Bushing roundness measuring device

Abstract

The utility model relates to a bush roundness measuring device, and relates to the technical field of part roundness detection. A lower die is fixed to the workbench, an upper die is connected to the workbench through a support, the upper die is located over the lower die, an air cylinder is arranged on the support, the output end of the air cylinder is connected with the upper die, the air cylinder is used for driving the upper die to move close to or away from the lower die in the vertical direction, and the upper die can abut against the lower die. The lining can be vertically placed between the upper die and the lower die, a scale is arranged on the upper die, an abutting rod is arranged on the scale, a positioning rod is fixed to the workbench, the bottom end of the abutting rod can abut against the positioning rod, and the abutting rod vertically moves to be used for changing the angle of a pointer on the scale. The bush roundness measuring device has the advantage of being high in bush roundness measuring efficiency.

Description

Technical Field

[0001] The present application relates to the field of part roundness detection, and in particular to a bushing roundness measuring device. Background Art

[0002] The bushing is a matching part used outside the mechanical parts to achieve the functions of sealing and wear protection. Since the bushing structure is mostly composed of an inner sleeve, a middle rubber block and an outer sleeve, the outer diameter of the outer sleeve is mostly completed through a reduction process during the bushing manufacturing process. Due to the structure of the rubber layer between the inner and outer sleeves and the flexibility and elasticity of the rubber layer itself, the outer diameter of the sleeve is out of round after production, so it is necessary to test the roundness of the produced bushing.

[0003] In the related technology, a Chinese patent with authorization announcement number CN209763982U discloses a fast and accurate measurement fixture for the roundness of the outer circle of a bushing, comprising a base plate, on which a dial indicator calibration block assembly and a base block are installed, the dial indicator calibration block assembly is an L-shaped plate structure, the base block is a square structure, a fixed pin is installed in the middle of the base block, dial indicator detection blocks are respectively installed at the ends of the horizontal section of the dial indicator calibration block assembly and in the four directions of the base block, the upper ends of the dial indicator detection blocks are respectively provided with detection holes for inserting the dial indicator, and after the detection end of the dial indicator is inserted into the detection hole, its detection end contacts and cooperates with the inner side surface of the vertical section of the dial indicator calibration block assembly and the outer circular surface of the bushing to be inspected.

[0004] When in use, place the bushing to be tested on the flat surface of the base block, insert the locating pin to position the bushing, take out the dial indicator after the bushing is positioned, and use the calibration block on the inspection fixture to calibrate the calibration value, and then insert it into the inspection block holes around the base block to detect the circumferential size value of the bushing. The bushing can be inserted for testing in each direction separately, or the bushing can be manually rotated to measure the value in the required circumferential direction.

[0005] The above operation requires adjusting the position of the bushing multiple times, or adjusting the position of the dial indicator multiple times and reinstalling it to measure different positions of the bushing, which leads to inconvenience in operation and low efficiency in measuring the roundness of the bushing, so it needs to be improved. Utility Model Content

[0006] In order to improve the problem of low efficiency in measuring the roundness of a bushing, the present application provides a bushing roundness measuring device.

[0007] The present application provides a bushing roundness measuring device that adopts the following technical solution:

[0008] A bushing roundness measuring device is used to measure the roundness of the bushing, comprising a workbench, a lower die is fixed on the workbench, an upper die is connected to the workbench via a bracket, the upper die is located directly above the lower die, a cylinder is provided on the bracket, the output end of the cylinder is connected to the upper die, the cylinder is used to drive the upper die to move in a vertical direction toward or away from the lower die, the upper die can abut against the lower die, the bushing can be vertically placed between the upper die and the lower die, a gauge is provided on the upper die, an abutment rod is provided on the gauge, a positioning rod is fixed on the workbench, the bottom end of the abutment rod can abut against the positioning rod, and the vertical movement of the abutment rod is used to change the angle of the pointer on the gauge.

[0009] By adopting the above technical solution, in the initial state, the cylinder drives the upper mold to be suspended above the lower mold, that is, the upper part of the lower mold is in an open state. When in use, first place the standard bushing on the lower mold. At this time, the lower half of the bushing is supported, and then start the cylinder to drive the upper mold to move in the direction of the lower mold, so that the bottom end of the abutment rod abuts against the top of the positioning rod, and the connecting plate continues to move until the upper mold abuts against the bushing. During this process, the positioning rod limits the abutment rod from continuing to move downward, so that the abutment rod moves relatively upward, thereby driving the pointer of the scale to rotate, and the reading is recorded at this time. This reading is the standard data.

