CN215214613U - Mutually-nested ball screw pair combination - Google Patents
Mutually-nested ball screw pair combination Download PDFInfo
- Publication number
- CN215214613U CN215214613U CN202120010714.6U CN202120010714U CN215214613U CN 215214613 U CN215214613 U CN 215214613U CN 202120010714 U CN202120010714 U CN 202120010714U CN 215214613 U CN215214613 U CN 215214613U
- Authority
- CN
- China
- Prior art keywords
- nut
- screw
- ball screw
- lead ball
- lead
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Transmission Devices (AREA)
Abstract
The utility model discloses a mutually nested ball screw pair combination, which is characterized in that the inner diameter of a nut screw is a small lead ball screw pair formed by matching a ball nut and a small lead ball screw; the outer diameter of the nut screw is made into a large-lead ball screw, and a large-lead ball screw pair is formed by matching multi-head threads with a large-lead ball nut; end face ball returning devices are arranged on two end faces of the nut screw; the nut screw is guided by a guide shaft, and two ends of the guide shaft are fixed on the bearing block and the end cover; the large-lead ball nut is connected with the rotating arm; due to the limitation of the guide shaft, the nut screw can only move back and forth to drive the large-lead ball nut to rotate so as to drive the rotating arm to rotate. The utility model discloses with the ball screw of a little helical pitch vice and the vice mutual nestification of a big helical pitch ball together, realized turning into big output torque function with little input torque.
Description
Technical Field
The utility model relates to a ball is vice.
Background
At present, in the fields such as electric cylinder, in order to improve transmission efficiency, the ball screw pair with high transmission efficiency is often selected for use by its transmission part, and the ball screw pair is a transmission mechanism converting rotary motion into linear motion. Some mechanisms needing to be opened, closed or folded are limited by space and energy sources carried by the mechanisms, and the rotating parts can only be driven in a pneumatic or hydraulic mode to obtain large rotating torque, so that the control precision is difficult to improve.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a ball screw pair combination of nesting each other, the ball screw pair with a little helical pitch is in the same place with the vice nestification of a big helical pitch ball, has realized turning into big output torque function with little input torque.
The technical scheme of the utility model is that a mutually nested ball screw pair combination comprises a motor, a speed reducer, a nut screw, an outer sleeve, a bearing seat and an end cover, and is characterized in that the inner diameter of the nut screw is formed into a small lead ball screw pair by matching a ball nut and the small lead ball screw; the outer diameter of the nut screw is made into a large-lead ball screw, and a multi-head thread is adopted to be matched with the large-lead ball nut to form a large-lead ball screw pair; end face ball returning devices are arranged on two end faces of the nut screw; the nut screw is guided by a guide shaft, and two ends of the guide shaft are fixed on the bearing block and the end cover; the large-lead ball nut is connected with the rotating arm; due to the limitation of the guide shaft, the nut screw can only move back and forth, when the nut screw moves back and forth, the large-lead ball nut is driven to rotate, and the large-lead ball nut drives the rotating arm to rotate.
Further, the motor is coupled to the speed reducer, the speed reducer is coupled to the small lead ball screw, and the small lead ball screw is coupled to the bearing housing through a first support shaft.
Further, a second support shaft is provided between the large-lead ball nut and the outer sleeve.
The utility model discloses compact structure, installation space is little, and the reliability is high, and output drive moment increases effectually, can increase more than 50 times, receives space restriction at some, will make rotary part obtain the application place of very big drive moment, has fine application.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
The reference numbers illustrate: 1, a motor; 2, a speed reducer; 3-small lead ball screw; 4-a first support shaft; 5, a nut screw; 6-strip-shaped bead returning device; 7-a rotating arm; 8, steel ball I; 9-end face ball returning device; 10-large lead ball nut; 11-outer sleeve; 12 — a second support shaft; 13-a fastening screw; 14-steel ball two; 15-a guide shaft; 16-end cap; 17-a fixed pin; and 18, bearing seats.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the scope protected by the present invention.
