Improved structure of turntable

Abstract

The utility model discloses an improved structure of a turntable. The ball bearing comprises a plastic sliding seat, a plastic fixed seat and a metal ball, the plastic sliding seat is seated on the plastic fixed seat, the plastic sliding seat and the plastic fixed seat are connected to form a cavity for accommodating the metal ball, a first metal wear-resistant part is arranged at the bottom of the cavity, and the metal ball is in rolling contact with the bottom of the first metal wear-resistant part. The plastic fixing seat is in contact with the metal balls through the first metal wear-resistant part, so that the plastic fixing seat is prevented from being worn by the metal balls, the plastic fixing seat is not easy to damage, and the plastic sliding seat can normally rotate on the plastic fixing seat through the metal balls.

Description

Technical Field

[0001] This utility model relates to the field of rotating dining table equipment technology, specifically to an improved turntable structure for driving the table to rotate. Background Technology

[0002] Chinese patent CN212546131U discloses a self-rotating desktop turntable base, including a ring-shaped base with a rotatable ring-shaped cover. The ring-shaped base has a ring-shaped placement groove, within which ball bearings (steel balls) are placed. If the ring-shaped base and cover are made of metal, the manufacturing process is difficult, resulting in high overall cost and weight. If the ring-shaped base and cover are made of plastic, although the manufacturing difficulty and production cost are reduced, during use, the weight of the glass turntable and the dishes placed on it is applied to the ball bearings through the ring-shaped cover. The ball bearings will press indentations into the ring-shaped placement groove. When the depth of the indentation exceeds the vertical gap between the ring-shaped base and cover, the ring-shaped cover can no longer rotate relative to the ring-shaped base via the ball bearings. Utility Model Content

[0003] The purpose of this invention is to provide an improved turntable structure with a longer service life.

[0004] The purpose of this utility model is achieved as follows.

[0005] An improved turntable structure includes a plastic sliding seat, a plastic fixed seat, and a metal ball. The plastic sliding seat sits on the plastic fixed seat, and a cavity for accommodating the metal ball is formed between the plastic sliding seat and the plastic fixed seat. A first metal wear-resistant member is provided at the bottom of the cavity, and the first metal wear-resistant member makes rolling contact with the bottom of the metal ball.

[0006] The plastic fixing seat of this utility model contacts the metal ball bearing through the first metal wear-resistant part, which avoids the plastic fixing seat being worn by the metal ball bearing. The plastic fixing seat is not easily damaged and can ensure that the plastic sliding seat rotates normally on the plastic fixing seat through the metal ball bearing.

[0007] The above technical solution can be further improved as follows.

[0008] Furthermore, both the plastic sliding seat and the plastic fixed seat are annular, the cavity is annular, and the first metal wear-resistant part is an annular metal sheet.

[0009] The first type of metal wear-resistant component has a simple structure and is easy to manufacture. It can upgrade existing turntables without modifying existing turntable molds, reducing overall manufacturing costs and making it more competitive in the market.

[0010] Furthermore, the bottom of the plastic sliding seat is provided with an upper concave cavity, and the top of the plastic fixing seat is provided with a lower concave cavity. The upper and lower concave cavities are aligned vertically to form the cavity. The first metal wear-resistant part is placed in the lower concave cavity, and the top surface of the first metal wear-resistant part is lower than the top surface of the lower concave cavity.

[0011] The first metal wear-resistant component does not interfere with the limiting of the metal ball by the recessed cavity.

[0012] Furthermore, the bottom surface of the recessed cavity is provided with a first arc-shaped groove, and the first metal wear-resistant part is placed on the bottom surface of the recessed cavity and covers the first arc-shaped groove. The first metal wear-resistant part deforms during the rolling of the metal ball to fit the first arc-shaped groove.

[0013] After the first metal wear-resistant part deforms and fits into the first arc-shaped groove, the first metal wear-resistant part guides the rolling direction of the metal ball, making it less likely for the metal ball to wobble left or right.

[0014] Furthermore, the bottom surface of the concave cavity has a concave arc shape, and the corresponding first metal wear-resistant part has a concave arc shape. The first metal wear-resistant part is placed on the bottom surface of the concave cavity.

[0015] The first wear-resistant metal component guides the rolling direction of the metal balls, making it less likely for the metal balls to wobble to the left or right.

[0016] Furthermore, a second metal wear-resistant component is provided at the top of the cavity, and the second metal wear-resistant component makes rolling contact with the top of the metal ball.

