Hydrostatic spindle brake control system

Abstract

The application discloses a hydrostatic spindle brake control system, which is used for controlling the hydrostatic spindle brake. The hydrostatic spindle brake control system comprises a brake mechanism, a control mechanism, an oil supply assembly and an air source assembly. The brake mechanism is connected with the hydrostatic spindle and is used for braking the hydrostatic spindle. The control mechanism comprises an air-liquid regulating valve, an oil-liquid regulating valve and a controller. The air-liquid regulating valve is arranged on an oil leakage channel, the controller controls the air-liquid regulating valve according to a control signal to make the oil leakage channel open or close, the oil-liquid regulating valve is arranged on an oil inlet channel, and the controller controls the oil-liquid regulating valve according to a signal to make the oil inlet channel open or close. The oil supply assembly is used for supplying oil to the oil-liquid regulating valve at least. The air source assembly is used for supplying air to the air-liquid regulating valve at least. The application solves the problem that the hydrostatic spindle is damaged when any of the hydraulic system or the air path system of the hydrostatic spindle in the prior art is damaged.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of machining tools, in particular to a hydrostatic spindle brake control system. BACKGROUND

[0002] The hydrostatic spindle has the advantages of long service life, high transmission efficiency and high rotation accuracy compared with the traditional spindle with rolling support, and is widely used in the field of ultra-high precision machining.

[0003] Since the hydrostatic spindle uses hydrostatic pressure as its supporting force, the hydrostatic spindle must start working in the presence of hydrostatic pressure. Once the hydrostatic system fails, the spindle must be quickly braked to avoid direct contact and friction between the hydrostatic bearing and the spindle core, causing damage to the spindle. At the same time, since the hydrostatic spindle works at a high speed, air is generally used as a sealing medium instead of a sealing ring, so once the hydrostatic spindle system lacks a certain pressure of air for sealing, the high-pressure liquid filled in the system will be sprayed out from the front and rear ends of the spindle, causing the spindle system to malfunction.

[0004] However, any damage to the hydraulic system or air path system of the hydrostatic spindle can cause mechanical collision between the spindle and the bearing, resulting in damage to the hydrostatic spindle. SUMMARY

[0005] The main purpose of the present application is to provide a hydrostatic spindle brake control system to at least solve the problem of damage to the hydrostatic spindle caused by any damage to the hydraulic system or air path system of the hydrostatic spindle in the prior art.

[0006] According to one aspect of the present application, a hydrostatic spindle brake control system for controlling the brake of a hydrostatic spindle is provided, comprising:

[0007] A brake mechanism, the brake mechanism comprising a base component, a rotating connection component and a brake assembly, the base component being provided with a mounting cavity, an oil inlet channel, an oil return channel and an oil discharge channel, the rotating connection component comprising a connecting portion and a first elastic element, the connecting portion being at least partially rotatably mounted in the mounting cavity and surrounding the connecting portion to form a hydraulic chamber, the oil inlet channel, the oil return channel and the oil discharge channel all communicating with the hydraulic chamber, the connecting portion extending to the outside of the mounting cavity, the first elastic element being mounted in the mounting cavity and abutting between the inner wall of the mounting cavity and the connecting portion, the brake assembly comprising a first friction portion and a second friction portion, the first friction portion being fixedly provided on the connecting portion, the second friction portion being fixedly provided on the base component, the first friction portion having a first position in contact with the second friction portion to lock the connecting portion, and a second position separated from the second friction portion.

[0008] The control mechanism comprises a gas-liquid regulating valve, an oil-liquid regulating valve and a controller, the gas-liquid regulating valve is arranged on the oil leakage passage, the controller controls the gas-liquid regulating valve according to a control signal to open or close the oil leakage passage, the oil-liquid regulating valve is arranged on the oil inlet passage, the controller controls the oil-liquid regulating valve according to a signal to open or close the oil inlet passage;

[0009] The oil supply assembly is used at least for supplying oil to the oil-liquid regulating valve;

[0010] The gas source assembly is used at least for supplying gas to the gas-liquid regulating valve.

