Rotary table of miniature excavator

Abstract

The utility model provides a rotary table of a miniature excavator, which relates to the technical field of rotary tables of miniature excavators and comprises a rotary table outer ring, a rotary table inner ring and a plurality of balls. When the rotating disc outer ring and the rotating disc inner ring rotate through a plurality of balls, the balls roll on the inner wall of the rotating disc outer ring and the outer surface of the rotating disc inner ring, the surfaces of the balls make contact with the surface of a rotating rod, the rotating rod is driven to rotate in a rotating hole, lubricating oil in an annular groove is brought out, and the balls are smeared with the lubricating oil; the surface of the rotating disc is lubricated, so that the rotating friction resistance between the outer surface of the ball and the inner wall of the rotating disc outer ring and the outer surface of the rotating disc inner ring is prevented from being reduced after the rotating disc is used for a long time, the rotating disc is not easy to make sound during movement, the rotating operation effect is improved, and the use of the rotating disc and the micro excavator is prevented from being influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of the turntable of a mini excavator, in particular to a turntable of a mini excavator. Background Art

[0002] The turntable of a mini excavator is an important part of the excavator, mainly located at the bottom of the excavator, playing the role of connecting the excavator and the bucket and enabling the bucket to rotate 360 degrees, so as to facilitate the excavator to carry out various operations.

[0003] When the turntable is installed at the bottom of the mini excavator for use, the rolling balls between the inner wall of the outer ring of the turntable and the outer surface of the inner ring of the turntable will continuously rotate and rub on the inner part of the outer ring of the turntable and the outer surface of the inner ring of the turntable. After long-term use, the outer surface of the rolling balls may age and corrode, resulting in an increase in the rotational friction resistance between the inner wall of the outer ring of the turntable and the outer surface of the inner ring of the turntable, which is likely to make a sound and cause the situation of unsmooth rotation, thus affecting the use of the turntable and the mini excavator. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the defects existing in the prior art, and a turntable of a mini excavator is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: a turntable of a mini excavator, comprising an outer turntable ring, an inner turntable ring and a plurality of rolling balls, the plurality of rolling balls are arranged between the inner wall of the outer turntable ring and the outer surface of the inner turntable ring, a lubricating device is arranged on the inner wall of the outer turntable ring, protective devices are arranged between both sides of the outer turntable ring and the inner turntable ring, the lubricating device comprises a threaded cover, an annular groove is formed inside the outer turntable ring, a threaded hole is formed in the inner wall of the annular groove, one end of the threaded cover is threadedly inserted into the inner wall of the threaded hole, a plurality of rotating holes are formed in the inner wall of the annular groove, the inner wall of the rotating hole is communicated with the inner wall of the outer turntable ring, and a rotating rod is rotatably connected to the inner wall of the rotating hole.

[0006] The effects achieved by the above components are as follows: By setting up a lubrication device, when the turntable is installed at the bottom of the mini-excavator for use, the threaded cap can be first screwed out of the threaded hole, and then lubricating oil can be injected into the annular groove through the threaded hole. The rotating hole will be blocked by the rotating rod, making it difficult for the injected lubricating oil to overflow. When the outer ring and the inner ring of the turntable rotate through a number of balls, the balls will roll on the inner wall of the outer ring of the turntable and the outer surface of the inner ring of the turntable. The surface of the balls will contact the surface of the rotating rod, driving the rotating rod to rotate in the rotating hole, taking out the lubricating oil inside the annular groove and smearing it on the balls to lubricate their surfaces, avoiding reducing the rotational friction resistance between the outer surface of the balls and the inner wall of the outer ring of the turntable and the outer surface of the inner ring of the turntable after long-term use, making it not easy to make a sound during movement, improving the effect of rotational operation, and avoiding affecting the use of the turntable and the mini-excavator.

[0007] Preferably, a screwing groove is formed on one side of the threaded cap, and the cross-section of the screwing groove is hexagonal.

[0008] The effects achieved by the above components are as follows: By setting up the screwing groove, when it is inconvenient to manually screw the threaded cap, a corresponding-shaped screwing tool can be inserted into the screwing groove to screw it, which can facilitate screwing the threaded cap and is convenient for its installation and disassembly.

[0009] Preferably, a receiving groove is formed on the outer surface of the outer ring of the turntable, the inner wall of the receiving groove is connected to the inner wall of the threaded hole, and one end of the threaded cap is inserted into the inner wall of the receiving groove.

