Assembly structure of cooled ball screw

Abstract

The present invention is an assembly structure for a cooling ball screw. The first and second nuts are respectively screwed onto the screw, and the first and second nuts have a cap barrel and a cooling channel. The cap barrel has an end face, and the end face is provided with a docking hole connected to the cooling channel. A pre-compression plate is sandwiched between the first and second nuts, and a plurality of slots are provided on the periphery of the pre-compression plate. The close-fitting component includes a close-fitting seat, an intermediate ring body, and the first and second close-fitting ring bodies attached to the two sides of the intermediate ring body. The close-fitting component is arranged in the slot through the intermediate ring body, and the first and second close-fitting ring bodies are passed through the docking holes. This simplifies the assembly method of the cooling ball screw, and enables the two nuts to be tightly combined at the docking point to avoid leakage.

Description

Technical Field

[0001] The present invention relates to a ball screw, and in particular to an assembly structure of a cooling ball screw. Background Art

[0002] A ball screw is a common linear transmission mechanism in automatic equipment. Its main structure is to screw a nut onto a screw, and set multiple steel balls between the nut and the screw to drive the nut to move linearly along the screw through the rotation of the screw.

[0003] Furthermore, when the ball screw moves at high speed, the steel balls between the nut and the screw will generate heat due to friction or rolling, causing the ball screw to easily deform due to heat and affecting the positioning accuracy of the setting. In order to reduce the thermal impact of the ball screw, the industry has developed a cooling channel in the nut and injected coolant to cool the ball screw. However, when the ball screw includes multiple nuts that are connected, the connection between adjacent nuts is through components such as pre-compression plates and sealing components, but the cooling channel often leaks due to the lack of tightness at the connection. In addition, the aforementioned pre-compression plates and sealing components require the use of jigs during assembly, which prolongs the assembly time and causes inconvenience.

[0004] In view of this, the present inventor has devoted himself to studying the above-mentioned prior art and has applied theoretical knowledge to try his best to solve the above-mentioned problems, which has become the present inventor's research motivation. Summary of the Invention

[0005] An object of the present invention is to provide an assembly structure for a cooling ball screw, which can achieve a tight fit at the joint of two nuts to prevent leakage, simplify the assembly method of the cooling ball screw and shorten the assembly time.

[0006] In order to achieve the above-mentioned purpose, the present invention is an assembly structure of a cooling ball screw, comprising a screw, a first nut, a second nut, a pre-compression plate and a plurality of close-fitting components. The first nut is screwed onto the screw, and the first nut has a first cap barrel and a plurality of first cooling channels, the first cap barrel has a first end face, and the first end face is provided with a plurality of first docking holes connected to the first cooling channels. The second nut is screwed onto the screw, and the second nut has a second cap barrel and a plurality of second cooling channels, the second cap barrel has a second end face facing the first nut, and the second end face is provided with a plurality of second docking holes connected to the second cooling channels. The pre-compression plate is sandwiched between the first nut and the second nut, and the periphery of the pre-compression plate is provided with a plurality of slots corresponding to the first docking holes and the second docking holes. The close-fitting component includes a close-fitting seat, an intermediate ring body arranged in the close-fitting seat, a first close-fitting ring body adhering to the intermediate ring body and facing the first nut, and a second close-fitting ring body adhering to the intermediate ring body and facing the second nut. Each close-fitting component is arranged in each groove through the intermediate ring body, and the first close-fitting ring body is inserted into each first docking hole, and the second close-fitting ring body is inserted into each second docking hole.

[0007] Compared to the known ones, the assembly structure of the cooling ball screw of the present invention is provided with a pre-compression plate and a close-fitting component between the two nuts. The close-fitting component is assembled by setting the intermediate ring body in the close-fitting seat, and then affixing the first and second close-fitting ring bodies to the opposite sides of the intermediate ring body respectively. Accordingly, a portion of the first and second close-fitting ring bodies will protrude from both sides of the close-fitting seat and penetrate into the corresponding nut docking holes of the nuts, so that the first and second nuts can be tightly combined by the arrangement of the pre-compression plate and the close-fitting component, thereby avoiding leakage of the coolant poured into the cooling channel. In addition, the assembly method of the pre-compression plate and the close-fitting component of the present invention is simple, and does not require the use of additional jigs, which has the effect of simplifying the assembly method and shortening the assembly time, thereby increasing the practicality of the present invention.

