CN102966711A

CN102966711A - External circulation type ball screw with muffling structure

Info

Publication number: CN102966711A
Application number: CN2009101638108A
Authority: CN
Inventors: 刘宪正; 徐瑞隆
Original assignee: Hiwin Technologies Corp
Current assignee: Hiwin Technologies Corp
Priority date: 2009-08-05
Filing date: 2009-08-05
Publication date: 2013-03-13
Anticipated expiration: 2029-08-05
Also published as: CN102966711B

Abstract

The invention discloses an external circulation type ball screw with a muffling structure. The external circulation type ball screw stem comprises a screw stem with a rolling channel on the outer circumferential surface, a screw cap with a perforation and a rolling groove, a circulation element with a circulation path and a plurality of rolling elements, wherein the rolling channel and the rolling groove form a load path, the load path and the circulation path are communicated with each other, and the rolling elements are put in the two paths to circularly roll. The external circulation type ball screw is characterized in that a muffling cover is arranged outside the screw cap and has a muffling channel, and the two ends of the muffling channel correspond to the collision parts of the rolling elements and the circulation element. A muffling channel structure is designed to transfer noise to the muffling channel to be offset, so that the noise which is generated when the circulation element collides with the rolling elements can be lowered, and the purpose of lowering the noise which is generated when the ball screw actuates can be realized.

Description

External circulation type ball bolt with noise-reducing structure

Technical field

The present invention relates to a kind of external circulation type ball bolt, particularly a kind of external circulation type ball bolt with noise-reducing structure.

Background technique

As shown in Figure 1, the figure illustrates the generalized section of external circulation type ball bolt commonly used, this external circulation type ball bolt includes a screw rod 11, has sliding channel 111 on its external peripheral surface; A nut 12, it has the perforation 121 that places for described screw rod 11, and these 121 hole walls of boring a hole have rolling groove 122, and this rolling groove 122 forms a load path 13 with described sliding channel 111; A circulating element 14, it has a circulating path 141, and this circulating element 14 is located at described nut 12 outsides, and described circulating path 141 and described load path 13 communicate; A plurality of rolling elements 15, it is in described load path 13 and described circulating path 14 interior circulating rollings.Yet external circulation type ball bolt commonly used has the defective that need improve immediately when action, and defective is as described below:

At first, because described circulating element 14 is outsides of being located at described nut 12, and the noise source of described external circulation type ball bolt maximum comes from the turning 141a of the described circulating path 141 of rolling element 15 bump and rolling element 15 at the bump grating of circulating path 141 interior rolling types, therefore so that the noise source position of this external circulation type ball bolt expose, produce great noise when causing its action, using effect is unsatisfactory.

Secondly, such as U. S. Patent the 5373755th, 5653145 and No. 20080127764 cases, although all be that the mode of strengthening standing finish forms cover plate, reducing described circulating element is scrolled and does not have violent oscillation phenomenon under the element high speed impact and occur, but the high frequency noise that described rolling element produces in circulating path turning place still can leak out, and using effect is still undesirable.

At last, such as U. S. Patent the 5974908th and No. 6668672 cases, Japan Patent the 2007247720th, 2005308081,2004156767,2004116688 and No. 2002276764 cases, all through fixed element circulating path is wrapped by fully, even in blanket processed is arranged, although these Patent Cases can reduce the high frequency noise that rolling element produces in circulating path turning place, but because described these fixed elements there is no the structural design in noise reduction road, only be that thickness by described fixed element reduces noise, and the wall thickness of described fixed element really is subject to the restriction of screw rod external diameter, therefore cause the wall thickness of fixed element excessively thin, screening effect for sound is limited, so can't effectively reduce noise, using effect is undesirable equally.

Accordingly, how to develop a kind of external circulation type ball bolt of above defective that can solve according to the motivation that just becomes this case invention.

Summary of the invention

Technical problem to be solved by this invention provides a kind of external circulation type ball bolt with noise-reducing structure, the noise in the time of mainly can reducing this ball screw action.

For solving the problems of the technologies described above, a kind of technological scheme with external circulation type ball bolt of noise-reducing structure of the present invention is that this external circulation type ball bolt with noise-reducing structure includes: a screw rod, a nut, circulating element, a plurality of rolling element and a noise reduction lid; Described screw rod has sliding channel on its external peripheral surface; Described nut, it has the perforation that places for described screw rod, and this perforation hole wall has rolling groove, and this rolling groove and described sliding channel form a load path; Described circulating element, it has a circulating path, and it is outside that described circulating element is located at described nut, and described circulating path and described load path communicate; Described rolling element, it is circulating rolling in described load path and described circulating path; Described noise reduction lid, it is outside that it is located at described nut, and described noise reduction lid has a noise reduction road, the bump place of the corresponding described rolling element in these two ends, noise reduction road and described circulating element.

