A quick fixture for eccentric shaft detection

Abstract

The present invention discloses a quick fixture for eccentric shaft detection, which includes a base, an intermediate seat, a gland, a tooling drive, a connecting rod mechanism, and a bushing. The base is provided with quick installation holes, and through cooperation with preset connecting parts on the workbench surface, the overall quick disassembly and assembly of the fixture can be achieved. The bushing can be quickly inserted and removed for replacement. By rotating the camshaft in the tooling drive to drive the opening and closing of the connecting rod mechanism, the opening and closing of the connecting rod mechanism drive the opening and closing of the bushing, thereby clamping or loosening the eccentric shaft. The quick fixture for eccentric shaft detection described in the present invention has a reasonable structure, and has the advantages of convenient use, low clamping error, high clamping efficiency, etc., effectively solving the problem of low clamping accuracy of traditional detection fixtures.

Description

Technical Field

[0001] The present invention relates to the field of RV reducers, and particularly to a quick fixture for detecting eccentric shafts. Background Art

[0002] The RV reducer is a new type of transmission developed on the basis of cycloid pinwheel transmission. Its main characteristics are large transmission ratio, large load-bearing capacity, high stiffness, high motion accuracy, high transmission efficiency, small backlash, smaller volume and larger overload capacity than simple cycloid pinwheel planetary transmission, and large stiffness of the output shaft. Therefore, it has been widely regarded at home and abroad.

[0003] The eccentric shaft is a key component in the RV reducer, which undertakes the function of transmitting the rotation of the planetary gear to the swing of the cycloid wheel. To ensure the stability of motion transmission, the eccentric shaft requires high precision. When using traditional detection means, the eccentric shaft is thread-fastened by a manual clamping fixture. Each time of loading and unloading, it is necessary to manually tighten the screws to clamp the parts. The clamping force is not uniform, the clamping efficiency is low, which is not conducive to mass production. The traditional fixture has strong specificity, and different fixtures need to be replaced for different eccentric shafts. The traditional fixture only performs radial positioning, and the clamping of the eccentric shaft will be affected by the tilting force, thus affecting the detection accuracy. Moreover, the bolt is tightened by adjusting the tightness of the bolt by hand feeling when clamping the workpiece, and there is a clamping error for each part during detection. Therefore, it is necessary to invent a fixture for detecting eccentric shafts with low repeated clamping error and high clamping efficiency. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: in order to overcome the above problems, a quick fixture for detecting eccentric shafts is provided. Its structure is reasonable, and it has the advantages of simple structure, convenient use, low clamping error, high clamping efficiency, etc., effectively solving the problem of low clamping accuracy of traditional detection fixtures.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a quick fixture for detecting eccentric shafts, including a base, an intermediate seat, a gland, a tooling drive, a link mechanism, and a bushing. Both the base and the intermediate seat are hollow structures with upward openings. The bottom of the intermediate seat is buckled with the opening end of the base and fixedly connected to each other by bolts. The gland is buckled with the opening end of the intermediate seat. Four support sleeves are uniformly fixed at the bottom of the inner cavity of the intermediate seat. Bolts pass through the support sleeves from the bottom of the intermediate seat upward and are thread-locked with the gland.

[0006] The tooling drive includes a camshaft, an upper sleeve, and a lower sleeve. The lower sleeve is sleeved into the through hole at the bottom of the intermediate seat, the upper sleeve is sleeved into the through hole on the gland, the lower end of the camshaft is slidably sleeved into the lower sleeve, and the upper end of the camshaft is slidably sleeved into the upper sleeve, so that the camshaft is axially limited.

[0007] The described linkage mechanism includes an upper left connecting rod, a lower left connecting rod, an upper right connecting rod, a lower right connecting rod, and a tension spring. The lower left connecting rod and the lower right connecting rod are symmetrically arranged in the inner cavity of the middle seat. The upper left connecting rod and the upper right connecting rod are symmetrically arranged above the gland, and the upper left connecting rod and the lower left connecting rod, and the upper right connecting rod and the lower right connecting rod are respectively fixed to each other by connecting rod bolts.

