Spring self-balancing device
By designing a spring self-balancing device with a split-type tie rod and guide sleeve structure, the mechanical gap problem when the straightening roller and the reducer rotate relative to each other in the steel pipe cold straightening machine is solved, and the balance effect of energy saving and structural stability is achieved.
Patent Information
- Application Number
- CN202323623312.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-28
- Publication Date
- 2024-12-06
- Estimated Expiration
- 2033-12-28
AI Technical Summary
The existing spring balancers cannot meet the dual needs of relative rotational movement between the straightening roller and the reducer in the steel pipe cold straightening machine and the elimination of mechanical connection gaps, resulting in structural damage or high energy consumption.
A spring self-balancing device is designed. Through a split-type tie rod and guide sleeve structure, the elastic force generated by the compression spring is transmitted to the tie rod to ensure that the balanced members are always close to each other, and the elastic force is adjusted with the adjustment bolt, which is suitable for relatively rotating members.
It realizes the elimination of mechanical connection gaps under relative rotation conditions, reduces energy consumption, simplifies energy supply pipelines, and reduces construction costs and time.
Smart Images
Figure CN222122083U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of spring balancers and relates to a spring self-balancing device. Background Art
[0002] In the metallurgical industry, many equipment have heavy actuators and high loads, which leads to connection gaps in some of its internal components when it is in working state, resulting in uneven profit distribution of the components and reducing the bearing capacity of the components. For example, in the cold straightening machine for steel pipes, the straightening rollers of the straightening machine are connected to the reducer, and the lifting height of the straightening rollers is adjusted by adjusting the rotation parameters of the output shaft of the reducer. During the adjustment process, connection gaps are likely to appear between the mechanical parts on the straightening rollers and the output shaft of the reducer. A balancing mechanism is usually set to reduce or eliminate the mechanical connection gap. For this type of equipment, a balancer based on a hydraulic cylinder or a pneumatic cylinder is usually used to generate a balancing force. Although the mechanical structure of this type of balancer is relatively simple, compressed gas is usually used to drive such equipment, so it is also necessary to set up an air pump, a pump station or an intermediate piping device to make the equipment have a large energy consumption during operation.
[0003] The prior art has proposed some spring balancers, but most of them are set for two balanced components that perform linear motion, especially for two balanced components that tend to move away from each other in a straight line. The elastic force generated when the spring is compressed is used to offset the pulling force in opposite directions applied to the balancer when the two components move away from each other, so that the two balanced components tend to move closer to each other, thereby achieving the purpose of eliminating the mechanical gap between the two balanced components.
[0004] In addition to the linear reciprocating motion of the straightening rollers of the steel pipe cold straightening machine when the height is raised or lowered, the horizontal arrangement angle of the straightening rollers also needs to be adjusted frequently according to the production situation. That is, there is also a relative rotational motion relationship between the straightening rollers and the output shaft of the reducer. If the existing balancer is directly applied to two mechanisms that will rotate relative to each other, the rotation of the connecting rod will cause the spring on it to twist, causing structural damage to the spring. It can be seen that the existing technology cannot be applied to equipment where the two balanced mechanisms rotate relative to each other, and cannot simultaneously meet the dual requirements of "avoiding structural gaps" and "allowing relative rotation." Utility Model Content
[0005] In view of this, the purpose of the utility model is to provide a spring self-balancing device to provide a balancing pulling force for two components that rotate relative to each other, so that the two balanced components tend to approach each other, thereby eliminating the mechanical connection gap between the two.
[0006] In order to achieve the above-mentioned object, the utility model provides a spring self-balancing device, comprising a first pull rod and a second pull rod connecting a first balanced component and a second balanced component.
[0007] Optionally, the spring self-balancing device further comprises a guide sleeve, on which an inner hole arranged along its axial direction is formed. The first pull rod is rotatably inserted into the inner hole from the first end of the guide sleeve, and the second pull rod is fixedly connected to the second end of the guide sleeve opposite to the first end. The guide sleeve is provided with an anti-rotation pressure plate sliding along the side wall of the inner hole, and one end of the first pull rod located in the guide sleeve is rotatably connected to the anti-rotation pressure plate.
[0008] Optionally, the compression spring is sleeved on the first pull rod, one end of which is fixedly connected to the anti-rotation pressure plate, and the other end is fixedly connected to the first end of the guide sleeve. The adjusting bolt passes through the second end of the guide sleeve and enters the inner hole in a manner of contacting the anti-rotation pressure plate, and the compression amount of the compression spring is adjusted by adjusting the feeding depth of the adjusting bolt in the inner hole.
[0009] Optionally, the inner hole of the guide sleeve, the first pull rod, the second pull rod and the anti-rotation pressure plate are all coaxially arranged.
