Reverse thrust type linear transmission measuring unit
Through the design of the reverse push linear transmission measurement unit, the counter-pushing mechanism and reset mechanism are used to avoid the measurement contact before contacting the measurement position, which solves the problem of the linear transmission measurement unit measuring contact scratches in a small space environment, and realizes the Accurate avoidance and precise measurement.
Patent Information
- Application Number
- CN202323620379.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2033-12-29
AI Technical Summary
The linear transmission measuring unit can easily cause the measurement contact to scratch the surface of the measured part during detection, especially in a small space environment, and it is difficult to achieve precise avoidance.
A reverse push linear transmission measuring unit is designed. Through the cooperation of the fixed bracket and the movable bracket, the counter-pushing mechanism and the reset mechanism are used to avoid the measuring contact before the contact measurement position, and the contact is reset when the measurement position is reached. The surface of the part being tested is automatically avoided using the principle of needle-type single-acting cylinder and lever.
It realizes precise avoidance of the measuring contact, avoids scratches on the surface of the measured part, and is suitable for precision measurement in small space environments, especially when the two measuring units are used together, it effectively solves the problem of compact space.
Smart Images
Figure CN222258183U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of geometric quantity measurement, in particular to a reverse push type linear transmission measurement unit. Background Art
[0002] The linear transfer measurement unit should be more widely used in detection. Its characteristic is that the elastic sheet can bend and deform in the force direction of the measuring contact, thereby producing a change in relative displacement; and it has greater rigidity in the direction perpendicular to the force direction. Therefore, using this characteristic, we usually control the displacement caused by the deformation in the force direction within 2mm, and believe that the displacement caused by the deformation is 1:1, and it is used in the field of precision measurement.
[0003] When the linear transfer measurement unit is used for detection, the measuring contact often scratches the surface of the measured part. To this end, the applicant proposes a new linear transfer measurement unit, that is, the measuring contact can avoid before contacting the measurement position to avoid scratching the surface of the measured part. When the measuring contact reaches the measurement position, the avoidance posture is cancelled and reset is completed to achieve detection. Utility Model Content
[0004] The utility model aims to provide a reverse push type linear transmission measuring unit, which enables the measuring contact to avoid accurately during measurement, and is particularly effective in an environment where the size and space of smaller parts are small.
[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:
[0006] A reverse thrust linear transmission measuring unit comprises a fixed bracket and a movable bracket located above the fixed bracket, with the horizontal extension direction of the movable bracket and the fixed bracket as the front-back direction, the front and rear sides of the movable bracket and the fixed bracket are respectively connected by two elastic sheets to form a parallelogram, the movable bracket is provided with a measuring rod, and a measuring contact is installed on the front side of the measuring rod;
[0007] The fixed bracket is fixed with a fixed part extending upward, and the movable bracket is fixed with a movable part extending downward, the fixed part and the movable part correspond to each other front and back, and the movable part is located at the front side of the fixed part;
[0008] The fixed part is provided with a reset mechanism and a reverse thrust mechanism from top to bottom, the reset mechanism forms a reset fit with the movable part, and the reverse thrust mechanism is connected with the movable part through a reverse thrust connection mechanism;
[0009] Before the measuring contact can contact the measuring position, the reverse thrust mechanism applies a force forward, which acts on the movable part through the reverse thrust connection mechanism, driving the movable part to move backward, and then driving the movable bracket, the measuring rod and the measuring contact to move backward, realizing reverse thrust avoidance, and the reset mechanism completes compression at the same time; when the measuring contact reaches the measuring position, the force applied forward by the reverse thrust mechanism disappears, the reset mechanism rebounds and resets, driving the movable part to move forward, and then driving the bracket, the measuring rod and the measuring contact to move forward, so that the measuring contact contacts the surface of the measured part to realize measurement.
[0010] Preferably, the counter-thrust force mechanism comprises a needle-type single-acting cylinder mounted on the fixed portion and extending in the front-to-rear direction, and the piston rod of the needle-type single-acting cylinder faces forward.
[0011] Preferably, the reverse thrust connection mechanism comprises a lower bracket fixedly mounted on the fixed bracket, the lower bracket is provided with a guide groove extending in the front-rear direction, a connecting rod slidably matched with the guide groove is provided in the guide groove, and the connecting rod is connected to the piston rod of the needle-type single-acting cylinder;
[0012] The lower bracket is provided with a vertically extending mounting seat at its front side, the mounting seat is provided with a rotating shaft, the lever is mounted on the rotating shaft and can swing, the lower end of the lever can contact and cooperate with the connecting rod, and the upper end of the lever is located in front of the movable part and can contact and cooperate with the movable part;
[0013] The piston rod of the needle-type single-acting cylinder applies force forward, driving the connecting rod to move forward along the guide groove. The connecting rod then pushes the lower end of the lever forward. The lever swings through the shaft, causing the upper end of the lever to move backward, thereby driving the movable part and the movable bracket to move backward.
[0014] Preferably, a circular arc is provided on the rear side of the upper end of the lever to contact and cooperate with the movable part.
[0015] Preferably, the reset mechanism comprises a pressure adjustment pin which is arranged on the fixing portion and extends forward, and a compression spring is mounted on the pressure adjustment pin, and the compression spring is in contact with the movable bracket.
[0016] Preferably, the pressure adjustment pin is threadedly connected to the fixing portion, and a positioning portion is provided on the pressure adjustment pin to contact the compression spring. By adjusting the front and rear position of the pressure adjustment pin on the fixing portion, the compression spring is deformed to adjust the reset pressure.
[0017] Preferably, a gap adjustment mechanism is further provided between the reset mechanism and the counter-thrust mechanism, the gap adjustment mechanism comprising a limit screw extending forward and backward, the limit screw passing through a guide hole on the fixed part, and a limit part is provided at the rear end of the limit screw to form a limit with the guide hole, and the front end of the limit screw is fixedly connected to the movable part;
[0018] A limit nut is provided on the thread of the limit screw, and the limit nut is located at the front side of the fixing part. The backward movement amount of the measuring contact is controlled by adjusting the gap between the limit nut and the fixing part.
[0019] Preferably, a displacement sensor extending in the front-to-back direction is provided between the counter-thrust force mechanism and the gap adjustment mechanism. The displacement sensor is fixed on the fixed part, and the front end of the displacement sensor contacts the movable part. When the movable part moves forward and backward, the front end of the displacement sensor will produce a displacement change, and then the changed displacement amount is detected.
[0020] Preferably, an inner pressure plate and an outer pressure plate are fixed on both sides of the elastic sheet.
[0021] Preferably, the measuring rod is L-shaped, including a horizontal section and a vertical section, the vertical section is located in front of the horizontal section, the horizontal section is fixedly connected to the movable bracket, and the measuring contact is fixed at the upper end of the vertical section. During measurement, the measuring contact contacts the surface of the measured part.
[0022] Beneficial effects of the utility model:
[0023] 1. The utility model realizes the reverse push of the measuring contact through the reverse push force mechanism and the reverse push connection mechanism, so that the linear transmission measuring unit completes the automatic avoidance.
[0024] The utility model realizes that the measuring contact can avoid before contacting the measuring position to avoid scratching the surface of the measured part; when the measuring contact reaches the measuring position, the reset mechanism is used to reset the measuring contact to realize detection.
[0025] 2. The utility model is particularly effective when two measuring units are used in pairs. The space between the two measuring units is relatively small, and it is difficult to design a push-pull mechanism in the middle to enable the measuring contacts to avoid. Because of the limited space, if the needle-type single-acting cylinder is designed in the middle position, plus the volume of the air pipe, the two will interfere with each other, resulting in the mechanism being unusable and difficult to maintain later. Therefore, the utility model adopts a needle-type single-acting cylinder with a reverse thrust connection mechanism based on the lever principle to generate reverse thrust, so that the linear transmission measuring unit completes automatic avoidance, solving the technical problem of compact space.
[0026] 3. The utility model is widely used in measuring the outer circle of circular parts, the thickness of square parts, etc., solving the needs of paired use in small-volume parts detection and automatic measurement scenarios with relatively small space. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a structural schematic diagram of a single measuring unit of the utility model;
[0028] Figure 2 for Figure 1 Right view of;
[0029] Figure 3 Schematic diagram of two measurement units paired together.