[0010] Then, when measuring the bushing, place the bushing to be measured vertically on the lower die, repeat the above steps until the upper die abuts against the top of the bushing, observe the value on the measuring scale, and compare the value with the standard value. If the values ​​are equal, the measured bushing meets the standard, and if the values ​​are not equal, the bushing is out of round, and the difference between the two values ​​is the out-of-round value, which reduces the deviation caused by manual measurement, and also reduces the steps of multiple measurements, thereby improving the efficiency of bushing roundness testing.

[0011] Optionally, the upper mold is fixed with a connecting plate, which is fixed to the output shaft of the cylinder. A sleeve is provided on the connecting plate, and the sleeve is vertically arranged. The abutment rod is inserted in the sleeve and can move in the sleeve, and the bottom end of the abutment rod extends out of the sleeve.

[0012] By adopting the above technical solution, when the cylinder drives the connecting plate to move downward and the bottom end of the abutment rod abuts on the positioning rod, the connecting plate continues to move, causing the abutment rod to move in the sleeve. The inner wall of the sleeve abuts against the side wall of the abutment rod, which limits and guides the abutment rod, increases the stability of the movement of the abutment rod, thereby increasing the accuracy of driving the pointer on the scale to rotate, making it less likely to deviate, and thereby improving the accuracy of measuring the roundness of the bushing.

[0013] Optionally, a positioning hole is provided on the top end of the positioning rod, and the bottom end of the abutting rod can be inserted into the positioning hole.

[0014] By adopting the above technical solution, when the abutment rod abuts the positioning rod, the bottom end of the abutment rod is inserted into the positioning hole, and the inner wall of the positioning hole abuts against the side wall of the abutment rod, thereby increasing the contact area between the abutment rod and the positioning rod and playing a limiting role at the same time, limiting the abutment rod from sliding on the top wall of the positioning rod, thereby making the abutment rod less likely to tilt, increasing the stability of the abutment rod structure, and thus increasing the accuracy of the abutment rod driving the gauge pointer to rotate.

[0015] Optionally, a guide rod is fixed on the connecting plate, the guide rod is vertically arranged, a guide hole is opened on the workbench, the guide rod is inserted into the guide hole, and can move in the guide hole along the vertical direction.

[0016] By adopting the above technical solution, when the cylinder drives the connecting plate to move with the upper mold, the guide rod moves in the guide hole, and the inner wall of the guide hole abuts against the side wall of the guide rod, which plays a role of limiting the guide, so that the guide rod moves in the vertical direction, that is, the moving trajectory of the connecting plate is constant, so that the upper mold is always located directly above the lower mold, thereby increasing the stability of the upper mold after moving and fitting to the upper half of the bushing.

[0017] Optionally, a receiving groove is provided on the inner wall of the guide hole, an oil-soaked sponge is inserted into the receiving groove, and the oil-soaked sponge abuts against the side wall of the guide rod.

[0018] By adopting the above technical solution, when the guide rod moves in the guide hole, the oil-soaked sponge slides relatively on the side wall of the guide rod, so that the lubricating oil seeps onto the guide rod to play a lubricating role, facilitating the movement of the guide rod, thereby facilitating the connecting plate to drive the upper mold closer to or away from the lower mold.

[0019] Optionally, a storage rod is fixed on the workbench, the storage rod is vertically arranged, and the bushing can be sleeved on the storage rod.

[0020] By adopting the above technical solution, the bushing can be sleeved on the storage rod from the top end of the storage rod. When measuring the bushing, it is convenient to temporarily store the bushing standard parts used initially, reducing the possibility of confusion between the marked parts and other bushings to be measured.

[0021] Optionally, a fault-tolerant groove is provided on the side wall of the storage rod in the vertical direction.

