Double-row ball type rotary drive

Abstract

The utility model discloses a double-row ball type rotary drive in the technical field of rotary drive, which comprises a shell, an outer gear ring, an inner ring and a sealing ring, an oil duct is arranged on the upper portion of the outer gear ring, balls are arranged between the outer gear ring and the inner ring, a worm and worm teeth are arranged in the shell, teeth are arranged on the outer ring of the outer gear ring, and the outer ring of the outer gear ring is provided with the sealing ring. A fixing part is arranged on the upper portion between the shell and the outer gear ring, a positioning ring is arranged on the top of the fixing part, sealing rings are arranged on the top and the bottom between the outer gear ring and the inner ring, a clamping groove is formed in the upper portion of the inner wall of the shell, and lubricating oil flows to the bottoms of balls arranged above through an oil channel to lubricate the balls. And then the lubricating oil flows downwards through a gap between the outer gear ring and the inner ring to lubricate balls arranged below, and meanwhile, the worm teeth and the balls are lubricated at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary drive, in particular to a double-row ball type rotary drive. Background Art

[0002] The slewing drive needs to be filled with lubricating oil to lubricate the slewing drive during operation to ensure that the slewing drive reduces its wear during the rotation process and extends its service life. For example, a slewing drive device disclosed in Chinese patent literature (patent number: CN201920080305.6) lubricates the inside of the slewing drive, and an inlet and an outlet are opened on the worm teeth. The lubricating oil lubricates the inside of the slewing drive through the inlet and outlet. However, opening an inlet and an outlet on the worm teeth reduces the strength of the worm teeth, reduces the scope of use of the slewing drive, and also reduces the service life of the slewing drive. The above patent describes the sealing of the ball bearings up and down, but the seal between the outer gear ring and the outer casing of the slewing drive is equally important.

[0003] For this purpose, we propose a double-row ball slewing drive. Utility Model Content

[0004] The purpose of the utility model is to provide a double-row ball rotary drive to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double-row ball rotary drive, comprising an outer shell, an outer gear ring and an inner ring, and a sealing ring, an oil channel is arranged on the upper part of the outer gear ring, a ball is arranged between the outer gear ring and the inner ring, a worm and worm teeth are arranged in the outer shell, and teeth are arranged on the outer ring of the outer gear, a fixing piece is arranged on the upper part between the outer shell and the outer gear ring, a positioning ring is arranged on the top of the fixing piece, sealing rings are arranged on the top and bottom between the outer gear ring and the inner ring, a card groove is arranged on the upper part of the inner wall of the outer shell, spring sheets are arranged on both sides of the positioning ring, and a card block is arranged on one side of the spring sheet.

[0006] Preferably, a threaded hole is provided on the shell, an oil filling hole is provided on the right side of the threaded hole, and a top screw is provided in the threaded hole.

[0007] Preferably, the threaded hole and the oil filling hole are arranged at the upper left part of the shell, and the diameter of the oil filling hole is smaller than the diameter of the threaded hole.

[0008] Preferably, the right end of the oil passage extends to the lower left portion of the ball, and the left end of the oil passage communicates with the interior of the housing.

[0009] Preferably, the relative surfaces of the outer gear ring and the inner ring are both provided with guide grooves cooperating with the balls, and the balls are provided in two groups.

[0010] Compared with the prior art, the utility model has the following beneficial effects: the positioning ring is pressed down, the spring piece is deformed, and when the clamping block moves to the clamping slot position, the spring piece pops up, and the clamping block clamps the clamping slot to quickly fix the fixing part, and oil is injected through the threaded hole and the oil injection hole. At this time, the rotary drive is started to rotate the rotary drive at a low speed, and lubricating oil is injected into the rotary drive through the oil injection hole. At this time, the rotary drive is in a rotating state, and the injected lubricating oil drips on the worm gear teeth. The rotation of the worm gear teeth throws off the lubricating oil on the surface, and a small amount of lubricating oil will be thrown off at the top of the tooth. The right end of the oil channel is tilted downward, and the lubricating oil flows through the oil channel to the bottom of the ball roller arranged above to lubricate the ball roller, and then the lubricating oil flows downward through the gap between the outer gear ring and the inner ring to lubricate the ball roller arranged below, and at the same time, the worm gear teeth and the space between the teeth and the ball roller are lubricated at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0013] Figure 3 This is an enlarged view of point A of the utility model;

[0014] Figure 4 This is a schematic diagram of the oil injection hole structure of the utility model.

