A direct-connected spindle structure

Abstract

The present invention relates to the field of machining spindles, and in particular to a direct-connected spindle structure; comprising a spindle box, a motor, a spindle body, a coupling assembly, a cooling structure, a tool loosening cylinder and a tool beater, wherein the spindle box is provided with a spindle body, one end of the spindle body is connected to the motor through a coupling assembly, wherein a cooling structure for cooling the spindle body is provided on the outer wall of the spindle body, the tool loosening cylinder is installed on the spindle body, and the tool loosening cylinder is also connected to the tool beater; a sealing element is provided between the tool handle and the pull rod, thereby avoiding the contamination of the tool handle and the spindle by the machine tool cutting fluid, and reducing the damage of the debris in the machine tool cutting fluid to the contact surface of the tool handle.

Description

Technical Field

[0001] The invention relates to the field of machining spindles, and in particular to a direct-connection spindle structure. Background Art

[0002] CNC machine tools are the most widely used equipment in mechanical processing, and the machine tool spindle is the most important component of CNC machine tools. The quality of a CNC machine tool almost depends on the quality of its spindle, but in the actual use process, there are often more unexpected situations; for example, the spindle in the existing technology has poor cooling effect, and the spindle will be hit every time the tool is loaded and unloaded, thereby reducing the accuracy and service life of the spindle. The broaching device in the existing spindle will produce cutting water, which will cause the tool holder accuracy to deteriorate. Summary of the invention

[0003] In view of the problems mentioned in the prior art, the present invention provides a direct-connected spindle structure, which can solve the problems mentioned in the background art through an improved broach structure, a provided cooling structure, and an improved coupling assembly.

[0004] The present invention discloses a direct-connected spindle structure, comprising a spindle box, a motor, a spindle body, a coupling assembly, a cooling structure, a knife loosening cylinder and a knife beater, wherein the spindle box is provided with a spindle body, one end of the spindle body is connected to the motor through a coupling assembly, wherein a cooling structure for cooling the spindle body is provided on the outer wall of the spindle body, the knife loosening cylinder is installed on the spindle body, and the knife loosening cylinder is also connected to the knife beater; a pull rod is provided in the spindle body, a disc spring is sleeved on the pull rod, and the disc spring and the spindle body are over-fitted, and further comprising a claw, a tool handle and a pull rod assembly, the pull rod is connected to the pull rod assembly, the pull rod is also connected to the claw, and the claw is clamped and connected to the tool handle; the pull rod assembly comprises a seal, a hydraulic push rod, a sleeve and a spring, one end of the seal is fitted and connected to the tool handle, and the other end is connected to the hydraulic push rod, the spring is sleeved on the hydraulic push rod, the hydraulic push rod is also connected to the pull rod, and the pull rod is also sleeved with a sleeve.

[0005] Preferably, the housing further comprises a first sealing ring and a second sealing ring, wherein the first sealing ring and the second sealing ring are arranged between the pull rod and the outer sleeve, wherein a closed area is formed between the first sealing ring, the second sealing ring and the outer sleeve.

[0006] Preferably, the hydraulic push rod is also provided with a water outlet hole.

[0007] Preferably, the cooling structure includes a cooling water channel arranged on the outer wall of the main shaft body, and the main shaft body is provided with a cooling medium inlet connected to the cooling water channel inlet end, and a cooling medium outlet connected to the cooling water channel outlet end, wherein the cooling water channel is arranged in a spiral structure.

[0008] Preferably, the ratio of the inner diameters of the cooling medium inlet and the cooling medium outlet is 2:1.

[0009] Preferably, a raised belt extending along the spiral extension direction of the cooling water channel is formed inside the cooling water channel.

[0010] Preferably, the coupling assembly comprises a first coupling, a second coupling and an elastic member, the first coupling is connected to the second coupling, and the elastic member is arranged between the first coupling and the second coupling.

[0011] Preferably, a plurality of drainage holes are also provided on the side end of the main shaft body.

