A gravity-driven flexible reciprocating dynamic length measuring mechanism

Abstract

The present invention relates to the technical field of measuring instruments, and particularly relates to a gravity-driven flexible reciprocating dynamic length measuring mechanism. The power device is a structure in which a motor drives a rotating roller, and the rotating roller is connected to a pulley box assembly through a steel wire rope transmission; the pulley box assembly is arranged below the power device, and the pulley box assembly is connected to a moving part through a steel wire rope transmission; the moving part is slidably arranged on the installation chassis, one end of the moving part is connected to the pulley box assembly through a steel wire rope, and the other end is connected to a counterweight through a steel wire rope. The beneficial effects of the present invention are as follows: The reciprocating moving part of the present invention can make the length measuring wheel always fit the curved profile, and the pulley box assembly can ensure the tension state of the steel wire rope during length measurement, prevent the steel wire rope from disengaging from the moving and fixed pulleys, and ensure the movement continuity of the moving part and the measurement accuracy of the length measuring wheel.

Description

Technical Field

[0001] The present invention relates to the technical field of measuring instruments, and particularly relates to a gravity-driven flexible reciprocating dynamic length measuring mechanism. Background Art

[0002] For the direct extrusion molding of curved profiles, the profiles produced by extrusion always exit perpendicular to the discharge port, resulting in the left-right yaw of the produced and uncut profiles. Conventional length measuring wheels cannot effectively fit with the profiles to achieve the purpose of length measurement.

[0003] Therefore, this application designs a gravity-driven flexible reciprocating dynamic length measuring mechanism to solve the problem that the length measuring wheel realizes reciprocating motion when the moving parts are separated from the power device and arranged non-coaxially, and the encoder identifies the discharge length of the curved profiles produced by extrusion. Summary of the Invention

[0004] The present invention provides a gravity-driven flexible reciprocating dynamic length measuring mechanism to make up for the deficiencies in the prior art.

[0005] The present invention is realized by the following technical solutions:

[0006] A gravity-driven flexible reciprocating dynamic length measuring mechanism, including a power device, a pulley box assembly, a steel wire rope, and a moving part, characterized in that:

[0007] The power device is a structure of a motor driving a rotating roller, and the rotating roller is connected to the pulley box assembly through a steel wire rope;

[0008] The pulley box assembly is arranged below the power device, and the pulley box assembly is connected to the moving part through a steel wire rope;

[0009] The moving part is slidably arranged on the mounting base frame, one end of the moving part is connected to the pulley box assembly through a steel wire rope, and the other end is connected to a counterweight through a steel wire rope.

[0010] Further, to better implement the present invention, the pulley box assembly includes a gantry-type bracket, a second fixed pulley is connected to the top of the gantry-type bracket, vertical guide rails are fixed on both sides of the bracket, a hard limit block is provided at the bottom end of the vertical guide rails, induction switches are arranged at intervals on the vertical guide rails, and a first moving pulley with a counterweight and a second moving pulley are respectively slidably connected to the vertical guide rails on both sides; the steel wire rope connected to the power device is the first steel wire rope, and the first steel wire rope successively bypasses the second moving pulley, the second fixed pulley, the first moving pulley from the driving roller and then connects the left end of the moving part.

[0011] Further, to better implement the present invention, the moving part includes an L-shaped moving push rod. A slider is connected to the bottom end of the moving push rod. The slider is slidably connected to a horizontal guide rail provided on the mounting base frame. The other end of the moving push rod is provided with a length measuring wheel. The length measuring wheel is drivingly connected to a belt mechanism. One pulley of the belt mechanism is synchronously drivingly connected to the length measuring wheel, and the other pulley is synchronously drivingly connected to an encoder.

[0012] Further, to better implement the present invention, a plurality of first fixed pulleys are installed on the mounting base frame. A first steel wire rope is threaded through the first fixed pulleys. The end of the first steel wire rope is connected to the left side of the bottom end of the moving push rod; a second steel wire rope is also connected to the right side of the bottom end of the moving push rod, and the end of the second steel wire rope is connected to a counterweight block.

[0013] Further, to better implement the present invention, the weights of the first movable pulley and the second movable pulley are less than the weight of the counterweight block.

[0014] The beneficial effects of the present invention are as follows:

[0015] The reciprocating moving part of the present invention can keep the length measuring wheel always in contact with the curved profile. The pulley box assembly can ensure the tension state of the steel wire rope during length measurement, prevent the steel wire rope from detaching from the movable and fixed pulleys, and ensure the movement continuity of the moving part and the measurement accuracy of the length measuring wheel. Description of the Drawings

[0016] Figure 1 is a three-dimensional structural schematic diagram of the gravity-driven flexible reciprocating dynamic length measuring mechanism of the present invention;

[0017] Figure 2 is a front view structural schematic diagram of the gravity-driven flexible reciprocating dynamic length measuring mechanism of the present invention;

[0018] Figure 3 is a three-dimensional structural schematic diagram of the moving part of the gravity-driven flexible reciprocating dynamic length measuring mechanism of the present invention;

[0019] Figure 4 is a structural schematic diagram of the pulley box assembly of the gravity-driven flexible reciprocating dynamic length measuring mechanism of the present invention.

[0020] In the figure,

[0021] 1. Power device,

[0022] 2. Pulley box assembly, 201. Second fixed pulley, 202. First movable pulley, 203. Second movable pulley, 204. Vertical guide rail, 205. Inductive switch, 206. Hard limit block,

[0023] 3. First steel wire rope,

[0024] 4. Moving parts, 401. Length measuring wheel, 402. Pulley, 403. Belt, 404. Encoder, 405. Moving push rod,

[0025] 5. Horizontal guide rail, 6. Installation base frame, 7. First fixed pulley, 8. Travel switch, 9. Second steel wire rope, 10. Counterweight, 11. Example of bent profile produced by extrusion. Specific embodiments

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Usually, the components of the embodiments of the present invention described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents the selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0028] It should be noted that: 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.

[0029] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "middle", "upper", "lower", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the present invention is usually placed when in use. It is only for the convenience of describing the present invention 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 cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0030] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0031] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "set", "connected", and "coupled" 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 components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0032] The following will describe in detail some embodiments of the present invention with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0033] Figures 1-4 This is a specific embodiment of the present invention, which is a gravity-driven flexible reciprocating dynamic length measuring mechanism. This embodiment includes a power device 1, a steel wire rope, a pulley box assembly 2, a mounting chassis 6, a fixed pulley, a guide rail, a moving part 4, a counterweight 10, a travel switch 8, etc. The steel wire rope is used as a driving medium to connect the power device 1, the moving part 4, and the counterweight 10 in series. An array of fixed pulleys changes the direction of power transmission, and through a set of power devices, the reciprocating motion of the moving part 4 is realized under the condition of non-coaxiality.

[0034] As Figure 1 shown, the power device 1 is installed on the pulley box assembly 2, and the pulley box assembly 2 and the mounting chassis 6 are respectively installed on the equipment frame. One end of the first steel wire rope 3 is fixed on the moving part 4, and the other end passes through the pulley in the pulley box assembly 2 and is fixed on the rotating roller of the power device 1. One end of the second steel wire rope 9 is also fixed on the moving part 4, and the other end suspends an array of counterweights 10 through a fixed pulley.

[0035] As Figure 3 shown, the moving part 4 includes a moving push rod 405, a horizontal guide rail 5, a belt pulley 402, a belt 403, a length measuring wheel 401, an encoder 404, etc. The friction force generated by the extrusion of the length measuring wheel 401 in its radial direction with the bent pipe 11 drives the length measuring wheel 401 to rotate. Through belt transmission, the encoder 404 is driven to rotate, so the moving distance of the material can be measured.

[0036] As Figure 4 shown, the pulley box assembly 2 includes a movable pulley, a fixed pulley, a vertical guide rail, an induction switch, a hard limit block, etc. A counterweight is provided on the movable pulley and is slidably connected to the vertical guide rail. The limit block prevents the movable pulley slider from disengaging from the guide rail.

[0037] In this embodiment, the power device 1 rotates the roller to tighten the first steel wire rope 3, and the moving part 4 is pulled to the end of the horizontal guide rail 5, triggering the travel switch 8. The rotating roller stops rotating, and the length measuring wheel 401 of the moving part 4 returns to the origin initial position. During the process of tightening the first steel wire rope 3, the movable pulley with a counterweight block installed on the slider in the pulley box is pulled to the top of the vertical guide rail 204 in the pulley box.

