Main shaft brake clamping device

Abstract

The utility model discloses a main shaft brake clamping device which comprises a main shaft core shaft part, a brake adjusting part and a brake clamping part, the main shaft core shaft part is connected with a main shaft negative end outer sleeve in a matched mode through a rotating bearing, the brake adjusting part is fixedly connected with the main shaft negative end outer sleeve, and the brake clamping part is fixedly connected with the brake adjusting part. The main shaft core shaft part comprises a main shaft core shaft, a brake fastening nut, a brake pad pressing ring, a rotary brake pad and a brake fixing sleeve, the main shaft core shaft is sleeved with the brake fastening nut through threads, and the brake fastening nut and the main shaft core shaft can rotate relative to each other; the brake fixing sleeve is sleeved on the spindle core shaft and is in key connection with the spindle core shaft through a flat key, the brake fixing sleeve can axially move on the spindle core shaft, the brake fastening nut is located at one end close to the spindle negative end outer sleeve, and the brake fixing sleeve is located at one end far away from the spindle negative end outer sleeve. And the brake fixing sleeve is locked through a draw-in bolt and a brake fastening nut, so that the brake fixing sleeve is fixedly mounted on the spindle core shaft.

Description

Technical Field

[0001] The utility model belongs to the technical field of machine tools, and in particular relates to a spindle brake clamping device. Background Art

[0002] With the development of the times, the machining process of machine tools has become increasingly complex, so various compound machine tools with multiple axial functions have emerged. These machine tools require their spindles to be able to position at different angles and remain stable, which is crucial to ensuring machining quality.

[0003] At present, the main locking methods of machine tool spindles include hydraulic locking, gear clamping and electromagnetic locking. However, these methods all have certain limitations. For example, gear clamping is limited by the number of teeth on the indexing plate and cannot be clamped at any angle; the torque of electromagnetic locking is limited by the power of the motor, and its stability is low when processing at high torque. In contrast, hydraulic locking is a more commonly used method, but the processing and installation process of its main components such as cylinders and pistons is very complicated. Conventionally, to achieve stability, cylinder pistons are arranged on the left and right sides of the rotating brake disc to brake, which is costly, and the stability of using a single piston is low. Therefore, it is necessary to research and develop a new type of spindle brake clamping device. Utility Model Content

[0004] The utility model aims to solve the problems of the prior art and provides a spindle brake clamping device to improve its positioning stability and reduce costs.

[0005] In order to solve the technical problem, the technical solution of the utility model is: a spindle brake clamping device, including a spindle core shaft component, a brake adjustment component and a brake clamping component, the spindle core shaft component is matched and connected with the spindle negative end outer sleeve through a rotating bearing, the brake adjustment component is fixedly connected with the spindle negative end outer sleeve, and the brake clamping component is fixedly connected with the brake adjustment component;

[0006] The spindle core shaft component includes a spindle core shaft, a brake locking nut, a brake pad pressure ring, a rotating brake pad and a brake fixing sleeve, the brake locking nut is sleeved on the spindle core shaft through a thread, and the brake locking nut and the spindle core shaft can rotate relative to each other; the brake fixing sleeve is sleeved on the spindle core shaft and connected by a flat key, and the brake fixing sleeve can make axial movement on the spindle core shaft, the brake locking nut is located at one end close to the spindle negative end outer sleeve, and the brake fixing sleeve is located at one end away from the spindle negative end outer sleeve, and the brake fixing sleeve is locked with the brake locking nut by a tightening bolt so that it is fixedly installed on the spindle core shaft; the rotating brake pad is fixedly connected to the brake fixing sleeve by a clamping bolt, and the rotating brake pad is pressed on the brake fixing sleeve by a brake pad pressure ring;

[0007] The brake adjustment component is arranged outside the main shaft core shaft component, and is not connected to the main shaft core shaft component when not braking. When braking, the brake adjustment component is connected to the rotating brake pad by extrusion;

[0008] The brake clamping component includes a piston cylinder, a main piston and a secondary piston. The main piston and the secondary piston are arranged in the piston cylinder. The inner ring of the main piston is pressed against the outer ring of the secondary piston. The main piston is provided with a locking shaft, and the locking shaft is provided with a disc spring. The piston cylinder is fixedly connected to the brake adjustment component.

