High-precision reciprocating winding displacement device of pull rope sensor

Abstract

The utility model relates to a high-precision reciprocating winding displacement device of a pull rope sensor. The pull rope sensor comprises a shell composed of an upper shell and a lower shell and an encoder arranged on the shell. The winding wheel is arranged in the shell and coaxially rotates with the encoder, the reciprocating winding displacement device is arranged opposite to the winding wheel, one end of a steel wire rope is fixed on the winding wheel and wound, and the other end of the steel wire rope penetrates through the reciprocating winding displacement device and extends out of the shell. Compared with the prior art, the utility model has the advantages of improved winding consistency, simple structure, low cost, small volume, reliability, stability and the like.

Description

Technical Field

[0001] The utility model relates to the field of drawstring sensors, in particular to a high-precision reciprocating wire arranging device for a drawstring sensor. Background Technique

[0002] For a common type of drawstring sensor on the market, no treatment is done when the steel rope is pulled out and retracted, and the steel rope on the wire reel is randomly arranged, resulting in low performance of the drawstring sensor, and the larger the measuring range, the worse the accuracy; for another type of drawstring sensor, when the steel rope is pulled out or retracted, the wire harness is arranged neatly, but the core of this type of drawstring sensor adopts a reciprocating lead screw or threaded screw structure. Using such a structure has a large volume, cannot be miniaturized, and is very difficult in machining, resulting in high costs and inability to reduce costs.

[0003] Chinese Patent CN220418357U discloses an active wire arranging multi-turn absolute draw wire displacement sensor, which moves up and down on the transmission shaft two through the thread of the transmission shaft one, driving the up and down movement of the wire reel to meet the adjustment requirements of the angle relationship between the drawstring and the wire outlet during wire out, so as to improve the situation of overlapping and disorderly winding of the drawstring on the wire reel and improve the measurement accuracy. However, it adopts a threaded screw structure with a large volume and can only reciprocate once for wire arranging.

[0004] Chinese Patent CN219859863U discloses a vibration sensor with a connecting wire winding mechanism. Through the linkage between the wire winding roller and the side gear, the main gear, the worm, the worm gear, the reciprocating lead screw, and the slider, while the wire winding roller winds the signal connecting wire, the two wire arranging tubes move reciprocally towards each other, and the wire arranging tubes play a guiding role for the corresponding signal connecting wires, so that the corresponding signal connecting wires are evenly and neatly arranged on the wire winding roller. However, it adopts a wire arranging method of a reciprocating lead screw cooperating with a slider, with a large volume, unable to be miniaturized and transplanted, and the machining is still relatively difficult. Content of the Utility Model

[0005] To solve the technical problems in the background technique, the utility model provides a high-precision reciprocating wire arranging device for a drawstring sensor. The device and the wire reel are jointly arranged in a housing, and an encoder connected to the wire reel shaft is arranged on the housing. The device further includes:

[0006] Linkage structure: including a first gear arranged on the outer edge of the wire reel and rotating synchronously with the wire reel, a second gear meshing with the first gear, a worm rotating together with the second gear, and a worm gear cooperating with the worm. The worm gear is fixed on the worm gear shaft;

[0007] The reciprocating wire arrangement structure includes a reciprocating body, a half-tooth gear arranged in the reciprocating body and connected to the worm shaft, and a wire tube arranged on the reciprocating body. The steel wire wound on the winding wheel shaft passes through the wire tube and then extends out from the wire outlet on the shell.

[0008] Furthermore, the reciprocating body is composed of a rack and a reversing guide plate, the reversing guide plate is composed of a first sub-plate and a second sub-plate arranged parallel to each other, the rack is composed of a first rack and a second rack arranged parallel to each other, and is fixed to the first sub-plate and the second sub-plate respectively by screws.

[0009] Furthermore, the first sub-plate and the second sub-plate have the same structure, and reversing guide grooves are respectively provided therein, and the worm gear shaft passes through the reversing guide groove of the first sub-plate, the half-tooth gear and the reversing guide groove of the second sub-plate in sequence.

