A length measuring device

Abstract

This utility model discloses a length measuring device, including a base, a translation mechanism, a grating ruler, a movable clamping member, and a fixed clamping member. The translation mechanism is mounted on the base; the fixed clamping member is located at one end of the translation mechanism along its translation direction; the movable clamping member is mounted on the translation mechanism and driven by the translation mechanism, moving in a direction away from or towards the fixed clamping member; the grating ruler includes a scale grating and a reading head that slides along the length direction of the scale grating, the scale grating being parallel to the driving direction of the translation mechanism, and the reading head being connected to the movable clamping member. This utility model's length measuring device is convenient to operate and provides accurate test results.

Description

Technical Field

[0001] This utility model relates to the field of size measuring instruments, and in particular to a length measuring device. Background Technology

[0002] Before some precision instruments can be used for testing, they often need to meet their own precise length or calibration requirements in order to obtain accurate test results; existing technology lacks easy-to-use equipment for accurately measuring the calibration rods of length measuring instruments and concrete expansion measuring instruments. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a length measuring device that is easy to operate and use, and provides accurate test results.

[0004] The technical solution of this utility model is as follows:

[0005] A length measuring device, characterized in that it comprises:

[0006] The translation mechanism is located on the base;

[0007] A fixed clamping element is located at one end of the translation mechanism in the translation direction;

[0008] A movable clamping member is mounted on a translation mechanism and is driven and connected by the translation mechanism to move in a direction away from or close to the fixed clamping member;

[0009] A grating ruler includes a scale grating and a reading head that slides along the length of the scale grating. The scale grating is parallel to the driving direction of the translation mechanism, and the reading head is connected to a movable clamping member.

[0010] In a further technical solution, the translation mechanism includes a support base, a support plate, a lead screw, and a rotating handle. The fixed clamping member is fixedly disposed at one end of the support base, and the support plate is disposed on the translation mechanism at the end away from the fixed clamping member. The movable clamping member is slidably disposed on the support base and is located between the support plate and the fixed clamping member. The lead screw is horizontally disposed, and the movable clamping member is provided with a nut that matches the lead screw. The lead screw passes through the nut on the movable clamping member, and its two ends are rotatably connected to the fixed clamping member and the support plate, respectively. The end of the lead screw connected to the support plate extends to the side of the support plate away from the fixed clamping member and is connected to the rotating handle.

[0011] In a further technical solution, the support base is provided with a slide rail along its length, and the movable clamping member is slidably connected to the slide rail.

[0012] In a further technical solution, the fixed clamping component includes a fixed clamping seat and a detachable fixed clamping block disposed on the top of the fixed clamping seat. The fixed clamping seat is connected to the support seat, and the end of the lead screw is rotatably connected to the fixed clamping seat. The movable clamping component includes a movable clamping seat and a detachable movable clamping block disposed on the top of the movable clamping seat. The nut is disposed in the middle of the movable clamping seat, and the bottom of the movable clamping seat is slidably connected to the slide rail. The reading head is disposed on the movable clamping seat.

[0013] In a further technical solution, the support base is provided with a separate pad, and the top of the pad is provided with a V-shaped groove.

[0014] In a further technical solution, the pad is located in the middle of the support base, and a through groove is provided in the middle of the bottom of the pad for the lead screw to pass through.

[0015] In a further technical solution, the base includes a worktable and a support at the bottom of the worktable, and the translation mechanism and the grating ruler are respectively disposed on the worktable.

[0016] In a further technical solution, the bottom of the bracket is provided with adjustable feet on all four sides. Each adjustable foot includes a threaded post and a foot pad at the bottom of the threaded post. The bracket is provided with a threaded hole that matches the threaded post at the connection point of the adjustable feet.

[0017] The beneficial effects of this utility model are:

[0018] 1. When measuring length, the translation mechanism can be used to move the movable clamping part to separate the fixed clamping part and the movable clamping part. The distance between them should be greater than the size of the object to be measured. The grating ruler can then measure the length of the first movement. The object to be measured is then placed between the fixed clamping part and the movable clamping part. The translation mechanism then moves the movable clamping part in the opposite direction. The object to be measured is stably clamped by the fixed clamping part and the movable clamping part. During this period, the grating ruler can measure the length of the second movement. The difference between the two movement distances can be calculated to obtain the accurate length of the object to be measured.