[0010] Optionally, a through hole is provided on the anti-rotation pressure plate, a second sliding bearing is fixed in the through hole, and the first pull rod is rotatably connected to the anti-rotation pressure plate via the second sliding bearing.
[0011] Optionally, a connecting key is provided on the side surface of the anti-rotation pressure plate, and a groove matching with the connecting key is provided on the side wall of the inner hole of the guide sleeve.
[0012] Optionally, a limit stopper is provided at one end of the first pull rod located in the guide sleeve, and a diameter of the limit stopper is greater than a diameter of the second sliding bearing.
[0013] Optionally, the first end of the guide sleeve is provided with a socket communicated with the inner hole, a first sliding bearing is fixed in the socket, and the first pull rod is rotatably inserted into the inner hole of the guide sleeve through the first sliding bearing.
[0014] Optionally, the inner hole diameter of the guide sleeve is larger than the diameter of the compression spring, the diameter of the compression spring is larger than the diameter of the socket, and the anti-rotation pressure plate and the guide sleeve are clearance-matched.
[0015] Optionally, the second pull rod is fixedly connected to the second end of the guide sleeve through a flange, a connecting column block is fixedly provided on the outer surface of the second end of the guide sleeve, and a connecting bolt passes through the connecting column block and the flange to connect the guide sleeve and the second pull rod.
[0016] Optionally, a plurality of adjustment through holes are provided on the flange, and the adjustment bolts pass through the adjustment through holes and enter into the inner hole of the guide sleeve.
[0017] Optionally, the distance from the adjusting bolt to the center of the second pull rod is smaller than the inner hole radius of the guide sleeve and larger than the through hole radius of the anti-rotation pressure plate, so that the end of the adjusting bolt can support the end face of the anti-rotation pressure plate, thereby pushing the anti-rotation pressure plate by changing the feed depth of the adjusting bolt in the inner hole of the guide sleeve, thereby changing the compression amount of the compression spring and providing a balancing pulling force for the two balanced components.
[0018] The beneficial effects of the utility model are:
[0019] The spring self-balancing device provided by the utility model has a split pull rod, a first pull rod and a second pull rod are respectively connected to two balanced components, and the elastic force generated when the compression spring is compressed is transmitted to the first pull rod and the second pull rod respectively, so that the first pull rod and the second pull rod always have a tendency to approach each other, and then the elastic force is converted into a pulling force on the two balanced components, thereby achieving the purpose of eliminating the mechanical connection gap between the two balanced components. The self-balancing device provided by the utility model can replace the balancing equipment of hydraulic cylinders or cylinders, reduce energy consumption in the operation of the equipment, avoid setting up complex energy supply pipelines, and save construction period and construction cost.
[0020] On this basis, the spring self-balancing device provided by the utility model can also be applied to two balanced components that rotate relative to each other. The first pull rod is partially inserted into the guide sleeve, and the guide sleeve is provided with an anti-rotation pressure plate that cannot rotate and can only move axially, and one end of the first pull rod located in the guide sleeve is connected to the anti-rotation pressure plate through a sliding bearing. It can be seen that the mechanical pair that constrains the first pull rod does not limit its rotational freedom, so that it can rotate relative to the first pull rod and other components of the self-balancing device.
[0021] Furthermore, the utility model pushes the anti-rotation pressure plate by adjusting the bolt, thereby causing the compression spring to deform. Changing the length of the adjusting bolt entering the inner hole of the guide sleeve can change the elastic force of the compression spring, thereby changing the balancing force provided by the device, making the balancing force adjustment of the device simpler and more accurate.
[0022] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be described in detail below in conjunction with the accompanying drawings, in which:
[0024] Figure 1A schematic diagram of the structure of the spring self-balancing device provided by the utility model;
[0025] Figure 2 This is an AA cross-sectional view of the spring self-balancing device provided by the utility model.
[0026] Figure markings: 100-first pull rod; 110-limit block; 200-second pull rod; 210-adjusting bolt; 300-guide sleeve; 310-inner hole; 320-socket; 330-compression spring; 340-anti-rotation pressure plate; 341-through hole; 342-connecting key; 350-first sliding bearing; 360-connecting column block; 370-second sliding bearing; 400-flange; 410-connecting bolt; 500-balanced component one; 600-balanced component two. DETAILED DESCRIPTION
[0027] The following describes the implementation of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. The following embodiments and the features in the embodiments can be combined with each other without conflict.
[0028] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present utility model. In order to better illustrate the embodiments of the present utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.
[0029] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back" and the like indicate directions or positional relationships, they are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.