[0010] Furthermore, the wire tube is arranged on the second sub-plate, and a groove for avoiding the worm gear shaft is opened at the position of the reversing guide groove of the second sub-plate.

[0011] Furthermore, a reversing guide groove is provided on the first sub-plate, and the worm gear shaft passes through the reversing guide groove and extends into the reciprocating body and is connected with the half-tooth gear through a key.

[0012] Furthermore, the wire tube is arranged on the second sub-plate, one end of the wire rope is fixed on the winding wheel, and the other end is extended through the wire outlet on the shell after winding out of the winding wheel and passing through the wire hole of the wire tube.

[0013] Furthermore, the outlet of the wire hole is directly opposite to the wire outlet on the shell, and the inlet of the wire hole is arranged tangentially to the winding wheel.

[0014] Furthermore, lubricating oil is coated in the wire hole, and a brush is arranged at the outlet of the wire hole.

[0015] Furthermore, the first rack and the second rack are processed with missing teeth at the edges along the rotation direction of the half-toothed gear.

[0016] Furthermore, the linkage structure also includes a worm shaft and a worm wheel shaft mounting seat arranged on the housing, the worm is arranged at the top end of the worm shaft, the bottom end of the worm shaft passes through the second gear and is rotatably connected to the housing, and one end of the worm wheel shaft is rotatably mounted on the worm wheel shaft mounting seat through a bearing.

[0017] The utility model improves the winding uniformity of the pull-wire sensor through the reciprocating wire arrangement structure. Compared with the prior art, the utility model has the following advantages:

[0018] 1. Improve the consistency of wire winding, enhance the repeatability of the draw-wire sensor, and compensate through a simple software algorithm to improve the accuracy of the draw-wire sensor;

[0019] 2. Compared with the structure of a reciprocating lead screw, it is simpler to process and has lower complexity, so the manufacturing cost is lower;

[0020] 3. Due to the relatively simple structure, the volume of the draw-wire sensor can be reduced, expanding the application scenarios of the draw-wire sensor;

[0021] 4. Uniform wire winding not only reduces the mutual friction between steel wires, extends the service life of the draw-wire sensor, but also improves the stability of the overall structure, making the draw-wire sensor more reliable and stable, and reducing the system error rate of using this sensor. Description of the Drawings

[0022] Figure 1 Installation schematic diagram of the high-precision reciprocating wire arranging device of the present utility model;

[0023] Figure 2 Connection schematic diagram of the high-precision reciprocating wire arranging device of the present utility model;

[0024] Figure 3 Structure schematic diagram of the high-precision reciprocating wire arranging device of the present utility model;

[0025] Figure 4 Structure schematic diagram of the reciprocating wire arranging structure;

[0026] Figure 5 Internal schematic diagram of the reciprocating wire arranging structure;

[0027] Figure 6 Cross-sectional view of the reciprocating wire arranging structure;

[0028] Figure 7 Motion state schematic diagram of the high-precision reciprocating wire arranging device of the present utility model, where a is the first motion state, b is the second motion state, c is the third motion state, d is the fourth motion state, and e is the fifth motion state.

[0029] Description of the Reference Numerals:

[0030] 1. Housing, 2. Wire reel, 3. Wire reel shaft, 4. Wire outlet, 51. Linkage structure, 511. First gear, 512. Second gear, 513. Worm wheel shaft mounting seat, 514. Worm wheel shaft, 515. Worm wheel, 516. Worm, 517. Worm shaft, 52. Reciprocating wire arranging structure, 521. First sub-board, 522. Second sub-board, 523. First rack, 524. Second rack, 525. Reversing guide groove, 526. Wire conduit, 5261. Wire hole, 527. Half-tooth gear. Detailed Implementation Modes

[0031] The present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. These embodiments are implemented on the premise of the technical solution of the present utility model, and detailed implementation manners and specific operation procedures are given. However, the protection scope of the present utility model is not limited to the following embodiments.

[0032] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0033] In the description of this embodiment, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0034] Terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0035] In the description of this embodiment, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this embodiment can be understood according to specific situations.