[0011] Further, the gas-liquid regulating valve comprises a valve body, a valve core and a second elastic element, the valve body is provided with a receiving cavity, an oil leakage port, a gas inlet port and a gas leakage port, the valve core is movably arranged in the receiving cavity and forms an oil cavity and a gas pressure cavity with the receiving cavity, the gas leakage port and the gas inlet port are communicated with the gas pressure cavity, the oil leakage passage is communicated with the oil cavity, and the second elastic element is arranged between the inner wall of the oil cavity and the valve core;

[0012] The control mechanism further comprises a pressure relief valve communicated with the gas leakage port, and the gas source assembly is communicated with the gas inlet port;

[0013] The oil cavity has a first position in which the elastic force of the second elastic element overcomes the pressure of the gas pressure cavity to make the oil cavity communicated with the oil leakage port, and the oil cavity has a second position in which the pressure of the gas pressure cavity overcomes the elastic force of the second elastic element to make the oil cavity disconnected with the oil leakage port.

[0014] Further, the first elastic element comprises a disc spring group; and / or,

[0015] The second elastic element comprises a coil spring.

[0016] Further, the static pressure spindle comprises a static pressure cavity, the control mechanism further comprises a monitoring assembly electrically connected with the controller, the monitoring assembly is used at least for monitoring the gas pressure of the gas in the gas-liquid regulating valve and monitoring the hydraulic pressure of the oil in the static pressure cavity, and the controller controls the gas-liquid regulating valve and the oil-liquid regulating valve according to the signal transmitted by the monitoring assembly.

[0017] Further, an oil supply pipeline is arranged between the static pressure cavity and the oil supply assembly, and a gas supply pipeline is arranged between the gas source assembly and the gas-liquid regulating valve;

[0018] The monitoring assembly comprises an air pressure sensor and a hydraulic pressure sensor, the air pressure sensor is arranged on the air supply pipeline, the hydraulic pressure sensor is arranged on the oil supply pipeline, and the air pressure sensor and the hydraulic pressure sensor are electrically connected with the controller.

[0019] Further, the base component comprises a base plate, a shaft sleeve and a cover plate, two ends of the shaft sleeve are connected with the base plate and the cover plate respectively, and the base plate, the shaft sleeve and the cover plate surround to form the mounting cavity.

[0020] The connecting part comprises a hydraulic shaft core, a cover assembly and a shaft coupling, the hydraulic shaft core is partially arranged in the mounting cavity, the cover assembly and the shaft coupling are sequentially fixed and connected on the hydraulic shaft core in the direction away from the mounting cavity, and the shaft coupling is further connected with the static pressure spindle.

[0021] The first friction part is arranged on the side of the cover assembly close to the base plate, and the second friction part is arranged on the side of the base plate close to the cover assembly.

[0022] Further, an annular outer flange is arranged on the end of the hydraulic shaft core close to the hydraulic cavity, an annular air-tight sealing cavity is arranged on the outer periphery of the annular outer flange, one end of the first elastic element abuts against the annular outer flange, and the other end of the first elastic element abuts against the cover plate.

[0023] Further, the cover assembly comprises an annular cover body and an end plate, the annular cover body covers the outer periphery of the shaft sleeve, and a plurality of bearing assemblies are arranged between the shaft sleeve and the annular cover body.

[0024] Further, the bearing assembly comprises at least one of a roller bearing, a needle bearing, a tapered roller bearing and a thrust bearing.

[0025] Further, the first friction part and / or the second friction part comprises a friction plate

[0026] Compared with the prior art, the static pressure spindle brake control system can quickly brake the static pressure spindle through the brake mechanism and the control mechanism when the hydraulic system or the air path system of the static pressure spindle is damaged, so as to avoid mechanical collision between the shaft body of the static pressure spindle and the bearing, and damage to the static pressure spindle. BRIEF DESCRIPTION OF DRAWINGS

[0027] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and serve to explain the principles of the application, and do not limit the application in any way. In the drawings:

[0028] Fig. 1A structural schematic diagram of a brake control system of a static pressure spindle disclosed in the application;

[0029] Fig. 2 A structural schematic diagram of a brake mechanism disclosed in the application;

[0030] Fig. 3 A structural schematic diagram of a gas-liquid regulating valve disclosed in the application.

