Lifting mechanism and X-ray machine

Abstract

The utility model belongs to the technical field of medical instruments, and discloses a lifting mechanism and an X-ray machine. The lifting mechanism comprises a base, a lead screw, a lead screw nut, a chain wheel, a chain and a nitrogen spring, the lead screw is rotationally connected to the base, the lead screw nut is in threaded connection with the lead screw, and a heavy object is hung on the chain; two ends of the nitrogen spring are respectively connected with the base and the lead screw nut; the base is further provided with a driving piece used for driving the lead screw and the chain wheel to rotate so as to lift the heavy object. The lead screw, the chain wheel and the chain are arranged on the base, and the lead screw is driven by the driving piece to drive the chain wheel to rotate synchronously so as to lift a heavy object hung on the chain; a lead screw nut and a nitrogen spring are arranged, the nitrogen spring is used for providing balance force, the force provided by the nitrogen spring can be balanced with the gravity of a heavy object, traditional gravity balance modes such as object balance weight and installation of an air cylinder or a hydraulic cylinder are replaced, the structure is simplified, space is saved, and the load of a driving part can be reduced; and the overall weight is not greatly increased.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a lifting mechanism and an X-ray machine. Background Art

[0002] In the medical field, X-ray machines are instruments that perform digital photographic diagnostics on various parts of the body for patients of different body shapes, body parts, and ages. During use, X-ray machines require movement, such as lifting and positioning, to adjust the imaging position.

[0003] In existing technology, the lifting mechanism of an X-ray machine must overcome gravity to lift and lower heavy objects. To reduce the load, two methods are commonly used to balance gravity: using physical counterweights or installing pneumatic or hydraulic cylinders to balance gravity. Using physical counterweights significantly increases the weight of the X-ray machine. Installing pneumatic cylinders requires an appropriate air source and pressure pipes, while installing hydraulic cylinders also requires a corresponding hydraulic station, making the structure more complex and occupying a large amount of space.

[0004] Therefore, there is an urgent need to provide a lifting mechanism and an X-ray machine with a simplified structure to achieve gravity balance without the need for physical counterweights or complex pressure pipes or hydraulic stations, thereby avoiding a significant increase in the weight of the X-ray machine and effectively saving space. Utility Model Content

[0005] The purpose of the utility model is to provide a lifting mechanism and an X-ray machine, which can achieve gravity balance with a simplified structure, without the need for physical counterweights or complex pressure pipes or hydraulic stations, thereby avoiding a significant increase in the weight of the X-ray machine and effectively saving space.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] The utility model provides a lifting mechanism, which comprises:

[0008] A base, a lead screw and a lead screw nut, wherein the lead screw is rotatably connected to the base, and the lead screw nut is threadedly connected to the lead screw;

[0009] A sprocket and a chain, wherein the sprocket is provided on the lead screw and can rotate synchronously with the lead screw, the chain is engaged with the sprocket, and a weight is suspended on the chain;

[0010] A nitrogen spring, with its two ends respectively connected to the base and the lead screw nut, is used to provide a balancing force for the lead screw nut; a driving member is also provided on the base, which is used to drive the lead screw and the sprocket to rotate to lift the heavy object.

[0011] As an optional technical solution of the lifting mechanism, two nitrogen springs are provided, and the two nitrogen springs are symmetrically arranged on both sides of the lead screw.

[0012] As an optional technical solution for the lifting mechanism, a guide groove is provided on the base, the guide groove extends along the axial direction of the lead screw, and the lead screw nut is partially slidably inserted into the guide groove.

[0013] As an optional technical solution for a lifting mechanism, the base includes a bracket and a support plate, the driving member and the lead screw are both arranged on the bracket, the support plate is detachably connected to the bracket, and the nitrogen spring is arranged on the support plate.

[0014] As an optional technical solution for the lifting mechanism, the axial direction of the nitrogen spring is parallel to the axial direction of the lead screw.