[0009] Preferably, a brake adjustment pad is provided between the brake adjustment component and the negative end outer sleeve of the main shaft, and the brake adjustment component is tightly attached to the negative end outer sleeve of the main shaft through the brake adjustment pad.

[0010] Preferably, the brake adjustment pad is a multi-piece open brake adjustment pad, the brake adjustment pad is connected to the brake adjustment component by bolts, the brake adjustment pad is a split structure, and the inner ring of the brake adjustment pad is circumferentially provided with a plurality of open slots, and the open slots are used to cooperate with the bolts set on the brake adjustment pad.

[0011] Preferably, the main piston, the auxiliary piston and the locking shaft are all provided with Gly rings or O-rings.

[0012] Preferably, the brake adjustment component is fixedly connected to the negative end sleeve of the main shaft by bolts, the brake clamping component is fixedly connected to the brake adjustment component by bolts, and the piston cylinder is fixedly connected to the brake adjustment component by bolts.

[0013] Preferably, the main piston is fixedly connected to the locking shaft via bolts.

[0014] Preferably, the piston cylinder is also provided with a sealing member.

[0015] Compared with the prior art, the advantages of the utility model are:

[0016] (1) The utility model provides a spindle brake clamping device that reduces the gap between the rotating brake pad and the spindle negative end connecting sleeve through a brake adjustment component, thereby improving stability. In conjunction with the brake clamping component, a single-piston stable brake is achieved, and the piston cylinder is arranged on only one side of the rotating brake disc, thereby reducing costs.

[0017] (2) The force of the brake clamping in the spindle brake clamping device of the utility model is provided to the spindle core shaft by the rotating brake pad, and the spindle core shaft part is not directly involved, which can better protect the spindle core shaft parts;

[0018] (3) The brake adjustment pad of the spindle brake clamping device of the utility model is a split type with an open slot. During the grinding process, there is no need to remove the entire brake adjustment component. The adjustment pad can be disassembled and assembled by only loosening the fixing bolts, which reduces the difficulty of installation and adjustment;

[0019] (4) The utility model has a main shaft brake clamping device, and only the contact part between the inner hole of the piston cylinder and the sealing ring has high processing requirements. The main and auxiliary piston seals are shaft seals, which are easier to process and install, thus reducing costs.

[0020] (5) The utility model adopts a dual-piston design for the spindle brake clamping device, which increases the force-bearing area of ​​the piston, can use a smaller oil pressure to generate a larger clamping force, and reduces the requirements for the use environment;

[0021] (6) The utility model discloses a spindle brake clamping device that uses a disc spring for reset operation and can be automatically released without oil pressure, thereby effectively preventing the brake pad from being worn. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 , a schematic diagram of the overall structure of a spindle brake clamping device of the utility model;

[0023] Figure 2 , a schematic diagram of the installation layout of a spindle brake clamping device of the utility model;

[0024] Figure 3 , a schematic diagram of the structure of a spindle core shaft component of a spindle brake clamping device of the utility model;

[0025] Figure 4 , a schematic diagram of the structure of a brake adjustment component and a brake clamping component of a spindle brake clamping device of the utility model;

[0026] Figure 5 , a schematic diagram of the structure of a brake adjustment pad of a spindle brake clamping device of the utility model;

[0027] Figure 6 , a schematic diagram of the state of components of a spindle brake clamping device when not clamped;

[0028] Figure 7 , a schematic diagram of the component states of a spindle brake clamping device of the utility model when clamping.

[0029] Description of reference numerals:

[0030] 1. Spindle core shaft component, 2. Brake adjustment component, 3. Brake clamping component, 4. Brake locking nut, 5. Brake pad pressure ring, 6. Rotating brake pad, 7. Brake fixing sleeve, 8. Spindle core shaft, 9. Flat key; 10. Brake adjustment pad, 11. Spindle negative end outer sleeve, 12. Piston cylinder, 13. Main piston, 14. Auxiliary piston, 15. Locking shaft, 16. Disc spring, 17. Tension bolt, 18. Compression bolt, 19. Hydraulic oil inlet, 20. Seal, 101. Open slot. DETAILED DESCRIPTION

[0031] The following describes the specific implementation of the utility model in conjunction with embodiments:

