Novel ball speed reducer

Abstract

The utility model discloses a novel ball speed reducer which comprises a main shell, and an upper cover body is fixed to the top of the main shell. An input shaft is movably connected to a through hole in the middle of the upper cover body through a bearing, an input connecting part at the top end of the input shaft extends out of the top surface of the upper cover body, and a first eccentric convex part and a second eccentric convex part which are arranged up and down and opposite in eccentric direction are formed on the outer side wall of the lower part of the input shaft; the outer side wall of the first eccentric protruding part is movably connected with a first annular sleeve through a bearing, and the outer side wall of the second eccentric protruding part is movably connected with a second annular sleeve through a bearing. The upper ball and the lower ball are adopted for transmission, point contact is adopted, the contact area is small, noise is low, friction force is reduced, and therefore input torque can be reduced.

Description

Technical field:

[0001] The utility model relates to the technical field of reducer equipment, and more specifically to a novel ball reducer. Background technology:

[0002] The cycloid reducer is a novel transmission device that uses the planetary transmission principle and cycloid pin gear meshing. The entire transmission device of the cycloid pinwheel reducer can be divided into three parts: input part, reduction part, and output part.

[0003] A double eccentric sleeve offset by 180° is installed on the input shaft. Two roller bearings called swing arms are installed on the eccentric sleeve to form an H mechanism. The center holes of the two cycloid wheels are the raceways of the swing arm bearings on the eccentric sleeve. The cycloid wheel meshes with a group of circularly arranged needle teeth on the needle gear to form an internal meshing reduction mechanism with a tooth difference of one tooth.

[0004] However, the existing cycloid reducer generally uses a needle roller for transmission, and the contact between the needle roller and the needle teeth is a line contact, which increases the contact area, the friction force, and the noise. Utility model content:

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a novel ball reducer which adopts upper ball and lower ball transmission, which is point contact, has a small contact area, low noise, and reduces friction, thereby reducing the input torque.

[0006] The solution of the utility model to solve the technical problem is:

[0007] A novel ball reducer comprises a main housing, and an upper cover is fixed on the top of the main housing;

[0008] An input shaft is movably connected to the middle through hole of the upper cover body through a bearing, an input connection portion at the top of the input shaft extends out of the top surface of the upper cover body, and a first eccentric protrusion and a second eccentric protrusion arranged in an up-down manner and in opposite eccentric directions are formed on the outer side wall of the lower part of the input shaft; a first annular sleeve is movably connected to the outer side wall of the first eccentric protrusion through a bearing, and a second annular sleeve is movably connected to the outer side wall of the second eccentric protrusion through a bearing;

[0009] The bottom surface of the upper cover body is fixed with an inner gear sleeve body, and the upper side wall and the lower side wall of the inner gear sleeve body are formed with a plurality of upper through holes and a plurality of lower through holes evenly distributed around the central axis of the inner gear sleeve body, the upper balls are inserted into the corresponding upper through holes, and the lower balls are inserted into the corresponding lower through holes, and all the upper balls and the lower balls are arranged alternately;

[0010] An output shaft is movably connected to the middle through hole of the bottom plate of the main housing through a bearing, the upper part of the output shaft extends into the main housing, an outer gear sleeve body is fixed to the upper part of the output shaft, the upper outer wall of the outer gear sleeve body is movably connected to the upper inner wall of the main housing through a bearing, and a plurality of upper tooth-shaped protrusions and lower tooth-shaped protrusions are respectively formed on the upper inner wall and the lower inner wall of the outer gear sleeve body, which are evenly distributed with the central axis of the outer gear sleeve body as the center, an upper arc groove is formed between two adjacent upper tooth-shaped protrusions, and a lower arc groove is formed between two adjacent lower tooth-shaped protrusions;

[0011] The upper rolling balls are located between the outer side wall of the first annular sleeve and the corresponding upper arc groove, and the lower rolling balls are located between the outer side wall of the second annular sleeve and the corresponding lower arc groove.

[0012] Since all the upper balls and lower balls are arranged alternately, it can be ensured that the upper balls and lower balls alternately protrude outward or return inward along the upper through holes or the lower through holes, thereby driving the external outer gear sleeve to operate and realizing the rotation of the output shaft.

[0013] The bottom of the inner gear sleeve is fixedly connected with the lower connecting shell through bolts, and the bottom of the input shaft is movably connected to the inner side wall of the lower through hole of the lower connecting shell through a bearing.

[0014] A radial extension portion is formed on the top outer side wall of the output shaft, and the top surface of the radial extension portion is fixedly connected to the outer gear sleeve body by bolts.

