End face oil seal structure

Abstract

The utility model discloses an end face oil seal structure which comprises a cutter head and a spindle box which are connected in a rotating mode, a liquid guide flow channel is arranged on the rear end face of the cutter head, a liquid inlet hole and a liquid inlet cavity which are communicated with each other are arranged in the spindle box, a valve element which is communicated with the liquid inlet hole and the liquid guide flow channel is arranged in the liquid inlet cavity, and a decontamination ring is embedded in the liquid outlet end of the liquid inlet cavity. The liquid outlet end of the valve element is sleeved with the decontamination ring, and the front side face of the decontamination ring is attached to the rear end face of the cutter head. Compared with the prior art, when the valve element works, butt joint of the liquid inlet hole and the liquid guide flow channel is achieved through high pressure, the valve element is blocked when a liquid supply system is closed, meanwhile, particle impurities can be prevented from entering a sealing face, and the service life of a sealing piece is prolonged.

Description

Technical Field

[0001] The utility model relates to a turret end face oil seal structure, in particular to an end face oil seal structure. Background Art

[0002] Powered tool turrets are used in CNC machine tools, primarily for loading various tools such as turning, milling, drilling, and flushing nozzles. The power switching mechanism in a traditional powered tool turret consists of a power source, a rotary sleeve, a drive shaft, and a drive sleeve. The power source is a servo motor with a bevel gear fixed to its output shaft. The rotary sleeve is equipped with a bevel gear that meshes with the bevel gear on the power source's output shaft. Switching between different tools is accomplished by rotating the cutterhead.

[0003] When the tool turret is operating, it typically supplies coolant or flushing fluid to the cutting tools or flushing nozzles on the cutter disc through the spindle box. Interconnected fluid infusion holes are located on the end face of the cutter disc and within the spindle box. The spindle box is equipped with a sealing ring at the outlet end of the infusion hole to prevent fluid leakage. However, when the tool turret is machining parts, the rear end face of the cutter disc is often splashed with sludge or iron sand. As the cutter disc rotates, the sludge or iron sand on the rear end face of the cutter disc rubs against the sealing ring. This can easily cause the sealing ring to wear and fall off after prolonged use, affecting the sealing ring's service life and the tool turret's sealing effectiveness.

[0004] In view of this, the applicant conducted in-depth research on the above issues, which led to the present case. Summary of the Invention

[0005] The main purpose of this utility model is to provide a method that can effectively solve the above technical problems.

[0006] In order to achieve the above objectives, the solution of the present invention is:

[0007] An end face oil seal structure includes a spindle box, wherein the spindle box is provided with a liquid inlet hole and a liquid inlet cavity which are interconnected, a valve core is provided inside the liquid inlet cavity, a guide hole is provided inside the valve core, the front end of the guide hole extends to the front end face of the valve core to form a first opening, and the rear end of the guide hole is provided with a plurality of diversion holes, the liquid inlet end of the diversion hole extends to the lower end of the side wall of the valve core to form a second opening, a sealing member is installed at the first opening of the valve core, a spring is provided on the valve core, and the spring presses against the rear end face of the valve core to seal the liquid inlet hole, a decontamination ring is embedded in the liquid outlet end of the liquid inlet cavity, the decontamination ring is sleeved on the liquid outlet end of the valve core, and the front side surface of the decontamination ring is in contact with the rear end face of the cutter disc.

[0008] Furthermore, a guide groove is provided on the side wall of the liquid inlet cavity, and a limiting cone protruding outward is provided on the outer side surface of the valve core. The limiting cone is slidably connected to the guide groove, one end of the spring is against the decontamination ring, and the other end of the spring is against the end surface of the limiting cone.

[0009] Furthermore, the front end of the sealing member is provided with an inclined abutment top, the rear end of the sealing member is provided with a fixing boss, the front end of the valve core is provided with a fixing groove, and the fixing boss is engaged with the fixing groove.

[0010] Furthermore, a first sealing ring groove is provided on the outer side surface of the valve core, and a first sealing ring is embedded in the first sealing ring groove.