[0008] One end of the lower left connecting rod and the lower right connecting rod close to the tooling drive is respectively in pressing connection with the cam surface of the camshaft. The other ends of the lower left connecting rod and the lower right connecting rod are respectively rotatably connected to two connecting rod pins, and the two connecting rod pins are respectively fixedly connected to the bottom of the inner cavity of the middle seat. Connecting rods are respectively fixedly arranged between the two ends of the lower left connecting rod and the lower right connecting rod. The two ends of the tension spring are respectively sleeved on the connecting rods on the lower left connecting rod and the lower right connecting rod.

[0009] The described jacket is arranged above the gland. One end of the jacket close to the tooling drive is provided with a camshaft hole for the upper end of the camshaft to pass through. The other end of the jacket away from the tooling drive is provided with a positioning hole. A positioning pin is fixedly arranged at the bottom of the inner cavity of the middle seat, and the positioning pin passes upward through the gland and into the positioning hole. The middle of the jacket is provided with a jacket through hole. The jacket is provided with a plurality of first through grooves radially around the jacket through hole, and a second through groove is provided through the center of the jacket through hole and the camshaft hole. The upper left connecting rod and the upper right connecting rod are respectively closely attached to both sides of the end of the jacket with the camshaft hole.

[0010] Further, the base is provided with a base through hole for the center point to pass through which is installed on the workbench.

[0011] Further, the bottom of the base is provided with quick installation holes which are arranged around the base through hole, and the quick installation holes have an arc structure, and the fixture can be quickly loaded and unloaded from the workbench surface by rotating.

[0012] Further, the connecting rod bolt passes through the gland. A through hole is provided on the gland along the movement track of the linkage mechanism, and the connecting rod bolt moves in this through hole along with the linkage mechanism.

[0013] Further, spring glands are respectively bolt-fixed on the lower left connecting rod and the lower right connecting rod, and the end of the connecting rod passes through the spring gland to prevent the tension spring from slipping off.

[0014] Further, for the support sleeve and bolt in the inner cavity of the middle seat that coincide with the movement track of the linkage mechanism, through holes are provided on the lower left connecting rod and the lower right connecting rod for the support sleeve and bolt to pass through.

[0015] Further, one end of the first through groove close to the jacket through hole is a circular structure to prevent the linkage mechanism from cracking when clamping the jacket.

[0016] Further, a middle seat through hole is provided in the middle of the bottom of the middle seat for the end of the eccentric shaft to pass through.

[0017] Further, a gland through-hole is provided on the gland for the end of the eccentric shaft to pass through.

[0018] Further, a plurality of sliders are fixed to the bottom of the inner cavity of the intermediate seat by bolts. The upper end surface of the slider is slightly higher than the bottom of the inner cavity of the intermediate seat, and the upper end surface of the slider is slidably connected to the bottom surfaces of the left lower connecting rod and the right lower connecting rod.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. The base is provided with quick installation holes. By cooperating with the preset connecting parts on the workbench surface, the overall quick disassembly and assembly of the fixture can be realized.

[0021] 2. The collet is directly used for clamping the eccentric shaft. One end of the eccentric shaft is inserted into the collet through-hole for clamping, and the part stop of the eccentric shaft is pressed and positioned with the collet plane. Compared with the traditional fixture that only performs radial positioning, it can ensure that the clamping of the eccentric shaft will not be affected by the tilting force, thereby improving the detection accuracy.

[0022] 3. One end of the collet is fixed by a positioning pin, and the other end of the collet is clamped and fixed by a link mechanism. The collet can be quickly disassembled and assembled by a plug-and-play method. When detecting eccentric shafts of different models, the fixture can be quickly put into production by replacing the collet, making the fixture highly versatile.

[0023] 4. The link mechanism is in close contact with the camshaft in the tooling drive under the action of the tension spring. The rotation of the camshaft periodically drives the link mechanism to clamp or release the collet. The periodic opening and clamping of the collet can be used to quickly clamp and remove the eccentric shaft, which is suitable for batch detection. Since the clamping force on the eccentric shaft is provided by the tension spring, the consistency of the clamping force is ensured, and the clamping accuracy is guaranteed. Description of the Drawings

[0024] The present invention will be further described below with reference to the drawings and embodiments.

