Internal circulation ball screw

Abstract

The utility model relates to an internal circulation ball screw which comprises a screw body, a circulation groove formed by inwards sinking from the surface of the screw body, the circulation groove surrounds the screw body and comprises a first section of groove and a second section of groove, the first section of groove spirally extends along the surface of the screw body, and the second section of groove spirally extends along the surface of the screw body. The second section of groove and the first section of groove are connected end to end to form a closed ring; the external member is provided with a containing cavity, an internal thread groove is formed in the inner wall of the containing cavity, the internal thread groove spirally extends along the surface of the screw rod body, the screw rod body extends into the containing cavity, and the first section of groove corresponds to the internal thread groove; the balls move along the circulating groove and the internal thread groove; the circulating groove is formed in the surface of the screw body and corresponds to the internal thread groove in the inner wall of the external member, so that the ball rotates along the circulating groove, the internal thread groove and the screw, the situation that grooves of different shapes are machined in the inner wall is avoided, and the machining difficulty is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicle parts, and in particular to an internal circulation ball screw. Background Art

[0002] A ball screw is a transmission mechanical component in which a steel ball moves between a nut and a screw, converting the sliding contact of a traditional screw into rolling contact and then converting the rotational motion of the steel ball inside the nut into linear motion. Ball screws have the characteristics of high positioning accuracy, long life, low pollution, and the ability to perform high-speed forward and reverse transmission and conversion transmission. They are widely used in automotive parts.

[0003] According to Chinese patent CN219692089U, a brake screw kit is disclosed, which includes a main body, mounting holes running through the upper and lower surfaces of the main body, a receiving groove formed by an inward depression from the inner wall of the main body, and a plurality of sliding balls installed in the receiving groove. By opening a first section of groove, a second section of groove, a third section of groove, and a fourth section of groove on the inner wall of the main body, the plurality of sliding balls can be evenly placed between the receiving groove and the slide rail, which not only improves the strength of the main body, but also enhances the smoothness of the kit and the screw. However, it is necessary to process grooves of different shapes on the inner wall of the main body, which is difficult to process.

[0004] Therefore, it is necessary to develop an internal circulation ball screw to solve the above problems. Utility Model Content

[0005] The utility model aims to provide an internal circulation ball screw kit which is easy to process.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: an internal circulation ball screw, comprising:

[0007] The screw body has a circulating groove formed inwardly from its surface, the circulating groove surrounding the screw body, including a first groove section and a second groove section, the first groove section spirally extending along the surface of the screw body, and the second groove section and the first groove section connected end to end to form a closed loop;

[0008] The kit comprises a receiving cavity, an inner thread groove is provided on the inner wall of the receiving cavity, the inner thread groove spirally extends along the surface of the screw body, the screw body extends into the receiving cavity, and the first section of the groove corresponds to the inner thread groove;

[0009] A plurality of balls move along the circulation groove and the internal thread groove.

[0010] Furthermore, the second section of the groove extends spirally along the surface of the screw body and is connected end to end with the first section of the groove.

[0011] Furthermore, the spiral extension direction of the first section of the groove is different from the spiral extension direction of the second section of the groove.

[0012] Furthermore, the number of the circulation grooves is four, and the four circulation grooves are arranged relatively parallel.

[0013] Furthermore, the circulation groove includes a first circulation groove, a second circulation groove, a third circulation groove and a fourth circulation groove, which are arranged in sequence from the end of the screw body and have the same spacing.

[0014] Furthermore, the second sections of grooves of adjacent circulation grooves are spaced apart by a certain distance.

[0015] Furthermore, the internal thread groove spirally extends along the inner wall of the receiving cavity, extending from the top of the receiving cavity to the bottom thereof.

[0016] Furthermore, a portion of the ball is located in the circulation groove, and another portion extends into the internal thread groove.

[0017] Furthermore, a plurality of the balls are closely arranged in the circulation groove.

[0018] Compared with the existing technology, the beneficial effect of the utility model is that: the utility model is an internal circulation ball screw, which is easy to process. By opening a circulation groove on the surface of the screw body, which corresponds to the internal thread groove on the inner wall of the kit, the ball rotates along the circulation groove and the internal thread groove, avoiding the processing of grooves of different shapes on the inner wall and reducing the processing difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. Among them:

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of an internal circulation ball screw of the utility model;

[0021] Figure 2 for Figure 1 Schematic diagram of the exploded structure of the internal circulation ball screw shown;

[0022] Figure 3 for Figure 2 Schematic diagram of the screw body structure of the internal circulation ball screw shown.

[0023] In the figure: 1. screw body; 2. kit; 3. ball; 11. circulation groove; 111. first section groove; 112. second section groove; 113. first circulation groove; 114. second circulation groove; 115. third circulation groove; 116. fourth circulation groove; 21. receiving chamber; 22. internal thread groove. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] Please see Figures 1 to 3 The utility model is an internal circulation ball screw, which includes a screw body 1, a sleeve 2 connected to the screw body 1, and a ball 3 arranged between the screw body 1 and the sleeve 2.

[0026] Please see Figures 1 to 3 The screw body 1 is an axis body, which has a circulation groove 11 recessed inward from its surface. The circulation groove 11 extends along the surface of the screw body 1. The circulation groove 11 includes a first-section groove 111 and a second-section groove 112 connected to the first-section groove 111. The first-section groove 111 extends obliquely on the surface of the screw body 1, and the second-section groove 112 extends obliquely on the surface of the screw body 1. The extension direction of the second-section groove 112 is different from the extension direction of the first-section groove 111, and the second-section groove 112 forms an angle with the first-section groove 111.