[0011] Furthermore, a detachably connected adapter block is provided at the lower end of the spindle box, the liquid inlet cavity is arranged inside the adapter block, and a second sealing ring groove is provided on the rear side wall of the adapter block in which a second sealing ring is embedded.

[0012] Furthermore, the adapter block is connected to the spindle box by screw locking.

[0013] Compared with the prior art, the beneficial effects are:

[0014] (1) When the spindle box is not supplied with water, the spring of the utility model can push the valve core tightly against the end face of the liquid outlet end of the liquid inlet hole, and seal the liquid inlet hole through the bottom face of the valve core, so as to avoid the backflow of liquid in the liquid guide channel and the liquid inlet cavity. When the spindle box is supplied with water, the pressure in the liquid inlet hole gradually increases. When the pressure in the liquid inlet hole is greater than the elastic force of the spring, the hydraulic pressure pushes the valve core to the liquid inlet end of the liquid guide channel. At this time, the seal is tightly sealed with the end face of the cutter disc, and the liquid inlet hole is opened at the same time, so that the liquid inlet hole and the liquid inlet cavity are connected. The liquid can enter the diversion hole from the diversion hole, and finally flow into the liquid guide channel. In the utility model, the valve core realizes the docking of the liquid inlet hole and the liquid guide channel through high pressure when working, and the valve core is blocked when the liquid supply system is closed, and the structure is simple.

[0015] (2) The utility model is provided with a decontamination ring, which can remove the mud and iron sand on the surface of the cutter disc when the cutter disc rotates, so that the end face of the liquid guide channel and the liquid inlet cavity can be kept clean, ensuring that the seal inside the decontamination ring does not come into contact with the mud and iron sand, avoiding excessive friction damage to the seal, and effectively improving the service life of the seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the cross-sectional structure of the present utility model.

[0017] Figure 2 Based Figure 1 A partial enlarged view of area A in the middle.

[0018] Figure 3 It is a three-dimensional diagram of the valve core's external structure.

[0019] In the figure: the cutter disc 1, the liquid guide channel 11, the spindle box 2, the liquid inlet hole 21, the liquid inlet cavity 22, the guide groove 221, the valve core 3, the limit cone 31, the guide hole 32, the diverter hole 33, the fixed groove 34, the first sealing ring groove 35, the decontamination ring 4, the spring 5, the sealing member 6, the inclined abutment top 61, the fixed boss 62, the first sealing ring 71, the second sealing ring 72, the adapter block 8, and the second sealing ring groove 81. DETAILED DESCRIPTION

[0020] In order to further explain the technical solution of the present invention, the present invention will be described in detail below through specific embodiments.

[0021] like Figure 1-3 As shown, an end face oil seal structure includes a cutter disc 1 and a spindle box 2 that are rotatably connected to each other. The transmission structure between the cutter disc 1 and the spindle box 2 is a prior art and will not be described in detail here. The rear end face of the cutter disc 1 is provided with a liquid guide channel 11, which is the liquid inlet end of the cutter disc 1. The interior of the spindle box 2 is provided with a liquid inlet hole 21 and a liquid inlet cavity 22 that are interconnected. The interior of the liquid inlet cavity 22 is provided with a valve core 3 that connects the liquid inlet hole 21 and the liquid guide channel 11. The liquid outlet end of the liquid inlet cavity 22 is embedded with a decontamination ring 4, which is sleeved on the liquid outlet end of the valve core 3. The front side of the decontamination ring 4 fits with the rear end face of the cutter disc 1. A guide groove 221 is defined on the sidewall of the liquid inlet chamber 22. A protruding stopper 31 is provided on the outer side of the valve core 3, which is slidably connected to the guide groove 221. A spring 5 is also sleeved on the outer side of the valve core 3. One end of the spring 5 abuts against the decontamination ring 4, and the other end of the spring 5 abuts against the end surface of the stopper 31. When water is supplied to the spindle box 2, the spring 5 abuts against the stopper 31, pushing the valve core 3 against the liquid inlet hole 21, thereby sealing the liquid inlet hole 21.