[0019] 2. The translation of the moving clamp can be achieved by manually rotating the handle, which is simple in structure and easy to operate;

[0020] 3. The fixed clamping block can be disassembled relative to the fixed clamping seat, and the movable clamping block can be disassembled relative to the movable clamping seat, which makes it convenient to replace the fixed clamping block or the movable clamping block when it is worn out, so as to avoid affecting the accuracy of the test results.

[0021] 4. The pad can be selectively placed between the moving clamp and the fixed clamp to support the object to be measured and ensure stable clamping by the moving clamp and the fixed clamp;

[0022] 5. The adjustable legs of the support can be adjusted individually to ensure the stability of the worktable. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the length measuring device described in an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the translation mechanism described in an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of the pad block described in an embodiment of this utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 11. Workbench; 12. Support; 13. Threaded column; 14. Foot pad; 21. Support base; 22. Support plate; 23. Lead screw; 24. Rotary handle; 25. Slide rail; 31. Fixed clamping seat; 32. Fixed clamping block; 41. Moving clamping seat; 42. Moving clamping block; 51. Scale grating; 52. Reading head; 53. Column; 54. Digital display panel; 60. Pad block; 61. V-groove; 62. Through groove. Detailed Implementation

[0028] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0029] Example:

[0030] like Figures 1-2 As shown, a length measuring device includes a base, a translation mechanism, a grating ruler, a movable clamping component, and a fixed clamping component. The base includes a worktable 11 and a support 12 located at the bottom of the worktable 11. The translation mechanism may include a support base 21, a support plate 22, a lead screw 23, and a rotating handle 24. The fixed clamping component includes a fixed clamping seat 31 and a fixed clamping block 32. The fixed clamping block 32 has an L-shaped cross-section, with one side vertical and the other side bolted to the top of the fixed clamping seat 31. The fixed clamping seat 31 is fixedly mounted on one end of the support base 21. The support plate 22 is located on the translation mechanism at one end away from the fixed clamping member. The support base 21 has slide rails 25 on both sides along the length direction. The movable clamping member includes a movable clamping seat 41 and a movable clamping block 42. The movable clamping seat 41 is located between the support plate 22 and the fixed clamping seat 31, and its bottom is slidably connected to the slide rails 25. The movable clamping block 42 is the same as the fixed clamping block 32 and is located on the top of the movable clamping seat 41 in the same way as the fixed clamping block 32. The vertical surfaces of the fixed clamping block 32 and the movable clamping block 42 are clamping surfaces.

[0031] The lead screw 23 is set horizontally, and the middle part of the movable clamping seat 41 is provided with a nut that matches the lead screw 23. The lead screw 23 passes through the nut on the movable clamping seat 41, and its two ends are rotatably connected to the fixed clamping seat 31 and the support plate 22 respectively. One end of the lead screw 23 connected to the support plate 22 extends to the side of the support plate 22 away from the fixed clamping part and is connected to the rotating handle 24.

[0032] The grating ruler includes a scale grating 51 and a reading head 52 that slides along the length of the scale grating 51. The support base 21 and the scale grating 51 are arranged parallel to each other on the worktable 11. The scale grating 51 is parallel to the driving direction of the translation mechanism. The reading head 52 is connected to the movable clamping base 41 by bolts.

[0033] In this embodiment, the workbench 11 is also provided with a column 53, on which a digital display panel 54 of the grating ruler is installed, which is electrically connected to the reading head 52 for reading the grating ruler. This structure is the conventional structure of the existing grating ruler.