[0027] Specifically, the first section groove 111 extends spirally along the surface of the screw body 1, and the second section groove 112 extends spirally along the surface of the screw body 1. The spiral extension direction of the first section groove 111 is different from the spiral extension direction of the second section groove 112, and the two ends of the second section groove 112 are connected to the two ends of the first section groove 111.

[0028] Please see Figure 3 More specifically, the number of circulation grooves 11 changes according to demand. In this embodiment, the number of circulation grooves 11 is four, and the four circulation grooves 11 are arranged relatively parallel, including a first circulation groove 113, a second circulation groove 114, a third circulation groove 115 and a fourth circulation groove 116. The first circulation groove 113, the second circulation groove 114, the third circulation groove 115 and the fourth circulation groove 116 have the same shape and are arranged in sequence from the end of the screw body 1 with the same spacing.

[0029] The second section grooves 112 of the adjacent circulating grooves 11 are spaced apart, specifically, the first circulating groove 113 is adjacent to the second circulating groove 114, the second section grooves 112 of the first circulating groove 113 are located obliquely below the second section grooves 112 of the second circulating groove 114, the second section grooves 112 of the second circulating groove 114 are located obliquely below the second section grooves 112 of the third circulating groove 115, and the second section grooves 112 of the third circulating groove 115 are located obliquely below the second section grooves 112 of the fourth circulating groove 116.

[0030] Please refer to Figure 2 The sleeve 2 has a receiving cavity 21 recessed inward from the end face thereof, and the receiving cavity 21 is used for receiving the screw body 1; in this embodiment, the diameter of the receiving cavity 21 is greater than the diameter of the screw body 1, the receiving cavity 21 is recessed inward from the inner wall surface to form an inner thread groove 22, and the inner thread groove 22 extends spirally along the inner wall of the receiving cavity 21 from the top to the bottom of the receiving cavity 21.

[0031] The helix angle of the first section groove 111 extending spirally along the surface of the screw body 1 is the same as the helix angle of the inner thread groove 22.

[0032] Please refer to Figure 3 The balls 3 are spherical bodies, and the number of the balls 3 is changed according to requirements and filled into the circulating grooves 11 respectively; the balls 3 are closely arranged in the circulating grooves 11, and a part of the balls 3 is located in the circulating grooves 11 and another part of the balls 3 extends into the inner thread groove 22.

[0033] In use, the screw body 1 extends into the sleeve 2, the circulating grooves 11 and the inner thread groove 22 correspond to each other, the first section groove 111 is parallel to the inner thread groove 22, the balls 3 are placed into the circulating grooves 11 and the inner thread groove 22, when the screw body 1 rotates, the balls 3 move spirally along the first section groove 111 and the inner thread groove 22, after moving a certain distance, the balls 3 move spirally to the original position through the second section groove 112, and then move spirally along the first section groove 111 and the inner thread groove 22 again, and the movement track of the balls 3 forms a closed loop.

[0034] The utility model discloses an inner circulating ball screw which has the characteristics of convenient processing, by setting the circulating grooves on the surface of the screw body, corresponding to the inner thread groove on the inner wall of the sleeve, the balls move along the circulating grooves and the inner thread groove, and the screw rotates, which avoids processing grooves of different shapes on the inner wall and reduces the processing difficulty.

[0035] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An internal circulation ball screw, characterized in that: It includes: The screw body (1) has a circulation groove (11) formed inwardly from the surface thereof, the circulation groove (11) surrounds the screw body (1) and includes a first section groove (111) and a second section groove (112), the first section groove (111) extending spirally along the surface of the screw body (1), and the second section groove (112) and the first section groove (111) are connected end to end to form a closed loop; The kit (2) has a receiving cavity (21), an inner thread groove (22) is provided on the inner wall of the receiving cavity (21), the inner thread groove (22) spirally extends along the surface of the screw body (1), the screw body (1) extends into the receiving cavity (21), and the first section groove (111) corresponds to the inner thread groove (22); A plurality of balls (3) move along the circulation groove (11) and the internal thread groove (22).

2. The internal circulation ball screw according to claim 1, characterized in that: The second section groove (112) extends spirally along the surface of the screw body (1) and is connected end to end with the first section groove (111).

3. The internal circulation ball screw according to claim 2, characterized in that: The spiral extension direction of the first section groove (111) is different from the spiral extension direction of the second section groove (112).

4. The internal circulation ball screw according to claim 1, characterized in that: The number of the circulation grooves (11) is four, and the four circulation grooves (11) are arranged relatively in parallel.

5. The internal circulation ball screw according to claim 4, characterized in that: The circulation groove (11) comprises a first circulation groove (113), a second circulation groove (114), a third circulation groove (115) and a fourth circulation groove (116), which are arranged in sequence from the end of the screw body (1) with the same spacing.

6. The internal circulation ball screw according to claim 1, characterized in that: The second sections of grooves (112) of adjacent circulation grooves (11) are spaced apart by a certain distance.

7. The internal circulation ball screw according to claim 1, characterized in that: The internal thread groove (22) spirally extends along the inner wall of the receiving cavity (21), extending from the top of the receiving cavity (21) to the bottom thereof.

8. The internal circulation ball screw according to claim 1, characterized in that: A portion of the ball (3) is located in the circulation groove (11), and another portion extends into the internal thread groove (22).

9. The internal circulation ball screw according to claim 8, characterized in that: A plurality of the balls (3) are closely arranged in the circulation groove (11).

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