CN114623218A - Ball screw pair with hole-opening circulator, brake and new energy automobile - Google Patents
Ball screw pair with hole-opening circulator, brake and new energy automobile Download PDFInfo
- Publication number
- CN114623218A CN114623218A CN202210346315.6A CN202210346315A CN114623218A CN 114623218 A CN114623218 A CN 114623218A CN 202210346315 A CN202210346315 A CN 202210346315A CN 114623218 A CN114623218 A CN 114623218A
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- Prior art keywords
- circulator
- ball
- hole
- ball screw
- nut
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
- F16H25/2204—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
- F16H25/2214—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls with elements for guiding the circulating balls
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/18—Mechanical mechanisms
- F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
- F16D2125/34—Mechanical mechanisms converting rotation to linear movement or vice versa acting in the direction of the axis of rotation
- F16D2125/40—Screw-and-nut
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a ball screw pair with a hole-opening circulator, a brake and a new energy automobile, wherein the ball screw pair comprises a screw, a nut, balls and a circulator, an inner spiral raceway is arranged on the nut, an outer spiral raceway is arranged on the outer wall surface of the screw, the inner spiral raceway and the outer spiral raceway are matched to form a ball channel for containing the balls, two circulators communicated with the ball channel are arranged on the ball channel, a round hole is arranged on the side wall of the circulator, a bent runner is arranged in the circulator, one end surface of the circulator is provided with a hole, and the runner is communicated with the round hole; the screw rod is internally provided with a vertically arranged circulation channel, and the round holes of the two circulators are respectively communicated with the circulation channel. The ball screw pair with the hole-breaking circulators can enable the nut with one multi-ball channel to be only provided with two circulators to form a multi-turn circulating chain, and compared with a small-lead multi-turn internal circulation ball screw pair, the ball screw pair has the advantages that the number of the used circulators is less, and the rigidity of the ball screw pair is better.
Description
Technical Field
The invention relates to the field of ball screw pairs, in particular to a ball screw pair with a hole-opening circulator, a brake and a new energy automobile.
Background
The ball screw assembly is a screw transmission element using a steel ball as a rolling element between a screw and a nut, and is a transmission device which is high in precision and most commonly used in transmission machinery. Mainly comprises a screw rod, a nut, a ball, a circulator and the like. The balls are arranged in the nut along the raceway in sequence to form a ball circulation chain. The ball chain forms a closed circulating chain between the screw rod and the nut through a circulator arranged on the nut so as to realize continuous movement. The nut sets up the ball to return to the circulation channel through the circulator, so that the ball realizes the reciprocating motion. This is a necessary measure for the ball chain to form a closed circuit.
With the technological progress, the application range of the ball screw pair is wider and wider, and the requirements on the functionality of the ball screw pair are gradually improved. Particularly, after the oil pressure of a new energy automobile brake (brake system) is changed into electricity, most electric control brake devices adopt a ball screw pair as an execution functional component. Due to the application environment of the electric control brake, safety and other aspects. New special requirements are put forward on the structure of the ball screw pair so as to meet the requirements of functions. If key grooves, bosses, flat squares, lugs, threads and the like are designed on the excircle of the ball nut, the design is greatly different from the structure of a ball screw pair nut for a numerical control machine tool. If the arrangement of the circulator on the nut adopts a conventional design scheme, the arrangement of the circulator on the nut can interfere with the arrangement of the nut with a cylindrical convex key, an oblate insert and the like. When the mounting holes of the circulator are arranged, the mounting holes can be overlapped with the key slots, the bosses and the like, so that the circulator cannot be mounted or the functions and the functions of the key slots, the bosses and the like are influenced. The existing ball screw pair has a large number of circulators, so that the ball screw pair has low rigidity and long processing time.
Disclosure of Invention
The invention mainly aims to provide a ball screw pair with a hole-opening circulator, a brake and a new energy automobile, and aims to solve the technical problems.
In order to achieve the purpose, the ball screw pair with the hole-opening circulator comprises a screw, a nut, a ball and the circulator, wherein an inner spiral raceway is arranged on the nut, an outer spiral raceway is arranged on the outer wall surface of the screw, the inner spiral raceway and the outer spiral raceway are matched to form a ball channel for containing the ball, two circulators communicated with the ball channel are arranged on the ball channel, a circular hole is arranged on the side wall of the circulator, a bent flow channel is arranged in the circulator, a hole is arranged on one end surface of the circulator, and the flow channel is communicated with the circular hole and the hole; the screw rod is internally provided with a vertically arranged circulation channel, and the circular holes of the two circulators are respectively communicated with the circulation channel.
In one embodiment, the end of the circulator provided with the opening is provided with a concave front surface which is concave towards the inner side.
In one embodiment, the front concave surface is a circular arc surface and is matched with the shape of the lead screw.
In one embodiment, the circulator is provided with a positioning flange, and the positioning flange is arranged above the notch hole.
In one embodiment, the nut is provided with a slot, and the circulator has an outer dimension matched with the slot to limit the circulator circumferentially through an inner wall of the slot.