[0025] Figure 1 is the overall structural schematic diagram of a quick fixture for detecting an eccentric shaft according to the present invention;

[0026] Figure 2 is the structural schematic diagram of a quick fixture for detecting an eccentric shaft according to the present invention when clamping the eccentric shaft;

[0027] Figure 3 is the structural schematic diagram of a quick fixture for detecting an eccentric shaft according to the present invention when removing the collet;

[0028] Figure 4 is the structural schematic diagram of a quick fixture for detecting an eccentric shaft according to the present invention when removing the collet and the gland;

[0029] Figure 5 It is a structural schematic diagram of removing a jacket, a gland, a left upper connecting rod and a right upper connecting rod of a quick clamp for detecting an eccentric shaft according to the present invention;

[0030] Figure 6 It is a structural schematic diagram of removing a jacket, a gland, and a connecting rod mechanism of a quick clamp for detecting an eccentric shaft according to the present invention;

[0031] Figure 7 It is a schematic diagram of the tooling drive and intermediate seat installation structure of a quick clamp for eccentric shaft detection according to the present invention;

[0032] Figure 8 It is a partial structural schematic diagram of the connecting rod mechanism of a quick clamp for eccentric shaft detection according to the present invention;

[0033] Figure 9 It is a schematic diagram of the base structure of a quick clamp for eccentric shaft detection according to the present invention;

[0034] Figure 10 The present invention is a schematic diagram of the structure of a clamping sleeve of a quick clamp for detecting an eccentric shaft.

[0035] The symbols in the accompanying drawings are described as follows:

[0036] 1. Base, 11. Quick installation hole, 12. Base through hole, 2. Middle seat, 21. Locating pin, 22. Support sleeve, 23. Middle seat through hole, 24. Slider, 3. Pressure cover, 31. Pressure cover through hole, 4. Tool drive, 41. Camshaft, 42. Upper sleeve, 43. Lower sleeve, 5. Connecting rod mechanism, 51. Upper left connecting rod, 52. Connecting rod bolt, 53. Connecting rod pin, 54. Upper right connecting rod, 55. Lower left connecting rod, 56. Tensioning spring, 57. Lower right connecting rod, 58. Spring pressure cover, 59. Connecting rod, 6. Jacket, 61. Locating hole, 62. Jacket through hole, 63. Camshaft hole, 64. Second through slot, 65. First through slot, 7. Eccentric shaft, 8. Top. DETAILED DESCRIPTION

[0037] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0038] like Figures 1 to 10A fast fixture for eccentric shaft detection shown in the figure includes a base 1, an intermediate seat 2, a gland 3, a tooling drive 4, a link mechanism 5, and a bushing 6. Both the base 1 and the intermediate seat 2 are hollow structures with upward openings. The bottom of the intermediate seat 2 is buckled with the opening end of the base 1 and fixedly connected to each other by bolts. Specifically, there is a boss in the inner cavity of the base 1 that closely adheres to the inner cavity wall. The bolt passes through the boss from the bottom of the base 1 and then is threadedly fastened to the bottom plate (bottom) of the intermediate seat 2. At the same time, the bottom plate (bottom) of the intermediate seat 2 is pressed against the boss to enhance the strength of the connection structure.

[0039] As Figure 9 shown, the base 1 is provided with a base through-hole 12 for a center point installed on the workbench to pass through. The bottom of the base 1 is provided with a quick installation hole 11, which is composed of an oblong hole and a circular hole with a radius larger than the oblong hole. The quick installation hole 11 is arranged around the base through-hole 12. In the embodiment shown in Figure 9 Figure, the quick installation hole 11 has an arc structure. The fixture is quickly loaded and unloaded from the workbench surface by rotation. When using the quick installation hole 11 to load and unload the workbench surface, a connecting piece adapted to the quick installation hole 11 should be pre-installed on the workbench surface, such as an iron nail or a bolt vertically fixed on the workbench surface that aligns with the circular hole on the quick installation hole 11.

[0040] As Figure 3 shown, the gland 3 is buckled with the opening end of the intermediate seat 2. As Figure 5 shown in Figure 6, four support sleeves 22 are evenly fixed at the bottom of the inner cavity of the intermediate seat 2. The bolt passes through the support sleeve 22 from the bottom of the intermediate seat 2 upward and is threadedly locked with the gland 3.

