Multi-path hydraulic rotary main shaft

Abstract

The invention discloses a multi-path hydraulic rotary main shaft, and belongs to the technical field of manufacturing of main shafts of hydraulic systems. The invention aims to solve the technical problem of how to realize hydraulic transmission on a rotary main shaft. According to the technical scheme, the hydraulic spindle is characterized by comprising a spindle body, a spindle sleeve body, a front bearing, a rear bearing and a front end cover, a plurality of hydraulic channels are formed in the end face of the spindle body in the length direction of the spindle body, and openings of the hydraulic channels are evenly distributed in the end face in the circumferential direction; first-class radial channels which are the same as the hydraulic channels in number and are communicated in a one-to-one correspondence mode are arranged on the peripheral face of a shaft body of the main shaft body, the lengths of the hydraulic channels on the shaft body are different, annular oil grooves which are the same as the hydraulic channels in number are formed in the inner side of the shaft sleeve body, and the annular oil grooves are correspondingly communicated with the first-class radial channels in a one-to-one correspondence mode. A second-class radial channel communicated with each annular oil groove is formed in the peripheral wall of the shaft sleeve body. The hydraulic oil conveying device has the advantage that the effect of conveying hydraulic oil on the rotating main shaft can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of main shaft manufacturing of hydraulic systems, in particular to a multi-channel hydraulic rotary main shaft. Background Art

[0002] At present, the main function of the spindle is to provide rotation, that is, the spindle plays an important role in the machine. The spindle is an important component used to support transmission parts on the machine tool. These transmission parts include gears, pulleys, etc., which are connected and supported to each other through the spindle. The spindle can transmit motion and torque. In the machine tool, the spindle is usually connected to a power source (such as an electric motor) to transmit the rotational motion generated by the power source to the workpiece or tool, thereby driving the workpiece or tool.

[0003] The working principle of hydraulic transmission is to use the pressure of liquid to transmit motion and power. It first converts the mechanical energy of the prime mover (such as an electric motor or internal combustion engine) into the pressure energy of the liquid through a power element (such as a hydraulic pump), and then uses an actuator (such as a hydraulic cylinder or a hydraulic motor) to convert the pressure energy of the liquid back into mechanical energy, thereby driving the working parts to move.

[0004] It is rare to combine hydraulic transmission and spindle in machine tools. We will find that the spindle needs to rotate, and hydraulic transmission relies on hydraulic pipelines. If the hydraulic pipelines are fixed on the spindle, the rotation of the spindle will cause the hydraulic pipelines to rotate and cannot be used normally. And we know that hydraulic transmission (drive) also needs to rely on multiple pipelines, not just a single pipeline, so it is very difficult to design a rotary spindle that requires multiple hydraulics. Summary of the invention

[0005] In order to solve the above-mentioned technical problems and shortcomings: how to combine multiple hydraulic pipelines on the main shaft so that the main shaft can rotate while still reliably transmitting hydraulic pressure, the present invention provides a multi-channel hydraulic rotary main shaft.

[0006] In order to achieve the above-mentioned purpose and other related purposes, the present invention adopts the following technical solutions:

[0007] A multi-way hydraulic rotary spindle comprises a spindle body, a sleeve body, a front bearing, a rear bearing and a front end cover. A plurality of hydraulic channels are arranged on the end surface of the spindle body along the length direction of the spindle body. The openings of the hydraulic channels are evenly distributed circumferentially on the end surface. A type of radial channels having the same number as the hydraulic channels and connected one by one are arranged on the circumference of the spindle body. The length of each hydraulic channel on the spindle body is different.

[0008] The inner side of the sleeve body is provided with annular oil grooves having the same number as the hydraulic channels, each annular oil groove is connected to a type of radial channel correspondingly, and the peripheral wall of the sleeve body is provided with a second type of radial channel connected to each annular oil groove;

[0009] The front bearing is assembled on the front of the main shaft body, and the rear bearing is assembled on the rear of the main shaft body. The main shaft body completes the rotation with the shaft sleeve body through the front bearing and the rear bearing. The front end cover is sleeved on the front end of the main shaft body and fixedly connected with the shaft sleeve body.

