Motor direct drive turntable and brake pad for motor direct drive turntable

Abstract

The utility model discloses a motor direct drive rotary table and brake pad for motor direct drive rotary table, brake pad includes a plurality of fixed brake disc of coaxial interval arrangement and the brake disc of following motion between any adjacent 2 fixed brake disc, and fixed brake disc is divided into brake inner ring, deformation ring and fixed outer ring from the circle center to the circumferential outside in proper order, and the brake disc of following motion is divided into fixed inner ring and brake outer ring from the circle center to the circumferential outside in proper order, brake outer ring is opposite with brake inner ring and has brake gap between both, and sets up a plurality of deformation grooves at deformation ring, and a plurality of deformation grooves are arranged in the circle center interval of fixed brake disc. The deformation groove can reduce the rigid strength of deformation ring and make deformation ring more easily occur elastic deformation, reduce the size of brake outer force exerted to the brake inner ring of fixed brake disc, reach the brake effect of more fast, greater brake force, let brake pad provide fast and reliable brake stop ability when being applicable to heavy load and large torque working condition in motor direct drive rotary table.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a direct-drive turntable and a brake pad for the direct-drive turntable. Background Technology

[0002] A direct-drive motor rotary table is a type of CNC machine tool rotary table. Its transmission mechanism has no mechanical wear, allowing it to maintain high precision and high responsiveness for extended periods. However, since the direct-drive method lacks the self-locking force of mechanical friction, an additional braking device is required. During machine tool manufacturing, transportation, power outages, and when locking the rotary table for angled machining, the rotating shaft needs to be stopped by the braking device to prevent rotation. Existing braking devices used in direct-drive motor rotary tables, due to the high rigidity of the brake discs, result in relatively small deformation of the brake discs under the same pressure from hydraulic fluid or gas. This leads to a relatively small braking force, which is insufficient to provide greater braking force for the motor rotary table under heavy loads and high torque conditions, thus failing to achieve satisfactory braking performance. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art, and proposes a motor direct drive turntable and a brake pad for the motor direct drive turntable. The brake pad is more easily deformable, thereby providing greater braking force to meet the braking requirements of the motor direct drive turntable under heavy load and high torque conditions.

[0004] This utility model proposes a brake pad for a motor-driven turntable, comprising multiple fixed brake discs arranged coaxially at intervals and a follower brake disc located between any two adjacent fixed brake discs. The fixed brake discs are divided into an inner braking ring, a deformation ring, and a fixed outer ring from the center to the outer circumference. The follower brake discs are also divided into a fixed inner ring and a braking outer ring from the center to the outer circumference. The braking outer ring and the braking inner ring are arranged opposite each other and have a braking gap between them. Several deformation grooves are provided in the deformation ring, and the deformation grooves are arranged at intervals around the center of the fixed brake discs.

[0005] In some preferred embodiments, a plurality of deformation grooves are arranged in a circle around the center of the fixed brake disc.

[0006] In some preferred embodiments, the deformation groove includes a plurality of first deformation grooves and a plurality of second deformation grooves. The plurality of first deformation grooves are arranged in a first circle around the center of the fixed brake disc, and the plurality of second deformation grooves are arranged in a second circle around the center of the fixed brake disc. The inner diameter R1 of the brake inner ring is less than the radius R2 of the first circle and less than the radius R3 of the second circle.

[0007] In some preferred embodiments, the inner diameter R4 of the outer brake ring is equal to the inner diameter R1 of the inner brake ring, the outer diameter R5 of the outer brake ring is greater than the inner diameter R1 of the inner brake ring, and the inner diameter R6 of the fixed inner ring is less than the inner diameter R1 of the inner brake ring.

[0008] In some preferred embodiments, the brake pads further include an outer washer, which is fixed between the outer rings of two adjacent fixed brake discs.

[0009] In some preferred embodiments, the number of fixed brake discs is more than two, and a follower brake disc is provided between any two adjacent fixed brake discs.

[0010] In some preferred embodiments, the brake pads further include an inner gasket, which is fixed between the fixed inner rings of two adjacent follower brake discs.

