A length measuring device

Abstract

The utility model relates to the field of measuring device, concretely is a length measuring device, including base, the upper guide wire roller of driving wheel and up and down adjustment is established on the base through support, the front end of base is slidably provided with measuring device, the adjusting assembly for transmission adjustment measuring device horizontal displacement is installed to the bottom in the base, the measuring wheel is established on measuring device through the pivot, and the height of measuring wheel is lower than the setting height of driving wheel. The utility model adopts the high and low setting of driving wheel and measuring wheel, utilizes the horizontal displacement of measuring wheel to drive the appropriate position after adjusting screw rod rotation, makes it with driving wheel and forms the high and low staggered and keeps the cable tension state, drives the cable movement through driving wheel, thereby drives the rotation of measuring wheel and mechanical type counter, and mechanical type counter reads the number of turns of measuring wheel rotation, obtains the cable length, improves the measurement accuracy, prevents the cable from not contacting with measuring wheel in the movement process and causes the problem of unable to drive the rotation of measuring wheel to occur.

Description

Technical Field

[0001] This utility model relates to the field of measuring devices, specifically a length measuring device. Background Technology

[0002] Patent publication number CN220649430U discloses a cable length measuring device. The distance the cable moves between the lower roller and the upper roller is transmitted through a first gear and a second gear. The kinetic energy is transmitted to the second scale and the first scale, and the length of the cable is clearly known by the numbers in the scale grooves.

[0003] Because the upper roller makes the surface of the cable contact the surfaces of the upper and lower rollers under the force of the tension spring, but the upper roller has a space for elastic up and down movement due to the elasticity of the tension spring, the cable may not be able to drive the lower roller to rotate when passing through the upper and lower rollers, thus affecting the measurement accuracy and causing measurement problems.

[0004] Therefore, we provide a length measuring device. Utility Model Content

[0005] In view of the shortcomings of the prior art, the present invention provides a length measuring device that solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the specific technical solution adopted by this utility model is as follows:

[0007] A length measuring device includes a base, on which a drive wheel and an adjustable upper guide roller are mounted via a bracket. A measuring device is slidably mounted on the front end of the base. An adjustment component for transmitting and adjusting the horizontal displacement of the measuring device is installed at the bottom of the base. A measuring wheel is mounted on the measuring device via a rotating shaft. The height of the measuring wheel is lower than the height of the drive wheel. A limiting structure to prevent the measuring wheel from reversing is also provided on the right side of the measuring device.

[0008] Preferably, the adjustment assembly includes an adjustment screw installed in the bottom mounting groove of the base, the bottom of the metering device is slidably mounted on the adjustment screw via a screw slider, the lower ends of both sides of the metering device are slidably mounted in guide grooves on both sides of the base via guide sliders, and an adjustment handwheel is provided on the outer end of the adjustment screw.

[0009] Preferably, one end of the measuring wheel's shaft extends through the measuring device and is fitted with a fixed gear. Below the fixed gear, a counting gear is meshed and connected to the counting gear shaft, which is connected to a mechanical counter. The mechanical counter is mounted on the outer wall of the measuring device via a mounting plate.

[0010] Preferably, the limiting structure includes a limiting baffle, one end of which is mounted on the outer wall of the metering device via a pin, and the other end of which abuts against the lower end of the fixed gear. A limiting rod is provided above the limiting baffle and fits against the limiting baffle. A support rod is provided below the limiting baffle and has a spring that elastically supports the limiting baffle. The support rod and the limiting rod are fixed to the outer wall of the metering device.

[0011] Preferably, the bracket is equipped with a motor for driving the drive wheel to rotate, and an adjusting screw is threadedly connected to the bracket. The bottom end of the adjusting screw is connected to an adjusting shaft seat through a bearing. An upper guide roller is installed on the adjusting shaft seat, and the two sides of the adjusting shaft seat are guided and slid on the slide grooves on the inner side wall of the bracket by guide blocks.

[0012] Preferably, a wire roller is installed at the front end of the base, and a cable is provided on the wire roller. The cable passes around the metering wheel and runs between the drive wheel and the upper wire roller.

[0013] This utility model has the following features and beneficial effects:

[0014] This invention employs a height-displacement design between the drive wheel and the measuring wheel. An adjusting screw rotates, causing the measuring wheel to shift horizontally to a suitable position, creating a height misalignment with the drive wheel to maintain cable tension. This ensures the measuring wheel remains in constant contact with the cable. The motor drives the drive wheel, which in turn moves the cable, causing the measuring wheel to rotate. The measuring wheel then drives a mechanical counter, which reads the number of rotations of the measuring wheel. Based on the circumference of the measuring wheel, the cable length is determined. This improves measuring accuracy and prevents the measuring wheel from failing to rotate due to lack of contact between the cable and the measuring wheel during movement. Attached Figure Description

[0015] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a front view structural diagram of the present utility model;

[0018] Figure 3 This is a schematic diagram of the connection between the measuring device and the base in this utility model;

[0019] Figure 4 This is a schematic diagram of the metering device in this utility model;

[0020] Figure 5 This is a schematic diagram of the connection between the mechanical counter and the measuring device in this utility model.

