A rotating shaft braking device

Abstract

This invention proposes a braking device for a rotating shaft, comprising a rotating shaft with a passive braking mechanism sleeved on the shaft. The passive braking mechanism has a plate-like object that deforms towards the rotating shaft. When an external fluid supply device injects fluid into the cavity formed by the fluid ring and the external connector, the fluid is evenly distributed through the fluid ring and enters the grooves. The fluid applies pressure to the plate-like object. When the plate-like object cannot withstand the pressure of the fluid, it deforms towards the rotating shaft until it contacts and locks the rotating shaft. Due to the arrangement of multiple grooves, the compressive force on the rotating shaft is uniform. At the same time, because the rotating shaft is passively force-bearing, the passively braked rotating shaft can withstand a large torsional force. The structure is simple and easy to install.

Description

Technical Field

[0001] This invention relates to the technical field of rotating shafts, and more specifically, to a braking device for rotating shafts. Background Technology

[0002] When a five-axis machine tool uses a torque motor direct-drive rotary table, it is necessary to brake the rotary table in two states: one is to brake it when it is powered on, and the other is to brake it when it is not powered on.

[0003] Currently, the Chinese patent publication number for braking in a non-powered state is CN110242685A, patent title: A rotary shaft braking device with safety function. The release oil chamber is filled with hydraulic oil, and the pressure in the release oil chamber is equal to the spring force of the plurality of rectangular springs. During braking, under the compression of the piston, the front side of the outer brake pad contacts the rear side of the inner brake pad, and the front side of the inner brake pad contacts the bearing seat.

[0004] Existing patent number: 202311158876.4, patent name: a braking device for a rotating shaft, which provides a pushing force to the piston through a hydraulic (gas) cylinder, compressing the elastic friction plate to contract. The elastic friction plate releases the brake pad, allowing the brake pad to rotate freely. When the hydraulic (gas) cylinder thrust disappears, the elastic friction plate is no longer compressed. The elasticity of the elastic material itself allows the compressed deformation to recover. The elastic friction plate contacts the brake pad and compresses the brake pad, causing the brake pad to stop rotating, thereby achieving braking.

[0005] However, when the turntable is performing high-torque cutting, even greater torque is required, but the torque of the aforementioned patent is not as high as the existing torque. The reason is that the existing torque is achieved by pushing the piston in the opposite direction to push the spring, so the force is relatively small. If the reverse force is too large, the piston will not be able to push, and the force applied to the brake pad will not be large.

[0006] Therefore, the problem that needs to be solved is that the braking torque of the current power-off protection is insufficient to cope with the working conditions of high torque braking, and how to perform high torque braking under power-on transition. Summary of the Invention

[0007] In view of this, in order to solve the above problems, the present invention proposes a braking device for a rotating shaft, including a rotating shaft 10, and a passive braking mechanism 20 is provided on the rotating shaft 10. The passive braking mechanism 20 is provided with a sheet-like object 21 that deforms toward the rotating shaft 10. When an external fluid supply device injects fluid into the cavity formed by the fluid ring 22 and the external connector 50, the fluid is evenly distributed through the fluid ring 22 and enters the groove 23. The fluid applies pressure to the sheet-like object 21. When the sheet-like object 21 cannot withstand the pressure of the fluid, it deforms toward the rotating shaft 10 until it contacts and locks the rotating shaft 10. Due to the arrangement of multiple grooves 23, the squeezing force on the rotating shaft 10 is uniform. At the same time, since the rotating shaft 10 is passively force-bearing, the passively braked rotating shaft 10 can withstand a large torsional force. The structure is simple and easy to install.

[0008] A braking device for a rotating shaft includes a rotating shaft 10, characterized in that: a passive braking mechanism 20 is provided on the rotating shaft 10, and a sheet-like object 21 that deforms toward the rotating shaft 10 is provided on the passive braking mechanism 20. By applying pressure to the sheet-like object 21, the sheet-like object 21 deforms toward the rotating shaft 10 until it contacts and locks the rotating shaft 10.

[0009] Furthermore, the passive braking mechanism 20 has a ring-shaped structure on the side near the rotating shaft 10, which can apply pressure to the rotating shaft 10 evenly.

[0010] Furthermore, a fluid ring 22 is provided at the annular structure to uniformly distribute the fluid. The fluid applies pressure to the sheet 21, thereby causing the sheet 21 to deform toward the rotating shaft 10 until it contacts and locks onto the rotating shaft 10.

[0011] Furthermore, the fluid is either a gas or a liquid.