[0015] As an optional technical solution for the lifting mechanism, two sprockets are arranged at intervals, the two sprockets are respectively arranged at both ends of the lead screw, the nitrogen spring is located between the two sprockets, and the chain is arranged in a one-to-one correspondence with the sprockets.

[0016] As an optional technical solution for a lifting mechanism, the base is also provided with a guide rail and a sliding member slidingly arranged on the guide rail. The chain is connected to the sliding member, and the sliding member is used to fix the heavy object. The chain can drive the sliding member and the heavy object to move along the guide rail.

[0017] As an optional technical solution for a lifting mechanism, the base includes a bracket and two support seats, the driving member and the nitrogen spring are both arranged on the bracket, the screw is rotatably connected to the support seat, and the support seat is detachably arranged on the bracket.

[0018] As an optional technical solution for the lifting mechanism, it also includes a bearing, and the lead screw is rotatably connected to the support seat through the bearing.

[0019] The utility model provides an X-ray machine, which comprises the lifting mechanism.

[0020] Beneficial effects:

[0021] The utility model provides a lifting mechanism, which includes a base, a lead screw and a lead screw nut, a sprocket and a chain, and a nitrogen spring. The lead screw is rotatably connected to the base, the lead screw nut is threadedly connected to the lead screw, the sprocket is arranged on the lead screw and can rotate synchronously with the lead screw, the chain is meshed with the sprocket, and a weight is suspended on the chain; the two ends of the nitrogen spring are respectively connected to the base and the lead screw nut, which is used to provide a balancing force for the lead screw nut; the base is also provided with a driving member for driving the lead screw and sprocket to rotate to lift the weight. By arranging the lead screw, sprocket and chain on the base, the driving member drives the lead screw to drive the sprocket to rotate synchronously to lift the weight suspended on the chain; by arranging the lead screw nut and the nitrogen spring, the nitrogen spring provides a balancing force, and the force provided by the nitrogen spring can achieve balance with the weight of the weight itself, replacing traditional physical counterweights and gravity balancing methods such as installing cylinders or hydraulic cylinders, simplifying the structure and saving space, and reducing the load of the driving member without significantly increasing the overall weight.

[0022] The utility model provides an X-ray machine, which includes a lifting mechanism. By arranging the lifting mechanism with a nitrogen spring, gravity balance is achieved by using the nitrogen spring, and no other complex structures (such as pressure pipes or hydraulic stations, etc.) are required, thereby effectively saving occupied space. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of the first part of the lifting mechanism provided by an embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the second part of the structure of the lifting mechanism provided by the embodiment of the utility model;

[0025] Figure 3 It is a cross-sectional view of the lifting mechanism provided by an embodiment of the utility model;

[0026] Figure 4 It is a schematic structural diagram of the third part of the lifting mechanism provided by the embodiment of the utility model.

[0027] In the picture:

[0028] 10. Base; 11. Bracket; 111. Guide groove; 112. Guide rail; 12. Support plate; 13. First support base; 14. Second support base;

[0029] 21. Lead screw; 22. Lead screw nut; 23. First bearing; 24. Second bearing;

[0030] 31. Sprocket; 32. Chain; 33. Sliding member;

[0031] 40. Nitrogen spring; 50. Driving part; A. Heavy object. DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0033] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0034] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0035] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0036] like Figures 1 to 4As shown, this embodiment provides a lifting mechanism and an X-ray machine, which includes a lifting mechanism; the lifting mechanism includes a base 10, a screw 21 and a screw nut 22, a sprocket 31 and a chain 32 and a nitrogen spring 40, the screw 21 is rotatably connected to the base 10, the screw nut 22 is threadedly connected to the screw 21, the sprocket 31 is arranged on the screw 21 and can rotate synchronously with the screw 21, the chain 32 is engaged with the sprocket 31, and a heavy object is hung on the chain 32; the two ends of the nitrogen spring 40 are respectively connected to the base 10 and the screw nut 22, for providing a balancing force for the screw nut 22; a driving member 50 is also provided on the base 10, for driving the screw 21 and the sprocket 31 to rotate to lift the heavy object.