As shown in fig. 1, the utility model relates to a ball screw pair combination nested each other, mechanical structure is as follows: the motor 1 is connected with the speed reducer 2, the speed reducer 2 is connected with the small-lead ball screw 3, the small-lead ball screw 3 is connected with the bearing seat 18 through the first support shaft 4, the nut screw 5 and the small-lead ball screw 3 form a small-lead ball screw pair, and the steel ball 14 passes through the strip-shaped ball returning device 6 for reverse circulation; the nut screw 5 is guided by a guide shaft 15, and two ends of the guide shaft 15 are fixed on a bearing block 18 and an end cover 16; the outer diameter of the nut screw 5 is made into a large-lead ball screw, a multi-head thread is adopted, the large-lead ball screw is matched with a large-lead ball nut 10 to form a large-lead ball screw pair, end face ball returning devices 9 are designed on two end faces of the nut screw 5, and a first steel ball 8 is reversely circulated through the end face ball returning devices 9; a second supporting shaft 12 is arranged between the large-lead ball nut 10 and the outer sleeve 11; the end cover 16 and the bearing seat 18 are fixed to the outer sleeve 11 by fastening screws 13 and fixing pins 17.
The working principle is as follows: the motor 1 is decelerated by the speed reducer 2 to drive the small-lead ball screw 3 to rotate, the nut screw 5 (the inner diameter is a ball nut and is matched with the small-lead ball screw 3, the outer diameter is a large-lead ball screw and is matched with the large-lead ball nut 10) can only move back and forth due to the limitation of the guide shaft 15, the outer diameter of the nut screw 5 is the large-lead ball screw and is matched with the large-lead ball nut 10 to form a ball screw pair, when the nut screw 5 moves back and forth, the large-lead ball nut 10 is driven to rotate, the large-lead ball nut 10 is connected with the rotating arm 7, and the rotating arm 7 is driven to rotate.
The moment increase principle: the small lead ball screw pair operates in a mode that the small lead ball screw 3 rotates and the nut screw 5 moves linearly, belongs to a forward transmission mode and has the transmission efficiency of 0.9-0.95 generally; the operation mode of the large-lead ball screw pair is that the small-lead ball screw 3 makes linear motion and the large-lead ball nut 10 rotates, belongs to a reverse transmission mode, and has transmission efficiency which is slightly lower than that of the forward motion and is generally 0.8-0.85.
The formula of the driving torque required by the external load of the small-lead ball screw pair is as follows:
m1 ═ F × P1 ÷ (2 ii × η 1 × 1000) units n.m
Wherein: m1-driving torque required by the external load of the small-lead ball screw pair;
f, axial load of the small lead ball screw pair;
П＝3.14；
eta 1-transmission efficiency of small lead ball screw pair;
p1-lead of small lead ball screw pair;
the formula of the driving torque required by the external load of the large-lead ball screw pair is as follows:
m2 ═ (F × P2 × η 2) ÷ (2 ii × 1000) units n.m
Wherein: m2 driving torque required by external load of the ball screw pair;
f, axial load of the large-lead ball screw pair;
П＝3.14；
eta 2-reverse transmission efficiency of the large-lead ball screw pair;
p2 — lead of large lead ball screw pair;
the following two formulas are obtained:
M2/M1＝P2/P1(η1×η2)
the transmission efficiency of the small-lead ball screw pair is equal to 0.9 as eta 1; the transmission efficiency of the large-lead ball screw pair is equal to 0.8 by eta 2. Can be derived from
M2/M1≈0.72×P2÷P1
M2≈M1×0.72×P2/P1
As can be seen from the above equation, when the lead P1 of the ball screw pair with a small lead becomes small and the lead P2 of the ball screw pair becomes large, the output torque M2 becomes large, and the larger the lead ratio between them, the larger the output torque becomes.
The utility model discloses with the ball screw of a little helical pitch vice with a big helical pitch ball vice nested each other together, realized turning into big output torque function with little input torque, can increase more than 50 times, receive space restriction at some, can make rotary part obtain very big drive moment, have fine application prospect.
