CN215110356U

CN215110356U - Ball screw device

Info

Publication number: CN215110356U
Application number: CN202120941821.0U
Authority: CN
Inventors: 屠灵华
Original assignee: Hangzhou Taihao Hewang Transmission Technology Co ltd
Current assignee: Hangzhou Taihao Hewang Transmission Technology Co ltd
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2021-12-10
Anticipated expiration: 2031-04-30

Abstract

The utility model relates to a screw rod ball motion module discloses a ball screw device, including screw rod and the nut of slip on the screw rod, be equipped with spiral helicine first roll track between screw rod and the nut, be equipped with quantity in the first roll track and be a plurality of ball, install on the nut and be used for supplying the rolling circulator of ball circulation, be equipped with second roll track on the circulator, the orbital both ends of second roll all communicate with first roll track, be equipped with the mounting groove that is used for installing the circulator on the nut, the mounting groove opposite angle department all is equipped with the mounting hole with first roll track intercommunication, the lower terminal surface of circulator is equipped with the pipe that communicates with second roll track, the pipe communicates first roll track through the mounting hole. The ball screw device does not need to be provided with a retainer to separate balls, simultaneously overcomes the problem of the size of the internal circulation external diameter of a microminiature screw cap, overcomes the problem that the position of an old iron pipe inlet and outlet nozzle is unstable, overcomes the problem that a nail cannot be arranged at the position of the nozzle opening, and overcomes the problem that the old assembly is complicated.

Description

Ball screw device

Technical Field

The utility model relates to a screw rod ball motion module especially relates to a ball screw device.

Background

The principle of the ball screw is that the screw rotates to drive the nut thereon to move along the axial direction thereof, and the nut is connected with the screw through the ball, so that the friction resistance is small when the nut moves on the screw, for example, the ball screw module and the circulating device thereof with application number 200810160834.3 have a retainer for bearing the ball in addition to the screw, the nut, the ball and the circulating device, and the retainer is also made into a spiral shape because the path of the ball is spiral, and the retainer is also closed. The retainer passes through the circulating device, so that the balls can roll circularly, and the retainer and the circulating device need to be tightly matched to ensure that the balls can smoothly pass through the circulating device. Therefore, the traditional ball screw has a more complex structure, lower manufacturing and assembling efficiency and higher cost requirement.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the shortcoming that ball screw made and assembly efficiency is low among the prior art, provide a ball screw device.

In order to solve the technical problem, the utility model discloses a following technical scheme can solve:

the utility model provides a ball screw device, include the screw rod and slide the nut on the screw rod, be equipped with spiral helicine first roll track between screw rod and the nut, be equipped with quantity in the first roll track and be a plurality of ball, install on the nut and be used for supplying the rolling circulator of ball circulation, be equipped with second roll track on the circulator, second roll orbital both ends all communicate with first roll track, be equipped with the mounting groove that is used for installing the circulator on the nut, mounting groove diagonal angle department all is equipped with the mounting hole with first roll track intercommunication, the lower terminal surface of circulator is equipped with the pipe with second roll track intercommunication, the pipe communicates first roll track through the mounting hole. The ball screw device does not need to be provided with a retainer to separate balls, simultaneously overcomes the problem of the size of the internal circulation external diameter of a microminiature screw cap, overcomes the problem that the position of an old iron pipe inlet and outlet nozzle is unstable, overcomes the problem that a nail cannot be arranged at the position of the nozzle opening, and overcomes the problem that the old assembly is complicated.

Preferably, a spiral first rolling groove is formed in the screw, a second rolling groove is formed in the nut, the first rolling groove and the second rolling groove are combined to form a first rolling track, a pushing portion is arranged at a port of a conduit extending into the first rolling groove and comprises a first arc surface, a second arc surface and a positioning block, the first arc surface extends into the second rolling groove, a gap is formed between the first arc surface and the second rolling groove, the second arc surface is arranged on two sides of the first arc surface, the first arc surface extends to the positioning block, the positioning block is arranged on two sides of a port of the conduit, and the positioning block is pressed on outer circumferential side walls of two sides of the first rolling groove. The pushing and pulling portion can enable the circulator to be located and installed on the nut, the pushing and pulling portion enters the first rolling track, the balls can be effectively caught through the structural form, and the balls can conveniently enter the second rolling track smoothly.

