Horizontal hole measuring equipment and measuring method

Abstract

The invention discloses a horizontal hole measuring device and method, and the device comprises a movable block, the peripheral surface of the movable block is in a rectangular pyramid shape, and one end of the movable block is fixedly provided with a measuring rod; the limiting seat is fixedly installed at the moving end of a measuring equipment moving mechanism, a rectangular pyramid-shaped through hole is formed in the limiting seat and matched with the peripheral face of the movable block, the axis of the through hole is in the horizontal direction, and the inner wall face of the lower side of the through hole supports the movable block in the vertical face direction. The driving rod is in transmission connection with the other end of the movable block; an included angle is formed between the axis of the driving rod and the axis of the through hole; wherein the driving rod moves in the axis direction, drives the movable block to move in the through hole, changes the axial distance between the movable block and the through hole and further changes the distance between the peripheral face of the movable block and the inner wall face of the through hole, when the distance is larger than zero, the movable block can swing in the through hole under the action of external force, and the overall size is reduced; while ensuring that the measuring rod has a floating function, the directivity of the measuring rod before entering the measured hole is improved, and collision and scratch in the measuring process are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of measuring equipment, in particular to a horizontal hole measuring equipment and a measuring method. Background Art

[0002] With the rapid development of measurement technology and the improvement of automated production level, the measurement of apertures in the process of parts processing has gradually been automated. In the process of automated aperture measurement, it is often necessary to insert the measuring rod into the hole to be measured for measurement. Since the diameter of the measuring rod is generally slightly smaller than the inner diameter of the hole to be measured, and the machining accuracy and position accuracy of the hole to be measured on the part are different, in order to ensure that the measuring rod can smoothly extend into the hole to be measured, the measuring rod needs to be floatingly installed on the moving mechanism of the measuring equipment, so that the measuring rod can float with the position of the hole when inserted into the hole to be measured.

[0003] For measuring equipment for measuring horizontal holes, such as measuring horizontal long holes (crankshaft holes) on cylinder structures, the measuring rod is a large measuring body. In order to realize the floating function of the measuring rod, a lever structure is used to suspend the measuring rod on a moving mechanism, and a counterweight balance block is used to balance the gravity of the suspended measuring rod.

[0004] The above-mentioned horizontal hole measuring device has the following disadvantages:

[0005] 1. The counterweight structure takes up a large space;

[0006] 2. The counterweight structure increases the overall weight and manufacturing cost of the measuring equipment, and also increases the floating resistance of the measuring rod in the measured hole, which may seriously wear the inner wall of the measured hole and cannot meet the high quality requirements of the hole wall;

[0007] 3. The positioning accuracy of the floating measuring rod before it is inserted into the measured hole is difficult to control, and it is easy to collide with the hole of the part, which places high requirements on equipment installation and debugging. Summary of the invention

[0008] In view of the shortcomings in the above-mentioned existing production technology, the applicant provides a horizontal hole measuring device and a measuring method, thereby reducing the overall size of the measuring equipment, ensuring that the measuring rod has a floating function, and improving the directionality of the measuring rod before entering the measured hole, facilitating the control of the positioning accuracy of the measuring rod, and avoiding bumps and scratches during the measurement process.

[0009] The technical solution adopted by the present invention is as follows:

[0010] A horizontal hole measuring device, comprising

[0011] A movable block, the outer peripheral surface of which is in the shape of a quadrangular pyramid, and a measuring rod is fixedly mounted on one end of the movable block;

[0012] A limit seat, fixedly mounted on the moving end of the moving mechanism of the measuring device, the limit seat is provided with a quadrangular pyramid through hole, the through hole matches the outer peripheral surface of the movable block, the axis of the through hole is in a horizontal direction, the lower inner wall surface of the through hole is located directly below the movable block, and supports the movable block along the vertical direction;

[0013] A driving rod, the driving rod is drivingly connected to the other end of the movable block, and the axis of the driving rod is arranged at an angle to the axis of the through hole;

[0014] Among them, when the driving rod moves along the axial direction of the driving rod, the driving rod drives the movable block to move in the through hole, changes the axial distance between the movable block and the through hole, and then changes the spacing between the outer peripheral surface of the movable block and the inner wall surface of the through hole. When the spacing is greater than zero, the movable block can swing in the through hole under the action of external force, and when the outer peripheral surface of the movable block contacts the inner wall surface of the through hole, the movable block is fixedly connected to the through hole.

