Steel wire transmission self-tensioning mechanism and three-coordinate measuring machine

Abstract

The invention provides a steel wire transmission self-tensioning mechanism and a three-coordinate measuring machine, the steel wire transmission self-tensioning mechanism is used for tensioning a steel wire, and the steel wire transmission self-tensioning mechanism comprises a mounting base, a supporting assembly and a tensioning assembly; the supporting assembly is connected to the mounting base, abuts against the steel wire and is used for supporting the steel wire; the tensioning assembly is connected to the mounting base and abuts against the steel wire, and the tensioning assembly and the supporting assembly are oppositely arranged so as to tension the steel wire. The tensioning assembly is arranged to be in contact with one side of the steel wire, and the supporting assembly is arranged to be in contact with the other side of the steel wire. When the steel wire transmission self-tensioning mechanism works, the tensioning assembly provides pushing force to enable the steel wire to be supported by the supporting assembly, when the steel wire is loosened, the tensioning assembly can automatically tension the steel wire, the tensioning force of the steel wire is kept unchanged, and therefore the movement positioning precision and the measuring precision of the three-coordinate measuring machine are maintained.

Description

Technical Field

[0001] This invention relates to the field of measuring machine technology, and more specifically, to a wire-driven self-tensioning mechanism and a coordinate measuring machine. Background Technology

[0002] A coordinate measuring machine (CMM) is a high-efficiency precision measuring instrument based on coordinate measurement technology. It mainly consists of a main unit, a probe, and an electrical system. The main unit comprises three mutually perpendicular linear motion axes, and the transmission mechanisms used include lead screw drives, rack and pinion drives, toothed belt drives, and wire drives. For CMMs using wire drive mechanisms, the wire drive offers good rigidity and high positioning accuracy. However, after prolonged use, the wire rope in the transmission mechanism is prone to loosening, leading to a decrease in transmission tension, which in turn reduces the positioning accuracy of the measuring machine and consequently lowers its measurement precision. Summary of the Invention

[0003] (a) Technical problems to be solved The technical problem to be solved by this invention is the decrease in measurement accuracy of coordinate measuring machines using wire rope drive due to the loosening of the wire rope.

[0004] (II) Technical Solution To achieve the above objectives, the technical solution adopted by the present invention is as follows: This invention provides a wire-driven self-tensioning mechanism for tensioning a steel wire, comprising a mounting base, a support assembly, and a tensioning assembly; the support assembly is connected to the mounting base, abuts against the steel wire, and is used to support the steel wire; the tensioning assembly is connected to the mounting base, abuts against the steel wire, and is disposed opposite to the support assembly to tension the steel wire.

[0005] Preferably, the support assembly includes a first connecting plate, a first bracket, and a first wire wheel mechanism. The first connecting plate is connected to the mounting base, the first bracket is connected to the first connecting plate, and the first wire wheel mechanism is rotatably connected to the first bracket. The first wire wheel mechanism has a first wire groove for accommodating the wire.

[0006] Preferably, it also includes fasteners. The mounting base is provided with a plurality of connection holes, the first connecting plate is provided with a first connection groove, and the fasteners pass through the connection holes and the first connection groove to securely connect the first connecting plate and the mounting base.

[0007] Preferably, the first wire wheel mechanism includes a first wire wheel shaft, a first bearing, and a first bearing cover; the first bracket is provided with a mounting groove, the first wire wheel shaft is disposed in the first mounting groove, the two ends of the first wire wheel shaft are respectively connected to the inner ring of the first bearing, the first bracket is connected to the outer ring of the first bearing, and the first bearing cover is fastened to the first bearing and the first bracket.

[0008] Preferably, the number of the first wire grooves is equal to the number of steel wires, and the width of the first wire groove is equal to the diameter of the steel wire.

[0009] Preferably, the tensioning assembly includes a second connecting plate, a tensioning cylinder, a second bracket, and a second wire wheel mechanism. The second connecting plate is connected to the mounting base, the second bracket is connected to the second connecting plate, the output end of the tensioning cylinder is connected to the second bracket, and the second wire wheel mechanism is rotatably connected to the second bracket. The second wire wheel mechanism has a second wire groove for accommodating the wire.