[0030] According to an embodiment of the present invention, the spring self-balancing device provided by the present invention uses a split pull rod to connect the balanced component 1 500 and the balanced component 2 600, such as Figure 1 As shown, the first tie rod 100 and the second tie rod 200 are coaxially arranged. A guide sleeve 300 is arranged outside the first tie rod 100, and the guide sleeve 300 has an inner hole 310 arranged in the axial direction. The first tie rod 100 is partially inserted into the inner hole 310 of the guide sleeve 300 and remains in a rotatable state in the inner hole 310. For the convenience of description, the end of the guide sleeve 300 into which the first tie rod 100 is inserted is defined as the first end of the guide sleeve 300, and the end opposite to the first end of the guide sleeve 300 in the axial direction is defined as the second end.
[0031] The first end of the guide sleeve 300 is provided with a socket 320 connected to the inner hole 310, and the first pull rod 100 is partially inserted into the inner hole 310 of the guide sleeve 300 through the socket 320. In order to enable the first pull rod 100 to maintain a rotatable state, a first sliding bearing 350 is fixed on the socket 320, and the first pull rod 100 is rotatably inserted into the inner hole 310 of the guide sleeve 300 through the first sliding bearing 350 at the socket 320. The compression spring 330 is sleeved on the first pull rod 100. In order to prevent the compression spring 330 from twisting when rotating with the first pull rod 100, an anti-rotation pressure plate 340 is provided in the inner hole 310, as shown in FIG. Figure 2 As shown, a connection key 342 is provided on the outer surface of the anti-rotation pressure plate 340, which cooperates with the groove on the side wall of the inner hole 310, so that the anti-rotation pressure plate 340 is embedded in the inner hole 310, so that it can only move in the axial direction, but cannot rotate with the first pull rod 100. One end of the compression spring 330 is fixedly connected to the anti-rotation pressure plate 340, and the other end is fixedly connected to the first end of the guide sleeve 300.
[0032] Furthermore, a through hole 341 coaxial with the inner hole 310 is formed on the anti-rotation pressure plate 340, a second sliding bearing 370 is fixed in the through hole 341, and the first pull rod 100 passes through the through hole 341 on the anti-rotation pressure plate 340, and is rotatably connected to the anti-rotation pressure plate 340 through the second sliding bearing 370 at the through hole 341. A limit stopper 110 is provided on one end of the first pull rod 100 passing through the anti-rotation pressure plate 340, and the diameter of the limit stopper 110 is greater than the diameter of the sliding bearing 350, so as to limit the movement distance of the first pull rod 100 in the inner hole 310 of the guide sleeve 300.
[0033] Furthermore, the diameter of the inner hole 310 of the guide sleeve 300 is larger than the diameter of the compression spring 330, and the diameter of the compression spring 330 is larger than the diameter of the socket 320, so that the compression spring 330 can be fixedly connected to the first end of the guide sleeve 300. The outer diameter of the anti-rotation pressure plate 340 is clearance-matched with the diameter of the inner hole 310 of the guide sleeve 300, so that the anti-rotation pressure plate 340 can slide on the side wall of the inner hole 310.
[0034] The second tie rod 200 is fixedly connected to the second end of the guide sleeve 300, preferably fixedly connected to the second end of the guide sleeve 300 through a flange 400. A plurality of connecting column blocks 360 are fixedly arranged on the outer surface of the second end of the guide sleeve 300, preferably two connecting column blocks radially opposite to each other along the guide sleeve 300. The connecting bolt 410 passes through the connecting column block 360 and the flange 400 to connect the guide sleeve 300 and the second tie rod 200 to each other.
[0035] Furthermore, the flange 400 is provided with a plurality of adjustment through holes 341, which are distributed around the axial direction of the second pull rod 200. The adjustment bolt 210 passes through the adjustment through hole 341 and enters the inner hole 310 of the guide sleeve 300 to push the anti-rotation pressure plate 340 to compress the compression spring 330. The distance from the adjustment bolt 210 to the center of the second pull rod 200 is smaller than the radius of the inner hole 310 of the guide sleeve 300, and larger than the radius of the through hole 341 of the anti-rotation pressure plate 340, so that the end of the adjustment bolt 210 can support the end face of the anti-rotation pressure plate 340, thereby pushing the anti-rotation pressure plate 340 by changing the length of the adjustment bolt 210 in the inner hole 310 of the guide sleeve 300, thereby changing the compression amount of the compression spring 330, and providing different balancing forces for the two balanced components.