[0008] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but this does not limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a combined cross-sectional view of the assembly structure of the cooling ball screw of the present invention.

[0010] Figure 2 This is a schematic three-dimensional appearance diagram of the cooling ball screw of the present invention with the screw removed.

[0011] Figure 3 This is a schematic exploded perspective view of the cooling ball screw of the present invention after the screw is removed.

[0012] Figure 4 This is a cross-sectional view of the cooling ball screw of the present invention after the screw is removed.

[0013] Figure 5It is a schematic diagram of the combination of the pre-compression sheet and the close-fitting component of the present invention.

[0014] Figure 6 It is a three-dimensional exploded diagram of the close-fitting component of the present invention.

[0015] Figure 7 It is an exploded sectional view of the close-fitting component of the present invention.

[0016] Figure 8 It is a combined cross-sectional view of the close-fitting components of the present invention.

[0017] Wherein, the reference numerals:

[0018] 1: Cooling ball screw

[0019] 10: Screw

[0020] 20: First nut

[0021] 21: First hat box

[0022] 210: First docking hole

[0023] 211: First end surface

[0024] 22: First cooling channel

[0025] 30: Second nut

[0026] 31: Second hat box

[0027] 310: Second docking hole

[0028] 311: Second end face

[0029] 32: Second cooling channel

[0030] 33: screw hole

[0031] 40: Pre-compression tablets

[0032] 41:Piercing

[0033] 42: Slotting

[0034] 50: Close contact components

[0035] 500:Through hole

[0036] 51: Close connection seat

[0037] 510: accommodating tank

[0038] 511:Splint

[0039] 512: Groove

[0040] 513: Ring

[0041] 52: Intermediate ring

[0042] 53: The first tight ring body

[0043] 530: First ring groove

[0044] 54:Second tight ring body

[0045] 540: Second ring groove DETAILED DESCRIPTION

[0046] The detailed description and technical contents of the present invention are described below with reference to the accompanying drawings. However, the drawings are only provided for reference and explanation and are not intended to limit the present invention.

[0047] Please refer to Figure 1 , is a cross-sectional view of the assembly structure of the cooled ball screw of the present invention. The present invention provides a cooled ball screw 1 comprising a screw 10, a first nut 20, a second nut 30, a pre-compression plate 40, and a plurality of contact components 50. The first nut 20 and the second nut 30 are threaded onto the screw 10; the contact components 50 are assembled onto the pre-compression plate 40, which is sandwiched between the first nut 20 and the second nut 30, thereby forming the cooled ball screw 1.

[0048] It should be noted that the cooling ball screw 1 of the present invention has a plurality of balls (not shown) disposed between the screw 10 and the first nut 20 and the second nut 30 .

[0049] Please refer to Figures 2 to 4 , are respectively a three-dimensional appearance diagram, a three-dimensional exploded diagram and a combined cross-sectional diagram of the cooling ball screw of the present invention after the screw is removed. Figure 2 As shown, the first nut 20 and the second nut 30 are connected to each other through the pre-pressing sheet 40 and the sealing components 50 .

[0050] Please also refer to Figure 3 and Figure 4 The first nut 20 has a first barrel 21 and a plurality of first cooling channels 22. The first barrel 21 has a first end surface 211, and the first end surface 211 is provided with a plurality of first docking holes 210 that communicate with the first cooling channels 22. In addition, the first docking holes 210 are arranged in a circular pattern at intervals on the first end surface 211, and the aperture of each first docking hole 210 is larger than the aperture of the first cooling channel 22 to which it communicates.

[0051] Similarly, the second nut 30 has a second barrel 31 and a plurality of second cooling channels 32. The second barrel 31 has a second end surface 311 facing the first nut 20, and the second end surface 311 is provided with a plurality of second docking holes 310 that connect to the second cooling channels 32. Furthermore, the second docking holes 310 are arranged in an annular pattern at intervals on the second end surface 311, and the diameter of each second docking hole 310 is larger than the diameter of the second cooling channel 32 to which it connects.