Described noise reduction lid also has following structural design in addition, it is described noise reduction lid, it is outside that it is located at described nut, described noise reduction lid has conduit and a noise reduction road that is communicated with this conduit that covers and be positioned on the described circulating element, the bump place of the corresponding described rolling element in these two ends, noise reduction road and described circulating element.

Description of drawings

The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments:

Fig. 1 is the generalized section of external circulation type ball bolt commonly used;

Fig. 2 is three-dimensional exploded view of the present invention;

Fig. 3 is three-dimensional combination figure of the present invention;

Fig. 4 is action schematic representation of the present invention.

Embodiment

At first be depicted as a kind of external circulation type ball bolt with noise-reducing structure that the embodiment of the invention provides such as Fig. 2,3, this ball screw includes: a screw rod 21 has sliding channel 211 on its external peripheral surface; A nut 22, it has the perforation 221 that places for described screw rod 21, and these 221 hole walls of boring a hole have rolling groove 222, and this rolling groove 222 forms a load path 26 with described sliding channel 211; First circulating element 23, it has a circulating path 231, and this first circulating element 23 is located at described nut 22 outsides, and described circulating path 231 and described load path 26 communicate; Second circulating element 24, it has a circulating path 241, and this second circulating element 24 is located at described nut 22 outsides, and described circulating path 241 and described load path 26 communicate; A plurality of rolling elements 25, it is in described load path 26 and described two circulating paths 231,241 interior circulating rollings.

Special design part of the present invention is: described nut 22 outsides are provided with a noise reduction lid 30, this noise reduction lid 30 is to lock in the outside of described nut 22 by screw 41, and this noise reduction lid 30 has first conduit 31 with head end 311 and tail end 312, second conduit 32 with head end 321 and tail end 322, a first noise reduction road 33 with head end 331 and tail end 332, a second noise reduction road 34 with head end 341 and tail end 342, the 3rd a noise reduction road 35 with head end 351 and tail end 352, the 4th a noise reduction road 36 with head end 361 and tail end 362.Wherein be connected the connection positioning relation with the noise reduction road as follows for each conduit:

Described the first conduit 31 is circulating path 231 outsides that cover the location and closely abut in described the first circulating element 23, and the bump place of the circulating path 231 of the head of described the first conduit 31, tail end 311, the corresponding described rolling element 25 of 312 difference and described the first circulating element 23, the turning 232,233 that this bump place is exactly described the first circulating element 23.

Described the second conduit 32 is circulating path 241 outsides that cover the location and closely abut in described the second circulating element 24, and the bump place of the circulating path 241 of the head of described the second conduit 32, tail end 321, the corresponding described rolling element 25 of 322 difference and described the second circulating element 24, the turning 242,243 that this bump place is exactly described the second circulating element 24.

Head end 331 and the tail end 332 in described the first noise reduction road 33 is communicated in respectively the head end 311 and tail end 312 of described the first conduit 31, make the bump place of the corresponding described rolling element 25 of head, tail end 331,332 difference with described first circulating element 23 in described the first noise reduction road 33, i.e. the turning 232,233 of described the first circulating element 23.

Head end 341 and the tail end 342 in described the second noise reduction road 34 is communicated in respectively the head end 321 and tail end 322 of described the second conduit 32, make the bump place of the corresponding described rolling element 25 of head, tail end 341,342 difference with described second circulating element 24 in described the second noise reduction road 34, i.e. the turning 242,243 of described the second circulating element 24.

The head end 351 in described the 3rd noise reduction road 35 and tail end 352 are communicated in respectively described first and

second conduit

31,32 head end 311,321, the head, tail end 351,352 that makes described the 3rd noise reduction road 35 be corresponding described rolling element 25 and described first and second circulating element 23,24 bump place respectively, i.e. described first and second circulating element 23,24 turning 232,242.

The head end 361 in described the 4th noise reduction road 36 and tail end 362 are communicated in respectively described first and

second conduit

31,32 head end 312,322, the head, tail end 361,362 that makes described the 4th noise reduction road 36 be corresponding described rolling element 25 and described first and second circulating element 23,24 bump place respectively, i.e. described first and second circulating element 23,24 turning 233,243.

More than be structure and the configuration explanation of each main member of the embodiment of the invention.