[0031] In the above drawings, the following reference signs are used:

[0032] 11, base part; 12, rotary connecting part; 13, brake assembly; 21, gas-liquid regulating valve; 22, pressure relief valve; 30, bearing assembly; 40, static pressure spindle; 41, static pressure cavity; 42, high-pressure gas seal cavity; 111, base plate; 112, shaft sleeve; 113, cover plate; 114, hydraulic cavity; 115, annular gas seal cavity; 121, first elastic element; 122, connecting part; 131, first friction part; 132, second friction part; 211, valve body; 212, valve core; 213, second elastic element; 1111, oil inlet channel; 1112, oil return channel; 1113, oil discharge channel; 1221, hydraulic shaft core; 1222, cover assembly; 1223, annular cover body; 1224, end plate; 1225, shaft coupling; 1226, annular outer flange; 2111, accommodating cavity; 2112, oil discharge port; 2113, gas inlet port; 2114, gas discharge port; 2115, oil cavity; 2116, gas pressure cavity; 2121, oil passing channel. DETAILED DESCRIPTION

[0033] It should be noted that the embodiments and features in the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with embodiments.

[0034] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that, when the terms "comprise" and / or "include" are used in the specification, there is a presence of a feature, step, operation, device, component and / or combination thereof.

[0035] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples herein are not intended to limit the scope of the present application unless specifically stated otherwise. Also, it is to be understood that the dimensions of the various parts shown in the drawings are not drawn to scale for the sake of convenience. Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail herein. However, where appropriate, techniques, methods, and devices should be considered part of the present application. In all examples shown and discussed herein, any specific value is to be interpreted as merely an example and not a limitation. Thus, other examples of the example embodiments can have different values. It is to be noted that like reference numerals and letters refer to like items in the drawings, and thus, once an item is defined in one drawing, it need not be discussed further in subsequent drawings.

[0036] Referring to Figs. 1-3 As shown, according to the embodiments of the present application, a hydrostatic spindle brake control system is provided for controlling the hydrostatic spindle 40 brake. The hydrostatic spindle brake control system comprises a brake mechanism, a control mechanism, an oil supply assembly (not shown in the figure) and a gas source assembly (not shown in the figure).

[0037] The brake mechanism comprises a base part 11, a rotary connecting part 12 and a brake assembly 13. The base part 11 is provided with a mounting cavity, an oil inlet passage 1111, an oil return passage 1112 and an oil discharge passage 1113. The rotary connecting part 12 comprises a connecting part 122 and a first elastic element 121. The connecting part 122 is at least partially rotatably mounted in the mounting cavity and forms a hydraulic cavity 114 around the rotary connecting part 12. The oil inlet passage 1111, the oil return passage 1112 and the oil discharge passage 1113 are all in communication with the hydraulic cavity 114. The connecting part 122 extends to the outside of the mounting cavity. The first elastic element 121 is mounted in the mounting cavity and is respectively abutted between the inner wall of the mounting cavity and the connecting part 122. The brake assembly 13 comprises a first friction part 131 and a second friction part 132. The first friction part 131 is fixedly arranged on the connecting part 122. The second friction part 132 is fixedly arranged on the base part 11. The first friction part 131 has a first position in contact with the second friction part 132 to lock the connecting part 122, and a second position separated from the second friction part 132. The control mechanism comprises a gas-liquid regulating valve 21, an oil regulating valve (not shown in the figure) and a controller (not shown in the figure). The gas-liquid regulating valve 21 is arranged on the oil discharge passage 1113. The controller controls the gas-liquid regulating valve 21 according to a control signal to open or close the oil discharge passage 1113. The oil regulating valve is arranged on the oil inlet passage 1111. The controller controls the oil regulating valve according to a signal to open or close the oil inlet passage 1111. The oil supply assembly is at least used for supplying oil to the oil regulating valve. The gas source assembly is at least used for supplying gas to the gas-liquid regulating valve 21.