[0015] As a further improvement of the above technical solution:

[0016] At least two adjacent planes in the outer peripheral surface of the movable block intersect with the axis of the through hole.

[0017] The quadrangular pyramid is a regular quadrangular pyramid, the angle between the inclined surface of the quadrangular pyramid and the axis of the through hole is 2°-5°, and the maximum average gap between the through hole and the movable block is 0.4mm-0.8mm.

[0018] The driving rod is provided with a pair of mutually parallel guiding inclined surfaces, and the movable block is provided with a pair of guiding rods. The driving rod is located between the two guiding rods, and each guiding rod is slidably matched with a guiding inclined surface. When the driving rod moves, the guiding rod slides on the guiding inclined surface to drive the movable block to move in the through hole.

[0019] It also includes a mounting seat, on which the limiting seat is fixedly mounted, and a pair of guide holes are provided on the mounting seat, and the driving rod is slidably connected with the guide holes.

[0020] The axis of the driving rod is perpendicular to the axis of the through hole.

[0021] It also includes a linear driver, the moving end of which is connected to the driving rod and is used to drive the driving rod to move along the axial direction of the driving rod.

[0022] The structure of the limit seat includes four limit plates, and bosses are arranged on the upper surfaces of the limit plates. The four limit plates are connected in sequence to form an annular structure, and the upper surfaces of the four bosses are connected in sequence to form the through hole.

[0023] It also includes an adapter, the adapter includes an extension tube, one end of the extension tube is provided with a first connection flange, the first connection flange is used to fix the measuring rod, the other end of the extension tube is provided with a second connection flange, the second connection flange is fixedly connected to the movable block;

[0024] The first connecting flange is an annular structure, a through hole is arranged on the extension tube, the connection end of the measuring rod corresponds to the center hole of the first connecting flange, and the center hole is connected to the inner cavity of the extension tube for leading the connecting wire of the measuring rod out from the through hole.

[0025] A horizontal hole measurement method adopts a horizontal hole measurement device, wherein a movable block is installed at the end of a measuring rod of the measurement device, and the movable block is floatingly connected to a through hole located on a moving end of a moving mechanism. The method comprises the following steps:

[0026] The workpiece to be measured is moved to the measuring station, and the measuring hole on the workpiece to be measured is in the horizontal direction;

[0027] The driving rod drives the movable block to move in the through hole, so that the movable block contacts the inner wall of the through hole and then the movable block is fixedly connected to the through hole, so that the end of the measuring rod points to the measuring hole;

[0028] After the movable block is fixedly connected to the through hole, the moving mechanism drives the measuring rod to move toward the orifice of the measuring hole. When the end of the measuring rod enters the orifice, the driving rod drives the movable block to move in the reverse direction in the through hole, so that the movable block and the through hole are restored to a floating connection state.

[0029] When the movable block and the through hole are in a floating connection state, the moving mechanism drives the measuring rod to move, and the end of the measuring rod continues to extend into the measuring hole. At the same time, the radial position of the measuring rod changes in accordance with the position change of the measuring hole.

[0030] The beneficial effects of the present invention are as follows:

[0031] The present invention has a compact and reasonable structure and is easy to operate. In the measuring rod installation structure of the measuring equipment, a matching mode of the movable block and the limit seat is set as a four-sided pyramid-shaped axial hole matching structure, and a driving rod that is at an angle to the axial direction of the four-sided pyramid is used to drive the movable block to move in the limit seat, thereby changing the gap between the movable block and the limit seat, so that the measuring rod can have a circumferential floating amount and can also be fixedly connected to the moving end of the moving mechanism, thereby ensuring that the measuring rod has a floating function and improving the directionality of the measuring rod before entering the measured hole, which is convenient for controlling the positioning accuracy of the measuring rod and avoiding bumps and scratches during the measurement process.

[0032] The present invention also includes the following advantages:

[0033] (1) The swing amplitude of the end of the measuring rod is controlled by controlling the inclination of the inclined surface of the quadrangular pyramid and the maximum average gap between the through hole and the movable block.

