Measuring caliper and method for measuring center distance between holes and distance between hole and end face

Abstract

The invention discloses a measuring caliper and a method for measuring the center distance between holes and the distance between the holes and the end face, the measuring caliper comprises a caliper body, a fixed measuring mechanism and a movable measuring mechanism, the movable measuring mechanism is connected to the caliper body in a sliding mode, and the lower end of the fixed measuring mechanism is provided with a first centering claw and three first claw rulers synchronously moving in the radial direction; the lower end of the mobile measuring mechanism is provided with a second centering claw and three second claw rulers which synchronously move in the radial direction, or an end face measuring head. The device can quickly measure the center distance between the holes of the porous pipeline or measure the distance between the holes and the end face, the measurement result is accurate, the measurement operation is convenient, the measurement time and energy are effectively saved, and the measurement efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of measuring tools, in particular to a measuring caliper for measuring the center distance between any two holes in a space and the distance between a hole and an end face. Background Art

[0002] The measuring caliper for measuring space holes and end faces is a common general-purpose measuring tool. It is mainly used to measure the inner and outer diameters, depths, spacing and other dimensions of workpieces. In order to meet the measurement of different scenarios and needs, there are many types of measuring calipers, such as vernier calipers, electronic calipers, depth calipers, etc.

[0003] However, the existing measurement methods for multi-diameter pipes are relatively cumbersome. Such pipes have multiple holes distributed on the same straight line. The center distance between the holes on the same straight line and the distance to the end face of the pipe need to be measured. The current measurement method requires the use of different tool combinations for measurement, which is not only inconvenient to carry, but also troublesome to use, time-consuming and labor-intensive. Summary of the invention

[0004] The present invention aims to provide a method for measuring the center distance between calipers and holes and the distance between a hole and an end face, which has the advantages of simple measuring process, convenient operation, accurate measuring result and convenient carrying.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] Measuring calipers, including:

[0007] A caliper body, wherein a length measuring scale is provided on the surface of the caliper body;

[0008] A fixed measuring mechanism, wherein the fixed measuring mechanism is fixedly connected to one end of the caliper body in the length direction, the fixed measuring mechanism extends in a direction perpendicular to the length direction of the caliper body, and the two ends of the fixed measuring mechanism are respectively a first knob and a first centering claw, and the first centering claw is provided with three first claw rulers, and when the first knob is rotated, the three first claw rulers move synchronously along a radial direction of a circle on the first centering claw in a plane perpendicular to the extension direction of the fixed measuring mechanism;

[0009] A mobile measuring mechanism, wherein a first end of the mobile measuring mechanism is slidably connected to the caliper body and extends in a direction parallel to the fixed measuring mechanism to form a second end, and a sliding area of ​​the mobile measuring mechanism covers a length measurement scale on the surface of the caliper body;

[0010] A second centering jaw or an end face measuring head, which is detachably connected to the second end of the mobile measuring mechanism, wherein the second centering jaw is provided with three second claw rulers, and the three second claw rulers move synchronously along the radial direction of the same circle in the same plane on the second centering jaw, and the end face measuring head includes a measuring plane, and the normal of the measuring plane is parallel to the length direction of the caliper body.

[0011] Further measuring calipers also include:

[0012] A slide groove, wherein the slide groove is provided on the surface of the caliper body;

[0013] The slider is located on the surface of the mobile measuring mechanism, and the mobile measuring mechanism is slidably connected to the caliper body through the slider placed in the slide groove.

[0014] As a solution, the fixed measuring mechanism includes:

[0015] A fixed sleeve, the fixed sleeve being fixedly connected to one end of the caliper body in the length direction;

[0016] A fixing rod, the upper end of which passes through the fixing sleeve and is rotatably connected to the first knob, the fixing rod is threadedly connected or fixedly connected to the fixing sleeve, and the lower end of the fixing rod is connected to the first centering claw;

[0017] A driving rod, one end of which is threadedly connected to the first knob, and a cone is provided at the lower end of the driving rod. The first knob is rotated relative to the fixed rod to drive the driving rod and the cone to move linearly and push the three first claw rulers to move radially synchronously. The three first claw rulers are connected to the first centering claws through a return spring, or one end of the driving rod is fixedly connected to the first knob, and the other end of the driving rod is connected to a driving gear, which meshes with the inner ring teeth of the gear ring, and the end face of the gear ring has a spiral groove, and the three first claw rulers move radially synchronously in the spiral groove of the gear ring through the helical teeth on their own surfaces.

[0018] As a solution:

[0019] The end surface of the second centering claw is fixedly connected with a second knob, which is threadedly connected to the outer surface of the fixed column and then connected to the second end of the mobile measuring mechanism. A driving rod is arranged in the fixed column, and a cone is arranged at the lower end of the driving rod. The second centering claw is driven to move relatively by rotating the second knob relative to the fixed column, thereby driving the three second claw rulers to act on the cone surface of the cone, and finally realizing the radial synchronous movement of the three second claw rulers. The three second claw rulers are connected to the second centering claw through a reset spring;

[0020] The end surface measuring head is connected to the connecting rod through a thread, and the connecting rod is connected to the second end of the mobile measuring mechanism through a thread.

[0021] As a scheme, the zero scale of the length measurement scale is located on one side of the fixed measuring mechanism, and the length measurement scale represents the straight-line distance from the center of the circle where the three first claw rulers on the fixed measuring mechanism are located to the center of the circle where the three second claw rulers on the mobile measuring mechanism are located, or the straight-line distance from the center of the circle where the three first claw rulers on the fixed measuring mechanism are located to the measuring plane of the end face measuring head on the mobile measuring mechanism.

[0022] As a solution, a surface on the movable measuring mechanism that is perpendicular to the length direction of the caliper body forms a reading surface, and the length measuring scale has removed the straight-line distance from the center of the circle where the three first claw rulers are located to the zero scale, as well as the straight-line distance from the reading surface to the center of the circle where the three second claw rulers are located or the straight-line distance from the reading surface to the measuring plane of the end face measuring head.

[0023] Further, the zero scale is located at a position where the fixed measuring mechanism intersects with the caliper body.

[0024] Furthermore, the reading surface on the movable measuring mechanism is coplanar with the measuring plane of the end face measuring head.

[0025] The method for measuring the center distance between holes uses the aforementioned measuring caliper with a second centering jaw and includes the following steps:

[0026] Step 1: insert the first centering claw into one of the holes to be measured, and make the three first claw rulers sink into the hole, and turn the first knob to drive the three first claw rulers to move radially until the ends of the three first claw rulers all touch the hole wall;

[0027] Step 2: Slide the mobile measuring mechanism on the caliper body until the second centering claw is located directly above another hole in the hole to be measured, extend the second centering claw into the hole, turn the second button to drive the three second claws to move radially, and then fine-tune the position of the mobile measuring mechanism on the caliper body until the ends of the three second claws all touch the hole wall;

[0028] Step 3: Read the value of the mobile measuring mechanism on the length measurement scale. This value is the center distance between the two holes to be measured.

[0029] The method for measuring the distance between the hole and the end face uses the aforementioned measuring caliper with an end face measuring head and comprises the following steps:

[0030] Step 1: insert the first centering claw into the hole to be measured, and make the three first claw rulers sink into the hole, turn the first knob, and drive the three first claw rulers to move radially until the ends of the three first claw rulers all touch the hole wall;

[0031] Step 2: Slide the measuring mechanism on the caliper body until the measuring plane of the end face measuring head is in close contact with the end face to be measured;

[0032] Step three, read out the value of the mobile measuring mechanism on the length measuring scale, which is the distance between the hole to be measured and the end face.

[0033] Compared with the prior art, the present invention has the following characteristics:

[0034] 1. The present invention is based on a vernier caliper and combines the principle of three-jaw chuck centering. It can quickly measure porous pipes through a combination of a fixed measuring mechanism and a mobile measuring mechanism. The measuring caliper can quickly measure the center distance between any two holes in space and the distance between the hole and the end face, which can ensure the accuracy of the measurement, effectively save measurement time and energy, and improve measurement efficiency.

[0035] 2. When measuring the center distance of holes in the present invention, when measuring multiple pipe holes in the same row, after positioning the first hole by the fixed measuring mechanism, the mobile measuring mechanism is slid on the caliper body to limit the second centering claw of the mobile measuring mechanism in the second hole. At this time, the center distance between the two holes can be directly obtained by the relative position of the reading surface and the length measurement scale on the mobile measuring mechanism, and then the next hole distance is measured by sliding the mobile measuring mechanism. When measuring the center distance of multiple holes relative to the same hole, it is only necessary to keep the first centering claw stationary, slide the mobile measuring mechanism, and then rotate the second knob to move the second claw to measure the second hole distance. Repeating this process can quickly measure the center distance between multiple holes, effectively saving measurement time and improving measurement efficiency.

[0036] 3. The fixed sleeve and the fixed rod can realize relative movement, thereby extending or shortening, which helps to contact the bottom of holes of different depths to determine the measurement reference, and further improves the centering accuracy of the first claw ruler.

[0037] 4. When measuring the distance between the hole and the end face, the present invention only needs to replace the second centering claw with the end face measuring head, without replacing other measuring tools as a whole, which is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the three-dimensional structure of the measuring caliper with the second centering jaw of the present invention;

[0039] Figure 2 It is a schematic diagram of the three-dimensional structure of the measuring caliper with the end surface measuring head of the present invention;

[0040] Figure 3 for Figure 1 The main view;

[0041] Figure 4 for Figure 2 The main view;

[0042] Figure 5This is a partial enlarged view of the fixed measuring mechanism;

[0043] Figure 6 It is a partial enlarged view of the mobile measuring mechanism with the second centering claw;

[0044] Figure 7 It is a partial enlarged view of the mobile measuring mechanism with the end face measuring head;

[0045] In the figure: 1. caliper body; 2. fixed measuring mechanism; 3. slide groove; 4. mobile measuring mechanism; 5. length measuring scale; 6. slide block; 8. fixed sleeve; 9. fixed rod; 10. first knob; 11. first centering claw; 12. first claw scale; 13. fixed column; 14. second knob; 15. second centering claw; 16. second claw scale; 17. end face measuring head; 18. connecting rod. DETAILED DESCRIPTION

[0046] The present invention is further described below in conjunction with specific embodiments, but it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above-mentioned technical ideas of the present invention, various modifications, substitutions and changes made according to common technical knowledge and customary means in the field are included in the scope of the present invention.

[0047] See also Figure 1 to Figure 7 , a measuring caliper designed by the present invention for measuring the center distance between any two holes in a space and the distance between a hole and an end face, comprises a caliper body 1, a fixed measuring mechanism 2 and a movable measuring mechanism 4. The surface of the caliper body 1 has a length measuring scale 5, the end of the fixed measuring mechanism 2 is connected to a first centering claw 11, and the lower end of the movable measuring mechanism 4 is detachably connected to a second centering claw 15 or an end face measuring head 17. The measuring caliper can quickly measure the center distance between any two holes on a porous pipe by centering in two holes respectively by the first centering claw 11 and the second centering claw 15. When the second centering claw 15 is replaced with the end face measuring head 17, the measuring caliper can also quickly measure the distance between the hole and the end face. The measuring caliper is based on the characteristics of a vernier caliper and the three-jaw centering principle, which ensures the accuracy of its measurement, effectively saves measurement time and energy, and improves measurement efficiency.

[0048] The functions and structural features of each component in the measuring caliper are as follows:

[0049] The surface of the caliper body 1 is provided with a length measurement scale 5, and the zero scale of the length measurement scale 5 is located on one side of the fixed measuring mechanism 2. The length measurement scale 5 represents the straight-line distance from the center of the circle where the three first claw scales 12 on the fixed measuring mechanism 2 are located to the center of the circle where the three second claw scales 16 on the mobile measuring mechanism 4 are located; the zero scale is located at the intersection of the fixed measuring mechanism 2 and the caliper body 1; a surface on the mobile measuring mechanism 4 that is perpendicular to the length direction of the caliper body 1 forms a reading surface (for example Figure 1 The left end face of the mobile measuring mechanism 4 is shown in the figure, and the length measuring scale 5 includes the straight-line distance from the reading surface to the center of the circle where the three second claw rulers 16 are located ( Figure 2 The measuring plane of the middle end face measuring head 17 is coplanar with the reading surface), and the straight-line distance from the center of the circle where the three first claw rulers 12 are located to the zero scale. At this time, the reading of the length measuring scale 5 is the actual measured center distance between holes or the distance between the hole and the end face;

