A precision screw feeding device applied to a strain calibration system

Abstract

The utility model relates to the field of measurement calibration technology, specifically discloses a precision screw rod feeding device for strain calibration system, include: base, the movable sliding bearing seat of setting in the base, set up the feeding mechanism on the base, the feeding mechanism includes: fixed plate, the rotatable screw rod of setting in the fixed plate, handle is connected with the rotation of screw rod, wherein, the screw rod and sliding bearing seat transmission cooperation, rotates handle, can drive sliding bearing seat to make the reciprocating motion of linear direction, the utility model can make reciprocating linear bidirectional displacement, improve the accuracy of displacement reading simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of measurement and calibration technology, specifically a precision screw feed device applied to a strain calibration system. Background Technology

[0002] The strain calibration system is used for calibrating strain measurement sensors in pile dynamic testing instruments, and is also suitable for calibrating various strain sensors and small displacement measurement sensors. By applying a quantitative, minute displacement to the strain sensor under test and measuring its output, the system uses a comparison method to calibrate the amplitude linearity and repeatability of the strain sensor. Traditional micrometers are divided into two types: a fixed screw, which cannot be clamped using a clamping structure, otherwise the handle cannot be rotated; and a differential screw, which has mechanical backlash during rotation, leading to inaccurate displacement measurements and larger errors due to error accumulation. Utility Model Content

[0003] The purpose of this invention is to provide a precision screw feed device for use in strain calibration systems, so as to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: a precision screw feed device applied to a strain calibration system, comprising: Base; A movable sliding bearing seat is set inside the base; A feed mechanism mounted on the base, the feed mechanism comprising: Fixing plate; A rotatable screw mounted within a fixed plate; A handle that is rotatably connected to the screw; The screw is driven by the sliding bearing seat, and rotating the handle can drive the sliding bearing seat to make a reciprocating motion in a linear direction.

[0005] Furthermore, a bearing is sleeved on the screw, and the bearing is disposed inside the fixed plate.

[0006] Furthermore, a retaining ring is provided on one side of the bearing, and the retaining ring is connected to the fixing plate.

[0007] Furthermore, a copper sleeve is also fitted onto the screw, and the copper sleeve passes through the sliding bearing seat and engages with the threaded connection of the sliding bearing seat.

[0008] Furthermore, a linear guide rail is provided inside the base, and the sliding bearing seat moves along the linear guide rail.

[0009] Furthermore, the screw is also provided with a bushing and a lock nut, which cooperate with the retaining ring to lock the bearing.

[0010] Furthermore, it also includes a displacement sensor, which is connected to the sliding bearing housing. The displacement sensor moves with the sliding bearing housing and can read displacement data.

[0011] Furthermore, it also includes a baffle plate disposed on the base, through which the displacement sensor passes, and the displacement sensor and the screw are respectively disposed on opposite sides of the sliding bearing seat.

[0012] This utility model has the following beneficial effects: This invention utilizes a screw-structured feeding mechanism that, in conjunction with a sliding bearing seat, enables bidirectional linear forward and backward motion.

[0013] This invention uses a linkage displacement sensor to avoid the accumulation of errors transmitted between mechanical structures in traditional structures. It can also be used with a digital display device to read the values, thus avoiding the errors caused by reading with the naked eye in traditional feeding structures. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is an overall schematic diagram of the precision screw feed device applied to the strain calibration system in Example 1; Figure 2 for Figure 1 A schematic diagram of the feed mechanism; Figure 3 for Figure 1 A cross-sectional view of the location of the sliding bearing housing; Figure 4 for Figure 1 A partial cross-sectional schematic diagram. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Example 1 like Figures 1-4As shown, the precision screw feed device applied to the strain calibration system in this embodiment is mainly composed of a base 10, a sliding bearing seat 20, a feed mechanism 30, and a displacement sensor 40.

[0018] The feeding mechanism 30 is mounted on the base 10 and includes a fixed plate 31, a screw 32, a handle 33, a bearing 34, a retaining ring 35, a copper sleeve 36, a bushing 37, and a lock nut 38. The screw 32 is rotatably mounted inside the fixed plate 31. The handle 33 is rotatably connected to the screw 32. The bearing 34 is sleeved on the screw 32 and is mounted inside the fixed plate 31. A retaining ring 35 is provided on one side of the bearing 34 and is connected to the fixed plate 31. The bushing 37 and lock nut 38 are also provided on the screw 32. The bushing 37, lock nut 38, and retaining ring 35 cooperate to lock the bearing 34 and prevent axial runout. At the same time, a copper sleeve 36 is also sleeved on the screw 32. The copper sleeve 36 passes through the sliding bearing seat 20 and is threadedly engaged with the sliding bearing seat 20.

[0019] The screw 32 is driven by the sliding bearing seat 20. Rotating the handle 33 can drive the sliding bearing seat 20 to make a linear reciprocating motion. For example, rotating the handle 33 clockwise will drive the sliding bearing seat 20 forward, and rotating the handle 33 counterclockwise will drive the sliding bearing seat 20 backward.

[0020] Meanwhile, a linear guide rail 11 is provided inside the base 10, and the sliding bearing seat 20 moves along the linear guide rail 11 to ensure its linear movement.

[0021] A baffle 12 is provided on the base 10, and the displacement sensor 40 passes through the baffle 12. The displacement sensor 40 and the screw 32 are respectively set on opposite sides of the sliding bearing seat 20, and the displacement sensor 40 is fixedly connected to the sliding bearing seat 20. The displacement sensor 40 moves with the sliding bearing seat 20 and can read the displacement data. Therefore, there is no error in the mechanical structure. At the same time, it can be equipped with a conventional digital display to convert the displacement into digital data and display it accurately on the screen, thereby greatly reducing the reading error caused by visual observation.

[0022] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A precision screw feed device for use in a strain calibration system, characterized in that, include: Base; A movable sliding bearing seat is set inside the base; A feed mechanism mounted on the base, the feed mechanism comprising: Fixing plate; A rotatable screw mounted within a fixed plate; A handle that is rotatably connected to the screw; The screw is driven by the sliding bearing seat, and rotating the handle can drive the sliding bearing seat to make a reciprocating motion in a linear direction.

2. The precision screw feed device for a strain calibration system according to claim 1, characterized in that: A bearing is fitted onto the screw, and the bearing is housed within the fixed plate.

3. A precision screw feed device for a strain calibration system according to claim 2, characterized in that: A retaining ring is provided on one side of the bearing, and the retaining ring is connected to the fixing plate.

4. The precision screw feed device for a strain calibration system according to claim 1, characterized in that: A copper sleeve is also fitted onto the screw, and the copper sleeve passes through the sliding bearing seat and engages with the threaded connection of the sliding bearing seat.

5. A precision screw feed device for a strain calibration system according to claim 1, characterized in that: The base is equipped with a linear guide rail, and the sliding bearing seat moves along the linear guide rail.

6. A precision screw feed device for a strain calibration system according to claim 3, characterized in that: The screw is also provided with a bushing and a lock nut, which cooperate with the retaining ring to lock the bearing.

7. A precision screw feed device for a strain calibration system according to claim 1, characterized in that: It also includes a displacement sensor, which is connected to the sliding bearing housing. The displacement sensor moves with the sliding bearing housing and can read displacement data.

8. A precision screw feed device for a strain calibration system according to claim 7, characterized in that: It also includes a baffle plate set on the base, through which the displacement sensor passes, and the displacement sensor and the screw are respectively set on opposite sides of the sliding bearing seat.

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