[0022] By adopting the above technical solution, the fault-tolerant groove makes the side wall of the storage rod incomplete, so that the storage rod does not completely fit the inner wall of the bushing, that is, there is a gap between the inner wall of the bushing and the storage rod, so that the bushing does not have to be in a horizontal state to move on the storage rod, which makes it easy for the bushing to move on the storage rod, thereby facilitating the removal of the bushing.

[0023] Optionally, a storage seat is coaxially sleeved on the storage rod, the storage seat is located at the bottom end of the storage rod and fixed to the storage rod, and the diameter of the storage seat is smaller than the diameter of the bushing.

[0024] By adopting the above technical solution, when the bushing is installed on the storage rod, the bushing moves down along the storage rod until it abuts against the storage seat. At this time, the storage seat plays a supporting role, so that there is a gap between the bushing and the workbench, and the diameter of the storage seat is smaller than the diameter of the bushing, so that part of the bushing is suspended above the workbench, which is convenient for people to take and easy to operate.

[0025] In summary, the present application includes at least one of the following beneficial effects:

[0026] 1. When in use, place the bushing to be measured vertically on the lower die, then start the cylinder to drive the upper die to move in the direction of the lower die, so that the bottom end of the abutment rod abuts against the top of the positioning rod, and the connecting plate continues to move until the upper die abuts against the bushing. During this process, the positioning rod restricts the abutment rod from continuing to move downward, so that the abutment rod moves upward relatively, thereby driving the pointer of the gauge to rotate. At this time, record the reading and compare it with the data obtained when measuring the standard part, so as to determine whether the roundness of the bushing to be measured meets the standard;

[0027] 2. When the cylinder drives the connecting plate to move downward and the bottom end of the abutment rod abuts against the positioning rod, the connecting plate continues to move, causing the abutment rod to move in the sleeve. The inner wall of the sleeve abuts against the side wall of the abutment rod, which limits and guides the abutment rod, increases the stability of the movement of the abutment rod, and thus increases the accuracy of driving the pointer on the scale to rotate, making it less likely to deviate, thereby improving the accuracy of measuring the roundness of the bushing. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of a bushing roundness measuring device according to an embodiment of the present application;

[0029] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0030] Figure 3 This is a structural cross-sectional view of a bushing roundness measuring device according to an embodiment of the present application.

[0031] In the figure: 10, workbench; 11, lower die; 12, guide hole; 13, receiving groove; 14, positioning rod; 141, positioning hole; 15, storage rod; 151, fault-tolerant groove; 152, storage seat; 20, bracket; 30, cylinder; 40, connecting plate; 41, upper die; 42, guide rod; 43, mounting plate; 44, sleeve; 50, gauge; 51, abutment rod; 60, oil-soaked sponge. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-3 This application is described in further detail.

[0033] The present application embodiment discloses a bushing roundness measuring device. Figure 1 The bushing roundness measuring device includes a workbench 10, a lower die 11 is fixed on the top wall of the workbench 10, a bracket 20 is welded on the workbench 10, a cylinder 30 is installed on the bracket 20 by bolts, the tree end of the cylinder 30 is vertically downward, and a connecting plate 40 is fixed, the connecting plate 40 is located above the lower die 11, an upper die 41 is fixed on the connecting plate 40, the bottom wall of the upper die 41 and the top wall of the lower die 11 are both provided with arc grooves, the cylinder 30 can drive the connecting plate 40 to move up and down, drive the upper die 41 to move to abut against the lower die 11, and realize the clamping of the upper die and the lower die 11, at this time, the two arc grooves form a complete circular hole.

[0034] A mounting plate 43 is connected to the side wall of the connecting plate 40 by bolts, and a sleeve 44 is passed through the mounting plate 43, and the sleeve 44 is fixed to the mounting plate 43 by bolts. The sleeve 44 is arranged vertically, and a gauge 50 is fixed to the top of the sleeve 44. An abutment rod 51 is inserted into the sleeve 44, and the abutment rod 51 is connected to the gauge 50. The bottom end of the abutment rod 51 extends out of the sleeve 44, and the abutment rod 51 can move up and down in the sleeve 44, thereby driving the pointer on the gauge 50 to rotate. A positioning rod 14 is fixed to the top wall of the workbench 10, and the positioning rod 14 is arranged vertically. A positioning hole 141 is opened on the top wall of the positioning rod 14. When the cylinder 30 drives the connecting plate 40 to move, so that the abutment rod 51 moves downward, the tip of the bottom of the abutment rod 51 can be aligned with the positioning hole 141 and inserted into the positioning hole 141.