[0032] It should be noted that the structures, proportions, sizes, etc. shown in this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them, and are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0033] Example 1

[0034] like Figure 1-Figure 7 As shown, a spindle brake clamping device comprises a spindle core shaft component 1, a brake adjustment component 2 and a brake clamping component 3, wherein the spindle core shaft component 1 is matched and connected with the spindle negative end outer sleeve 11 through a rotary bearing, the brake adjustment component 2 is fixedly connected with the spindle negative end outer sleeve 11, and the brake clamping component 3 is fixedly connected with the brake adjustment component 2;

[0035] The spindle core shaft component 1 includes a spindle core shaft 8, a brake locking nut 4, a brake pad pressure ring 5, a rotating brake pad 6 and a brake fixing sleeve 7. The brake locking nut 4 is threadedly sleeved on the spindle core shaft 8, and the brake locking nut 4 and the spindle core shaft 8 can rotate relative to each other; the brake fixing sleeve 7 is sleeved on the spindle core shaft 8 and connected by a flat key 9, and the brake fixing sleeve 7 can make axial movement on the spindle core shaft 8, the brake locking nut 4 is located at one end close to the spindle negative end outer sleeve 11, and the brake fixing sleeve 7 is located at one end away from the spindle negative end outer sleeve 11, and the brake fixing sleeve 7 is locked with the brake locking nut 4 by a tightening bolt 17 so that it is fixedly installed on the spindle core shaft 8; the rotating brake pad 6 is fixedly connected to the brake fixing sleeve 7 by a clamping bolt 18, and the rotating brake pad 6 is pressed on the brake fixing sleeve 7 by a brake pad pressure ring 5;

[0036] The brake adjustment component 2 is arranged outside the main shaft core shaft component 1, and is not connected to the main shaft core shaft component 1 when not braking. When braking, the brake adjustment component 2 is connected to the rotating brake pad 6 by extrusion;

[0037] The rotating brake pad 6 is fixed to the main shaft component 1 in an indirect manner.

[0038] The brake adjustment component 2 is installed outside the main shaft core shaft component 1, and is used to adjust the gap size between the rotating brake pad and the back. It does not contact the main shaft core shaft component 1, and only contacts when braking. It is the component that squeezes the rotating brake pad and leans against it after the rotating brake pad is deformed.

[0039] The brake clamping component 3 includes a piston cylinder 12, a main piston 13 and a secondary piston 14. The main piston 13 and the secondary piston 14 are arranged in the piston cylinder 12. The inner ring of the main piston 13 is pressed against the outer ring of the secondary piston 14. The main piston 13 is provided with a locking shaft 15. The locking shaft 15 is provided with a disc spring 16. The piston cylinder 12 is fixedly connected to the brake adjustment component 2.

[0040] The brake locking nut 4 is connected to the main shaft core shaft 8 by a threaded connection and cannot make axial movement, but can rotate relatively. The brake fixing sleeve 7 is fixed to the main shaft core shaft 8 by a flat key 9 and cannot rotate, but can move axially. The rotating brake pad 6 is fixedly connected to the brake fixing sleeve 7 by a clamping bolt 18. The brake fixing sleeve 7 and the brake locking nut 4 are locked to each other by a tightening bolt 17, so that the brake locking nut 4 that was originally rotatable cannot rotate, and the brake fixing sleeve 7 that was originally axially movable cannot move axially, thereby achieving an overall fixing effect. The brake locking nut 4 axially fixes the rotating brake pad 6, and the brake fixing sleeve 7 prevents the rotating brake pad 6 from rotating.

[0041] The brake fixing sleeve 7 is mechanically constrained with the main shaft core shaft 8 through the flat key 9, and then tightened and fixed through the bolts and the brake fixing nut 4, so that all parts of the main shaft core shaft component 1 are fixed together.

[0042] The rotating brake pad comprises an outer ring and an inner ring, the inner ring part is fixed on the brake fixing sleeve, and the outer ring part is used to be clamped by the brake. The rotating brake pad of the spindle brake clamping device of the utility model is clamped by the outer ring, and the inner ring is fixed, and the torque during clamping is increased by increasing the lever arm.