[0037] By arranging a lead screw 21, a sprocket 31 and a chain 32 on the base 10, the lead screw 21 is driven by the driving member 50 to drive the sprocket 31 to rotate synchronously, so as to lift the heavy object suspended on the chain 32; by arranging the lead screw nut 22 and the nitrogen spring 40, the nitrogen spring 40 is used to provide a balancing force, and the force provided by the nitrogen spring 40 can achieve a balance with the gravity of the heavy object itself, replacing the traditional physical counterweight and the installation of gravity balancing methods such as cylinders or hydraulic cylinders. By arranging a lifting mechanism with a nitrogen spring 40, gravity balance is achieved by using the nitrogen spring 40, and there is no need to equip other complex structures (such as pressure pipes or hydraulic stations, etc.), which effectively saves space, can reduce the load of the driving member 50, and will not cause a substantial increase in the overall weight.

[0038] Specifically, taking weight A as an example, if the traditional physical counterweight method is adopted, weight A needs to be hung at one end of the chain 32, and an object of the same weight as weight A needs to be hung at the other end of the chain 32 to achieve gravity balance, which is not convenient for actual operation and application; if the traditional pneumatic weight balancing method is adopted, an air cylinder needs to be installed, and the gravity is balanced by the force generated by the cylinder piston rod, so an air source and a pressure pipe need to be equipped; if the traditional hydraulic weight balancing method is adopted, a hydraulic cylinder needs to be installed, and the gravity is balanced by the force generated by the hydraulic cylinder piston rod, so a hydraulic station needs to be equipped, which makes the overall structure complicated and occupies a large space.

[0039] Compared to the above traditional methods of balancing gravity, this embodiment uses a nitrogen spring 40 to balance gravity, without the need for additional complex structures or components. The nitrogen spring 40 is a sealed device that can store gas, sealing the high-pressure gas inside the nitrogen spring 40 and ensuring stable storage. During the use of the lifting mechanism, the lead of the screw 21 is smaller than the diameter of the sprocket 31. Within the travel range of the nitrogen spring 40, the weight A can have a larger lifting height, and the nitrogen spring 40 can provide a relatively stable force to ensure the stability of the lifting of the weight A. The internal structure and working principle of the nitrogen spring 40 are prior art and will not be repeated here.

[0040] Furthermore, the base 10 includes a bracket 11 and a support plate 12. The driving member 50 and the lead screw 21 are both disposed on the bracket 11. The support plate 12 is detachably connected to the bracket 11. The nitrogen spring 40 is disposed on the support plate 12. By providing a detachable bracket 11 and support plate 12, the position of the support plate 12 can be easily adjusted to change the installation position of the nitrogen spring 40.

[0041] Optionally, the nitrogen spring 40 is detachably connected to the support plate 12. In this embodiment, one end of the nitrogen spring 40 is bolted to the support plate 12, and the other end is bolted to the lead screw nut 22. The driver 50 may be a motor. Providing a detachable nitrogen spring 40 on the support plate 12 facilitates maintenance or replacement of the nitrogen spring 40, such as polishing the plunger rod, replacing seals or valves, and cleaning the interior.

[0042] Furthermore, the axial direction of the nitrogen spring 40 is parallel to the axial direction of the lead screw 21. When setting up the nitrogen spring 40, attention should be paid to the axial direction of the plunger rod of the nitrogen spring 40 to ensure that the axial direction of the plunger rod is parallel to the axial direction of the lead screw 21. This allows the nitrogen spring 40 to operate smoothly during operation, avoids unbalanced loading caused by non-parallel axes, and prevents the plunger rod from being subjected to lateral forces. If the plunger rod is subjected to lateral forces, it is easy to cause deformation of the plunger rod or the internal sealing structure, resulting in problems such as jamming or leakage, affecting the normal use of the nitrogen spring 40.

[0043] To ensure that the force of the nitrogen spring 40 is evenly applied to the lead screw nut 22, two nitrogen springs 40 are provided, symmetrically arranged on either side of the lead screw 21. The symmetrical arrangement of the two nitrogen springs 40 not only provides a greater force, thereby increasing the range of gravity balance, but also ensures that the force applied to the lead screw nut 22 is evenly applied, helping to ensure the service life of the lead screw nut 22.

