Novel ball screw

Abstract

The utility model discloses a novel ball screw which comprises a screw body. The ball return mechanism is installed on the lead screw, a ball return groove is formed in the ball return mechanism and is S-shaped, the two ends of the ball return groove are matched and bordered with the outer spiral groove of the lead screw, the ball return groove is provided with an inlet and outlet, and the curve of the inlet and outlet is tangent to the spiral line of the outer spiral groove of the connected lead screw; the nut is arranged on the lead screw in a sleeving mode, and the inner spiral groove of the nut, the ball returning groove and the outer spiral groove of the lead screw jointly form a ball circulating track; and the plurality of balls are sequentially arranged in the ball circulating track. The machining process is relatively simple, time can be saved, and the production efficiency is greatly improved; the collision force and the friction torque of the ball and the reverser are reduced, so that the ball screw runs more smoothly, and the dynamic performance is obviously improved; extra abrasion of the ball screw is reduced, the service life of the ball screw is prolonged, looseness of the reverser caused by transmission gaps and ball impact is eliminated, the service life of the ball screw is prolonged, and the reliability of the ball screw is improved.

Description

Technical Field

[0001] This utility model relates to the field of ball screw technology, and in particular to a novel ball screw. Background Technology

[0002] In the current technology, most ball nuts on the market use a return mechanism installed inside the nut. The return mechanism groove on the nut is complex to machine, requiring high precision and complex processing technology, which leads to high processing difficulty. In addition, since the return mechanism needs to be installed inside the nut, the outer diameter of the nut is relatively large, and the processing difficulty of the return mechanism is also high. The high precision, complex processing technology and the processing of the return mechanism will increase production costs, processing difficulty and processing time. Summary of the Invention

[0003] According to an embodiment of the present invention, a novel ball screw is provided, comprising:

[0004] Lead screw;

[0005] The ball return mechanism is installed on the lead screw and has a ball return groove. The ball return groove is S-shaped and its two ends are matched and connected to the outer spiral groove of the lead screw. The ball return groove has an inlet and an outlet, and the curves of the inlet and outlet are tangent to the spiral line of the outer spiral groove of the lead screw.

[0006] The nut is fitted onto the lead screw, and the inner spiral groove and return groove of the nut together with the outer spiral groove of the lead screw form the ball circulation track;

[0007] Several balls are arranged in sequence in the ball circulation track.

[0008] Furthermore, the return bead mechanism includes: a matrix-type return device and a first mounting slot;

[0009] The first mounting slot is formed on the lead screw;

[0010] The matrix-type return unit is installed in the first mounting slot, and several ball return grooves are opened on the surface of the matrix-type return unit.

[0011] Furthermore, the first mounting groove is opened along the axial direction of the lead screw, and the first mounting groove is a square groove.

[0012] Furthermore, the return mechanism includes: several flat oval return elements and several second mounting slots;

[0013] Several second mounting slots are evenly spaced around the lead screw and are evenly spaced along the axial direction of the lead screw;

[0014] Several flat, round return switches are installed one-to-one in several second mounting slots, and the surface of the flat, round return switches is provided with ball return grooves.

[0015] Furthermore, the second mounting slot is flat and round.

[0016] Furthermore, the reversing device has a convex arc surface, which forms a coplanar circumferential surface with the outer circular surface of the lead screw.

[0017] The novel ball screw and its assembly method according to embodiments of the present invention, since the return device is installed on the screw, the processing technology is relatively simple, which can save time and greatly improve production efficiency; it reduces the collision force and friction torque between the balls and the return device, making the ball screw run more smoothly and significantly improving dynamic performance; it reduces additional wear on the screw, extends the service life of the ball screw, eliminates transmission backlash and return device loosening caused by ball impact, and improves the life and reliability of the ball screw.

[0018] It should be understood that both the foregoing general description and the following detailed description are exemplary and intended to provide further illustration of the claimed technology. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a novel ball screw according to an embodiment of the present invention;

[0020] Figure 2 This is a cross-sectional schematic diagram of a novel ball screw according to an embodiment of the present invention;

[0021] Figure 3 This is an internal schematic diagram of a first embodiment of the novel ball screw according to an embodiment of the present invention;

[0022] Figure 4 This is a cross-sectional schematic diagram of a second embodiment of the novel ball screw according to an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the interior of a second embodiment of the novel ball screw according to an embodiment of the present invention. Detailed Implementation

[0024] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, further illustrating the present invention.

[0025] First, combine Figures 1-5 This invention describes a novel ball screw and its assembly method according to embodiments of the present invention, which is applicable in the field of mechanical transmission technology and has a wide range of applications.

[0026] like Figures 1-5 As shown, the novel ball screw of this invention includes: a screw 1; a ball return mechanism, a nut 3, and a plurality of balls 4.

