Lubricating structure of short-stroke lead screw elevator
By designing the lubricating structure of automatic oil injectors, oil conduits and oil conduit holes in a short-stroke screw lift, the problem that grease is difficult to reach the internal thread position of the worm gear is solved, and simultaneous lubrication is achieved in multiple places, reducing wear and extending service life.
Patent Information
- Application Number
- CN202421815894.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-07-30
AI Technical Summary
In traditional short-stroke screw lifts, it is difficult for grease to reach the internal thread position of the worm gear, resulting in wear of the screw nut pair and affecting service life.
A lubricating structure including a transmission assembly and a conveying structure is designed. Through an automatic oil injector, oil guide pipe and oil guide hole, the grease is directly transported to the moving contact points of the worm gear and the screw, achieving simultaneous lubrication at multiple places.
It effectively reduces the wear of the screw nut pair, extends the service life, and improves the lubrication effect of the short-stroke screw lift.
Smart Images
Figure CN222963306U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of screw jacks, in particular to a lubrication structure for a short-stroke screw jack. Background Art
[0002] In a traditional screw-driven elevator, a worm gear and worm pair drives a first screw nut pair. The drive source drives the worm to rotate, and after being decelerated by the worm gear and worm pair, the worm gear rotates. There is a trapezoidal thread on the inner ring of the worm gear. The trapezoidal thread on the inner ring of the worm gear cooperates with the trapezoidal screw. Without rotating with the worm gear, the screw moves up or down (reverse rotation) in a straight line, achieving the effect of converting rotational motion into linear motion. The traditional lubrication method for the screw nut pair is to apply grease on the screw. When the screw moves up and down, the grease is brought into the inner ring of the worm gear to lubricate the screw nut pair. However, since the exposed position of the screw is far from the position of the inner thread of the worm gear, only after the screw moves a certain distance can the grease reach the position of the inner thread of the worm gear. Especially in a short-stroke screw jack, the moving distance of the screw is relatively short, and the grease applied on the screw cannot reach the position of the inner thread of the worm gear, failing to play a lubricating role, resulting in the wear of the screw nut pair and seriously affecting the service life of the screw jack. Summary of the Utility Model
[0003] (1) Technical Problems to be Solved
[0004] In view of the deficiencies of the prior art, the utility model provides a lubrication structure for a short-stroke screw jack, which is suitable for lubricating short-stroke screw jacks, facilitates lubricating the screw nut pair, reduces the wear of the screw nut pair, and is beneficial to lubricating the transmission and rotating parts.
[0005] (2) Technical Solutions
[0006] To achieve the above object, the utility model provides the following technical solution: A lubrication structure for a short-stroke screw jack, comprising a transmission assembly and a conveying structure;
[0007] The transmission assembly includes a box body, a worm gear, a screw, and a worm. The worm gear and the worm are rotatably connected to the box body, the worm gear and the worm are meshed, the worm gear and the screw are in transmission connection, and the rotation of the worm gear can drive the screw to move;
[0008] The conveying structure includes an automatic oil injector, a three-way joint, an oil guide pipe, an oil port 1, an oil guide hole, and an oil port 2. There are several oil guide holes on the worm gear, and the oil guide holes communicate with the connection part of the screw. There are several oil port 1 and several oil port 2 on the box body. The oil port 1 is arranged opposite to the worm gear, and the oil port 2 is arranged opposite to the screw. The three-way joint is connected to the oil port 2 of the box body through the oil guide pipe, the three-way joint is connected to the oil port 1 of the box body, and the automatic oil injector is connected to the three-way joint.
[0009] Preferably, the worm gear includes an oil storage groove, and the oil storage groove is arranged inside the worm gear.
[0010] Preferably, the box body includes an end cover and a support box. There is a cavity inside the support box. The worm gear is located inside the support box. The support box is connected to the end cover. A limit hole corresponding to the lead screw is arranged on the end cover. The lead screw passes through the limit hole of the end cover. The second oil port is located on the end cover, and the first oil port is located on the support box. The second oil port communicates with the limit hole of the end cover, and the first oil port communicates with the internal cavity of the support box.