[0044] In this embodiment, the bracket 11 has a horizontal top surface, the support plate 12 is an L-shaped plate, and the bottom surface of the support plate 12 is arranged in contact with the horizontal top surface of the bracket 11; the end of the nitrogen spring 40 is fixed to the side of the support plate 12, and the nitrogen spring 40 extends in the horizontal direction. The two nitrogen springs 40 are arranged side by side in the horizontal direction and are respectively located on both sides of the screw 21.

[0045] Furthermore, the bracket 11 is provided with a guide groove 111 extending along the axis of the lead screw 21. The lead screw nut 22 is partially slidably inserted into the guide groove 111. The guide groove 111 guides and restricts the movement of the lead screw nut 22, protecting the plunger rod of the nitrogen spring 40 from lateral forces. In this embodiment, the lead screw nut 22 is provided with a protruding guide portion, the outer surface of which slides with the inner wall of the guide groove 111; the guide groove 111 is a through hole extending vertically through the bracket 11.

[0046] To mount the lead screw 21 on the base 10, the base 10 further includes two support blocks, both of which are detachably mounted on the bracket 11. The lead screw 21 is rotatably connected to the support blocks. In this embodiment, the two support blocks are a first support block 13 and a second support block 14. The lead screw 21 extends horizontally, with one end of the lead screw 21 connected to the first support block 13 and the other end of the lead screw 21 connected to the second support block 14. Both the first support block 13 and the second support block 14 are secured to the bracket 11 via bolts.

[0047] To reduce friction loss, the lifting mechanism also includes bearings, through which the lead screw 21 is rotatably connected to the support base. In this embodiment, the lifting mechanism includes a first bearing 23 and a second bearing 24. One end of the lead screw 21 is mounted on the first support base 13 via the first bearing 23, and the other end of the lead screw 21 is mounted on the second support base 14 via the second bearing 24.

[0048] To limit the position of the lead screw 21, the first bearing 23 is an angular contact bearing, and the second bearing 24 is a ball bearing; two first bearings 23 are arranged side by side. By installing the angular contact bearings and ball bearings, the lead screw 21 is mounted with one end fixed and the other supported. This allows one end of the lead screw 21 to be fixed to the first support seat 13 and the other end to be supported by the second support seat 14. This helps compensate for length changes in the lead screw 21 caused by temperature fluctuations or installation errors.

[0049] In other embodiments, a single or multiple angular contact bearings can be selected according to the model of the angular contact bearing, and a suitable installation method (such as back-to-back pairing, face-to-face pairing installation, etc. in the prior art) can be selected to achieve the fixation and support of the screw 21.

[0050] Optionally, two sprockets 31 are provided at intervals, one at each end of the lead screw 21, the other at each end of the lead screw 21, the nitrogen spring 40 is located between the two sprockets 31, and the chains 32 are provided in a one-to-one correspondence with the sprockets 31. By configuring the sprockets 31 at both ends of the lead screw 21, a dual-chain transmission system is formed using the two sprockets 31 and the chain 32, which can provide greater traction, and each chain 32 shares the load, reducing the load of a single chain 32; thus, the smooth lifting and lowering of the heavy object A can be ensured, which helps to enhance stability and reduce shaking; even if one of the chains 32 fails, the other chain 32 can continue to operate, ensuring the safety of the lifting operation.

[0051] Furthermore, the base 10 is provided with a guide rail 112 and a slider 33. The slider 33 is slidably disposed on the guide rail 112. The chain 32 is connected to the slider 33. The slider 33 is used to fix the weight A. The chain 32 can drive the slider 33 and the weight A to move along the guide rail 112. By providing the guide rail 112 on the base 10 and the slider 33 that is slidably engaged with the guide rail 112, the guide rail 112 serves as a guide during the lifting of the weight A, thereby helping to ensure the stability of the lifting of the weight A.

