Large-torque high-precision constant-temperature rotary table motor

Abstract

The utility model discloses a large-torque high-precision constant-temperature rotary table motor which comprises a shell, the shell comprises a bottom shell and a sealing cover which are both of an annular structure, an annular boss dividing the interior of the bottom shell into a first containing cavity and a second containing cavity is arranged in the bottom shell, a first bearing is fixedly arranged in the first containing cavity, and a second bearing is fixedly arranged in the second containing cavity. A second bearing is fixedly arranged in the second containing cavity, a circulating cooling water way is arranged on the annular boss, and the sealing cover is arranged on the bottom shell through the first bearing and the second bearing in a covering mode. According to the utility model, the problem of insufficient precision of a rotary table motor in the prior art can be solved, the temperature in the shell can be rapidly reduced, the yield of products is improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a high-torque and high-precision constant-temperature turntable motor. Background Art

[0002] The existing large-format direct-drive turntable is mostly a group of turntable bearings. This structural design is difficult to ensure the rotation accuracy when in use. In addition, because the large-format direct-drive turntable is used in various occasions, such as environments with relatively high moisture content (water spray processing) and environments with relatively high dust content (grinding processing produces a large amount of fine dust), it is difficult to completely seal the inside of the turntable. After a period of use, the inside of the turntable is easily contaminated, which affects the performance of the turntable and reduces its service life. At the same time, because the inside of the turntable is easily contaminated, an encoder to improve the accuracy cannot be installed inside the turntable, making it difficult to control the angle of rotation. Because the direct-drive turntable is a production equipment that needs to be used for a long time, the heat generated inside it after long-term operation can easily cause the internal parts to expand and contract, which will also have a certain impact on the accuracy of the turntable. Existing direct-drive turntables mostly use external equipment to cool the outside of the turntable. This type of heat dissipation method makes it difficult to quickly reduce the temperature inside the turntable. In summary, the yield rate of products processed using this type of turntable is not high, which increases the production cost. Utility Model Content

[0003] The utility model aims to solve the technical problems existing in the background technology and propose a high-torque and high-precision constant-temperature turntable motor.

[0004] According to the utility model, a large torque and high precision constant temperature turntable motor is provided, comprising: a shell, the shell comprising a bottom shell and a cover, both of which are annular structures, the bottom shell is provided with an annular boss which divides the inside of the bottom shell into a first accommodating cavity and a second accommodating cavity, the first accommodating cavity is fixed with a first bearing, the second accommodating cavity is fixed with a second bearing, the annular boss is provided with a circulating cooling water circuit, and the cover is arranged on the bottom shell through the first bearing and the second bearing cover.

[0005] Preferably, a motor power system is provided between the first bearing and the annular boss, and between the second bearing and the annular boss.

[0006] Preferably, a first mounting groove is provided at a position of the bottom of the cover corresponding to the second bearing, a first sealing ring is provided in the first mounting groove, and a cover plate covering the annular boss is provided at a position of the bottom of the cover corresponding to the annular boss.

[0007] Preferably, the circulating cooling water circuit includes an annular groove, a water inlet, a water outlet, a first channel and a second channel. The annular groove is arranged at the top of the annular boss and is perpendicular to the bottom of the bottom shell. The water inlet and the water outlet are arranged on the side wall of the bottom shell. The first channel and the second channel are arranged in the annular groove. The first channel and the second channel are connected to the water inlet and the water outlet respectively. A blocking column is also provided at the bottom of the annular groove between the first channel and the second channel.

[0008] Preferably, second mounting grooves are provided on both sides of the opening of the annular groove, and second sealing rings are provided in the two mounting grooves.

[0009] Preferably, a clean positive pressure system is provided on the shell, and the clean positive pressure system includes an air inlet, a plurality of air cavities and a third sealing ring. The air inlet is provided on the side wall of the bottom shell and is connected to the interior of the bottom shell. The air cavity is provided in the first accommodating cavity, and the third sealing ring is provided on the bottom outer wall of the cover.

[0010] Preferably, the pressure of the air inlet is between 0.1-0.15 MPa.

[0011] Preferably, a peripheral pressure plate is fixedly provided on the cover at the periphery of the second sealing ring.

[0012] Preferably, an annular encoder is provided at the bottom of the bottom shell, and a fourth sealing ring is provided between the second bearing and the annular encoder.

