TWI708654B - Throttle and hydrostatic linear slide rail using it - Google Patents

Abstract

The present invention relates to a flow restrictor, which has a spiral flow channel, an axial flow channel and a radial flow channel between the spiral flow channel and the axial flow channel. The spiral flow channel is arranged in the section. The outer peripheral surface of the restrictor extends in the direction away from the radial flow passage along the axial direction of the restrictor. The axial flow passage extends from the front end surface of the restrictor to the radial flow passage along the axial direction of the restrictor. The flow channel extends from the outer peripheral surface of the restrictor inward along the radial direction of the restrictor, and its two ends connect the axial flow channel and the spiral guide groove, which can achieve the purpose of easy manufacture and convenient installation, and can provide Good and stable throttling effect. In addition, the present invention further provides a hydrostatic linear slide rail using the aforementioned throttle.

Description

Throttle and hydrostatic linear slide rail using it

The present invention relates to linear slides, and particularly refers to a throttle and a hydrostatic linear slide using the throttle.

The so-called hydrostatic linear slide rail mainly uses a certain pressure to fill the lubricating oil in the oil cavity of the slider, so that the slider penetrates the oil film formed by the lubricating oil and moves smoothly along the track in a frictionless state.

In order to increase the load-bearing rigidity and stability of the oil film, the current traditional method is to install a capillary restrictor between the pressure supply end and the oil cavity, and the capillary restrictor provides a throttling effect to the lubricating oil. However, in order to save installation space, the capillary restrictor is usually wound manually first, which not only takes more time, but also has a high failure rate. In addition, the capillary restrictor is a tube with a great slenderness ratio. In addition to the difficulty in manufacturing, it is also easy to accidentally damage the structure during the winding process, thereby affecting the throttling effect.

The main purpose of the present invention is to provide a throttle, which is easy to manufacture and easy to install, and can achieve a good and stable throttle effect.

In order to achieve the above-mentioned main purpose, the restrictor of the present invention includes a spiral flow channel, an axial flow channel and a radial flow channel between the spiral flow channel and the axial flow channel. The two ends of the flow channel respectively connect the rear end of the axial flow channel and the front end of the spiral guide groove.

It can be seen from the above that the restrictor of the present invention can not only overcome the difficulties caused by the large slenderness ratio of the prior art in traditional manufacturing, but also effectively solve the problems caused by the bending and deformation of the prior art in use. In other words, the throttle of the present invention can achieve the effects of being easy to manufacture and convenient to install, and can provide a good and stable throttle effect.

Preferably, the restrictor has a head and a cylindrical body. The head has a front end surface and a rear end surface, the cylindrical body has a front end and a rear end, the front end of the cylindrical body is connected to the rear end surface of the head, and the spiral guide groove is from the cylindrical body The front end extends along the axial direction of the cylindrical body to the rear end of the cylindrical body, and the axial flow passage extends from the front end surface of the head into the cylindrical body along the axial direction of the cylindrical body , The radial flow channel extends inwardly along the radial direction of the cylindrical body from the outer peripheral surface of the cylindrical body.

Preferably, the outer diameter of the head of the restrictor may be greater than or equal to the outer diameter of the cylindrical body of the restrictor.

Preferably, the head of the restrictor is cylindrical, and the outer peripheral surface of the head of the restrictor has threads, so that the restrictor of the present invention can be assembled by screwing.

Preferably, the head of the restrictor and the cylindrical body of the restrictor can be an integral structure, or assembled in a screwed manner to form a two-piece structure.

Preferably, the cylindrical body of the throttle further has a connecting section and a diversion section, the front end of the connecting section is connected to the rear end surface of the head, and the rear end of the connecting section is connected to the front end of the diversion section. The diversion section is provided with the spiral diversion groove and the radial flow channel, as for the axial flow channel extends from the front end surface of the head along the axial direction of the cylindrical body into the connecting section of the cylindrical body .