[0036] To make the purpose, technical solution and advantages of the present utility model clearer, the implementation manners of the present utility model will be further described in detail below with reference to the accompanying drawings.

[0037] Embodiment

[0038] To improve the measurement accuracy of the draw-wire sensor, meet the volume installation requirements, reduce the production and processing costs and processing difficulties, the present utility model provides a high-precision reciprocating wire arranging device for a draw-wire sensor, and this device realizes high-precision measurement by improving the consistency of wire winding of the steel wire rope.

[0039] Such as Figure 1As shown in the figure, a high-precision reciprocating wire arranging device for a pull rope sensor proposed by the present utility model is arranged in the internal space of the pull rope sensor housing 1 together with the wire winding wheel 2. An encoder driving the wire winding wheel shaft 3 is installed outside the housing 1. A plurality of turns of steel wire ropes are wound around the wire winding wheel 2. One end of the steel wire rope is fixed on the wire winding wheel 2, and the other end passes through the high-precision reciprocating wire arranging device and extends out from the wire outlet 4 on the housing 1 as a measuring free end. This reciprocating wire arranging device is used to achieve the consistent wire winding of the steel wire rope on the wire winding wheel and improve the measuring accuracy of the pull rope sensor.

[0040] As Figure 2 shown, the reciprocating wire arranging device, as the core component of the wire arranging of the pull rope sensor, includes an interlocking structure 51 and a reciprocating wire arranging structure 52 that are drivingly connected to each other.

[0041] As Figure 3 shown, the interlocking structure 51 includes a first gear 511, a second gear 512, a worm gear 515 and a worm 516. The first gear 511 is arranged on the outer edge of the wire winding wheel 2 and rotates synchronously with the wire winding wheel 2. The second gear 512 and the worm 516 are jointly installed on the worm shaft 516, and the second gear 512 meshes with the first gear 511. When the steel wire rope is pulled outwards to drive the wire winding wheel 2 to rotate, the first gear 511 drives the worm 516 to rotate synchronously through the meshing second gear 512. The worm 516 is arranged at the upper end of the worm shaft 516. The lower end of the worm shaft 516 passes through the second gear 512 and is rotatably fixed on the housing 1. The worm shaft 516 is arranged parallel to the wire winding wheel shaft 3. The worm gear 515 is arranged on the worm gear shaft 514 and is in transmission cooperation with the worm 516. One end of the worm gear shaft 514 is installed on the worm gear shaft mounting seat 513 through a bearing, and the worm gear shaft mounting seat 513 is fixed on the housing. The other end of the worm gear shaft 514 is drivingly connected to the reciprocating wire arranging structure, thereby realizing the transmission of the rotation of the wire winding wheel 2 to the reciprocating wire arranging structure;

[0042] As Figures 4-6 shown, the reciprocating wire arranging structure mainly includes a semi-tooth gear 517, a rack, a reversing guide plate and a wire conduit 526. The reversing guide plate includes a first sub-plate 521 and a second sub-plate 522 that are parallel and spaced apart. A reversing guide groove 525 is opened transversely in the middle of the first sub-plate 521 and the second sub-plate 522; There are two racks, including a first rack 523 and a second rack 524, which are respectively installed on the left and right sides of the middle interval between the first sub-plate 521 and the second sub-plate 522, and are fixed on the first sub-plate 521 and the second sub-plate 522 by screws to form an integral body. The semi-tooth gear 517 is in key transmission with the other end of the worm gear shaft 514 and is arranged in the space formed by the first sub-plate 521, the second sub-plate 522, the first rack 523 and the second rack 524;

[0043] The other end of the worm wheel shaft 514 passes through the reversing guide groove 525 of the first sub-plate 521, the half-tooth gear 517, and the reversing guide groove 525 of the second sub-plate in sequence for position limitation. When the worm wheel shaft 514 drives the half-tooth gear 517 to rotate, the half-tooth gear 517 meshes and drives with the racks on the left and right sides in sequence, thereby driving the overall movement. Since the half-tooth gear 517 rotates in one direction, while the racks on the left and right sides will move up and down reciprocally when driving with the half-tooth gear 517, and the other end of the worm wheel shaft 514 reciprocates relative to the reversing guide plate in the reversing guide groove 525;

