CN213176687U

CN213176687U - Ball screw

Info

Publication number: CN213176687U
Application number: CN202021814936.5U
Authority: CN
Inventors: 梁宝东
Original assignee: Taizhou Xinxiangyuan Precision Machinery Co ltd
Current assignee: Taizhou Xinxiangyuan Precision Machinery Co ltd
Priority date: 2020-08-26
Filing date: 2020-08-26
Publication date: 2021-05-11
Anticipated expiration: 2030-08-26

Abstract

The utility model discloses a ball belongs to lead screw technical field, has solved the problem that ball operational reliability is short of, and its technical scheme main points are including lead screw shaft, thread bush and ball, lead screw shaft threaded connection thread bush leaves the clearance that supplies the ball activity in the screw assembly structure between lead screw shaft and the thread bush, the screw thread head end and the screw thread end of thread bush are provided with the switching-over sprue respectively, still be provided with intercommunication screw thread head end and the terminal ball passageway of screw thread on the thread bush, the switching-over sprue is provided with the passageway of bending, the passageway one end intercommunication ball passageway of bending and the other end towards the clearance in the thread assembly structure, be provided with clamping ring portion on the switching-over sprue, clamping ring portion stretches into and the joint is sheathe in the thread bush, has reached improvement ball operational reliability effect.

Description

Ball screw

Technical Field

The utility model relates to a lead screw structure field relates to a ball especially.

Background

Generally speaking, ball mainly comprises screw shaft, nut, ball equipment, and general ball keeps motionless ball relative position, keeps the ball position and carries out rolling friction to realize the screw-thread fit and the rolling friction's between nut and the screw shaft fit mode, this mode is because ball keeps the position motionless, then the life greatly reduced of ball, thereby influences holistic life. There is also a conventional ball screw designed such that balls can be circularly moved, which causes a great difficulty in an assembling manner, and the balls are not easily assembled due to the circular rolling. Or some nuts are provided with a plurality of through holes, balls are filled into the through holes, and then the through holes are blocked. Although this structure allows relatively easy assembly, the plurality of through holes in the nut are prone to have a phenomenon in which the plurality of plugs fall off, and the reliability of use is reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to prior art's weak point, solve the technical problem in the correlation technique to a certain extent at least, provide a ball to reach and improve the assembly convenience, use the high purpose of reliability.

In order to solve the technical problem, the technical scheme of the utility model is that: a ball screw comprises a screw shaft, a threaded sleeve and a ball, wherein the screw shaft is in threaded connection with the threaded sleeve, a gap for the ball to move is reserved in a threaded assembly structure between the screw shaft and the threaded sleeve, a reversing block is arranged at the thread head end and the thread tail end of the threaded sleeve respectively, a ball channel for communicating the thread head end and the thread tail end is further arranged on the threaded sleeve, a bending channel is arranged on the reversing block, one end of the bending channel is communicated with the ball channel, the other end of the bending channel faces the gap in the threaded assembly structure, a clamping ring portion is arranged on the reversing block, and the clamping ring portion stretches into and is clamped on the threaded sleeve.

As a specific aspect of the present invention, it may be preferable that: the ball passage is along the length direction of the threaded sleeve, or the ball passage is inclined along the length direction of the threaded sleeve.

As a specific aspect of the present invention, it may be preferable that: the one end of passageway of bending is circular mouthful, and the other end of passageway of bending is the semicircle mouth, the switching-over sprue is provided with the wedge, two the wedge sets up respectively in the both sides of semicircle mouth.

As a specific aspect of the present invention, it may be preferable that: the reversing blocking piece is provided with a clamping hook portion, the thread sleeve is provided with a ring groove, a clamp spring is arranged on the ring groove, and the clamp spring and the clamping hook portion are clamped and fixed to tightly abut against the reversing blocking piece.

The utility model discloses technical effect mainly embodies in following aspect: because the working mode and the working position of the ball are continuously circulated, the whole ball is uniformly stressed, the abrasion is reduced, the service life is prolonged, the assembly mode of the reversing block is simple and reliable, and the reversing block enables the ball to smoothly transit in the process of movement reversing, so that the impact force is reduced.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment;

FIG. 2 is a side view of the threaded sleeve of the embodiment;

FIG. 3 is a diagram showing a movement locus of balls in the embodiment;

fig. 4 is a schematic structural diagram of the commutation block.