[0021] Explanation of icon numbers:

[0022] 1. Base; 2. Drive wheel; 3. Motor; 4. Upper guide roller; 5. Adjusting shaft seat; 51. Guide block; 6. Adjusting screw; 7. Adjusting assembly; 8. Measuring device; 81. Guide slider; 82. Screw slider; 83. Fixed gear; 84. Counting gear; 85. Pin; 86. Limit stop; 87. Support rod; 88. Limit stop bar; 89. Spring; 9. Measuring wheel; 10. Mechanical counter; 11. Bracket; 12. Slide groove; 13. Guide groove; 14. Guide roller; 20. Cable. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings.

[0024] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of the present utility model.

[0025] like Figure 1-4 As shown, a length measuring device includes a base 1. A drive wheel 2 and an upper guide roller 4 that can be adjusted up and down are mounted on the base 1 via a bracket 11. A measuring device 8 is slidably mounted on the front end of the base 1. An adjustment component 7 for adjusting the horizontal displacement of the measuring device 8 is installed at the bottom of the base 1. A measuring wheel 9 is mounted on the measuring device 8 via a rotating shaft. The height of the measuring wheel 9 is lower than the height of the drive wheel 2. A limiting structure to prevent the measuring wheel 9 from reversing is also provided on the right side of the measuring device 8.

[0026] like Figure 3 As shown, in order to ensure that the metering wheel 9 and the drive wheel 2 are misaligned to maintain the tension of the cable 20, the adjustment assembly 7 includes an adjustment screw installed in the bottom mounting groove of the base 1. The bottom of the metering device 8 is slidably mounted on the adjustment screw via a screw slider 82. The lower ends of both sides of the metering device 8 are slidably mounted in the guide grooves 13 on both sides of the base 1 via guide sliders 81. An adjustment handwheel is provided on the outer end of the adjustment screw. After the adjustment screw is rotated, it drives the metering wheel to a suitable horizontal displacement, so that it is misaligned with the drive wheel to maintain the tension of the cable. This ensures that the metering wheel always maintains taut contact with the cable.

[0027] like Figure 4-5 As shown, one end of the rotating shaft of the measuring wheel 9 passes through the measuring device 8 and is fitted with a fixed gear 83. Below the fixed gear 83, a counting gear 84 is connected to the gear meshing transmission. The shaft of the counting gear 84 is connected to the mechanical counter 10. The mechanical counter 10 is mounted on the outer wall of the measuring device 8 via a mounting plate.

[0028] like Figure 5 As shown, to prevent the fixed gear 83 from rotating in the reverse direction and affecting the cable length measurement, the limiting structure includes a limiting baffle 86. One end of the limiting baffle 86 is mounted on the outer wall of the measuring device 8 via a pin 85, and the other end of the limiting baffle 86 abuts against the lower end of the fixed gear 83. A limiting rod 88 is provided above the limiting baffle 86, and the limiting rod 88 fits against the limiting baffle 86. A support rod 87 is provided below the limiting baffle 86, and a spring 89 is provided on the support rod 87 to elastically support the limiting baffle 86. The support rod 87 and the limiting stop rod 88 are fixed on the outer wall of the metering device 8. When the fixed gear 83 rotates, it presses the limiting stop plate 86, which in turn presses the spring 89, allowing the fixed gear 83 to rotate normally. When the cable moves in the reverse direction, the fixed gear 83 rotates in the reverse direction. The limiting stop plate 86 is locked onto the fixed gear 83, and the limiting stop rod 88 limits the limiting stop plate 86 to prevent it from rotating, thereby preventing the fixed gear 83 from rotating in the reverse direction and preventing the metering wheel 9 from reversing.

[0029] like Figure 1-2 As shown, a motor 3 for driving the drive wheel 2 to rotate is installed on the bracket 11. An adjusting screw 6 is threaded onto the bracket 11. The bottom end of the adjusting screw 6 is connected to an adjusting shaft seat 5 through a bearing. The upper conductor roller 4 is installed on the adjusting shaft seat 5. The two sides of the adjusting shaft seat 5 are guided and slid on the slide groove 12 on the inner side wall of the bracket 11 by guide blocks 51. Rotating the adjusting screw 6 rotates on the bracket 11, thereby driving the adjusting shaft seat 5 to move downward. The adjusting shaft seat 5 drives the upper conductor roller 4 to move downward, so that the upper conductor roller 4 and the drive wheel 2 are clamped on the outer surface of the cable.