[0012] In some embodiments, the fluid ring 22 is provided with a plurality of uniformly arranged grooves 23, and the sheet 21 is placed in the grooves 23 near the rotating shaft 10.

[0013] Furthermore, the groove 23 can be one of the following: waist-shaped, rectangular, or circular.

[0014] Furthermore, the inner ring of the passive braking device is sleeved with the rotating shaft 10, and the rotating shaft 10 can rotate relative to the braking device. The fluid ring 22 and the external connector 50 form a cavity, which is used to accommodate the fluid.

[0015] Furthermore, the external connector 50 is provided with a fluid inlet 51, the input end of the inlet 51 is connected to an external fluid supply device, and the output end of the inlet 51 is connected to the cavity.

[0016] Furthermore, the external connector 50 is fixed relative to the rotating shaft 10.

[0017] In some embodiments, a sealing structure is provided at the connection between the external connector 50 and the passive braking mechanism 20 to seal the cavity formed by the fluid ring 22 and the external connector 50.

[0018] Furthermore, the external connector 50 is a concave annular structure, and the passive braking mechanism 20 is placed within its concave annular structure.

[0019] Furthermore, the lower part of the passive braking mechanism 20 extends away from the rotating shaft 10 and is provided with an extension block 24. The extension block 24 is fixedly connected to the external connector 50 and a second sealing ring 40 is provided at the connection between the extension block 24 and the external connector 50. A first sealing ring 30 is provided at the connection between the upper part of the passive braking mechanism 20 and the external connector 50, so that the cavity formed by the fluid ring 22 and the external connector 50 is sealed.

[0020] In some embodiments, the upper part of the passive braking mechanism 20 away from the rotating shaft 10 is provided with a retaining ring 25, and a groove 52 is provided at the position corresponding to the retaining ring 25 and located in the concave annular structure of the external connector 50. The retaining ring 25 is matched and engaged with the groove 52. When the fluid applies a large force to the sheet 21, the passive braking mechanism 20 as a whole is easily pushed, and the groove 52 limits the retaining ring 25.

[0021] Furthermore, the external connector 50 is fixedly connected to the mechanism sleeved outside the rotating shaft 10.

[0022] In some embodiments, the rotating shaft 10 is further provided with an active braking device 70 and a brake pad 60. The active braking device 70 includes a first cover 71, which is a hollow annular structure. The inner side of the first cover 71 is provided with an elastically deformable upward deformable member 72. The brake pad 60 is fixedly connected to the rotating shaft 10 in the rotation direction and is an annular structure. A pressure cap 73 is fixedly connected to a mechanism sleeved on the outside of the rotating shaft 10. The outer edge of the brake pad 60 is placed between the pressure cap 73 and the deformable member 72. A piston 74 is provided on the inner side of the first cover 71 and on the outer side of the deformable member 72. The piston 74 is located on the side close to the deformable member 72. A first boss 75 is provided, which is located at the lower part of the outer edge of the deformable part 72. By applying pressure to the lower part of the piston 74, the piston 74 is pushed upward, causing the deformable part 72 to be squeezed upward and retracted. The deformable part 72 releases the brake pad 60, allowing the brake pad 60 to rotate freely. When no pressure is applied to the lower part of the piston 74, the elastic force of the deformation of the material of the deformable part 72 itself squeezes the piston 74 to fall downward. The deformable part 72 restores its original shape and elastic pressure, contacts the brake pad 60 and squeezes the brake pad 60, causing the brake pad 60 to contact and squeeze the pressure cap 73. The brake pad 60 stops rotating due to double-sided friction and compression, thus achieving braking.

[0023] Furthermore, the active braking device 70 and the passive braking device are located on the same side or at both ends of the rotating shaft 10.

[0024] Working principle: When the external fluid supply device injects fluid into the cavity formed by the fluid ring 22 and the external connector 50, the fluid is evenly distributed through the fluid ring 22 and enters the groove 23. The fluid applies pressure to the sheet 21. When the sheet 21 cannot withstand the pressure of the fluid, the sheet 21 deforms towards the rotating shaft 10 until it contacts and locks the rotating shaft 10. Due to the arrangement of multiple grooves 23, the compressive force on the rotating shaft 10 is uniform. At the same time, since the rotating shaft 10 is passively force-bearing, the passively braked rotating shaft 10 can withstand a large torsional force.