Reference numerals: 1. a screw shaft; 2. a threaded sleeve; 22. a ring groove; 3. a ball bearing; 4. a reversing block; 41. bending the channel; 42. a circular port; 43. a semicircular opening; 44. a wedge block; 45. a hook part; 46. a collar portion; 5. and a clamp spring.

Detailed Description

The embodiments of the present invention will be described in detail below, examples of which are illustrated in the accompanying drawings, and the embodiments described below by referring to the drawings are exemplary and intended to explain the present invention so that the technical solutions of the present invention can be more easily understood and grasped, and cannot be construed as limiting the present invention.

Example (b):

a ball screw, shown with reference to fig. 1, 2 and 3, includes a screw shaft 1, a threaded sleeve 2, and balls. Screw shaft 1 threaded connection thread bush 2, leave the clearance that supplies the ball activity in the screw assembly structure between screw shaft 1 and the thread bush 2, the screw thread head end and the screw thread end of thread bush 2 are provided with switching-over sprue 4 respectively, still be provided with the ball passageway of intercommunication screw thread head end and screw thread end on the thread bush 2, switching-over sprue 4 is provided with bending channel 41, bending channel 41 one end intercommunication ball passageway and the other end towards the clearance in the screw assembly structure, be provided with clamping ring portion 46 on the switching-over sprue 4, clamping ring portion 46 stretches into and the joint is on the thread bush 2.

The assembling process comprises the following steps: firstly, the two end parts of the thread sleeve 2 are provided with the head end and the tail end of a ball channel, a reversing block 4 is fixed at one end part, then a screw is in thread assembly, the ball 3 is put in from the other end of the thread sleeve 2, and then the second reversing block 4 is assembled at the other end part of the thread sleeve 2, thereby completing the installation. The reversing block 4 is fixed in an interference fit manner. In addition, clamping springs 5 can be assembled at two ends of the threaded sleeve 2, and a reversing block 4 is further fixed.

For the design of the ball passage, there are two solutions, the ball passage is along the length direction of the screw sleeve, or the ball passage is inclined along the length direction of the screw sleeve. Referring to fig. 3, the ball passages are inclined.

Referring to fig. 4, one end of the bending channel 41 is a circular opening 42, the other end of the bending channel 41 is a semi-circular opening 43, the reversing block 4 is provided with wedge blocks 44, and the two wedge blocks 44 are respectively arranged at two sides of the semi-circular opening 43. This structure can effectively change the moving direction of the balls 3 so that the balls 3 can move circularly.

Referring to fig. 2 and 4, a hook portion 45 is arranged on the reversing block 4, a ring groove 22 is arranged on the thread sleeve 2, a snap spring 5 is arranged on the ring groove 22, and the snap spring 5 and the hook portion 45 are clamped and fixed to tightly abut against the reversing block 4.

According to the design structure, as the working mode and the working position of the ball 3 are continuously circulated, the stress of the whole ball 3 is uniform, the abrasion is reduced, the service life is prolonged, the assembly mode of the reversing block 4 is simple and reliable, and the reversing block 4 enables the ball 3 to smoothly transit in the process of movement reversing, so that the impact force is reduced. So that the reliability of the whole structure is improved.

Of course, the above is only a typical example of the present invention, and besides, the present invention can also have other various specific embodiments, and all technical solutions adopting equivalent replacement or equivalent transformation are all within the scope of the present invention as claimed.

Claims

1. The ball screw comprises a screw shaft, a threaded sleeve and balls and is characterized in that the screw shaft is in threaded connection with the threaded sleeve, a gap for the balls to move is reserved in a threaded assembly structure between the screw shaft and the threaded sleeve, a reversing block is arranged at the thread head end and the thread tail end of the threaded sleeve respectively, a ball channel communicated with the thread head end and the thread tail end is further arranged on the threaded sleeve, a bending channel is arranged on the reversing block, one end of the bending channel is communicated with the ball channel, the other end of the bending channel faces the gap in the threaded assembly structure, a clamping ring portion is arranged on the reversing block, and the clamping ring portion stretches into and is clamped on the threaded sleeve.

2. The ball screw of claim 1, wherein: the one end of passageway of bending is circular mouthful, and the other end of passageway of bending is the semicircle mouth, the switching-over sprue is provided with the wedge, two the wedge sets up respectively in the both sides of semicircle mouth.

3. The ball screw of claim 1, wherein: the reversing blocking piece is provided with a clamping hook portion, the thread sleeve is provided with a ring groove, a clamp spring is arranged on the ring groove, and the clamp spring and the clamping hook portion are clamped and fixed to tightly abut against the reversing blocking piece.