Positioning device for pin shaft fixing seat

Abstract

The utility model discloses a positioning device for a pin shaft fixing seat. The positioning device comprises a reducing guide part, an angle measuring part and a linear distance measuring part, the variable-diameter guide component is placed in a workpiece hinge hole, the diameter size of the variable-diameter guide component can be adjusted according to the inner diameter size of the workpiece hinge hole, and the variable-diameter guide component is suitable for workpiece hinge holes with different diameters. The angle measuring component is mounted above the variable-diameter guide component, the angle measuring component and the variable-diameter guide component can rotate by 360 degrees in a workpiece hinge hole after being fixed into a whole, and the 0-degree position of the angle measuring component serves as a 0-point reference during angle positioning of the pin shaft fixing seat; the linear distance measuring part is installed on the angle measuring part and can rotate by 360 degrees on the angle measuring part, the linear distance measuring part is rotated to a preset pin shaft fixing seat installation angle, and the length of the linear distance measuring part is adjusted to a preset pin shaft fixing seat installation linear distance. According to the utility model, the accurate and efficient positioning of the pin shaft fixing seat is realized.

Description

Technical Field

[0001] The utility model relates to a pin shaft fixing seat positioning device, belonging to the technical field of excavators. Background Art

[0002] As an important engineering machinery, hydraulic excavator is widely used in construction, mining, earthwork and other projects. Its structural parts mainly include boom, dipper, turntable and other components. Each structural part is connected together through hinge holes and pins, and the pin fixing seat is used to limit the rotation of the pin to reduce wear. At present, the positioning of the pin fixing seat is to first modify the drawing positioning reference (hinge hole) to the process positioning reference (plane or straight line), and then convert the fixing seat positioning drawing size (angle + straight line distance) into the process size (vertical distance + horizontal distance), and finally use the ruler + angle ruler tool to position according to the converted process size.

[0003] The current manual marking technology has the following problems:

[0004] a) The hinge point hole cannot be used as a positioning reference when marking, and the positioning dimensions on the drawing need to be converted into a reference, which is a cumbersome process;

[0005] b) The angle dimensions of the fixing seat are different and cannot be measured, so they need to be converted into horizontal / vertical dimensions with poor accuracy;

[0006] c) The linear dimensions of each fixing seat are different and need to be converted into horizontal / vertical dimensions, which has poor accuracy;

[0007] d) The diameters of the holes at each hinge point are different, and the conversion size requires multiple calculations, which is error-prone and cumbersome;

[0008] e) Manual marking requires the use of two measuring tools and a marking pen at the same time, and requires two people to operate, which is inefficient.

[0009] The existing manual marking technology has poor positioning accuracy of the fixed seat, low efficiency and cumbersome process due to the datum transformation, dimension conversion, limitation of measuring tools and the accumulation of errors during the use of measuring tools. Summary of the invention

[0010] The utility model provides a pin shaft fixing seat positioning device, which can quickly fix the pin shaft fixing seat positioning device in a hinge point hole through a fixing part with adjustable diameter, and can quickly determine the positioning angle of the pin shaft fixing seat by adjusting the rotation angle of the positioning arm through an angle positioning part, and can determine the linear size of the fixing seat by quickly adjusting the positioning telescopic arm, thereby realizing accurate and efficient positioning of the pin shaft fixing seat.

[0011] The utility model is implemented according to the following technical solutions:

[0012] A pin fixing seat positioning device, comprising:

[0013] The variable diameter guide component is placed in the hinge hole of the workpiece and can adjust its own diameter size according to the inner diameter size of the hinge hole of the workpiece, and is used for workpiece hinge holes of different diameters;

[0014] An angle measuring component is installed above the variable diameter guide component. After the two are fixed as a whole, they can rotate 360 ​​degrees in the workpiece hinge hole, and the 0° position of the angle measuring component is used as the 0 point reference when the pin fixing seat is positioned at the angle;

[0015] The straight-line distance measuring component is installed on the angle measuring component and can rotate 360 ​​degrees on the angle measuring component to a preset pin fixing seat installation angle, and adjust the length of the straight-line distance measuring component itself to a preset pin fixing seat installation straight-line distance.