[0034] (2) Through the small taper design of the tetrahedron and the guide slope of the driving rod, the movable block is driven to move perpendicular to the axis of the driving rod. The small gap between the through hole and the movable block is amplified twice and converted into the axial displacement of the driving rod, which makes it easy to control the movement of the driving rod through the mechanism, realize the small floating margin control of the measuring rod, and also facilitate the realization of automation and automated control.

[0035] (3) A mounting seat for a limit seat and a mounting seat for a driving rod is provided, and the driving rod, the movable block, and the limit seat are integrated into a design to facilitate the overall modularization of the measuring rod mounting structure.

[0036] (4) The measuring rod is fixed and accurately positioned into the mouth of the measuring hole, and then the measuring rod is placed in a floating state so that the radial position of the measuring rod changes in accordance with the position of the measuring hole, thereby improving the directivity of the measuring rod before it enters the measured hole, facilitating the control of the positioning accuracy of the measuring rod and avoiding bumps and scratches during the measurement process. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of the present invention.

[0038] Figure 2 It is a cross-sectional view of the present invention.

[0039] Figure 3 for Figure 2 A partial enlarged view of point A in the middle.

[0040] Figure 4 It is a schematic diagram of the action of the present invention.

[0041] Figure 5 It is a schematic diagram of the assembly structure of the movable block of the present invention.

[0042] Figure 6 It is an exploded view of the assembly structure of the movable block of the present invention.

[0043] Figure 7 It is an exploded view of the assembly structure of the movable block of the present invention (from another perspective).

[0044] Figure 8 It is a schematic structural diagram of the limit seat of the present invention.

[0045] Fig. 9 It is a schematic structural diagram of the adapter of the present invention.

[0046] Fig.10 Schematic diagram of the structure of the adapter of the present invention (from another perspective).

[0047] in:

[0048] 1. Measuring rod; 2. Adapter; 21. First connecting flange; 22. Extension tube; 23. Perforation; 24. Second connecting flange;

[0049] 3. Mounting seat; 31. Guide hole;

[0050] 4. Limit seat; 40. Through hole; 41. Limit plate; 42. Boss;

[0051] 5. driving rod; 51. guiding inclined plane;

[0052] 6. Movable block; 61. Guide rod; 62. Avoidance groove. DETAILED DESCRIPTION

[0053] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0054] like Figure 1-Figure 7 As shown, a horizontal hole measuring device according to an embodiment of the present application includes a moving mechanism, a movable block 6 , a limit seat 4 and a driving rod 5 .

[0055] A movable block 6, the outer peripheral surface of the movable block 6 is in the shape of a quadrangular pyramid, and one end of the movable block 6 is fixedly mounted with the measuring rod 1;

[0056] The limit seat 4 is fixedly mounted on the moving end of the moving mechanism of the measuring device. A through hole 40 in the shape of a quadrangular pyramid is provided on the limit seat 4. The through hole 40 matches the outer peripheral surface of the movable block 6. The axis of the through hole 40 is in a horizontal direction. The lower inner wall surface of the through hole 40 is located directly below the movable block 6, supporting the movable block 6 along the vertical direction.

[0057] A driving rod 5, the driving rod 5 is drivingly connected to the other end of the movable block 6, and the axis of the driving rod 5 is arranged at an angle to the axis of the through hole 40;

[0058] Among them, when the driving rod 5 moves along the axial direction of the driving rod 5, the driving rod 5 drives the movable block 6 to move in the through hole 40, changes the axial distance between the movable block 6 and the through hole 40, and then changes the distance between the outer peripheral surface of the movable block 6 and the inner wall surface of the through hole 40. When the distance is greater than zero, the movable block 6 can swing in the through hole 40 under the action of external force. When the outer peripheral surface of the movable block 6 contacts the inner wall surface of the through hole 40, the movable block 6 is fixedly connected to the through hole 40.