[0038] When the static pressure spindle 40 is working normally, i.e., the oil circuit system and the gas circuit system in the static pressure spindle 40 are normal, the brake mechanism is fixedly connected to one side of the static pressure spindle 40. At this time, the oil adjusting valve is opened, the oil enters the hydraulic chamber 114 through the oil inlet channel 1111 to exert a pushing force on the connecting part 122, so that the rotating connecting part 12 moves as a whole in a direction away from the base part 11, and the first elastic element 121 is compressed under the pressure of the connecting part 122. When the static pressure spindle 40 fails or cannot work normally, the pressure of the oil in the hydraulic chamber 114 is less than the elastic force of the first elastic element 121 by opening the pressure relief channel or closing the oil adjusting valve, and then the first elastic element 121 is retracted, so that the rotating connecting part 12 moves in a direction close to the base part 11, and the first friction part 131 and the second friction part 132 rub, so that the static pressure spindle 40 is quickly stopped.

[0039] In this embodiment, the static pressure spindle brake control system can brake through the oil adjusting valve and the gas-liquid adjusting valve 21 respectively. Specifically, when the control system monitors that the oil circuit system of the static pressure spindle 40 fails or is damaged, the control system controls the oil adjusting valve through the controller, the oil adjusting valve closes the oil inlet channel 1111, the oil in the hydraulic chamber 114 flows out from the oil return channel 1112, so that the connecting part 122 moves in a direction close to the hydraulic chamber 114, and finally causes the first friction part 131 and the second friction part 132 to rub, so that the rotating connecting part 12 and the static pressure spindle 40 connected with the rotating connecting part 12 stop rotating, thereby avoiding the problem that when the oil circuit system of the static pressure spindle 40 fails, the static pressure spindle 40 cannot be stopped in time and is damaged.

[0040] In addition, when the control system monitors that the gas circuit system of the static pressure spindle 40 fails, the gas circuit system feeds back through the gas-liquid adjusting valve 21. Specifically, the gas circuit system of the static pressure spindle 40 is usually damaged on the gas source assembly, i.e., the gas source assembly cannot provide sufficient gas flow pressure to the static pressure spindle 40 or cannot work normally. In this embodiment, the gas source assembly supplies gas to the gas-liquid adjusting valve 21 and the high-pressure gas-tight sealing chamber 42 in the static pressure spindle 40 at the same time, and the pressure provided is the same. When the gas pressure in the gas-liquid adjusting valve 21 is lower than a certain value, it indicates that the gas-tight sealing chamber of the static pressure spindle 40 cannot work normally. At this time, the controller sends a signal to the gas-liquid adjusting valve 21 to open the oil discharge channel 1113, so that the oil in the hydraulic chamber 114 flows out through the oil discharge channel 1113, so that the first friction part 131 and the second friction part 132 rub, and finally the static pressure spindle 40 is quickly stopped.

[0041] Further, the gas-liquid regulating valve 21 comprises a valve body 211, a valve core 212 and a second elastic element 213. The valve body 211 is provided with a receiving cavity 2111, an oil discharge port 2112, an air inlet 2113 and an air outlet 2114. The valve core 212 is movably arranged in the receiving cavity 2111 and forms an oil cavity 2115 and an air cavity 2116 with the receiving cavity 2111. The air outlet 2114 and the air inlet 2113 are both in communication with the air cavity 2116. The oil discharge channel 1113 is in communication with the oil cavity 2115. The second elastic element 213 is arranged between the inner wall of the oil cavity 2115 and the valve core 212. The control mechanism further comprises a pressure relief valve 22 which is in communication with the air outlet 2114. The air source assembly is in communication with the air inlet 2113. The oil cavity 2115 has a first position in which the elastic force of the second elastic element 213 overcomes the pressure of the air cavity 2116 to make the oil cavity 2115 in communication with the oil discharge port 2112. The oil cavity 2115 also has a second position in which the pressure of the air cavity 2116 overcomes the elastic force of the second elastic element 213 to make the oil cavity 2115 disconnected from the oil discharge port 2112.