[0016] In some embodiments, the variable diameter guide component includes:

[0017] The variable diameter guide mounting plate is an annular plate as a whole, and a plurality of slideways are arranged at intervals along the circumference of the top surface thereof, and each slideway faces the center of the variable diameter guide mounting plate;

[0018] A plurality of variable diameter telescopic arms, one variable diameter telescopic arm is installed in one slideway, and a rolling component is installed on the side of the variable diameter telescopic arm facing the inner wall of the workpiece hinge hole;

[0019] The guide component is connected to the multiple variable-diameter telescopic arms, and the multiple variable-diameter telescopic arms are simultaneously driven by the guide component to move linearly in their respective slideways; when the multiple variable-diameter telescopic arms simultaneously move toward the center of the variable-diameter guide mounting plate, the diameter of the outer circular contour formed by the multiple rolling components gradually decreases; when the multiple variable-diameter telescopic arms simultaneously move toward the inner wall of the workpiece hinge hole, the diameter of the outer circular contour formed by the multiple rolling components gradually increases.

[0020] In some embodiments, the variable diameter guide mounting plate is provided with a plurality of countersunk holes I at intervals along the circumferential surface, and the plurality of countersunk holes I are arranged alternately with a plurality of slideways; the angle measuring component is provided with a plurality of countersunk holes II corresponding to the countersunk holes I; a support column is fixed between each group of countersunk holes I and countersunk holes II by tightening screws up and down, and the angle measuring component is lifted by the support of the plurality of support columns, so that the plurality of variable diameter telescopic arms can move linearly on the variable diameter guide mounting plate.

[0021] In some embodiments, the guide component comprises:

[0022] A rod-shaped component is arranged on the variable diameter guide mounting plate, and the center lines of the two coincide with each other; the lower part of the rod-shaped component is connected to a plurality of variable diameter telescopic arms, and the upper part of the rod-shaped component passes through the angle measuring component;

[0023] The pressure arm is hinged to the upper part of the rod-shaped component and forms a lever with the support component located on the angle measuring component. By lifting or pressing the pressure arm, the rod-shaped component is driven to move up and down, thereby driving multiple variable-diameter telescopic arms to move linearly.

[0024] In some embodiments, the rod-shaped component is a conical structure, which is composed of a cylinder in the upper part and a conical block in the lower part; the outer circumferential surface of the conical block is provided with a plurality of T-slots corresponding to the variable diameter telescopic arms at intervals, and the variable diameter telescopic arm is provided with a T-shaped protrusion that is matched with the T-slot, and the T-shaped protrusion and the T-slot have a clearance fit; the top end of the cylinder is provided with a radial through hole, which is hinged to the pressure arm through a pin shaft and a cotter pin.

[0025] In some embodiments, the pressure arm is provided with an arc-shaped protrusion at the hinge with the rod-shaped component, and the arc-shaped protrusion is in contact with the top surface of the supporting component and is used as a fulcrum of the lever to convert the rotation of the arc-shaped protrusion on the top surface of the supporting component into the up and down movement of the rod-shaped component through external force.

[0026] In some embodiments, at least one elastic component is installed between the rod-shaped component and the supporting component on the angle measuring component. When the pressing arm is not subjected to external force, the rolling components of the multiple variable diameter telescopic arms are pressed against the inner wall of the hinge hole of the workpiece under the elastic force of the at least one elastic component.

[0027] In some embodiments, the angle measuring component is an angle scale flange, and a scale of 0~360° is arranged along the circumferential direction at the edge of the upper plane thereof, and a reference pointing arrow structure is arranged at the 0° position as a 0-point reference when the pin shaft fixing seat is positioned at the angle; a circular hole is provided at the center of the angle scale flange, and an annular protrusion is extended upward around the periphery of the circular hole, and a guide nut is threadedly connected to the annular protrusion, and the inner hole of the annular protrusion and the inner hole of the guide nut together constitute the guide hole of the rod-shaped component in the variable diameter guide component, and the guide nut is also used as a support component of the pressure arm in the variable diameter guide component.