[0059] The measuring hole is a horizontal long hole. The moving mechanism of the measuring equipment is used to drive the measuring rod 1 to move in the horizontal direction and then enter and exit the measuring hole. The aperture of the measuring hole generally has a chamfered structure, and the end of the measuring rod 1 also has a chamfered structure. The outer peripheral surface of the movable block 6 is in surface contact with the inner wall surface of the through hole 40. After the movable block 6 is fixedly connected to the through hole 40, the measuring rod 1 is fixedly connected to the moving end of the moving mechanism, which can achieve precise positioning of the end of the measuring rod 1 and the measuring hole. The chamfered structure can assist the end of the measuring rod 1 to enter the aperture of the measuring hole. When the distance between the outer peripheral surface of the movable block 6 and the inner wall surface of the through hole 40 is greater than zero, the measuring rod 1 is in a floating state. When the end of the measuring rod 1 enters the aperture of the measuring hole, the measuring rod 1 is in a floating state, and the measuring rod 1 can change with the position of the measuring hole.

[0060] The lower inner wall surface of the through hole 40 supports the movable block 6 along the vertical plane direction, which means that the movable block 6 is supported by the lower inner wall surface of the through hole 40 and is located in the vertical plane, with the direction facing upward. The specific direction can be vertically upward or have a certain angle with the vertical direction.

[0061] Furthermore, the axis of the driving rod 5 and the axis of the through hole 40 are perpendicular to each other, preferably in the vertical direction, so as to further reduce the horizontal dimension of the measuring device.

[0062] In the measuring rod 1 installation structure of the measuring equipment, the matching mode of the movable block 6 and the limit seat 4 is set as a tetrahedral axial hole matching structure, and the driving rod 5 which is at an angle to the axial direction of the tetrahedron is used to drive the movable block 6 to move in the limit seat 4, thereby changing the gap between the movable block 6 and the limit seat 4, so that the measuring rod 1 can have a circumferential floating amount and can also be fixedly connected to the moving end of the moving mechanism, thereby ensuring that the measuring rod has a floating function and improving the directivity of the measuring rod before entering the measured hole, facilitating the control of the positioning accuracy of the measuring rod and avoiding bumps and scratches during the measurement process.

[0063] The mounting structure of the measuring rod 1 is compact and can be easily integrated into a measuring device, so that a plurality of measuring rods 1 can be arranged side by side in a narrow space.

[0064] At least two adjacent planes in the outer circumference of the movable block 6 intersect with the axis of the through hole 40, that is, at least two adjacent planes of the four faces of the quadrangular pyramid intersect with the axis of the through hole 40. When the movable block 6 moves in the through hole 40, the outer circumference of the movable block 6 is completely in contact with the inner wall of the through hole 40, thereby realizing axial and circumferential limiting of the movable block 6, so that the movable block 6 cannot swing in the through hole 40, thereby fixing the measuring rod 1.

[0065] In an exemplary embodiment, Figure 3-Figure 7 As shown, the quadrangular pyramid is a regular quadrangular pyramid, the angle θ between the inclined surface of the quadrangular pyramid and the axis of the through hole 40 is 2°-5°, and the maximum average gap D between the through hole 40 and the movable block 6 is 0.4mm-0.8mm.

[0066] like Figure 3 As shown, the tetrahedron is a regular tetrahedron, the outer peripheral surface of the movable block 6 is a regular tetrahedron, and the through hole 40 is also a tetrahedron. When the axis of the through hole 40 and the axis of the tetrahedron are geometrically coincident, the spacing between the outer peripheral surface of the movable block 6 and the inner wall surface of the through hole 40 is equal, and the distance between the outer peripheral surface of the movable block 6 and the inner wall surface of the through hole 40 is an average gap, so that the circumferential movable range of the movable block 6 is evenly distributed.

[0067] For the measuring rod 1 which is a large measuring body of the measuring device of this embodiment, when the measuring rod 1 is in a floating state, the pressure exerted by the end of the measuring rod 1 on the inner hole is smaller than that of a counterweight-type floating structure, thereby reducing the friction force when the measuring rod 1 moves in the measuring hole and preventing the measuring rod 1 from scratching the measuring hole.

[0068] For example, Figure 3 , Figure 4 As shown, θ=3°, D=0.5mm, and the moving distance of the movable block 6 driven by the driving rod 5 is L=10mm.

[0069] Usually, the dimensional accuracy and position accuracy of the measuring hole are within 1mm, and the length of the measuring rod 1 is generally 500mm-1000mm. When controlling the swing amplitude of the mounting end of the measuring rod 1, the swing amplitude of the end of the measuring rod 1 can be controlled by controlling the inclination of the inclined surface of the quadrangular pyramid and the maximum average gap D between the through hole 40 and the movable block 6.