[0011] This utility model also discloses a direct-drive turntable, including a fixed turntable part, a rotating turntable part, and a brake cavity formed between the fixed turntable part and the rotating turntable part; the brake pads are provided in the brake cavity, the fixed brake disc is fixedly connected to the fixed turntable part, and the follower brake disc is fixedly connected to the rotating turntable part.

[0012] In some preferred embodiments, a brake block and a spring connected to the upper end of the brake block are also provided in the brake chamber, and the upper and lower end surfaces of the brake block are respectively provided with flow channels.

[0013] In some preferred embodiments, a seal is provided between the brake block and the inner wall of the brake chamber.

[0014] This invention provides several deformation grooves arranged at intervals around the center of the fixed brake disc in the deformation ring. These grooves reduce the rigidity of the deformation ring, making it easier for the ring to undergo elastic deformation. Compared with existing technologies, this invention offers at least the following technical advantages:

[0015] 1. Since the deformation ring is more prone to elastic deformation, under the condition that the inner brake ring and the outer brake ring form an abutting fit to generate the same braking force, this application can reduce the magnitude of the braking force applied to the inner brake ring of the fixed brake disc compared with the prior art.

[0016] 2. When the same braking force is applied to the inner brake ring of the fixed brake disc, the deformation ring is more prone to elastic deformation. This not only shortens the braking time for the inner brake ring and outer brake ring to eliminate the braking gap and form a mating fit, but also makes the mating between the inner brake ring and outer brake ring tighter, generating greater braking force. This results in faster braking and greater braking force, allowing the brake pads to provide quick and reliable stopping capability when the motor-driven turntable is suitable for heavy load and high torque conditions. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the brake pad disclosed in this application.

[0018] Figure 2 yes Figure 1 A schematic diagram of a partial AA cross-sectional structure.

[0019] Figure 3 This is an exploded structural diagram of the brake pad disclosed in this application.

[0020] Figure 4 This is a schematic diagram of the structure of a fixed brake disc.

[0021] Figure 5 This is a partial internal structure diagram of one embodiment of a direct-drive turntable.

[0022] The labels in the diagram have the following meanings: 100, brake pad; 1, fixed brake disc; 101, fixed outer ring; 102, brake inner ring; 103, deformation ring; 109, first fixing hole; 11, first deformation groove; 12, second deformation groove; 2, follow-up brake disc; 21, fixed inner ring; 22, brake outer ring; 23, second fixing hole; 3, outer gasket; 4, inner gasket; 5, brake clearance; 61, fixed part of turntable; 62, rotating part of turntable; 63, brake chamber; 64, brake block; 641, flow channel; 65, spring; 66, seal. Detailed Implementation

[0023] To further illustrate the technical means and effects adopted by this application to achieve its intended purpose, the specific implementation methods, structures, features, and effects according to this application are described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0024] This application discloses a brake pad for a direct-drive turntable, which makes the brake pad more easily deformable during braking, thereby providing greater braking force to meet the braking requirements of the direct-drive turntable under heavy load and high torque conditions.

[0025] Combination Figures 1-4 As shown, the brake pad 100 specifically includes a plurality of fixed brake discs 1 arranged coaxially at intervals and a follower brake disc 2 located between any two adjacent fixed brake discs 1, with a braking gap 5 between the follower brake disc 2 and the two adjacent fixed brake discs 1.

[0026] When brake pad 100 is applied to a motor-driven turntable, the fixed brake disc 1 is fixedly connected to the fixed part of the turntable, while the follower brake disc 2 is fixedly connected to the rotating part of the turntable. The braking gap 5 ensures that the fixed brake disc 1 does not interfere with the rotation of the follower brake disc 2 as the turntable rotates. When it is necessary to stop the motor-driven turntable, an external braking force is applied to the fixed brake disc 1. The fixed brake disc 1 undergoes elastic deformation, causing the braking gap 5 to disappear. Two adjacent fixed brake discs 1 then clamp the follower brake disc 2 from their opposing surfaces. The large contact area between them generates a significant frictional force instantaneously, thus quickly stopping the rotation of the turntable.

