Hydraulic oil cylinder brake structure and machine tool

Abstract

The utility model discloses a hydraulic oil cylinder brake structure and a machine tool, and belongs to the field of machine tools, the hydraulic oil cylinder brake structure comprises a shell, a transmission shaft rotatably installed in the shell, a bearing seat, an elastic piece, a piston assembly, a movable brake pad and a fixed brake pad, the bearing seat is fixed on the shell and provided with a cavity, and the piston assembly is movably installed in the cavity. The elastic piece abuts against the piston assembly, the movable brake pad is fixed to the transmission shaft, the fixed brake pad is located between the movable brake pad and the piston assembly, oil enters the cavity to push the piston assembly to make the piston assembly abut against the fixed brake pad, the fixed brake pad abuts against the movable brake pad to make the transmission shaft stop rotating, and through the design, hydraulic driving is adopted, machining and manufacturing are convenient, and cost is low.

Description

Technical Field

[0001] The utility model relates to the field of machine tools, in particular to a hydraulic oil cylinder brake structure and a machine tool. Background Art

[0002] Turning-milling compound machining centers are widely used in CNC machine tools. When turning, the workpiece is driven to rotate by the turning-milling compound turntable for processing. When milling, the turning-milling compound turntable is in a braking state, fixing the workpiece to stop it from rotating, and the workpiece is processed by the rotation of the tool.

[0003] Most existing swing milling heads use pneumatic clamp brake structures, but they are expensive and cannot achieve large braking torque. With the rapid development and industrial upgrading of the CNC machine tool industry, the market has higher and higher requirements for the cost performance and production cycle of swing heads, and the pneumatic clamp brake structure can no longer meet the needs of various industries. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, one of the purposes of the utility model is to provide a hydraulic cylinder brake structure that uses hydraulic oil to drive a piston to achieve the fitting of a static brake pad and a dynamic brake pad, achieves braking through friction resistance, is easy to process and manufacture, and has low cost.

[0005] In order to overcome the shortcomings of the prior art, the second purpose of the utility model is to provide a machine tool that uses hydraulic oil to drive a piston to achieve the fitting of a static brake pad and a dynamic brake pad, achieves braking through friction resistance, is easy to process and manufacture, and has low cost.

[0006] One of the purposes of the utility model is achieved by the following technical solution:

[0007] A hydraulic cylinder brake structure comprises a housing, a transmission shaft rotatably mounted inside the housing, a bearing seat, an elastic member, a piston assembly, a dynamic brake pad and a fixed brake pad, wherein the bearing seat is fixed to the housing, the bearing seat is provided with a cavity, the piston assembly is movably mounted in the cavity, the elastic member abuts against the piston assembly, the dynamic brake pad is fixed to the transmission shaft, the fixed brake pad is located between the dynamic brake pad and the piston assembly, oil entering the cavity pushes the piston assembly so that the piston assembly abuts against the fixed brake pad, and the fixed brake pad abuts against the dynamic brake pad to stop the rotation of the transmission shaft.

[0008] Furthermore, the piston assembly includes a piston body and a sealing ring, the piston body is located in the cavity, the elastic member abuts against the piston body, and the sealing ring is located between the outer wall of the piston body and the inner wall of the cavity.

[0009] Furthermore, the sealing ring is an O-ring.

[0010] Furthermore, there are two sealing rings, which are arranged in parallel.

[0011] Furthermore, the piston assembly also includes a pin, which is fixed to the piston body, and the elastic member is sleeved on the pin.

[0012] Furthermore, the hydraulic cylinder brake structure also includes a brake disc, the brake disc is provided with an installation space, and the elastic member is located in the installation space.

[0013] Furthermore, the hydraulic cylinder brake structure also includes a fastening assembly, and the dynamic brake pad is fixed to the transmission shaft through the fastening assembly.

[0014] Furthermore, the fastening assembly includes a fastener and an adjustment pad, the adjustment pad is located between the dynamic brake pad and the transmission shaft, and the fastener extends into the dynamic brake pad and the adjustment pad and cooperates with the transmission shaft.

[0015] Furthermore, the housing is provided with an oil drain channel, and the hydraulic cylinder brake structure also includes a one-way valve, which is installed in the oil drain channel.