[0042] Specifically, a groove is formed on the outer circumferential surface of the valve core 212. The groove is in abutment with the inner wall surface of the receiving cavity 2111 and forms the oil cavity 2115. The end surface of one end of the valve core 212 and the inner wall surface of the receiving cavity 2111 form the air cavity 2116. In addition, an oil passing channel 2121 is formed on the valve core 212. The two ends of the oil passing channel 2121 are in communication with the oil discharge channel 1113 and the oil cavity 2115, respectively. A sealing groove is formed on the valve core 212 and a sealing ring is arranged in the sealing groove to ensure the sealing of the oil cavity 2115 and the air cavity 2116. When the static pressure spindle 40 does not need to be rapidly braked, the pressure relief valve 22 is closed. The airflow in the air cavity 2116 pushes the valve core 212 to move away from the air outlet 2114. The valve core 212 drives the second elastic element 213 to compress and makes the oil cavity 2115 disconnected from the oil discharge port 2112. When the static pressure spindle 40 needs to be rapidly braked, the controller sends a signal to the pressure relief valve 22 to make the pressure relief valve 22 open. The air pressure in the air cavity 2116 decreases. The second elastic element 213 retracts and drives the valve core 212 to move towards the air outlet 2114. Finally, the oil cavity 2115 is connected to the oil discharge port 2112.

[0043] Furthermore, the first elastic element 121 includes a disc spring assembly. In this embodiment, since the pressure on the connecting portion 122 is relatively large, a disc spring assembly is selected for the first elastic element 121 to ensure long-term use and good rebound effect. Optionally, the second elastic element 213 includes a helical spring. The oil leakage in the gas-liquid regulating valve 21 mainly relies on the air pressure regulation in the air pressure chamber 2116, and the second elastic element 213 does not need to provide a large elastic force. Therefore, a lower-cost helical spring is selected for the second elastic element 213.

[0044] Furthermore, the hydrostatic spindle 40 includes a hydrostatic chamber 41, and the control mechanism also includes a monitoring component (not shown in the figure). The monitoring component is electrically connected to the controller. The monitoring component is used to monitor at least the gas pressure in the gas-liquid regulating valve 21 and the hydraulic pressure of the oil in the hydrostatic chamber 41. The controller controls the gas-liquid regulating valve 21 and the oil regulating valve according to the signal transmitted by the monitoring component.

[0045] Specifically, the monitoring component continuously sends monitoring data to the controller, which then judges the hydraulic or pneumatic system of the hydrostatic spindle 40 based on the set oil and hydraulic ranges. If the monitored value exceeds the set oil or hydraulic range, it is determined that the hydraulic or pneumatic system has malfunctioned. The controller then sends a signal to the corresponding oil or pneumatic regulating valve 21 to enable the hydrostatic spindle brake control system to quickly brake the hydrostatic spindle 40.

[0046] Furthermore, the hydrostatic spindle 40 includes a hydrostatic chamber 41, with an oil supply pipe (not shown in the figure) between the hydrostatic chamber 41 and the oil supply assembly, and an air supply pipe (not shown in the figure) between the air source assembly and the air-liquid regulating valve 21. The monitoring assembly includes a pneumatic pressure sensor and a hydraulic pressure sensor. The pneumatic pressure sensor is installed on the air supply pipe, and the hydraulic pressure sensor is installed on the oil supply pipe. Both the pneumatic pressure sensor and the hydraulic pressure sensor are electrically connected to the controller.

[0047] Specifically, the oil supply assembly supplies oil to the static pressure cavity 41. Since the oil in the static pressure cavity 41 exerts a counterforce on the oil in the oil supply pipeline, the oil pressure in the static pressure cavity 41 can be determined by monitoring the oil pressure in the oil supply pipeline. In addition, the static pressure spindle 40 is also provided with a high-pressure gas seal cavity 42. The high-pressure gas seal cavity 42 is used to isolate the oil in the static pressure cavity 41 to prevent the oil from flowing out of the static pressure spindle 40. When the pressure in the high-pressure gas seal cavity 42 is insufficient, the oil flows out of the static pressure spindle 40, causing the static pressure spindle 40 to malfunction. The gas supply assembly supplies gas to the high-pressure gas seal cavity 42 of the static pressure spindle 40, and the gas supply assembly provides the same gas pressure to the gas-liquid regulating valve 21 and the static pressure spindle 40. Therefore, the gas pressure in the static pressure spindle 40 can be determined by monitoring the gas pressure in the gas supply pipeline. In a specific embodiment, the pressure relief valve 22 is a reversing valve. When the controller receives the signal from the gas pressure sensor and the gas pressure is abnormal, the controller sends a reversing command to the reversing valve, and the reversing valve opens to allow the gas to flow out of the gas pressure cavity 2116. In another specific embodiment, the predetermined gas pressure range is greater than or equal to 0.6 Mpa. That is, when the gas pressure sensor detects a gas pressure less than 0.6 Mpa, the static pressure spindle brake control system starts to work. It is worth mentioning that the high-pressure gas seal cavity 42 is a cavity between the shaft body and the bearing of the static pressure spindle 40. Since the shaft body and the bearing have high rigidity, the high-pressure gas seal cavity 42 is almost impossible to fail, so the gas circuit system of the static pressure spindle 40 is mostly damaged on the gas source assembly.

