TWI690662B - Linear slide rail capable of detecting abnormal backflow - Google Patents

Abstract

The invention relates to a linear slide rail, which includes a rail and a slider, the slider is arranged on the rail and forms a load channel with the rail, the slider itself has two non-load channels, in addition, the two of the slider are opposite The end faces are respectively provided with a first end cap and a second end cap. The first end cap itself has two first return slots, the second end cap has a return element and a sealing sheet, and the return element has two second return slots, The load channel, the non-load channel, the first return groove and the second return groove together form a circulation channel for the ball to run, and a force sensor is provided between the return element and the sealing sheet. In this way, the linear slide rail of the present invention utilizes the difference in rigidity between the first end cap and the second end cap in conjunction with the force sensor to determine whether there is any abnormality in the operation of the ball.

Description

Linear slide rail capable of detecting abnormal backflow

The invention relates to a linear slide rail, in particular to a linear slide rail capable of detecting abnormal conditions of return flow.

The traditional linear slide rail includes a track and a slider sliding on the track, wherein an end cover is provided at the front and rear ends of the slide, so that the track, the slider and the two end covers form a common For circulation channels for the operation of multiple balls.

In order to ensure the smooth running of the balls, sensors have been used in the prior art to sense whether there is abnormality of reflow. For example, US Patent No. 7,178,981 uses a sensor to sense the change in force between the end cap and the slider, but because sensors are required at both ends, plus the end cap itself has a certain rigidity, Therefore, it is not easy to accurately sense the problem of the end cover. In addition, the Japanese patent case JPA_2012193803 puts the sensor outside the end cap. When the end cap is too swollen and hits the sensor, it can be judged that the end cap is abnormal, but in this way, the sensor needs to be adjusted at the installation position It’s very accurate to achieve the desired effect.

The main purpose of the present invention is to provide a linear slide rail, which can instantly sense whether there is abnormal flow back.

In order to achieve the above main objective, the linear slide rail of the present invention includes a rail, a slider, a first end cap, a second end cap, a plurality of balls, and a force sensor. The outer peripheral surface of the slide rail has two opposite outer rolling grooves; the slider has a first end surface, a second end surface opposite to the first end surface, and a slide groove penetrating the first end surface and the second end surface, the The sliding block is slidably provided on the track by the sliding groove, and the groove wall of the sliding groove has two inner rolling grooves opposed to each other. The inner rolling groove of the slider corresponds to the outer rolling groove of the track and is connected to the track The outer rolling groove forms a load channel. In addition, the slider further has two non-load channels opposite to each other, each of which passes through the first end surface of the slider and the second end surface of the slider; the first end cover is provided with On the first end surface of the slider, and the first end cover is provided with two first return grooves opposite to each other in an integrally formed manner, the two first return grooves are respectively connected to one ends of the load channel; the second end cover The utility model has a cover body, a reflow element and a sealing piece. The cover body is arranged on the second end surface of the slider. The reflow element is arranged in the cover body and has two second reflow grooves opposite to each other. The grooves are respectively connected to the other end of the load channel, so that the load channel, the non-load channel, a first return channel and a second return channel together form a circulation channel for the balls to run; the force sensor It is arranged between the return element of the second end cap and the sealing piece of the second end cap to sense the force condition when the second end cap is hit by the balls.

It can be seen from the above that the first end cover is an integrated structure and the second end cover is a multi-piece structure. The linear slide rail of the present invention utilizes the difference in rigidity between the first end cover and the second end cover, and A force sensor is arranged on the reflow element of the second end cover, so that the force signal when the second end cover is hit by the balls can be accurately sensed, thereby effectively judging whether there is an abnormal situation in the reflow in real time .

Furthermore, the reflow element has a body and two opposite extensions, the two extensions extend integrally from the inner side of the body and each have a return groove, as for the force sensor is located in The outer side of the body, for example, is located at a position corresponding to the two second return grooves so as to be able to sense the force signal at the turning point, or the force sensor can be designed to have the same shape as the body, The force sensor can cover the outer end surface of the body except the top edge, so that the sensing range can be expanded to improve the accuracy.