[0030] A wire guide roller 14 is installed at the front end of the base 1. A cable 20 is set on the wire guide roller 14. The cable 20 passes around the metering wheel 9 and is threaded between the drive wheel 2 and the upper wire guide roller 4. The wire guide roller 14, the metering wheel 9 and the drive wheel 2 work together to form a high-low misalignment to keep the cable 20 in a taut state. This ensures that the metering wheel 9 always keeps in taut contact with the cable 20.

[0031] In use, one end of the cable 20 is guided along the conductor roller 14, passes around the measuring wheel 9, and is threaded between the upper conductor roller 4 and the drive wheel 2. Rotation of the adjusting screw 6 causes the upper conductor roller 4 to move downwards via the adjusting shaft seat 5, clamping the upper conductor roller 4 and the drive wheel 2 onto the outer surface of the cable. Next, rotation of the adjusting screw causes the measuring device 8 and the measuring wheel 9 to move horizontally, adjusting the measuring wheel 9 to a suitable horizontal position, creating a height misalignment with the drive wheel 2 to maintain tension on the cable 20. This ensures that the measuring wheel 9 remains in taut contact with the cable, preventing the cable 20 from failing to contact the measuring wheel 9 during movement and thus preventing the measuring wheel 9 from rotating. Then, the motor 3 is started to drive the drive wheel 2 to rotate, moving the cable 20. The cable drives the measuring wheel 9 to rotate, which in turn drives the fixed gear 83 and the mechanical counter 10 to rotate. The mechanical counter 10 reads the number of rotations of the measuring wheel 9, and the length of the cable 20 is obtained based on the circumference of the measuring wheel 9, improving measurement accuracy.

Claims

1. A length measuring device comprising a base (1), characterised in that, The base (1) is provided with a drive wheel (2) and an upper guide roller (4) that can be adjusted up and down via a bracket (11). A metering device (8) is slidably provided on the front end of the base (1). An adjustment component (7) for adjusting the horizontal displacement of the metering device (8) is installed at the bottom inside the base (1). A metering wheel (9) is provided on the metering device (8) via a rotating shaft. The height of the metering wheel (9) is lower than the setting height of the drive wheel (2). A limiting structure to prevent the metering wheel (9) from reversing is also provided on the right side of the metering device (8).

2. The length measuring device as described in claim 1, characterized in that: The adjustment assembly (7) includes an adjustment screw installed in the bottom mounting groove of the base (1). The bottom of the metering device (8) is slidably mounted on the adjustment screw via a screw slider (82). The lower ends of both sides of the metering device (8) are slidably mounted in the guide grooves (13) on both sides of the base (1) via guide sliders (81). An adjustment handwheel is provided on the outer end of the adjustment screw.

3. The length measuring device as described in claim 1, characterized in that: One end of the rotating shaft of the measuring wheel (9) passes through the measuring device (8) and is fitted with a fixed gear (83). A counting gear (84) is connected to the fixed gear (83) below it. The counting gear (84) is connected to a mechanical counter (10) on its shaft. The mechanical counter (10) is mounted on the outer wall of the measuring device (8) via a mounting plate.

4. The length measuring device as described in claim 1, characterized in that: The limiting structure includes a limiting baffle (86), one end of which is mounted on the outer wall of the metering device (8) via a pin (85), and the other end of which abuts against the lower end of the fixed gear (83). A limiting rod (88) is provided above the limiting baffle (86), and the limiting rod (88) fits against the limiting baffle (86). A support rod (87) is provided below the limiting baffle (86), and a spring (89) is provided on the support rod (87) to elastically support the limiting baffle (86). The support rod (87) and the limiting rod (88) are fixed on the outer wall of the metering device (8).

5. The length measuring device as described in claim 1, characterized in that: The bracket (11) is equipped with a motor (3) for driving the drive wheel (2) to rotate. An adjusting screw (6) is threaded onto the bracket (11). The bottom end of the adjusting screw (6) is connected to an adjusting shaft seat (5) through a bearing. An upper guide roller (4) is installed on the adjusting shaft seat (5). The two sides of the adjusting shaft seat (5) are guided and slid on the slide groove (12) on the inner side wall of the bracket (11) through guide blocks (51).

6. The length measuring device as described in claim 1, characterized in that: A wire roller (14) is installed at the front end of the base (1). A cable (20) is installed on the wire roller (14). The cable (20) passes around the metering wheel (9) and runs between the drive wheel (2) and the upper wire roller (4).

Images