[0011] (III) Beneficial effects
[0012] Compared with the prior art, the present utility model provides a lubrication structure for a short-stroke lead screw lift, having the following beneficial effects:
[0013] In the lubrication structure of the short-stroke lead screw lift, the worm in the transmission component drives the worm gear to rotate. The worm gear cooperates with the lead screw, thereby effectively driving the lead screw to lift and adjust the lead screw to a suitable height position. By storing the lubricating grease for lubrication inside the automatic oiler, through the setting of the three-way joint, the lubricating grease is transmitted to the second oil port through the oil guide pipe, and then transmitted to the inside of the support box through the first oil port, so that the lubricating grease is distributed to the rotation part of the worm gear and the rotation part of the lead screw, achieving the effect of simultaneous lubrication in multiple places, and lubricating the two areas through the same lubricating oiler. The automatic oiler, three-way joint and oil guide pipe are added on the basis of the original lift, and the oil guide hole is added on the worm gear, improving the lubrication effect of the lead screw nut pair of the short-stroke lead screw lift. Description of the drawings
[0014] Figure 1 is a schematic structural diagram of the present utility model;
[0015] Figure 2 is a front view structural diagram of the present utility model;
[0016] Figure 3 is the present utility model Figure 2 The sectional structural diagram at A-A in;
[0017] Figure 4 is a right view structural diagram of the present utility model;
[0018] Figure 5 is the present utility model Figure 4 The sectional structural diagram at B-B in;
[0019] Figure 6 is a schematic structural diagram of the worm gear in the present utility model;
[0020] Figure 7 is a sectional structural diagram of the worm gear in the present utility model.
[0021] Labels in the attached drawings: 1, box body; 2, worm gear; 3, lead screw; 4, automatic oiler; 5, three-way joint; 6, oil guide pipe; 7, oil port 1; 8, oil guide hole; 9, worm; 10, end cover; 11, oil port 2; 12, oil storage tank; 13, support box. Detailed implementation mode
[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the attached drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.
[0023] Embodiment:
[0024] Please refer to Figures 1-7 , a lubrication structure for a short-stroke lead screw elevator, including a transmission assembly and a conveying structure.
[0025] The transmission assembly includes a box body 1, a worm gear 2, a lead screw 3 and a worm 9. The box body 1 is rotatably connected with a worm gear 2 and a worm 9. The worm gear 2 and the worm 9 are meshed, and the worm gear 2 and the lead screw 3 are in transmission connection. The rotation of the worm gear 2 can drive the lead screw 3 to move.
[0026] The conveying structure includes an automatic grease injector 4, a tee joint 5, an oil guiding pipe 6, an oil port 7, an oil guiding hole 8 and an oil port 11. A number of oil guiding holes 8 are provided on the worm gear 2. Preferably, the oil guiding holes 8 are arranged in different directions around the worm gear 2, i.e., front, rear, left and right. The connection between the oil guiding hole 8 and the lead screw 3 is communicated. A number of oil ports 7 and a number of oil ports 11 are provided on the box body 1. The oil port 7 is arranged opposite to the worm gear 2, and the oil port 11 is arranged opposite to the lead screw 3. The tee joint 5 is connected to the oil port 11 of the box body 1 through the oil guiding pipe 6, and the tee joint 5 is connected to the oil port 7 of the box body 1. The automatic grease injector 4 is connected to the tee joint 5. The tee joint 5, the box body 1 and the oil guiding pipe 6 are preferably connected through a pipe joint. The worm gear 2 and the lead screw 3 are preferably connected by a thread. The lead screw 3 is preferably a trapezoidal thread. The tee joint 5 is preferably an F-type tee grease joint. The automatic grease injector 4 is a common grease injection device with the function of transmitting grease. The worm 9 in the transmission assembly drives the worm gear 2 to rotate. The worm gear 2 and the lead screw 3 cooperate to effectively drive the lead screw 3 to lift and lower, and adjust the lead screw 3 to a suitable height position. By storing the lubricating grease in the automatic grease injector 4 and through the setting of the tee joint 5, the grease is transmitted to the oil port 11 through the oil guiding pipe 6 and then to the inside of the support box 13 through the oil port 7, so that the grease is distributed to the rotating parts of the worm gear 2 and the lead screw 3, achieving the effect of simultaneous lubrication in multiple places. And through the same automatic grease injector 4 for lubrication, two areas are lubricated. The automatic grease injector 4, the tee joint 5 and the oil guiding pipe 6 are added on the basis of the original elevator, and the oil guiding holes 8 are added on the worm gear 2, improving the lubrication effect of the screw-nut pair of the short-stroke screw elevator.
[0027] Refer to Figure 5 and 7 , the worm gear 2 includes an oil storage tank 12. The oil storage tank 12 is arranged inside the worm gear 2. Through the setting of the oil storage tank 12, the conveying effect of the lubricating fluid is improved, the storage amount of the lubricating fluid staying inside the worm gear 2 is increased, and it is more conducive to lubrication.
[0028] Refer to Figure 5 , the box body 1 includes an end cover 10 and a support box 13. A cavity is arranged inside the support box 13. The worm gear 2 is located inside the support box 13. The support box 13 is connected to the end cover 10. The end cover 10 is provided with a limiting hole corresponding to the lead screw 3. The lead screw 3 passes through the limiting hole of the end cover 10. The oil port 11 is located on the end cover 10, and the oil port 7 is located on the support box 13. The oil port 11 is communicated with the limiting hole of the end cover 10, and the oil port 7 is communicated with the internal cavity of the support box 13. The worm gear 2 and the inside of the support box 13 are preferably rotatably connected through a bearing. The end cover 10 and the support box 13 are preferably connected by screws. Through the connection between the end cover 10 and the support box 13 in the box body 1, it is convenient to install the worm gear 2 and the worm 9. And since the oil port 11 is located on the end cover 10, the transmitted lubricating fluid can be transmitted to the lead screw 3 through the oil port 11. The end cover 10 is lighter in weight, which is convenient for machining the oil port 11.