[0035] In the initial state, the cylinder 30 drives the upper die 41 to suspend above the lower die 11, that is, the upper part of the lower die 11 is in an open state. When in use, first place a standard bushing on the lower die 11, at which time the lower half of the bushing is supported, and then start the cylinder 30 to drive the upper die 41 to move in the direction of the lower die 11, so that the bottom end of the abutment rod 51 is inserted into the positioning hole 141, and the positioning hole 141 limits the displacement of the abutment rod 51. Then the connecting plate 40 continues to move until the upper die 41 abuts against the bushing, so that the upper half of the bushing is squeezed and restricted. In this process, the positioning rod 14 limits the abutment rod 51 from continuing to move downward, so that the abutment rod 51 moves relatively upward in the sleeve 44, and the sleeve 44 limits the movement direction of the abutment rod 51, thereby driving the pointer of the gauge 50 to rotate, and the reading is recorded at this time, which is the standard data.

[0036] Then, when inspecting the bushing to be measured, the bushing to be measured is placed vertically on the lower die 11, and the above steps are repeated until the upper die 41 abuts against the top of the bushing. The value on the gauge 50 is observed and compared with the standard value. If the values ​​are equal, the measured bushing meets the standard, and if the values ​​are not equal, the bushing is out of round, and the difference between the two values ​​is the out-of-round value, which reduces the deviation caused by manual measurement, reduces the steps of multiple measurements, and improves the efficiency of bushing roundness testing.

[0037] Reference Figure 3 In order to increase the stability of the movement of the connecting plate 40, a guide rod 42 is fixed on the connecting plate 40, and the guide rod 42 is vertically arranged. A guide hole 12 is provided on the workbench 10, and the guide rod 42 is inserted into the guide hole 12 and can move in the guide hole 12 along the vertical direction. A receiving groove 13 is provided on the inner wall of the guide hole 12, and an oil-soaked sponge 60 is inserted into the receiving groove 13, and the oil-soaked sponge 60 abuts against the side wall of the guide rod 42.

[0038] When the cylinder 30 drives the connecting plate 40 to move with the upper die 41, the guide rod 42 moves in the guide hole 12, so that the oil-soaked sponge 60 slides relatively on the side wall of the guide rod 42, thereby infiltrating the lubricating oil onto the guide rod 42, playing a lubricating role and facilitating the movement of the guide rod 42. The inner wall of the guide hole 12 abuts against the side wall of the guide rod 42, playing a role of limiting the guide, so that the guide rod 42 moves in the vertical direction, that is, the moving track of the connecting plate 40 is fixed, so that the upper die 41 is always located directly above the lower die 11, thereby increasing the stability of the upper die 41 fitting on the upper half of the bushing after moving.

[0039] Reference Figure 1 and Figure 2 A storage seat 152 is fixed on the workbench 10, and a storage rod 15 is fixed on the storage seat. The storage rod 15 is vertically arranged and coaxial with the storage seat, wherein the diameter of the storage seat is smaller than the diameter of the bushing. A fault tolerance groove 151 is cut on the side wall of the storage rod 15 in the vertical direction, so that the storage rod 15 is not a complete cylinder.

[0040] The bushing can be sleeved on the storage rod 15 from the top of the storage rod 15. At this time, the bushing will move down along the storage rod 15 until it abuts against the storage seat 152. At this time, the storage seat 152 plays a supporting role, so that there is a gap between the bushing and the workbench 10, and the diameter of the storage seat is smaller than the diameter of the bushing, so that part of the bushing is suspended above the workbench 10, which is convenient for manual picking. When measuring the bushing, it is convenient to temporarily store the bushing standard parts used at the beginning, reducing the possibility of confusion between the marked parts and other bushings to be measured. The fault-tolerant groove 151 makes the storage rod 15 not completely fit the inner wall of the bushing, that is, there is a gap between the inner wall of the bushing and the storage rod 15, so that the bushing does not have to be in a horizontal state to move on the storage rod 15, which makes it easy for the bushing to move on the storage rod 15, thereby facilitating the removal of the bushing.