In one embodiment, the outer wall surface of the circulator is provided with a positioning flange, and the positioning flange is attached to two sides of the ball passage.
In addition, the invention also provides a brake, which comprises at least one ball screw pair with the hole circulator.
In addition, the invention also provides a new energy automobile which comprises the brake.
In the technical scheme of the invention, the ball screw pair with the hole-opening circulator comprises a screw, balls and a nut, wherein an inner spiral raceway is arranged on the nut, an outer spiral raceway is arranged on the outer wall surface of the screw, the inner spiral raceway and the outer spiral raceway are matched to form a ball passage for containing the balls, two circulators communicated with the ball passage are arranged on the ball passage, a circular hole is arranged on the side wall of the circulator, a bent flow passage is arranged in the circulator, a hole is arranged on one end surface of the circulator, and the flow passage is communicated with the circular hole and the hole; the screw rod is internally provided with a vertically arranged circulation channel, and the circular holes of the two circulators are respectively communicated with the circulation channel. Therefore, only two circulators are arranged in the nut with one multi-ball channel to form a multi-turn circulating chain, and compared with a small-lead multi-turn internal circulating ball screw pair, the number of the circulators used is less, and the rigidity of the screw nut pair is enhanced. Can reduce the processing amount, save the working time, reduce the cost and facilitate the assembly.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural view of a ball screw assembly having a slotted circulator in accordance with an embodiment of the present invention;
FIG. 2 is a schematic diagram of a partial structure of a ball screw assembly having a slotted circulator according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of the ball screw assembly with a hole-opening circulator according to the embodiment of the present invention with a nut removed;
FIG. 4 is a schematic structural diagram of a circulator according to an embodiment of the invention;
fig. 5 is a schematic cross-sectional view of a circulator according to an embodiment of the invention.
The reference numbers illustrate: 10. a screw rod, 20 and a nut; 30. a ball bearing; 40. a circulator; 41. a circular hole; 42. opening holes; 43. a flow channel; 44. a front concave surface; 45. a positioning flange; 46. and (5) positioning the flange.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.
Moreover, the technical solutions in the embodiments of the present invention may be combined with each other, but it is necessary to be able to be realized by a person skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the scope of protection claimed by the present invention.
The invention provides a ball screw pair with a hole-opening circulator.
As shown in fig. 1 to 5, a ball screw pair with a hole-opening circulator provided in an embodiment of the present invention includes a screw, balls, and a nut, where an inner spiral raceway is disposed on the nut, an outer spiral raceway is disposed on an outer wall surface of the screw, the inner spiral raceway and the outer spiral raceway cooperate to form a ball passage for accommodating the balls, two circulators communicated with the ball passage are disposed on the ball passage, a circular hole is disposed on a side wall of the circulator, a bent flow passage is disposed in the circulator, a hole is disposed on an end surface of the circulator, and the flow passage is communicated with the circular hole and the hole; the screw rod is internally provided with a vertically arranged circulation channel, and the circular holes of the two circulators are respectively communicated with the circulation channel.
In this embodiment, the ball screw assembly includes a screw, balls, and a nut, where the nut is provided with an internal spiral raceway, the outer wall surface of the screw is provided with an external spiral raceway, the internal spiral raceway and the external spiral raceway cooperate to form a ball passage for accommodating the balls, the ball passage is provided with two circulators communicated with the ball passage, the side wall of each circulator is provided with a circular hole, a bent flow passage is provided in each circulator, one end surface of each circulator is provided with a notch, and the flow passage is communicated with the circular hole and the notch; the screw rod is internally provided with a vertically arranged circulation channel, and the circular holes of the two circulators are respectively communicated with the circulation channel. Therefore, the multi-circle circulating chain can be formed by only arranging two circulators on the nut with the multiple ball channels, and the circulator has wide applicability and can cover ball screw nuts with various specifications, different pitch diameters and leads. Compared with a small-lead multi-turn internal circulation ball screw pair, the number of used circulators is small, and the rigidity of the screw nut pair is enhanced. Can reduce the processing amount, save the working time, reduce the cost and facilitate the assembly.
The brake is particularly suitable for an electric pedal brake system (foot brake) of a new energy automobile. The micro ball screw assembly can also be applied to the micro ball screw assembly with narrow installation position and large torque.
Further, the end part of the circulator provided with the opening is a concave front surface which is concave towards the inner side. The front concave surface is a circular arc surface and is matched with the appearance of the lead screw. Interference in assembly can be prevented. This application has compatible ball nut inner loop ware and outer circulator design mechanism, and the ball circulator installation back does not surpass the nut excircle, and two circulators are arranged respectively in the nut both sides, play one-way ball effect that returns. The design greatly reduces the turning radius of the ball and the climbing angle of the ball.
Meanwhile, a positioning flange is arranged on the circulator and is arranged above the opening. The nut is provided with a slotted hole, and the outer size of the circulator is matched with the slotted hole so as to limit the circumferential direction of the circulator through the inner wall surface of the slotted hole.