[0070] For example, Figure 2 , Figure 3 As shown, the length of the measuring rod 1 is 750mm, D is 0.5mm, the horizontal movement margin of the end of the measuring rod 1 is controlled at 0.5mm, and the vertical swing amplitude is controlled at about 0.5-1mm. The floating margin of the measuring rod 1 is adapted to the dimensional accuracy and position accuracy of the hole to be measured.

[0071] In an exemplary embodiment, Figure 3 , Figure 4 As shown, a pair of mutually parallel guide slopes 51 are provided on the driving rod 5, and a pair of guide rods 61 are provided on the movable block 6. The driving rod 5 is located between the two guide rods 61, and each guide rod 61 is slidably matched with a guide slope 51. When the driving rod 5 moves, the guide rod 61 slides on the guide slope 51, driving the movable block 6 to move in the through hole 40.

[0072] For example, Figure 3 As shown, the included angle α between the guide slope 51 and the axis of the driving rod 5 is 10°-15°. The guide slope 51 amplifies the moving distance L by 3.7-5.5 times and converts it into the moving distance H of the driving rod 5.

[0073] Through the small taper design of the tetrahedron and the guide slope 51 of the driving rod 5, the movable block 6 is driven to move perpendicular to the axial direction of the driving rod 5. The small gap between the through hole 40 and the movable block 6 is amplified twice and converted into the axial displacement of the driving rod 5, which makes it easy to control the movement of the driving rod 5 through the mechanism, realize the small floating margin control of the measuring rod 1, and also facilitate the realization of automatic control.

[0074] In an exemplary embodiment, it further comprises a mounting seat 3, on which a limit seat 4 is fixedly mounted, a pair of guide holes 31 are provided on the mounting seat 3, and a driving rod 5 is slidably connected with the guide holes 31. The mounting seat 3 is fixedly mounted on the moving end of the moving mechanism of the measuring device.

[0075] A mounting seat 3 for mounting a limit seat 4 and a driving rod 5 is provided, and the driving rod 5, the movable block 6, and the limit seat 4 are integrated to facilitate the overall modularization of the mounting structure of the measuring rod 1.

[0076] The movable block 6 is provided with an avoidance groove 62 for avoiding the driving rod 5 , and a guide rod 61 is installed in the avoidance groove 62 .

[0077] For example, Figure 3 , Figure 4 As shown, the guide rod 61 is a cylindrical structure. The contact area between the guide rod 61 and the guide inclined surface 51 is reduced to make the two contact linearly, so as to facilitate the movement of the movable block 6 relative to the guide rod 61.

[0078] In another exemplary embodiment, a linear drive is further included, and a moving end of the linear drive is connected to the driving rod 5 for driving the driving rod 5 to move along the axial direction of the driving rod 5 .

[0079] The linear actuator is a cylinder, a cylinder body of the cylinder is fixedly connected to the mounting seat 3 , and a piston rod of the cylinder is connected to the driving rod 5 .

[0080] In another exemplary embodiment, Figure 8 As shown, the structure of the limiting seat 4 includes four limiting plates 41 , and a boss 42 is arranged on the upper surface of the limiting plates 41 . The four limiting plates 41 are connected in sequence to form an annular structure, and the upper surfaces of the four bosses 42 are connected in sequence to form a through hole 40 .

[0081] The cross section of the limit plate 41 provided with the boss 42 is convex-shaped, which is convenient for limiting the limit plate 41 during assembly. The split design of the limit seat 4 is convenient for processing and can be installed on the mounting seat 3 by fasteners, which is convenient for local heat treatment of the limit seat 4 separately, thereby reducing manufacturing costs.

[0082] In another exemplary embodiment, Figure 1 , Figure 2 , Fig. 9 , Fig.10As shown, it also includes an adapter 2, which includes an extension tube 22, one end of which is provided with a first connection flange 21, the first connection flange 21 is used to fix the measuring rod 1, and the other end of the extension tube 22 is provided with a second connection flange 24, the second connection flange 24 is fixedly connected to the movable block 6;

[0083] The first connecting flange 21 is an annular structure, and a through hole 23 is provided on the extension tube 22. The connection terminal of the measuring rod 1 corresponds to the central hole of the first connecting flange 21. The central hole is connected to the inner cavity of the extension tube 22 for leading the connection line of the measuring rod 1 out from the through hole 23.