[0041] As Figure 6 、 7 shown, the tooling drive 4 includes a camshaft 41, an upper sleeve 42, and a lower sleeve 43. The lower sleeve 43 is sleeved into the through-hole at the bottom of the intermediate seat 2, the upper sleeve 42 is sleeved into the through-hole on the gland 3, the lower end of the camshaft 41 is slidably sleeved into the lower sleeve 43, and the upper end of the camshaft 41 is slidably sleeved into the upper sleeve 42, so that the camshaft 41 is axially limited. The upper end of the camshaft 41 is connected to an external power source. The external power source mentioned here includes but is not limited to a servo motor, a stepper motor, and a manual wrench.

[0042] As Figure 4 、 5As shown in Figures 8 and 10, the link mechanism 5 includes an upper left link 51, a lower left link 55, an upper right link 54, a lower right link 57, and a tension spring 56. The lower left link 55 and the lower right link 57 are symmetrically arranged in the inner cavity of the middle seat 2. The upper left link 51 and the upper right link 54 are symmetrically arranged above the gland 3. The upper left link 51 and the lower left link 55, and the upper right link 54 and the lower right link 57 are respectively fixed to each other by link bolts 52.

[0043] The ends of the lower left link 55 and the lower right link 57 close to the tooling drive are respectively in pressing connection with the cam surfaces of the camshaft 41. The other ends of the lower left link 55 and the lower right link 57 are respectively rotatably connected to two link pins 53. The two link pins 53 are respectively fixedly connected to the bottom of the inner cavity of the middle seat 2. Connecting rods 59 are respectively fixedly arranged between the two ends of the lower left link 55 and the lower right link 57. The two ends of the tension spring 56 are respectively sleeved on the connecting rods 59 on the lower left link 55 and the lower right link 57.

[0044] As Figure 1 、 2 As shown in Figures 8 and 10, the jacket 6 is arranged above the gland 3. One end of the jacket 6 close to the tooling drive 4 is provided with a camshaft hole 63 for the upper end of the camshaft 41 to pass through. The other end of the jacket 6 away from the tooling drive 4 is provided with a positioning hole 61. A positioning pin 21 is fixedly arranged at the bottom of the inner cavity of the middle seat 2. The positioning pin 21 passes upward through the gland and penetrates into the positioning hole 61. A jacket through-hole 62 is provided in the middle of the jacket 6. A plurality of first through-grooves 65 are radially arranged around the jacket through-hole 62 on the jacket 6, and a second through-groove 64 is provided through the centers of the jacket through-hole 62 and the camshaft hole 63. The upper left link 51 and the upper right link 54 are respectively closely attached to both sides of the end of the jacket 6 having the camshaft hole 63.

[0045] The existence of the second through-groove 64 and the first through-grooves 65 is to make the jacket 6 have a certain elasticity.

[0046] The upper left link 51 and the upper right link 54 respectively clamp the jacket 6, so that the second through-groove 64 on the jacket 6 is closed and the first through-grooves 65 are opened, then the camshaft hole 63 closes inwards, which can be used to clamp the eccentric shaft 7. In order to improve the positioning accuracy, in a possible embodiment, when the eccentric shaft 7 is clamped, the camshaft hole 63 completely fits the eccentric shaft 7, that is, it is a perfect circle. When the upper left link 51 and the upper right link 54 respectively loosen the jacket 6, the jacket 6 opens the second through-groove 64 and the first through-grooves 65 return to their original state under its own elastic action, and the camshaft hole 63 opens outwards, and then the eccentric shaft 7 can be removed.

[0047] As Figure 2As shown in the usage schematic diagram, it is known that the left-lower connecting rod 55 and the right-lower connecting rod 57 near one end of the camshaft 41 are tightly pressed against the cam. The cam cross-section on the camshaft 41 is actually an ellipse. Under the tension of the tension spring 56, the two ends of the minor axis of the cam cross-section are respectively pressed tightly against the left-lower connecting rod 55 and the right-lower connecting rod 57, achieving the reset function.