Manner of execution and the effect thereof of the embodiment of the invention are as described below, shown in Fig. 2,4.

When described external circulation type ball bolt action, described rolling element 25 can be at the circulating path 231 interior circulating rollings of described the first circulating element 23, and can be at the turning 232 of described the first circulating element 23,233 produce noise, at this moment, this noise can reach the head end 311 and tail end 312 of the first conduit 31 of described noise reduction lid 30 simultaneously, and since the present invention in 31 of this first conduits, tail end 311,312 are designed with first a noise reduction road 33 that is communicated with, therefore, noise (as shown by the arrows in Figure 4) meeting is entered with tail end 332 simultaneously by the head end 331 in this first noise reduction road 33 simultaneously, and when this noise meets in described the first noise reduction road 33, can make these two sound waves carry out destructive interference, and the effect of cancelling each other is arranged, therefore can effectively reduce the generation of noise.Equally, be communicated with the second noise reduction road 34 of design with tail end 322 places at described the second conduit 32 head ends 321, can reduce described rolling element 25 at the turning 242 of described the second circulating element 24,243 noise generated.

In addition, when described external circulation type ball bolt action, described rolling element 25 can be simultaneously described first, two circulating elements 23,24 turning 232,233,242,243 produce noise, at this moment, this noise can reach first of described noise reduction lid 30 simultaneously, two

conduits

31,32 head end 311,321 with tail end 312,322, and since the present invention described first, two

conduits

31,32 head end 311, be designed with the 3rd a noise reduction road 35 that is communicated with between 321, and described first, two

conduits

31,32 tail end 312, be designed with the 4th a noise reduction road 36 that is communicated with between 322, therefore, noise (as shown by the arrows in Figure 4) the meeting while is by the head end 351 in described the 3rd noise reduction road 35 and the 4th noise reduction road 36,361 with tail end 352,362 enter simultaneously, and work as described noise the described the 3rd, four noise reduction roads 35, when meeting in 36, can make described two sound waves carry out destructive interference and cancel each other, can strengthen reducing like this effect of noise.

Accordingly, present embodiment is except covering the design that coats described circulating element fully by described noise reduction lid, reducing described circulating element is scrolled outside the noise that element bump produces, each the noise reduction road structural design that covers by noise reduction especially, so that noise can be cancelled each other after reaching in each noise reduction road, strengthen to reduce in this way described circulating element and be scrolled the noise that the element bump produces, be with, the present invention reduces the purpose of noise in the time of really can reaching described ball screw action.

Claims

1. the external circulation type ball bolt with noise-reducing structure is characterized in that: include a screw rod, a nut, circulating element, a plurality of rolling element and a noise reduction lid; Described screw rod has sliding channel on its external peripheral surface; Described nut, it has the perforation that places for described screw rod, and this perforation hole wall has rolling groove, and this rolling groove and described sliding channel form a load path; Described circulating element, it has a circulating path, and it is outside that described circulating element is located at described nut, and described circulating path and described load path communicate; Described rolling element, it is circulating rolling in described load path and described circulating path; Described noise reduction lid, it is outside that it is located at described nut, and described noise reduction lid has a noise reduction road, the bump place of the corresponding described rolling element in these two ends, noise reduction road and described circulating element.

2. the external circulation type ball bolt with noise-reducing structure is characterized in that: include a screw rod, a nut, circulating element, a plurality of rolling element and a noise reduction lid; Described screw rod has sliding channel on its external peripheral surface; Described nut, it has the perforation that places for described screw rod, and this perforation hole wall has rolling groove, and this rolling groove and described sliding channel form a load path; Described circulating element, it has a circulating path, and it is outside that described circulating element is located at described nut, and described circulating path and described load path communicate; Described rolling element, it is circulating rolling in described load path and described circulating path; Described noise reduction lid, it is outside that it is located at described nut, described noise reduction lid has conduit and a noise reduction road that is communicated with this conduit that covers and be positioned on the described circulating element, the bump place of the corresponding described rolling element in these two ends, noise reduction road and described circulating element.

3. the external circulation type ball bolt with noise-reducing structure as claimed in claim 2, it is characterized in that: described nut outside is provided with the first circulating element and the second circulating element, and described noise reduction lid has first conduit that covers and be positioned on the first circulating element, second conduit that covers and be positioned on the second circulating element, a first noise reduction road that is communicated in described the first conduit two ends, a second noise reduction road that is communicated in described the second conduit two ends, the 3rd noise reduction road and the 4th a noise reduction road that is communicated in the described first and second conduit the other ends that is communicated in described the first and second conduits one end.