[0015] In the figure: 1. outer casing; 2. outer gear ring; 3. inner ring; 4. oil channel; 5. ball; 6. worm; 7. worm gear; 8. gear; 9. fixing piece; 10. positioning ring; 11. sealing ring; 12. slot; 13. spring piece; 14. block; 15. threaded hole; 17. top screw; 16. oil filling hole. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] See also Figure 1-4The utility model provides a technical solution: a double-row ball rotary drive, including a shell 1, an outer gear ring 2, an inner ring 3, and a sealing ring 11. An oil passage 4 is arranged on the upper part of the outer gear ring 2, a ball 5 is arranged between the outer gear ring 2 and the inner ring 3, a worm 6 and worm teeth 7 are arranged in the shell 1, and a tooth 8 is arranged on the outer ring 2. A fixing member 9 is arranged on the upper part between the shell 1 and the outer gear ring 2, a positioning ring 10 is arranged on the top of the fixing member 9, and sealing rings 11 are arranged on the top and bottom between the outer gear ring 2 and the inner ring 3. A card slot 12 is arranged on the upper part of the inner wall of the shell 1, a spring sheet 13 is arranged on one side of the positioning ring 10, and a card block 14 is arranged on one side of the spring sheet 13. The fixing member 9 is installed After completion, install the positioning ring 10 on the upper part of the fixing member 9, move the positioning ring 10 downward, the spring piece 13 set on one side of the positioning ring 10 will move with the positioning ring 10, the clamping block 14 set on one side of the spring piece 13 is semicircular, and after the clamping block 14 contacts the shell 1, press down the positioning ring 10 with force, and the spring piece 13 is deformed. When the clamping block 14 moves to the position of the slot 12, the spring piece 13 pops up, and the clamping block 14 clamps the slot 12 to quickly fix the fixing member 9, and oil is injected into the rotary drive through the threaded hole 15 and the oil injection hole 16. At this time, start the rotary drive, make the rotary drive rotate at a low speed, and inject lubricating oil into the rotary drive through the oil injection hole 16. At this time, the rotary drive is in a rotating state, and the added lubricating oil drips onto the worm gear 7. The worm gear 7 rotates to throw off the lubricating oil on the surface, and a small amount of lubricating oil will be thrown off at the top of the tooth. The right end of the oil channel 4 is tilted downward, and the lubricating oil flows through the oil channel 4 to the bottom of the ball 5 arranged above to lubricate the ball 5. Then the lubricating oil flows downward through the gap between the outer gear ring 2 and the inner ring 3 to lubricate the ball arranged below, and at the same time, lubricates the space between the worm gear 7 and the tooth 8 and the ball 5 at the same time.

[0018] The outer shell 1 is provided with a threaded hole 15, an oil filling hole 16 is provided on the right side of the threaded hole 15, a top screw 17 is provided in the threaded hole 15, and a hexagonal groove is provided at one end of the top screw 17. Lubricating oil is added to the rotary drive. The top screw is loosened with a hexagonal wrench, and the oil filling hole 16 is opened, and the lubricating oil is added through the oil filling hole 16;

[0019] The threaded hole 15 and the oil filling hole 16 are arranged at the upper left part of the housing 1. The diameter of the oil filling hole 16 is smaller than that of the threaded hole 15. After the lubricating oil is filled, the top screw 17 is tightened. The top screw 17 presses against the left surface of the oil filling hole 16 to complete the closing of the oil filling hole 16.

[0020] The right end of the oil channel 4 extends to the lower left part of the ball 5, and the left end of the oil channel 4 is connected to the inside of the outer shell 1. The relative surfaces of the outer ring 2 and the inner ring 3 are provided with guide grooves matching the ball 5. There are two groups of balls 5. When the installation space is limited, this product has a greater load-bearing capacity compared with single-row ball products with the same external dimensions.

[0021] Working principle: the positioning ring 10 is installed on the upper part of the fixing member 9. When the positioning ring 10 is moved downward, the spring piece 13 arranged on one side of the positioning ring 10 will move with the positioning ring 10. The clamping block 14 arranged on one side of the spring piece 13 is semicircular. After the clamping block 14 contacts the shell 1, the positioning ring 10 is pressed down with force, and the spring piece 13 is deformed. When the clamping block 14 moves to the position of the slot 12, the spring piece 13 pops up, and the clamping block 14 clamps the slot 12 to quickly fix the fixing member 9. Oil is injected into the rotary drive through the threaded hole 15 and the oil injection hole 16. At this time, the rotary drive is started to rotate at a low speed, and lubricating oil is injected into the rotary drive through the oil injection hole 16. At this time, the rotary drive is in a rotating state, and the added lubricating oil drips onto the worm gear 7. The worm gear 7 rotates to throw off the lubricating oil on the surface, and a small amount of lubricating oil will be thrown off at the top of the tooth. The right end of the oil channel 4 is tilted downward, and the lubricating oil flows through the oil channel 4 to the bottom of the ball 5 arranged above to lubricate the ball 5. Then the lubricating oil flows downward through the gap between the outer gear ring 2 and the inner ring 3 to lubricate the ball arranged below, and at the same time, lubricates the space between the worm gear 7 and the tooth 8 and the ball 5 at the same time.

[0022] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-row ball rotary drive, comprising a housing (1), an outer gear ring (2), an inner ring (3), and a sealing ring (11), characterized in that: An oil passage (4) is provided at the upper part of the outer gear ring (2), a ball (5) is provided between the outer gear ring (2) and the inner ring (3), a worm (6) and worm teeth (7) are provided in the outer shell (1), the outer ring of the outer gear ring (2) is provided with teeth (8), a fixing member (9) is provided at the upper part between the outer shell (1) and the outer gear ring (2), a positioning ring (10) is provided at the top of the fixing member (9), a sealing ring (11) is provided at the top and bottom between the outer gear ring (2) and the inner ring (3), a clamping groove (12) is provided at the upper part of the inner wall of the outer shell (1), spring sheets (13) are provided on both sides of the positioning ring (10), and a clamping block (14) is provided on one side of the spring sheet (13).

2. A double-row ball rotary drive according to claim 1, characterized in that: The outer shell (1) is provided with a threaded hole (15), an oil filling hole (16) is provided on the right side of the threaded hole (15), and a top screw (17) is provided in the threaded hole (15).

3. A double-row ball rotary drive according to claim 2, characterized in that: The threaded hole (15) and the oil injection hole (16) are arranged at the upper left part of the housing (1); the diameter of the oil injection hole (16) is smaller than the diameter of the threaded hole (15).

4. A double-row ball rotary drive according to claim 1, characterized in that: The right end of the oil passage (4) extends to the lower left portion of the ball (5), and the left end of the oil passage (4) communicates with the interior of the housing (1).

5. The double-row ball rotary drive according to claim 1, characterized in that: The opposing surfaces of the outer gear ring (2) and the inner ring (3) are both provided with guide grooves matching with the balls (5), and the balls (5) are provided in two groups.

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