[0048] In the reset state, use a wrench to rotate the camshaft 41 by 90°. The camshaft hole 63 opens, and the lower end of the eccentric shaft 7 can be placed into the through-hole 62 of the jacket. The part stop of the eccentric shaft 7 is press-fitted and positioned with the jacket 6. Then use a wrench to rotate the camshaft 41 by 90° again, and the lower end of the eccentric shaft 7 is clamped and positioned by the camshaft hole 63. The upper end of the eccentric shaft 7 is positioned by the center point 8, and then the measurement can start. After the measurement is completed, use a wrench to rotate the camshaft 41 by 90° again, the camshaft hole 63 opens, and the eccentric shaft 7 can be removed. Subsequently, the lower end of a new eccentric shaft 7 is placed into the through-hole 62 of the jacket and clamped, and then the measurement can start. After the measurement is completed, use a wrench to rotate the camshaft 41 by 90° again, the camshaft hole 63 opens, and the eccentric shaft 7 can be removed. Subsequently, the lower end of a new eccentric shaft 7 is placed into the through-hole 62 of the jacket and clamped. By repeating this cycle, a large number of detections can be carried out.

[0049] The connecting rod bolt 52 passes through the gland 3. The gland 3 is provided with a through-hole along the movement trajectory of the connecting rod mechanism 5. The connecting rod bolt 52 moves within this through-hole along with the connecting rod mechanism 5.

[0050] As Figure 8 shown, spring glands 58 are respectively fixed to the left-lower connecting rod 55 and the right-lower connecting rod 57 by bolts. The end of the connecting rod 59 passes through the spring gland 58 to prevent the tension spring 56 from slipping off.

[0051] For the support sleeve 22 and the bolt in the inner cavity of the middle seat that coincide with the movement trajectory of the connecting rod mechanism, through-holes are provided on the left-lower connecting rod 55 and the right-lower connecting rod 57 for the support sleeve 22 and the bolt to pass through.

[0052] As Figure 10 shown, one end of the first through-groove 65 close to the through-hole 62 of the jacket is a circular structure to prevent the connecting rod mechanism 5 from cracking when clamping the jacket 6.

[0053] A middle seat through-hole 23 is provided in the middle of the bottom of the middle seat 2 for the end of the eccentric shaft 7 to pass through.

[0054] The gland 3 is provided with a gland through-hole 31 for the end of the eccentric shaft 7 to pass through.

[0055] A number of sliders 24 are fixed to the bottom of the inner cavity of the middle seat 2 by bolts. The upper end surface of the slider 24 is slightly higher than the bottom of the inner cavity of the middle seat 2, and the upper end surface of the slider 24 is slidably connected to the bottom surfaces of the left-lower connecting rod 55 and the right-lower connecting rod 57.

[0056] A rapid fixture for detecting an eccentric shaft according to the present invention includes a base, an intermediate seat, a gland, a tooling drive, a link mechanism, and a bushing. The base is provided with rapid installation holes, and the overall rapid disassembly and assembly of the fixture can be achieved by cooperating with preset connecting parts on the workbench surface. The bushing is directly used for clamping the eccentric shaft. One end of the eccentric shaft is inserted into the through hole of the bushing for clamping, and the part stop of the eccentric shaft is pressed and positioned with the plane of the bushing. Compared with traditional fixtures that only perform radial positioning, it can ensure that the clamping of the eccentric shaft is not affected by tilting forces, thereby improving the detection accuracy. One end of the bushing is fixed by a positioning pin, and the other end of the bushing is clamped and fixed by a link mechanism. The bushing can be quickly disassembled and assembled by plugging and unplugging. When detecting eccentric shafts of different models, the fixture can be quickly put into production by replacing the bushing, making the fixture highly versatile. The link mechanism is closely attached to the camshaft in the tooling drive under the action of a tension spring. The rotation of the camshaft periodically drives the link mechanism to clamp or release the bushing. By using the periodic opening and clamping of the bushing, the eccentric shaft can be quickly clamped and removed, which is suitable for batch detection. Since the clamping force on the eccentric shaft is provided by the tension spring, the consistency of the clamping force is ensured, and the clamping accuracy is guaranteed. Its structure is reasonable, and it has the advantages of convenient use, low clamping error, and high clamping efficiency, effectively solving the problem of low clamping accuracy of traditional detection fixtures.