[0029] In use, the automatic lubricator 4 sets the lubrication time according to the working time of the equipment. The automatic lubricator 4 supplies grease to the lead screw 3 and the inside of the box body 1 respectively through the tee joint 5 and the oil guide pipe 6. The grease flowing into the surrounding part of the lead screw 3 lubricates the contact surface between the lead screw 3 and the support box 13. The grease flowing into the support box 13 lubricates the worm gear pair composed of the worm gear 2 and the worm 9 and the lead screw nut pair composed of the worm gear 2 and the lead screw 3. An oil guide hole 8 is drilled inward at the root of the tooth of the worm gear 2. During the rotation of the worm 9, the grease adhering to the top of the tooth of the worm 9 will be squeezed into the internal oil storage groove 12 of the worm gear 2 through the oil guide hole 8. The grease in the oil storage groove 12 will be brought into the contact surface of the lead screw nut pair along with the axial movement of the trapezoidal lead screw 3 to lubricate the lead screw nut pair and reduce the wear of the lead screw nut pair.
[0030] It should be noted that phrases such as "one embodiment", "embodiment", "exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include specific features, structures or characteristics, but not necessarily every embodiment includes such specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. Moreover, when combining specific features, structures or characteristics with an embodiment, implementing such features, structures or characteristics in other embodiments, whether explicitly or implicitly described, is within the knowledge scope of those skilled in the art.
[0031] It should be easily understood that the terms "on", "above", and "over" in the present disclosure should be interpreted in the broadest manner, so that "on" not only means "directly on something", but also includes the meaning of "on something" with intermediate features or layers therebetween, and "above" or "over" not only includes the meaning of "above" or "over something", but also can include the meaning of "above" or "over something" without intermediate features or layers therebetween (i.e., directly on something).
[0032] In addition, for the convenience of description, spatial relative terms can be used in the text, such as "below", "beneath", "under", "above", "over", etc., to describe the relationship of one element or feature relative to other elements or features as shown in the figure. Spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation shown in the drawings. The device can have other orientations (rotated 90 degrees or in other orientations), and the spatial relative descriptive words used in the text can be interpreted accordingly.
[0033] It should be noted that in this document, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.
[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A lubrication structure for a short-stroke screw lift, characterized in that: It includes a transmission assembly and a conveying structure; The transmission assembly comprises a housing (1), a worm wheel (2), a screw (3) and a worm (9); the housing (1) is rotatably connected with the worm wheel (2) and the worm (9); the worm wheel (2) and the worm (9) are meshed; the worm wheel (2) and the screw (3) are transmission-connected; the rotation of the worm wheel (2) can drive the screw (3) to move; The conveying structure comprises an automatic oil injector (4), a three-way joint (5), an oil guide pipe (6), an oil port 1 (7), an oil guide hole (8) and an oil port 2 (11); a plurality of oil guide holes (8) are provided on the worm gear (2); the oil guide holes (8) and the connecting part of the screw rod (3) are in communication; a plurality of oil ports 1 (7) and a plurality of oil ports 2 (11) are provided on the casing (1); the oil port 1 (7) and the worm gear (2) are arranged opposite to each other; the oil port 2 (11) and the screw rod (3) are arranged opposite to each other; the three-way joint (5) and the oil port 2 (11) of the casing (1) are in communication through the oil guide pipe (6); the three-way joint (5) and the oil port 1 (7) of the casing (1) are in communication; and the automatic oil injector (4) and the three-way joint (5) are in communication.
2. The lubrication structure of a short-stroke screw lifter according to claim 1, characterized in that: The worm wheel (2) comprises an oil storage tank (12), and the oil storage tank (12) is arranged inside the worm wheel (2).
3. The lubrication structure of a short-stroke screw lifter according to claim 1, characterized in that: The box body (1) comprises an end cover (10) and a support box (13); a cavity is arranged inside the support box (13); the worm wheel (2) is located inside the support box (13); the support box (13) and the end cover (10) are connected; a limiting hole corresponding to the screw rod (3) is arranged on the end cover (10); the screw rod (3) passes through the limiting hole of the end cover (10); the second oil port (11) is located on the end cover (10); the first oil port (7) is located on the support box (13); the second oil port (11) and the limiting hole of the end cover (10) are in communication; the first oil port (7) and the cavity inside the support box (13) are in communication.