[0027] Both the fixed brake disc 1 and the follower brake disc 2 are disc structures. The fixed brake disc 1 is divided into an inner braking ring 102, a deformation ring 103, and a fixed outer ring 101 from the center to the outer circumference. Specifically, the annular region near the center of the fixed brake disc 1 is the inner braking ring 102, the annular region near the outer circumference is the outer fixed ring 101, and the annular region between the outer fixed ring 101 and the inner braking ring 102 is the deformation ring 103. Figure 4 As shown, the dashed circles a and b are only for the purpose of understanding the division of the inner brake ring 102, deformation ring 103 and fixed outer ring 101 on the fixed brake disc 1. The dashed circles a and b are not actual lines or structures on the fixed brake disc 1.

[0028] The fixed brake disc 1 is fixedly connected to the rotating part of the turntable by the fixed outer ring 101. The brake inner ring 102 is used to form a braking engagement with the brake outer ring 22 of the follower brake disc 2. The deformation ring 103 is used to generate elastic deformation of the fixed brake disc 1 when it is subjected to braking force so that the brake inner ring 102 can move relative to the brake outer ring 22 of the follower brake disc 2.

[0029] The follow-up brake disc 2 is divided into a fixed inner ring 21 and a braking outer ring 22 from the center to the outer edge of the circumference. That is, the annular area near the center of the follow-up brake disc 2 is the fixed inner ring 21, while the annular area on the surface of the follow-up brake disc 2 located outside the fixed inner ring 21 is the braking outer ring 22. Figure 3 As shown. The dashed circle c is only for the convenience of understanding the division of the inner fixed ring 21 and the outer braking ring 22 on the surface of the follower brake disc 2. The dashed circle c is not a line or structure that actually exists on the surface of the follower brake disc 2.

[0030] The inner ring 21 of the follow-up brake disc 2 is mainly used to fix the follow-up brake disc 2 to the rotating part of the turntable, while the outer ring 22 of the follow-up brake disc 2 is used to form a braking engagement with the inner ring 102 of the fixed brake disc 1.

[0031] When the fixed brake disc 1 and the follower brake disc 2 are coaxially assembled, the center of the fixed brake disc 1 and the center of the follower brake disc 2 overlap and are located on the same axis. The outer brake ring 22 of the follower brake disc 2 and the inner brake ring 102 of the fixed brake disc 1 are directly opposite each other. When a braking force is applied to the inner brake ring 102 of the fixed brake disc 1, the deformation ring 103 undergoes elastic deformation under the braking force, causing the inner brake ring 102 to move toward the outer brake ring 22 of the follower brake disc 2, so that the braking gap 5 between the inner brake ring 102 and the outer brake ring 22 disappears, and the inner brake ring 102 and the outer brake ring 22 form an abutment to achieve the braking function.

[0032] A plurality of deformation grooves are provided on the deformation ring 103 of the fixed brake disc 1, and the plurality of deformation grooves are arranged at intervals around the center of the fixed brake disc 1. The deformation grooves can be blind holes or through holes. The deformation groove in the deformation ring 103 is designed to reduce the rigidity of the deformation ring 103, making it easier for the deformation ring 103 to undergo elastic deformation. This results in the following technical effects: First, because the deformation ring 103 is more prone to elastic deformation, under the condition that the inner brake ring 102 and the outer brake ring 22 form an abutting fit to generate the same braking force, this application can reduce the magnitude of the braking force applied to the inner brake ring 102 of the fixed brake disc 1 compared to the prior art. Second, under the condition that the braking force applied to the inner brake ring 102 of the fixed brake disc 1 is the same, because the deformation ring 103 is more prone to elastic deformation, it can not only shorten the braking time for the inner brake ring 102 and the outer brake ring 22 to eliminate the braking gap 5 and form an abutting fit, but also make the abutting between the inner brake ring 102 and the outer brake ring 22 tighter to generate a greater braking force, thereby achieving a faster braking and greater braking force, allowing the brake pad 100 to provide a quick and reliable braking capability when the motor direct-drive turntable is suitable for heavy load and high torque conditions.