Claims (3)
1. A ball screw pair combination nested with each other comprises a motor (1), a speed reducer (2), a nut screw (5), an outer sleeve (11), a bearing seat (18) and an end cover (16), and is characterized in that the inner diameter of the nut screw (5) is formed by matching a ball nut and a small-lead ball screw (3) to form a small-lead ball screw pair; the outer diameter of the nut screw (5) is made into a large-lead ball screw, and a large-lead ball screw pair is formed by matching a multi-head thread with a large-lead ball nut (10); end face ball returning devices (9) are arranged on two end faces of the nut screw (5); the nut screw (5) is guided by a guide shaft (15), and two ends of the guide shaft (15) are fixed on the bearing block (18) and the end cover (16); the large-lead ball nut (10) is connected with the rotating arm (7); the guide shaft (15) limits the nut screw (5) to move only forwards and backwards, when the nut screw (5) moves forwards and backwards, the large-lead ball nut (10) is driven to rotate, and the large-lead ball nut (10) drives the rotating arm (7) to rotate.
2. A nested ball screw pair combination according to claim 1, characterised in that the motor (1) is coupled to the reduction gear (2), the reduction gear (2) is coupled to the low lead ball screw (3), and the low lead ball screw (3) is coupled to the bearing block (18) via a first bearing shaft (4).
3. A nested ball screw set combination according to claim 1, characterised in that a second bearing shaft (12) is provided between the large-lead ball nut (10) and the outer sleeve (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120010714.6U CN215214613U (en) | 2021-01-04 | 2021-01-04 | Mutually-nested ball screw pair combination |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120010714.6U CN215214613U (en) | 2021-01-04 | 2021-01-04 | Mutually-nested ball screw pair combination |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215214613U true CN215214613U (en) | 2021-12-17 |
Family
ID=79437133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120010714.6U Active CN215214613U (en) | 2021-01-04 | 2021-01-04 | Mutually-nested ball screw pair combination |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215214613U (en) |
-
2021
- 2021-01-04 CN CN202120010714.6U patent/CN215214613U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110715035B (en) | Internal support multi-stage electric cylinder | |
| CN104141738A (en) | A worm and worm gear decelerating mechanism | |
| CN215214613U (en) | Mutually-nested ball screw pair combination | |
| CN203230793U (en) | Worm and gear reducing mechanism | |
| CN112953103B (en) | Composite rotor motor direct-drive reciprocating device | |
| CN110103018A (en) | PWG type differential type planetary roller screw assembly tool and its assembly method | |
| CN110912448B (en) | Piezoelectric driving platform based on asymmetric triangle flexible hinge mechanism | |
| CN208055370U (en) | A kind of microfiber leather rubs skin machine | |
| CN214520195U (en) | Be applied to straining device of rope drive robot | |
| CN202334134U (en) | Double-turbine reducer motor | |
| CN214999210U (en) | Device for realizing reciprocating motion of fracturing pump through rotation of screw rod nut | |
| CN101888140B (en) | Reduction gearbox of motor | |
| CN211501523U (en) | Thread type linear motion mechanism | |
| CN212564146U (en) | Reverse-transmission bidirectional self-locking mechanism | |
| CN221428707U (en) | Double-control servo electric cylinder | |
| CN215214612U (en) | Ball screw pair rotating mechanism | |
| CN110657214A (en) | Multistage planet roller screw drive structure | |
| CN108843764A (en) | A kind of double transmission ratio harmonic gear reducers | |
| CN216478757U (en) | Circulating reciprocating mechanism | |
| CN215634851U (en) | Bidirectional output type gear box | |
| CN215897487U (en) | Heavy-load electric cylinder structure | |
| CN218894922U (en) | Mechanism for converting external kinetic energy into rotary mechanical energy | |
| CN212338039U (en) | Novel gear reduction mechanism | |
| CN221736186U (en) | Clamping jaw | |
| CN221736159U (en) | ZR axle structure of lightweight adaptation linear electric motor and contain robot of this structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |