Oil drainage structure for hydrostatic guideway

Abstract

The utility model discloses an oil drainage structure for a static pressure guide rail, the static pressure guide rail comprises a guide rail body and a sliding block arranged on the guide rail body in a sliding mode, and the oil drainage structure for the static pressure guide rail comprises an electromagnetic directional valve, an adjustable throttling block, a throttling block driving mechanism and a fixed throttling block. An oil inlet channel, a first oil discharge channel and a second oil discharge channel are arranged in the sliding block; the electromagnetic directional valve is provided with an oil inlet, a normally open oil outlet and a normally closed oil outlet, the oil inlet is communicated with the oil inlet channel, the normally closed oil outlet is communicated with the first oil discharge channel, and the normally open oil outlet is communicated with the second oil discharge channel; the adjustable throttling block is arranged in the first oil discharge channel in a limiting and sliding mode in the axial direction; the throttling block driving mechanism is installed in the sliding block, and the throttling block driving mechanism is in transmission connection with the adjustable throttling block. According to the utility model, the oil drainage flow can be accurately controlled, and stable, reliable and safe oil drainage can be ensured during power failure.

Description

Technical Field

[0001] The utility model relates to an oil drain structure for a static pressure guide rail, belonging to the technical field of static pressure guide rails. Background Art

[0002] At present, in the manufacturing industry, hydrostatic guide rails are widely used due to their advantages such as high precision, high rigidity and low friction. Among them, the oil leakage structure of the hydrostatic guide rail, as an important component of the guide rail system, has a vital impact on the performance and stability of the entire system.

[0003] After searching the prior art, it was found that a Chinese patent with publication number CN221170401U disclosed an oil drain block for a hydrostatic guide rail. In this patent, a motor is used to control the throttling block to adjust the oil drain flow, thereby realizing the oil drain function. However, during use, it was found that the oil drain flow was difficult to accurately control, and there was a lack of reliable and safe oil drain protection when the system was powered off, which may affect the processing accuracy and production safety. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide an oil leakage structure for a hydrostatic guide rail, which can realize accurate control of the oil leakage flow and ensure stable, reliable and safe oil leakage in the event of a power outage.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: an oil drain structure for a hydrostatic guide rail, wherein the hydrostatic guide rail includes a guide rail body and a slider slidably arranged on the guide rail body, including:

[0006] The slide block is provided with an oil inlet channel, a first oil unloading channel and a second oil unloading channel;

[0007] an electromagnetic reversing valve, the electromagnetic reversing valve being provided with an oil inlet, a normally open oil outlet, and a normally closed oil outlet, the oil inlet being connected to the oil inlet passage, the normally closed oil outlet being connected to the first oil unloading passage, and the normally open oil outlet being connected to the second oil unloading passage;

[0008] An adjustable flow block, the adjustable flow block being slidably disposed in the first oil unloading channel along an axial direction;

[0009] a throttle block driving mechanism, the throttle block driving mechanism being installed in the slider, the throttle block driving mechanism being in driving connection with the adjustable flow block, and the throttle block driving mechanism being adapted to drive the adjustable flow block to adjust the flow in the first oil unloading channel;

[0010] A fixed throttling block is fixedly arranged in the second oil unloading channel.

[0011] Furthermore, a plurality of micro holes distributed in a circular array are provided on the axial end surface of the fixed throttling block.

[0012] Furthermore, the adjustable flow block is a columnar structure, an axial opening is provided at the upper end of the adjustable flow block, and a screw block is provided in the axial opening;

[0013] The oil drain structure for the static pressure guide rail further comprises a screw, the screw being threadedly connected to the screw block of the adjustable flow block, and the upper end of the screw being fixedly connected to a transmission assembly;

[0014] The throttling block driving mechanism is suitable for driving the screw to rotate through the transmission component, thereby driving the adjustable flow block to move back and forth along the axial direction in the first oil unloading channel.

[0015] Furthermore, a specific type of throttle block driving mechanism is provided, wherein the throttle block driving mechanism is a driving motor, and an output shaft is provided on the driving motor.

[0016] Furthermore, a specific structure of a transmission assembly is provided, wherein the transmission assembly includes a driving gear and a driven gear;

[0017] The driving gear is fixedly connected to the output shaft of the driving motor;

[0018] The driven gear is fixedly mounted on the upper end of the screw rod and meshes with the driving gear for transmission.

[0019] Furthermore, the oil leakage structure for the hydrostatic guide rail also includes a rotation sensor, which is fixedly installed in the slider. The rotation sensor is provided with a detection end, on which a detection gear is fixedly installed, and the detection gear is engaged with the driven gear at the top end of the screw.

[0020] Furthermore, a specific type of rotation sensor is provided, wherein the rotation sensor is a magnetic rotary encoder.

[0021] Furthermore, the adjustable flow block is cylindrical, and a conical throttling surface is provided at the bottom of the adjustable flow block, and the conical throttling surface is adapted to the inner wall of the first oil unloading channel.