[0015] The outstanding effects of the utility model are:

[0016] It adopts upper ball and lower ball transmission, which is point contact, small contact area, low noise, and reduced friction, so that the input torque can be reduced. Description of the drawings:

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a top view of the utility model;

[0019] Figure 3 yes Figure 2 AA section view;

[0020] Figure 4 It is a side view of the utility model;

[0021] Figure 5 yes Figure 4 CC section view;

[0022] Figure 6 yes Figure 4 DD cross-sectional view;

[0023] Figure 7 It is a partial structural schematic diagram of the outer gear sleeve. Specific implementation method:

[0024] For example, see Figures 1 to 7 As shown (all bearings in the drawings are simply schematic), a new type of ball reducer includes a main housing 10, and the top of the main housing 10 is fixedly connected to an upper cover 20 by bolts;

[0025] An extension sleeve extending upward is formed on the top of the inner side wall at the middle through hole of the upper cover body 20, and the extension sleeve is movably connected to the input shaft 30 through a bearing. The input connection portion at the top of the input shaft 30 extends out of the top surface of the upper cover body 20, and a first eccentric protrusion 31 and a second eccentric protrusion 32 (the eccentric directions are 180°) arranged in an up-and-down manner and in opposite eccentric directions are formed on the outer side wall of the lower part of the input shaft 30; a first annular sleeve 311 is movably connected to the outer side wall of the first eccentric protrusion 31 through a bearing, and a second annular sleeve 321 is movably connected to the outer side wall of the second eccentric protrusion 32 through a bearing;

[0026] The bottom surface of the upper cover body 20 is fixedly connected to the inner gear sleeve body 21 by a plurality of fixing bolts. The upper side wall and the lower side wall of the inner gear sleeve body 21 are formed with a plurality of upper through holes 211 and a plurality of lower through holes 212 which are evenly distributed around the central axis of the inner gear sleeve body 21. The upper balls 1 are inserted into the corresponding upper through holes 211, and the lower balls 2 are inserted into the corresponding lower through holes 212. All the upper balls 1 and the lower balls 2 are arranged alternately, that is, the part between every two lower balls 2 faces an upper upper ball 1, and the part between every two upper balls 1 faces a lower lower ball 2.

[0027] A downwardly extending sleeve is formed at the bottom of the inner wall at the middle through hole of the bottom plate of the main housing 10, and the output shaft 40 is movably connected to the sleeve via a bearing. The upper part of the output shaft 40 extends into the main housing 10, and a radial extension portion 41 is formed on the top outer wall of the output shaft 40. The top surface of the radial extension portion 41 is fixedly connected to an external gear sleeve 50 via a plurality of bolts.

[0028] Further, the upper outer side wall of the outer gear sleeve body 50 is movably connected to the upper inner side wall of the main housing 10 through a bearing, and the upper inner side wall and the lower inner side wall of the outer gear sleeve body 50 are respectively formed with a plurality of upper tooth-shaped protrusions 51 and a plurality of lower tooth-shaped protrusions 52 uniformly distributed around the central axis of the outer gear sleeve body 50, an upper arc groove is formed between two adjacent upper tooth-shaped protrusions 51, and a lower arc groove is formed between two adjacent lower tooth-shaped protrusions 52, and the upper arc grooves and the lower arc grooves correspond to each other one by one;

[0029] The upper ball 1 is located between the outer wall of the first annular sleeve 311 and the corresponding upper arc groove, and the lower ball 2 is located between the outer wall of the second annular sleeve 321 and the corresponding lower arc groove.

[0030] Furthermore, the bottom of the inner gear sleeve 21 is fixedly connected to the lower connecting housing 22 via bolts, and the bottom of the input shaft 30 is movably connected to the inner side wall of the lower through hole of the lower connecting housing 22 via a bearing.

[0031] A connecting hole 410 extending upward is formed in the middle of the bottom end of the output shaft 40 .

[0032] A keyway is formed on the lower outer side wall of the output shaft 40 .

[0033] Furthermore, an upper sealing cover 23 is provided above the middle through hole of the upper cover body 20, and the upper sealing cover 23 is fixedly connected to the top surface of the extension sleeve formed on the middle top surface of the upper cover body 20 by bolts, and the top of the output shaft 40 extends out of the middle through hole of the upper sealing cover 23, and an upper elastic sealing ring 231 is clamped on the inner side wall of the middle through hole of the upper sealing cover 23, and the outer side wall of the input shaft 30 is pressed against the inner side wall of the upper elastic sealing ring 231. The upper elastic sealing ring 231 can seal the input shaft 30 to prevent dust.

[0034] Furthermore, a lower sealing cover 11 is fixed to the bottom surface of the bottom plate of the main housing 10, the bottom of the output shaft 40 extends out of the middle through hole of the lower sealing cover 11, a lower elastic sealing ring 12 is clamped on the inner side wall of the middle through hole of the lower sealing cover 11, and the inner side wall of the lower elastic sealing ring 12 is pressed against the outer side wall of the output shaft 40. The lower elastic sealing ring 12 seals the output shaft 40 to prevent dust.

[0035] At the same time, an oil inlet screw connection hole is formed on the side wall of the main shell 10, and a plug is screwed into the oil inlet screw connection hole to achieve sealing. When refueling is needed, the plug is removed and oil can be poured into the oil inlet screw connection hole to fill the entire main shell 10.