[0012] Preferably, a dust cover is further provided between the spindle body and the knife loosening cylinder.

[0013] Compared with the prior art, the present invention has achieved the following technical effects:

[0014] The present invention discloses a direct-connection spindle structure, wherein a seal is arranged between a tool handle and a pull rod, thereby preventing the tool handle and the spindle from being polluted by machine tool cutting fluid and reducing the damage to the contact surface of the tool handle by impurities in the machine tool cutting fluid. The closed area formed by the cooperation of the first sealing ring and the second sealing ring with the outer sleeve can further stress the hydraulic push rod and further improve the sealing effect. The spiral cooling water channel can effectively cool the spindle body, while the different inner diameters of the cooling medium inlet and the cooling medium outlet can reduce the circulation speed of the cooling liquid during circulation, thereby taking away most of the heat on the spindle and achieving a uniform cooling effect. The elastic member arranged between the first coupling and the second coupling can achieve buffering by absorbing mainly and dispersing the impact direction as a supplement, thereby achieving the effect of protecting the spindle. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the structure of the pull rod assembly of the present invention;

[0017] Figure 3 It is a schematic diagram of the sewage discharge hole structure of the present invention.

[0018] Figure markings: 1-tool handle; 2-cooling water channel; 3-cooling medium inlet; 4-spindle box; 5-cooling medium outlet; 6-tool loosening cylinder; 7-knife beater; 8-motor; 9-claw; 10-second coupling; 11-elastic member; 12-first coupling; 13-spindle body; 14-pull rod assembly; 15-seal; 16-hydraulic push rod; 17-jacket; 18-spring; 19-second sealing ring; 20-first sealing ring; 21-drain hole; 22-dust cover. DETAILED DESCRIPTION

[0019] Example 1

[0020] The present invention provides a spindle cooling structure, such as Figure 1 As shown, it includes a spindle box 4, a motor 8, a spindle body 13, a coupling assembly, a cooling structure, a knife loosening cylinder 6 and a knife beater 7. The spindle box 4 is provided with a spindle body 13, one end of the spindle body 13 is connected to the motor 8 through a coupling assembly, wherein the outer wall of the spindle body 13 is provided with a cooling structure for cooling the spindle body 13, the knife loosening cylinder 6 is installed on the spindle body 13, and the knife loosening cylinder 6 is also connected to the knife beater 7; a pull rod is provided in the spindle body 13, and a disc spring is sleeved on the pull rod, and the disc spring is connected to the spindle The body 13 is overfitted, and also includes a claw 9, a knife handle 1 and a pull rod assembly 14. The pull rod is connected to the pull rod assembly 14, and the pull rod is also connected to the claw 9. The claw 9 is clamped and connected to the knife handle 1; the pull rod assembly 14 includes a seal 15, a hydraulic push rod 16, a jacket 17 and a spring 18. One end of the seal 15 is connected to the knife handle 1, and the other end is connected to the hydraulic push rod 16. The spring 18 is sleeved on the hydraulic push rod 16, and the hydraulic push rod 16 is also connected to the pull rod, and the pull rod is also sleeved with a jacket 17. The first seal ring 20 and the second seal ring 19 are arranged between the pull rod and the jacket 17, and a closed area is formed between the first seal ring 20, the second seal ring 19 and the jacket 17. The hydraulic push rod 16 is also provided with a water outlet.

[0021] The seal 15 in this embodiment is made of rubber, wherein the seal 15 is closely connected to the tool handle 1, which can avoid the contamination of the tool handle 1 and the main body by the machine tool cutting fluid, reduce the damage of the debris and tiny iron filings in the machine tool cutting fluid to the contact surface of the tool handle 1, avoid the deterioration of the accuracy of the tool handle 1, and avoid damage to the spindle body 13; the enclosed area formed by the first sealing ring 20, the second sealing ring 19 and the outer sleeve 17 can seal the water sprayed from the water outlet of the hydraulic push rod 16, and the generated water pressure can form a thrust on the tool handle 1, thereby increasing the contact strength between the seal 15 and the tool handle 1, and further enhancing the sealing performance.

[0022] When in use, the disc spring contracts, driving the pull rod to push the claw 9 to clamp the knife handle 1. Under the elastic action of the spring 18, the hydraulic push rod 16 makes the seal 15 fit tightly with the knife handle 1. When high-pressure water overflows from the water outlet, the set seal 15 can play a sealing role. At the same time, the first sealing ring 20 and the second sealing ring 19 cooperate with the outer sleeve 17 to form a sealing area. Thrust will be generated in the sealing area, so that the hydraulic push rod 16 is further stressed, so that the seal 15 and the knife handle 1 are further tightly fitted, achieving a better sealing effect.

[0023] Example 2

[0024] This embodiment is basically the same as Embodiment 1, and this embodiment is an improvement made on the basis of Embodiment 1. Figure 1 As shown, in this embodiment, a spindle cooling structure includes a cooling water channel 2 arranged on the outer wall of the spindle body 13, and a cooling medium inlet 3 connected to the inlet end of the cooling water channel 2 is opened on the spindle body 13, and a cooling medium outlet 5 connected to the outlet end of the cooling water channel 2 is also opened, wherein the cooling water channel 2 is a spiral structure. The ratio of the inner diameter size between the cooling medium inlet 3 and the cooling medium outlet 5 is 2:1. The cooling water channel 2 is also formed with a raised belt extending along the spiral extension direction.

[0025] In this embodiment, the cooling water channel 2 is arranged on the outer wall of the main shaft body 13, and its cooling effect on the main shaft body 13 can achieve all-round cooling, with strong heat conductivity, and the temperature of the main shaft body 13 can be quickly discharged through the cooling liquid. Moreover, since the cooling water channel 2 is spiral, the cooling effect is uniform, which is very suitable for the heat dissipation of the main shaft body 13. In order to improve the heat dissipation capacity of the cooling liquid, reduce the flow speed of the cooling liquid inside the cooling water channel 2, and increase the heat exchange contact surface, the cooling water channel 2 is also formed with a raised belt extending along its spiral extension direction. At the same time, the ratio of the inner diameter of the cooling medium inlet 3 to the inner diameter of the cooling medium outlet 5 is set to 2:1. When the cooling medium flows, the raised belt can make the cooling medium have better heat exchange in the cooling water channel 2, and avoid the formation of a flow gap cavity in the cooling water channel 2, thereby increasing the heat dissipation area. At the same time, since the inner diameter of the cooling medium inlet 3 is larger than the inner diameter of the cooling medium outlet 5, the cooling medium can stay in the cooling water channel 2 for a longer time, thereby improving the heat dissipation effect.

[0026] Example 3

[0027] This embodiment is basically the same as embodiment 1 or 2, and this embodiment is an improvement made on the basis of embodiment 1 or 2. Figure 1 As shown, a spindle cooling structure is provided in this embodiment, wherein the coupling assembly includes a first coupling 12, a second coupling 10 and an elastic member 11, the first coupling 12 is connected to the second coupling 10, and the elastic member 11 is arranged between the first coupling 12 and the second coupling 10.

[0028] In this embodiment, an elastic member 11 is provided between the first coupling 12 and the second coupling 10, so when the device needs to loosen the knife,

[0029] The knife beating device 7 will produce an impact on the knife loosening cylinder 6, and the knife loosening cylinder 6 will use the kinetic energy generated by the impact to apply a driving force to the knife handle 1. The knife loosening cylinder 6 will use a part of the force through the main shaft body 13 to push open the claw 9, thereby loosening the knife handle 1; the other part of the force will produce a pulling force on the first coupling 12, so that it will move away from the second coupling 10 originally assembled together. The resulting vibration will be absorbed by the elastic member 11, thereby achieving the purpose of protecting the main shaft body 13.