[0052] Furthermore, the pre-compression plate 40 is sandwiched between the first nut 20 and the second nut 30, and a plurality of sealing components 50 are combined with the periphery of the pre-compression plate 40. The assembly structure of the pre-compression plate 40 and the sealing components 50 will be described in more detail below.

[0053] It should be noted that in this embodiment, the pre-compression plate 40 is provided with a plurality of through-holes 41. Furthermore, the second nut 30 is provided with a plurality of screw holes 33 corresponding to these through-holes 41. The pre-compression plate 40 is coupled to the second nut 30 by a plurality of screws (not shown) passing through these through-holes 41 and screw holes 33.

[0054] It should be noted that the corresponding first cooling channel 22 , the first docking hole 210 , the second docking hole 310 , and the second cooling channel 32 are connected and located in a straight line.

[0055] Please refer to Figures 5 to 7 , are respectively a schematic diagram of the combination of the pre-pressed sheet and the close-fitting assembly of the present invention, a three-dimensional exploded schematic diagram of the close-fitting assembly and its exploded cross-sectional view. Figure 5 As shown, the sealing components 50 are spaced apart and arranged on the periphery of the pre-pressing plate 40. Furthermore, the periphery of the pre-pressing plate 40 is provided with a plurality of slots 42 corresponding to the positions of the first docking holes 210 and the second docking holes 310. Preferably, each slot 42 is a U-shaped slot.

[0056] Please refer to Figure 6 and Figure 7 Each of the sealing components 50 includes a sealing seat 51, an intermediate ring 52 disposed in the sealing seat 51, a first sealing ring 53 attached to one side of the intermediate ring 52 and facing the first nut 20, and a second sealing ring 54 attached to the other side of the intermediate ring 52 and facing the second nut 30.

[0057] It is worth noting that the intermediate ring body 52, the first close-fitting ring body 53 and the second close-fitting ring body 54 respectively have a through hole 500 with the same aperture. Moreover, the aperture of the through hole 500 is equal to the aperture of the first cooling channel 22 and the second cooling channel 32 (see FIG. Figure 4 ).

[0058] Furthermore, each of the sealing components 50 is disposed in each of the slots 42 of the pre-pressing plate 40 through the intermediate ring 52, and the first sealing ring 53 is inserted into each of the first docking holes 210 of the first nut 20. The second sealing ring 54 is inserted into each of the second docking holes 310 of the second nut 30.

[0059] Specifically, the close-fitting seat 51 includes a receiving groove 510 and two clamping plates 511 formed on opposite sides of the receiving groove 510. The intermediate ring body 52 is disposed in the receiving groove 510. The first close-fitting ring body 53 and the second close-fitting ring body 54 are respectively attached to opposite sides of the intermediate ring body 52 and clamped onto the two clamping plates 511.

[0060] Preferably, the close-fitting seat 51 is a U-shaped seat, and the top surface of the close-fitting seat 51 is provided with a plurality of grooves 512. These grooves 512 serve as points of force for removing the close-fitting assembly 50. Furthermore, each of the two clamping plates 511 is formed with a ring opening 513. A first annular groove 530 is provided around the periphery of the first close-fitting ring 53. Furthermore, a second annular groove 540 is provided around the periphery of the second close-fitting ring 54. Accordingly, the first close-fitting ring 53 is positioned within the ring openings 513 of the two clamping plates 511 via the first annular groove 530, and the second close-fitting ring 54 is positioned within the second annular groove 540.

[0061] Please continue to refer to Figure 8 , which is a cross-sectional view of the assembly of the present invention's close-fitting assembly. When assembling the close-fitting assembly 50 of the present invention, the intermediate ring 52 is first positioned within the close-fitting seat 51. The first and second close-fitting rings 53 and 54 are then attached to opposite sides of the intermediate ring 52 and positioned on the two clamping plates 511.