[0010] The effects achieved by the above components are as follows: By setting up the receiving groove, after one end of the threaded cap is screwed into the inner wall of the screw hole block to a certain position, one end of the threaded cap can be completely received into the receiving groove, avoiding the threaded cap protruding on the outer surface of the outer ring of the turntable and affecting the use of the turntable.

[0011] Preferably, a sealing ring block is fixedly connected to one side of the threaded cap. The inner wall size of the sealing ring block is larger than the inner wall size of the threaded hole, and the outer surface size of the sealing ring block is smaller than the inner wall size of the receiving groove.

[0012] The effects achieved by the above components are as follows: By setting up the sealing ring block, after one end of the threaded cap is screwed into the threaded hole to a certain position and one end is received in the receiving groove, the sealing ring block will abut against the bottom of the inner wall of the receiving groove, sealing the gaps between the threaded cap, the threaded hole and the receiving groove, avoiding the lubricating oil inside the annular groove from overflowing through the threaded hole, and improving the use sealing performance of the threaded cap.

[0013] Preferably, a number of sponge blocks are fixedly connected to the outer surface of the rotating rod, and the number of sponge blocks is arranged at equal distances.

[0014] The effects achieved by the above components are as follows: By setting the sponge block, the sponge block can adsorb the lubricating oil, and then evenly apply it to the ball as the rotating rod rotates, making the application more uniform.

[0015] Preferably, the protection device includes a dust-proof ring cover, which is inserted into the inner wall of the outer ring of the turntable. The inner wall of the outer ring of the turntable is symmetrically provided with clamping grooves. Both ends of one side of the inner wall of the dust-proof ring cover are fixedly connected with springs. One end of the spring is fixedly connected with a clamping block, which is slidably connected with the inner wall of the dust-proof ring cover. One end of the clamping block is inserted into the inner wall of the clamping groove.

[0016] The effects achieved by the above components are as follows: By setting the protection device, before installing the turntable on the mini-excavator for use, the clamping block can be manually slid to a certain position at one end in the inner wall of the dust-proof ring cover, driving the spring to contract. Then, the dust-proof ring cover is inserted into the inner wall of the outer ring of the turntable, so that the outer surface of one end of the dust-proof ring block abuts against the inner wall of the outer ring of the turntable, and the other end is closely attached to one side of the inner ring of the turntable. Then, the clamping block is released. Under the reset action of the spring, one end of the clamping block can be clamped into the inner wall of the clamping groove, fixing and limiting the dust-proof ring cover in the inner wall of the outer ring of the turntable, protecting and covering the gap between the outer ring and the inner ring of the turntable, so that dust and impurities are not easily fallen into it and cause jamming, affecting the use of the turntable. At the same time, the dust-proof ring cover is not connected to the inner ring of the turntable, so it does not affect the rotation.

[0017] Preferably, a rectangular groove is provided on one side of the clamping block, and the rectangular groove is arranged on the side of the clamping block away from the clamping groove.

[0018] The effects achieved by the above components are as follows: By setting the rectangular groove, there is a certain space between one end of the clamping block and the inner wall of the outer ring of the turntable, which is convenient for manually buckling and pulling it.

[0019] Preferably, a telescopic rod is fixedly connected to the inner wall of the dust-proof ring cover. One end of the telescopic rod is fixedly connected to one side of the clamping block, and the outer surface of the telescopic rod is sleeved and connected with the inner wall of the spring.

[0020] The effects achieved by the above components are as follows: By setting the telescopic rod, it can play a role in supporting and strengthening the inner wall of the spring, so that it is not easily damaged during use.

[0021] Compared with the prior art, the advantages and positive effects of the present utility model are as follows:

[0022] In the present utility model, by providing a lubricating device, when the turntable is installed at the bottom of the mini-excavator for use, the threaded cap can be first screwed out from the threaded hole, and then lubricating oil can be injected into the annular groove through the threaded hole. The rotating hole will be blocked by the rotating rod, making it difficult for the injected lubricating oil to overflow. When the outer ring and the inner ring of the turntable rotate through a number of balls, the balls will roll on the inner wall of the outer ring of the turntable and the outer surface of the inner ring of the turntable. The surface of the balls will contact the surface of the rotating rod, driving the rotating rod to rotate in the rotating hole, taking out the lubricating oil inside the annular groove and smearing it on the balls to lubricate their surfaces, so as to avoid reducing the rotational friction resistance between the outer surface of the balls and the inner wall of the outer ring of the turntable and the outer surface of the inner ring of the turntable after long-term use, making it difficult to make noise during movement and improving the effect of rotational operation, and avoiding affecting the use of the turntable and the mini-excavator. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a three-dimensional structural diagram of the present utility model;