In addition, the present invention further provides a hydrostatic linear slide rail using the aforementioned restrictor, which includes a rail, a slider, and an end cover group. The left and right sides of the rail are respectively provided with a first load surface; the slider has a first end surface, a second end surface, and a sliding groove penetrating the first end surface and the second end surface, and the sliding groove It is slidably arranged on the track. In addition, the slider has a second load surface on the left and right sides of the chute, each of the second load surfaces faces one of the first load surfaces of the rail, and each of the The second load surface has an oil cavity for filling lubricating oil. The sliding block has a containing groove and an oil outlet channel on the left and right sides of the sliding groove respectively. Each of the containing grooves is from the first end surface of the sliding block. Extending along the extending direction of the sliding groove to the direction of the second end surface of the sliding block, one end of each of the oil outlet channels is connected to the containing groove, and the other end of each of the oil outlet channels is connected to an oil cavity. When used in conjunction with the aforementioned restrictor, the number of each restrictor used is at least two, a part of each restrictor is provided on the first end cover, and the other part is provided on one of the sliders. In the groove, the axial flow channel of each throttle is connected to one of the oil inlet channels of the slider, and a curved flow is formed between the spiral guide groove of each throttle and the pocket of the slider The back end of the curved channel is connected to one of the oil outlet channels of the slider.

Thereby, when the pressure source injects lubricating oil into the oil inlet passage, the lubricating oil will flow from the oil inlet passage through the axial flow passage and the radial flow passage in sequence, and then along the spiral guide groove and The curvilinear flow channel formed by the pocket realizes the throttling effect, and finally reaches the oil cavity through the oil outlet channel, so that the lubricating oil passes through the oil cavity on the first load surface of the track and the second load of the slider An oil film is formed between the surfaces.

The detailed structure, characteristics, assembling or use method of the restrictor and the hydrostatic linear slide rail using the restrictor provided by the present invention will be described in the detailed description of the subsequent embodiments. However, those with ordinary knowledge in the field of the present invention should be able to understand that these detailed descriptions and specific examples for implementing the present invention are only used to illustrate the present invention, and are not intended to limit the scope of the patent application of the present invention.

The applicant first explains here that throughout the specification, including the following embodiments and claims in the scope of the patent application, the nouns related to directionality are based on the directions in the drawings. Secondly, in the following embodiments and drawings, the same element numbers represent the same or similar elements or structural features.

Please refer to FIG. 1 and FIG. 2, the hydrostatic linear slide 10 of the present invention includes a rail 20, a sliding block 30, an end cover group 40 and four restrictors 50.

The left and right sides of the rail 20 respectively have two first load surfaces 22 that are symmetrical up and down.

The slider 30 has a first end surface 31, a second end surface 32, and a sliding groove 33 penetrating through the first end surface 31 and the second end surface 32. The sliding groove 33 is provided on the rail 20 so that the slider 30 can move along The track 20 slips. As shown in Figure 2, the left and right sides of the slider 30 respectively have two second load surfaces 34 that are symmetrical up and down, and each second load surface 34 has an oil cavity 35 for filling lubricating oil (as shown in Figure 4). (Shown), the four second load surfaces 34 of the slider 30 face the four first load surfaces 22 of the rail 20 in a one-to-one manner. In addition, as shown in FIG. 4, the left and right sides of the slider 30 respectively have two upper and lower parallel grooves 36. Each groove 36 extends from the first end surface 31 of the slider 30 along the extending direction of the sliding groove 33. The sliding block 30 extends in the direction of the second end surface 32, and one end of each accommodating groove 36 is connected to an oil cavity 35 via an oil outlet channel 37.