[0010] Preferably, the sleeve body is further provided with a first reflow groove and a second reflow groove, the first reflow groove is close to the middle, the second reflow groove is close to the outer end and faces the bearing, the first reflow groove and the second reflow groove are connected by a vertical channel, and the sleeve body is also provided with a horizontal channel, and the horizontal channel is connected to the vertical channel.

[0011] Preferably, a dust sealing flange is provided on the outside of the rear bearing, and the dust sealing flange is fixed to the end surface of the shaft sleeve body.

[0012] Preferably, the rear end of the main shaft body is provided with a thread and is fixed with an inner nut, and a synchronous wheel, a baffle plate and an outer nut are also fixed on the main shaft body at the rear end of the round nut, and the outer nut thread fits on the main shaft body and locks the baffle plate and the synchronous wheel.

[0013] Preferably, a plurality of the second type of radial channels are arranged in a gathering area of ​​the main shaft body.

[0014] Preferably, a positioning nut is provided at the rear end of the front bearing, and the positioning nut is fixed on the thread of the main shaft body.

[0015] Preferably, a through hole is provided on the peripheral surface of the front end cover.

[0016] In summary, the invention has at least one of the following beneficial technical effects:

[0017] 1. The spindle body can be rotated, and the front bearing and the rear bearing are matched on the sleeve body, so that the rotation axis of the spindle body can maintain a highly reliable horizontal state, that is, the spindle body can maintain the same axis as the sleeve body, thereby improving the reliability of use. The hydraulic channel is directly arranged on the spindle body to avoid the laying of additional pipelines, so that the hydraulic oil can be connected to the sleeve body. Multiple hydraulic channels can be designed to meet the needs of multi-channel function control, so that the hydraulic oil can be connected from the stationary sleeve body to the rotating spindle body;

[0018] 2. The hydraulic oil can be refluxed. The over-pressure hydraulic oil is retained from the horizontal channel on the sleeve body by using the first reflux groove and the second reflux groove, so as to facilitate the recycling of the refluxed hydraulic oil;

[0019] 3. The dust sealing flange can block dust, prevent foreign matter from entering, and protect the internal bearings;

[0020] 4. Through the threads on the spindle body, the rotation of the spindle body can be effectively controlled by using the inner nut and the synchronous wheel, the baffle plate and the outer nut;

[0021] 5. Gather multiple Class II radial channels to facilitate the connection of hydraulic pipelines. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a front view of an embodiment of the present invention;

[0023] Figure 2 yes Figure 1 The cross-sectional view at AA in FIG.

[0024] Figure 3 is a side view of an embodiment;

[0025] Figure 4 yes Figure 3 The cross-sectional view at BB in FIG.

[0026] Figure 5 It is a structural explosion diagram of the embodiment.

[0027] Description of the reference numerals of the main components:

[0028] 1. Spindle body; 11. Hydraulic channel; 12. First type radial channel; 13. Thread; 2. Bushing body; 21. Annular oil groove; 22. Second type radial channel; 23. First return groove; 24. Second return groove; 25. Vertical channel; 26. Horizontal channel; 3. Front bearing; 4. Rear bearing; 5. Front end cover; 6. Dust seal flange; 7. Inner nut; 8. Synchronous wheel; 9. Baffle; 10. Outer nut; 101. Aggregation area; 102. Positioning nut; 103. Through hole. DETAILED DESCRIPTION

[0029] The following is an explanation of the embodiments of the present invention by specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. The details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0030] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention. The illustrations only show the components related to the present invention rather than being drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0031] The specific implementation manner of the present invention will be further described below in conjunction with the accompanying drawings.