[0034] The working principle of the above technical solution is as follows:

[0035] This device can be used to accurately measure the length of the calibration rod of the comparator and the calibration rod of the concrete expansion meter. When measuring the length, rotating the handle 24 rotates the lead screw 23, which drives the moving clamp 41 to move away from the fixed clamp 31 along the slide rail 25 through the nut, separating the fixed clamp block 32 and the moving clamp block 42. The moving distance is greater than the length of the calibration rod. During the movement, the moving clamp 41 drives the reading head 52 to move. The grating ruler can obtain the length of the first movement distance. Then, the calibration rod is placed between the fixed clamp block 32 and the moving clamp block 42. Then, the handle 24 is rotated in the opposite direction, and the moving clamp 41 is moved in the opposite direction. The calibration rod is stably clamped by the fixed clamp block 32 and the moving clamp block 42. During this period, the grating ruler can obtain the length of the second movement distance. The accurate length of the calibration rod can be obtained by calculating the difference between the two movement distances.

[0036] In another embodiment, such as Figure 1-3 As shown, the support base 21 is provided with a separate pad 60. The top of the pad 60 is provided with a V-shaped groove 61, and the bottom of the pad 60 is provided with a through groove 62 for the lead screw 23 to pass through. The pad 60 can be placed stably between the two slide rails 25 on the support base 21 at any position in the middle of the support base 21.

[0037] The pad 60 can be selectively placed between the moving clamp and the fixed clamp to support the object to be tested and ensure stable clamping of the moving clamp and the fixed clamp. The V-groove 61 is adapted to calibration rods of different sizes.

[0038] In another embodiment, such as Figure 1 As shown, the bracket 12 has adjustable feet around its bottom. Each adjustable foot includes a threaded post 13 and a foot pad 14 at the bottom of the threaded post 13. The bracket 12 has threaded holes that match the threaded post 13 at the connection point of the adjustable feet.

[0039] The adjustable legs of the support 12 can be adjusted in height individually. The height of the adjustable legs can be adjusted by rotating the threaded column 13 to ensure the stability of the worktable 11.

[0040] The above embodiments merely illustrate specific implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A length measuring device, characterized in that include: The translation mechanism is located on the base; A fixed clamping element is located at one end of the translation mechanism in the translation direction; A movable clamping member is mounted on a translation mechanism and is driven and connected by the translation mechanism to move in a direction away from or close to the fixed clamping member; A grating ruler includes a scale grating and a reading head that slides along the length of the scale grating. The scale grating is parallel to the driving direction of the translation mechanism, and the reading head is connected to a movable clamping member. The translation mechanism includes a support base, a support plate, a lead screw, and a rotating handle. The fixed clamping member is fixedly mounted on one end of the support base, and the support plate is mounted on the translation mechanism at the end away from the fixed clamping member. The movable clamping member is slidably mounted on the support base and positioned between the support plate and the fixed clamping member. The lead screw is horizontally arranged, and the movable clamping member has a nut that matches the lead screw. The lead screw passes through the nut on the movable clamping member, and its two ends are rotatably connected to the fixed clamping member and the support plate, respectively. One end of the lead screw connected to the support plate extends to the side of the support plate away from the fixed clamping member and connects to the rotating handle. The support base has a slide rail along its length, and the movable clamping member is slidably connected to the slide rail. The fixed clamping component includes a fixed clamping seat and a detachable fixed clamping block disposed on the top of the fixed clamping seat. The fixed clamping seat is connected to a support seat, and the end of the lead screw is rotatably connected to the fixed clamping seat. The movable clamping component includes a movable clamping seat and a detachable movable clamping block disposed on the top of the movable clamping seat. The nut is disposed in the middle of the movable clamping seat, and the bottom of the movable clamping seat is slidably connected to the slide rail. The reading head is disposed on the movable clamping seat. The support base is provided with a separate pad, and the top of the pad is provided with a V-shaped groove; the pad is located in the middle of the support base, and the bottom of the pad is provided with a through groove for the lead screw to pass through.

2. The length measuring device according to claim 1, characterized in that The base includes a workbench and a support at the bottom of the workbench, and the translation mechanism and the grating ruler are respectively located on the workbench.

3. The length measuring device of claim 2, wherein The bracket has adjustable feet around its bottom. Each adjustable foot includes a threaded post and a foot pad at the bottom of the threaded post. The bracket has threaded holes that match the threaded post at the connection point of the adjustable feet.

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