Positioning piece for lead screw
By designing the mating structure of the guide groove, positioning block and spring in the screw positioner, and injecting lubricating oil with the oil storage chamber and oil conducting hole, the gap increase problem caused by friction and wear of the conventional screw positioner is solved, and the accuracy and stability of the screw motion are improved.
Patent Information
- Application Number
- CN202420446282.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-07
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-03-07
AI Technical Summary
During the use of traditional screw positioning members, friction and wear between the screw rod and the screw hole on the positioning member leads to an increase in the gap, resulting in a reduction in transmission accuracy, shaking or unstable during the screw movement, affecting the performance and stability of the mechanical system.
A screw positioner including a base, an upper positioning plate and a lower positioning plate is designed to maintain the stability of the rotating passage through the coordination of the guide groove, a positioning block and a spring, and to inject lubricating oil through the arrangement of the oil storage chamber and the oil conducting hole to reduce friction.
It effectively avoids the increase in the gap between the screw and the positioning member, improves the transmission accuracy and stability of the screw movement, and enhances the performance and practicality of the entire mechanical system.
Smart Images
Figure CN222596675U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of screw rod positioning pieces, and more specifically, to a positioning piece used for a screw rod. Background Art
[0002] The lead screw, also known as a trapezoidal lead screw or an adjustable lead screw, is mainly used to convert rotational motion into linear motion. The positioning piece for the lead screw is a mechanical component, usually used to fix and position the lead screw to ensure that it maintains a stable and accurate position during operation. When traditional positioning pieces for lead screws are used in mechanical systems, the friction and wear between the lead screw and the lead screw hole on the positioning piece during movement will cause the gap between the lead screw and the lead screw hole on the positioning piece to increase, resulting in reduced transmission accuracy, shaking or instability during the movement of the lead screw, affecting the performance and stability of the entire mechanical system and reducing practicality. Utility Model Content
[0003] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a positioning part for the screw rod that can avoid the increase of the gap between the screw rod and the rotating channel on the positioning part during the movement, which may cause the screw rod to have reduced transmission accuracy, shaking or instability during the movement, affecting the performance and stability of the entire mechanical system and reducing practicality.
[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0005] A positioning member for a screw rod comprises a base, an upper positioning plate and a lower positioning plate, wherein the lower positioning plate is fixed on the base, the upper positioning plate is placed above the lower positioning plate and cooperates with the lower positioning plate, the upper positioning plate is provided with a first rotating groove which cooperates with the screw rod, the lower positioning plate is provided with a second rotating groove which cooperates with the screw rod, the first rotating groove and the second rotating groove cooperate to form a rotating channel, and the screw rod rotates in the rotating channel.
[0006] The lower positioning plate is provided with two guide grooves respectively placed on both sides of the second rotating groove, and the upper positioning plate is fixed with two positioning blocks respectively plugged into the two guide grooves. The positioning blocks move in the guide grooves, and a spring in a stretched state is fixed in each of the two guide grooves, and the two springs are respectively fixedly connected to the two positioning blocks.
[0007] It is further configured that the upper positioning plate is provided with an oil filling hole and an oil guide hole connected to the oil storage chamber and the oil storage chamber, the oil guide hole is connected to the first rotating groove, and a sealing plug is inserted into the oil filling hole.
[0008] It is further configured that an oil-conducting cotton strip extending out of the oil-conducting hole is installed in the oil-conducting hole.
[0009] It is further configured that the oil guide hole is in a truncated cone shape, and the end of the oil guide hole with a smaller bottom area is connected to the first rotating groove.
[0010] By adopting the above technical scheme, the beneficial effect of the utility model is that it can avoid the increase of the gap between the screw rod and the rotating channel on the positioning part during the movement, which may cause the screw rod to have reduced transmission accuracy, shaking or instability during the movement, affecting the performance and stability of the entire mechanical system and reducing practicality. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a schematic structural diagram of an embodiment of the utility model.
[0012] Figure 2 It is a structural schematic diagram of the cooperation between the upper positioning plate and the lower positioning plate.
[0013] In the figure: screw rod 011, base 1, upper positioning plate 2, lower positioning plate 3, first rotating groove 4, second rotating groove 5, rotating channel 6, guide groove 7, positioning block 8, spring 9, oil storage chamber 10, oil filling hole 11, oil guide hole 12, sealing plug 13, oil guide cotton strip 14. DETAILED DESCRIPTION
[0014] Reference Figure 1 to Figure 2 The embodiments of the utility model are further described.
[0015] A positioning member for a screw rod comprises a base 1, an upper positioning plate 2 and a lower positioning plate 3, wherein the lower positioning plate 3 is fixed on the base 1, the upper positioning plate 2 is placed above the lower positioning plate 3 and cooperates with the lower positioning plate 3, the upper positioning plate 2 is provided with a first rotation groove 4 which cooperates with the screw rod 011, the lower positioning plate 3 is provided with a second rotation groove which cooperates with the screw rod 011, the first rotation groove 4 and the second rotation groove 5 are both arc-shaped, the first rotation groove 4 and the second rotation groove 5 cooperate to form a rotation channel 6, the screw rod 011 rotates in the rotation channel 6,
[0016] The lower positioning plate 3 is provided with two guide grooves 7 respectively placed on both sides of the second rotating groove 5. The upper positioning plate 2 is fixed with two positioning blocks 8 respectively plugged into the two guide grooves 7. The positioning blocks 8 move in the guide grooves 7. A spring 9 in a stretched state is fixed in each of the two guide grooves 7. The two springs 9 are fixedly connected to the two positioning blocks 8 respectively.
