CN211737914U - Nut rotation type ball screw - Google Patents
Nut rotation type ball screw Download PDFInfo
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- CN211737914U CN211737914U CN202020042302.6U CN202020042302U CN211737914U CN 211737914 U CN211737914 U CN 211737914U CN 202020042302 U CN202020042302 U CN 202020042302U CN 211737914 U CN211737914 U CN 211737914U
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- connecting block
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- groove
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Abstract
The utility model discloses a nut rotating type ball screw, which comprises a screw rod, a ball nut is sleeved on the outer wall of the screw rod, an outer spiral groove is formed on the outer wall of the screw rod, an inner thread groove matched with the outer spiral groove is formed on the inner wall of the ball nut, a plurality of first balls are arranged in the inner thread groove, a bearing outer sleeve rotationally connected with the nut is sleeved on the outer sleeve of the ball nut, a pair of outer ring grooves are formed on the outer wall of the ball nut, a plurality of second balls are respectively arranged in the outer ring grooves, the bearing outer sleeve comprises a first connecting block, and the inner wall of the second connecting block is provided with a second holding part which is used for matching with the other outer ring groove and holding the second ball therein.
Description
Technical Field
The utility model belongs to the technical field of rotating device and specifically relates to a nut rotation type ball screw is related to.
Background
The ball screw is a commonly used linear moving device, which can convert the rotation motion into the linear motion, the existing ball screw mostly comprises a screw rod and a nut sleeved on the screw rod, a plurality of balls capable of reciprocating along a circulation path are arranged between the screw rod and the nut, and when the screw rod is driven to rotate by a motor, the screw rod and the nut rotate relatively and drive the nut to perform the linear motion.
For example, CN 209604502U discloses a new ball screw, which changes the bearing from sliding to rolling motion by mounting a rotating outer sleeve rotatably connected to a nut on a nut. The rotating outer sleeve in the patent is integrally formed, so that the installation is complex and the installation cost is high.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an it is not enough to overcome above-mentioned condition, aims at providing the technical scheme that can solve above-mentioned problem.
A nut rotation type ball screw comprises a screw, a ball nut is sleeved on the outer wall of the screw, an outer spiral groove is formed on the outer wall of the screw, an inner spiral groove matched with the outer spiral groove is formed on the inner wall of the ball nut, a plurality of first balls are arranged in the inner spiral groove, a bearing sleeve rotatably connected with the nut is sleeved on the outer sleeve of the ball nut, a pair of outer circular grooves are formed on the outer wall of the ball nut, a plurality of second balls are respectively arranged in the outer circular grooves, the bearing sleeve comprises a first connecting block, and the inner wall of the second connecting block is provided with a second holding part which is used for matching with the other outer ring groove and holding the second ball therein.
As a further aspect of the present invention: the right-hand member shaping of ball nut has first mounting groove, and the joint has first end cover in the first mounting groove, and the shape of first end cover is the annular, and first end cover cooperation internal thread groove keeps fixed first ball.
As a further aspect of the present invention: the left end shaping of ball nut has the second mounting groove, and the joint has the second end cover in the second mounting groove, and the shape of second end cover is the annular, and the first ball of second end cover cooperation internal thread groove holding is fixed.
As a further aspect of the present invention: and a third connecting block is arranged between the first connecting block and the second connecting block, the third connecting block is annular, and the third connecting block is clamped and fixed by the first connecting block and the second connecting block.
As a further aspect of the present invention: and third mounting grooves are formed in the left side and the right side of the bearing outer sleeve, oil seals are clamped in the third mounting grooves, and the oil seals are annular.
As a further aspect of the present invention: be equipped with annular retainer in the bearing housing, there is first arc wall along the shaping including retainer left side, there is the second arc wall along the shaping including retainer right side, first retaining portion and second retaining portion are annular step, there is the third arc wall along the shaping in the first retaining portion, there is the fourth arc wall along the shaping in the second retaining portion, first arc wall and third arc wall cooperation keep the second ball, the second arc wall keeps the second ball with the fourth arc wall cooperation.
Compared with the prior art, the beneficial effects of the utility model are that: through dividing into first connecting block, second connecting block and third connecting block triplex with the bearing overcoat, be favorable to ball screw's installation.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic diagram of a third connecting block structure according to the present invention.
Fig. 3 is a schematic structural view of the first end cap of the present invention.
In the figure: 1. the screw rod, 2, ball nut, 3, external spiral groove, 4, internal thread groove, 5, first ball, 6, bearing housing, 7, outer annular groove, 8, second ball, 9, second connecting block, 10, first holding portion, 11, second holding portion, 12, first mounting groove, 13, first end cover, 14, second mounting groove, 15, second end cover, 16, third connecting block, 17, third mounting groove, 18, oil seal, 19, retainer, 20, first arc-shaped groove, 21, second arc-shaped groove, 22, third arc-shaped groove, 23, fourth arc-shaped groove, 24, first connecting block.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 to 3, in an embodiment of the present invention, a nut-rotating ball screw includes a screw 1, a ball nut 2 is sleeved on an outer wall of the screw 1, an outer spiral groove 3 is formed on an outer wall of the screw 1, an inner spiral groove 4 matched with the outer spiral groove 3 is formed on an inner wall of the ball nut 2, a plurality of first balls 5 are disposed in the inner spiral groove 4, a bearing housing 6 rotatably connected to the nut is provided on an outer wall of the ball nut 2, a pair of outer annular grooves 7 are formed on an outer wall of the ball nut 2, a plurality of second balls 8 are disposed in the outer annular grooves 7, the bearing housing 6 includes a first connecting block 24 and a second connecting block 9, the first connecting block 24 and the second connecting block 9 are annular in shape, the first connecting block 24 is flange-connected to the second connecting block 9, a first retaining portion 10 for cooperating with one of the outer annular grooves 7 and retaining the second balls 8 therein is disposed on an inner wall of the first connecting block 24, the inner wall of the second connecting block 9 has a second holding portion 11 for engaging the other outer ring groove 7 and holding the second balls 8 therein.