[0033] In some embodiments, a plurality of deformation grooves are arranged in a circular pattern around the center of the fixed brake disc 1, which helps to make the elastic deformation of each part of the deformation ring 103 more uniform and ensures that each part of the inner brake ring 102 can simultaneously abut against the corresponding part of the outer brake ring 22 to generate a larger braking force when the brake pad is braking.

[0034] In the embodiment shown in the attached drawings, the deformation groove includes a plurality of first deformation grooves 11 and a plurality of second deformation grooves 12. The plurality of first deformation grooves 11 are arranged in a first circle around the center of the fixed brake disc 1 at intervals, and the plurality of second deformation grooves 12 are arranged in a second circle around the center of the fixed brake disc 1 at intervals. The inner diameter R1 of the brake inner ring 102 is less than the radius R2 of the first circle and less than the radius R3 of the second circle.

[0035] On the follower brake disc 2, the inner diameter R4 of the outer brake ring 22 is approximately equal to the inner diameter R1 of the inner brake ring 102, while the outer diameter R5 of the outer brake ring 22 is greater than the inner diameter R1 of the inner brake ring 102, and the inner diameter R6 of the fixed inner ring 21 is less than the inner diameter R1 of the inner brake ring 102. Therefore, when the follower brake disc 2 and the fixed brake disc 1 are installed coaxially, with the follower brake disc 2 positioned between two adjacent fixed brake discs 1, the outer brake ring 22 and the inner brake ring 102 are positioned opposite each other, while the fixed inner ring 21 extends out into the orthographic projection plane of the inner axis of the inner brake ring 102.

[0036] To facilitate the installation of brake pads 100, two adjacent fixed brake discs 1 are fixed together by an outer shim 3. The outer shim 3 also determines the assembly spacing between two adjacent fixed brake discs 1 to ensure that there is a braking gap 5 between the follower brake disc 2 and the two adjacent fixed brake discs 1.

[0037] The outer gasket 3 is fixed between the fixing outer rings 101 of two adjacent fixing brake discs 1. For example, the fixing outer ring 101 of fixing brake disc 1 is provided with a plurality of first fixing holes 109, and the outer gasket 3 is also provided with a through hole corresponding to the first fixing hole 109. The screw is used to lock the outer gasket 3 through the first fixing hole 109 of fixing brake disc 1 and the through hole of fixing brake disc 1.

[0038] When the brake pad 100 includes more than two fixed brake discs 1, since a follower brake disc 2 is provided between each of two adjacent fixed brake discs 1, the number of follower brake discs 2 also exceeds one. For example, see attached... Figure 3 The brake pad 100 shown includes three fixed brake discs 1 and two follower brake discs 2.

[0039] When there are multiple follower brake discs 2, each follower brake disc 2 is positioned and installed to facilitate the assembly of brake pads 100. At this time, two adjacent follower brake discs 2 are fixed together by an inner gasket 4.

[0040] Specifically, the inner gasket 4 is fixed between the inner rings 21 of two adjacent follower brake discs 2. For example, the inner ring 21 of the follower brake disc 2 is provided with multiple second fixing holes 23, and the inner gasket 4 is also provided with a through hole corresponding to the second fixing hole 23. The screw is used to lock the inner ring 21 of the follower brake disc 2 and the through hole of the inner gasket 4.

[0041] Combination Figure 5As shown, this application also discloses a direct-drive turntable using the aforementioned brake pad 100. The direct-drive turntable includes a turntable fixed portion 61, a turntable rotating portion 62, and a brake cavity 63 formed between the turntable fixed portion 61 and the turntable rotating portion 62. The brake pad 100 is disposed at the bottom of the brake cavity 63. The fixed brake disc 1 is fixedly connected to the turntable fixed portion 61, while the follower brake disc 2 is fixedly connected to the turntable rotating portion 62.