[0027] Specifically, such as Figures 1-5As shown, the ball return mechanism is installed on the lead screw 1. The ball return mechanism is provided with a ball return groove 21, which is S-shaped. The two ends of the ball return groove 21 are matched and connected to the outer spiral groove 11 of the lead screw 1. The ball return groove 21 has an inlet and an outlet. The curve of the inlet and outlet is tangent to the spiral line of the outer spiral groove 11 of the lead screw 1, ensuring the smoothness of the transition so as to facilitate the internal circulation of the balls 4. The nut 3 is fitted on the lead screw 1. The inner spiral groove of the nut 3, the ball return groove 21 and the outer spiral groove 11 of the lead screw 1 together form the ball 4 circulation track. Several balls 4 are arranged in sequence in the ball 4 circulation track. Since the ball return mechanism is installed on the lead screw 1, the processing technology is relatively simple, which can save time and greatly improve production efficiency; it reduces the collision force and friction torque between the ball 4 and the ball return mechanism, making the ball screw 1 run more smoothly and significantly improving its dynamic performance; it reduces the additional wear of the lead screw 1, extends the service life of the ball screw 1, eliminates transmission backlash and loosening of the ball return mechanism caused by the impact of the ball 4, and improves the life and reliability of the ball screw 1.

[0028] Example 1: As Figures 2-3 As shown, the ball return mechanism includes a matrix-type return mechanism 22 and a first mounting groove 23. The first mounting groove 23 is formed on the lead screw 1. The matrix-type return mechanism 22 is installed in the first mounting groove 23, and a plurality of ball return grooves 21 are formed on the surface of the matrix-type return mechanism 22. The first mounting groove 23 is formed along the axial direction of the lead screw 1, and the first mounting groove 23 is a square groove, which is simple and quick to process.

[0029] Example 2: Figures 4-5 As shown, the ball return mechanism includes: a plurality of flat, round returners 24 and a plurality of second mounting slots 25; the plurality of second mounting slots 25 are evenly spaced around the lead screw 1 and are evenly spaced along the axial direction of the lead screw 1; the plurality of flat, round returners 24 are installed one-to-one in the plurality of second mounting slots 25, and the surface of the flat, round returners 24 is provided with ball return grooves 21. The second mounting slots 25 are flat and round.

[0030] Furthermore, such as Figures 2-5 As shown, in this embodiment, the reversing device has a convex arc surface, which forms a coplanar circumferential surface with the outer circular surface of the lead screw 1, ensuring a smooth and continuous trajectory.

[0031] Above, refer to Figures 1-3 This invention describes a novel ball screw according to an embodiment of the present invention. Because the return mechanism is mounted on the screw, the manufacturing process is relatively simple, saving time and greatly improving production efficiency. It reduces the collision force and frictional torque between the balls and the return mechanism, making the ball screw run more smoothly and significantly improving its dynamic performance. It also reduces additional wear on the screw, extends the service life of the ball screw, eliminates transmission backlash and return mechanism loosening caused by ball impact, and improves the lifespan and reliability of the ball screw.

[0032] It should be noted that, in this specification, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes that element.

[0033] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above content. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A novel ball screw, characterized in that, Include: Lead screw; A ball return mechanism is mounted on the lead screw. The ball return mechanism has a ball return groove, which is S-shaped. Both ends of the ball return groove are matched and connected to the outer spiral groove of the lead screw. The ball return groove has an inlet and an outlet, and the curve of the inlet and outlet is tangent to the spiral line of the outer spiral groove of the connected lead screw. A nut is fitted onto the lead screw, and the inner spiral groove of the nut, the return ball groove, and the outer spiral groove of the lead screw together form a ball circulation track; A plurality of balls, which are arranged sequentially within the ball circulation track.

2. The novel ball screw as described in claim 1, characterized in that, The ball return mechanism includes: a matrix-type return device and a first mounting slot; The first mounting groove is formed on the lead screw; The matrix return device is installed in the first mounting slot, and the surface of the matrix return device has a plurality of return ball grooves.

3. The novel ball screw as described in claim 2, characterized in that, The first mounting groove is formed along the axial direction of the lead screw, and the first mounting groove is a square groove.

4. The novel ball screw as described in claim 1, characterized in that, The ball return mechanism includes: several flat oval returners and several second mounting slots; The plurality of second mounting slots are evenly spaced around the lead screw and are also evenly spaced along the axial direction of the lead screw. The plurality of flat, round return valves are installed one-to-one in the plurality of second mounting slots, and the return ball groove is formed on the surface of the flat, round return valve.

5. The novel ball screw as described in claim 4, characterized in that, The second mounting groove is flat and round.

6. The novel ball screw as described in claim 2 or 4, characterized in that, The reversing device has a convex arc surface, which forms a coplanar circumferential surface with the outer circular surface of the lead screw.

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