[0017] Working principle: When the screw rod 011 rotates in the rotating channel 6, the screw rod 011 contacts the inner wall of the first rotating groove 4 of the upper positioning plate 2 and the inner wall of the second rotating groove 5 of the lower positioning plate 3 to cause wear, thereby increasing the gap between the rotating channel 6 and the screw rod 011. At this time, the tension generated by the spring 9 in the stretched state fixed in the guide groove 7 on the lower positioning plate 3 causes the upper positioning plate 2 to move closer to the lower positioning plate 3 through the positioning block 8, thereby reducing the size of the rotating channel 6 to avoid the gap between the screw rod 011 and the rotating channel 6 becoming larger and larger, thereby preventing the screw rod 011 from During the movement, the gap between the screw 011 and the rotating channel 6 on the positioning member increases, resulting in reduced transmission accuracy, shaking or instability of the screw rod 011 during the movement, affecting the performance and stability of the entire mechanical system and reducing practicality. The positioning block 8 is plugged into the guide groove 7 and can move in the guide groove 7, so that the spring 9 can pull the upper positioning plate 2 close to the lower positioning plate 3 through the positioning block 8, and the first rotating groove 4 and the second rotating groove 5 are misaligned, resulting in the movement of the screw rod 011 in the rotating channel 6 being blocked, affecting the movement of the screw rod 011 and further improving practicality.
[0018] The upper positioning plate 2 is provided with an oil filling hole 11 and an oil guide hole 12 connected to the oil storage chamber 10, the oil guide hole 12 is connected to the first rotating groove 4, a sealing plug 13 is inserted into the oil filling hole 11, and an oil guide cotton strip 14 extending out of the oil guide hole 12 is installed in the oil guide hole 12. After the sealing plug 13 is opened to add the lubricating oil into the oil storage chamber 10 through the oil filling hole 11, the oil filling hole 11 is sealed with the sealing plug 13 to prevent the lubricating oil from spilling. When the screw 011 moves in the rotating channel 6, the lubricating oil in the oil storage chamber 10 flows into the rotating channel 6 through the oil guide hole 12 to lubricate the screw 011, thereby reducing the friction and wear of the screw 011 in the rotating channel 6, thereby preventing the screw 011 from moving. The clearance between the screw 011 and the rotating channel 6 on the positioning member increases during the movement, further preventing the screw 011 from experiencing reduced transmission accuracy, shaking or instability during the movement, thereby improving the performance and stability of the entire mechanical system. At the same time, the oil-guiding cotton strip 14 guides the lubricating oil in the oil storage chamber 10 into the rotating channel 6 to lubricate the screw 011, thereby preventing the lubricating oil from entering the rotating channel 6 through the oil guide hole 12 too much and causing waste and excessive lubrication, thereby further improving practicality. The oil guide hole 12 is truncated cone-shaped, and the end with a small bottom area of the oil guide hole 12 is connected to the first rotating groove 4, thereby better preventing the lubricating oil in the oil storage chamber 10 from entering the rotating channel 6 too much and causing waste and excessive lubrication affecting the movement of the screw 011.
[0019] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any common changes and substitutions made by those skilled in the art within the technical solution of the present invention should be included in the protection scope of the present invention.
Claims
1. A positioning member for a screw rod, characterized in that: The invention comprises a base (1), an upper positioning plate (2) and a lower positioning plate (3), wherein the lower positioning plate (3) is fixed on the base (1), the upper positioning plate (2) is placed above the lower positioning plate (3) and cooperates with the lower positioning plate (3), the upper positioning plate (2) is provided with a first rotation groove (4) which cooperates with the screw rod (011), the lower positioning plate (3) is provided with a second rotation groove which cooperates with the screw rod (011), the first rotation groove (4) and the second rotation groove (5) cooperate to form a rotation channel (6), and the screw rod (011) rotates in the rotation channel (6). The lower positioning plate (3) is provided with two guide grooves (7) respectively disposed on both sides of the second rotating groove (5); the upper positioning plate (2) is provided with two positioning blocks (8) respectively plugged into the two guide grooves (7); the positioning blocks (8) move in the guide grooves (7); a spring (9) in a stretched state is fixed in each of the two guide grooves (7); the two springs (9) are respectively fixedly connected to the two positioning blocks (8).
2. A positioning member for a screw rod according to claim 1, characterized in that: The upper positioning plate (2) is provided with an oil filling hole (11) and an oil guide hole (12) connected to the oil storage chamber (10); the oil guide hole (12) is connected to the first rotating groove (4); and a sealing plug (13) is inserted into the oil filling hole (11).
3. A positioning member for a screw rod according to claim 2, characterized in that: An oil-conducting cotton strip (14) extending out of the oil-conducting hole (12) is installed in the oil-conducting hole (12).
4. A positioning member for a screw rod according to claim 3, characterized in that: The oil guide hole (12) is in the shape of a truncated cone, and the end of the oil guide hole (12) with a smaller bottom area is connected to the first rotating groove (4).