[0017] The plastic slide seat contacts the metal ball bearings through a second wear-resistant metal part, preventing the plastic slide seat from being worn by the metal ball bearings. The plastic slide seat is not easily damaged, which helps to extend the product's service life.

[0018] Furthermore, the bottom of the plastic sliding seat is provided with an upper concave cavity, and the top of the plastic fixing seat is provided with a lower concave cavity. The upper and lower concave cavities are aligned vertically to form the cavity. The second metal wear-resistant part is placed in the upper concave cavity, and the bottom surface of the second metal wear-resistant part is higher than the bottom surface of the upper concave cavity.

[0019] The second metal wear-resistant part does not interfere with the upper concave cavity's positioning of the metal balls.

[0020] Furthermore, the top surface of the upper concave cavity is provided with a second arc-shaped groove, and the second metal wear-resistant part is placed in the upper concave cavity and covers the second arc-shaped groove. The second metal wear-resistant part deforms during the rolling of the metal ball to fit the second arc-shaped groove.

[0021] After the second metal wear-resistant part deforms and fits into the second arc-shaped groove, the second metal wear-resistant part guides the rolling direction of the metal ball, making it less likely for the metal ball to wobble left or right.

[0022] Furthermore, the top surface of the upper concave cavity has an upward concave arc shape, and the corresponding second metal wear-resistant part has an upward concave arc shape, with the second metal wear-resistant part and the top surface of the lower concave cavity abutting each other.

[0023] The second wear-resistant metal component guides the rolling direction of the metal balls, preventing them from easily swaying left or right.

[0024] Furthermore, the bottom of the plastic sliding seat is provided with an installation groove, and the bottom surface of the plastic sliding seat is provided with detachable limiting members on both sides of the installation groove. The limiting members extend into the installation groove. After the limiting members and the plastic sliding seat are connected, the cross section of the installation groove is inverted T-shaped, the cross section of the plastic fixing seat is T-shaped, the top of the plastic fixing seat is placed in the installation groove, and the limiting members restrict the plastic fixing seat to be located in the installation groove. There is an anti-friction gap between the plastic sliding seat and the plastic fixing seat, and the anti-friction gap is smaller than the diameter of the metal ball.

[0025] The plastic sliding base and plastic fixed base have a simple installation structure, are easy to assemble and disassemble, and have a detachable limit component design, which facilitates the mold opening and manufacturing of the plastic sliding base.

[0026] This utility model's plastic mounting base uses a first wear-resistant metal component to contact the metal balls, preventing wear on the plastic mounting base from the metal balls and making it less prone to damage. This ensures the plastic sliding seat rotates normally on the plastic mounting base via the metal balls. The plastic sliding seat also uses a second wear-resistant metal component to contact the metal balls, preventing wear on the plastic sliding seat and making it less prone to damage, thus helping to extend the product's lifespan. It does not significantly increase the overall manufacturing cost or weight. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the exploded structure of Example 1.

[0028] Figure 2 This is a cross-sectional structural diagram of Example 1.

[0029] Figure 3 for Figure 2 Enlarged schematic diagram of section A in the middle.

[0030] Figure 4 This is a partial cross-sectional structural diagram of Example 2.

[0031] Figure 5 This is a schematic diagram of the exploded structure of Example 3.

[0032] Figure 6 This is a cross-sectional structural diagram of Example 3.

[0033] Figure 7 for Figure 6 Enlarged schematic diagram of section B in the middle.

[0034] Figure 8 This is a partial cross-sectional structural diagram of Example 4. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0036] Example 1, see Figure 1-3 As shown, an improved turntable structure includes a plastic sliding seat 1, a plastic fixed seat 2, and metal balls 3. The plastic sliding seat 1 sits on the plastic fixed seat 2, and a cavity for accommodating the metal balls 3 is formed between the plastic sliding seat 1 and the plastic fixed seat 2. A push rod 4 is provided between adjacent metal balls 3.

[0037] Specifically, both the plastic sliding seat 1 and the plastic fixed seat 2 are annular in shape, and the cavity is also annular. The bottom of the plastic sliding seat 1 has a mounting groove 11. Removable limiting members 5 are provided on both sides of the mounting groove 11 on the bottom surface of the plastic sliding seat 1. The limiting members 5 extend into the mounting groove 11. After the limiting members 5 and the plastic sliding seat 1 are connected, the cross-section of the mounting groove 11 is inverted T-shaped, and the cross-section of the plastic fixed seat 2 is T-shaped. The top of the plastic fixed seat 2 is placed inside the mounting groove 11. The limiting members 5 prevent the plastic fixed seat 2 from detaching from the mounting groove 11. An anti-friction gap 6 is provided between the upper and lower parts of the plastic sliding seat 1 and the plastic fixed seat 2. The anti-friction gap 6 is smaller than the diameter of the metal ball 3. The plastic sliding seat 1 and the limiting members 5 are detachably connected by screws (not shown in the figure).