The detailed structure, characteristics, assembly or use of the linear slide rail provided by the present invention will be described in the detailed description of the subsequent embodiments. However, those of ordinary knowledge in the field of the present invention should be able to understand that these detailed descriptions and specific embodiments listed 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 states here that throughout the specification, including the embodiments described below and the claims in the scope of patent application, the directional terms are based on the directions in the drawings. Secondly, in the embodiments and drawings to be described below, the same element numbers represent the same or similar elements or their structural features.

Please refer to FIGS. 1, 2 and 4, the linear slide rail 10 of the first embodiment of the present invention includes a rail 20, a slider 30, a first end cap 40, a second end cap 50, and a plurality of balls 60 , And two power sensors 70.

The two opposite sides of the track 20 bis have two upper and lower outer rolling grooves 22 respectively.

The slider 30 has a first end surface 31, a second end surface 32 opposite to the first end surface 31, and a sliding slot 33 penetrating the first end surface 31 and the second end surface 32. The slider 30 is provided on the rail 20 with the sliding slot 33. The slider 30 can slide along the track 20. The two opposite sides of the groove wall of the chute 33 respectively have two upper and lower inner rolling grooves 34, and the inner rolling groove 34 of the slider 30 corresponds to the rolling groove 22 outside the track 20 in a one-to-one manner, so that there is A load channel 62 is formed (as shown in Figure 4). In addition, the slider 30 has two non-load channels 35 vertically opposed to each other on the opposite outer sides of the sliding groove 33. Each non-load channel 35 penetrates the first end surface 31 of the slider 30 and the second end surface 32 of the slider 30.

The first end cover 40 is an integrated structure. The first end cover 40 is assembled to the first end surface 31 of the slider 30 using a fixing element (not shown) such as a screw, and as shown in FIG. 2, the two opposite sides of the inner end surface of the first end cover 40 There are two first return grooves 42 opposite to each other, and the two ends of the first return groove 42 are respectively connected to one end of the load channel 62 and the non-load channel 35 (as shown in FIG. 4 ).

The second end cover 50 is a multi-piece structure. More specifically, as shown in FIG. 2, the second end cover 50 has a cover body 51, a return element 52 and a sealing piece 56, wherein: the cover body 51 resists Relying on the second end surface 32 of the slider 30; the reflow element 52 is disposed in the cover 51, and the reflow element 52 has a body 53 and two opposite extensions 54 which are integrated from the inner end surface of the body 53 Extending from the ground and having two second return grooves 55 facing each other vertically, the two ends of each second return groove 55 respectively connect the other ends of the load channel 62 and the non-load channel 35 (as shown in FIG. 4), so that The first return groove 42, the second return groove 55, the load channel 62 and the non-load channel 35 together form a circulation channel 64 for the balls 60 to operate (as shown in FIG. 4 ); the sealing piece 56 is provided on the cover 51 The outer end face is assembled to the second end face 32 of the slider 30 together with the cover 51 using a fixing element (not shown) such as a screw, and the return element 52 is covered.

The number of the force sensors 70 is two in this embodiment. As shown in FIGS. 2 to 4, the two force sensors 70 are disposed between the body 53 of the reflow element 52 and the sealing piece 56 and correspond to one The second return groove 55, so that the force sensors 70 can instantly sense the force condition when the return element 52 is hit by the balls 60.

It can be seen from the above that when the running resistance of the ball 60 is abnormal, the deformation and displacement of the second end cap 50 will squeeze the force sensor 70, so that the force sensor 70 measures a force signal, and then the force The sensor 70 transmits the measured force signal to a control module 72 disposed in the cover 51 and located above the return element 52 for analysis. This force signal will increase as the running resistance increases Increase, once the threshold is exceeded, the relevant components must be replaced, in order to achieve the effect of pre-determining whether there is a problem with the backflow.