[0041] The implementation principle of a bushing roundness measuring device in an embodiment of the present application is as follows: in the initial state, the cylinder 30 drives the upper mold 41 to suspend above the lower mold 11, that is, the upper part of the lower mold 11 is in an open state. When in use, a standard bushing is first placed on the lower mold 11. At this time, the lower half of the bushing is supported, and then the cylinder 30 is started to drive the upper mold 41 to move in the direction of the lower mold 11, so that the bottom end of the abutment rod 51 abuts against the top of the positioning rod 14, and the connecting plate 40 continues to move until the upper mold 41 abuts against the bushing. During this process, the positioning rod 14 limits the abutment rod 51 from continuing to move downward, so that the abutment rod 51 moves relatively upward, thereby driving the pointer of the gauge 50 to rotate, and the reading is recorded at this time. This reading is the standard data.

[0042] Then, when measuring the bushing, the bushing to be measured is placed vertically on the lower mold 11, and the above steps are repeated until the upper mold 41 abuts against the top of the bushing, the value on the measuring scale 50 is observed, and the value is compared with the standard value. If the values ​​are equal, the measured bushing meets the standard, and if the values ​​are not equal, the bushing is out of round, and the difference between the two values ​​is the out-of-round value, which reduces the deviation caused by manual measurement, and also reduces the steps of multiple measurements, thereby improving the efficiency of bushing roundness testing.

[0043] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A bushing roundness measuring device, used to measure the roundness of a bushing, characterized in that: The invention comprises a workbench (10), a lower die (11) is fixed on the workbench (10), an upper die (41) is connected to the workbench (10) via a bracket (20), the upper die (41) is located directly above the lower die (11), a cylinder (30) is provided on the bracket (20), the output end of the cylinder (30) is connected to the upper die (41), the cylinder (30) is used to drive the upper die (41) to move in a direction close to or away from the lower die (11) in a vertical direction, the upper die (41) can abut against the lower die (11), a bushing can be vertically placed between the upper die (41) and the lower die, a gauge (50) is provided on the upper die (41), and the gauge ( A contact rod (51) is provided on the measuring scale (50), a positioning rod (14) is fixed on the working table (10), the bottom end of the contact rod (51) can contact the positioning rod (14), and the contact rod (51) is vertically moved to change the angle of the pointer on the measuring scale (50).

2. The bushing roundness measuring device according to claim 1, characterized in that: The upper mold (41) is fixed with a connecting plate (40), the connecting plate (40) is fixed with the output shaft of the cylinder (30), a sleeve (44) is provided on the connecting plate (40), the sleeve (44) is vertically arranged, the abutment rod (51) is inserted in the sleeve (44) and can move in the sleeve (44), and the bottom end of the abutment rod (51) extends out of the sleeve (44).

3. The bushing roundness measuring device according to claim 2, characterized in that: A positioning hole (141) is provided on the top end of the positioning rod (14), and the bottom end of the abutment rod (51) can be inserted into the positioning hole (141).

4. The bushing roundness measuring device according to claim 2, characterized in that: A guide rod (42) is fixed on the connecting plate (40), and the guide rod (42) is arranged vertically. A guide hole (12) is opened on the workbench (10), and the guide rod (42) is inserted into the guide hole (12) and can move in the guide hole (12) along the vertical direction.

5. The bushing roundness measuring device according to claim 4, characterized in that: An accommodating groove (13) is provided on the inner wall of the guide hole (12), an oil-soaked sponge (60) is inserted into the accommodating groove (13), and the oil-soaked sponge (60) abuts against the side wall of the guide rod (42).

6. The bushing roundness measuring device according to claim 1, characterized in that: A storage rod (15) is fixed on the workbench (10); the storage rod (15) is arranged vertically, and a bushing can be sleeved on the storage rod (15).

7. The bushing roundness measuring device according to claim 6, characterized in that: A fault tolerance groove (151) is provided on the side wall of the storage rod (15) in the vertical direction.

8. The bushing roundness measuring device according to claim 6, characterized in that: A storage seat (152) is coaxially sleeved on the storage rod (15), the storage seat (152) is located at the bottom end of the storage rod (15) and is fixed to the storage rod (15), and the diameter of the storage seat is smaller than the diameter of the bushing.

Images