[0030] Example 4

[0031] This embodiment is basically the same as embodiment 1, 2 or 3, and this embodiment is an improvement on embodiment 1, 2 or 3. A plurality of drainage holes 21 are further provided on the side end of the spindle body 13. A dust cover 22 is further provided between the spindle body 13 and the knife loosening cylinder 6.

[0032] In this embodiment, a drain hole 21 is added to the clearance end of the spindle body 13 for draining sewage. At the same time, multiple drain holes 21 at different heights are set. The stains that fall during the rotation of the spindle body 13 can be directly discharged through the drain holes 21 at both ends. It is simple and convenient, and the height can be determined according to specific needs. At the same time, a dust cover 22 is also provided between the spindle body 13 and the knife loosening cylinder 6. When dust enters the spindle body 13 and passes through the joint between the knife loosening cylinder 6 and it, the dust cover 22 can block it, and then the dust can be thrown out by rotating the spindle body 13.

Claims

1. A direct-connected spindle structure, characterized in that: The invention comprises a spindle box (4), a motor (8), a spindle body (13), a coupling assembly, a cooling structure, a knife loosening cylinder (6) and a knife beating device (7), wherein the spindle box (4) is provided with a spindle body (13), one end of the spindle body (13) is connected to the motor (8) via the coupling assembly, wherein the outer wall of the spindle body (13) is provided with a cooling structure for cooling the spindle body (13), the knife loosening cylinder (6) is installed on the spindle body (13), and the knife loosening cylinder (6) is also connected to the knife beating device (7); The spindle body (13) is provided with a pull rod, and a disc spring is sleeved on the pull rod. The disc spring and the spindle body (13) are overfitted. The spindle body (13) also includes a claw (9), a tool handle (1) and a pull rod assembly (14). The pull rod is connected to the pull rod assembly (14). The pull rod is also connected to the claw (9). The claw (9) is clamped and connected to the tool handle (1). The pull rod assembly (14) includes a seal (15), a hydraulic push rod (16), a sleeve (17) and a spring (18). One end of the seal (15) is fitted and connected to the tool handle (1), and the other end is connected to the hydraulic push rod (16). The spring (18) is sleeved on the hydraulic push rod (16). The hydraulic push rod (16) is also connected to the pull rod. The pull rod is also sleeved with a sleeve (17). It also includes a first sealing ring (20) and a second sealing ring (19), wherein the first sealing ring (20) and the second sealing ring (19) are arranged between the pull rod and the outer sleeve (17), wherein a closed area is formed between the first sealing ring (20), the second sealing ring (19) and the outer sleeve (17); The cooling structure comprises a cooling water channel (2) arranged on the outer wall of the main shaft body (13), wherein the main shaft body (13) is provided with a cooling medium inlet (3) connected to the inlet end of the cooling water channel (2), and is also provided with a cooling medium outlet (5) connected to the outlet end of the cooling water channel (2), wherein the cooling water channel (2) is arranged in a spiral structure; The coupling assembly comprises a first coupling (12), a second coupling (10) and an elastic member (11), wherein the first coupling (12) is connected to the second coupling (10), and the elastic member (11) is arranged between the first coupling (12) and the second coupling (10); A plurality of drainage holes (21) are also provided on the side end of the main shaft body (13).

2. A direct-connection spindle structure according to claim 1, characterized in that: The hydraulic push rod (16) is also provided with a water outlet hole.

3. A direct-connection spindle structure according to claim 1, characterized in that: The ratio of the inner diameters of the cooling medium inlet (3) and the cooling medium outlet (5) is 2:

1.

4. According to claim 1, a direct-connection spindle structure is characterized in that: The cooling water channel (2) is also internally formed with a raised belt extending along its spiral extension direction.

5. The direct-connection spindle structure according to claim 1, characterized in that: A dust cover (22) is also provided between the main shaft body (13) and the knife loosening cylinder (6).

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