CN202914657U - High-speed and heavy-load ball screw assembly - Google Patents
High-speed and heavy-load ball screw assembly Download PDFInfo
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- CN202914657U CN202914657U CN201220484169.5U CN201220484169U CN202914657U CN 202914657 U CN202914657 U CN 202914657U CN 201220484169 U CN201220484169 U CN 201220484169U CN 202914657 U CN202914657 U CN 202914657U
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Abstract
The utility model discloses a high-speed and heavy-load ball screw assembly. The ball screw assembly comprises a screw shaft, a nut and at least two cycling devices. Ball spiral grooves are arranged between the outer surface of the screw shaft and the inner surface of the nut, a plurality of steel balls are arranged in the ball spiral grooves, and isolating rings are arranged between two adjacent steel balls. The ball screw assembly is characterized in that the at least two cycling devices are distributed successively along the axis of the screw shaft and inserted on two symmetrical sides of the nut respectively, and glands are sleeved on the outer sides of the cycling devices and fixedly connected with the nut. The ball screw assembly has the advantages that cycling curves of the steel balls in the cycling devices are optimized, and velocity jump points of the steel balls in the cycling devices in a moving process are eliminated, so that the steel ball movement is smooth, the revolution limit velocities of the steel balls around the screw axis is increased, the DN of the ball screw assembly is further improved, and the ball screw assembly is applicable to the high-speed and heavy-load field.
Description
Technical field
The utility model relates to a kind of ball screw pair, relates in particular to a kind of high speed heavy-load ball screw.
Background technique
For to make the production of plastic product reach highi degree of accuracy, high efficiency, injection machine is an inexorable trend to motorized development under world today's situation, and full electric injection molding machine is than in the past more environmental protection of hydraulic type injection moulding machine, energy-conservation.Therefore along with the development of this motorized, its component must also can keep high reliability under bad working environments, and the Performance And Reliability as the ball screw pair of full electric injection molding machine Mechanical Driven part key components and parts just seems particularly important.
At present, domestic traditional ball screw pair all is to be applied in high speed light loading or low-speed heave-load field, and in order to satisfy large load, the fast moving requirement of injection machine injection moulding and matched moulds part, its to DN value of ball screw pair require generally 14～more than 160,000, and the DN value depends on the whether submissive of ball-recirculation curve to a great extent.Therefore, the ball screw pair of design research and development high-speed overload is imperative.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of DN of increase value, makes it applicable to the high speed heavy-load ball screw in high-speed overload field.
The utility model solves the problems of the technologies described above the technological scheme that adopts: a kind of high speed heavy-load ball screw, comprise lead screw shaft, nut and at least two circulation meanss, be provided with the ball screw groove between the outer surface of described lead screw shaft and the internal surface of described nut, be furnished with a plurality of steel balls in the described ball screw groove, be furnished with cage ring between two adjacent steel balls, described circulation means distributes successively and is plugged on respectively both sides symmetrical on the described nut along the axis of described lead screw shaft, described circulation means overcoat has gland, and described gland is fixedly connected with described nut.
Described circulation means comprises loop-body, the two ends of described loop-body are fixedly installed respectively the pin of the central point that follows the ring main body, described pin comprises the tongue oral area and the section that blocks, the length of the described section that blocks is greater than the length of described tongue oral area, the described section of blocking is positioned at the outside of described tongue oral area, described tongue oral area is provided with semicircular tongue mouth goal chamber, inlet's radius in described tongue mouth goal chamber is less than the radius of steel ball in the ball screw pair, the described section of blocking is provided with the semicircular goal chamber of blocking, the radius in the described goal chamber of blocking is greater than the radius of steel ball in the ball screw pair, and described tongue mouth goal chamber and the described goal chamber of blocking form a steel ball goal chamber jointly.
Inlet's radius in described tongue mouth goal chamber is 0.9～0.95 times of steel ball radius in the described ball screw pair, in same cross section, the throw of eccentric of the inlet center in described tongue mouth goal chamber and the centre of sphere of steel ball is 0.9～1.2mm, and the radius in the described goal chamber of blocking is 1.05～1.15 times of steel ball radius in the described ball screw pair.