[0024] Figure 2 is a three-dimensional structural diagram of the outer ring of the turntable of the present utility model;

[0025] Figure 3 is Figure 2 a partial three-dimensional structural diagram in

[0026] Figure 4 is a three-dimensional structural diagram of the threaded cap of the present utility model;

[0027] Figure 5 is a three-dimensional structural diagram of the sealing ring block of the present utility model;

[0028] Figure 6 is a three-dimensional structural diagram of the dust-proof replacement cap of the present utility model;

[0029] Figure 7 is Figure 6 an enlarged three-dimensional structural diagram at A in

[0030] Legend: 1. Outer ring of the turntable; 2. Lubricating device; 3. Protective device; 4. Inner ring of the turntable; 5. Ball; 21. Annular groove; 22. Threaded hole; 23. Rotating hole; 24. Rotating rod; 25. Threaded cap; 26. Screw groove; 27. Sealing ring block; 28. Sponge block; 29. Storage groove; 31. Card slot; 32. Dust-proof ring cap; 33. Spring; 34. Block; 35. Rectangular groove; 36. Telescopic rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] Example 1, as Figures 1-7As shown in the figure, a turntable of a mini excavator includes an outer turntable ring 1, an inner turntable ring 4, and a number of balls 5. The number of balls 5 is arranged between the inner wall of the outer turntable ring 1 and the outer surface of the inner turntable ring 4. A lubrication device 2 is provided on the inner wall of the outer turntable ring 1. Protective devices 3 are provided on both sides between the outer turntable ring 1 and the inner turntable ring 4. The lubrication device 2 includes a threaded cover 25. An annular groove 21 is formed inside the outer turntable ring 1. Threaded holes 22 are formed in the inner wall of the annular groove 21. One end of the threaded cover 25 is threadedly inserted into the inner wall of the threaded hole 22. A number of rotating holes 23 are formed in the inner wall of the annular groove 21. The inner wall of the rotating hole 23 is communicated with the inner wall of the outer turntable ring 1. A rotating rod 24 is rotatably connected to the inner wall of the rotating hole 23. When installing the turntable at the bottom of the mini excavator for use, the threaded cover 25 can be first screwed out from the threaded hole 22, and then lubricating oil can be injected into the annular groove 21 through the threaded hole 22. The rotating hole 23 will be blocked by the rotating rod 24, making the injected lubricating oil not easy to overflow. When the outer turntable ring 1 and the inner turntable ring 4 rotate through a number of balls 5, the balls 5 will roll on the inner wall of the outer turntable ring 1 and the outer surface of the inner turntable ring 4. The surface of the balls 5 will contact the surface of the rotating rod 24, driving the rotating rod 24 to rotate in the rotating hole 23, taking out the lubricating oil inside the annular groove 21, smearing it on the balls 5, and lubricating its surface, so as to avoid reducing the rotational friction resistance between the outer surface of the balls 5 and the inner wall of the outer turntable ring 1 and the outer surface of the inner turntable ring 4 after long-term use, making it not easy to make a sound during movement, improving the rotational operation effect, and avoiding affecting the use of the turntable and the mini excavator.

[0032] Refer to Figures 2-5 As shown in the figure, in this embodiment, a wrench groove 26 is formed on one side of the threaded rod. The cross-section of the wrench groove 26 is hexagonal. By providing the wrench groove 26, when it is not convenient to manually turn the threaded cover 25, a corresponding-shaped turning tool can be inserted into the wrench groove 26 to turn it, which can facilitate turning the threaded cover 25 and is convenient for its installation and disassembly. A storage groove 29 is formed on the outer surface of the outer turntable ring 1. The inner wall of the storage groove 29 is communicated with the inner wall of the threaded hole 22. One end of the threaded cover 25 is inserted into the inner wall of the storage groove 29. By providing the storage groove 29, after one end of the threaded cover 25 is screwed into the inner wall of the threaded hole block to a certain position, one end of the threaded cover 25 can be completely stored in the storage groove 29, avoiding the threaded cover 25 protruding on the outer surface of the outer turntable ring 1 and affecting the use of the turntable.

