CN201787016U

CN201787016U - End cap type ball screw

Info

Publication number: CN201787016U
Application number: CN2010205095255U
Authority: CN
Inventors: 刘宪正; 许多
Original assignee: Hiwin Technologies Corp
Current assignee: Hiwin Technologies Corp
Priority date: 2010-08-30
Filing date: 2010-08-30
Publication date: 2011-04-06
Anticipated expiration: 2020-08-30

Abstract

The utility model relates to an end cap type ball screw, which comprises a screw rod, a screw nut, two end caps and a plurality of rolling pieces. The screw nut is arranged on the screw rod, the rolling pieces are arranged between the screw rod and the screw nut, and the two end caps are respectively arranged on two end faces of the screw nut. A groove and a convex block are respectively arranged on the relative matching faces of the end caps and the screw nut; when the end caps are assembled on the screw nut, the convex block is arranged inside the groove; the groove and the convex block are respectively provided with a half-turning rail; and the two half-turning rails form a turning rail on which the rolling pieces circulate.

Description

The end cover type ball screw

Technical field

The utility model is a kind of linear transmitting assemblies, refers to a kind of ball screw of end cover type return-flow system especially.

Background technique

See also Fig. 1 to shown in Figure 3, be a kind of known end cover type ball screw, comprise: a screw rod 1 which is provided with spiral helicine sliding channel 11, and the cross section is circular; One nut 2, be provided with a penetration hole 21 that supplies this screw rod 1 to wear, these penetration hole 21 inner peripheral surface are provided with the rolling groove 211 of this sliding channel 11 relatively, and this sliding channel 11 and rolling groove 211 constitute a load path, and this load path is installed with wherein for a plurality of roll piece (not shown)s; This nut 2 more is provided with return port 22 and flange 23, and this return port 22 is provided with for axle direction X and runs through this nut 2 both ends of the surface, and this flange 23 is arranged at the both ends of the surface of this nut 2 respectively, is a ring bodies and is provided with around this penetration hole 21; Two end cap 3, be arranged at the both ends of the surface of this nut 2 respectively, this end cap 3 is a ring bodies, the through hole 30 of this ring bodies wears for this screw rod 1, be provided with recessed edge 31 and Turning Roadways 32 in a side of end cap 3, this recessed edge 31 is complementary with this flange 23, and these Turning Roadways 32 two ends connect this return port 22 and load path respectively, supply this roll piece Infinite Cyclic to form a complete circulating path, but the fit system of this known end cap and nut has following problem:

Because end cap is to cooperate by flange and recessed edge with the fit system of nut, but still has rotary freedom between this end cap and the nut, so when assembling, be difficult for making Turning Roadways to be connected mutually with return port and load path, so be very easy between Turning Roadways and return port and the load path produce offset, thereby influence the operation of roll piece; Then need to repair Turning Roadways, load path and return port if eliminate offset, so need the cost long time can assemble a circulating path without offset, so the manufacture cost of ball screw also improves relatively by manpower.Based on the problem points of above-mentioned known techniques, after the design people improves through research, birth of the present utility model is arranged eventually.

The model utility content

The utility model purpose is, researches and develops the end cover type ball screw of a kind of easy assembling location, has improved the problem that can produce offset when Turning Roadways are connected with load path and return port in the known techniques.

For reaching above-mentioned purpose, technical solution of the present utility model is:

A kind of end cover type ball screw, it includes: a screw rod which is provided with spiral helicine sliding channel, and the cross section is circular; One nut, be provided with a penetration hole that supplies this screw rod to wear, this penetration hole inner peripheral surface is provided with the rolling groove of this sliding channel relatively, this sliding channel and rolling groove constitute a load path, this load path is installed with wherein for a plurality of roll pieces, this nut more is provided with return port, and this return port is axle direction setting and the both ends of the surface that run through this nut; Two end cap, be arranged at the both ends of the surface of this nut respectively, this end cap is provided with a perforation that supplies this screw rod to wear, and be respectively equipped with groove and projection on this end cap fitting surface relative with nut, this projection was located in this groove when this end cap was assembled in this nut, and this groove and projection be respectively equipped with half Turning Roadways, and these two halves Turning Roadways constitute Turning Roadways, these Turning Roadways two ends connect this return port and load path respectively, to form the circulating path of complete this roll piece Infinite Cyclic of confession.