[0038] The bottom surface of the mounting groove 11 has an upper recessed cavity 12, and the top of the plastic fixing seat 2 has a lower recessed cavity 21. The upper recessed cavity 12 and the lower recessed cavity 21 are aligned vertically to form the cavity. A first metal wear-resistant component 7 is provided at the bottom of the cavity, that is, the first metal wear-resistant component 7 is placed in the lower recessed cavity 21, and the top surface of the first metal wear-resistant component 7 is lower than the top surface of the lower recessed cavity 21. The metal ball 3 rolls in contact with the bottom of the first metal wear-resistant component 7. The first metal wear-resistant component 7 is a ring-shaped metal sheet. Preferably, the first metal wear-resistant component 7 is an iron sheet. The anti-friction gap 6 is left between the upper recessed cavity 12 and the lower recessed cavity 21.

[0039] The plastic sliding seat 1 rolls on the first metal wear-resistant part 7 in the lower cavity 21 via the metal ball 3. Since the rolling wear of the metal ball 3 and the first metal wear-resistant part 7 is small, the overall service life is extended.

[0040] Example 2, see Figure 4 As shown, the difference from Embodiment 1 is that the bottom surface of the recessed cavity 21 is provided with a first arc-shaped groove 22. The first metal wear-resistant part 7 is placed on the bottom surface of the recessed cavity 21 and covers the first arc-shaped groove 22. The first metal wear-resistant part 7 is flat and deforms to fit the first arc-shaped groove 22 during the rolling of the metal ball 3. The metal ball 3 is guided to roll through the first arc-shaped groove 22, and the two sides of the metal ball 3 will not contact the recessed cavity 21, reducing friction and making the rotation of the plastic sliding seat 1 smoother.

[0041] Of course, as another structure, the bottom surface of the recessed cavity 21 can also be made into a concave arc shape, and the first metal wear-resistant part 7 is stamped to make the cross-section into a concave arc shape. The first metal wear-resistant part 7 is placed on the bottom surface of the recessed cavity 21, and the arc-shaped structure of the first metal wear-resistant part 7 can also guide the metal ball 3 to roll.

[0042] Example 3, see Figure 5-7 As shown, the difference from Embodiment 1 is that a second metal wear-resistant component 8 is provided at the top of the cavity. The second metal wear-resistant component 8 is placed inside the upper concave cavity 12, with its bottom surface higher than the bottom surface of the upper concave cavity 12. The metal ball 3 rolls in contact with the second metal wear-resistant component 8. In this way, the plastic sliding seat 1 does not directly contact the metal ball 3, and the plastic sliding seat 1 is less prone to wear and damage, further extending the overall service life. The second metal wear-resistant component 8 is a ring-shaped metal sheet. Preferably, the second metal wear-resistant component 8 is an iron sheet.

[0043] Example 4, see Figure 8 As shown, the difference from Embodiment 3 is that the bottom surface of the lower concave cavity 21 is provided with a first arc-shaped groove 22, and the top surface of the upper concave cavity 12 is provided with a second arc-shaped groove 13. A first metal wear-resistant component 7 is placed on the bottom surface of the lower concave cavity 21 and blocks the first arc-shaped groove 22. The first metal wear-resistant component 7 deforms during the rolling of the metal ball 3 to conform to the first arc-shaped groove 22. A second metal wear-resistant component 8 is placed in the upper concave cavity 12 and blocks the second arc-shaped groove 13. The second metal wear-resistant component 8 deforms during the rolling of the metal ball 3 to conform to the second arc-shaped groove 13. The metal ball 3 is guided to roll through the first arc-shaped groove 22 and the second arc-shaped groove 13. The sides of the metal ball 3 do not contact the lower concave cavity 21 and the upper concave cavity 12, reducing friction and making the rotation of the plastic sliding seat 1 smoother.