Be provided with the steel ball passage in the described loop-body, the steel ball goal chamber at described steel ball passage and two ends forms the circulation canal of steel ball jointly, the cross section of described circulation canal equates with described radius of blocking the goal chamber for round and cross section radius, the center line of described circulation canal is the movement locus of the steel ball centre of sphere, be the cyclic curve of steel ball, described cyclic curve is along the central point of described loop-body, described cyclic curve from steel ball goal chamber to central point successively by the helix extension, the BridgeCurve section, fillet section and straightway form, and described helix extension is by relation
Determine,
Wherein: the coordinate of putting on (x, y, z) expression cyclic curve, L represents the helical pitch of ball screw pair, d
0The nominal diameter of screw mandrel in the expression ball screw pair;
Described BridgeCurve section is by the projection relation formula in the XOZ face
With the projection relation formula in the XOY face
Common definite, wherein:
The projection center of circle of expression BridgeCurve section in the XOZ face, R
1The radius of the projection of expression BridgeCurve section in the XOZ face;
Described fillet section is by the projection relation formula in the X ' OZ face
With the projection relation formula in the XOY face
,
Common determine that wherein: X ' OZ face is obtained after Z axis rotation alpha ° by the XOZ face, and α represents the angle that the XOZ face rotates around Z axis,
The projection center of circle of expression fillet section in X ' OZ face,
Be illustrated in the point in the projection in the X ' OZ face, R
2The radius of the projection of expression fillet section in X ' OZ face,
Be illustrated in the starting point of the fillet section projection in the XOY face, the circulation number of turns after n represents to round up;
Described straightway is by the projection relation formula z=constant A in the XOZ face and the projection relation formula in the XOY face
Common definite, wherein constant A is installed the external diameter decision by the maximum of the nut on the ball screw pair.
The material of described loop-body and described pin is synthetic resin.
The outer surface of the outer surface of the joint of described loop-body and described pin, described tongue oral area, the described section that blocks is respectively arranged with depression, can prevent that this circulation means from producing distortion in injection moulding process, so that its wall thickness is even.
Compared with prior art, the utility model has the advantages that because circulation means distributes successively and is plugged on respectively both sides symmetrical on the nut along the axis of lead screw shaft, the thrust load of nut inside is evenly distributed on circumference, improve the bearing capacity of whole ball screw pair, also prolonged working life simultaneously; Again since in the circulation means since inlet's radius in tongue mouth goal chamber less than the radius of steel ball in the ball screw pair, block the radius in goal chamber greater than the radius of steel ball in the ball screw pair, be conducive to scooping up and turning to of steel ball in the cyclic process, guaranteed stablely when steel ball is scooped up at tongue mouth place to follow the ring curvilinear motion, reduced the double swerve in the steel ball circulation steering procedure, improve the revolution speed of steel ball wire winding rod axis, thereby improved the DN value of ball screw pair integral body; And cyclic curve is comprised of helix extension, BridgeCurve section, fillet section and straightway successively, steel ball is optimized at the cyclic curve of this circulation means inside, eliminated steel ball point of the velocity jump in the movement process in circulation means, make the steel ball motion more smooth, improved the velocity limit of steel ball wrapping wire thick stick axis revolution, further increased the DN value of ball screw pair, so that ball screw pair is applicable to the high-speed overload field.
Description of drawings
Fig. 1 is front view of the present utility model;
Fig. 2 is partial sectional view of the present utility model;
Fig. 3 is steel ball of the present utility model and the schematic representation that cooperates of circulation means;
Fig. 4 is the front view of circulation means of the present utility model;
Fig. 5 is the cross sectional representation of loop-body of the present utility model;
Fig. 6 is the perspective view of circulation means of the present utility model;
Fig. 7 is the schematic representation in steel ball goal chamber in the circulation means of the present utility model;
Fig. 8 be steel ball goal of the present utility model chamber with steel ball cooperate the signal enlarged view;
Fig. 9 is the perspective view of cyclic curve of the present utility model in the XOZ face;
Figure 10 is the perspective view of cyclic curve of the present utility model in the XOY face.
Embodiment
Embodiment is described in further detail the utility model below in conjunction with accompanying drawing.
