TWM502117U - Ball screw having the cooling function - Google Patents

Description

Ball screw with cooling function

This creation relates to a ball screw, especially a ball screw with a cooling function.

According to the ball screw system, one of the important tools in the precision machinery industry in recent years, it uses a nut to linearly slide on a screw, which is used as an important component of the positioning and measurement system of a machine tool. However, when the ball is ball When the screw is running at high speed, the heat is frictionally generated between the nut and the screw, which causes the ball screw to be easily thermally deformed, thereby affecting the machining accuracy of the overall machine tool.

At present, the most common solution in the prior art is to form a cooling passage inside the screw, inject the coolant into one end of the cooling passage, and then discharge it from the other end of the cooling passage, but in this way, the flow rate of the coolant is too fast. It makes it impossible to evenly and effectively cool the integral ball screw.

Therefore, how to provide an improved ball screw to solve the problems faced by the above-mentioned problems, that is, the problem that the relevant person must solve at present.

In order to solve the above problems, the present invention provides a ball screw with a cooling function, which has a spoiler inside, so that the coolant can flow back through the spoiler to achieve uniform cooling of the ball screw.

In order to achieve the above object, the ball screw with cooling function comprises: a screw body which is rotatably disposed on a machine tool and has a nut sleeved outside, and a hollow channel inside, the screw body is extended The axis slot is disposed, and the hollow slot prop has a first end and a second end that is closed; and a cooling tube that is disposed in the hollow channel, and the cooling tube has an inlet end and an outlet end, wherein the inlet The end system is fixed to the first end, so that the cooling pipe can rotate along with the screw body, and a coolant is externally connected to the inlet end, and a spoiler is arranged between the outer edge of the cooling pipe and the hollow channel.

The spoiler is spiral, and is disposed on the outer edge of the cooling pipe and abuts against the wall of the hollow channel.

Wherein, the outlet end is located beside the second end.

The inlet end is connected to an injection pipe for injecting a coolant, and the first end is externally connected with a discharge pipe for discharging the used coolant.

Wherein, there is a cooler between the discharge pipe and the injection pipe, and the used coolant can be discharged to the cooler through the discharge pipe, and the cooler can re-cool the used coolant to inject into the injection pipe.

According to the above, one of the functions of the present invention can be achieved. After the coolant flows from the outlet end to the second end of the hollow channel, the flow can be followed by the spoiler to the first end of the hollow channel, thereby transmitting the disturbance. The design of the flow part, the overall flow rate of the coolant is slow, so that the contact time between the screw body and the coolant is longer, so that the heat convection exchange of the two is relatively complete, so that the screw body can achieve uniform cooling effect.

By the above, the second effect of the present invention is that the cooling tube can rotate along with the screw body so that there is no friction between the two, thereby avoiding unnecessary heat source production.

According to the above, the creation can achieve the third effect, the used coolant can be discharged to the cooler through the discharge pipe, and the cooler can re-cool the used coolant and flow it into the cooling pipe through the injection pipe. In order to achieve the function of recycling, it is very economical.

For the convenience of the description, the central idea expressed in the column of the above novel content is expressed by a specific embodiment. The various items in the embodiments are set forth in proportion to the description and not in the

Referring to Figures 1 to 5, the present invention provides a ball screw 100 with a cooling function, comprising:

A screw body 10 is rotatably disposed at a motor 201 of a power tool 200 and a hollow fixed base 202. The screw body 10 is externally sleeved with a nut 11 and has a hollow channel 12 therein. The axis of the screw body 10 is disposed, and one side of the fixing base 202 is externally connected with an injection pipe 30, which can communicate with the inside of the fixing base 202, and the other end of the injection pipe 30 is connected to a cooling machine 50, as shown in FIG. 2 and FIG. As shown in FIG. 3, the coolant 51 in the cooler 50 is injected into the fixing base 202 via the injection pipe 30. Further, two oil seals 60 are interposed between the screw main body 10 and the fixing base 202 to prevent the coolant 51 from being exposed.

The hollow channel 12 has a first end 13 and a second end 14 in a closed shape, wherein the first end 13 is located in the fixing base 202, the second end 14 is adjacent to the motor 201, and further, the first end 13 One side has a discharge hole 15 for externally connecting a discharge pipe 40, and the other end of the discharge pipe 40 is connected to the cooler 50, so that the cooler 50 is located between the discharge pipe 40 and the injection pipe 30, Reach the function of the loop.

a cooling tube 20 is disposed in the hollow channel 12, and the cooling tube 20 has an inlet end 21 and an outlet end 22, wherein the inlet end 21 is in communication with the interior of the mounting base 202, and the outlet end 22 is located in the second Next to the end 14, the inlet end 21 is fixed to one end of a steel sleeve 23, so that the inlet end 21 can be tightly fixed to the first end 13 of the hollow channel 12, so that the first end 13 is closed, and the cooling tube 20 It can rotate with the screw body 10.

In addition, the other end of the steel sleeve 23 has a hollow fixing nut 24 for preventing the inlet end 21 from coming out of the steel sleeve 23. Further, the outer edge of the cooling tube 20 is provided with a spiral spoiler 25, In the preferred embodiment of the present invention, the spoiler 25 is a spring and abuts against the wall of the hollow channel 12, so that the spoiler 25 is located between the screw body 10 and the cooling tube 20, as shown in FIG. Figure 5 shows.