[0016] The second purpose of the utility model is achieved by the following technical solution:

[0017] A machine tool comprises any one of the hydraulic cylinder brake structures described above.

[0018] Compared with the prior art, the hydraulic cylinder brake structure of the utility model includes a shell, a transmission shaft rotatably installed inside the shell, a bearing seat, an elastic member, a piston assembly, a dynamic brake pad and a fixed brake pad. The bearing seat is fixed to the shell, the bearing seat is provided with a cavity, the piston assembly is movably installed in the cavity, the elastic member abuts the piston assembly, the dynamic brake pad is fixed to the transmission shaft, the fixed brake pad is located between the dynamic brake pad and the piston assembly, the oil entering the cavity pushes the piston assembly so that the piston assembly abuts the fixed brake pad, and the fixed brake pad abuts against the dynamic brake pad to stop the transmission shaft from rotating. Through the above design, hydraulic drive is adopted, the processing and manufacturing are convenient, and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the hydraulic cylinder brake structure of the utility model;

[0020] Figure 2 for Figure 1 An enlarged view of the hydraulic cylinder brake structure A.

[0021] In the figure: 10, shell; 11, main body; 110, oil drain channel; 12, cover plate; 20, bearing seat; 21, cavity; 30, brake disc; 31, installation space; 40, transmission shaft; 50, fastening assembly; 51, fastener; 52, adjustment pad; 60, elastic member; 70, piston assembly; 71, piston body; 72, pin; 73, sealing ring; 80, dynamic brake pad; 90, fixed brake pad; 100, one-way valve. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be another intermediate component through which it is fixed. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be another intermediate component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be another intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0025] See also Figure 1 to Figure 2 The utility model discloses a hydraulic cylinder brake structure including a housing 10, a bearing seat 20, a brake disc 30, a transmission shaft 40, a fastening assembly 50, an elastic member 60, a piston assembly 70, a dynamic brake pad 80, a fixed brake pad 90 and a one-way valve 100.

[0026] The housing 10 includes a main body 11 and a cover plate 12 fixed to the main body 11, and the cover plate 12 is fixed to one side of the main body 11. The main body 11 is a hollow structure, and the bearing seat 20, the brake disc 30, the transmission shaft 40, the fastening assembly 50, the elastic member 60, the piston assembly 70, the dynamic brake pad 80, the fixed brake pad 90 and the one-way valve 100 are installed inside the housing 10. The main body 11 is provided with an oil drain channel 110, which is located at the lowest point of the main body 11 and at the corner, and the oil drain channel 110 runs through the side wall of the main body 11. The one-way valve 100 is installed in the oil drain channel 110. When the hydraulic oil in the cavity 21 of the bearing seat 20 leaks, the one-way valve 100 can discharge the leaked hydraulic oil, and the one-way design can prevent external dust and water from entering the housing 10.

[0027] The bearing seat 20 is fixed inside the main body 11. The bearing seat 20 is provided with a cavity 21, and the cavity 21 is used to install the piston body 71. The piston body 71 is driven to slide in the cavity 21 by the hydraulic oil.

[0028] The brake disc 30 is installed on the other side of the main body 11. The brake disc 30 is provided with an installation space 31, and the installation space 31 and the cavity 21 are in the same straight line, and the installation space 31 and the cavity 21 are communicated.

[0029] The transmission shaft 40 is rotatably installed inside the housing 10 .

[0030] The fastening assembly 50 includes a fastener 51 and an adjustment pad 52. The adjustment pad 52 is located between the dynamic brake pad 80 and the transmission shaft 40. The fastener 51 extends into the dynamic brake pad 80 and the adjustment pad 52 and cooperates with the transmission shaft 40 to fix the dynamic brake pad 80 to the transmission shaft 40. The adjustment pad 52 adjusts the distance between the dynamic brake pad 80 and the transmission shaft 40, and indirectly adjusts the distance between the dynamic brake pad 80 and the fixed brake pad 90, thereby adjusting the braking torque during braking. Specifically, in this embodiment, the fastener 51 is a nut.

[0031] The elastic member 60 is installed in the installation space 31, and one end of the elastic member 60 contacts the brake disc 30, and the other end contacts the piston body 71. When the piston body 71 loses the hydraulic pressure, the piston body 71 is reset under the elastic force of the elastic member 60, so that the fixed brake pad 90 is separated from the dynamic brake pad 80. Specifically, the elastic member 60 is a spring.