[0030] The drawings are only used for illustrative purposes and should not be construed as limitations on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. DETAILED DESCRIPTION
[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.
[0032] like Figure 1 and Figure 2 As shown, in order to solve the technical problems of precise measurement and accurate avoidance in a smaller space scenario, this embodiment provides a reverse push linear transfer measurement unit, which enables the measuring contact to accurately avoid during measurement. It is particularly effective in an environment with a small space for detecting smaller parts.
[0033] The reverse push type linear transmission measuring unit of this embodiment includes a fixed bracket 1, which is used to fix the entire measuring unit at a position required by the measuring device. A movable bracket 11 is provided above the fixed bracket 1, and the horizontal extension direction of the movable bracket 11 and the fixed bracket 2 is the front-to-back direction. The front and rear sides of the movable bracket 11 and the fixed bracket 1 are respectively connected by two elastic sheets 8 to form a parallelogram.
[0034] During specific installation, the elastic sheet 8 is fixed to the front and rear sides of the fixed bracket 1 and the movable bracket 11 through the small pressure plate 14. At the same time, the inner pressure plate 7 and the outer pressure plate 6 are fixed on both sides of the elastic sheet 8 to increase the stability of the mechanism.
[0035] The movable bracket 11 is provided with a measuring rod 9. The measuring rod 9 is L-shaped, including a horizontal section and a vertical section, the vertical section is located at the front side of the horizontal section, the horizontal section is fixedly connected to the movable bracket by screws, and the measuring contact 10 is fixed at the upper end position of the vertical section. During measurement, the measuring contact 10 contacts the surface of the measured part.
[0036] The fixed bracket 1 is fixed with a fixed portion extending upward, and the movable bracket 11 is fixed with a movable portion extending downward. The fixed portion corresponds to the movable portion in front and back, and the movable portion is located at the front side of the fixed portion.
[0037] The fixed part is provided with a reset mechanism, a gap adjustment mechanism, a displacement sensor and a reverse thrust mechanism from top to bottom, wherein the reset mechanism forms a reset fit with the movable part, and the reverse thrust mechanism is connected with the movable part through a reverse thrust connection mechanism.
[0038] The specific structures of the above-mentioned reset mechanism, gap adjustment mechanism, displacement sensor, reverse thrust mechanism and reverse thrust connection mechanism are as follows.
[0039] The reverse thrust mechanism is a needle-type single-acting cylinder 18 (note: only spring-pressed return type), which is fixedly mounted on the fixed part through a nut 19 and extends in the front-to-back direction, with the piston rod of the needle-type single-acting cylinder 18 facing forward. The needle-type single-acting cylinder 18 generates power by connecting and disconnecting the air source of the air inlet, driving the piston rod to extend and retract.
[0040] The reverse thrust connection mechanism includes a lower bracket 2 fixedly mounted on a fixed bracket 1, a guide groove extending in the front-rear direction is provided on the lower bracket 2, a connecting rod 5 slidingly matched therewith is provided in the guide groove, the connecting rod 5 is connected to the piston rod of the needle-type single-acting cylinder 18, and the piston rod drives the connecting rod 5 to realize forward and backward movement.
[0041] The lower bracket 2 is provided with a vertically extending mounting seat at its front side, the mounting seat is provided with a pin hole, a rotating shaft 3 is installed in the pin hole, a lever 4 is mounted on the rotating shaft and can swing, the lower end of the lever 4 can contact and cooperate with the connecting rod 5, and the upper end of the lever 4 is located in front of the movable part and can contact and cooperate with the movable part. In order to cooperate smoothly, an arc is provided on the rear side of the upper end of the lever 4 to contact and cooperate with the movable part.
[0042] The reset mechanism includes a pressure adjustment pin 13 which is arranged on the fixing portion and extends forward. A compression spring 12 is mounted on the pressure adjustment pin 13 , and the compression spring 12 is in contact with the movable bracket 11 .