[0062] Please also refer to Figure 3 and Figure 4 After the sealing components 50 are respectively assembled to the pre-pressing piece 40, a portion of the first sealing ring 53 will protrude from one side of the sealing seat 51 and penetrate into the corresponding first docking hole 210. In addition, a portion of the second sealing ring 54 will protrude from the other side of the sealing seat 51 and penetrate into the corresponding second docking hole 310. Accordingly, the first nut 20 and the second nut 30 can be tightly combined by the arrangement of the pre-pressing piece 40 and the sealing components 50, thereby preventing the coolant injected into the first cooling channels 22 and the second cooling channels 32 from leaking.

[0063] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. An assembly structure of a cooling ball screw, characterized in that: include: a screw; a first nut screwed onto the screw, the first nut having a first barrel and a plurality of first cooling channels, the first barrel having a first end surface, the first end surface being provided with a plurality of first docking holes communicating with the first cooling channels; a second nut threadedly engaged with the screw rod, the second nut having a second cap barrel and a plurality of second cooling channels, the second cap barrel having a second end surface facing the first nut, the second end surface being provided with a plurality of second docking holes communicating with the second cooling channels; a pre-compression plate, sandwiched between the first nut and the second nut, wherein a periphery of the pre-compression plate is provided with a plurality of slots corresponding to the first docking holes and the second docking holes; and Multiple close-fitting components, each of the close-fitting components includes a close-fitting seat, an intermediate ring body arranged in the close-fitting seat, a first close-fitting ring body abutting the intermediate ring body and facing the first nut, and a second close-fitting ring body abutting the intermediate ring body and facing the second nut. Each of the close-fitting components is arranged in each of the slots through the intermediate ring body, and the first close-fitting ring body is inserted into each of the first docking holes, and the second close-fitting ring body is inserted into each of the second docking holes. The close-fitting seat includes a receiving groove and two plywood formed on opposite sides of the receiving groove. The intermediate ring body is arranged in the receiving groove, and the first close-fitting ring body and the second close-fitting ring body are respectively abutted on opposite sides of the intermediate ring body and clamped on the two plywood.

2. The assembly structure of the cooling ball screw according to claim 1, wherein: The first nut and the second nut are butted together through the pre-pressing sheet and the close-fitting components, and the corresponding first cooling channel, the first butting hole, the second butting hole and the second cooling channel are connected and located in a straight line.

3. The assembly structure of the cooling ball screw according to claim 1, wherein: The first docking hole spacing rings are arranged on the first end surface, and the aperture of each first docking hole is larger than the aperture of the connected first cooling channel; the second docking hole spacing rings are arranged on the second end surface, and the aperture of each second docking hole is larger than the aperture of the connected second cooling channel.

4. The assembly structure of the cooling ball screw according to claim 1, wherein: Each of the slots is a U-shaped slot.

5. The assembly structure of the cooling ball screw according to claim 1, wherein: The pre-pressing plate is provided with a plurality of through-holes, and the second nut is provided with a plurality of screw holes corresponding to the through-holes. The pre-pressing plate is combined with the second nut by a plurality of screws penetrating the through-holes and the screw holes.

6. The assembly structure of the cooling ball screw according to claim 1, wherein: The two splints are respectively formed with a ring opening, the periphery of the first close-fitting ring body is provided with a first ring groove, the periphery of the second close-fitting ring body is provided with a first ring groove, the first close-fitting ring body is positioned in the ring openings of the two splints through the first ring groove and the second close-fitting ring body is positioned in the ring openings of the two splints through the second ring groove.

7. The assembly structure of the cooling ball screw according to claim 1, wherein: The first close-contact ring body protrudes from one side of the close-contact seat and penetrates into the corresponding first docking hole, and the second close-contact ring body protrudes from the other side of the close-contact seat and penetrates into the corresponding second docking hole.

8. The assembly structure of the cooling ball screw according to claim 1, wherein: The close-fitting seat is a U-shaped seat body, and a top surface of the close-fitting seat is provided with a plurality of grooves.

9. The assembly structure of the cooling ball screw according to claim 1, wherein: The middle ring body, the first close-fitting ring body and the second close-fitting ring body respectively have a through hole with the same aperture, and the aperture of the through hole is equal to the aperture of the first cooling channel and the second cooling channel.

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