[0048] As shown in the accompanying drawings, Fig. 1 The base member 11 includes a base plate 111, a shaft sleeve 112, and a cover plate 113. The two ends of the shaft sleeve 112 are connected to the base plate 111 and the cover plate 113, respectively, and the base plate 111, the shaft sleeve 112, and the cover plate 113 form an installation cavity. The connecting part 122 includes a hydraulic shaft core 1221, an outer cover assembly 1222, and a coupling 1225. The hydraulic shaft core 1221 is partially arranged in the installation cavity. Along the direction away from the installation cavity, the hydraulic shaft core 1221 is sequentially fixedly connected with the outer cover assembly 1222 and the coupling 1225. The coupling 1225 is also connected with the static pressure spindle 40. The first friction part 131 is arranged on the side of the outer cover assembly 1222 close to the base plate 111, and the second friction part 132 is arranged on the side of the base plate 111 close to the outer cover assembly.

[0049] Specifically, in the embodiment, the substrate 111, the shaft sleeve 112 and the cover plate 113 are connected by the fixing member, and the cover plate 113 is provided with a relief hole, and the hydraulic shaft core 1221 is arranged in the mounting cavity through the relief hole. The shaft coupling 1225 is used to connect the hydraulic shaft core 1221 and the static pressure spindle 40, so as to brake the static pressure spindle 40. When the static pressure spindle brake control system is not working, the hydraulic shaft core 1221 moves away from the hydraulic cavity 114, and rotates under the drive of the static pressure spindle 40. At the same time, the outer cover assembly 1222 and the first friction part 131 rotate synchronously under the drive of the hydraulic shaft core 1221. When the static pressure spindle brake control system works, the hydraulic shaft core 1221 moves towards the hydraulic cavity 114, and then the first friction part 131 contacts and rubs with the second friction part 132, so that the outer cover assembly 1222, the hydraulic shaft core 1221 and the static pressure spindle 40 stop rotating.

[0050] In addition, the one end of the hydraulic shaft core 1221 close to the hydraulic cavity 114 is provided with an annular outer flange 1226, and the outer periphery of the annular outer flange 1226 is provided with an annular air-tight sealing cavity 115, and one end of the first elastic element 121 abuts against the annular outer flange 1226, and the other end of the first elastic element 121 abuts against the cover plate 113.

[0051] In the embodiment, the annular outer flange 1226 can provide the first elastic element 121 with elastic force to the hydraulic shaft core 1221, and the annular air-tight sealing cavity 115 on the annular outer flange 1226 is used to avoid the oil in the hydraulic cavity 114 from entering the mounting cavity and polluting the hydraulic shaft core 1221 and the first elastic element 121.

[0052] Further, the outer cover assembly 1222 comprises an annular cover body 1223 and an end plate 1224, the annular cover body 1223 covers the outer periphery of the shaft sleeve 112, and a plurality of bearing assemblies 30 are arranged between the shaft sleeve 112 and the annular cover body 1223.

[0053] Specifically, the annular cover body 1223 and the end plate 1224 are fixedly connected, the annular cover body 1223 is used to protect the shaft sleeve 112 from the influence of the external environment. At the same time, a plurality of bearing assemblies 30 are arranged between the annular cover body 1223 and the shaft sleeve 112, which can reduce the friction force between the annular cover body 1223 and the shaft sleeve 112 on the one hand, and effectively reduce the impact force between the annular cover body 1223 and the shaft sleeve 112 on the other hand.