[0052] In this embodiment, two guide rails 112 are arranged side by side at intervals, and both guide rails 112 extend in the vertical direction; the sliding member 33 includes four sliders and four limit blocks, each two sliders form a group, and the two sliders in each group cooperate with one guide rail 112 and are connected by a chain 32; the limit blocks are connected to the sliders or the chain 32, each two limit blocks form a group, and the two limit blocks in each group are used to be set at the top and bottom ends of the weight A respectively, and the weight A can be fixed to the limit blocks by bolts.

[0053] By providing a slider and a limit block, the weight A is fixed to the limit block, and the chain 32 drives the slider and the limit block to move. The two limit blocks cooperate to drive the weight A, thereby causing the weight A to be raised and lowered along the guide rail 112. In this embodiment, and in other embodiments, the sliding member 33 may also include four sliders and a fixed member, with each two sliders forming a group, and the two sliders in each group cooperate with one guide rail 112. The four sliders are all connected to the fixed member, and the top and bottom ends of the fixed member are both connected to the chain 32. The weight A is fixed to the fixed member, so that the chain 32 can drive the fixed member to move, thereby driving the slider to slide on the guide rail 112, thereby completing the lifting and lowering of the weight A.

[0054] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Lifting mechanism, characterized in that: include: A base (10), a lead screw (21) and a lead screw nut (22), wherein the lead screw (21) is rotatably connected to the base (10), and the lead screw nut (22) is threadedly connected to the lead screw (21); A sprocket (31) and a chain (32), wherein the sprocket (31) is arranged on the lead screw (21) and can rotate synchronously with the lead screw (21), the chain (32) is engaged with the sprocket (31), and a heavy object is hung on the chain (32); A nitrogen spring (40) has two ends respectively connected to the base (10) and the lead screw nut (22), and is used to provide a balancing force for the lead screw nut (22); a driving member (50) is also provided on the base (10), and is used to drive the lead screw (21) and the sprocket (31) to rotate so as to lift the heavy object.

2. The lifting mechanism according to claim 1, characterized in that: Two nitrogen springs (40) are provided, and the two nitrogen springs (40) are symmetrically arranged on both sides of the lead screw (21).

3. The lifting mechanism according to claim 1, characterized in that: A guide groove (111) is provided on the base (10), and the guide groove (111) extends along the axial direction of the lead screw (21), and the lead screw nut (22) is partially slidably inserted into the guide groove (111).

4. The lifting mechanism according to claim 1, characterized in that: The base (10) comprises a bracket (11) and a support plate (12); the driving member (50) and the lead screw (21) are both arranged on the bracket (11); the support plate (12) is detachably connected to the bracket (11); and the nitrogen spring (40) is arranged on the support plate (12).

5. The lifting mechanism according to claim 1, characterized in that: The axial direction of the nitrogen spring (40) is parallel to the axial direction of the lead screw (21).

6. The lifting mechanism according to claim 1, characterized in that: Two sprockets (31) are arranged at intervals, and the two sprockets (31) are respectively arranged at the two ends of the lead screw (21). The nitrogen spring (40) is located between the two sprockets (31), and the chain (32) is arranged in a one-to-one correspondence with the sprockets (31).

7. The lifting mechanism according to claim 1, wherein: The base (10) is further provided with a guide rail (112) and a sliding member (33) slidably arranged on the guide rail (112); the chain (32) is connected to the sliding member (33); the sliding member (33) is used to fix the weight; and the chain (32) can drive the sliding member (33) and the weight to move along the guide rail (112).

8. The lifting mechanism according to claim 1, characterized in that: The base (10) comprises a bracket (11) and two support seats, the driving member (50) and the nitrogen spring (40) are both arranged on the bracket (11), the lead screw (21) is rotatably connected to the support seats, and the support seats are detachably arranged on the bracket (11).

9. The lifting mechanism according to claim 8, characterized in that: It also includes a bearing, and the lead screw (21) is rotatably connected to the support seat via the bearing.

10. X-ray machine, characterized in that The invention comprises a lifting mechanism as described in any one of claims 1 to 9.

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