[0028] In some embodiments, the straight-line distance measuring component is an eccentric structure, comprising:

[0029] The linear fixed ruler is composed of a collar and a long ruler with a scale extending outward from the outer circumference of the collar, and the top surface of the long ruler is provided with a T-shaped groove along its length direction; the collar is sleeved on the annular protrusion of the angle scale flange, and the outer circumference of the annular protrusion is provided with a circle of grooves, and the retaining ring is stuck in the groove to limit the axial movement of the linear fixed ruler;

[0030] A linear telescopic ruler with a T-shaped structure comprises a vertical portion and a horizontal portion, wherein the length of the horizontal portion is not less than the length of the long ruler, and the cross-section of the horizontal portion is a T-shaped surface, which is inserted into the T-shaped slot of the linear fixed ruler, and the linear telescopic ruler is moved until the vertical portion reaches the target linear distance.

[0031] In some embodiments, a protrusion is provided on the bottom surface of the linear fixed ruler at a radial circumferential surface close to the angle scale flange, and a fastening bolt I is installed on the protrusion. The fastening bolt I is rotated so that its front end is pressed against the radial circumferential surface of the angle scale flange, thereby limiting the rotational freedom of the linear fixed ruler; a fastening bolt II is installed on the horizontal part of the linear telescopic ruler at an end away from the vertical part, and the fastening bolt II is rotated so that its front end is pressed against the linear fixed ruler, thereby limiting the telescopic freedom of the linear telescopic ruler.

[0032] Beneficial effects of the utility model:

[0033] 1. The variable diameter telescopic arm structure is adopted, and the outer diameter of the pin fixing seat positioning device is driven to change through the pressure arm structure, so that one pin fixing seat positioning device can be compatible with the positioning work of pin fixing seats of various sizes. The pin fixing seat positioning device is installed in the hinge point hole and can adjust the angle quickly and smoothly. The entire pin fixing seat positioning device is easy to operate and has high compatibility;

[0034] 2. The pin fixing seat positioning device is equipped with an angle scale and a linear scale, which can quickly adjust the stroke and is compatible with a variety of products;

[0035] 3. The various structures of the pin shaft fixing seat positioning device are connected by fasteners or simple support columns, so that the entire device is lightweight and simple. The entire pin shaft fixing seat positioning device can be operated by one person, which improves the working efficiency;

[0036] 4. Each mechanism is mechanically connected, which allows for quick assembly and disassembly, making daily maintenance easy. In addition, a larger or smaller compatibility range can be achieved by changing the size of individual mechanisms. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation on the present invention. Obviously, the accompanying drawings described below are only some embodiments. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0038] In the attached picture:

[0039] Figure 1 It is a general schematic diagram of the positioning device of the pin fixing seat of the utility model;

[0040] Figure 2 This is a schematic diagram of the use of the pin fixing seat positioning device of the utility model on a workpiece;

[0041] Figure 3 It is a schematic diagram of a rod-shaped component of the utility model;

[0042] Figure 4 This is a schematic diagram of the angle scale flange of the utility model;

[0043] Figure 5 This is a schematic diagram of a straight line fixed ruler of the utility model;

[0044] Figure 6 It is a schematic diagram of the variable diameter telescopic arm of the utility model;

[0045] Figure 7 for Figure 2 A partial enlarged view of .

[0046] Explanation of the reference numerals in the accompanying drawings: 1. hinge hole of workpiece; 2. angle scale flange; 3. guide nut; 4. rod-shaped component; 5. pressure arm; 6. cylindrical helical compression spring; 7. variable diameter guide mounting plate; 8. variable diameter telescopic arm; 9. bull's eye bearing; 10. support column; 11. linear fixing ruler; 12. linear telescopic ruler; 13. knurled high head screw; 14. hexagon socket head screw; 15. pin; 16. cotter pin; 17. retaining ring; 18. pin fixing seat.