[0044] Of course, as another structure, the bottom surface of the concave cavity 21 can also be concave arc-shaped. The first metal wear-resistant part 7 is stamped to have a concave arc-shaped cross-section and is placed on the bottom surface of the concave cavity 21. The top surface of the upper concave cavity 12 has an upward concave arc-shaped cross-section, and the corresponding second metal wear-resistant part 8 has an upward concave arc-shaped cross-section. The second metal wear-resistant part 8 and the top surface of the concave cavity 21 abut against each other. The arc-shaped structure of the first metal wear-resistant part 7 and the second metal wear-resistant part 8 can also guide the metal ball 3 to roll.

[0045] The terms used in this utility model, such as "first," "second," etc., do not indicate any order, quantity, or importance, but are only used for distinction.

[0046] In this invention, terms such as "a" or "an" are used to indicate not a limitation on the quantity, but rather to indicate the existence of at least one of the mentioned objects.

[0047] In this utility model, terms indicating direction or location such as front end, rear end, top, bottom, side, longitudinal, transverse, middle, center, outside, inside, horizontal, vertical, left, right, above, below, etc., are used to indicate relative positions rather than absolute positions.

[0048] Terms used in this invention, such as "approximately," "generally," "approximately," and "similar," are limiting terms used to indicate features that exist but allow for certain deviations. The amount of deviation allowed may vary depending on the specific context.

Claims

1. An improved turntable structure, comprising a plastic sliding seat, a plastic fixed seat, and metal balls, wherein the plastic sliding seat sits on the plastic fixed seat, and a cavity for accommodating the metal balls is formed between the plastic sliding seat and the plastic fixed seat, characterized in that, The bottom of the cavity is provided with a first metal wear-resistant component, which makes rolling contact with the bottom of the metal ball.

2. The improved turntable structure according to claim 1, characterized in that, Both the plastic sliding seat and the plastic fixed seat are annular in shape, the cavity is annular in shape, and the first metal wear-resistant part is an annular metal sheet.

3. The improved turntable structure according to claim 1, characterized in that, The bottom of the plastic sliding seat has an upper concave cavity, and the top of the plastic fixing seat has a lower concave cavity. The upper and lower concave cavities are aligned vertically to form the cavity. The first metal wear-resistant part is placed in the lower concave cavity, and the top surface of the first metal wear-resistant part is lower than the top surface of the lower concave cavity.

4. The improved turntable structure according to claim 3, characterized in that, The bottom surface of the recessed cavity is provided with a first arc-shaped groove. A first metal wear-resistant part is placed on the bottom surface of the recessed cavity and covers the first arc-shaped groove. The first metal wear-resistant part deforms during the rolling of the metal ball to fit the first arc-shaped groove.

5. The improved turntable structure according to claim 3, characterized in that, The bottom surface of the concave cavity has a concave arc shape, and the corresponding first metal wear-resistant part has a concave arc shape. The first metal wear-resistant part is placed on the bottom surface of the concave cavity.

6. The improved turntable structure according to claim 1, characterized in that, The top of the cavity is provided with a second metal wear-resistant component, which makes rolling contact with the top of the metal ball.

7. The improved turntable structure according to claim 6, characterized in that, The plastic sliding seat has an upper concave cavity at the bottom and a lower concave cavity at the top of the plastic fixing seat. The upper and lower concave cavities are aligned vertically to form the cavity. The second metal wear-resistant part is placed in the upper concave cavity, and the bottom surface of the second metal wear-resistant part is higher than the bottom surface of the upper concave cavity.

8. The improved turntable structure according to claim 3, characterized in that, The upper concave cavity has a second arc-shaped groove on its top surface. The second metal wear-resistant part is placed in the upper concave cavity and covers the second arc-shaped groove. The second metal wear-resistant part deforms during the rolling of the metal ball to fit the second arc-shaped groove.

9. The improved turntable structure according to claim 3, characterized in that, The top surface of the upper concave cavity has an upward concave arc shape, and the corresponding second metal wear-resistant part has an upward concave arc shape. The second metal wear-resistant part and the top surface of the lower concave cavity abut against each other.

10. The improved turntable structure according to claim 1, characterized in that, The bottom of the plastic sliding seat is provided with an installation groove. The bottom surface of the plastic sliding seat has detachable limiting members on both sides of the installation groove. The limiting members extend into the installation groove. After the limiting members and the plastic sliding seat are connected, the cross section of the installation groove is inverted T-shaped, the cross section of the plastic fixed seat is T-shaped, the top of the plastic fixed seat is placed in the installation groove, and the limiting members restrict the plastic fixed seat to be located in the installation groove. There is an anti-friction gap between the plastic sliding seat and the plastic fixed seat, which is smaller than the diameter of the metal ball.

Images