An A-axis brake structure and an A-axis

Abstract

The utility model relates to machining center rotary table technical field discloses an A -axis brake structure and A -axis, include: brake inner race and brake outer race, the brake inner race is used for setting in the outside of mandrel, brake outer ring fixed setting, just brake outer ring sets up in brake inner race outside, still be provided with brake pad between brake inner race and brake outer race, brake pad is connected in the inner wall of brake outer ring, is provided with the oil injection hole for injecting oil to the gap between brake pad and the inner wall of brake outer ring on brake outer ring. Set up like this, is favorable to the simplification brake structure, promotes the brake effect.

Description

Technical Field

[0001] This utility model relates to the field of machining center turntable technology, and in particular to an A-axis brake structure. Background Technology

[0002] Five-axis cradle turntables play a crucial role in the machining of curved parts and are considered high-end functional components in CNC machine tools. Their structural layout is divided into single-pendulum cradles and double-pendulum cradles. A single-pendulum five-axis cradle turntable typically consists of three parts: the A-axis positive assembly, the A-axis negative assembly, and the C-axis assembly. The function of the A-axis negative assembly is to ensure the rigidity of the swing arm during rotation and to act as a brake on the A-axis.

[0003] Currently, the drive and braking devices of the single pendulum cradle turntable are installed in the positive and negative A-axis components, respectively. This leads to defects in machining accuracy and A-axis bearing life. The span of the swing arm is usually around 1 meter, which is relatively large. When the A-axis is working, especially when machining at a specific angle, the overall rigidity of the A-axis is reduced, which in turn causes the worktable to vibrate and deform, affecting the machining accuracy of the product.

[0004] Currently, typical turntable braking structures include two types: end-face contact braking structures and ring-type braking structures. End-face contact braking structures, commonly known as disc brakes, effectively prevent loosening through the static friction torque generated between the contacting end faces. Their disadvantages include low braking torque and poor braking reliability. Ring-type turntable braking structures, commonly known as ring brakes, effectively prevent loosening through the static friction torque generated between the contacting annular surfaces. Compared to disc brakes, they offer higher braking torque and more reliable braking performance. However, current ring brake technology suffers from disadvantages compared to disc brakes, such as complex structure, difficult component manufacturing, and higher cost. Utility Model Content

[0005] The purpose of this invention is to provide an A-axis braking structure to simplify the braking structure and improve the braking effect.

[0006] To achieve the above objectives, this utility model provides the following solution:

[0007] An A-axis brake structure includes: an inner brake ring and an outer brake ring. The inner brake ring is fitted onto the outside of a spindle. The outer brake ring is fixedly installed and fitted onto the outside of the inner brake ring. A brake pad is also provided between the inner brake ring and the outer brake ring. The brake pad is connected to the inner wall of the outer brake ring. The outer brake ring is provided with an oil injection hole for injecting oil into the gap between the brake pad and the inner wall of the outer brake ring.

[0008] Preferably, the brake pad has an oil-locking structure on the side near the outer ring of the brake, and the oil-locking structure is a raised structure.

[0009] Preferably, the protrusion structure is a tooth-shaped structure.

[0010] Preferably, the oil injection port is used to communicate with a hydraulic system, the hydraulic system including an oil pump and an oil pipe, and the oil pump is connected to the oil injection port through the oil pipe.

[0011] Preferably, the diameter of the mandrel is 2 to 3 times its axial length.

[0012] Preferably, the inner brake ring and the outer brake ring are made of carbon steel bar stock.

[0013] Preferably, the structure further includes a fixed connection assembly, to which the brake outer ring is connected.

[0014] Preferably, the fixed connection assembly includes an outer connection assembly and / or an inner connection assembly, the outer connection assembly being an outer shell, a portion of the brake outer ring being connected to the outer shell, and another portion of the brake outer ring being connected to the inner connection assembly.

[0015] Preferably, the mandrel has an internal cavity, and the inner connecting assembly includes a connecting plate, an inner sleeve, and an outer sleeve. The inner sleeve and the outer sleeve are both disposed within the cavity. The inner sleeve is fixedly disposed, and the outer sleeve is fitted over the inner sleeve. The inner sleeve and the outer sleeve are rotatably connected. The outer sleeve is connected to the mandrel via a flange. One end of the connecting plate is connected to the inner sleeve, and the other end of the connecting plate is connected to another part of the brake outer ring.

[0016] This utility model also provides an A-axis, including the above-mentioned A-axis braking structure, bearing assembly, spindle and rear cover, wherein the spindle is connected to the outer shell through the bearing assembly, and the rear cover is connected to the end face of the outer shell away from the bearing assembly.