[0043] In order to facilitate the adjustment of the reset pressure according to different measurement objects, in this embodiment, the pressure adjustment pin 13 is threadedly connected to the fixed part, and a positioning part is provided on the pressure adjustment pin 13 to contact the compression spring. By adjusting the front and rear positions of the pressure adjustment pin 13 on the fixed part, the compression spring is driven to deform to adjust the reset pressure.
[0044] The gap adjustment mechanism includes a limit screw 15 extending forward and backward, the limit screw 15 passes through the guide hole on the fixed part, and the rear end of the limit screw 15 is provided with a limit part to form a limit with the guide hole (the head diameter of the limit screw 15 is larger than the guide hole and can serve as a limit part), and the front end of the limit screw 15 is fixedly connected to the movable part.
[0045] A limiting nut 16 is threadedly matched on the limiting screw 15 . The limiting nut 16 is located at the front side of the fixing portion. The backward movement amount of the measuring contact 10 is controlled by adjusting the gap between the limiting nut 16 and the fixing portion.
[0046] The displacement sensor 17 is fixed on the fixed part, and the front end of the displacement sensor 17 contacts the movable part. When the movable part moves forward and backward, the front end of the displacement sensor 17 will produce a displacement change, and the displacement amount can be detected by the display. The displacement sensor 17 is an inductive displacement sensor.
[0047] The working principle of the utility model is as follows:
[0048] Before the measuring contact can contact the measuring position, the piston rod of the needle-type single-acting cylinder 18 applies force forward, driving the connecting rod 5 to move forward along the guide groove, and the connecting rod 5 then pushes the lower end of the lever 4 forward, and the lever 4 swings through the shaft, so that the upper end of the lever 4 moves backward, and then drives the movable part to move backward, and then drives the movable bracket 11 and the measuring rod 9 and the measuring contact 10 to move backward, thereby achieving the avoidance effect of reverse push. At the same time, the compression spring 12 completes the compression.
[0049] When the measuring contact reaches the measuring position, the air source of the needle-type single-acting cylinder 18 is disconnected, the force applied forward by the piston rod disappears, the compression spring 12 rebounds and resets, driving the movable part to move forward, and then the movable bracket 11 and the measuring rod 9 and the measuring contact 10 move forward, and the measuring contact 10 contacts the surface of the measured part to achieve measurement.
[0050] exist Figure 3 The utility model is particularly effective in paired use. The space between the two measuring units is relatively small, and it is difficult to design a push-pull mechanism in the middle to enable the measuring contacts to avoid. Because of the limited space, if the needle-type single-acting cylinder is designed in the middle, plus the volume of the air pipe, the two will interfere with each other, resulting in the mechanism being unusable and difficult to maintain later. Therefore, the utility model adopts a needle-type single-acting cylinder in conjunction with a reverse thrust connection mechanism based on the lever principle to generate reverse thrust, so that the linear transmission measuring unit completes automatic avoidance, solving the technical problem of compact space.
[0051] The utility model is widely used in measuring the outer circle of circular parts, the thickness of square parts, etc., and solves the needs of paired use in small-volume part detection and automatic measurement scenarios with relatively small space.
[0052] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.
[0053] If the words "first", "second" and so on are used in this document to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of describing the utility model and simplifying the description. Unless otherwise stated, the above words have no special meaning.
[0054] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0055] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
Claims
1. A reverse thrust linear transmission measuring unit, comprising a fixed bracket and a movable bracket located above the fixed bracket, with the horizontal extension direction of the movable bracket and the fixed bracket as the front-to-back direction, the front and rear sides of the movable bracket and the fixed bracket are respectively connected by two elastic sheets to form a parallelogram, the movable bracket is provided with a measuring rod, and a measuring contact is installed on the front side of the measuring rod, characterized in that: The fixed bracket is fixed with a fixed part extending upward, and the movable bracket is fixed with a movable part extending downward, the fixed part and the movable part correspond to each other front and back, and the movable part is located at the front side of the fixed part; The fixed part is provided with a reset mechanism and a reverse thrust mechanism from top to bottom, the reset mechanism forms a reset fit with the movable part, and the reverse thrust mechanism is connected with the movable part through a reverse thrust connection mechanism; Before the measuring contact can contact the measuring position, the reverse thrust mechanism applies a force forward, which acts on the movable part through the reverse thrust connection mechanism, driving the movable part to move backward, and then driving the movable bracket, the measuring rod and the measuring contact to move backward, realizing reverse thrust avoidance, and the reset mechanism completes compression at the same time; when the measuring contact reaches the measuring position, the force applied forward by the reverse thrust mechanism disappears, the reset mechanism rebounds and resets, driving the movable part to move forward, and then driving the bracket, the measuring rod and the measuring contact to move forward, so that the measuring contact contacts the surface of the measured part to realize measurement.