Preferably, the circulator comprises a first circulating block and a second circulating block, the first circulating block is provided with a first circulating groove, the second circulating block is provided with a second circulating groove, and the first circulating groove and the second circulating groove are combined to form a second rolling track. The circulator is a split type circulating component, a second rolling track is conveniently formed, and the first circulating groove and the second circulating groove are arc-shaped grooves or linear grooves. The design can be designed to minimize the outer diameter of the nut in response to the outer diameter of the nut and reduce the resistance to cycling at high speed due to the bending angle of the arc.

Preferably, the lower end face of the first circulation block is integrally formed with a first half pipe, the lower end face of the second circulation block is integrally formed with a second half pipe, and the first half pipe and the second half pipe are combined to form a hollow pipe. The guide pipe is a split type guide pipe, so that the mold opening manufacturing of the first circulating block is facilitated.

Preferably, the lower end face of the first circulating block is integrally formed with a first half positioning column, the lower end face of the second circulating block is integrally formed with a second half positioning column, the first half guide pipe is integrally formed on the lower end face of the first half positioning column, the second half guide pipe is integrally formed on the lower end face of the second half positioning column, the first half positioning column and the second half positioning column are combined to form a hollow positioning column communicated with the guide pipe, the lower end face of the circulator is provided with a positioning column communicated with the guide pipe, and the circumferential diameter of the positioning column is larger than that of the guide pipe. The reference column is split type reference column, and it is comparatively simple with the circulation piece integrated into one piece that corresponds, and mould structural design improves product efficiency of producing. And meanwhile, the positioning column is used for assisting in positioning the guide pipe, so that the circulator can be quickly and accurately installed on the nut.

Preferably, the central axis of the positioning column is parallel to the central axis of the conduit, and the conduit is arranged on the outer side edge of the positioning column. The positioning columns and the guide pipes are arranged in a staggered mode, so that the pipeline on the guide pipes is smoothly connected with the second rolling groove on the nut, and the balls can smoothly enter the second rolling track conveniently.

Preferably, the outer side surface of the circulator is an arc-shaped surface, and the outer side surface of the circulator and the outer circumferential surface of the nut are on the same circumferential surface.

The utility model discloses owing to adopted above technical scheme, have apparent technological effect:

the ball screw device does not need to be provided with a retainer to separate balls, simultaneously overcomes the problem of the size of the internal circulation external diameter of a microminiature screw cap, overcomes the problem that the position of an old iron pipe inlet and outlet nozzle is unstable, overcomes the problem that a nail cannot be arranged at the position of the nozzle opening, and overcomes the problem that the old assembly is complicated.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a structural view of fig. 1 without the mounting screw.

FIG. 3 is a schematic sectional view A-A of FIG. 2.

Fig. 4 is a schematic view of the structure of fig. 1 without a circulator installed.

Fig. 5 is a schematic view of the structure of the circulator.

Fig. 6 is a schematic structural diagram of the first loop block of fig. 5.

Fig. 7 is a schematic view of the structure of fig. 1 without the nut.

The names of the parts indicated by the numerical references in the above figures are as follows: 1-screw rod, 2-nut, 3-ball, 4-circulator, 11-first rolling groove, 21-mounting groove, 22-mounting hole, 23-second rolling groove, 41-second rolling track, 42-guide pipe, 43-pulling part, 44-first circulation block, 45-second circulation block, 46-positioning column, 421-first half guide pipe, 422-first half guide pipe, 431-first cambered surface, 432-second cambered surface, 433-positioning block, 441-first circulation groove, 461-first half positioning column, 462-second half positioning column.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings 1-7 and examples.