The right end of the ball nut 2 is formed with a first mounting groove 12, a first end cap 13 is clamped in the first mounting groove 12, the first end cap 13 is annular, and the first end cap 13 is matched with the internal thread groove 4 to keep fixing the first ball 5.
The left end of the ball nut 2 is formed with a second mounting groove 14, a second end cap 15 is clamped in the second mounting groove 14, the second end cap 15 is annular, and the second end cap 15 is matched with the internal thread groove 4 to keep fixing the first ball 5.
A third connecting block 16 is arranged between the first connecting block 24 and the second connecting block 9, the third connecting block 16 is annular, and the third connecting block 16 is clamped and fixed by the first connecting block 24 and the second connecting block 9.
Be equipped with annular holder 19 in the bearing housing 6, there is first arc wall 20 along the shaping including holder 19 left side, there is second arc wall 21 along the shaping including holder 19 right side, first retaining portion 10 is annular step with second retaining portion 11, there is third arc wall 22 along the shaping in first retaining portion 10, there is fourth arc wall 23 along the shaping in second retaining portion 11, second ball 8 is kept in first arc wall 20 and the cooperation of third arc wall 22, second arc wall 21 keeps second ball 8 with the cooperation of fourth arc wall 23.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (6)
1. A nut rotating type ball screw comprises a screw, a ball nut is sleeved on the outer wall of the screw, an outer spiral groove is formed on the outer wall of the screw, an inner spiral groove matched with the outer spiral groove is formed on the inner wall of the ball nut, a plurality of first balls are arranged in the inner spiral groove, a bearing sleeve rotatably connected with the nut is sleeved on the outer sleeve of the ball nut, a pair of outer circular grooves are formed on the outer wall of the ball nut, a plurality of second balls are respectively arranged in the outer circular grooves, the bearing outer sleeve is characterized by comprising a first connecting block and a second connecting block, wherein the first connecting block and the second connecting block are annular in shape, the first connecting block is in flange connection with the second connecting block, the inner wall of the first connecting block is provided with a first retaining part which is used for being matched with one of the outer ring grooves and retaining the second balls in the outer ring grooves, and the inner wall of the second connecting block is provided with a second retaining part which is used for being matched with the other outer ring groove and retaining the second balls in the outer ring grooves.
2. The nut-rotating ball screw according to claim 1, wherein the ball nut has a first mounting groove formed at a right end thereof, and a first end cap is engaged with the first mounting groove and has a ring shape, and the first end cap is engaged with the female screw groove to hold the first ball.
3. The nut-rotating ball screw according to claim 1, wherein the ball nut has a second mounting groove formed at a left end thereof, and a second end cap is engaged with the second mounting groove, and has a ring shape, and the second end cap is engaged with the female screw groove to hold the first ball.
4. The nut-rotating ball screw according to claim 1, wherein a third connecting block is provided between the first connecting block and the second connecting block, the third connecting block having a ring shape, and the third connecting block is held by the first connecting block and the second connecting block.
5. The nut-rotating ball screw according to claim 1, wherein third mounting grooves are formed on left and right sides of the bearing housing, and oil seals are engaged in the third mounting grooves, and the oil seals are annular.
6. The nut-rotating ball screw according to claim 1, wherein the bearing housing has an annular retainer, the left side of the retainer has a first arc-shaped groove formed on an inner edge thereof, the right side of the retainer has a second arc-shaped groove formed on an inner edge thereof, the first retaining portion and the second retaining portion are annular steps, the inner edge of the first retaining portion has a third arc-shaped groove formed thereon, the inner edge of the second retaining portion has a fourth arc-shaped groove formed thereon, the first arc-shaped groove and the third arc-shaped groove cooperate to retain the second ball, and the second arc-shaped groove and the fourth arc-shaped groove cooperate to retain the second ball.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020042302.6U CN211737914U (en) | 2020-01-09 | 2020-01-09 | Nut rotation type ball screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020042302.6U CN211737914U (en) | 2020-01-09 | 2020-01-09 | Nut rotation type ball screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211737914U true CN211737914U (en) | 2020-10-23 |
Family
ID=72881156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020042302.6U Active CN211737914U (en) | 2020-01-09 | 2020-01-09 | Nut rotation type ball screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211737914U (en) |
-
2020
- 2020-01-09 CN CN202020042302.6U patent/CN211737914U/en active Active
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