[0050] The fixed measuring mechanism 2 is fixedly connected to one end of the caliper body 1 in the length direction, and the fixed measuring mechanism 2 extends in a direction perpendicular to the length direction of the caliper body 1, and the two ends of the fixed measuring mechanism 2 are respectively a first knob 10 and a first centering claw 11, and there are three first claw rulers 12 on the first centering claw 11. When the first knob 10 is rotated, the three first claw rulers 12 move synchronously along the radial direction of a circle on the first centering claw 11 in a plane perpendicular to the extension direction of the fixed measuring mechanism 2; the fixed measuring mechanism 2 specifically includes a first knob 10, a driving rod, a fixed sleeve 8 and a fixed rod 9, the upper end of the fixed rod 9 passes through the fixed sleeve 8 and is rotatably connected to the first knob 10, and the fixed rod 9 is threadedly connected to the fixed sleeve 8 The lower end of the fixed rod 9 is connected to the first centering claw 11; one end of the driving rod is threadedly connected to the first knob 10, and a cone is provided at the lower end of the driving rod. The first knob 10 is rotated relative to the fixed rod 9 to drive the driving rod and the cone to move linearly and push the three first claw rulers 12 to move radially synchronously (that is, the outer diameter of the cone in contact with the three first claw rulers 12 changes continuously during the linear movement of the cone to achieve radial synchronous movement of the three first claw rulers 12). The three first claw rulers 12 are connected to the first centering claw 11 through a reset spring. The reset spring provides a force for the three first claw rulers 12 to return to their initial positions, and the contraction and expansion of the first claw rulers 12 are achieved under the coordinated use of the cone and the reset spring.

[0051] The first end of the mobile measuring mechanism 4 is slidably connected to the caliper body 1 and extends in a direction parallel to the fixed measuring mechanism 2 to form a second end. The sliding area of ​​the mobile measuring mechanism 4 covers the length measuring scale 5 on the surface of the caliper body 1.

[0052] The second centering claw 15 or the end face measuring head 17 is detachably connected to the second end of the mobile measuring mechanism 4, wherein the second centering claw 15 is provided with three second claw rulers 16, and the three second claw rulers 16 move synchronously along the radial direction of the same circle in the same plane on the second centering claw 15, and the end face measuring head 17 includes a measuring plane, and the normal of the measuring plane is parallel to the length direction of the caliper body 1; specifically, the end face of the second centering claw 15 is fixedly connected to the second knob 14, and the second knob 14 is threadedly connected to the outer surface of the fixing column 13 and then connected to the mobile measuring mechanism 4, and the fixing column A driving rod is arranged inside 13, and a cone is arranged at the lower end of the driving rod. By rotating the second knob 14 relative to the fixed column 13, the second centering claw 15 is driven to move relatively, thereby driving the three second claw rulers 16 to act on the cone surface of the cone (the same as the action principle of the first claw ruler 12 and the cone at the lower end of the driving rod), and finally realizing the radial synchronous movement of the three second claw rulers 16, and the three second claw rulers 16 are connected to the second centering claw 15 through a reset spring; specifically, the end face measuring head 17 is connected to the connecting rod 18 through a thread, and the connecting rod 18 is connected to the second end of the mobile measuring mechanism 4 through a thread;

[0053] The slide groove 3 is provided on the surface of the caliper body 1;

[0054] The slider 6 is located on the surface of the movable measuring mechanism 4 , and the movable measuring mechanism 4 is slidably connected to the caliper body 1 via the slider 6 disposed in the slide groove 3 .