The end cover group 40 has a first end cover 41 and a second end cover 44. The first end cover 41 is fixed to the first end surface 31 of the slider 30 using fixing elements such as screws, and the second end cover 44 is also fixed to the second end surface of the slider 30 using fixing elements such as screws. 32. As shown in FIG. 2, the first end cover 41 has four screw holes 42 facing one side of the slider 30, and each screw hole 42 corresponds to a pocket 36 of the slider 30, and the left and right sides of the first end cover 41 There are one oil inlet passage 43 respectively, as shown in FIG. 3, each oil inlet passage 43 extends downward from the top surface of the first end cover 41 and communicates with two screw holes 42 at the same time.

In this embodiment, the restrictor 50 is an integral structure made by machining. The restrictor 50 includes a head 51 and a cylindrical body 53, as shown in FIGS. 5 and 6, the head 51 is cylindrical and has a front end surface 512 and a rear end surface 514. The outer circumference of the head 51 The face has threads 52. In this embodiment, the outer diameter of the cylindrical body 53 is smaller than that of the head 51. The cylindrical body 53 has a front end 532 and a rear end 534. The front end 532 of the cylindrical body 53 is connected to the back of the head 51. The end surface 514. Furthermore, the cylindrical body 53 has a connecting section 54 and a diversion section 55. The front end of the connecting section 54 (that is, the front end 532 of the cylindrical body 53) is connected to the rear end surface 514 of the head 51, The rear end of the connecting section 54 is connected to the front end of the guide section 55, wherein a spiral guide groove 56 is provided on the outer peripheral surface of the guide section 55, and the spiral guide groove 56 extends from the front end of the guide section 55 along the cylindrical body 53 It extends axially to the rear end of the diversion section 55 (that is, the rear end 534 of the cylindrical body 53). In addition, as shown in FIG. 6, the restrictor 50 of the present invention further includes an axial flow passage 57 and a radial flow passage 58. The axial flow passage 57 extends from the front end surface 512 of the head 51 along the cylindrical body. The axial direction of 53 extends back to the connecting section 54 of the cylindrical body 53, the cross-sectional area of the radial flow channel 58 is larger than the cross-sectional area of the spiral guide groove 56, and the radial flow channel 58 is located in the guide section of the cylindrical body 53 The front end of 55 extends from the outer peripheral surface of the guide section 55 of the cylindrical body 53 inward along the radial direction of the cylindrical body 53, and its two ends respectively communicate with the spiral guide groove 56 and the axial flow passage 57.

Please continue to refer to FIG. 3, the head 51 of the restrictor 50 is fixed in the screw hole 42 of the first end cover 41 by screwing, so that the axial flow passage 57 of the restrictor 50 is connected to the first end cover 41 The oil inlet passage 43, as for the cylindrical body 53 of the restrictor 50, penetrates the receiving groove 36 of the slider 30, so that a line is formed between the spiral guide groove 56 of the restrictor 50 and the receiving groove 36 of the slider 30 The curved flow channel 60 is connected to the oil outlet channel 37 of the slider 30 at the rear end of the curved flow channel 60.

It can be seen from the above that when the pressure source injects lubricating oil into the oil inlet passage 43 of the first end cover 41, the lubricating oil will flow from the oil inlet passage 43 of the first end cover 41 to the axial flow passage 57 of the throttle 50. Then it flows from the axial flow passage 57 of the restrictor 50 to the radial flow passage 58 of the restrictor 50, and then along the spiral guide groove 56 of the restrictor 50 and the receiving groove 36 of the slider 30. The curvilinear flow passage 60 achieves the throttling effect, and finally reaches the oil cavity 35 of the slider 30 through the oil outlet channel 37 of the slider 30, so that the lubricating oil penetrates the oil cavity 35 on the first load surface 22 of the rail 20 and the slider 30 An oil film is formed between the second load surfaces 34. In addition, in the aforementioned process, the pressure when the lubricating oil reaches the oil chamber 35 after throttling is 0.45 to 0.55 times that of the supply pressure.