This end cap is provided with a guide portion, and this guide portion is connected this roll piece of guiding into and out of these Turning Roadways with these Turning Roadways.

This groove is arranged at the end face of this end cap, and this projection then is arranged at the end face of this nut.

This groove is arranged at the end face of this nut, and this projection then is arranged at the end face of this end cap.

The cross section of these half Turning Roadways is a semicircular arc.

Adopt such scheme, the utility model end cap can constitute Turning Roadways accurately with making the two halves Turning Roadways cooperating of nut relative engagement face upper groove and projection, so not having offset between when Turning Roadways are connected with load path and return port produces, in addition, by cooperating of groove and projection, can limit the rotary freedom of end cap, during assembling, do not need to go again to adjust the problem that Turning Roadways are connected with load path and return port, therefore the utility model can significantly promote the smooth degree of roll piece operation, reduce the chance of roll piece collision relatively, the life-span of roll piece can be prolonged, and the manufacture cost of ball screw is reduced.

Below in conjunction with specific embodiment and accompanying drawing the utility model is described in further detail.

Description of drawings

Fig. 1 is known end cover type ball screw exploded view;

Fig. 2 is known end cover type ball screw combination schematic representation;

Fig. 3 is that the A-A of Fig. 2 is to sectional view;

Fig. 4 is the utility model end cover type ball screw exploded view;

Fig. 5 is the utility model end cover type ball screw combination schematic representation;

Fig. 6 is that the A-A of Fig. 5 is to sectional view;

Fig. 7 is that the B-B of Fig. 6 is to sectional view;

Fig. 8 is that the C-C of Fig. 6 is to sectional view.

The primary component symbol description

Commonly use

1 screw rod, 11 sliding channels, 2 nuts

21 penetration holes, 211 rolling grooves, 22 return ports

23 flanges, 3 end caps, 30 through holes

31 recessed edge 32 Turning Roadways X axle direction

The utility model

1 screw rod, 11 sliding channels, 2 nuts

21 penetration holes, 211 rolling grooves, 22 return ports

23 projections, 231 half Turning Roadways, 24 fixed holes

3 end caps, 31 perforation, 32 grooves

321 half Turning Roadways, 33 guide portions, 34 through holes

4 roll pieces, 90 load paths, 80 Turning Roadways

G fixed block X axle direction.

Embodiment

See also Fig. 4 to shown in Figure 8, the utility model is a kind of end cover type ball screw, comprises: screw rod, nut, two end cap and roll piece; This screw rod 1 which is provided with spiral helicine sliding channel 11, and the cross section is circular; This nut 2, be provided with a penetration hole 21 that supplies this screw rod 1 to wear, these penetration hole 21 inner peripheral surface are provided with the rolling groove 211 of this sliding channel 11 relatively, this sliding channel 11 and rolling groove 211 constitute a load path 90, this load path 90 is installed with wherein for a plurality of roll pieces 4, this roll piece 4 is as the driving medium between this screw rod 1 and the nut 2, and this nut 2 more is provided with return port 22, and this return port 22 is for axle direction X setting and run through this nut 2 both ends of the surface; Two end cap 3, be arranged at the both ends of the surface of this nut 2 respectively, this end cap 3 is provided with a perforation 31 that supplies this screw rod 1 to wear, and be respectively equipped with groove 32 on the face of this end cap 3 and nut 2 relative engagement and this groove of projection 23(can be arranged at nut respectively or end cap all can, for example end cap 3 is provided with 32 nuts 2 one of groove and is decided to be projection 23, perhaps also but groove and projection are crisscross arranged in end cap or nut, but groove needs relative projection to be provided with and could to cooperate.And the size of this projection and groove is not a feature that the utility model is advocated, can cooperatively interact as this projection and groove and then to be design of the present utility model), this projection 23 is located in this groove 32 when this end cap 3 is assembled in this nut 2, and this groove 32 and projection 23 are respectively equipped with half Turning Roadways 231,321(is these half Turning Roadways 231 usually, 321 cross section is a semicircular arc, because this configuration is easier to make, but these two halves Turning Roadways 231, after 321 combinations, constitute path for roll piece 4 circulations, be all opinion scope of the present utility model), these two halves Turning Roadways 231,321 constitute Turning Roadways 80, these Turning Roadways 80 two ends connect this return port 22 and load path 90 respectively, supply these roll piece 4 Infinite Cyclic to form a complete circulating path.In addition, in order to allow roll piece 4 can pass in and out these Turning Roadways 80 smoothly, so be provided with a guide portion 33 in end cap 3, this guide portion 33 is connected with these Turning Roadways 80 and protrudes out setting towards this sliding channel 11, and guides this roll piece 4 into and out of these Turning Roadways 80.