[0043] Example 2

[0044] Preferably, a brake adjustment pad 10 is provided between the brake adjustment component 2 and the spindle negative end outer sleeve 11 , and the brake adjustment component 2 is closely attached to the spindle negative end outer sleeve 11 via the brake adjustment pad 10 .

[0045] The brake adjustment pad 10 is a multi-piece open brake adjustment pad, which is connected to the brake adjustment component 2 by bolts. The brake adjustment pad 10 is a split structure, and a plurality of open slots 101 are circumferentially arranged on the inner ring of the brake adjustment pad 10. The open slots 101 are used to cooperate with the bolts arranged on the brake adjustment pad 10.

[0046] like Figure 5 As shown, the inner ring of the brake adjustment pad 10 is circumferentially provided with 6 open slots 101 , and a groove is further provided between every two open slots 101 on the inner ring of the brake adjustment pad 10 to avoid the wire hole.

[0047] The split structure cooperates with the open slot hole, so that the brake adjustment pad can be taken out and ground and adjusted without removing the bolts of the brake adjustment component.

[0048] Preferably, the main piston 13 , the auxiliary piston 14 , and the locking shaft 15 are all provided with Gly rings or O-rings.

[0049] The main piston 13 and the auxiliary piston 14 are installed in cooperation with each other, and both the main piston 13 and the auxiliary piston 14 use a shaft sealing process.

[0050] The brake adjustment pad is split with an open slot. It can be taken out after loosening the bolts connecting the brake adjustment component and the negative end outer sleeve of the main shaft. The thickness can be adjusted by grinding to adjust the gap between the rotating brake pad and the brake adjustment component. The brake clamping component is provided with a main piston and a sub-piston. The main and sub-pistons are both sealed by shaft sealing. The sub-piston is installed first, and then the main piston. The inner ring step of the main piston presses the outer ring surface of the sub-piston. The main piston is fixedly connected to the locking shaft by bolts. A disc spring is arranged in the locking shaft. When the disc spring tightens the main piston, it will passively tighten the sub-piston.

[0051] Preferably, the brake adjustment component 2 is fixedly connected to the spindle negative end sleeve 11 by bolts, the brake clamping component 3 is fixedly connected to the brake adjustment component 2 by bolts, and the piston cylinder 12 is fixedly connected to the brake adjustment component 2 by bolts.

[0052] Preferably, the main piston 13 is fixedly connected to the locking shaft 15 by bolts.

[0053] The locking shaft and the main piston are fixedly connected by bolts. After the disc spring is compressed, the elastic force pushes the locking shaft outward, pulling the main piston outward, separating the main piston from the rotating brake disc to prevent friction loss.

[0054] Preferably, the piston cylinder 12 is also provided with a sealing member 20. Figure 4 The piston cylinder shown is provided with a sealing groove, on which a sealing member is provided. The sealing member provides a sealing function for the hydraulic cylinder and the piston to realize the clamping displacement of the piston.

[0055] The working principle of the utility model is as follows:

[0056] like Figure 1-7As shown, the working principle of the spindle brake clamping device of the utility model is that the hydraulic cylinder pushes the piston to press against the brake pad, and the static friction generated by the pressure between the piston and the brake pad is used to maintain a stationary state. When milling is required, the spindle brake clamping is required, and the spindle motor is positioned first, and then the piston cylinder 12 begins to be filled with oil to generate oil pressure. The main piston 13 moves forward under the action of the oil pressure, and the secondary piston 14 moves forward at the same time under the action of the oil pressure. The outer ring of the secondary piston 14 presses against the inner ring step of the main piston 13, and together they apply force to press against the rotating brake pad 6. The rotating brake pad 6 After being subjected to force, it is tightly attached to the end face of the brake adjustment component 2, and the rotating brake pad 6 is squeezed by the main piston 13 and the brake adjustment component 2, and remains motionless to complete the brake clamping action. When the processing is completed, the cylinder unloads the force, and the disc spring 16 provides reverse elastic force after being compressed, and applies force to the locking shaft 15. The locking shaft 15 is subjected to the elastic force to pull the main piston 13 backward, and the main piston 13 applies a backward force to the secondary piston 14 through the contact surface with the secondary piston 14. The main piston 13 is disengaged from the rotating brake pad 6, and the rotating brake pad 6 rotates normally without force, and can be turned normally.