[0022] In this embodiment, a guide hole 32 is provided inside the valve core 3. The front end of the guide hole 32 extends to the front end surface of the valve core 3 to form a first opening. The rear end of the guide hole 32 is provided with a plurality of diverter holes 33. The liquid inlet end of the diverter hole 33 extends obliquely to the lower end of the side wall of the valve core 3 to form a second opening. The diverter holes 33 are arranged obliquely so that liquid can only enter the guide hole 32 from the side wall of the valve core 3. In this way, when the valve core 3 blocks the liquid inlet hole 21, the liquid cannot enter the guide hole 32 and the diverter hole 33. A seal 6 is installed at the first opening of the valve core 3. The seal 6 can seal the contact part between the valve core 3 and the cutter disc 1 to prevent leakage during liquid supply. The front end of the seal 6 is provided with an inclined abutment top 61. When supplying water, the valve core 3 pushes the seal 6 against the beginning of the cutter disc 1. The inclined abutment top 61 can generate a reaction force to further stick to the end face of the cutter disc 1, thereby improving the sealing effect. The rear end of the seal 6 is provided with a fixing boss 62, and the front end of the valve core 3 is provided with a fixing groove 34. The fixing boss 62 engages with the fixing groove 34, making it easier to install and remove the seal 6. The outer side of the valve core 3 is provided with a first sealing ring groove 35, and a first sealing ring 71 is embedded in the first sealing ring groove 35. The first sealing ring 71 seals the connection between the valve core 3 and the side wall of the liquid inlet chamber 22.

[0023] In this embodiment, a removable adapter block 8 is provided at the lower end of the spindle housing 2. Specifically, the adapter block 8 is secured to the spindle housing 2 via screws, making assembly and disassembly more convenient. The liquid inlet chamber 22 is disposed within the adapter block 8. The rear sidewall of the adapter block 8 includes a second sealing ring groove 81, which houses a second sealing ring 72.

[0024] The above embodiments and drawings do not limit the product form and style of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. An end face oil seal structure, characterized in that: The spool is provided with a valve core inside the liquid inlet cavity, a guide hole is provided inside the valve core, the front end of the guide hole extends to the front end surface of the valve core to form a first opening, and the rear end of the guide hole is provided with a plurality of diversion holes, the liquid inlet end of the diversion hole extends to the lower end of the side wall of the valve core to form a second opening, a sealing member is installed at the first opening of the valve core, a spring is provided on the valve core, and the spring presses against the rear end surface of the valve core to seal the liquid inlet hole, and a decontamination ring is embedded in the liquid outlet end of the liquid inlet cavity, and the decontamination ring is sleeved on the liquid outlet end of the valve core, and the front side surface of the decontamination ring fits with the rear end surface of the cutter disc.

2. The end face oil seal structure according to claim 1, characterized in that: A guide groove is provided on the side wall of the liquid inlet cavity, and a limiting cone protruding outward is provided on the outer side surface of the valve core. The limiting cone is slidably connected to the guide groove, one end of the spring is against the decontamination ring, and the other end of the spring is against the end surface of the limiting cone.

3. The end face oil seal structure according to claim 2, characterized in that: The front end of the sealing member is provided with an inclined abutment top, the rear end of the sealing member is provided with a fixing boss, the front end of the valve core is provided with a fixing groove, and the fixing boss is engaged and connected with the fixing groove.

4. The end face oil seal structure according to claim 2, characterized in that: A first sealing ring groove is provided on the outer side surface of the valve core, and a first sealing ring is embedded in the first sealing ring groove.

5. The end face oil seal structure according to claim 1, characterized in that: The lower end of the main spindle box is provided with a detachable adapter block, the liquid inlet cavity is arranged inside the adapter block, and the rear side wall of the adapter block is provided with a second sealing ring groove in which a second sealing ring is embedded.

6. The end face oil seal structure according to claim 5, characterized in that: The adapter block is connected to the spindle box by screw locking.

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