the bearing plate (2). The top surface of the bearing plate (2) is fixedly connected to an adjusting member. The top surface of the bearing plate (2) is slidably connected to a clamping member. The clamping member is threadedly connected to the adjusting member. The limiting component includes a connecting block (6) slidably connected to the side of the housing (1), a handle (7) fixedly connected to the outside of the connecting block (6), two positioning pins (17) horizontally and symmetrically fixedly connected to the inside of the connecting block (6), two through holes (21) horizontally and symmetrically opened on the side of the housing (1), the positioning pins (17) slidingly passing through the through holes (21), and two positioning grooves (16) horizontally and symmetrically opened on the side of the bearing plate (2), the positioning pins (17) being inserted into the positioning grooves (16); The inner wall of the through hole (21) is horizontally provided with a first sliding groove (20), and a first slider (18) is slidably connected in the first sliding groove (20). The first slider (18) is fixedly connected to the positioning pin (17), and a first spring (19) is fixed together between the first sliding groove (20) and the first slider (18). The side of the bearing plate (2) is horizontally fixed with a support shaft (15), and a blind hole is horizontally opened on the inner side of the housing (1). The support shaft (15) is rotatably connected in the blind hole.

2. The foldable level fixing device according to claim 1, characterized in that: The clamping member includes two guide plates (9) symmetrically slidably connected to the top surface of the bearing plate (2). Two telescopic rods (14) are horizontally fixed inside the guide plates (9). An L-shaped plate (13) is fixedly connected to the end of the telescopic rods (14). The guide plates (9) are threadedly connected to the adjusting member.

3. The foldable level fixing device according to claim 2, characterized in that: The adjusting component includes two first support plates (4) symmetrically fixed to the top surface of the bearing plate (2). The two first support plates (4) are rotatably connected to a worm gear (11). The end of the worm gear (11) is coaxially fixed to a knob (3). The outer circumference of the worm gear (11) meshes with a worm wheel (12). The worm wheel (12) is coaxially fixed to a screw (10). The two ends of the screw (10) are rotatably connected to a second support plate (8). The second support plate (8) is fixedly connected to the top surface of the bearing plate (2). The two second support plates (8) are horizontally fixed to a guide rod (5). The guide plate (9) is slidably connected to the guide rod (5) and threadedly connected to the screw (10).

4. The foldable level fixing device according to claim 2, characterized in that: The telescopic rod (14) includes a sleeve that is horizontally fixed inside the guide plate (9). A support rod is slidably connected inside the sleeve. The support rod is horizontally fixed to the L-shaped plate (13). A second sliding groove is horizontally opened on the inner wall of the sleeve. A second slider is slidably connected inside the second sliding groove. The second slider is fixedly connected to the support rod. A second spring is fixed together between the second sliding groove and the second slider.

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