[0047] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0049] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0050] 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 an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] like Figure 1 , Figure 2 , Figure 7 As shown, a pin fixing seat positioning device includes a variable diameter guide component, an angle measuring component and a straight-line distance measuring component; the variable diameter guide component is placed in the workpiece hinge hole 1, and can adjust its own diameter size according to the inner diameter size of the workpiece hinge hole 1, and is used for workpiece hinge holes 1 with different diameters; the angle measuring component is installed above the variable diameter guide component, and the two are fixed as a whole and can rotate 360 ​​degrees in the workpiece hinge hole 1, and the 0° position of the angle measuring component is used as the 0-point reference for the angle positioning of the pin fixing seat 18; the straight-line distance measuring component is installed on the angle measuring component, and can rotate 360 ​​degrees on the angle measuring component, rotate it to a preset pin fixing seat 18 installation angle, and adjust the length of the straight-line distance measuring component itself to the preset pin fixing seat 18 installation straight-line distance.

[0052] The above-mentioned variable diameter guide component is further described below.

[0053] like Figure 1 , Figure 2 , Figure 7 As shown, the variable diameter guide component includes a variable diameter guide mounting plate 7, a plurality of variable diameter telescopic arms 8 and a guide component; the variable diameter guide mounting plate 7 is an annular plate as a whole, and a plurality of slideways are arranged on its top surface at intervals along the circumferential direction, and each slideway faces the center of the variable diameter guide mounting plate 7; a variable diameter telescopic arm 8 is installed in a slideway, and a rolling component is installed on the side of the variable diameter telescopic arm 8 facing the inner wall of the workpiece hinge hole 1; the guide component is connected with the plurality of variable diameter telescopic arms 8, and the plurality of variable diameter telescopic arms 8 are driven to move linearly in their respective slideways at the same time through the guide component; when the plurality of variable diameter telescopic arms 8 move toward the center of the variable diameter guide mounting plate 7 at the same time, the diameter of the outer circular contour formed by the plurality of rolling components gradually decreases; when the plurality of variable diameter telescopic arms 8 move toward the inner wall of the workpiece hinge hole 1 at the same time, the diameter of the outer circular contour formed by the plurality of rolling components gradually increases.

[0054] Further solutions: Figure 6As shown, the variable diameter telescopic arm 8 is an L-shaped structure as a whole, the rolling component is a bull's eye bearing 9, the bull's eye bearing 9 is connected to the variable diameter telescopic arm 8 through a threaded hole, the slideway is a T-slot, and the bottom of the variable diameter telescopic arm 8 is provided with a T-shaped protrusion that cooperates with the T-slot. Under the restriction of the T-slot, the variable diameter telescopic arm 8 can only perform linear telescopic movement on the variable diameter guide mounting plate 7.

[0055] Further solutions: Figure 1 As shown, a plurality of countersunk holes I are provided on the variable diameter guide mounting plate 7 along the circumferential surface at intervals, and the plurality of countersunk holes I are arranged alternately with the plurality of slideways; a plurality of countersunk holes II corresponding to the countersunk holes I are provided on the angle measuring component; a support column 10 is fixed between each group of countersunk holes I and countersunk holes II by tightening the hexagon socket head screws 14 up and down, and the angle measuring component is lifted by the support of the plurality of support columns 10, so that the plurality of variable diameter telescopic arms 8 can move linearly on the variable diameter guide mounting plate 7.

[0056] A preferred solution is as follows: three slideways are provided on the variable diameter guide mounting plate 7, three countersunk holes Ⅰ are provided on the variable diameter guide mounting plate 7, and the three slideways and the three countersunk holes Ⅰ are arranged at an angle of 60 degrees.

[0057] Further solutions: Figure 1 As shown, the guide component includes a rod-shaped component 4 and a pressure arm 5; the rod-shaped component 4 is arranged on the variable diameter guide mounting plate 7, and the center lines of the two coincide with each other; the lower part of the rod-shaped component 4 is connected to a plurality of variable diameter telescopic arms 8, and the upper part of the rod-shaped component 4 passes through the angle measuring component; the pressure arm 5 is hinged to the upper part of the rod-shaped component 4 and forms a lever with the supporting component located on the angle measuring component, and the rod-shaped component 4 is driven to move up and down by lifting or pressing the pressure arm 5, thereby driving the plurality of variable diameter telescopic arms 8 to move linearly.