[0032] Example:

[0033] The invention discloses a multi-way hydraulic rotary spindle, referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, it includes a main shaft body 1, a sleeve body 2, a front bearing 3, a rear bearing 4, and a front end cover 5. A plurality of hydraulic channels 11 are arranged on the end face of the main shaft body 1 along the length direction of the shaft body, and the openings of the hydraulic channels 11 are evenly distributed circumferentially on the end face. A type of radial channels 12 that are the same in number as the hydraulic channels 11 and are connected one-to-one are arranged on the circumference of the shaft body of the main shaft body 1, and the length of each hydraulic channel 11 on the shaft body is different. In the specific example of this embodiment, 6 hydraulic channels 11 are arranged. The evenly distributed hydraulic channels 11 can maintain the structural rigidity of the main shaft body 1 and its uniform force. During the rotation process, the force deviation is reduced. The front bearing 3 and the rear bearing 4 are composed of multiple single bearings. The six first-class radial channels 12 are staggered, so that the six hydraulic oil circuits can be isolated from each other.

[0034] The inner side of the sleeve body 2 is provided with annular oil grooves 21 of the same number as the hydraulic channels 11 , each annular oil groove 21 is connected to a type of radial channel 12 one by one, and the peripheral wall of the sleeve body 2 is provided with a second type of radial channel 22 connected to each annular oil groove 21 .

[0035] Based on the above scheme, the front bearing 3 is assembled on the front part of the main shaft body 1, and the rear bearing 4 is assembled on the rear part of the main shaft body 1. The main shaft body 1 completes the rotation with the sleeve body 2 through the front bearing 3 and the rear bearing 4. The front end cover 5 is sleeved on the front end part of the main shaft body 1 and fixedly connected with the sleeve body 2.

[0036] It can be seen that the main shaft body 1 can be rotated, and the front bearing 3 and the rear bearing 4 are matched on the sleeve body 2, so that the rotating axis of the main shaft body 1 maintains a highly reliable horizontal state, that is, the main shaft body 1 can maintain a high degree of coaxiality with the sleeve body 2, thereby improving the reliability of use. The hydraulic channel 11 is directly arranged on the main shaft body 1 to avoid the laying of additional pipelines, so that the hydraulic oil can be connected to the sleeve body 2. A plurality of hydraulic channels 11 can be designed to meet the needs of multi-channel function control, so as to realize the function of connecting the hydraulic oil from the stationary sleeve body 2 and the rotatable main shaft body 1.

[0037] Preferably, the sleeve body 2 is further provided with a first reflux groove 23 and a second reflux groove 24, the first reflux groove 23 is close to the middle, the second reflux groove 24 is close to the outer end and faces the bearing, the first reflux groove 23 and the second reflux groove 24 are connected with a vertical channel 25, and the sleeve body 2 is further provided with a horizontal channel 26, which is connected with the vertical channel 25. The hydraulic oil can be refluxed, and the over-pressure hydraulic oil is retained from the horizontal channel 26 on the sleeve body 2 by using the first reflux groove 23 and the second reflux groove 24, so as to facilitate the recycling of the refluxed hydraulic oil;

[0038] Further preferably, a dust sealing flange 6 is provided outside the rear bearing 4, and the dust sealing flange 6 is fixed to the end surface of the sleeve body 2. The dust sealing flange 6 can block dust and prevent foreign matter from entering, thereby protecting the internal bearing.

[0039] refer to Figure 5 As shown, preferably, the rear end of the spindle body 1 is provided with a thread 13, and an inner nut 7 is fixed thereto. A synchronous wheel 8, a baffle plate 9 and an outer nut 10 are also fixed to the spindle body 1 at the rear end of the round nut. The thread 13 of the outer nut 10 fits on the spindle body 1 and locks the baffle plate 9 and the synchronous wheel 8. Through the thread 13 on the spindle body 1, the rotation of the spindle body 1 can be effectively controlled by using the inner nut 7, the synchronous wheel 8, the baffle plate 9 and the outer nut 10.