[0017] According to the above description, the present invention discloses the following technical effects:

[0018] This utility model provides an A-axis braking structure and an A-axis, including: an inner brake ring, an outer brake ring, and a hydraulic system. The inner brake ring is fitted onto the outside of the spindle, and the outer brake ring is fixedly installed and fitted onto the outside of the inner brake ring. A brake pad is provided on the inner wall of the outer brake ring, and an oil injection hole is provided on the outer brake ring. The hydraulic system injects oil into the gap between the brake pad and the inner wall of the outer brake ring through the oil injection hole. When the A-axis needs to be braked, the hydraulic system injects oil into the gap between the brake pad and the inner wall of the outer brake ring through the oil injection hole, and the brake pad contacts the outer wall of the inner brake ring to achieve braking. Compared with disc brakes, this design increases the contact area, which is beneficial to improving the braking effect, and has the advantage of simple structure. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic cross-sectional view of the A-axis provided for an embodiment of this specification;

[0021] Figure 2 Provided for the embodiments of this specification Figure 1 Enlarged view of part A in the middle;

[0022] Figure 3 This is a half-sectional schematic diagram of the mandrel provided in the embodiments of this specification;

[0023] Figure 4 A-axis side view provided for embodiments of this specification;

[0024] Among them, 1-mandrel; 2-bearing; 3-outer ring of pressure bearing; 4-inner ring of pressure bearing; 5-outer shell; 6-outer ring of brake; 61-tooth structure; 7-inner ring of brake; 8-outer sleeve; 9-inner sleeve; 10-connecting plate; 11-rear cover; 12-flange. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figures 1-2 As shown in Figure 4, this embodiment of the specification provides an A-axis braking structure, including: an inner brake ring 7 and an outer brake ring 6. The inner brake ring 7 is fitted onto the outside of the spindle 1, and the outer brake ring 6 is fixedly installed and fitted onto the outside of the inner brake ring 7. A brake pad is also provided between the inner brake ring 7 and the outer brake ring 6, and the brake pad is connected to the inner wall of the outer brake ring 6. The outer brake ring 6 is provided with an oil injection hole for injecting oil into the gap between the brake pad and the inner wall of the outer brake ring 6. When braking of the A-axis is required, the hydraulic system injects oil into the gap between the brake pad and the inner wall of the outer brake ring 6 through the oil injection hole, and the brake pad contacts the outer wall of the inner brake ring 7 to achieve braking.

[0027] Working principle: During operation, the spindle 1 rotates, causing the bearing 2 and the inner brake ring 7 to rotate. When hydraulic oil is injected, it instantly fills the internal gap of the outer brake ring 6, causing deformation of the inner wall of the outer brake ring 6. This allows the inner wall of the outer brake ring 6 to contact the outer wall of the inner brake ring 7, thus achieving the braking effect. When the hydraulic oil returns to the hydraulic station, the inner wall of the outer brake ring 6 returns to its original shape, causing it to separate from the outer wall of the inner brake ring 7, and the spindle 1 continues to rotate.

[0028] The brake pad has an oil-locking structure on the side near the outer brake ring 6. The oil-locking structure is a raised structure, including a semi-circular raised structure.

[0029] The protruding structure is preferably a tooth-shaped structure 61. This design helps to increase the amount of oil locked, thereby increasing the deformation of the brake pads and improving the braking effect.

[0030] The oil injection hole is used to connect with the hydraulic system, which includes an oil pump and oil pipes. The oil pump is connected to the oil injection hole through the oil pipes and is used to inject oil into the gap between the brake pads and the inner wall of the brake outer ring 6, so that the brake pads contact the brake inner ring 7 and achieve braking.

[0031] The diameter of the mandrel 1 is 2 to 3 times the axial length, preferably 2.5 times. This configuration results in high strength and good rigidity for the mandrel 1.

[0032] The inner brake ring 7 and the outer brake ring 6 are made of carbon steel bars. Carbon steel bars have the advantages of dense structure and stable performance, which is beneficial to improving torque.

[0033] The structure also includes a fixed connection component, to which the outer brake ring 6 is connected, so that the outer brake ring 6 is fixedly positioned relative to the inner brake ring 7.

[0034] The fixed connection assembly includes an outer connection assembly and / or an inner connection assembly. The outer connection assembly is the outer shell 5. A part of the brake outer ring 6 is connected to the outer shell 5, and another part of the brake outer ring 6 is connected to the inner connection assembly, thereby fixing the brake outer ring 6.