[0058] Further solutions: Figure 3 As shown, the rod-shaped component 4 is a conical structure, which consists of a cylinder in the upper part and a conical block in the lower part; a plurality of T-slots corresponding to the variable-diameter telescopic arm 8 are arranged at intervals on the outer circumferential surface of the conical block, and the variable-diameter telescopic arm 8 is provided with a T-shaped protrusion that cooperates with the T-slot, and the T-shaped protrusion and the T-slot are clearance-matched; the upper part of the cylinder is processed into a plane and has a radial through hole, the end of the pressure arm 5 is open and the side is opened, the flat part of the cylinder is inserted into the opening of the pressure arm 5, and is hinged together by a pin 15 and a cotter pin 16.

[0059] Preferred solution: The conical block is in the shape of a hexagonal pyramid, and the conical surface is 45°. A total of three T-slots are machined on two non-adjacent conical surfaces to serve as guides for the variable-diameter telescopic arm 8. The use of a 45° conical surface can increase the linear travel of the variable-diameter telescopic arm 8 and improve the compatibility of the device of the utility model. When the conical block moves, the three variable-diameter telescopic arms 8 can move inward or outward synchronously.

[0060] Further solutions: Figure 1 As shown, the pressure arm 5 is provided with an arc-shaped protrusion at the hinge with the rod-shaped component 4, and the arc-shaped protrusion contacts the top surface of the supporting component and is used as a fulcrum of the lever. The rotation of the arc-shaped protrusion on the top surface of the supporting component is converted into the up and down movement of the rod-shaped component 4 through external force.

[0061] Further solutions: Figure 1 As shown, a cylindrical helical compression spring 6 is installed between the rod-shaped component 4 and the supporting component on the angle measuring component. When the pressure arm 5 is not subjected to external force, the bull's eye bearings 9 of multiple variable-diameter telescopic arms 8 are pressed against the inner wall of the workpiece hinge hole 1 under the elastic force of the cylindrical helical compression spring 6.

[0062] The above-mentioned angle measuring component is further described below.

[0063] like Figure 1 , Figure 2 , Figure 4 As shown, the angle measuring component is an angle scale flange 2, on the edge of the upper plane of which a scale of 0~360° is arranged along the circumferential direction, and a reference pointing arrow structure is arranged at the 0° position, which serves as the 0-point reference when the pin shaft fixing seat 18 is positioned at the angle; a circular hole is arranged at the center of the angle scale flange 2, and an annular protrusion is extended upward around the periphery of the circular hole, and a guide nut 3 is connected to the annular protrusion through a thread, and the inner hole of the annular protrusion and the inner hole of the guide nut 3 together constitute the guide hole of the rod-shaped component 4 in the variable diameter guide component, and the guide nut 3 is also used as a supporting component of the pressure arm 5 in the variable diameter guide component.

[0064] The above-mentioned straight-line distance measuring component is further described below.

[0065] like Figure 1 , Figure 2 , Figure 5 As shown, the linear distance measuring component is an eccentric structure, including a linear fixed ruler 11 and a linear telescopic ruler 12 with a T-shaped structure; the linear fixed ruler 11 is composed of a collar and a long ruler with a 150-260 mm scale extending outward from the outer circumference of the collar, and a T-shaped slot of the same length is provided on the top surface of the long ruler along its length direction; the collar is sleeved on the annular protrusion of the angle scale flange 2, and a circle of grooves is provided on the outer circumference of the annular protrusion, and the retaining ring 17 is stuck in the groove to limit the axial movement of the linear fixed ruler 11; the linear telescopic ruler 12 includes a vertical part and a horizontal part, the length of the horizontal part is not less than the length of the long ruler, and the cross-section of the horizontal part is a T-shaped surface, which is inserted into the T-shaped slot of the linear fixed ruler 11, and the linear telescopic ruler 12 is moved until the vertical part reaches the target linear distance.