[0036] According to an embodiment of the present invention, when installing the spring self-balancing device provided by the present invention, the required balancing tension is first determined based on the connection conditions of the balanced component 1 500 and the balanced component 2 600, and then the preset balancing tension is converted into a preset spring compression amount, thereby determining the feeding depth of the adjusting bolt 210 in the inner hole 310. The adjusting bolt 210 enters the inner hole 310 according to the preset feeding depth, and pushes the anti-rotation pressure plate 340 to compress the compression spring 330. The preset compression amount of the compression spring 330 is maintained, the first pull rod 100 is connected to the balanced component 1 500, and the second pull rod 200 is connected to the balanced component 2 600. When the balanced component 1 500 and the balanced component 2 600 have a tendency to move relative to each other, the balanced component 1 500 and the balanced component 2 600 generate axial tension on the first pull rod 100 and the second pull rod 200. After the device is installed, the adjusting bolt 210 is withdrawn outwards by an appropriate distance. Since the connection positions of the first tie rod 100 and the second tie rod 200 and the balanced component 1 500 and the balanced component 2 600 are relatively fixed, when the balanced component 1 500 and the balanced component 2 600 have a tendency to move away from each other, the balanced component 1 500 provides an axial outward pulling force for the first tie rod 100, thereby keeping the compression spring 330 on the first tie rod 100 in a compressed state. The elastic force of the compression spring 300 makes the first tie rod 100 and the second tie rod 200 always have a tendency to move closer to each other, so that the balanced component 1 500 and the balanced component 2 600 always have a tendency to move closer to each other, thereby avoiding the generation of a mechanical gap between the balanced component 1 500 and the balanced component 2 600.
[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the utility model.
Claims
1. A spring self-balancing device, comprising a first pull rod (100) and a second pull rod (200) connecting a first balanced member (500) and a second balanced member (600), characterized in that: It also includes a guide sleeve (300), wherein the guide sleeve (300) is provided with an inner hole (310) arranged along its axial direction; The first pull rod (100) is rotatably inserted into the inner hole (310) from the first end of the guide sleeve (300), and the second pull rod (200) is fixedly connected to the second end of the guide sleeve (300) opposite to the first end, wherein: The guide sleeve (300) is provided with an anti-rotation pressure plate (340) that slides along the side wall of the inner hole (310), and one end of the first pull rod (100) located in the guide sleeve (300) is rotatably connected to the anti-rotation pressure plate (340); A compression spring (330) is sleeved on the first pull rod (100), one end of which is fixedly connected to the anti-rotation pressure plate (340), and the other end of which is fixedly connected to the first end of the guide sleeve (300); The adjusting bolt (210) passes through the second end of the guide sleeve (300) and enters the inner hole (310) in a manner of contacting the anti-rotation pressure plate (340), and the compression amount of the compression spring (330) is adjusted by the feeding depth of the adjusting bolt (210) in the inner hole (310).
2. The device according to claim 1, characterized in that: The inner hole (310) of the guide sleeve (300), the first pull rod (100), the second pull rod (200) and the anti-rotation pressure plate (340) are coaxially arranged.
3. The device according to claim 1, characterized in that: The anti-rotation pressure plate (340) is provided with a through hole (341), a second sliding bearing (370) is fixedly arranged in the through hole (341), and the first pull rod (100) is rotatably connected to the anti-rotation pressure plate (340) via the second sliding bearing (370).
4. The device according to claim 3, characterized in that: A connecting key (342) is arranged on the side of the anti-rotation pressure plate (340), and a groove matching with the connecting key (342) is arranged on the side wall of the inner hole (310) of the guide sleeve (300).
5. The device according to claim 3, characterized in that: A limit stopper (110) is provided at one end of the first pull rod (100) located inside the guide sleeve (300), and the diameter of the limit stopper (110) is greater than the diameter of the second sliding bearing (370).
6. The device according to claim 3, characterized in that: The first end of the guide sleeve (300) is provided with a socket (320) communicating with the inner hole (310), and a first sliding bearing (350) is fixedly provided in the socket (320). The first pull rod (100) is rotatably inserted into the inner hole (310) of the guide sleeve (300) through the first sliding bearing (350).
7. The device according to claim 6, characterized in that: The diameter of the inner hole (310) of the guide sleeve (300) is larger than the diameter of the compression spring (330), the diameter of the compression spring (330) is larger than the diameter of the socket (320), and the anti-rotation pressure plate (340) is clearance-matched with the guide sleeve (300).
8. The device according to claim 1, characterized in that: The second pull rod (200) is fixedly connected to the second end of the guide sleeve (300) via a flange (400), wherein a connecting column block (360) is fixedly provided on the outer surface of the second end of the guide sleeve (300), and a connecting bolt (410) passes through the connecting column block (360) and the flange (400) to connect the guide sleeve (300) and the second pull rod (200).
9. The device according to claim 8, characterized in that: The flange (400) is provided with a plurality of adjustment holes, and the adjustment bolts (210) pass through the adjustment holes and enter into the inner hole (310) of the guide sleeve (300), wherein the distance from the adjustment bolt (210) to the axis of the second pull rod (200) is smaller than the radius of the inner hole (310) of the guide sleeve (300) and larger than the radius of the through hole (341) of the anti-rotation pressure plate (340).