Novel transmission ball screw

Abstract

The utility model provides a novel transmission ball screw which comprises a rod body, a ball positioning sleeve is movably installed on the outer wall of the circumference of the rod body, a plurality of positioning holes penetrating through the inside and the outside are formed in the circumferential face of the ball positioning sleeve at equal intervals in a surrounding mode, and the position interval of every two adjacent positioning holes is consistent with the guide distance of the rod body. The diameter of an inner hole opening of the positioning hole is smaller than that of an outer hole opening, an outer raceway sleeve is fixedly installed on the outer wall of the circumference of the ball positioning sleeve, a plurality of balls are installed between the positioning hole in the inner wall of the circumference of the ball positioning sleeve and the rod body at equal intervals in a surrounding and rolling mode, and the diameter of the balls is larger than that of the inner hole opening of the positioning hole. The novel transmission ball screw can play a role in preventing the balls from falling off.

Description

TECHNICAL FIELD

[0001] The utility model relates to a ball screw technical field more specifically, relate to a novel transmission ball screw. BACKGROUND

[0002] With the continuous improvement of industrial automation level, as the core component of the precision transmission field, the application range of ball screw has been expanded to intelligent manufacturing, precision instruments, aerospace and other high-end fields. Ball screw converts rotary motion into linear motion through unique rolling friction transmission mechanism, and realizes accurate conversion of torque and axial force. The existing ball screw mainly adopts two guide modes of outer circulation and inner circulation: in the outer circulation structure, the transition phase of the ball separated from the screw thread exists in the circulation channel, and the inner circulation realizes the continuous contact motion of the ball through the reverser; each complete ball circulation loop constitutes a transmission column, and the number of leads contained determines the number of turns of the transmission system.

[0003] The ball screw used on the existing automatic equipment has become mature, but there are still some deficiencies. During the transmission process of the ball screw, the balls are prone to fall off, which directly leads to the failure of the ball screw to use, and also cannot be repaired by itself, and needs to be returned to the factory for maintenance, with a maintenance cycle of 5-7 working days, which seriously affects the production continuity.

[0004] The utility model can prevent the balls from falling off. UTILITY MODEL CONTENT

[0005] The utility model aims at solving the technical problems in the above background art, and provides a novel transmission ball screw.

[0006] To achieve the above object, the utility model provides the following technical scheme: a novel transmission ball screw, comprising: a rod body, a ball positioning sleeve is movably installed on the circumferential outer wall of the rod body, a plurality of positioning holes are equidistantly and circumferentially provided on the circumferential surface of the ball positioning sleeve, the position interval of adjacent two positioning holes is consistent with the lead distance of the rod body, the diameter of the inner hole of the positioning hole is smaller than the diameter of the outer hole, an outer raceway sleeve is fixedly installed on the circumferential outer wall of the ball positioning sleeve, a plurality of balls are equidistantly and circumferentially installed between the positioning hole on the circumferential inner wall of the ball positioning sleeve and the rod body, and the diameter of the ball is greater than the diameter of the inner hole of the positioning hole.

[0007] Further preferred scheme: the circumferential outer wall of the rod body is integrally formed with a threaded groove.

[0008] Further preferred scheme: the ball positioning sleeve comprises: an inner tube and a connecting ring, and the inner tube is movably installed on the circumferential outer wall of the rod body.

[0009] Further preferred scheme: the connecting ring is fixedly installed at the rear end of the inner tube.

[0010] Further preferred: the connecting ring is provided with four connecting grooves equidistantly around the periphery, and the inner tube is provided with a plurality of through holes equidistantly around the circumferential surface.

[0011] Further preferred: the outer raceway sleeve comprises an outer tube and connecting blocks, and the outer tube is fixedly installed on the circumferential outer wall of the inner tube.

[0012] Further preferred: four connecting blocks are fixedly installed equidistantly on the rear side of the outer tube, and the connecting blocks are matched with the connecting grooves.

[0013] Further preferred: the front side of the outer raceway sleeve is fixedly installed with the front side of the ball positioning sleeve through a fixed nut.

[0014] Further preferred: a plurality of balls are equidistantly installed between the through holes on the circumferential inner wall of the inner tube and the rod body, and the number of balls is consistent with the number of through holes.

[0015] Further preferred: the balls are distributed between the thread grooves of the rod body and the inner wall of the inner tube.

[0016] Beneficial effects:

[0017] 1. By setting the positioning holes to limit the radial movement of the balls, the problem of easy falling off of the balls in the prior art is solved.

[0018] 2. By setting the diameter of the balls to be larger than the inner diameter of the positioning holes, axial limiting is achieved by the stepped hole structure of the ball positioning sleeve to prevent falling off.