[0066] Further solutions: Figure 1 As shown, a convex block is provided on the bottom surface of the linear fixed ruler 11 at the radial circumference close to the angle scale flange 2, and a knurled high head screw 13 is installed on the convex block. The knurled high head screw 13 is rotated to press the front end of the knurled high head screw against the radial circumference of the angle scale flange 2, thereby limiting the rotational freedom of the linear fixed ruler 11; a knurled high head screw 13 is installed at the end of the horizontal part of the linear telescopic ruler 12 away from the vertical part. The knurled high head screw 13 is rotated to press the front end of the knurled high head screw against the linear fixed ruler 11, thereby limiting the telescopic freedom of the linear telescopic ruler 12.

[0067] A further solution is as follows: the variable diameter guide mounting plate 7 is evenly provided with three T-slots for guiding the variable diameter telescopic arm 8. The structure can be welded or formed as a whole plate, and is subjected to quenching and tempering treatment: the hardness is 250~280HBW, and then fine machining is performed to ensure accuracy; the conical block is in the shape of a hexagonal pyramid, and T-slots are machined on three non-adjacent inclined surfaces thereof as guides for the variable diameter telescopic arm 8. The material is subjected to quenching and tempering treatment: the hardness is 250~280HBW, and then fine machining is performed to ensure accuracy; the overall structure is assembled, and the upper and lower parts of the overall structure are connected together with three evenly distributed cylinders and screws to ensure structural stability and a lightweight device.

[0068] The following is a usage process of the above-mentioned pin fixing seat positioning device:

[0069] like Figure 2 As shown, the pin shaft fixing seat positioning device is sleeved in the hinge point hole of the workpiece 1, and the pressure arm 5 rotates downward along the arc line of the outer circumference of the pressure arm 5 under the action of external force and the limitation of the pin shaft 15, and the rod-shaped component 4 moves upward under the limitation of the guide nut 3 and the angle scale flange 2, so that the variable diameter telescopic arm 8 connected to the tapered block through the T-slot structure moves toward the center, and can only move in a straight line along the T-slot of the variable diameter guide mounting plate 7 under the limitation of the variable diameter guide mounting plate 7, the outer diameter of the entire device becomes smaller, and the pressure arm 5 is restored to its original state, that is, under the action of external force, the pressure arm 5 rotates upward, the rod-shaped component 4 moves upward, the variable diameter telescopic arm 8 extends outward and is supported inside the workpiece hinge hole 1, the angle scale flange 2 is rotated, and the bull's eye bearing 9 rolls in the workpiece hinge hole 1 under the action of external force until the angle reference adjustment is completed. The application of this structure solves the problem that the device cannot be installed in hinge holes 1 of different diameters.

[0070] The linear fixed ruler 11 is sleeved on the upper cylinder of the angle scale flange 2. There is a groove on the upper cylinder of the angle scale flange 2. The retaining ring 17 is installed in the groove to limit the movement of the linear fixed ruler 11 to the upper free end. According to the angle of the workpiece pin shaft fixing seat drawing, the linear fixed ruler 11 is adjusted to rotate along the central axis of the angle scale flange 2 until the target angle is reached, and the knurled high head screw 13 is tightened to limit the freedom of the linear fixed ruler 11. According to the linear distance of the workpiece pin shaft fixing seat drawing, the linear telescopic ruler 12 is adjusted to move linearly along the T-slot of the linear fixed ruler 11 until the target linear distance is reached, and the knurled high head screw 13 is tightened to limit the freedom of the linear telescopic ruler 12. This structure can solve the problem of different linear distances of various workpiece pin shaft fixing seats.

[0071] As can be seen from the above, the utility model realizes the following functions:

[0072] 1): The part that realizes diameter change and is fixed on the workpiece is composed of a tapered block, a diameter-changing telescopic arm, a pressure arm mechanism, etc. The maximum diameter is in the free state. When in use, the tapered block is driven by the pressure arm to move linearly to achieve rapid adjustment of the diameter size, solving the problem that the hinge point hole has various diameters and needs multiple adjustments, and the hinge point hole cannot be used as a reference.