[0010] Preferably, it also includes fasteners. The mounting base is provided with a plurality of connection holes, and the second connecting plate is provided with a second connection groove. The fasteners pass through the connection holes and the second connection groove to securely connect the second connecting plate and the mounting base.

[0011] Preferably, the second wire wheel mechanism includes a second wire wheel shaft, a second bearing, and a second bearing cover; the second bracket is provided with a second mounting groove, the second wire wheel shaft is disposed in the second mounting groove, the two ends of the second wire wheel shaft are respectively connected to the inner ring of the second bearing, the second bracket is connected to the outer ring of the second bearing, and the second bearing cover is fastened to the second bearing and the second bracket.

[0012] Preferably, the number of the second wire grooves is equal to the number of the steel wires, and the width of the second wire groove is equal to the diameter of the steel wire.

[0013] The present invention also provides a coordinate measuring machine, including a steel wire, a steel wire transmission mechanism, and a steel wire transmission self-tensioning mechanism as described in any of the above technical solutions. The steel wire is connected to the steel wire transmission mechanism, the support component abuts against the lower end of the steel wire, and the tensioning component abuts against the upper end of the steel wire.

[0014] (III) Beneficial Effects The above-described technical solution of the present invention has at least the following advantages: In this invention, the tensioning component is configured to contact one side of the steel wire, and the support component is configured to contact the other side of the steel wire. When the steel wire is driven by the tensioning mechanism, the tensioning component provides thrust so that the steel wire is supported by the support component. When the steel wire becomes loose, the tensioning component can automatically tension the steel wire to keep the tension constant, thereby maintaining the motion positioning accuracy and measurement accuracy of the coordinate measuring machine. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the steel wire drive self-tensioning mechanism provided in an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the structure of the support component provided in an embodiment of the present invention.

[0018] Figure 3 This is an exploded view of the first wire wheel mechanism provided in an embodiment of the present invention.

[0019] Figure 4 This is a schematic diagram of the tensioning component provided in an embodiment of the present invention.

[0020] Figure 5 This is an exploded view of the second wire wheel mechanism provided in an embodiment of the present invention.

[0021] Figure 6 This is a schematic diagram of the structure of the coordinate measuring machine provided in an embodiment of the present invention.

[0022] Figure 7 yes Figure 6 A magnified view of a portion of the central area.

[0023] The labels for the attached figures are as follows: 10. Steel wire; 1. Mounting base; 2. Support assembly; 3. Tensioning assembly; 11. Connecting hole; 21. First connecting plate; 22. First bracket; 23. First steel wire wheel mechanism; 31. Second connecting plate; 32. Tensioning cylinder; 33. Second bracket; 34. Second steel wire wheel mechanism; 211. First connecting groove; 231. First steel wire wheel shaft; 232. First bearing; 233. First bearing cover; 311. Second connecting groove; 341. Second steel wire wheel shaft; 342. Second bearing; 343. Second bearing cover. Detailed Implementation

[0024] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0025] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be located directly on or indirectly on the other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to the other component.

[0026] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate that the device or element must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or the number of technical features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. The specific implementation of this invention will be described in more detail below with reference to specific embodiments: like Figure 1 As shown, this embodiment of the invention provides a wire-driven self-tensioning mechanism 100 for tensioning a wire 10, including a mounting base 1, a support component 2, and a tensioning component 3; the support component 2 is connected to the mounting base 1, abuts against the wire 10, and is used to support the wire 10; the tensioning component 3 is connected to the mounting base 1, abuts against the wire 10, and is arranged opposite to the support component 2 to tension the wire 10.

[0028] like Figure 2 As shown, in one embodiment, the support assembly 2 includes a first connecting plate 21, a first bracket 22, and a first wire wheel mechanism 23. The first connecting plate 21 is connected to the mounting base 1, the first bracket 22 is connected to the first connecting plate 21, and the first wire wheel mechanism 23 is rotatably connected to the first bracket 22. The first wire wheel mechanism 23 has a first wire groove 231 for accommodating the wire 10.