[0044] In addition, in order to enable the half-tooth gear 517 to mesh and drive with the two racks in sequence, tooth missing treatments need to be carried out at the outer edge of the first rack 523 and the second rack 524 respectively, so as to prevent the half-tooth gear 517 from meshing with the first rack 523 and the second rack 524 simultaneously, which may cause the failure of the reciprocating wire arranging structure.

[0045] The wire conduit 526 is fixed on the outside of the second sub-plate 522, and it is provided with a through wire hole 5261. The steel wire rope on the wire reel 2 winds out of the wire reel 2, passes through the wire hole 5261, and then extends out through the wire outlet 4 on the housing 1. And a groove is opened at the position corresponding to the reversing guide groove 525 of the second sub-plate 522 to avoid the other end of the worm wheel shaft 514, thereby realizing the guiding and limiting of the worm wheel shaft 514 by the two reversing guide grooves 525 together, and increasing the movement stability.

[0046] In another example, the present utility model only sets the reversing guide groove 525 on the first sub-plate 521. The other end of the worm wheel shaft 514 is transmitted with the half-tooth gear 517 through a key after passing through the reversing guide groove 525 of the first sub-plate 521. When the reversing guide groove 525 of the first sub-plate 521 can ensure the stable reciprocating movement of the worm wheel shaft 514, there is no need to open a reversing guide groove 525 on the second sub-plate.

[0047] In order to facilitate wire winding, the outlet of the wire hole 5261 on the wire conduit 526 is directly opposite to the wire outlet 4 of the housing 1, and the inlet of the wire hole 5261 is preferably tangent to the wire reel 2 to ensure the shortest distance between the two.

[0048] In addition, during the use process, since the steel wire rope will be frequently pulled out and retracted, it is very easy to stick to dust under actual working conditions, increasing the friction force, resulting in the unsmooth movement of the steel wire rope, which affects the use and measurement accuracy. To solve this problem, the present utility model coats lubricating oil in the wire hole 5261 of the wire conduit 526 to achieve lubrication during the process of pulling out and retracting the steel wire rope, and a brush is arranged at the outlet of the wire hole 5261 to remove the dust and particles on the surface of the steel wire rope.

[0049] Further, when the wire reel 2 winds or pulls out the wire rope, it drives the wire conduit 526 to move reciprocally. In the present utility model, to wind the wire rope regularly and completely around the wire reel 2, the amplitude of the reciprocal movement of the wire conduit 526 is consistent with the winding width of the wire reel 2.

[0050] As Figure 7 shown, when the semi-toothed gear 517 rotates clockwise driven by the worm shaft 514, the two racks are sequentially engaged with the semi-toothed gear 517, thereby driving the entire reciprocal wire arranging structure to move reciprocally. The movement state is specifically described as follows:

[0051] In Fig. a, the toothed part of the semi-toothed gear 517 is engaged with the first rack 521 (located above in the figure), and the toothless part is not in contact with the second rack 522 (located below in the figure). At this time, the clockwise rotation of the semi-toothed rack 7 will drive the rack, the reversing guide plate and the wire conduit 526 to move to the right as a whole;

[0052] In Fig. b, when the toothed part of the semi-toothed gear 517 is about to disengage from the first rack 521 and is about to engage with the second rack 522, at this time, the rack, the reversing guide plate and the wire conduit 526 are at the maximum amplitude (the rightmost in the figure), and are about to change from moving to the right to moving to the left;

[0053] In Fig. c, the toothed part of the semi-toothed gear 517 starts to engage with the second rack 522, and the toothless part is not in contact with the first rack 521. At this time, the continuous rotation of the semi-toothed rack 7 will drive the rack, the reversing guide plate and the wire conduit 526 to move to the left as a whole;

[0054] In Fig. d, the toothed part of the semi-toothed gear 517 is engaged with the second rack 522, and the toothless part is not in contact with the first rack 521. At this time, the rotation of the semi-toothed rack 7 drives the rack, the reversing guide plate and the wire conduit 526 to move to the left as a whole;

[0055] In Fig. f, the toothed part of the semi-toothed gear 517 disengages from the second rack 522, and the toothless part starts to engage with the first rack 521. At this time, the rotation of the semi-toothed rack 7 will drive the rack, the reversing guide plate and the wire conduit 526 to move to the right as a whole.