2. The reverse thrust linear transfer measurement unit according to claim 1, characterized in that: The anti-thrust mechanism comprises a needle-type single-acting cylinder installed on the fixed part and extending in the front-rear direction, wherein the piston rod of the needle-type single-acting cylinder faces forward.
3. The reverse thrust linear transfer measurement unit according to claim 2, characterized in that: The reverse thrust connection mechanism comprises a lower bracket fixedly mounted on the fixed bracket, the lower bracket is provided with a guide groove extending in the front-rear direction, a connecting rod slidably matched with the guide groove is provided in the guide groove, and the connecting rod is connected to the piston rod of the needle-type single-acting cylinder; The lower bracket is provided with a vertically extending mounting seat at its front side, the mounting seat is provided with a rotating shaft, the lever is mounted on the rotating shaft and can swing, the lower end of the lever can contact and cooperate with the connecting rod, and the upper end of the lever is located in front of the movable part and can contact and cooperate with the movable part; The piston rod of the needle-type single-acting cylinder applies force forward, driving the connecting rod to move forward along the guide groove. The connecting rod then pushes the lower end of the lever forward. The lever swings through the shaft, causing the upper end of the lever to move backward, thereby driving the movable part and the movable bracket to move backward.
4. The reverse thrust linear transfer measurement unit according to claim 3, characterized in that: The rear side of the upper end of the lever is provided with an arc which contacts and cooperates with the movable part.
5. The reverse thrust linear transfer measurement unit according to claim 1, characterized in that: The reset mechanism comprises a pressure adjustment pin which is arranged on the fixing part and extends forward, a compression spring is installed on the pressure adjustment pin, and the compression spring is in contact with the movable bracket.
6. The reverse thrust linear transfer measurement unit according to claim 5, characterized in that: The pressure adjustment pin is threadedly connected to the fixing part. A positioning part is provided on the pressure adjustment pin to contact the compression spring. By adjusting the front and rear position of the pressure adjustment pin on the fixing part, the compression spring is deformed to adjust the reset pressure.
7. The reverse thrust linear transfer measurement unit according to claim 1, characterized in that: A gap adjustment mechanism is also provided between the reset mechanism and the counter-thrust mechanism, the gap adjustment mechanism comprising a limit screw extending forward and backward, the limit screw passing through a guide hole on the fixed part, and a limit part is provided at the rear end of the limit screw to form a limit with the guide hole, and the front end of the limit screw is fixedly connected to the movable part; A limit nut is provided on the thread of the limit screw, and the limit nut is located at the front side of the fixing part. The backward movement amount of the measuring contact is controlled by adjusting the gap between the limit nut and the fixing part.
8. The reverse thrust linear transfer measurement unit according to claim 1, characterized in that: A displacement sensor extending in the front-to-back direction is arranged between the counter-thrust force mechanism and the gap adjustment mechanism. The displacement sensor is fixed on the fixed part. The front end of the displacement sensor contacts the movable part. When the movable part moves forward and backward, the front end of the displacement sensor will produce a displacement change, and then the changed displacement amount will be detected.
9. The reverse thrust linear transfer measurement unit according to claim 1, characterized in that: An inner pressure plate and an outer pressure plate are fixed on both sides of the elastic sheet.
10. The reverse thrust linear transfer measurement unit according to claim 1, characterized in that: The measuring rod is L-shaped, including a horizontal section and a vertical section. The vertical section is located in front of the horizontal section. The horizontal section is fixedly connected to the movable bracket. The measuring contact is fixed at the upper end of the vertical section. During measurement, the measuring contact contacts the surface of the measured part.