[0054] Further, the bearing assembly 30 comprises at least one of a roller bearing, a needle bearing, a tapered roller bearing and a thrust bearing. In one embodiment, the bearing assembly 30 comprises a roller bearing, a needle bearing, a tapered roller bearing and a thrust bearing, and is arranged on different contact surfaces of the annular cover 1223 and the shaft sleeve 112 respectively, so as to improve the load bearing capacity of the contact surfaces of the annular cover 1223 and the shaft sleeve 112.

[0055] Further, the first friction part 131 and / or the second friction part 132 comprises a friction plate. In the embodiment, the first friction part 131 and the second friction part 132 are both disc-shaped friction plates, so as to increase the contact surface between the first friction part 131 and the second friction part 132, thereby ensuring that the static pressure spindle 40 can be braked quickly.

[0056] For the purposes of the description hereinafter, the terms "upper", "bottom", "lower", "over", "under", and "on" as may be used herein, such as in reference to one structure or feature being on or above another structure or feature, relate to the structure or feature being described and / or illustrated as oriented in use or operation. For example, when a structure or feature is referred to as being "above" or "on" another structure or feature, it can be oriented in use or operation such that the former is above or on the latter. Thus, as the structure or feature can be oriented in other manners (e.g., rotated 90 degrees or at other orientations), the directional terms used herein are intended to encompass all such orientations of the structure or feature. The structure or feature can also be oriented in other manners (e.g., rotated 90 degrees or at other orientations) and the included directional terms are to be interpreted accordingly.

[0057] In addition, it should be noted that the use of "first", "second", and the like herein does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Unless otherwise stated, the terms do not have special meanings and should not be construed as limiting the scope of the present application.

[0058] The preferred embodiments of the present application have been described above with the aid of a number of drawings. These embodiments are illustrative only and not intended to limit the scope of the application. Changes and modifications can be suggested to one skilled in the art, and it is intended to encompass such changes and modifications within the scope of the present application.

Claims

1. A hydrostatic spindle brake control system for controlling a hydrostatic spindle (40) brake, characterized by, The brake mechanism comprises a base part (11), a rotating connecting part (12) and a brake assembly (13), the base part (11) is provided with a mounting cavity, an oil inlet channel (1111), an oil return channel (1112) and an oil discharge channel (1113), the rotating connecting part (12) comprises a connecting part (122) and a first elastic element (121), the connecting part (122) is at least partially rotatably mounted in the mounting cavity and forms a hydraulic cavity (114) around the rotating connecting part (12), the oil inlet channel (1111), the oil return channel (1112) and the oil discharge channel (1113) all communicate with the hydraulic cavity (114), the connecting part (122) extends to the outside of the mounting cavity, and the first elastic element (121) is mounted in the mounting cavity and abuts between the inner wall of the mounting cavity and the connecting part (122), the brake assembly (13) comprises a first friction part (131) and a second friction part (132), the first friction part (131) is fixedly arranged on the connecting part (122), the second friction part (132) is fixedly arranged on the base part (11), the first friction part (131) has a first position in contact with the second friction part (132) to lock the connecting part (122) and a second position separated from the second friction part (132); The control mechanism comprises a gas-liquid regulating valve (21), an oil regulating valve and a controller, the gas-liquid regulating valve (21) is arranged on the oil discharge channel (1113), the controller controls the gas-liquid regulating valve (21) according to a control signal to open or close the oil discharge channel (1113), the oil regulating valve is arranged on the oil inlet channel (1111), and the controller controls the oil regulating valve according to a signal to open or close the oil inlet channel (1111); The oil supply assembly is used at least for supplying oil to the oil regulating valve; The gas source assembly is used at least for supplying gas to the gas-liquid regulating valve (21). The gas-liquid regulating valve (21) comprises a valve body (211), a valve core (212) and a second elastic element (213), the valve body (211) is provided with a containing cavity (2111), an oil discharge port (2112), an air inlet port (2113) and an air discharge port (2114), the valve core (212) is movably arranged in the containing cavity (2111) and forms an oil cavity (2115) and an air pressure cavity (2116) with the containing cavity (2111), the air discharge port (2114) and the air inlet port (2113) both communicate with the air pressure cavity (2116), the oil discharge channel (1113) communicates with the oil cavity (2115), and the second elastic element (213) abuts between the inner wall of the oil cavity (2115) and the valve core (212).