[0033] Refer to Figures 2-5As shown, in this embodiment, a sealing ring block 27 is fixedly connected to one side of the threaded cap 25. The inner wall size of the sealing ring block 27 is larger than that of the inner wall of the threaded hole 22, and the outer surface size of the sealing ring block 27 is smaller than that of the inner wall of the receiving groove 29. By providing the sealing ring block 27, after one end of the threaded cap 25 is screwed into the threaded hole 22 to a certain position and then received in the receiving groove 29 at one end, the sealing ring block 27 will abut against the bottom of the inner wall of the receiving groove 29, sealing the gap between the threaded cap 25, the threaded hole 22 and the receiving groove 29, and preventing the lubricant inside the annular groove 21 from overflowing from the threaded hole 22, thereby improving the sealing performance of the threaded cap 25. A number of sponge blocks 28 are fixedly connected to the outer surface of the rotating rod 24, and the number of sponge blocks 28 are arranged at equal distances. By providing the sponge blocks 28, the sponge blocks 28 can adsorb the lubricating oil and then evenly apply it to the balls 5 as the rotating rod 24 rotates, making the application more uniform.

[0034] Referring to Figure 6 and Figure 7 As shown, in this embodiment, the protective device 3 includes a dust-proof ring cover 32. The dust-proof ring cover 32 is inserted into the inner wall of the outer ring 1 of the turntable. The inner wall of the outer ring 1 of the turntable is symmetrically provided with clamping grooves 31. Springs 33 are fixedly connected to both ends of the inner wall on one side of the dust-proof ring cover 32. One end of the spring 33 is fixedly connected with a clamping block 34. The clamping block 34 is slidably connected to the inner wall of the dust-proof ring cover 32. One end of the clamping block 34 is inserted into the inner wall of the clamping groove 31. Before the turntable is installed on the mini excavator for use, the clamping block 34 can be manually slid to one end in the inner wall of the dust-proof ring cover 32 to a certain position, driving the spring 33 to contract. Then, the dust-proof ring cover 32 is inserted into the inner wall of the outer ring of the turntable, so that the outer surface of one end of the dust-proof ring block abuts against the inner wall of the outer ring 1 of the turntable, and the other end is closely attached to one side of the inner ring of the turntable. Then, the clamping block 34 is released. Under the reset action of the spring 33, one end of the clamping block 34 can be clamped into the inner wall of the clamping groove 31, fixing and limiting the dust-proof ring cover 32 in the inner wall of the outer ring 1 of the turntable, protecting and covering the gap between the outer ring 1 of the turntable and the inner ring 4 of the turntable, so that dust and impurities are not easily fallen into it and cause jamming to affect the use of the turntable. At the same time, the dust-proof ring cover 32 is not connected to the inner ring 4 of the turntable, so it does not affect the rotation.

[0035] Referring to Figure 6 and Figure 7As shown in the figure, in this embodiment, a rectangular groove 35 is provided on one side of the clamping block 34. The rectangular groove 35 is arranged on the side of the clamping block 34 away from the clamping groove 31. By providing the rectangular groove 35, a certain space can be formed between one end of the clamping block 34 and the inner wall of the outer ring 1 of the turntable, which is convenient for manually buckling and pulling it. A telescopic rod 36 is fixedly connected to the inner wall of the dust-proof ring cover 32. One end of the telescopic rod 36 is fixedly connected to one side of the clamping block 34. The outer surface of the telescopic rod 36 is sleeved and connected with the inner wall of the spring 33. By providing the telescopic rod 36, it can play a role in supporting and strengthening the inner wall of the spring 33, so that it is not easily damaged during use.

[0036] Working principle: When the turntable is installed at the bottom of the mini-excavator for use, the threaded cover 25 can be first screwed out from the threaded hole 22 and the storage groove 29, and then lubricating oil can be injected into the annular groove 21 through the threaded hole 22. The rotating hole 23 will be blocked by the rotating rod 24 and several sponge blocks 28, so that the injected lubricating oil is not easily spilled. When the outer ring 1 of the turntable and the inner ring 4 of the turntable rotate through several rolling balls 5, the rolling balls 5 will roll on the inner wall of the outer ring 1 of the turntable and the outer surface of the inner ring 4 of the turntable. The surface of the rolling balls 5 will contact the surface of the rotating rod 24 and the sponge blocks 28, driving the rotating rod 24 and the sponge blocks 28 to rotate in the rotating hole 23. The sponge blocks 28 are internally infiltrated with lubricating oil, and then it is evenly smeared on the rolling balls 5 to lubricate their surfaces, avoiding reducing the rotational friction resistance between the outer surface of the rolling balls 5 and the inner wall of the outer ring 1 of the turntable and the outer surface of the inner ring 4 of the turntable after long-term use, making it not easy to make a sound during movement, improving the rotational operation effect, and avoiding affecting the use of the turntable and the mini-excavator.