[0055] The method for measuring the center distance between holes uses the aforementioned measuring caliper with the second centering jaw 15 and includes the following steps:

[0056] Step 1: insert the first centering claw 11 into a hole in the hole to be measured, and make the three first claw rulers 12 sink into the hole, turn the first knob 10, and drive the three first claw rulers 12 to move radially until the ends of the three first claw rulers 12 all touch the hole wall;

[0057] Step 2: Slide the mobile measuring mechanism 4 on the caliper body 1 until the second centering claw 15 is located directly above another hole in the hole to be measured, extend the second centering claw 15 into the hole, turn the second button 14 to drive the three second claw rulers 16 to move radially, and then fine-tune the position of the mobile measuring mechanism 4 on the caliper body 1 until the ends of the three second claw rulers 16 all touch the hole wall;

[0058] Step three, read out the value of the mobile measuring mechanism 4 on the length measuring scale 5, which is the center distance between the two holes to be measured.

[0059] The method for measuring the distance between the hole and the end face uses the aforementioned measuring caliper with the end face measuring head 17 and includes the following steps:

[0060] Step 1: insert the first centering claw 11 into the hole to be measured, and make the three first claw rulers 12 sink into the hole, turn the first knob 10, and drive the three first claw rulers 12 to move radially until the ends of the three first claw rulers 12 all touch the hole wall;

[0061] Step 2: Slide the measuring mechanism 4 on the caliper body 1 until the measuring plane of the end face measuring head 17 is in close contact with the end face to be measured;

[0062] Step three, read out the value of the moving measuring mechanism 4 on the length measuring scale 5, which is the distance between the hole to be measured and the end face.

[0063] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims.

Claims

1. A measuring caliper, characterized in that include: A caliper body (1), wherein a length measuring scale (5) is provided on the surface of the caliper body (1); A fixed measuring mechanism (2), the fixed measuring mechanism (2) being fixedly connected to one end of the caliper body (1) in the length direction, the fixed measuring mechanism (2) extending in a direction perpendicular to the length direction of the caliper body (1), and the two ends of the fixed measuring mechanism (2) being respectively a first knob (10) and a first centering claw (11), the first centering claw (11) being provided with three first claw rulers (12), and when the first knob (10) is rotated, the three first claw rulers (12) move synchronously in a radial direction of a circle on the first centering claw (11) in a plane perpendicular to the extension direction of the fixed measuring mechanism (2); A mobile measuring mechanism (4), wherein a first end of the mobile measuring mechanism (4) is slidably connected to the caliper body (1) and extends in a direction parallel to the fixed measuring mechanism (2) to form a second end, and a sliding area of ​​the mobile measuring mechanism (4) covers a length measuring scale (5) on the surface of the caliper body (1); A second centering claw (15) or an end face measuring head (17), wherein the second centering claw (15) or the end face measuring head (17) is detachably connected to the second end of the movable measuring mechanism (4), wherein the second centering claw (15) is provided with three second claw rulers (16), and the three second claw rulers (16) move synchronously along the radial direction of the same circle in the same plane on the second centering claw (15), and the end face measuring head (17) includes a measuring plane, and the normal of the measuring plane is parallel to the length direction of the caliper body (1).

2. The measuring caliper according to claim 1, characterized in that Also includes: A slide groove (3), wherein the slide groove (3) is provided on the surface of the caliper body (1); A slider (6) is located on the surface of the mobile measuring mechanism (4), and the mobile measuring mechanism (4) is slidably connected to the caliper body (1) via the slider (6) disposed in the slide groove (3).

3. The measuring caliper according to claim 1, characterized in that: The fixed measuring mechanism (2) comprises: A fixed sleeve (8), wherein the fixed sleeve (8) is fixedly connected to one end of the caliper body (1) in the length direction; A fixing rod (9), the upper end of which passes through the fixing sleeve (8) and is rotatably connected to the first knob (10), the fixing rod (9) and the fixing sleeve (8) are threadedly connected or fixedly connected, and the lower end of the fixing rod (9) is connected to the first centering claw (11); A driving rod, one end of which is threadedly connected to a first knob (10), a cone is provided at the lower end of the driving rod, and the first knob (10) is rotated relative to the fixed rod (9) to drive the driving rod and the cone to move linearly and push the three first claws (12) to move radially synchronously, the three first claws (12) are connected to the first centering claw (11) via a return spring, or one end of the driving rod is fixedly connected to the first knob (10), the other end of the driving rod is connected to a driving gear, the driving gear is meshed with the inner ring teeth of the gear ring, the end face of the gear ring has a spiral groove, and the three first claws (12) move radially synchronously in the spiral groove of the gear ring through the helical teeth on their own surfaces.