On the other hand, the structure of the throttle of the present invention can have various changes. In the second embodiment of the present invention, the outer diameter of the head 71 of the restrictor 70 is equal to the outer diameter of the cylindrical body 72 of the restrictor 70, as shown in FIG. 7, which makes the processing of the restrictor 70 more convenient . In addition, in the third embodiment of the present invention, the restrictor 80 is a two-piece structure made by mechanical processing. As shown in FIG. 8, the head 81 of the restrictor 80 has a screw penetrating through the front and rear ends. Hole 82, the front end of the cylindrical body 83 of the restrictor 80 is provided with an external thread, so that the cylindrical body 83 of the restrictor 80 is screwed to the head 81 of the restrictor 80. In addition, the axial flow The passage 84 extends from the front end surface of the cylindrical body 83 along the axial direction of the cylindrical body 83 to communicate with the radial flow passage 85. As for how the throttles 70 and 80 of the above two embodiments are assembled with the slider 30 and the first end cover 41 are the same as in the first embodiment, in order to save space, it will not be repeated here.

In summary, the restrictors 50, 70, and 80 provided by the hydrostatic linear slide 10 of the present invention are made by mechanical processing, and have a fairly high uniformity and stability in terms of structure. It overcomes the difficulties in the manufacturing of the prior art due to the extremely large slenderness ratio, and can effectively solve various problems caused by the bending deformation of the prior art during winding. In other words, the restrictors 50, 70, 80 provided by the hydrostatic linear slide 10 of the present invention have the characteristics of being easy to manufacture and convenient to install, and can provide a good and stable throttling effect.

10: Hydrostatic linear slide 20: Orbit 22: The first load surface 30: Slider 31: The first end face 32: second end face 33: Chute 34: second load surface 35: oil cavity 36: Tolerance 37: oil outlet channel 40: end cap group 41: first end cap 42: screw hole 43: oil inlet channel 44: second end cap 50: throttle 51: head 512: Front face 514: rear face 52: Thread 53: Cylindrical Body 54: connection segment 55: Diversion section 56: spiral guide groove 57: Axial flow channel 58: Radial flow channel 60: Curved runner 70: throttle 71: head 72: Cylindrical Body 80: throttle 81: head 82: screw hole 83: Cylindrical Body 84: Axial flow channel 85: Radial flow channel

Figure 1 is a perspective view of the hydrostatic linear slide rail of the present invention. Figure 2 is a partial three-dimensional exploded view of the hydrostatic linear slide rail of the present invention. Figure 3 is a cross-sectional view of the hydrostatic linear slide of the present invention. Figure 4 is a cross-sectional view taken along line 4-4 in Figure 2; Fig. 5 is a perspective view of the restrictor of the first embodiment of the present invention. Figure 6 is a cross-sectional view taken along line 6-6 in Figure 5; Fig. 7 is a perspective view of a restrictor according to a second embodiment of the present invention. Fig. 8 is an exploded perspective view of the throttle of the third embodiment of the present invention.

50: throttle

51: head

512: front end

52: Thread

53: Cylindrical Body

54: connection segment

55: Diversion section

56: spiral guide groove

57: Axial flow channel

58: Radial flow channel

Claims (10)