Example 1

The utility model provides a ball screw device, includes screw rod 1 and the nut 2 of slip on screw rod 1, is equipped with spiral helicine first roll track between screw rod 1 and the nut 2, is equipped with quantity in the first roll track and is a plurality of ball 3, and screw rod 1 rotates and can drives 2 sharp slides of nut above that, connects through ball 3 between the two to make nut 2 move more smooth and easy on screw rod 1. The nut 2 is provided with a circulator 4 for circulating the balls 3, and the circulator 4 is equivalent to a bridge and connects the first rolling tracks at both ends of the screw 1 so that the balls 3 can circulate between the screw 1 and the nut 2. The circulator 4 is provided with a second rolling rail 41, the second rolling rail 41 can be an arc rail or a linear rail, the second rolling rail 41 of the embodiment is an arc rail, the structure can be designed to match the requirement of the outer diameter of the nut 2, the outer diameter of the nut 2 can be designed to be the minimum limit, and the resistance in circulation is reduced due to the bending angle of the arc line during high-speed operation. Both ends of the second rolling rail 41 are communicated with the first rolling rail, the nut 2 is provided with a mounting groove 21 for mounting the circulator 4, the diagonal positions of the mounting groove 21 are provided with mounting holes 22 communicated with the first rolling rail, the lower end surface of the circulator 4 is provided with a guide pipe 42 communicated with the second rolling rail 41, and the guide pipe 42 is communicated with the first rolling rail through the mounting holes 22. The nut 2 is designed to be processed only on one side without being turned over on other sides. The nut 2 is processed with the mounting hole 22 as a positioning ring as a processing reference. The nut 2 can thus be designed at the shortest thread to achieve the most efficient loading.

The screw 1 is provided with a spiral first rolling groove 11, the nut 2 is provided with a second rolling groove 23, the first rolling groove 11 and the second rolling groove 23 are combined to form a first rolling track, a gap is formed between the first rolling groove 11 and the second rolling groove 23, and the first rolling groove 11 and the second rolling groove 23 are not attached. The port of the conduit 42 extending into the first rolling groove 11 is provided with a push-pull part 43, and the push-pull part 43 facilitates quick positioning and installation of the circulator on the nut 2 on one hand and facilitates smooth entering of the balls 3 into the second rolling track 41 on the other hand. The tapered portion 43 includes a first curved surface 431, a second curved surface 432 and a positioning block 433, and the first curved surface 431 extends into the second rolling groove 23. The first cambered surface 431 is convex outwards, and a gap is formed between the first cambered surface 431 and the second rolling groove 23, and the gap prevents the guide pipe 2 from touching the screw rod 1, so that the assembly between the screw rod 1 and the nut 2 is influenced. The second arc surfaces 432 are arranged on two sides of the first arc surface 431, and a gap is also arranged between the second arc surfaces 432 and the outer circumferential surface of the screw rod 1, and the gap is also used for preventing the guide pipe 42 from touching the screw rod 1. The first arc 431 extends to the positioning block 433, the positioning blocks 433 are disposed on both sides of the port of the catheter 42, and the positioning blocks 433 are pressed on the outer circumferential sidewalls of both sides of the first rolling groove 11.

The circulator 4 includes a first circulation block 44 and a second circulation block 45, a first circulation groove 441 is disposed on the first circulation block 44, a second circulation groove is disposed on the second circulation block 45, and the first circulation groove 441 and the second circulation groove are combined to form the second rolling rail 41. The circulator 4 is a split type circulating member, which facilitates formation of the second rolling rail 41, and the first circulating groove 441 and the second circulating groove are arc-shaped grooves.

The lower end face of the first circulating block 44 is integrally formed with a first half conduit 421, the lower end face of the second circulating block 45 is integrally formed with a second half conduit 422, and the first half conduit 421 and the second half conduit 422 are combined to form a hollow conduit 42, so that the conduit 42 can be conveniently processed by people, and meanwhile, the connecting strength of the conduit 42 on the circulator 4 is also improved.

Example 2

The embodiment 2 has substantially the same features as the embodiment 1, except that the lower end of the first circulating block 44 is integrally formed with a first half positioning post 461, the lower end of the second circulating block 45 is integrally formed with a second half positioning post 462, the first half conduit 421 is integrally formed on the lower end face of the first half positioning post 461, the second half conduit 422 is integrally formed on the lower end face of the second half positioning post 462, the first half positioning post 461 and the second half positioning post 462 are combined to form a hollow positioning post 46 communicated with the conduit 42, and the split positioning post 46 facilitates the processing of people and improves the connection strength of the positioning post 46 on the circulator 4. The lower end surface of the circulator 4 is provided with a positioning column 46 communicated with the conduit 42, and the circumferential diameter of the positioning column 46 is larger than that of the conduit 42.