[0056] As the semi-toothed gear 517 continues to rotate, the semi-toothed gear rotates in the same direction to drive the rack, the reversing guide plate and the wire conduit 526 to move reciprocally as a whole. At the same time, considering that the wire rope is required to fold back after covering one layer of the wire reel 2 and then wind the second layer until all the wire rope is wound around the wire reel 2. Therefore, the present utility model needs to make the reciprocal movement of the whole reciprocal wire arranging structure synchronized with the winding and folding-back frequency through reasonable design. Therefore, the present utility model designs the transmission ratio k1 of the first gear 511 and the second gear 512, and the transmission ratio k2 of the worm gear 515 and the worm 516, and their mutual relationship satisfies the following relationship:

[0057] Suppose the wire reel 2 needs to rotate n circles to cover one layer. When the wire reel 2 rotates one circle, the first gear 511 also rotates one circle, the second gear 512 rotates k1 circles, and the worm 516 also rotates k1 circles synchronously. Then the worm gear 515 rotates k1·k2 circles, and the half-tooth gear 517 also rotates k1·k2 circles. Also, since the half-tooth gear 517 rotating half a circle means the steel wire rope has covered one layer on the wire reel 2, the k1·k2 circles rotated by the half-tooth gear 517 is equivalent to 1 / 2n circles. So, we have:

[0058] 2n·k1·k2 = 1 (1)

[0059] The effective movement length l of the rack is the same as the effective winding height h of the wire reel 2. So, we have:

[0060] l = h = πr (2)

[0061] Where r is the radius of the half-tooth gear.

[0062] For example, when designing the structural dimensions of the rope-pulling sensor, the size and height of the housing can be determined first according to the design requirements. The radius of the wire reel 2 can be determined from the size of the housing, and the height of the wire reel 2 can be determined from the height of the housing to ensure that the wire reel 2 can be fixed in the cavity of the housing smoothly. At the same time, space for the reciprocating wire arranging device should be reserved in the cavity of the housing. Then, according to the wire diameter of the steel wire rope, the effective winding height h of the wire reel 2, and other relevant limitations (such as friction and other factors), the number of circles n required for the steel wire rope to cover one layer is determined. Next, appropriate first gear 511, second gear 512, worm gear 515, and worm 516 are selected so that their relationship satisfies equation (1). Finally, each component is assembled. In this way, for any range, wire diameter of the steel wire rope, winding quantity, and other requirements, the design can be carried out and the corresponding functions can be achieved.

[0063] In summary, the present utility model provides a high-precision reciprocating wire arranging device for a rope-pulling sensor. By setting the reciprocating wire arranging device, the consistency of winding and the repeatability of the rope-pulling sensor are improved, and the accuracy of the rope-pulling sensor can be improved through simple software algorithm compensation. Moreover, during production, the processing is simpler and the complexity is lower, effectively reducing the design, processing, and manufacturing costs. The volume of the rope-pulling sensor product is reduced, the usage scenarios are expanded, and the applicability of the rope-pulling sensor is improved. The steel wire rope is evenly wound through the reciprocating wire arranging device, which not only reduces the mutual friction between the steel wire ropes, improves the service life of the rope-pulling sensor, but also improves the stability of the overall structure, making the reliability and stability of the rope-pulling sensor higher and reducing the system error rate of using this sensor.

[0064] The preferred specific embodiments of the present utility model have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present utility model without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art in this technical field based on the concept of the present utility model through logical analysis, reasoning, or limited experiments on the basis of the prior art should fall within the protection scope determined by the claims.