The outer wall surface of the circulator is provided with a positioning flange, and the positioning flange is attached to two sides of the ball passage. In the embodiment, the positioning flange is attached to two sides of the nut raceway to prevent outward movement; the positioning flange is matched with the screw rod roller path to prevent the inward movement.
This application compares with current inner loop ware, and same specification nut circulator quantity reduces. For example, a ball nut with an internal circulation structure with 4 raceways needs to be provided with 4 circulators, while the invention only needs 2 circulators, which is reduced by half.
This application ball atress is even. Because all the balls in the nut cavity move sequentially along the nut raceway, that is, all the balls contact all the raceways of the nut. And with the nut of the internal circulator, only one circle of balls is managed by one circulator, and 4 circulators are needed to be arranged in 4 circles of nuts. Because the ball nut only adopts 2 valve type ball circulators, the design of more circles of ball circulation reduces at least more than 2 circulators. The full-circulation mode that each steel ball has multiple circles is beneficial to reducing the load change of the steel balls, improving the operation quality and prolonging the service life of the system.
The circulator is manufactured by powder metallurgy, and has the advantages of high precision, high efficiency, good consistency and low cost. Can meet the requirement of large batch. Meanwhile, the processing quantity of the ball nut circulator holes is reduced, the working hours are reduced, the single machine productivity is improved, and the production cost is reduced. Reduces material consumption, reduces waste discharge and is beneficial to environmental protection.
Because the ball flowing port of the circulator is connected with the radian of the roller path in a round way, the circulator is positioned accurately, the ball flowing port is not required to be polished and repaired manually, the assembly work is greatly facilitated, and the assembly efficiency is improved by more than 3 times. And the noise is lower than that of the similar internal circulation multi-turn nut.
Further, the invention also relates to a brake, which comprises at least one ball screw pair with a hole circulator.
In addition, the invention also relates to a new energy automobile which comprises an automobile body and a brake arranged on the automobile body. Since the brake and the new energy automobile adopt all the technical schemes of all the embodiments, at least all the beneficial effects brought by the technical schemes of the embodiments are achieved, and detailed description is omitted.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. The ball screw pair with the hole-opening circulator is characterized by comprising a screw, a nut, balls and a circulator, wherein an inner spiral raceway is arranged on the nut, an outer spiral raceway is arranged on the outer wall surface of the screw, the inner spiral raceway and the outer spiral raceway are matched to form a ball channel for containing the balls, two circulators communicated with the ball channel are arranged on the ball channel, a circular hole is formed in the side wall of each circulator, a bent flow channel is arranged in each circulator, one end surface of each circulator is provided with a hole, and the flow channel is communicated with the circular hole and the hole; the screw rod is internally provided with a vertically arranged circulation channel, and the circular holes of the two circulators are respectively communicated with the circulation channel.
2. The ball screw pair having a hole-opening circulator of claim 1 wherein the end of the circulator having the hole-opening is configured to be concave front surface depressed inward.
3. The ball screw pair with the hole-opening circulator of claim 2, wherein the concave front surface is a circular arc and is adapted to the shape of the screw.
4. The ball screw assembly of claim 1, wherein the circulator has a locating flange disposed above the opening.
5. A ballscrew assembly having a hole-opening circulator as claimed in claim 1, wherein the nut has a slot therein, the circulator having an outer dimension which cooperates with the slot to circumferentially limit the circulator by an inner wall of the slot.
6. The ball screw pair with the hole-opening circulator of claim 1, wherein a positioning flange is arranged on the outer wall surface of the circulator, and the positioning flange is attached to two sides of the ball channel.
7. A brake comprising at least one ball screw assembly having a holed circulator as claimed in any one of claims 1 to 6.
8. A new energy automobile, characterized in that the new energy automobile includes the brake of claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210346315.6A CN114623218A (en) | 2022-04-02 | 2022-04-02 | Ball screw pair with hole-opening circulator, brake and new energy automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210346315.6A CN114623218A (en) | 2022-04-02 | 2022-04-02 | Ball screw pair with hole-opening circulator, brake and new energy automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114623218A true CN114623218A (en) | 2022-06-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210346315.6A Pending CN114623218A (en) | 2022-04-02 | 2022-04-02 | Ball screw pair with hole-opening circulator, brake and new energy automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114623218A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117803692A (en) * | 2024-02-29 | 2024-04-02 | 恒科鑫(深圳)智能科技有限公司 | Internal circulation screw-nut assembly and transmission system |
-
2022
- 2022-04-02 CN CN202210346315.6A patent/CN114623218A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117803692A (en) * | 2024-02-29 | 2024-04-02 | 恒科鑫(深圳)智能科技有限公司 | Internal circulation screw-nut assembly and transmission system |
| CN117803692B (en) * | 2024-02-29 | 2024-05-03 | 恒科鑫(深圳)智能科技有限公司 | Internal circulation screw-nut assembly and transmission system |
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