[0013] Compared with the prior art, the utility model has the following beneficial technical effects: the interior of the shell is divided into a first accommodating cavity and a second accommodating cavity by an annular boss, a first bearing of a large size is fixed in the first accommodating cavity, and a second bearing of a small size is fixed in the second accommodating cavity, so that the centrifugal forces of the first bearing and the second bearing can offset each other during operation, so that the turntable motor has higher precision when rotating, and a circulating cooling water path is arranged on the annular boss, which can simultaneously take away the heat from the heat sources on both sides of the annular boss, so that the temperature inside the shell can be quickly reduced. At the same time, because the first bearing and the second bearing are on the same horizontal plane, the strength of the turntable motor is stronger than that of the existing single-bearing turntable motor. At the same time, a clean positive pressure system is arranged on the shell to make the air pressure in the shell positive pressure, so that water vapor or dust outside the shell cannot enter the shell through the gap, thereby extending the service life of the turntable motor. In summary, the structure can solve the problem of insufficient precision of the turntable motor in the prior art, can quickly reduce the temperature inside the shell, improve the product yield, and reduce the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the internal three-dimensional structure of the bottom shell of a high-torque and high-precision constant-temperature turntable motor in one embodiment;

[0015] Figure 2 for Figure 1 A schematic diagram of the structure from a top view in an embodiment;

[0016] Figure 3 for Figure 1 A schematic diagram of the three-dimensional structure after the first bearing, the second bearing and the motor power system are installed in the embodiment;

[0017] Figure 4 for Figure 1 A schematic diagram of a top view of the first bearing, the second bearing and the motor power system in the embodiment;

[0018] Figure 5 for Figure 1 A schematic diagram of the overall three-dimensional structure in the embodiment;

[0019] Figure 6 for Figure 1 A schematic diagram of the overall bottom structure in the embodiment;

[0020] Figure 7 for Figure 1 A schematic diagram of the structure of the second bearing and the annular encoder in the embodiment;

[0021] Figure 8 for Figure 5 A schematic diagram of the structure of the cover from an exploded perspective in the illustrated embodiment;

[0022] The component numbers and names in the figures are uniformly described as follows: 1-shell, 10-bottom shell, 100-annular boss, 101-first accommodating cavity, 102-second accommodating cavity, 11-cover, 110-first mounting groove, 111-first sealing ring, 112-cover plate, 2-first bearing, 3-second bearing, 4-motor power system, 50-annular operation, 51-water inlet, 52-water outlet, 53-first channel, 54-second channel, 55-blocking column, 56-second mounting groove, 57-second sealing ring, 60-air inlet, 61-air cavity, 62-third sealing ring, 63-outer pressure plate, 70-annular encoder, 71-fourth sealing ring. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0024] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or a specific connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0026] The specific embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0027] like Figure 1-Figure 8As shown, a high-torque, high-precision, constant-temperature turntable motor proposed by the utility model comprises: a shell 1, which can protect the internal structure of the turntable motor to prevent the debris of the parts from falling into the turntable motor and damaging its internal structure when processing the parts. The shell 1 comprises a bottom shell 10 and a cover 11, both of which are annular structures. The annular structure facilitates the installation of the turntable motor on the processing machine. The layered design facilitates the disassembly and assembly of the turntable motor, and if the internal parts of the turntable motor are damaged, they can also be quickly replaced. The bottom shell 10 is provided with a first The annular boss 100 of the accommodating cavity 101 and the second accommodating cavity 102, the first accommodating cavity 101 is fixedly provided with a first bearing 2, the second accommodating cavity 102 is fixedly provided with a second bearing 3, the size of the first bearing 2 is larger than the size of the second bearing 3, the annular boss 100 of the first bearing 2 divides the internal space of the housing 1 into two, so that the first bearing 2 and the second bearing 3 will not be affected by each other, the design of the two bearings not only improves the strength of the turntable motor, so that it is not easy to be damaged when encountering a heavy part to be processed, at the same time, because the first bearing 2 and the second bearing 3 are in the process The centrifugal forces generated during operation can offset each other, so the mechanical accuracy of the turntable motor can be improved. A circulating cooling water circuit is provided on the annular boss 100. When the turntable motor is finished working, the first bearing 2 and the second bearing 3 will generate heat, and the heat generated is many times the heat generated by the single-bearing turntable motor. Therefore, the traditional cooling method cannot meet the heat dissipation requirements of the turntable motor. Therefore, the annular boss 100 is arranged inside the housing 1 and is located between the first bearing 2 and the second bearing 3. This structure allows the circulating cooling water circuit on the annular boss 100 to simultaneously cool the first accommodating cavity The first bearing 2 in 101 and the second bearing 3 in the second accommodating cavity 102 dissipate heat, thereby solving the problem that the existing heat dissipation structure cannot quickly reduce the temperature inside the turntable motor, improving the product yield rate and reducing the production cost. The cover 11 is arranged on the bottom shell 10 through the first bearing 2 and the second bearing 3. The outer wall of the first bearing 2 in the turntable motor and the outer wall of the second bearing 3 are fixedly connected to the bottom shell 10, and the inner wall of the first bearing 2 and the inner wall of the second bearing 3 are fixedly connected to the cover 11. This structure further enhances the mechanical precision of the turntable motor.