As shown in the figure, a kind of high speed heavy-load ball screw, comprise lead screw shaft 4, nut 5 and four circulation meanss, be provided with ball screw groove 41 between the internal surface of the outer surface of lead screw shaft 4 and nut 5, be furnished with a plurality of steel balls 6 in the ball screw groove 41, be furnished with cage ring 7 between two adjacent steel balls 6, circulation means distributes successively and is plugged on respectively both sides symmetrical on the nut 5 along the axis of lead screw shaft 4, the circulation means overcoat has gland 8, gland 8 is fixedly connected on the nut 5 by screw, circulation means comprises loop-body 1, the two ends of loop-body 1 are wholely set respectively the pin 2 of the central point that follows ring main body 1, pin 2 comprises tongue oral area 21 and the section 22 that blocks, block the length of section 22 greater than the length of tongue oral area 21, the section 22 that blocks is positioned at the outside of tongue oral area 21, the joint of loop-body 1 and pin 2, the outer surface of tongue oral area 21, the outer surface of section 22 of blocking is respectively arranged with depression 3, tongue oral area 21 is provided with semicircular tongue mouth goal chamber 211, inlet's radius R in tongue mouth goal chamber 211
TongueBe steel ball radius R in the ball screw pair
Ball0.92 times, and in same cross section, the inlet center in tongue mouth goal chamber 211 and the eccentric distance e of the steel ball centre of sphere are 1.1mm, the section 22 that blocks is provided with the semicircular goal chamber 221 of blocking, the radius R in the goal chamber 221 of blocking
GearBe steel ball radius R in the ball screw pair
Ball1.1 times, tongue mouth goal chamber 211 and the steel ball goal chamber of 221 common compositions, goal chamber of blocking, be provided with steel ball passage 11 in the loop-body 1, the steel ball goal chamber at steel ball passage 11 and two ends forms the circulation canal of steel ball 6 jointly, and the cross section of circulation canal is the radius R in circle and cross section radius and the goal chamber 221 of blocking
GearEquate, the center line of circulation canal is the movement locus of the steel ball centre of sphere, be the cyclic curve of steel ball 6, cyclic curve follows the central point of ring main body 1, cyclic curve is comprised of helix extension S1, BridgeCurve section S2, fillet section S3 and straightway S4 successively from steel ball goal chamber to central point, and helix extension S1 is by relation
Determine,
Wherein: the coordinate of putting on (x, y, z) expression cyclic curve, L represents the helical pitch of ball screw pair, d
0The nominal diameter of screw mandrel in the expression ball screw pair;
BridgeCurve section S2 is by the projection relation formula in the XOZ face
With the projection relation formula in the XOY face
Common definite, wherein:
The projection center of circle of expression BridgeCurve section in the XOZ face, R
1The radius of the projection of expression BridgeCurve section in the XOZ face;
Fillet section S3 is by the projection relation formula in the X ' OZ face
With the projection relation formula in the XOY face
,
Common determine that wherein: X ' OZ face is obtained after Z axis rotation alpha ° by the XOZ face, and α represents the angle that the XOZ face rotates around Z axis,
The projection center of circle of expression fillet section in X ' OZ face,
Be illustrated in the point in the projection in the X ' OZ face, R
2The radius of the projection of expression fillet section in X ' OZ face,
Be illustrated in the starting point of the fillet section projection in the XOY face, the circulation number of turns after n represents to round up (number of turns that for example circulates is 3.5 circles, and then n gets 4);
Straightway S4 is by the projection relation formula z=constant A in the XOZ face and the projection relation formula in the XOY face
Common definite, wherein constant A is installed the external diameter decision by the maximum of the nut on the ball screw pair.
In above-described embodiment, the quantity of circulation means can require according to the actual load of ball wire bar pair to select, but is at least two, and the material of loop-body 1 and pin 2 is synthetic resin, the radius R in tongue mouth goal chamber 211
TongueSteel ball radius R in ball screw pair according to actual needs
Ball0.9～0.95 times scope in select, in same cross section, the center in tongue mouth goal chamber 211 and the eccentric distance e of the steel ball centre of sphere can be selected the radius R in the goal chamber 221 of blocking in the scope of 0.9～1.2mm
GearSteel ball radius R in ball screw pair according to actual needs
Ball1.05～1.15 times scope in select.
Claims (6)
1. high speed heavy-load ball screw, comprise lead screw shaft, nut and at least two circulation meanss, be provided with the ball screw groove between the outer surface of described lead screw shaft and the internal surface of described nut, be furnished with a plurality of steel balls in the described ball screw groove, be furnished with cage ring between two adjacent steel balls, it is characterized in that described circulation means distributes successively and is plugged on respectively both sides symmetrical on the described nut along the axis of described lead screw shaft, described circulation means overcoat has gland, and described gland is fixedly connected with described nut.
2. a kind of high speed heavy-load ball screw as claimed in claim 1, it is characterized in that described circulation means comprises loop-body, the two ends of described loop-body are fixedly installed respectively the pin of the central point that follows the ring main body, described pin comprises the tongue oral area and the section that blocks, the length of the described section that blocks is greater than the length of described tongue oral area, the described section of blocking is positioned at the outside of described tongue oral area, described tongue oral area is provided with semicircular tongue mouth goal chamber, inlet's radius in described tongue mouth goal chamber is less than the radius of steel ball in the ball screw pair, the described section of blocking is provided with the semicircular goal chamber of blocking, the radius in the described goal chamber of blocking is greater than the radius of steel ball in the ball screw pair, and described tongue mouth goal chamber and the described goal chamber of blocking form a steel ball goal chamber jointly.