4. The measuring caliper according to claim 1, characterized in that: The end surface of the second centering claw (15) is fixedly connected with a second knob (14), and the second knob (14) is threadedly connected to the outer surface of the fixed column (13) and then connected to the second end of the movable measuring mechanism (4). A driving rod is arranged in the fixed column (13), and a cone is arranged at the lower end of the driving rod. By rotating the second knob (14) relative to the fixed column (13), the second centering claw (15) is driven to move relative to the fixed column (13), thereby driving the three second claw rulers (16) to act on the cone surface of the cone, and finally realizing the radial synchronous movement of the three second claw rulers (16). The three second claw rulers (16) are connected to the second centering claw (15) through a reset spring. The end surface measuring head (17) is connected to a connecting rod (18) via a thread, and the connecting rod (18) is connected to the second end of the mobile measuring mechanism (4) via a thread.

5. The measuring caliper according to claim 1, characterized in that: The zero mark of the length measurement scale (5) is located on one side of the fixed measuring mechanism (2), and the length measurement scale (5) represents the straight-line distance from the center of the circle where the three first claw scales (12) on the fixed measuring mechanism (2) are located to the center of the circle where the three second claw scales (16) on the mobile measuring mechanism (4) are located, or the straight-line distance from the center of the circle where the three first claw scales (12) on the fixed measuring mechanism (2) are located to the measuring plane of the end surface measuring head (17) on the mobile measuring mechanism (4).

6. The measuring caliper according to claim 5, characterized in that: A surface on the movable measuring mechanism (4) perpendicular to the length direction of the caliper body (1) forms a reading surface, and the length measuring scale (5) has been deducted from the straight-line distance from the center of the circle where the three first claw scales (12) are located to the zero scale, and the straight-line distance from the reading surface to the center of the circle where the three second claw scales (16) are located or the straight-line distance from the reading surface to the measuring plane of the end face measuring head (17).

7. The measuring caliper according to claim 5, characterized in that: The zero scale is located at the intersection of the fixed measuring mechanism (2) and the caliper body (1).

8. The measuring caliper according to claim 6, characterized in that: The reading surface on the mobile measuring mechanism (4) is coplanar with the measuring plane of the end face measuring head (17).

9. A method for measuring the center distance between holes, characterized in that: The measuring caliper with the second centering jaw (15) of claim 1 is used, and comprises the following steps: Step 1: insert the first centering claw (11) into a hole in the hole to be measured, and make the three first claw rulers (12) sink into the hole, turn the first knob (10), and drive the three first claw rulers (12) to move radially until the ends of the three first claw rulers (12) all contact the hole wall; Step 2: Slide the mobile measuring mechanism (4) on the caliper body (1) until the second centering claw (15) is located directly above another hole in the hole to be measured, extend the second centering claw (15) into the hole, turn the second button (14), drive the three second claw rulers (16) to move radially, and then fine-tune the position of the mobile measuring mechanism (4) on the caliper body (1) until the ends of the three second claw rulers (16) all contact the hole wall; Step 3: Read the value of the moving measuring mechanism (4) on the length measuring scale (5). This value is the center distance between the two holes to be measured.

10. A method for measuring the distance between a hole and an end face, characterized in that: The measuring caliper with the end face measuring head (17) of claim 1 is used, and the following steps are included: Step 1: insert the first centering claw (11) into the hole to be measured, and make the three first claw rulers (12) sink into the hole, turn the first knob (10), and drive the three first claw rulers (12) to move radially until the ends of the three first claw rulers (12) all contact the hole wall; Step 2: Slide the measuring mechanism (4) on the caliper body (1) until the measuring plane of the end face measuring head (17) is in close contact with the end face to be measured; Step three, read out the value of the moving measuring mechanism (4) on the length measuring scale (5), which is the distance between the hole to be measured and the end face.

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