[0040] In order to facilitate the connection of hydraulic equipment, a plurality of second-class radial channels 22 are arranged in a gathering area 101 of the main shaft body 1. The plurality of second-class radial channels 22 are gathered together, so as to facilitate the connection of hydraulic pipelines.

[0041] In order to make the bearing work more stably and reliably, a positioning nut 102 is provided at the rear end of the front bearing 3 , and the positioning nut 102 is fixed on the thread 13 of the main shaft body 1 .

[0042] In order to lubricate the rotating gap, a through hole 103 is provided on the circumferential surface of the front end cover 5. The through hole 103 can be filled with oil (lubricating oil or grease).

[0043] As can be seen from the above structure, hydraulic oil can flow in the structure of this solution, wherein there are six controllable hydraulic oil circuits. Another oil circuit is a hydraulic oil recovery circuit. Thus, multiple hydraulic oil circuits can work on the rotating spindle.

[0044] The above embodiments are only illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, any equivalent changes made to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-way hydraulic rotary spindle, comprising a spindle body (1), a shaft sleeve body (2), a front bearing (3), a rear bearing (4), and a front end cover (5), characterized in that: A plurality of hydraulic channels (11) are arranged on the end surface of the main shaft body (1) along the length direction of the shaft body, the openings of the hydraulic channels (11) are evenly distributed circumferentially on the end surface, a type of radial channels (12) is arranged on the circumferential surface of the shaft body of the main shaft body (1), the number of which is the same as that of the hydraulic channels (11) and which are connected one-to-one, and the length of each hydraulic channel (11) on the shaft body is different. The inner side of the sleeve body (2) is provided with annular oil grooves (21) of the same number as the hydraulic channels (11), each annular oil groove (21) is connected to a type of radial channel (12) one by one, and the peripheral wall of the sleeve body (2) is provided with two types of radial channels (22) connected to each annular oil groove (21); The front bearing (3) is mounted on the front part of the main shaft body (1), and the rear bearing (4) is mounted on the rear part of the main shaft body (1). The main shaft body (1) rotates with the shaft sleeve body (2) through the front bearing (3) and the rear bearing (4). The front end cover (5) is sleeved on the front end of the main shaft body (1) and is fixedly connected to the shaft sleeve body (2).

2. A multi-way hydraulic rotary spindle according to claim 1, characterized in that: The shaft sleeve body (2) is further provided with a first reflow groove (23) and a second reflow groove (24), wherein the first reflow groove (23) is close to the middle part, and the second reflow groove (24) is close to the outer end and faces the bearing, and a vertical channel (25) is connected to the first reflow groove (23) and the second reflow groove (24), and a horizontal channel (26) is further provided on the shaft sleeve body (2), and the horizontal channel (26) is connected to the vertical channel (25).

3. The multi-way hydraulic rotary spindle according to claim 1, characterized in that: A dust sealing flange (6) is arranged outside the rear bearing (4), and the dust sealing flange (6) is fixed on the end surface of the shaft sleeve body (2).

4. The multi-way hydraulic rotary spindle according to claim 1, characterized in that: The rear end of the main shaft body (1) is provided with a thread (13) and is fixed with an inner nut (7). A synchronous wheel (8), a baffle plate (9) and an outer nut (10) are also fixed on the main shaft body (1) at the rear end of the round nut. The thread (13) of the outer nut (10) is matched with the main shaft body (1) and locks the baffle plate (9) and the synchronous wheel (8).

5. The multi-way hydraulic rotary spindle according to claim 1, characterized in that: A plurality of the second type of radial channels (22) are arranged in a gathering area (101) of the main shaft body (1).

6. The multi-way hydraulic rotary spindle according to claim 1, characterized in that: A positioning nut (102) is provided at the rear end of the front bearing (3), and the positioning nut (102) is fixed on the thread (13) of the main shaft body (1).

7. The multi-way hydraulic rotary spindle according to claim 1, characterized in that: A through hole (103) is provided on the peripheral surface of the front end cover (5).

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