[0028] In one embodiment, a motor power system 4 is provided between the first bearing 2 and the annular boss 100 and between the second bearing 3 and the annular boss 100. The motor power system 4 has the same structure as the power system of the motor in the prior art and is the main structure for driving the first bearing 2 and the second bearing 3 to rotate. Therefore, it is also the main heat source of the turntable motor. The circulating cooling water circuit provided on the annular boss 100 can dissipate heat from the two heat sources at the same time.

[0029] In one embodiment, a first mounting groove 110 is provided at the bottom of the cover 11 corresponding to the position of the second bearing 3, a first sealing ring 111 is provided in the first mounting groove 110, and a cover plate 112 covering the annular boss 100 is provided at the bottom of the cover 11 corresponding to the position of the annular boss 100. Because there is a gap between the cover 11 and the second bearing 3, the first sealing ring 111 is located at the bottom of the cover 11 close to the hollow part of the cover 11. The first sealing ring 111 can fill the gap between the cover 11 and the second bearing 3 to prevent water vapor or dust from entering the interior of the housing 1 and causing damage to the turntable motor, thereby improving the service life of the turntable motor. The setting of the cover plate 112 can prevent the cooling water in the circulating cooling water circuit from flowing from the circulating cooling water circuit into the motor power system 4 on both sides of the annular boss 100, thereby avoiding the problem of cooling water causing a short circuit in the turntable motor.

[0030] In one embodiment, the circulating cooling water circuit includes an annular groove 50, a water inlet 51, a water outlet 52, a first channel 53 and a second channel 54. The annular groove 50 is arranged at the top of the annular boss 100 and is perpendicular to the bottom of the bottom shell 10. The water inlet 51 and the water outlet 52 are arranged on the side wall of the bottom shell 10. The first channel 53 and the second channel 54 are arranged in the annular groove 50. The first channel 53 and the second channel 54 are correspondingly connected to the water inlet 51 and the water outlet 52. The water inlet 51 is connected to the water outlet 52 of the external ice machine equipment. The cooling water in the ice machine equipment enters the first channel 53 from the water inlet 51, and then enters the annular In the groove 50, at this time, in order to prevent the cooling water from staying in the annular groove 50 for too short a time and failing to achieve effective heat dissipation, a blocking column 55 is provided at the bottom of the annular groove 50 between the first channel 53 and the second channel 54. The blocking column 55 completely separates the first channel 53 and the second channel 54, and the cooling water entering the annular groove 50 flows in a single direction. When the cooling water moves along one direction to the second channel 54, it enters the water outlet 52 from the second channel 54, and the water outlet 52 is connected to the water inlet 51 of the ice machine equipment. The cooling water carrying heat can be quickly cooled in the ice machine equipment, forming a complete circulating cooling water circuit.

[0031] It should be noted that the first channel 53 and the second channel 54 are both arranged adjacent to the blocking column 55 , so that the cooling water can be ensured to contact the entire area of ​​the inner wall of the annular groove 50 to the greatest extent.

[0032] In one embodiment, in order to further ensure that cooling water does not flow into the motor power system 4 on both sides of the annular boss 100 , second mounting grooves 56 are provided on both sides of the opening of the annular groove 50 , and second sealing rings 57 are provided in the two second mounting grooves 56 .

[0033] In one embodiment, in order to enhance the waterproof and dustproof effect of the turntable motor, a clean positive pressure system is provided on the shell 1, and the clean positive pressure system includes an air inlet 60, a plurality of air cavities 61 and a third sealing ring 62. The air inlet 60 is provided on the side wall of the bottom shell 10 and is communicated with the inside of the bottom shell 10, the air cavity 61 is provided in the first accommodating cavity 101, and the third sealing ring 62 is provided on the bottom outer wall of the cover 11. The third sealing ring 62 makes the interior of the shell 1 relatively sealed. At this time, gas is injected from the air inlet 60, and the gas enters the first accommodating cavity 101 and is retained in the air cavity 61, so that a space with positive air pressure is formed inside the shell 1. At this time, the air pressure outside the turntable motor is negative, so that water vapor and dust outside the turntable motor cannot enter the inside of the shell 1 at all, so as to achieve the effect of completely clean inside the turntable motor.