A restrictor, comprising a spiral flow channel, an axial flow channel, and a radial flow channel between the spiral flow channel and the axial flow channel, the spiral flow channel being provided on the throttle The outer peripheral surface extends along an axial direction away from the radial flow passage, the axial flow passage extends from an end surface of the restrictor along the axial direction to the radial flow passage, and the radial flow passage extends from The outer peripheral surface of the restrictor extends inward along a radial direction and communicates with the axial flow channel and the spiral guide groove with its two ends; the restrictor also includes a head and a cylindrical body, the head The cylindrical body has a front end and a rear end. The front end of the cylindrical body is connected to the rear end of the head. The spiral guide groove is provided in the cylindrical body. The outer peripheral surface, and the spiral guide groove extends from the front end of the cylindrical body along the axial direction of the cylindrical body to the rear end of the cylindrical body, and the axial flow channel runs along the front end of the head The cylindrical body axially extends into the cylindrical body, and the radial flow channel extends inwardly from the outer peripheral surface of the cylindrical body along the radial direction of the cylindrical body. The throttle according to claim 1, wherein the outer diameter of the head is equal to the outer diameter of the cylindrical body. The restrictor according to claim 2, wherein the head is cylindrical, and the outer peripheral surface of the head has threads. The throttle according to claim 1, wherein the outer diameter of the head is greater than the outer diameter of the cylindrical body. The throttle according to claim 4, wherein the front end of the cylindrical body is integrally connected to the rear end of the head. The throttle according to claim 1, wherein the cylindrical body further has a connecting section and a diversion section, the front end of the connecting section is connected to the rear end surface of the head, and the rear end of the connecting section is connected to the diversion section The front end of the section; the spiral flow channel is provided in the flow guide section, the radial flow channel is provided at the front end of the flow guide section, and the axial flow channel is along the axis of the cylindrical body from the front end of the head Extend into the connecting section of the cylindrical body. The restrictor according to claim 1, wherein the cross-sectional area of the radial flow channel is greater than the cross-sectional area of the spiral guide groove. A restrictor, comprising a spiral flow channel, an axial flow channel, and a radial flow channel between the spiral flow channel and the axial flow channel, the spiral flow channel being provided on the throttle The outer peripheral surface extends along an axial direction away from the radial flow passage, the axial flow passage extends from an end surface of the restrictor along the axial direction to the radial flow passage, and the radial flow passage extends from The outer peripheral surface of the restrictor extends inward along a radial direction and communicates with the axial flow channel and the spiral guide groove with its two ends; the restrictor also includes a head and a cylindrical body, the head The part has a front end surface, a back end surface, and a screw hole penetrating the front end surface and the rear end surface. The cylindrical body has a front end and a rear end. The front end of the cylindrical body is connected to the head in a screwed manner. The screw hole of the cylindrical body, the spiral guide groove is provided on the outer peripheral surface of the cylindrical body and extends along the axial direction of the cylindrical body to the rear end of the cylindrical body, and the axial flow channel is from the cylindrical body A front end surface of the body extends toward the radial flow channel along the axial direction of the cylindrical body, and the radial flow channel extends inwardly from the outer peripheral surface of the cylindrical body along the radial direction of the cylindrical body. The restrictor according to claim 8, wherein the cross-sectional area of the radial flow channel is greater than the cross-sectional area of the spiral guide groove. A hydrostatic linear slide rail, comprising: a rail, the left and right sides of the rail are respectively provided with a first load surface; a sliding block with a first end surface, a second end surface and a penetrating through the first end surface and The sliding groove of the second end surface, the sliding block is slidably arranged on the track by the sliding groove, the sliding block has a second load surface on the left and right sides of the sliding groove, and each second load surface is respectively Facing one of the first load surfaces of the track, and each of the second load masks has an oil cavity, the sliding block has a groove and an oil outlet respectively on the left and right sides of the sliding groove, each of the grooves Extending from the first end surface of the slider along the extending direction of the sliding groove to the direction of the second end surface of the slider, one end of each oil outlet channel is connected to a groove, and the other end of each oil outlet channel is connected An oil cavity; an end cover group, having a first end cover and a second end cover, the first end cover is arranged on the first end surface of the slider and has two oil inlet channels, the second end cover is arranged in The second end surface of the slider; and two restrictors according to any one of claims 1 to 9, which are arranged in the first end cover and the two accommodating grooves of the slider, each of the restrictors The axial flow passage is connected to one of the oil inlet channels of the slider, and a curved flow passage is formed between the spiral guide groove of each throttle and the receiving groove of the slider, and the back end of the curved flow passage is connected to the One of the sliders should be the oil outlet channel.

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