Claims

1. A high-precision reciprocating wire arrangement device for a wire-drawing sensor, the device and a winding wheel (2) are arranged together in a housing (1), the housing (1) is provided with an encoder connected to the winding wheel shaft (3), characterized in that: Also includes: The linkage structure (51) comprises a first gear (511) arranged on the outer edge of the winding wheel (2) and rotating synchronously with the winding wheel (2), a second gear (512) meshing with the first gear (511), a worm (6) rotating together with the second gear (512), and a worm wheel (5) cooperating with the worm (6), wherein the worm wheel (5) is fixed on a worm wheel shaft (514); The reciprocating wire arrangement structure (52) comprises a reciprocating body, a half-tooth gear (527) arranged in the reciprocating body and connected to the worm shaft (514), and a wire tube (526) arranged on the reciprocating body. The steel wire wound on the winding wheel shaft (3) passes through the wire tube (526) and then extends out from the wire outlet (4) on the housing (1).

2. A high-precision reciprocating wire arrangement device for a draw wire sensor according to claim 1, characterized in that: The reciprocating body is composed of a rack and a reversing guide plate, the reversing guide plate is composed of a first sub-plate (521) and a second sub-plate (522) arranged parallel to each other, the rack is composed of a first rack (523) and a second rack (524) arranged parallel to each other, and is respectively fixed to the first sub-plate (521) and the second sub-plate (522) by screws.

3. A high-precision reciprocating wire arrangement device for a draw wire sensor according to claim 2, characterized in that: The first sub-plate (521) and the second sub-plate (522) have the same structure, and a reversing guide groove (525) is respectively provided therein, and the worm gear shaft (514) passes through the reversing guide groove (525) of the first sub-plate (521), the half-tooth gear (527), and the reversing guide groove (525) of the second sub-plate (522) in sequence.

4. A high-precision reciprocating wire arrangement device for a draw wire sensor according to claim 3, characterized in that: The wire tube (526) is arranged on the second sub-plate (522), and a groove for avoiding the worm gear shaft (514) is opened at the position of the reversing guide groove (525) of the second sub-plate (522).

5. The high-precision reciprocating wire arrangement device of a wire-drawing sensor according to claim 2, characterized in that: The first sub-plate (521) is provided with a reversing guide groove (525), and the worm gear shaft (514) passes through the reversing guide groove (525) and then extends into the reciprocating body to be connected to the half-tooth gear (527) via a key.

6. A high-precision reciprocating wire arrangement device for a draw wire sensor according to claim 3 or 5, characterized in that: The wire tube (526) is arranged on the second sub-plate (522), one end of the wire rope is fixed on the winding wheel (2), and the other end is wound out of the winding wheel (2) and passes through the wire hole (5261) of the wire tube (526) and then extends out through the outlet (4) on the shell (1).

7. A high-precision reciprocating wire arrangement device for a draw wire sensor according to claim 6, characterized in that: The outlet of the wire hole (5261) is directly opposite to the wire outlet on the housing, and the inlet of the wire hole (5261) is arranged tangentially to the winding wheel (2).

8. The high-precision reciprocating wire arrangement device of a draw wire sensor according to claim 7, characterized in that: Lubricating oil is coated inside the wire hole (5261), and a brush is provided at the outlet of the wire hole (5261).

9. The high-precision reciprocating wire arrangement device of a wire-drawing sensor according to claim 2, characterized in that: The first rack (523) and the second rack (524) are provided with missing teeth at the edges along the rotation direction of the half-toothed gear (527).

10. The high-precision reciprocating wire arrangement device of a draw wire sensor according to claim 1, characterized in that: The linkage structure (51) further comprises a worm shaft (516) and a worm wheel shaft mounting seat (513) arranged on the housing (1); the worm (6) is arranged at the top end of the worm shaft (516); the bottom end of the worm shaft (516) passes through the second gear (512) and is rotatably connected to the housing (1); one end of the worm wheel shaft (514) is rotatably mounted on the worm wheel shaft mounting seat (513) via a bearing.

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