[0025] The beneficial effects of the present invention are as follows: The present invention proposes a braking device for a rotating shaft, including a rotating shaft 10. A passive braking mechanism 20 is sleeved on the rotating shaft 10. The passive braking mechanism 20 is provided with a sheet-like object 21 that deforms toward the rotating shaft 10. When an external fluid supply device injects fluid into the cavity formed by the fluid ring 22 and the external connector 50, the fluid is evenly distributed through the fluid ring 22 and enters the groove 23. The fluid applies pressure to the sheet-like object 21. When the sheet-like object 21 cannot withstand the pressure of the fluid, it deforms toward the rotating shaft 10 until it contacts and locks the rotating shaft 10. Due to the arrangement of multiple grooves 23, the squeezing force on the rotating shaft 10 is uniform. At the same time, because the rotating shaft 10 is passively force-bearing, the passively braking rotating shaft 10 can withstand a large torsional force. The structure is simple and easy to install. Attached Figure Description

[0026] Figure 1 This is a cross-sectional view of the braking device of the rotating shaft of the present invention.

[0027] Figure 2 This is a cross-sectional view of the passive braking device for the rotating shaft of the present invention.

[0028] Figure 3 This is a cross-sectional view of the active braking device for the rotating shaft of the present invention.

[0029] Figure 4 This is a perspective view of the passive braking mechanism of the rotating shaft of the present invention.

[0030] Figure 5 This is a perspective view of the external connector of the rotating shaft of the present invention.

[0031] Explanation of main component symbols

[0032]

[0033]

[0034] The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation

[0035] Example:

[0036] like Figure 1 , Figure 2 , Figure 4As shown, a braking device for a rotating shaft includes a rotating shaft 10. A passive braking mechanism 20 has an annular structure on the side near the rotating shaft 10. The inner ring of the passive braking device is sleeved with the rotating shaft 10, allowing the rotating shaft 10 to rotate relative to the braking device. A fluid ring 22 is provided at the annular structure for uniformly distributing fluid, which can be either gas or liquid. The fluid ring 22 has multiple uniformly arranged grooves 23. A sheet-like object 21 is placed in the groove 23 near the rotating shaft 10. The groove 23 can be one of an oval, rectangular, or circular shape. The fluid ring 22 and an external connector 50 form a cavity for accommodating the fluid. The external connector 50 has a fluid inlet 51. The input end of the inlet 51 connects to an external fluid supply device, and the output end of the inlet 51 communicates with the cavity. The external connector 50 is fixed relative to the rotating shaft 10 and is a concave annular structure. The passive braking mechanism 20 is placed within it. Within the concave annular structure, the lower part of the passive braking mechanism 20 extends away from the rotating shaft 10 and is provided with an extension block 24. The extension block 24 is fixedly connected to the external connector 50, and a second sealing ring 40 is provided at the connection between the extension block 24 and the external connector 50. A first sealing ring 30 is provided at the connection between the upper part of the passive braking mechanism 20 and the external connector 50, so that the cavity formed by the fluid ring 22 and the external connector 50 is sealed. When the external fluid supply device injects fluid into the cavity formed by the fluid ring 22 and the external connector 50, the fluid is evenly distributed through the fluid ring 22 and enters the groove 23. The fluid applies pressure to the sheet 21. When the sheet 21 cannot withstand the pressure of the fluid, the sheet 21 deforms towards the rotating shaft 10 until it contacts and locks the rotating shaft 10. Due to the arrangement of multiple grooves 23, the squeezing force on the rotating shaft 10 is uniform. At the same time, because the rotating shaft 10 is passively force-bearing, the passively braked rotating shaft 10 can withstand a large torsional force.

[0037] like Figure 2 , Figure 4 , Figure 5 As shown, the upper part of the passive braking mechanism 20, away from the rotating shaft 10, is provided with a retaining ring 25. The retaining ring 25 is located at a position corresponding to the concave annular structure of the external connector 50, and a slot 52 is provided. The retaining ring 25 and the slot 52 are matched and engaged. When the fluid applies a large force to the sheet 21, the passive braking mechanism 20 can be easily pushed. The slot 52 limits the retaining ring 25. The external connector 50 is fixedly connected to the mechanism sleeved outside the rotating shaft 10.

[0038] like Figure 3 , Figure 1As shown, the rotating shaft 10 is also provided with an active braking device 70 and a brake pad 60, wherein the active braking device 70 and the passive braking device are located on the same side or at both ends of the rotating shaft 10.