On the other hand, in the aforementioned first embodiment, the force sensor 70 is provided at a position corresponding to the second return tank 55. In the second embodiment of the present invention, the two force sensors 70 are integrated into one and The outer shape is designed to be the same as the body 53 of the reflow element 52, as shown in FIGS. 5 to 7, so that the force sensor 70 covers the outer end of the body 53 except the top edge, so that the sensing can be expanded Range to improve sensing accuracy.

In summary, the linear slide rail 10 of the present invention utilizes the difference in rigidity between the first end cap 40 and the second end cap 50, and a force sensor 70 is provided on the return element 52 of the second end cap 50, thereby Amplifying the impact force received by the second end cap 50 when the ball 60 is not running smoothly, compared with the prior art, it can determine the state of the reflow more accurately, and thus achieve the effect of pre-diagnosis.

10: Linear slide 20: Orbit 22: outer rolling groove 30: Slider 31: First end 32: Second end face 33: Chute 34: inner rolling groove 35: Non-load channel 40: first end cover 42: First reflux tank 50: second end cover 51: Cover 52: Reflow element 53: Ontology 54: Extension 55: Second reflux tank 56: sealing sheet 60: Ball 62: load channel 64: circulation channel 70: Power sensor 72: control module

FIG. 1 is a perspective view of the appearance of a linear slide rail according to a first embodiment of the invention. FIG. 2 is a three-dimensional exploded view of the linear slide rail omitting balls in the first embodiment of the present invention. FIG. 3 is an end view of the linear slide rail omitting the sealing sheet according to the first embodiment of the present invention. Figure 4 is a cross-sectional view of a linear slide rail according to the first embodiment of the present invention. FIG. 5 is a partial exploded view of a linear slide rail according to the second embodiment of the present invention. Figure 6 is an end view of the linear slide rail of the second embodiment of the present invention omitting the sealing sheet. Figure 7 is a partial cross-sectional view of a linear slide rail according to a second embodiment of the present invention.

20: Orbit

30: Slider

31: First end

32: Second end face

33: Chute

34: inner rolling groove

35: Non-load channel

40: first end cover

42: First reflux tank

50: second end cover

51: Cover

52: Reflow element

53: Ontology

54: Extension

56: sealing sheet

70: Power sensor

72: control module

Claims (5)

A linear slide rail includes: a track with two opposite outer rolling grooves on the outer peripheral surface; a slider with a first end surface, a second end surface opposite to the first end surface, and a penetrating the first The sliding grooves of the end surface and the second end surface, the slider is slidably provided on the track with the sliding groove, the groove wall of the sliding groove has two opposite inner rolling grooves, and the inner rolling groove of the slider corresponds to the The rolling groove outside the track forms a load channel with the rolling groove outside the track, and the slider further has two opposite non-load channels, each of which passes through the first end surface of the slider and the second end surface of the slider A first end cover is provided on the first end surface of the slider, the first end cover has two opposed first return grooves, the two first return grooves respectively connect one end of the load channel and a non-load channel A second end cap with a cover body, a return element and a sealing piece, the cover body is provided on the second end surface of the slider, the return element is provided in the cover body and has two opposite second return grooves , The two second return tanks are respectively connected to the other end of the load channel and a non-load channel, so that the load channel, the non-load channel, a first return channel and a second return channel together form a circulation channel, The sealing piece is provided on an end surface of the cover body facing away from the slider and covering the return element; a plurality of balls are provided in the two circulation channels; and more than one force sensor is provided on the second end cover Between the return element and the sealing piece of the second end cap. The linear slide rail according to claim 1, wherein the return element has a body and two opposite extensions, the two extensions integrally extend from an inner end surface of the body and respectively have a second return groove , The force sensor is disposed between the body and the sealing sheet. The linear slide rail according to claim 2, wherein the shape of the force sensor matches the shape of the body, and the force sensor covers the outer end surface of the body. The linear slide rail according to claim 2, wherein the outer end surface of the body is respectively provided with a force sensor at a position corresponding to the two second return grooves. The linear slide rail according to claim 1, wherein the force sensor is electrically connected to a control module, and the control module is disposed in the cover body of the second end cover and above the return element.

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