[0057] The utility model discloses a spindle brake clamping device which reduces the clearance between the rotating brake disc and the connecting sleeve at the negative end of the spindle through a brake adjusting component, thereby improving stability. In combination with the brake clamping component, an oil cylinder piston is arranged on only one side of the rotating brake disc, thereby achieving single-piston stable braking and reducing costs.

[0058] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of ordinary technicians in this field without departing from the purpose of the present invention.

[0059] Many other changes and modifications can be made without departing from the concept and scope of the utility model. It should be understood that the utility model is not limited to a specific embodiment, and the scope of the utility model is defined by the appended claims.

Claims

1. A spindle brake clamping device, Features: It comprises a spindle core shaft component (1), a brake adjustment component (2) and a brake clamping component (3), wherein the spindle core shaft component (1) is cooperatively connected to a spindle negative end outer sleeve (11) via a rotary bearing, the brake adjustment component (2) is fixedly connected to the spindle negative end outer sleeve (11), and the brake clamping component (3) is fixedly connected to the brake adjustment component (2); The spindle core shaft component (1) comprises a spindle core shaft (8), a brake fixing nut (4), a brake pad pressure ring (5), a rotating brake pad (6) and a brake fixing sleeve (7); the brake fixing nut (4) is sleeved on the spindle core shaft (8) through a thread, and the brake fixing nut (4) and the spindle core shaft (8) can rotate relative to each other; the brake fixing sleeve (7) is sleeved on the spindle core shaft (8) and is connected by a flat key (9); the brake fixing sleeve (7) can make axial movement on the spindle core shaft (8); the brake The locking nut (4) is located at one end close to the main shaft negative end outer sleeve (11), and the brake fixing sleeve (7) is located at one end away from the main shaft negative end outer sleeve (11). The brake fixing sleeve (7) is locked with the brake locking nut (4) by a tensioning bolt (17) so that it is fixedly installed on the main shaft core shaft (8); the rotating brake pad (6) is fixedly connected to the brake fixing sleeve (7) by a clamping bolt (18), and the rotating brake pad (6) is pressed on the brake fixing sleeve (7) by a brake pad pressure ring (5); The brake adjustment component (2) is arranged outside the main shaft core shaft component (1), and is not connected to the main shaft core shaft component (1) when the brake is not applied. When the brake is applied, the brake adjustment component (2) is connected to the rotating brake pad (6) by extrusion; The brake clamping component (3) comprises a piston cylinder (12), a main piston (13) and a secondary piston (14); the main piston (13) and the secondary piston (14) are arranged in the piston cylinder (12); the inner ring of the main piston (13) is pressed against the outer ring of the secondary piston (14); the main piston (13) is provided with a locking shaft (15); the locking shaft (15) is provided with a disc spring (16); and the piston cylinder (12) is fixedly connected to the brake adjustment component (2).

2. A spindle brake clamping device according to claim 1, Features: A brake adjustment pad (10) is provided between the brake adjustment component (2) and the spindle negative end outer sleeve (11), and the brake adjustment component (2) is closely attached to the spindle negative end outer sleeve (11) via the brake adjustment pad (10).

3. A spindle brake clamping device according to claim 2, Features: The brake adjustment pad (10) is a multi-piece open brake adjustment pad. The brake adjustment pad (10) is connected to the brake adjustment component (2) by bolts. The brake adjustment pad (10) is a split structure. The inner ring of the brake adjustment pad (10) is circumferentially provided with a plurality of open slots (101). The open slots (101) are used to cooperate with bolts provided on the brake adjustment pad (10).

4. A spindle brake clamping device according to claim 1, Features: The main piston (13), the auxiliary piston (14) and the locking shaft (15) are all provided with a Gly ring or an O-ring.

5. A spindle brake clamping device according to claim 1, Features: The brake adjustment component (2) is fixedly connected to the main shaft negative end sleeve (11) via bolts, the brake clamping component (3) is fixedly connected to the brake adjustment component (2) via bolts, and the piston cylinder (12) is fixedly connected to the brake adjustment component (2) via bolts.

6. A spindle brake clamping device according to claim 1, Features: The main piston (13) is fixedly connected to the locking shaft (15) via bolts.

7. A spindle brake clamping device according to claim 1, Features: The piston cylinder (12) is also provided with a sealing member (20).

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