[0035] The mandrel 1 has an internal cavity. The internal connecting assembly includes a connecting plate 10, an inner sleeve 9, and an outer sleeve 8. Both the inner sleeve 9 and the outer sleeve 8 are located inside the cavity. The inner sleeve 9 is fixedly installed, and the outer sleeve 8 is fitted over the inner sleeve 9. The mandrel 1 is detachably connected to the outer sleeve 8 from its end face via a flange 12. Figure 4 As shown. One end of the connecting plate 10 is connected to the inner sleeve 9, and the other end of the connecting plate 10 is connected to another part of the brake outer ring 6. The inner sleeve 9 is provided with a lubricating oil passage, through which lubricating oil can be introduced between the inner sleeve 9 and the outer sleeve 8; a sealing ring is also provided between the inner sleeve 9 and the outer sleeve 8 to prevent lubricating oil leakage. The inner sleeve 9 and the outer sleeve 8 are provided with coolant passages, through which coolant can be introduced into the spindle 1.

[0036] This specification also provides an A-axis, including the aforementioned A-axis braking structure, a bearing assembly, a spindle 1, and a rear cover 11. The spindle 1 is connected to the outer housing 5 via the bearing assembly. The rear cover 11 is connected to the end face of the outer housing 5 away from the bearing assembly. The bearing assembly includes a pressure bearing outer ring 3, a bearing 2, and a pressure bearing inner ring 4. The bearing 2 is sleeved outside the spindle 1, and the outer housing 5 is sleeved outside the bearing 2. The pressure bearing outer ring 3 is disposed on the outer housing 5, and the pressure bearing inner ring 4 is disposed on the spindle 1. The pressure bearing outer ring 3 and pressure bearing inner ring 4 are used to axially limit the bearing 2 and prevent axial movement of the bearing 2. Figure 3 As shown, the spindle 1 is preferably a stepped shaft structure, which facilitates the installation of bearing assemblies.

[0037] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple; relevant parts can be referred to the method section.

[0038] This document uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. Furthermore, those skilled in the art will recognize that, based on the ideas of this utility model, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An A-axis braking structure, characterized in that, include: The system includes an inner brake ring and an outer brake ring. The inner brake ring is fitted onto the outside of the spindle. The outer brake ring is fixedly installed and fitted onto the outside of the inner brake ring. A brake pad is provided between the inner and outer brake rings. The brake pad is connected to the inner wall of the outer brake ring. The outer brake ring has an oil injection hole for injecting oil into the gap between the brake pad and the inner wall of the outer brake ring.

2. The A-axis brake structure according to claim 1, characterized by The brake pad has an oil-locking structure on the side near the outer ring of the brake, and the oil-locking structure is a raised structure.

3. The A-axis brake structure according to claim 2, wherein The protruding structure is a tooth-shaped structure.

4. The A-axis brake structure of claim 1, wherein The oil injection port is used to communicate with a hydraulic system, which includes an oil pump and an oil pipe. The oil pump is connected to the oil injection port through the oil pipe.

5. The A-axis brake structure of claim 1, wherein The diameter of the mandrel is 2 to 3 times its axial length.

6. The A-axis brake structure of claim 1, wherein The inner brake ring and the outer brake ring are made of carbon steel bars.

7. The A-axis brake structure of claim 1, wherein It also includes a fixed connection assembly, to which the brake outer ring is connected.

8. The A-axis brake structure of claim 7, wherein The fixed connection assembly includes an outer connection assembly and / or an inner connection assembly. The outer connection assembly is a housing. A portion of the brake outer ring is connected to the housing, and another portion of the brake outer ring is connected to the inner connection assembly.

9. The A-axis brake structure of claim 8, wherein The mandrel has an internal cavity. The inner connecting assembly includes a connecting plate, an inner sleeve, and an outer sleeve. Both the inner sleeve and the outer sleeve are disposed within the cavity. The inner sleeve is fixedly disposed, and the outer sleeve is fitted over the inner sleeve. The inner sleeve and the outer sleeve are rotatably connected. The outer sleeve is connected to the mandrel via a flange. One end of the connecting plate is connected to the inner sleeve, and the other end of the connecting plate is connected to another part of the brake outer ring.

10. An A-axis characterized in that, The device includes the A-axis brake structure as described in claim 8 or 9, a bearing assembly, the spindle, and a rear cover, wherein the spindle is connected to the housing via the bearing assembly, and the rear cover is connected to the end face of the housing away from the bearing assembly.

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