The above is an overview of the structure and shape of the creation, and the use of the creation and the principle of its efficacy can be stated as follows:

When the power tool 200 is operated to linearly slide the nut 11 on the screw body 10, the cooler 50 can flow the coolant 51 through the injection pipe 30 into the fixed seat 202, so that the coolant 51 can pass through the inlet end 21 After flowing into the cooling pipe 20, and after the cooling liquid 51 flows out from the outlet end 22 to the second end 14 of the hollow channel 12, the coolant 51 can flow back to the first end 13 of the hollow channel 12 following the spoiler 25. At this time, the coolant 51 can be thermally convectively exchanged with the screw body 10, thereby cooling the integral ball screw 100.

After the used coolant 51 is returned to the first end 13, it can be discharged to the cooler 50 via the discharge pipe 40. At this time, the cooler 50 can cool the used coolant 51 again and pass it through the injection pipe. 30 again flows into the cooling pipe 20, thereby achieving the function of recycling and recycling, which is extremely economical.

Therefore, the overall flow rate of the coolant 51 is slowed by the design of the spoiler 25, so that the screw body 10 and the coolant 51 are in contact for a long time, so that the heat convection exchange of the two is complete, and the screw body is further 10 can achieve the effect of uniform cooling.

In addition, since the cooling tube 20 can be rotated with the screw body 10, there is no friction between the two, thereby avoiding unnecessary heat source production.

Moreover, referring to FIG. 6, another embodiment of the present invention is different from the foregoing. The screw body 10 has a detachable wear-resistant device 16 at the end of the fixing base 202, and The first end 13 of the hollow channel 12 is located within the wear-resistant device 16, whereby the wear-resistant device 16 prevents excessive friction between the two oil seals 60 when the screw body 10 is rotated.

The above embodiments are merely illustrative of the present invention and are not intended to limit the scope of the present invention. Any modification or change that is not in violation of the spirit of this creation is the scope of patent application for this creation.

100‧‧‧Ball screw
10‧‧‧ screw body
11‧‧‧ Nuts
12‧‧‧ hollow channel
13‧‧‧ first end
14‧‧‧ second end
15‧‧‧Exhaust hole
16‧‧‧Abrasion device
20‧‧‧ Cooling tube
21‧‧‧ entrance end
22‧‧‧export end
23‧‧‧Steel sleeve
24‧‧‧ fixed nuts
25‧‧‧Scattering Department
30‧‧‧Injection tube
40‧‧‧Draining tube
50‧‧‧cooler
51‧‧‧ Coolant
60‧‧‧ oil seal
200‧‧‧Tool Machine
201‧‧‧Motor
202‧‧‧ fixed seat

Figure 1 is a schematic diagram of the appearance of the present application for a machine tool. Figure 2 is a schematic view of the appearance of the present creation. Figure 3 is a partial half cross-sectional view of Figure 2. Figure 4 is a cross-sectional view of the present creation. Figure 5 is a partial enlarged view of Figure 4. Figure 6 is another embodiment of the present creation.

10‧‧‧ screw body

11‧‧‧ Nuts

12‧‧‧ hollow channel

14‧‧‧ second end

15‧‧‧Exhaust hole

20‧‧‧ Cooling tube

21‧‧‧ entrance end

22‧‧‧export end

23‧‧‧Steel sleeve

24‧‧‧ fixed nuts

25‧‧‧Scattering Department

30‧‧‧Injection tube

40‧‧‧Draining tube

51‧‧‧ Coolant

60‧‧‧ oil seal

202‧‧‧ fixed seat

Claims (10)

A ball screw with a cooling function, comprising: a screw body, which is rotatably disposed on a machine tool and has a nut sleeved on the outside, and has a hollow channel inside, extending the axis of the screw body, and The hollow slot prop has a first end and a second end that is closed; and a cooling tube that is disposed through the hollow channel, and the cooling tube has an inlet end and an outlet end, wherein the inlet end Is fixed to the first end, so that the cooling tube can rotate with the screw body, and the inlet end is externally connected with a coolant, and the outer edge of the cooling tube and the hollow channel have a spoiler; After the coolant exits the outlet end, the coolant can be returned to the first end of the hollow channel to achieve uniform cooling of the screw body. The ball screw having a cooling function according to claim 1, wherein the spoiler is spiral, and is disposed at an outer edge of the cooling pipe and abuts against a wall portion of the hollow channel. A ball screw having a cooling function according to claim 2, wherein the spoiler is a spring. A ball screw having a cooling function according to claim 1, wherein the outlet end is located beside the second end. The ball screw having a cooling function according to claim 1, wherein the inlet end is connected to an injection pipe to inject the coolant, and the first end is externally connected to a discharge pipe for cooling the used one. The liquid is discharged. The ball screw having a cooling function according to claim 5, wherein a cooling machine is disposed between the discharge pipe and the injection pipe, and the coolant can be discharged to the cooler through the discharge pipe, the cooler The used coolant can be cooled again to inject the injection tube. The ball screw with a cooling function according to claim 6, wherein the two ends of the screw body are respectively rotatably disposed on a motor of the machine tool and a hollow fixed seat, and the inlet end and the injection pipe are both It is connected to the inside of the holder. The ball screw with cooling function according to claim 1, wherein the inlet end is fixed to a steel sleeve, so as to be tightly fixed to the first end of the hollow channel, and the first end is closed. The ball screw with a cooling function according to claim 8, wherein the inlet end is fixed to one end of the steel sleeve, and the other end of the steel sleeve has a hollow fixing nut for preventing the inlet end from The steel sleeve is worn out. A ball screw having a cooling function according to claim 1, wherein one end of the screw body has a wear-resistant device, and the first end of the hollow channel is located in the wear-resistant device.