[0084] In an exemplary embodiment, the present application provides a horizontal hole measurement method, using the horizontal hole measurement device of any of the above embodiments, a movable block 6 is installed at the end of the measuring rod 1 of the measuring device, and the movable block 6 is floatingly connected to the through hole 40 located on the moving end of the moving mechanism, and the method includes the following steps:

[0085] Step 1: Move the workpiece to be measured to the measuring station. The measuring hole on the workpiece to be measured is in the horizontal direction. The measuring hole is a horizontal long hole. The length of the measuring rod 1 and the measuring hole is adapted, and the length is 500mm-1000mm.

[0086] Step 2: The driving rod 5 drives the movable block 6 to move in the through hole 40, and after the movable block 6 contacts the inner wall of the through hole 40, the movable block 6 is fixedly connected to the through hole 40, so that the end of the measuring rod 1 points to the measuring hole. At this time, the end of the measuring rod 1 can be accurately positioned with the orifice of the measuring hole;

[0087] Step three, after the movable block 6 is fixedly connected to the through hole 40, the moving mechanism drives the measuring rod 1 to move toward the orifice of the measuring hole. When the end of the measuring rod 1 enters the orifice, the driving rod 5 drives the movable block 6 to move in the opposite direction in the through hole 40, so that the movable block 6 and the through hole 40 are restored to a floating connection state. Under the precise positioning of step two, the end of the measuring rod 1 enters the orifice, so that the movable block 6 and the through hole 40 are restored to a floating connection state, and the measuring rod 1 can overlap on the hole wall of the measuring hole, which plays a role in guiding the position of the measuring rod 1 to change with the measuring hole, avoiding the end of the measuring rod 1 from hitting the orifice position of the part and bumping the part due to inaccurate positioning, and also reducing the friction between the measuring rod 1 and the measuring hole.

[0088] Step 4. After step 3 is completed, that is, when the movable block 6 and the through hole 40 are in a floating connection state, the moving mechanism drives the measuring rod 1 to move, and the end of the measuring rod 1 continues to extend into the measuring hole. At the same time, the radial position of the measuring rod 1 changes in accordance with the position change of the measuring hole.

[0089] Step 5: After the measurement is completed, the moving mechanism drives the measuring rod 1 to move out of the measuring hole.

[0090] The measuring rod 1 in a fixed state is made to enter the mouth of the measuring hole in a precisely positioned manner, and then the measuring rod 1 is made to be in a floating state, so that the radial position of the measuring rod 1 changes in accordance with the position of the measuring hole, thereby improving the directivity of the measuring rod 1 before entering the measured hole, facilitating the control of the positioning accuracy of the measuring rod, and avoiding bumps and scratches on the measuring hole during the measurement process.

[0091] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any form of modification may be made within the scope of protection of the present invention.

Claims

1. A horizontal hole measuring device, characterized in that: include A movable block (6), the outer peripheral surface of the movable block (6) is in the shape of a quadrangular pyramid, and a measuring rod (1) is fixedly mounted on one end of the movable block (6); A limit seat (4) is fixedly mounted on the moving end of the moving mechanism of the measuring device, and a quadrangular pyramid-shaped through hole (40) is provided on the limit seat (4), the through hole (40) matches the outer peripheral surface of the movable block (6), the axis of the through hole (40) is in a horizontal direction, and the lower inner wall surface of the through hole (40) is located directly below the movable block (6), supporting the movable block (6) along the vertical direction; A driving rod (5), the driving rod (5) being drivingly connected to the other end of the movable block (6), the axis of the driving rod (5) being arranged at an angle to the axis of the through hole (40); When the driving rod (5) moves along the axial direction of the driving rod (5), the driving rod (5) drives the movable block (6) to move in the through hole (40), thereby changing the axial distance between the movable block (6) and the through hole (40), and further changing the spacing between the outer peripheral surface of the movable block (6) and the inner wall surface of the through hole (40); when the spacing is greater than zero, the movable block (6) can swing in the through hole (40) under the action of an external force; when the outer peripheral surface of the movable block (6) contacts the inner wall surface of the through hole (40), the movable block (6) is fixedly connected to the through hole (40).