2. The hydrostatic spindle brake control system of claim 1, wherein, ​ The control mechanism further comprises a pressure relief valve (22) in communication with the air outlet (2114), and the air source assembly is in communication with the air inlet (2113); The oil cavity (2115) has a first position in which the oil cavity (2115) is in communication with the oil outlet (2112) under the elastic force of the second elastic element (213) overcoming the pressure of the gas pressure cavity (2116), and a second position in which the oil cavity (2115) is disconnected from the oil outlet (2112) under the pressure of the gas pressure cavity (2116) overcoming the elastic force of the second elastic element (213).

3. The hydrostatic spindle brake control system of claim 2, wherein, The first elastic element (121) comprises a disc spring group; and / or, The second elastic element (213) comprises a coil spring.

4. The hydrostatic spindle brake control system of claim 1, wherein, The hydrostatic spindle (40) comprises a hydrostatic cavity (41), and the control mechanism further comprises a monitoring assembly electrically connected to the controller, which is used to monitor the gas pressure of the gas in the gas-liquid regulating valve (21) and the liquid pressure of the oil in the hydrostatic cavity (41), and the controller controls the gas-liquid regulating valve (21) and the oil regulating valve according to the signals transmitted by the monitoring assembly.

5. The hydrostatic spindle brake control system of claim 4, wherein, An oil supply pipeline is arranged between the oil supply assembly and the hydrostatic cavity (41), and a gas supply pipeline is arranged between the air source assembly and the gas-liquid regulating valve (21); The monitoring assembly comprises a gas pressure sensor and a liquid pressure sensor, the gas pressure sensor is arranged on the gas supply pipeline, the liquid pressure sensor is arranged on the oil supply pipeline, and the gas pressure sensor and the liquid pressure sensor are electrically connected to the controller.

6. The hydrostatic spindle brake control system of claim 1, wherein, The base component (11) comprises a base plate (111), a shaft sleeve (112) and a cover plate (113), both ends of the shaft sleeve (112) are connected to the base plate (111) and the cover plate (113) respectively, and the base plate (111), the shaft sleeve (112) and the cover plate (113) surround to form the mounting cavity; The connecting part (122) comprises a hydraulic shaft core (1221), an outer cover assembly (1222) and a shaft coupling (1225), the hydraulic shaft core (1221) is partially arranged in the mounting cavity, and along the direction away from the mounting cavity, the hydraulic shaft core (1221) is sequentially fixedly connected with the outer cover assembly (1222) and the shaft coupling (1225), and the shaft coupling (1225) is further connected with the hydrostatic spindle (40); The first friction part (131) is arranged on the side of the outer cover assembly (1222) close to the base plate (111), and the second friction part (132) is arranged on the side of the base plate (111) close to the outer cover assembly (1222).

7. Hydrostatic spindle brake control system according to claim 6, characterized in that The hydraulic shaft core (1221) is provided with an annular outer flange (1226) near one end of the hydraulic cavity (114), an outer periphery of the annular outer flange (1226) is provided with an annular air-tight sealing cavity (115), one end of the first elastic element (121) abuts against the annular outer flange (1226), and the other end of the first elastic element (121) abuts against the cover plate (113).

8. Hydrostatic spindle brake control system according to claim 7, characterized in that The outer cover assembly (1222) comprises an annular cover body (1223) and an end plate (1224), the annular cover body (1223) covers an outer periphery of the shaft sleeve (112), and a plurality of bearing assemblies (30) are arranged between the shaft sleeve (112) and the annular cover body (1223).

9. Hydrostatic spindle brake control system according to claim 8, characterized in that The bearing assembly (30) at least comprises one of a roller bearing, a needle bearing, a tapered roller bearing and a thrust bearing.

10. The hydrostatic spindle brake control system of any one of claims 1 to 9, wherein, The first friction part (131) and / or the second friction part (132) comprises a friction plate.

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