[0019] 3. By setting the stepped hole (small inner hole, large outer hole) of the ball positioning sleeve and the diameter difference of the balls to form a "latch" effect, even in high-speed motion or vibration working conditions, the balls cannot escape from the track from the inside.

[0020] 4. The balls of the novel transmission ball screw are inside the positioning holes, and because the inner diameter of the positioning holes is smaller than the outer diameter, the balls will not fall out during rolling. In addition, if a ball is broken or damaged during operation, it will not affect normal operation. However, in the traditional way, if a ball is missing or damaged, the ball will fall out and the entire operation will stop.

[0021] 5. In summary, the novel transmission ball screw solves the problems of easy falling off of the balls and complex maintenance of the traditional ball screw by setting the ball positioning sleeve and the positioning holes, and is suitable for high-precision and high-reliability automation equipment scenes (such as numerical control machine tools, semiconductor equipment, etc.). BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the whole structure schematic view of the utility model.

[0023] Figure 2 It is the exploded structure schematic view of the utility model's screw rod axle and outer raceway sleeve.

[0024] Figure 3 It is the exploded structure schematic view of the utility model's screw rod axle, ball positioning sleeve, outer raceway sleeve and fixed nut.

[0025] Figure 4 It is the three-dimensional structure schematic view of the front view angle of the utility model's ball positioning sleeve.

[0026] Figure 5 It is the three-dimensional structure schematic view of the back view angle of the utility model's ball positioning sleeve.

[0027] Figure 6 It is the plane structure schematic view of the side view angle of the utility model.

[0028] Figure 7 It is the plane structure schematic view of the back view angle of the utility model.

[0029] Figures 1-7 Middle: 1, rod body;101, thread groove;2, ball positioning sleeve;201, inner tube;202, connecting ring;203, connecting groove;204, positioning hole;3, outer raceway sleeve;301, outer tube;302, connecting block;4, fixed nut;5, ball. Specific implementation

[0030] The utility model will be described clearly and completely below in conjunction with the drawings of the utility model embodiments. Figures 1-7 The technical scheme in the utility model embodiments is described clearly and completely.

[0031] Please refer to Figures 1-7The utility model discloses an embodiment of a novel transmission ball screw, which comprises a rod body 1 as a main structure of the ball screw, a threaded groove 101 and a ball 5 are matched to convert rotary motion into linear motion (or reverse), and torque and axial force are transmitted.

[0032] In the embodiment of the utility model, the threaded groove 101 is integrally formed on the circumferential outer wall of the rod body 1, and the threaded groove 101 provides a rolling track for the ball 5. When the rod body 1 rotates, the ball 5 rolls in the space formed by the threaded groove 101 and the positioning hole 204, converts the rotary motion of the rod body 1 into linear motion, and simultaneously bears axial load and radial load, thereby ensuring transmission accuracy.

[0033] In the embodiment of the utility model, the ball positioning sleeve 2 comprises an inner tube 201 and a connecting ring 202. The inner tube 201 is movably installed on the circumferential outer wall of the rod body 1, and the inner tube 201 can rotate flexibly on the rod body 1, thereby ensuring smooth rolling of the ball 5 in the positioning hole 204 and providing certain support and guiding effect for the ball.

[0034] In the embodiment of the utility model, the connecting ring 202 is fixedly installed at the rear end of the inner tube 201, and the connecting ring 202 serves to connect and fix the inner tube 201 and provides a structural basis for connection with the outer raceway sleeve 3.

[0035] The utility model embodiment, the connecting circle 202 periphery equidistance surrounds and is provided with 4 connecting grooves 203, and the connecting groove 203 and the connecting block 302 of outer race cover 3 are mutually matched, realize the stable connection of ball positioning cover 2 and outer race cover 3, guarantee the stability of overall structure in transmission process, and the inner tube 201 circumferential surface equidistance surrounds and is provided with several inside and outside through positioning hole 204.

[0036] The utility model embodiment, outer race cover 3 includes: outer tube 301 and connecting block 302, and the outer tube 301 is fixedly installed on the circumferential outer wall of inner tube 201, and the outer tube 301 further protects ball 5, and simultaneously provides the rolling of ball 5 with outside constraint, and forms the movement space of ball 5 with inner tube 201.

[0037] The utility model embodiment, the outer tube 301 rear side equidistance surrounds and is fixedly installed with 4 connecting blocks 302, and the connecting block 302 and connecting groove 203 mutually fit and match, when installing, the connecting block 302 is inserted into connecting groove 203 in alignment, and the connection of outer race cover 3 and ball positioning cover 2 can be primarily completed, and the operation is simple and firm.