[0034] It should be noted that the pressure of the air inlet 60 is between 0.1-0.15 MPa.

[0035] In one embodiment, in order to prevent the third sealing ring 62 from deforming during the high-speed selection of the turntable motor and affecting the sealing effect, a circle of peripheral pressure plates 63 are fixedly provided on the cover 11 at the periphery of the third sealing ring 62 .

[0036] It should be noted that the third sealing ring 62 is in a bowl shape.

[0037] In one embodiment, in order to enhance the indexing progress of the turntable motor and better control the rotation angle, an annular encoder 70 is provided at the bottom of the bottom shell 10 , and a fourth sealing ring 71 is provided between the second bearing 3 and the annular encoder 70 .

[0038] The above is a large torque high precision constant temperature turntable motor or multiple implementations provided in combination with specific content, and it is not considered that the specific implementation of the utility model is limited to these descriptions. Any method, structure, etc. similar to or identical to the utility model, or a number of technical deductions or replacements based on the concept of the utility model, should be regarded as the protection scope of the utility model.

Claims

1. A high-torque, high-precision, constant-temperature turntable motor, comprising: A shell (1), characterized in that the shell (1) comprises a bottom shell (10) and a cover (11), both of which are annular structures; an annular boss (100) is provided in the bottom shell (10) for dividing the inside of the bottom shell into a first accommodating cavity (101) and a second accommodating cavity (102); a first bearing (2) is fixedly provided in the first accommodating cavity (101); a second bearing (3) is fixedly provided in the second accommodating cavity (102); a circulating cooling water circuit is provided on the annular boss (100); and the cover (11) is arranged on the bottom shell (10) through the first bearing (2) and the second bearing (3).

2. The high-torque, high-precision constant-temperature turntable motor according to claim 1, characterized in that: A motor power system (4) is provided between the first bearing (2) and the annular boss (100), and between the second bearing (3) and the annular boss (100).

3. The high-torque, high-precision constant-temperature turntable motor according to claim 2, characterized in that: A first mounting groove (110) is provided at a position of the bottom of the cover (11) corresponding to the second bearing (3), a first sealing ring (111) is provided in the first mounting groove (110), and a cover plate (112) covering the annular boss (100) is provided at a position of the bottom of the cover (11) corresponding to the annular boss (100).

4. The high-torque, high-precision constant-temperature turntable motor according to claim 3 is characterized in that: The circulating cooling water circuit comprises an annular groove (50), a water inlet (51), a water outlet (52), a first channel (53) and a second channel (54); the annular groove (50) is arranged at the top of the annular boss (100) and is perpendicular to the bottom of the bottom shell (10); the water inlet (51) and the water outlet (52) are arranged on the side wall of the bottom shell (10); the first channel (53) and the second channel (54) are arranged in the annular groove (50); the first channel (53) and the second channel (54) are connected to the water inlet (51) and the water outlet (52) respectively; and a blocking column (55) is also arranged at the bottom of the annular groove (50) between the first channel (53) and the second channel (54).

5. The high-torque, high-precision constant-temperature turntable motor according to claim 4, characterized in that: Second installation grooves (56) are provided on both sides of the opening of the annular groove (50), and second sealing rings (57) are provided in the two second installation grooves (56).

6. The high-torque, high-precision constant-temperature turntable motor according to claim 5, characterized in that: The shell (1) is provided with a clean positive pressure system, which comprises an air inlet (60), a plurality of air cavities (61) and a third sealing ring (62); the air inlet (60) is provided on the side wall of the bottom shell (10) and is communicated with the inside of the bottom shell (10); the air cavity (61) is provided in the first accommodating cavity (101); and the third sealing ring (62) is provided on the bottom outer wall of the cover (11).

7. The high-torque, high-precision constant-temperature turntable motor according to claim 6, characterized in that: The pressure of the air inlet (60) is between 0.1 and 0.15 MPa.

8. The high-torque, high-precision constant-temperature turntable motor according to claim 7, characterized in that: A circle of peripheral pressure plates (63) is fixedly provided on the sealing cover (11) at the periphery of the third sealing ring (62).

9. The high-torque, high-precision constant-temperature turntable motor according to claim 8, characterized in that: An annular encoder (70) is provided at the bottom of the bottom shell (10), and a fourth sealing ring (71) is provided between the second bearing (3) and the annular encoder (70).

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