Hold above-mentioned, these nut 3 half set Turning Roadways 321 are connected with rolling groove 211 and return port 22 respectively and are the kenel of one, not having offset between the event produces, and make two halves Turning Roadways 321,231 can constitute Turning Roadways accurately with cooperate (the seeing also Fig. 7 and Fig. 8) of projection 23 by groove 32, do not produce so also do not have offset between the two halves Turning Roadways 321,231, so the utility model improves the problem that can produce offset when the known techniques Turning Roadways are connected with load path and return port.In addition, by cooperating of groove 32 and projection 23, can limit the rotary freedom of end cap 3, so when the assembly crewman in when assembling, after only fixed block G need being arranged in the through hole 34 of end cap 3, the fixed hole 24 of fixed block G and nut 2 is screwed togather and this end cap 3 can be positioned nut 2, and do not need to go again to adjust the problem that Turning Roadways 80 are connected with load path 90 and return port 22.So the utility model can significantly promote the smooth degree of roll piece 4 operations, reduce the chance of roll piece 4 collisions relatively, the life-span of roll piece 4 can be prolonged, and the manufacture cost of ball screw is reduced.

The above embodiment is not to be to restriction of the present utility model in order to explanation the utility model, so the displacement of the variation of numerical value and equivalent elements such as still belongs in the category of the present utility model.

Claims

1. end cover type ball screw is characterized in that: includes,

One screw rod which is provided with spiral helicine sliding channel, and the cross section is circular;

One nut, be provided with a penetration hole that supplies this screw rod to wear, this penetration hole inner peripheral surface is provided with the rolling groove of this sliding channel relatively, this sliding channel and rolling groove constitute a load path, this load path is installed with wherein for a plurality of roll pieces, this nut more is provided with return port, and this return port is axle direction setting and the both ends of the surface that run through this nut;

Two end cap, be arranged at the both ends of the surface of this nut respectively, this end cap is provided with a perforation that supplies this screw rod to wear, and be respectively equipped with groove and projection on this end cap fitting surface relative with nut, this projection was located in this groove when this end cap was assembled in this nut, and this groove and projection be respectively equipped with half Turning Roadways, and these two halves Turning Roadways constitute Turning Roadways, these Turning Roadways two ends connect this return port and load path respectively, to form the circulating path of complete this roll piece Infinite Cyclic of confession.

2. end cover type ball screw as claimed in claim 1 is characterized in that: this end cap is provided with a guide portion, and this guide portion is connected this roll piece of guiding into and out of these Turning Roadways with these Turning Roadways.

3. end cover type ball screw as claimed in claim 1 is characterized in that: this groove is arranged at the end face of this end cap, and this projection then is arranged at the end face of this nut.

4. end cover type ball screw as claimed in claim 1 is characterized in that: this groove is arranged at the end face of this nut, and this projection then is arranged at the end face of this end cap.

5. end cover type ball screw as claimed in claim 1 is characterized in that: the cross section of these half Turning Roadways is a semicircular arc.