[0073] 2): Two bull's eye bearings are installed on the outside of each variable-diameter telescopic arm, which solves the problem of being unable to fine-tune due to friction, blockage, collision and other problems after the device is installed in the hinge hole.

[0074] 3): The surface of the angle scale flange is laser marked with a 0~360° scale, and a reference pointing arrow structure is set at the 0° position as the 0-point reference for angle positioning of the fixed seat.

[0075] 4): The surface of the linear fixed scale of the linear telescopic arm is laser marked with a scale of 150~260mm, which can achieve a linear distance travel adjustment of minimum 150mm and maximum 260mm.

[0076] 5): The linear fixed scale structure of the linear telescopic arm part is an eccentric structure, which is the basis for adjusting the digital side angle. The purpose of this setting is to achieve one-handed operation and improve the usability of the device.

[0077] 6): The linear telescopic ruler part of the linear telescopic arm mechanism is an eccentric structure. The positioning 0 point is set at an eccentric position to achieve the purpose of using the center of the fixed seat as the reference during positioning.

[0078] 7): The overall structure is assembled, and the upper and lower parts of the overall structure are connected together with three evenly distributed cylinders and screws to ensure structural stability and lightweight device.

[0079] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0080] In addition, those skilled in the art will understand that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments also means being within the scope of protection of the present utility model and forming different embodiments. For example, in the above embodiments, those skilled in the art can use them in combination according to the known technical solutions and the technical problems to be solved by the present application.

[0081] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model has been disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this patent can make some changes or modify the technical content suggested above into an equivalent embodiment with equivalent changes without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of the solution of the utility model.

Claims

1. A pin fixing seat positioning device, characterized in that: include: The variable diameter guide component is placed in the hinge hole of the workpiece and can adjust its own diameter size according to the inner diameter size of the hinge hole of the workpiece, and is used for workpiece hinge holes of different diameters; An angle measuring component is installed above the variable diameter guide component. After the two are fixed as a whole, they can rotate 360 ​​degrees in the workpiece hinge hole, and the 0° position of the angle measuring component is used as the 0 point reference when the pin fixing seat is positioned at the angle; The straight-line distance measuring component is installed on the angle measuring component and can rotate 360 ​​degrees on the angle measuring component to a preset pin fixing seat installation angle, and adjust the length of the straight-line distance measuring component itself to a preset pin fixing seat installation straight-line distance.

2. A pin fixing seat positioning device according to claim 1, characterized in that: The variable diameter guide component comprises: The variable diameter guide mounting plate is an annular plate as a whole, and a plurality of slideways are arranged at intervals along the circumference of the top surface thereof, and each slideway faces the center of the variable diameter guide mounting plate; A plurality of variable diameter telescopic arms, one variable diameter telescopic arm is installed in one slideway, and a rolling component is installed on the side of the variable diameter telescopic arm facing the inner wall of the workpiece hinge hole; The guide component is connected to the multiple variable-diameter telescopic arms, and the multiple variable-diameter telescopic arms are simultaneously driven by the guide component to move linearly in their respective slideways; when the multiple variable-diameter telescopic arms simultaneously move toward the center of the variable-diameter guide mounting plate, the diameter of the outer circular contour formed by the multiple rolling components gradually decreases; when the multiple variable-diameter telescopic arms simultaneously move toward the inner wall of the workpiece hinge hole, the diameter of the outer circular contour formed by the multiple rolling components gradually increases.

3. A pin fixing seat positioning device according to claim 2, characterized in that: The variable diameter guide mounting plate is provided with a plurality of countersunk holes I at intervals along the circumference, and the plurality of countersunk holes I are arranged alternately with the plurality of slideways; the angle measuring component is provided with a plurality of countersunk holes II corresponding to the countersunk holes I; A support column is fixed between each group of countersunk holes I and II by tightening screws up and down. The angle measuring component is lifted by the support of multiple support columns, so that multiple variable diameter telescopic arms can move linearly on the variable diameter guide mounting plate.