The central axis of the positioning post 46 is parallel to the central axis of the conduit 42, and the conduit 42 is disposed on the outer side of the positioning post 46. The positioning columns 46 and the guide pipes 42 are designed to be staggered, so that the pipes on the guide pipes 42 are smoothly connected with the second rolling grooves 23 on the screw caps 2, and the balls 3 can smoothly enter the second rolling tracks 41.

Example 3

The embodiment 3 has basically the same characteristics as the embodiment 1 or 2, except that the outer side surface of the circulator 4 is an arc-shaped surface, the outer side surface of the circulator 4 and the outer circumferential surface of the nut 2 are on the same circumferential surface, the structure between the outer side surface of the circulator 4 and the outer circumferential surface of the nut 2 is compact, and a technician can conveniently install the nut 2 in other parts.

Claims

1. The utility model provides a ball screw device, includes screw rod (1) and slide nut (2) on screw rod (1), be equipped with spiral helicine first roll track between screw rod (1) and nut (2), be equipped with ball (3) that quantity is a plurality of in the first roll track, install circulator (4) that are used for supplying ball (3) to circulate to roll on nut (2), be equipped with second roll track (41) on circulator (4), the both ends of second roll track (41) all communicate with first roll track, its characterized in that: the nut (2) is provided with a mounting groove (21) for mounting the circulator (4), mounting holes (22) communicated with the first rolling rail are formed in opposite angles of the mounting groove (21), a guide pipe (42) communicated with the second rolling rail (41) is arranged on the lower end face of the circulator (4), and the guide pipe (42) is communicated with the first rolling rail through the mounting holes (22).

2. The ball screw device according to claim 1, wherein: a spiral first rolling groove (11) is arranged on the screw rod (1), a second rolling groove (23) is arranged on the screw cap (2), the first rolling groove (11) and the second rolling groove (23) are combined to form a first rolling track, a pushing and pulling part (43) is arranged at the port of a guide pipe (42) extending into the first rolling groove (11), the pushing and pulling part (43) comprises a first cambered surface (431), the guide pipe comprises a second cambered surface (432) and positioning blocks (433), the first cambered surface (431) extends into the second rolling groove (23), a gap is formed between the first cambered surface (431) and the second rolling groove (23), the second cambered surface (432) is arranged on two sides of the first cambered surface (431), the first cambered surface (431) extends to the positioning blocks (433), the positioning blocks (433) are arranged on two sides of a port of the guide pipe (42), and the positioning blocks (433) are pressed on the outer circumferential side walls of two sides of the first rolling groove (11).

3. The ball screw device according to claim 1, wherein: the circulator (4) comprises a first circulating block (44) and a second circulating block (45), a first circulating groove (441) is formed in the first circulating block (44), a second circulating groove is formed in the second circulating block (45), and the first circulating groove (441) and the second circulating groove are combined to form a second rolling track (41).

4. A ball screw apparatus according to claim 3, wherein: the lower end face angle of the first circulating block (44) is integrally formed with a first half conduit (421), the lower end face angle of the second circulating block (45) is integrally formed with a second half conduit (422), and the first half conduit (421) and the second half conduit (422) are combined to form a hollow conduit (42).

5. The ball screw device according to claim 4, wherein: the lower end face of the first circulating block (44) is provided with a first half positioning column (461) in an integrated forming mode, the lower end face of the second circulating block (45) is provided with a second half positioning column (462) in an integrated forming mode, the first half guide pipe (421) is formed on the lower end face of the first half positioning column (461) in an integrated forming mode, the second half guide pipe (422) is formed on the lower end face of the second half positioning column (462) in an integrated forming mode, the first half positioning column (461) and the second half positioning column (462) are combined to form a hollow positioning column (46) communicated with the guide pipe (42), the lower end face of the circulator (4) is provided with a positioning column (46) communicated with the guide pipe (42), and the circumferential diameter of the positioning column (46) is larger than that of the guide pipe (42).

6. The ball screw device according to claim 5, wherein: the central axis of the positioning column (46) is parallel to the central axis of the guide pipe (42), and the guide pipe (42) is arranged on the outer side edge of the positioning column (46).

7. A ball screw apparatus according to any one of claims 1 to 6, wherein: the outer side surface of the circulator (4) is an arc-shaped surface, and the outer side surface of the circulator (4) and the outer circumferential surface of the screw cap (2) are on the same circumferential surface.