[0022] By adopting the above technical solution, the utility model has the following beneficial effects:

[0023] In the utility model, when it is necessary to control oil leakage, the electromagnetic reversing valve is energized, at which time the normally closed oil outlet is opened and the normally open oil outlet is closed, and the oil enters from the oil inlet channel through the oil inlet of the electromagnetic reversing valve, and then flows from the normally closed oil outlet to the first oil unloading channel. The position of the adjustable flow block is precisely controlled by the throttle block driving mechanism to adjust the oil leakage flow; when the system is powered off, the electromagnetic reversing valve loses power and resets, the normally closed oil outlet is closed, the normally open oil outlet is opened, and the oil flows out from the oil inlet channel through the second oil unloading channel, and stable oil leakage is achieved by fixing the throttle block.

[0024] In addition, the adjustable flow block is driven to move by a screw drive, and in conjunction with the transmission assembly, axial displacement control is achieved, thereby improving throttling accuracy; a magnetic rotary encoder is set as a rotation sensor to detect the screw rotation position in real time, thereby ensuring the accuracy of the adjustable flow block position control.

[0025] In summary, the utility model realizes precise flow control under normal working conditions and stable oil leakage under power-off conditions, and ensures the reliability and accuracy of the entire operation through real-time feedback from the rotary sensor, significantly improving the comprehensive performance of the hydrostatic guide rail, and has important practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional partial cross-sectional schematic diagram of the oil drain structure for the hydrostatic guide rail of the present utility model;

[0027] Figure 2 for Figure 1 A partial enlarged view of part A;

[0028] Figure 3 This is a structural schematic diagram of the fixed throttle block of the oil drain structure for the hydrostatic guide rail of the utility model. DETAILED DESCRIPTION

[0029] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments in conjunction with the accompanying drawings.

[0030] like Figure 1-3 As shown, an oil drain structure for a hydrostatic guide rail, the hydrostatic guide rail includes a guide rail body and a slider slidably arranged on the guide rail body, including:

[0031] An oil inlet channel 10, a first oil unloading channel 11 and a second oil unloading channel 12 are provided in the slider;

[0032] The electromagnetic reversing valve 2 is provided with an oil inlet, a normally open oil outlet and a normally closed oil outlet. The oil inlet is connected to the oil inlet channel 10, the normally closed oil outlet is connected to the first oil unloading channel 11, and the normally open oil outlet is connected to the second oil unloading channel 12;

[0033] An adjustable flow block 3 is axially limited and slidably disposed in the first oil unloading channel 11;

[0034] A throttle block driving mechanism is installed in the slider, the throttle block driving mechanism is in driving connection with the adjustable flow block 3, and the throttle block driving mechanism is suitable for driving the adjustable flow block 3 to adjust the flow in the first oil unloading channel 11;

[0035] The fixed throttle block 4 is fixedly arranged in the second oil unloading channel 12 .

[0036] In this embodiment, if Figure 1-3 As shown, when oil leakage needs to be controlled, the electromagnetic reversing valve 2 is energized, at this time the normally closed oil outlet is opened, the normally open oil outlet is closed, the oil enters from the oil inlet channel 10 through the oil inlet of the electromagnetic reversing valve 2, and then flows from the normally closed oil outlet to the first oil unloading channel 11, and the position of the adjustable flow block 3 is controlled by the throttle block driving mechanism to adjust the oil leakage flow; when the whole power is cut off, the electromagnetic reversing valve 2 loses power and resets, the normally closed oil outlet is closed, the normally open oil outlet is opened, the oil flows out from the oil inlet channel 10 through the second oil unloading channel 12, and stable oil leakage is achieved through the fixed throttle block 4.

[0037] Specifically, such as Figure 1-3 As shown, the axial end surface of the fixed throttle block 4 is provided with a plurality of micro holes distributed in a circumferential array.

[0038] In this embodiment, in order to further optimize the oil leakage effect, the micropores of the fixed throttle block 4 may be designed with a conical structure, that is, the aperture at the oil inlet end is slightly larger than the aperture at the oil outlet end.

[0039] Specifically, such as Figure 1-2 As shown, the adjustable flow block 3 is a columnar structure, and an axial opening is provided at the upper end of the adjustable flow block 3, and a screw block is provided in the axial opening;

[0040] The oil drain structure for the static pressure guide rail further comprises a screw, which is threadedly connected to the screw block of the adjustable flow block 3, and the upper end of the screw is fixedly connected to the transmission assembly;

[0041] The throttling block driving mechanism is suitable for driving the screw to rotate through the transmission assembly, thereby driving the adjustable flow block 3 to move back and forth axially in the first oil unloading channel 11.

[0042] In this embodiment, if Figure 1-2 As shown, during use, the throttle block drive mechanism rotates the screw through the transmission assembly. Since the screw forms a threaded engagement with the screw on the adjustable flow block 3, rotation of the screw drives the adjustable flow block 3 to reciprocate along the axial direction of the first oil unloading channel 11. To ensure stability and accuracy during this movement, an anti-rotation key is provided on the outer circumference of the adjustable flow block 3. This anti-rotation key engages with a keyway on the inner wall of the first oil unloading channel 11.