[0032] The piston assembly 70 includes a piston body 71, a pin 72 and a sealing ring 73. The pin 72 is fixed to one end of the piston body 71. The elastic member 60 is sleeved on the pin 72. The pin 72 guides the elastic member 60 to prevent the elastic member 60 from twisting and deforming. A sealing groove is provided on the side wall of the piston body 71. The sealing groove is used to install the sealing ring 73. The sealing ring 73 is located in the sealing groove and contacts the inner wall of the cavity 21 to achieve the seal between the piston body 71 and the bearing seat 20. Specifically, the sealing ring 73 is an O-ring. There are two sealing grooves, which are arranged in parallel to improve the sealing between the piston body 71 and the bearing seat 20.

[0033] The dynamic brake pad 80 is fixed to the transmission shaft 40. The dynamic brake pad 80 is located on a side of the installation space 31 close to the transmission shaft 40.

[0034] The fixed brake pad 90 is located between the movable brake pad 80 and the piston body 71 .

[0035] When the hydraulic cylinder brake structure is used, the hydraulic oil enters the cavity 21, pushing the piston body 71 close to the fixed brake pad 90, and the fixed brake pad 90 contacts the movable brake pad 80, so that the fixed brake pad 90 and the transmission shaft 40 stop rotating, thereby achieving braking. Through the above design, hydraulic drive is adopted, which is convenient to manufacture and has low cost.

[0036] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the utility model, several modifications and improvements can be made, which are equivalent modifications and improvements made to the above embodiments based on the essential technology of the utility model, and all of them belong to the protection scope of the utility model.

Claims

1. A hydraulic cylinder brake structure, comprising a housing and a transmission shaft rotatably mounted inside the housing, characterized in that: The hydraulic cylinder brake structure also includes a bearing seat, an elastic member, a piston assembly, a dynamic brake pad and a fixed brake pad. The bearing seat is fixed to the housing, the bearing seat is provided with a cavity, the piston assembly is movably installed in the cavity, the elastic member abuts against the piston assembly, the dynamic brake pad is fixed to the transmission shaft, the fixed brake pad is located between the dynamic brake pad and the piston assembly, the oil entering the cavity pushes the piston assembly so that the piston assembly abuts against the fixed brake pad, and the fixed brake pad abuts against the dynamic brake pad to stop the transmission shaft from rotating.

2. The hydraulic cylinder brake structure according to claim 1, characterized in that: The piston assembly comprises a piston body and a sealing ring. The piston body is located in the cavity. The elastic member abuts against the piston body. The sealing ring is located between the outer wall of the piston body and the inner wall of the cavity.

3. The hydraulic cylinder brake structure according to claim 2, characterized in that: The sealing ring is an O-ring.

4. The hydraulic cylinder brake structure according to claim 2, characterized in that: The number of the sealing rings is two, and the two sealing rings are arranged in parallel.

5. The hydraulic cylinder brake structure according to claim 2, characterized in that: The piston assembly also includes a pin, which is fixed to the piston body, and the elastic member is sleeved on the pin.

6. The hydraulic cylinder brake structure according to claim 1, characterized in that: The hydraulic cylinder brake structure also includes a brake disc, the brake disc is provided with an installation space, and the elastic member is located in the installation space.

7. The hydraulic cylinder brake structure according to claim 1, characterized in that: The hydraulic cylinder brake structure also includes a fastening assembly, and the dynamic brake pad is fixed to the transmission shaft through the fastening assembly.

8. The hydraulic cylinder brake structure according to claim 7, characterized in that: The fastening assembly includes a fastener and an adjustment pad, wherein the adjustment pad is located between the dynamic brake pad and the transmission shaft, and the fastener extends into the dynamic brake pad and the adjustment pad and cooperates with the transmission shaft.

9. The hydraulic cylinder brake structure according to claim 1, characterized in that: The housing is provided with an oil drain passage, and the hydraulic cylinder brake structure further comprises a one-way valve, which is installed in the oil drain passage.

10. A machine tool, characterized in that: The machine tool comprises a hydraulic cylinder brake structure as described in any one of claims 1-9.

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