3. a kind of high speed heavy-load ball screw as claimed in claim 2, the inlet's radius that it is characterized in that described tongue mouth goal chamber is 0.9～0.95 times of steel ball radius in the described ball screw pair, in same cross section, the throw of eccentric of the inlet center in described tongue mouth goal chamber and the centre of sphere of steel ball is 0.9～1.2mm, and the radius in the described goal chamber of blocking is 1.05～1.15 times of steel ball radius in the described ball screw pair.
4. a kind of high speed heavy-load ball screw as claimed in claim 2, it is characterized in that being provided with in the described loop-body steel ball passage, the steel ball goal chamber at described steel ball passage and two ends forms the circulation canal of steel ball jointly, the cross section of described circulation canal equates with described radius of blocking the goal chamber for round and cross section radius, the center line of described circulation canal is the movement locus of the steel ball centre of sphere, be the cyclic curve of steel ball, described cyclic curve is along the central point of described loop-body, described cyclic curve from steel ball goal chamber to central point successively by the helix extension, the BridgeCurve section, fillet section and straightway form, and described helix extension is by relation
Determine,
Wherein: the coordinate of putting on (x, y, z) expression cyclic curve, L represents the helical pitch of ball screw pair, d
0The nominal diameter of screw mandrel in the expression ball screw pair;
Described BridgeCurve section is by the projection relation formula in the XOZ face
With the projection relation formula in the XOY face
Common definite, wherein:
The projection center of circle of expression BridgeCurve section in the XOZ face, R
1The radius of the projection of expression BridgeCurve section in the XOZ face;
Described fillet section is by the projection relation formula in the X ' OZ face
With the projection relation formula in the XOY face
,
Common determine that wherein: X ' OZ face is obtained after Z axis rotation alpha ° by the XOZ face, and α represents the angle that the XOZ face rotates around Z axis,
The projection center of circle of expression fillet section in X ' OZ face,
Be illustrated in the point in the projection in the X ' OZ face, R
2The radius of the projection of expression fillet section in X ' OZ face,
Be illustrated in the starting point of the fillet section projection in the XOY face, the circulation number of turns after n represents to round up;
Described straightway is by the projection relation formula z=constant A in the XOZ face and the projection relation formula in the XOY face
Common definite, wherein constant A is installed the external diameter decision by the maximum of the nut on the ball screw pair.
5. a kind of high speed heavy-load ball screw as claimed in claim 2 is characterized in that the material of described loop-body and described pin is synthetic resin.
6. a kind of high speed heavy-load ball screw as claimed in claim 2 is characterized in that the outer surface of the joint of described loop-body and described pin, described tongue oral area, the outer surface of the described section that blocks are respectively arranged with depression.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220484169.5U CN202914657U (en) | 2012-09-21 | 2012-09-21 | High-speed and heavy-load ball screw assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220484169.5U CN202914657U (en) | 2012-09-21 | 2012-09-21 | High-speed and heavy-load ball screw assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202914657U true CN202914657U (en) | 2013-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220484169.5U Expired - Lifetime CN202914657U (en) | 2012-09-21 | 2012-09-21 | High-speed and heavy-load ball screw assembly |
Country Status (1)
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|---|---|
| CN (1) | CN202914657U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102889350A (en) * | 2012-09-21 | 2013-01-23 | 宁波海迈克精密机械制造有限公司 | High-speed heavy-load ball screw assembly |
| CN110375048A (en) * | 2019-08-06 | 2019-10-25 | 深圳市威远精密技术有限公司 | A kind of embedded interior circulation ball nut |
-
2012
- 2012-09-21 CN CN201220484169.5U patent/CN202914657U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102889350A (en) * | 2012-09-21 | 2013-01-23 | 宁波海迈克精密机械制造有限公司 | High-speed heavy-load ball screw assembly |
| CN102889350B (en) * | 2012-09-21 | 2015-07-08 | 宁波海迈克精密机械制造有限公司 | High-speed heavy-load ball screw assembly |
| CN110375048A (en) * | 2019-08-06 | 2019-10-25 | 深圳市威远精密技术有限公司 | A kind of embedded interior circulation ball nut |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130501 |
|
| CX01 | Expiry of patent term |