[0039] The active braking device 70 includes a first cover 71, which is a hollow annular structure. An elastically deformable upward-deformable member 72 is provided on the inner side of the first cover 71. The brake pad 60 is fixedly connected to the rotating shaft 10 in the rotational direction. The brake pad 60 is an annular structure. A pressure cap 73 is fixedly connected to a mechanism sleeved on the outside of the rotating shaft 10. The outer edge of the brake pad 60 is positioned between the pressure cap 73 and the deformable member 72. A piston 74 is provided on the inner side of the first cover 71 and on the outer side of the deformable member 72. A first boss 75 is provided on the side of the piston 74 closest to the deformable member 72. 5 is placed at the lower part of the outer edge of the deformable part 72. By applying pressure to the lower part of the piston 74, the piston 74 is pushed upward, causing the deformable part 72 to be squeezed upward and retracted. The deformable part 72 releases the brake pad 60, allowing the brake pad 60 to rotate freely. When no pressure is applied to the lower part of the piston 74, the elastic force of the deformation of the material of the deformable part 72 itself squeezes the piston 74 to fall downward. The deformable part 72 restores its original shape and elastic pressure, contacts the brake pad 60 and squeezes the brake pad 60, causing the brake pad 60 to contact and squeeze with the pressure cap 73. The brake pad 60 stops rotating due to double-sided friction and compression, thus achieving braking.

[0040] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A braking device for a rotating shaft, comprising a rotating shaft (10), characterized in that: The rotating shaft (10) is fitted with a passive braking mechanism (20). The passive braking mechanism (20) has a sheet-like object (21) that deforms towards the rotating shaft (10). By applying pressure to the sheet-like object (21), the sheet-like object (21) deforms towards the rotating shaft (10) until it contacts and locks the rotating shaft (10). The passive braking mechanism (20) has an annular structure on the side near the rotating shaft (10) to apply pressure evenly to the rotating shaft (10). A fluid ring (22) is provided at the annular structure to distribute the fluid evenly. By applying pressure to the sheet-like object (21) through the fluid, the sheet-like object (21) deforms towards the rotating shaft (10) until it contacts and locks the rotating shaft. 10), the fluid ring (22) is provided with a plurality of uniformly arranged grooves (23), the sheet (21) is placed in the groove (23) near the rotating shaft (10), the inner ring of the passive braking mechanism (20) is sleeved with the rotating shaft (10), the rotating shaft (10) can rotate relative to the braking device, the fluid ring (22) and the external connecting part (50) form a cavity, the cavity is used to accommodate the fluid; the rotating shaft (10) is also provided with an active braking device (70) and a brake pad (60), the active braking device (70) includes a first cover (71), the first cover (71) is a hollow annular structure, the first cover (71) The inner side of the first cover (71) is provided with an elastic deformable member (72) that can deform upward. The brake pad (60) is fixedly connected to the rotating shaft (10) in the rotation direction. The brake pad (60) has a ring structure. The pressure cover (73) is fixedly connected to the mechanism sleeved on the outside of the rotating shaft (10). The outer edge of the brake pad (60) is placed between the pressure cover (73) and the deformable member (72). A piston (74) is provided on the inner side of the first cover (71) and on the outer side of the deformable member (72). A first boss (75) is provided on the side of the piston (74) near the deformable member (72). The first boss (75) is placed at the lower part of the outer edge of the deformable member (72). When pressure is applied to the lower part of the piston (74), the piston (74) is pushed upward, causing the deformable part (72) to be squeezed upward and retracted. The deformable part (72) releases the brake pad (60), allowing the brake pad (60) to rotate freely. When no pressure is applied to the lower part of the piston (74), the elastic force of the deformation of the material of the deformable part (72) itself squeezes the piston (74) to fall downward. The deformable part (72) restores its original shape and elastic pressure, contacts the brake pad (60), and squeezes the brake pad (60) so that the brake pad (60) contacts and squeezes the pressure cap (73). The brake pad (60) stops rotating due to double-sided friction and squeezing, thus achieving braking.

2. The braking device for the rotating shaft as described in claim 1, characterized in that: The fluid is either a gas or a liquid.

3. The braking device for the rotating shaft as described in claim 1, characterized in that: The groove (23) can be one of the following: waist-shaped, rectangular, or circular.

4. The braking device for the rotating shaft as described in claim 1, characterized in that: The external connector (50) is provided with a fluid inlet (51). The input end of the inlet (51) is connected to an external fluid supply device, and the output end of the inlet (51) is connected to the cavity. The external connector (50) is fixed relative to the rotating shaft (10).

5. The braking device for the rotating shaft as described in claim 1, characterized in that: The connection between the external connector (50) and the passive braking mechanism (20) is provided with a sealing structure to seal the cavity formed by the fluid ring (22) and the external connector (50).

Images