[0029] In one embodiment, the wire drive self-tensioning mechanism 100 further includes fasteners. The mounting base 1 has multiple connecting holes 11, and the first connecting plate 21 has a first connecting groove 211. The fasteners pass through the connecting holes 11 and the first connecting groove 211, fastening the first connecting plate 21 to the mounting base 1. By adjusting the positions of the connecting holes 11 and the first connecting groove 211, the mounting height of the first connecting plate 21 can be adjusted, thereby enabling manual adjustment of the mounting height of the first wire wheel mechanism 23.

[0030] like Figure 3 As shown, in one embodiment, the first wire wheel mechanism 23 includes a first wire wheel shaft 231, a first bearing 232, and a first bearing cover 233. The first bracket 22 has a mounting groove 221, in which the first wire wheel shaft 231 is disposed. Both ends of the first wire wheel shaft 231 are connected to the inner ring of the first bearing 232, and the first bracket 22 is connected to the outer ring of the first bearing 232. The first bearing cover 233 securely connects the first bearing 232 and the first bracket 22. Specifically, the first wire wheel shaft 231 can rotate following the transmission of the wire to achieve wire conveying. Furthermore, this embodiment can be extended to toothed belt drive devices by replacing the first wire wheel shaft 231 with toothed pulleys of different specifications.

[0031] In one embodiment, the number of first wire grooves 231 is equal to the number of steel wires 10, and the width of the first wire groove 231 is equal to the diameter of the steel wire 10. Furthermore, the size and number of the first wire grooves 231 on the first wire wheel mechanism 23 can be changed to meet the needs of different specifications of measuring machine wire transmission mechanisms.

[0032] like Figure 4 As shown, in one embodiment, the tensioning assembly 3 includes a second connecting plate 31, a tensioning cylinder 32, a second bracket 33, and a second wire wheel mechanism 34. The second connecting plate 31 is connected to the mounting base 1, the second bracket 33 is connected to the second connecting plate 31, the output end of the tensioning cylinder 32 is connected to the second bracket 33, and the second wire wheel mechanism 34 is rotatably connected to the second bracket 33. The second wire wheel mechanism 34 has a second wire groove 341 for accommodating the wire 10.

[0033] In one embodiment, the wire drive self-tensioning mechanism 100 further includes fasteners. The mounting base 1 has multiple connecting holes 11, and the second connecting plate 31 has a second connecting groove 311. The fasteners pass through the connecting holes 11 and the second connecting groove 311, fastening the second connecting plate 31 to the mounting base 1. By adjusting the position of the second connecting groove 311 on the second connecting plate 31, the mounting height of the second connecting plate 31 can be adjusted, thereby enabling manual adjustment of the mounting height of the second wire wheel mechanism 34.

[0034] like Figure 5 As shown, in one embodiment, the second wire wheel mechanism 34 includes a second wire wheel shaft 341, a second bearing 342, and a second bearing cover 343. The second bracket 33 has a second mounting groove 331, in which the second wire wheel shaft 341 is disposed. Both ends of the second wire wheel shaft 341 are connected to the inner ring of the second bearing 342, and the second bracket 33 is connected to the outer ring of the second bearing 342. The second bearing cover 343 securely connects the second bearing 342 and the second bracket 33. Specifically, the second wire wheel shaft 341 can rotate following the transmission of the wire to achieve wire conveying. Furthermore, this embodiment can be extended to toothed belt drive devices by replacing the second wire wheel shaft 341 with toothed pulleys of different specifications.

[0035] In one embodiment, the number of second wire grooves 341 is equal to the number of steel wires 10, and the width of the second wire grooves 341 is equal to the diameter of the steel wires 10. Furthermore, the size and number of the second wire grooves 341 on the second wire wheel shaft 341 can be changed to meet the needs of different specifications of measuring machine wire transmission mechanisms.