[0036] When this embodiment is in use, the input connection part at the top of the input shaft 30 is connected to the output shaft of the driving motor. The driving motor is operated to realize the rotation of the input shaft 30. At this time, the first annular sleeve 311 and the second annular sleeve 321 are driven to rotate eccentrically, and the corresponding upper ball 1 and the lower ball 2 are driven to move inward and outward along the corresponding upper through hole 211 or the lower through hole 212, thereby driving the external gear sleeve body 50 to rotate, so that the output shaft 40 rotates to realize output.

[0037] This embodiment uses the upper ball 1 and the lower ball 2 for transmission, which is point contact, with a small contact area, low noise, and reduced friction, so that the input torque can be reduced.

[0038] The above implementation modes are only used to illustrate the present invention, but not to limit the present invention. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also belong to the scope of the present invention. The scope of patent protection of the present invention should be limited by the claims.

Claims

1. A novel ball reducer, comprising a main housing (10), characterized in that: An upper cover (20) is fixed on the top of the main housing (10); An input shaft (30) is movably connected to the middle through hole of the upper cover body (20) via a bearing, an input connection portion at the top end of the input shaft (30) protrudes out of the top surface of the upper cover body (20), and a first eccentric protrusion (31) and a second eccentric protrusion (32) arranged in an up-and-down manner and in opposite eccentric directions are formed on the outer side wall of the lower part of the input shaft (30); a first annular sleeve (311) is movably connected to the outer side wall of the first eccentric protrusion (31) via a bearing, and a second annular sleeve (321) is movably connected to the outer side wall of the second eccentric protrusion (32) via a bearing; An inner gear sleeve body (21) is fixed to the bottom surface of the upper cover body (20); a plurality of upper through holes (211) and a plurality of lower through holes (212) are formed on the upper side wall and the lower side wall of the inner gear sleeve body (21) and are evenly distributed around the central axis of the inner gear sleeve body (21); the upper balls (1) are inserted into the corresponding upper through holes (211), and the lower balls (2) are inserted into the corresponding lower through holes (212); and all the upper balls (1) and the lower balls (2) are arranged in an alternating manner; An output shaft (40) is movably connected to a middle through hole of the bottom plate of the main housing (10) via a bearing, the upper part of the output shaft (40) extends into the main housing (10), an outer gear sleeve (50) is fixed to the upper part of the output shaft (40), the upper outer wall of the outer gear sleeve (50) is movably connected to the upper inner wall of the main housing (10) via a bearing, and a plurality of upper tooth-shaped protrusions (51) and lower tooth-shaped protrusions (52) are respectively formed on the upper inner wall and the lower inner wall of the outer gear sleeve (50) and are evenly distributed around the central axis of the outer gear sleeve (50), an upper arc groove is formed between two adjacent upper tooth-shaped protrusions (51), and a lower arc groove is formed between two adjacent lower tooth-shaped protrusions (52); The upper rolling ball (1) is located between the outer wall of the first annular sleeve (311) and the corresponding upper arc groove, and the lower rolling ball (2) is located between the outer wall of the second annular sleeve (321) and the corresponding lower arc groove.

2. A new type of ball reducer according to claim 1, characterized in that: The bottom of the inner gear sleeve (21) is fixedly connected to the lower connecting housing (22) via bolts, and the bottom of the input shaft (30) is movably connected to the inner side wall of the lower through hole of the lower connecting housing (22) via a bearing.

3. A new type of ball reducer according to claim 1, characterized in that: A radial extension portion (41) is formed on the top outer side wall of the output shaft (40), and the top surface of the radial extension portion (41) is fixedly connected to the outer gear sleeve body (50) by means of bolts.

4. A new type of ball reducer according to claim 1, characterized in that: A connecting hole (410) extending upward is formed in the middle of the bottom end of the output shaft (40).

5. The novel ball reducer according to claim 1 is characterized in that: A keyway is formed on the lower outer side wall of the output shaft (40).

6. A new type of ball reducer according to claim 1, characterized in that: An upper sealing cover (23) is provided above the middle through hole of the upper cover body (20). The upper sealing cover (23) is fixedly connected to the middle top surface of the upper cover body (20) by bolts. The top of the input shaft (30) extends out of the middle through hole of the upper sealing cover (23). An upper elastic sealing ring (231) is clamped on the inner side wall of the middle through hole of the upper sealing cover (23). The outer side wall of the input shaft (30) is pressed against the inner side wall of the upper elastic sealing ring (231).

7. A new type of ball reducer according to claim 1, characterized in that: A lower sealing cover (11) is fixed to the bottom surface of the bottom plate of the main housing (10); the bottom of the output shaft (40) extends out of the middle through hole of the lower sealing cover (11); a lower elastic sealing ring (12) is clamped on the inner side wall of the middle through hole of the lower sealing cover (11); and the inner side wall of the lower elastic sealing ring (12) is pressed against the outer side wall of the output shaft (40).

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