[0042] The fixed part 61 of the turntable typically includes a turntable housing and a motor stator fixed inside the turntable housing; the rotating part 62 of the turntable typically includes a motor rotor. Therefore, the follow-up brake disc 2 is sleeved and fixed on the motor rotor, while the fixed brake disc 1 is fixed on the turntable housing or the motor stator.

[0043] A brake block 64 and a spring 65 connected to the upper end of the brake block 64 are also provided in the brake chamber 63. The upper and lower ends of the brake block 64 are respectively provided with flow channels 641. When brake oil or gas is injected into the brake chamber 63 through the flow channels 641, the brake block 64 is pushed upward, and the spring 65 is compressed, so that the brake block 64 does not generate braking force on the fixed brake disc 1. When it is necessary to use the brake pads 100 to brake the rotating part 62 of the turntable, the brake oil or gas in the brake chamber 63 is discharged. Under the elastic force of the spring 65, the brake block 64 generates a braking force on the fixed brake disc 1, pushing the inner brake ring 102 of the fixed brake disc 1 to move quickly toward the outer brake ring 22 of the follower brake disc 2, eliminating the braking gap 5 between the two and quickly forming a contact fit to achieve fast and reliable braking.

[0044] A sealing element 66 is also provided between the brake block 64 and the inner wall of the brake chamber 63. The sealing ring 66 is generally a rubber or silicone sealing ring or sealing strip. By setting the sealing element 66, a good sealing fit is maintained between the brake block 64 and the inner wall of the brake chamber 63 during the braking operation.

[0045] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. Brake pads for a direct-drive turntable, comprising a plurality of fixed brake discs coaxially spaced apart and a follower brake disc located between any two adjacent fixed brake discs, wherein the fixed brake discs are sequentially divided into an inner braking ring, a deformation ring, and a fixed outer ring from the center to the outer circumference, and the follower brake discs are sequentially divided into a fixed inner ring and a braking outer ring from the center to the outer circumference; characterized in that, The outer brake ring and the inner brake ring are positioned opposite each other and have a braking gap between them; several deformation grooves are provided on the deformation ring, and the deformation grooves are arranged at intervals around the center of the fixed brake disc.

2. The brake pad of claim 1, wherein Several deformation grooves are arranged in a circle around the center of the fixed brake disc.

3. The brake pad of claim 1, wherein The deformation groove includes several first deformation grooves and several second deformation grooves. The several first deformation grooves are arranged in a first circle around the center of the fixed brake disc, and the several second deformation grooves are arranged in a second circle around the center of the fixed brake disc. The inner diameter R1 of the brake inner ring is less than the radius R2 of the first circle and less than the radius R3 of the second circle.

4. The brake pad of claim 1, wherein The inner diameter R4 of the outer brake ring is equal to the inner diameter R1 of the inner brake ring. The outer diameter R5 of the outer brake ring is greater than the inner diameter R1 of the inner brake ring, while the inner diameter R6 of the fixed inner ring is less than the inner diameter R1 of the inner brake ring.

5. The brake pad of claim 1, wherein It also includes an outer gasket, which is fixed between the outer rings of two adjacent fixed brake discs.

6. The brake pad of any one of claims 1-5, wherein, If there are more than two fixed brake discs, a follower brake disc is installed between any two adjacent fixed brake discs.

7. The brake pad of claim 6, wherein, It also includes an inner gasket, which is fixed between the inner rings of two adjacent follow-up brake discs.

8. A motor direct drive rotary table, comprising a rotary table fixed part, a rotary table rotating part and a brake cavity formed between the rotary table fixed part and the rotary table rotating part; characterized in that, The brake chamber is provided with brake pads as described in any one of claims 1-7, the fixed brake disc is fixedly connected to the fixed part of the turntable, and the follower brake disc is fixedly connected to the rotating part of the turntable.

9. The motor direct drive rotary table of claim 8, wherein, The brake chamber is also equipped with a brake block and a spring connected to the upper end of the brake block, and the upper and lower ends of the brake block are respectively provided with flow channels.

10. The motor direct drive rotary table of claim 9, wherein, A seal is provided between the brake pad and the inner wall of the brake chamber.

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