4. A pin fixing seat positioning device according to claim 2, characterized in that: The guide component comprises: A rod-shaped component is arranged on the variable diameter guide mounting plate, and the center lines of the two coincide with each other; the lower part of the rod-shaped component is connected to a plurality of variable diameter telescopic arms, and the upper part of the rod-shaped component passes through the angle measuring component; The pressure arm is hinged to the upper part of the rod-shaped component and forms a lever with the support component located on the angle measuring component. By lifting or pressing the pressure arm, the rod-shaped component is driven to move up and down, thereby driving multiple variable-diameter telescopic arms to move linearly.

5. A pin fixing seat positioning device according to claim 4, characterized in that: The rod-shaped component is a conical structure, which is composed of a cylinder at the upper part and a conical block at the lower part; The outer peripheral surface of the conical block is provided with a plurality of T-shaped slots corresponding to the variable diameter telescopic arms at intervals, and the variable diameter telescopic arms are provided with T-shaped protrusions matched with the T-shaped slots, and the T-shaped protrusions are clearance-matched with the T-shaped slots; The top end of the cylinder is provided with a radial through hole, which is hinged with the pressure arm through a pin shaft and a cotter pin.

6. A pin fixing seat positioning device according to claim 4, characterized in that: The pressure arm is provided with an arc-shaped protrusion at the hinge with the rod-shaped component. The arc-shaped protrusion contacts the top surface of the supporting component and is used as a fulcrum of the lever. The rotation of the arc-shaped protrusion on the top surface of the supporting component is converted into the up and down movement of the rod-shaped component through external force.

7. A pin fixing seat positioning device according to claim 4, characterized in that: At least one elastic component is installed between the rod-shaped component and the supporting component on the angle measuring component. When the pressing arm is not subjected to external force, the rolling components of the multiple variable-diameter telescopic arms are pressed against the inner wall of the workpiece hinge hole under the elastic force of the at least one elastic component.

8. The pin fixing seat positioning device according to claim 1, characterized in that: The angle measuring component is an angle scale flange, on the edge of the upper plane of which a scale of 0 to 360 degrees is arranged along the circumference, and a reference pointing arrow structure is arranged at the 0 degree position as the 0 point reference when the angle of the pin fixing seat is positioned; A circular hole is provided at the center of the angle scale flange, and an annular protrusion is extended upward around the periphery of the circular hole. A guide nut is threadedly connected to the annular protrusion. The inner hole of the annular protrusion and the inner hole of the guide nut together constitute the guide hole of the rod-shaped component in the variable diameter guide component, and the guide nut is also used as a supporting component of the pressure arm in the variable diameter guide component.

9. A pin fixing seat positioning device according to claim 8, characterized in that: The straight-line distance measuring component is an eccentric structure, comprising: The linear fixed ruler is composed of a collar and a long ruler with a scale extending outward from the outer circumference of the collar, and the top surface of the long ruler is provided with a T-shaped groove along its length direction; the collar is sleeved on the annular protrusion of the angle scale flange, and the outer circumference of the annular protrusion is provided with a circle of grooves, and the retaining ring is stuck in the groove to limit the axial movement of the linear fixed ruler; A linear telescopic ruler with a T-shaped structure comprises a vertical portion and a horizontal portion, wherein the length of the horizontal portion is not less than the length of the long ruler, and the cross-section of the horizontal portion is a T-shaped surface, which is inserted into the T-shaped slot of the linear fixed ruler, and the linear telescopic ruler is moved until the vertical portion reaches the target linear distance.

10. A pin fixing seat positioning device according to claim 9, characterized in that: The bottom surface of the linear fixed ruler is provided with a convex block near the radial circumference of the angle scale flange, and a fastening bolt I is installed on the convex block. The fastening bolt I is rotated so that the front end thereof is pressed against the radial circumference of the angle scale flange, thereby limiting the rotational freedom of the linear fixed ruler; A fastening bolt II is installed at the end of the horizontal part of the linear telescopic ruler away from the vertical part. The fastening bolt II is rotated to press its front end against the linear fixed ruler, thereby limiting the telescopic freedom of the linear telescopic ruler.

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