[0038] The utility model embodiment, the ball positioning cover 2 circumferential outer wall front side fixes ball positioning cover 2 with outer race cover 3 front side through fixed nut 4, and fixed nut 4 further strengthens the connection stability of both, prevents the connection slackening due to vibration and other factors in transmission process, and ensures the normal operation of ball screw.

[0039] The utility model embodiment, the positioning hole 204 on the inner wall of inner tube 201 and the rod body 1 between equidistance surround and are installed with several balls 5, and the number of ball 5 is consistent with the number of positioning hole 204, and the uniformly distributed ball 5 can more balancedly transmit force, improve the stability and precision of transmission, simultaneously reduce the stress of single ball 5, prolong the service life of ball screw.

[0040] The utility model embodiment, ball 5 is distributed between the thread groove 101 of rod body 1 and the inner wall of inner tube 201, and ball 5 is constrained in the annular gap formed by inner tube 201 and the thread groove 101 of rod body 1, and cannot fall to the radial inner side.

[0041] Working principle: in practical application, the inner tube 201 of the ball positioning sleeve 2 is sleeved on the threaded groove 101 section of the rod body 1, and the inner tube 201 can rotate freely along the axis of the rod body 1, when the rod body 1 rotates, the ball 5 rolls along the spiral track under the guidance of the inner wall of the threaded groove 101 and the inner tube 201, due to the limiting effect of the positioning hole 204 on the ball 5, even in the case of high-speed operation or impact, the ball 5 will not fall off, compared with the traditional ball screw, when a fault occurs, the on-site staff can separate the ball positioning sleeve 2 from the outer raceway sleeve 3 by disassembling the fixing nut 4, and replace the individual ball 5 that is worn or may have a problem, greatly shortening the maintenance cycle and improving the production efficiency; the ball of the novel transmission ball screw is in the positioning hole, because the inner diameter of the positioning hole is smaller than the outer diameter, so the ball will not come off during rolling; in addition, if the ball is broken or damaged during work, it will not affect normal operation; but in the traditional way, if a ball is missing and damaged, the ball will come off, and the whole work will stop.

Claims

1. A novel transmission ball screw, comprising: The rod body (1) is characterized in that: a ball positioning sleeve (2) is movably installed on the outer circumference of the rod body (1), and a plurality of positioning holes (204) are equidistantly arranged around the circumference of the ball positioning sleeve (2), the positional interval between two adjacent positioning holes (204) is consistent with the guide distance of the rod body (1), the diameter of the inner opening of the positioning hole (204) is smaller than the diameter of the outer opening, an outer raceway sleeve (3) is fixedly installed on the outer circumference of the ball positioning sleeve (2), and a plurality of balls (5) are equidistantly arranged around the positioning hole (204) on the inner circumference of the ball positioning sleeve (2) and the rod body (1), and the diameter of the balls (5) is larger than the diameter of the inner opening of the positioning hole (204).

2. The novel transmission ball screw according to claim 1, characterized in that: The outer circumference of the rod (1) is integrally formed with a threaded groove (101).

3. The novel transmission ball screw according to claim 1, characterized in that: The ball positioning sleeve (2) includes an inner tube (201) and a connecting ring (202), wherein the inner tube (201) is movably installed on the outer circumference of the rod body (1).

4. A novel transmission ball screw according to claim 3, characterized in that: A connecting ring (202) is fixedly installed at the rear end of the inner tube (201).

5. A novel transmission ball screw according to claim 4, characterized in that: The connecting ring (202) has four connecting grooves (203) equidistantly arranged around its periphery, and the inner tube (201) has several positioning holes (204) equidistantly arranged around its circumference.

6. The novel transmission ball screw according to claim 1, characterized in that: The outer raceway sleeve (3) includes an outer tube (301) and a connecting block (302), wherein the outer tube (301) is fixedly installed on the outer circumferential wall of the inner tube (201).

7. A novel transmission ball screw according to claim 6, characterized in that: Four connecting blocks (302) are fixedly installed at equal intervals around the rear side of the outer tube (301), and the connecting blocks (302) fit and match the connecting groove (203).

8. A novel transmission ball screw according to claim 1, characterized in that: The ball positioning sleeve (2) is fixed together with the front side of the outer raceway sleeve (3) by a fixing nut (4) on the front side of the outer circumference of the ball positioning sleeve (2).

9. A novel transmission ball screw according to claim 5, characterized in that: The positioning holes (204) on the inner wall of the inner tube (201) are equidistantly mounted around the rod (1) with a number of ball bearings (5), the number of ball bearings (5) being the same as the number of positioning holes (204).

10. A novel transmission ball screw according to claim 9, characterized in that: The balls (5) are distributed on the threaded groove (101) of the rod (1) and between the inner wall of the inner tube (201).

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