[0038] When the bent pipe 11 formed by extrusion reaches the position of the length measuring wheel 401, the power device 1 rotates the roller in the reverse direction to release the first steel wire rope 3. Under the action of the self-gravity of the counterweight block 10, the moving part 4 driven by the second steel wire rope 9 moves towards the counterweight block 10 until it contacts the pipe. The pipe drives the length measuring wheel 401 to rotate through the frictional force with the length measuring wheel 401. The rotating roller of the power device 1 continues to release the first steel wire rope 3, and the movable pulley with a counterweight block in the pulley box also starts to move downward until the induction switch 205 in the pulley box is triggered. Through signal feedback, the rotating roller of the power device 1 stops rotating. At this time, there is enough margin for the pre-released length of the steel wire rope in the pulley box and the space for the downward movement of the slider. The weight of the counterweight block of the movable pulley in the pulley box is less than the weight of the counterweight hung on the other end of the steel wire rope of the moving part.

[0039] When there is a bent part in the extruded profile, the contact position between the length measuring wheel 401 and the profile undergoes dynamic displacement, and the length measuring wheel 401 moves left and right. When the pipe bends towards the pulley box side, the length measuring wheel 401

[0040] retracts, the slider in the pulley box moves downward, and the first steel wire rope 3 is tightened; when the pipe bends towards the counterweight block 10 side, the counterweight block 10 pulls the length measuring wheel 401 to continue moving forward, and at the same time, the counterweight movable pulley in the pulley box is also lifted. The pre-released length of the steel wire rope in the pulley box and the space for the downward movement of the slider can just offset the displacement yaw amount of the length measuring wheel 401 caused by the bending of the profile, and at the same time, it also ensures the tightened state of the first steel wire rope 3 during this period, preventing the steel wire rope from detaching from the movable and fixed pulleys, and ensuring the movement continuity of the moving part and the measurement accuracy of the length measuring wheel.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Any other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims

1. A gravity-driven flexible reciprocating dynamic length measuring mechanism, comprising a power device (1), a pulley box assembly (2), a steel wire rope and a moving part (4), characterized in that: The power device (1) is a structure in which a motor drives a rotating roller, and the rotating roller is connected to the pulley box assembly (2) via a steel wire rope transmission; The pulley box assembly (2) is arranged below the power device (1), and the pulley box assembly (2) is connected to the moving component (4) via a steel wire rope transmission; The pulley box assembly (2) comprises a gantry-type bracket, the top of the gantry-type bracket is connected to a second fixed pulley (201), vertical guide rails (204) are fixed on both sides of the bracket, a hard limit block (206) is provided at the bottom end of the vertical guide rail (204), induction switches (205) are provided on the vertical guide rail (204) at intervals, and a first movable pulley (202) and a second movable pulley (203) with a counterweight are respectively slidably connected to the vertical guide rails (204) on both sides; The steel wire rope connected to the power device (1) is a first steel wire rope (3), which starts from the transmission roller, passes through the second movable pulley (203), the second fixed pulley (201), and the first movable pulley (202) in sequence, and then connects to the left end of the moving component (4); The moving component (4) is slidably arranged on the mounting base (6), one end of the moving component (4) is connected to the pulley box assembly (2) via a steel wire rope, and the other end is connected to a counterweight (10) via a steel wire rope; The weight of the counterweights of the first movable pulley (202) and the second movable pulley (203) is less than the weight of the counterweight block (10); The moving component (4) comprises an L-shaped moving push rod (405), the bottom end of the moving push rod (405) is connected to a slider, the slider is slidably connected to a horizontal guide rail (5) arranged on a mounting base (6), the other end of the moving push rod (405) is installed with a length measuring wheel (401), the length measuring wheel (401) is transmission-connected to a belt mechanism, one pulley (402) of the belt mechanism is synchronously transmission-connected to the length measuring wheel (401), and the other pulley is synchronously transmission-connected to an encoder (404).

2. The gravity-driven flexible reciprocating dynamic length measuring mechanism according to claim 1, characterized in that: A plurality of first fixed pulleys (7) are installed on the mounting base (6), a first steel wire rope (3) is passed through the first fixed pulley (7), and the end of the first steel wire rope (3) is connected to the left side of the bottom end of the motion push rod (405); The right side of the bottom end of the motion push rod (405) is also connected to a second steel wire rope (9), and the end of the second steel wire rope (9) is connected to a counterweight block (10).

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