[0043] Specifically, such as Figure 2 As shown, the throttle block driving mechanism is a driving motor 6, and the driving motor 6 is provided with an output shaft.

[0044] Specifically, such as Figure 2 As shown, the transmission assembly includes a driving gear 71 and a driven gear 72;

[0045] The driving gear 71 is fixedly connected to the output shaft of the driving motor 6;

[0046] The driven gear 72 is fixedly mounted on the upper end of the screw and meshes with the driving gear 71 for transmission.

[0047] Specifically, such as Figure 2 As shown, the oil leakage structure for the hydrostatic guide rail also includes a rotation sensor 8, which is fixedly installed in the slider. The rotation sensor 8 is provided with a detection end, on which a detection gear is fixedly installed, and the detection gear is engaged with the driven gear 72 at the top of the screw.

[0048] Specifically, such as Figure 2 As shown, the rotation sensor 8 is a magnetic rotary encoder.

[0049] In this embodiment, if Figure 2 As shown, in order to detect the rotation position of the screw, a rotation sensor 8 is provided, specifically a magnetic rotary encoder. The rotation sensor 8 is fixedly mounted in the slider, and the detection gear mounted on its detection end is meshed with the driven gear 72 at the top of the screw.

[0050] Specifically, such as Figure 1-2 As shown, the adjustable flow block 3 is cylindrical, and a conical throttling surface is provided at the bottom of the adjustable flow block 3 , which is matched with the inner wall of the first oil unloading channel 11 .

[0051] In this embodiment, if Figure 1-2 As shown, the adjustable flow block 3 is cylindrical in design, with a conical throttling surface at its bottom, adapted to mate with the inner wall of the first oil unloading channel 11. As the adjustable flow block 3 moves axially, the throttling gap between the conical throttling surface and the inner wall of the channel changes accordingly, enabling precise adjustment of the oil discharge flow rate.

[0052] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An oil drain structure for a hydrostatic guide rail, wherein the hydrostatic guide rail comprises a guide rail body and a slider slidably arranged on the guide rail body, characterized in that: include: An oil inlet channel (10), a first oil unloading channel (11) and a second oil unloading channel (12) are provided in the slider; An electromagnetic reversing valve (2), the electromagnetic reversing valve (2) being provided with an oil inlet, a normally open oil outlet, and a normally closed oil outlet, the oil inlet being connected to the oil inlet passage (10), the normally closed oil outlet being connected to the first oil unloading passage (11), and the normally open oil outlet being connected to the second oil unloading passage (12); An adjustable flow block (3), the adjustable flow block (3) being slidably arranged in the first oil unloading channel (11) along an axial direction; a throttle block driving mechanism, the throttle block driving mechanism being installed in the slider, the throttle block driving mechanism being in driving connection with the adjustable flow block (3), the throttle block driving mechanism being adapted to drive the adjustable flow block (3) to adjust the flow in the first oil unloading channel (11); A fixed throttling block (4) is fixedly arranged in the second oil unloading channel (12).

2. The oil drain structure for a hydrostatic guide rail according to claim 1, characterized in that: The axial end surface of the fixed throttling block (4) is provided with a plurality of micro holes distributed in a circumferential array.

3. The oil drain structure for a hydrostatic guide rail according to claim 1, characterized in that: The adjustable flow block (3) is a columnar structure, and an axial opening is provided at the upper end of the adjustable flow block (3), and a screw block is provided in the axial opening; It also includes a screw, which is threadedly connected to the screw block of the adjustable flow block (3), and the upper end of the screw is fixedly connected to a transmission assembly; The throttling block driving mechanism is suitable for driving the screw to rotate through a transmission component, thereby driving the adjustable flow block (3) to move back and forth axially in the first oil unloading channel (11).

4. The oil drain structure for a hydrostatic guide rail according to claim 3, characterized in that: The throttling block driving mechanism is a driving motor (6), and the driving motor (6) is provided with an output shaft.

5. The oil drain structure for a hydrostatic guide rail according to claim 4, characterized in that: The transmission assembly includes a driving gear (71) and a driven gear (72); The driving gear (71) is fixedly connected to the output shaft of the driving motor (6); The driven gear (72) is fixedly mounted on the upper end of the screw and meshes with the driving gear (71) for transmission.

6. The oil drain structure for a hydrostatic guide rail according to claim 5, characterized in that: The invention also includes a rotation sensor (8), which is fixedly installed in the slider. The rotation sensor (8) is provided with a detection end, on which a detection gear is fixedly installed, and the detection gear is meshed with a driven gear (72) at the top end of the screw.

7. The oil drain structure for a hydrostatic guide rail according to claim 6, characterized in that: The rotation sensor (8) is a magnetic rotary encoder.

8. The oil drain structure for a hydrostatic guide rail according to claim 1, characterized in that: The adjustable flow block (3) is cylindrical, and a conical throttling surface is provided at the bottom of the adjustable flow block (3), and the conical throttling surface is adapted to the inner wall of the first oil unloading channel (11).

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