2. The horizontal hole measuring device according to claim 1, characterized in that: At least two adjacent planes in the outer peripheral surface of the movable block (6) intersect with the axis of the through hole (40).

3. The horizontal hole measuring device according to claim 2, characterized in that: The quadrangular pyramid is a regular quadrangular pyramid, the angle (θ) between the inclined surface of the quadrangular pyramid and the axis of the through hole (40) is 2°-5°, and the maximum average gap (D) between the through hole (40) and the movable block (6) is 0.4mm-0.8mm.

4. The horizontal hole measuring device according to claim 1, characterized in that: The driving rod (5) is provided with a pair of mutually parallel guiding inclined surfaces (51), and the movable block (6) is provided with a pair of guiding rods (61). The driving rod (5) is located between the two guiding rods (61), and each guiding rod (61) is slidably matched with a guiding inclined surface (51). When the driving rod (5) moves, the guiding rod (61) slides on the guiding inclined surfaces (51), thereby driving the movable block (6) to move in the through hole (40).

5. The horizontal hole measuring device according to claim 4, characterized in that: It also comprises a mounting seat (3), on which the limiting seat (4) is fixedly mounted, and a pair of guide holes (31) are provided on the mounting seat (3), and the driving rod (5) is slidably connected to the guide holes (31).

6. The horizontal hole measuring device according to claim 4, characterized in that: The axis of the driving rod (5) is perpendicular to the axis of the through hole (40).

7. The horizontal hole measuring device according to claim 4, characterized in that: It also comprises a linear drive, the moving end of which is connected to the driving rod (5) and is used to drive the driving rod (5) to move along the axial direction of the driving rod (5).

8. The horizontal hole measuring device according to claim 1, characterized in that: The structure of the limiting seat (4) comprises four limiting plates (41), the upper surfaces of the limiting plates (41) are provided with bosses (42), the four limiting plates (41) are connected in sequence to form an annular structure, and the upper surfaces of the four bosses (42) are connected in sequence to form the through hole (40).

9. The horizontal hole measuring device according to claim 1, characterized in that: It also comprises an adapter (2), the adapter (2) comprising an extension tube (22), one end of the extension tube (22) being provided with a first connection flange (21), the first connection flange (21) being used for fixedly mounting the measuring rod (1), and the other end of the extension tube (22) being provided with a second connection flange (24), the second connection flange (24) being fixedly connected to the movable block (6); The first connecting flange (21) is an annular structure. A through hole (23) is provided on the extension tube (22). The connection terminal of the measuring rod (1) corresponds to the central hole of the first connecting flange (21). The central hole is connected to the inner cavity of the extension tube (22) and is used to lead the connection line of the measuring rod (1) out from the through hole (23).

10. A horizontal hole measurement method, characterized in that: A horizontal hole measuring device is used, wherein a movable block (6) is installed at the end of a measuring rod (1) of the measuring device, and the movable block (6) is floatingly connected to a through hole (40) located at a moving end of a moving mechanism. The method comprises the following steps: The workpiece to be measured is moved to the measuring station, and the measuring hole on the workpiece to be measured is in the horizontal direction; The driving rod (5) drives the movable block (6) to move in the through hole (40), so that the movable block (6) contacts the inner wall of the through hole (40), and then the movable block (6) is fixedly connected to the through hole (40), so that the end of the measuring rod (1) points to the measuring hole; After the movable block (6) is fixedly connected to the through hole (40), the moving mechanism drives the measuring rod (1) to move toward the orifice of the measuring hole. When the end of the measuring rod (1) enters the orifice, the driving rod (5) drives the movable block (6) to move in the reverse direction in the through hole (40), so that the movable block (6) and the through hole (40) are restored to a floating connection state. When the movable block (6) and the through hole (40) are in a floating connection state, the moving mechanism drives the measuring rod (1) to move, and the end of the measuring rod (1) continues to extend into the measuring hole, while the radial position of the measuring rod (1) changes in accordance with the position change of the measuring hole.

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