[0037] Before installing the turntable on the mini-excavator for use, the clamping block 34 can be manually slid to a certain position at one end in the inner wall of the dust-proof ring cover 32, driving the spring 33 and the telescopic rod 36 to contract. Then, the dust-proof ring cover 32 is inserted into the inner wall of the outer ring of the turntable, so that the outer surface of one end of the dust-proof ring block abuts against the inner wall of the outer ring 1 of the turntable, and the other end is closely attached to one side of the inner ring of the turntable. Then, the clamping block 34 is released. Under the reset action of the spring 33 and the telescopic rod 36, one end of the clamping block 34 can be clamped into the inner wall of the clamping groove 31, fixing and limiting the dust-proof ring cover 32 in the inner wall of the outer ring 1 of the turntable, protecting and covering the gap between the outer ring 1 of the turntable and the inner ring 4 of the turntable, so that dust and impurities are not easily fallen into it and cause jamming to affect the use of the turntable. At the same time, the dust-proof ring cover 32 is not connected to the inner ring 4 of the turntable, so it does not affect rotation.

Claims

1. A turntable for a mini excavator, comprising a turntable outer ring (1), a turntable inner ring (4) and a plurality of balls (5), characterized in that: The plurality of balls (5) are arranged between the inner wall of the turntable outer ring (1) and the outer surface of the turntable inner ring (4); the inner wall of the turntable outer ring (1) is provided with a lubricating device (2); a protective device (3) is provided between both sides of the turntable outer ring (1) and the turntable inner ring (4); the lubricating device (2) comprises a threaded cover (25); an annular groove (21) is provided inside the turntable outer ring (1); a threaded hole (22) is provided on the inner wall of the annular groove (21); one end of the threaded cover (25) is threadedly inserted into the inner wall of the threaded hole (22); a plurality of rotating holes (23) are provided on the inner wall of the turntable outer ring (21); the inner wall of the rotating hole (23) is connected to the inner wall of the turntable outer ring (1); and a rotating rod (24) is rotatably connected to the inner wall of the rotating hole (23).

2. A mini excavator turntable according to claim 1, characterized in that: A screw groove (26) is provided on one side of the threaded cover, and the cross section of the screw groove (26) is in a hexagonal shape.

3. The mini excavator turntable according to claim 1, characterized in that: The outer surface of the turntable outer ring (1) is provided with a receiving groove (29), the inner wall of the receiving groove (29) is connected to the inner wall of the threaded hole (22), and one end of the threaded cover (25) is inserted into the inner wall of the receiving groove (29).

4. The mini excavator turntable according to claim 3, characterized in that: A sealing ring block (27) is fixedly connected to one side of the threaded cover (25); the inner wall size of the sealing ring block (27) is larger than the inner wall size of the threaded hole (22); and the outer surface size of the sealing ring block (27) is smaller than the inner wall size of the receiving groove (29).

5. The mini excavator turntable according to claim 1, characterized in that: A plurality of sponge blocks (28) are fixedly connected to the outer surface of the rotating rod (24), and the plurality of sponge blocks (28) are arranged at equal distances.

6. The mini excavator turntable according to claim 1, characterized in that: The protective device (3) comprises a dustproof ring cover (32), the dustproof ring cover (32) being inserted into the inner wall of the turntable outer ring (1), the inner wall of the turntable outer ring (1) being symmetrically provided with a clamping groove (31), springs (33) being fixedly connected to the inner walls at both ends of one side of the dustproof ring cover (32), one end of the spring (33) being fixedly connected to a clamping block (34), the clamping block (34) being slidably connected to the inner wall of the dustproof ring cover (32), and one end of the clamping block (34) being inserted into the inner wall of the clamping groove (31).

7. A mini excavator turntable according to claim 6, characterized in that: A rectangular groove (35) is provided on one side of the clamping block (34), and the rectangular groove (35) is arranged on a side of the clamping block (34) away from the clamping groove (31).

8. The mini excavator turntable according to claim 6, characterized in that: A telescopic rod (36) is fixedly connected to the inner wall of the dustproof ring cover (32), one end of the telescopic rod (36) is fixedly connected to one side of the clamping block (34), and the outer surface of the telescopic rod (36) is sleeved and connected to the inner wall of the spring (33).

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