[0036] The present invention also provides a coordinate measuring machine 200, including a steel wire 10, a steel wire transmission mechanism, and a steel wire transmission self-tensioning mechanism 100 according to any of the above-described technical solutions. The steel wire 10 is connected to the steel wire transmission mechanism, the support component 2 abuts against the lower end of the steel wire 10, and the tensioning component 3 abuts against the upper end of the steel wire 10. The steel wire transmission self-tensioning mechanism 100 is disposed at the end of the transmission device of the coordinate measuring machine 200. (See reference...) Figure 6 and Figure 7 In a measuring machine's wire-driven tensioning mechanism 100, a tensioning component 3 is positioned to contact the upper end of the lower transmission wire, while a support component 3 is located to the left of the tensioning component 3 and contacts the lower end of the lower wire 10. When the wire-driven tensioning mechanism 100 is operating, the tensioning cylinder 32 in the tensioning component 3 applies air to the second wire wheel mechanism 34, creating a downward pulling force. When the wire transmission mechanism of the coordinate measuring machine 200 becomes loose due to the wire 10, the tensioning component 3 automatically tensions the wire, maintaining a constant tension force and thus preserving the motion positioning and measurement accuracy of the coordinate measuring machine 200.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wire-driven self-tensioning mechanism, characterized in that, Used for tensioning steel wire, including: Mounting base; A support assembly is connected to the mounting base, the support assembly abuts against the steel wire, and is used to support the steel wire; The tensioning assembly is connected to the mounting base and abuts against the steel wire. The tensioning assembly is disposed opposite to the support assembly to tension the steel wire.

2. The wire-driven self-tensioning mechanism as described in claim 1, characterized in that, The support assembly includes a first connecting plate, a first bracket, and a first wire wheel mechanism. The first connecting plate is connected to the mounting base, the first bracket is connected to the first connecting plate, and the first wire wheel mechanism is rotatably connected to the first bracket. The first wire wheel mechanism has a first wire groove for accommodating the wire.

3. The wire-driven self-tensioning mechanism as described in claim 2, characterized in that, It also includes fasteners. The mounting base is provided with multiple connection holes, and the first connecting plate is provided with a first connection groove. The fasteners pass through the connection holes and the first connection groove to securely connect the first connecting plate and the mounting base.

4. The wire-driven self-tensioning mechanism as described in claim 2, characterized in that, The first wire wheel mechanism includes a first wire wheel shaft, a first bearing, and a first bearing cover; the first bracket is provided with a mounting groove, the first wire wheel shaft is disposed in the first mounting groove, the two ends of the first wire wheel shaft are respectively connected to the inner ring of the first bearing, the first bracket is connected to the outer ring of the first bearing, and the first bearing cover is fastened to the first bearing and the first bracket.

5. The wire-driven self-tensioning mechanism as described in claim 2, characterized in that, The number of the first wire grooves is equal to the number of the steel wires, and the width of the first wire groove is equal to the diameter of the steel wire.

6. The wire-driven self-tensioning mechanism as described in claim 1, characterized in that, The tensioning assembly includes a second connecting plate, a tensioning cylinder, a second bracket, and a second wire wheel mechanism. The second connecting plate is connected to the mounting base, the second bracket is connected to the second connecting plate, the output end of the tensioning cylinder is connected to the second bracket, and the second wire wheel mechanism is rotatably connected to the second bracket. The second wire wheel mechanism has a second wire groove for accommodating the wire.

7. The wire-driven self-tensioning mechanism as described in claim 6, characterized in that, It also includes fasteners. The mounting base has multiple connection holes, and the second connecting plate has a second connection groove. The fasteners pass through the connection holes and the second connection groove to securely connect the second connecting plate to the mounting base.

8. The wire-driven self-tensioning mechanism as described in claim 6, characterized in that, The second wire wheel mechanism includes a second wire wheel shaft, a second bearing, and a second bearing cover; the second bracket is provided with a second mounting groove, the second wire wheel shaft is disposed in the second mounting groove, the two ends of the second wire wheel shaft are respectively connected to the inner ring of the second bearing, the second bracket is connected to the outer ring of the second bearing, and the second bearing cover is fastened to the second bearing and the second bracket.

9. The wire-driven self-tensioning mechanism as described in claim 6, characterized in that, The number of the second wire grooves is equal to the number of the steel wires, and the width of the second wire groove is equal to the diameter of the steel wire.

10. A coordinate measuring machine, characterized in that, It includes a steel wire, a steel wire drive mechanism, and a steel wire drive self-tensioning mechanism as described in any one of claims 1-9, wherein the steel wire is connected to the steel wire drive mechanism, the support assembly abuts against the lower end of the steel wire, and the tensioning assembly abuts against the upper end of the steel wire.

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