[0057] Inspired by the above ideal embodiments of the present invention, through the above description, relevant staff can completely make various changes and modifications within the scope not deviating from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A quick fixture for eccentric shaft detection, characterized in that: It includes a base (1), an intermediate base (2), a gland (3), a tooling drive (4), a linkage mechanism (5), and a jacket (6). The base (1) and the intermediate base (2) are both hollow structures with upward openings. The bottom of the intermediate base (2) is buckled with the opening end of the base (1) and fixed to each other by bolts. The gland (3) is buckled with the opening end of the intermediate base (2). Four support sleeves (22) are evenly fixed at the bottom of the inner cavity of the intermediate base (2). Bolts pass through the support sleeves (22) from the bottom of the intermediate base (2) and are threadedly locked with the gland (3). The tooling drive (4) includes a camshaft (41), an upper sleeve (42), and a lower sleeve (43). The lower sleeve (43) is sleeved into the through hole at the bottom of the intermediate base (2), the upper sleeve (42) is sleeved into the through hole on the gland (3), the lower end of the camshaft (41) is slidably sleeved into the lower sleeve (43), and the upper end of the camshaft (41) is slidably sleeved into the upper sleeve (42), so that the camshaft (41) is axially limited. The linkage mechanism (5) includes a left upper connecting rod (51), a left lower connecting rod (55), a right upper connecting rod (54), a right lower connecting rod (57), and a tension spring (56). The left lower connecting rod (55) and the right lower connecting rod (57) are symmetrically arranged in the inner cavity of the intermediate base (2). The left upper connecting rod (51) and the right upper connecting rod (54) are symmetrically arranged above the gland (3). The left upper connecting rod (51) and the left lower connecting rod (55), and the right upper connecting rod (54) and the right lower connecting rod (57) are respectively fixed to each other by connecting rod bolts (52). One ends of the left lower connecting rod (55) and the right lower connecting rod (57) close to the tooling drive are respectively pressed and connected with the cam surface of the camshaft (41). The other ends of the left lower connecting rod (55) and the right lower connecting rod (57) are respectively rotatably connected with two connecting rod pins (53). The two connecting rod pins (53) are respectively fixed to the bottom of the inner cavity of the intermediate base (2). Connecting rods (59) are respectively fixed between the two ends of the left lower connecting rod (55) and the right lower connecting rod (57). The two ends of the tension spring (56) are respectively sleeved on the connecting rods (59) on the left lower connecting rod (55) and the right lower connecting rod (57). The jacket (6) is arranged above the gland (3). One end of the jacket (6) close to the tooling drive is provided with a camshaft hole (63) for the upper end of the camshaft (41) to pass through. The other end of the jacket (6) away from the tooling drive is provided with a positioning hole (61). A positioning pin (21) is fixed at the bottom of the inner cavity of the intermediate base (2). The positioning pin (21) passes through the gland upward and into the positioning hole (61). A jacket through hole (62) is provided in the middle of the jacket (6). A number of first through slots (65) are radially arranged around the jacket through hole (62) on the jacket (6), and a second through slot (64) is provided through the centers of the jacket through hole (62) and the camshaft hole (63). The left upper connecting rod (51) and the right upper connecting rod (54) are respectively close to both sides of the end of the jacket (6) with the camshaft hole (63).

2. The quick fixture for eccentric shaft detection according to claim 1, wherein: The base (1) is provided with a base through hole (12) for a center point for mounting on a workbench to pass through.

3. The quick fixture for detecting an eccentric shaft according to claim 2, characterized in that: The bottom of the base (1) is provided with quick installation holes (11), which are arranged around the base through hole (12), and the quick installation holes (11) have an arc-shaped structure, and the fixture is quickly loaded and unloaded from the workbench surface by rotation.

4. The quick fixture for eccentric shaft detection according to claim 1, characterized in that: The connecting rod bolt (52) passes through the gland (3), and through holes are provided on the gland (3) along the movement track of the connecting rod mechanism (5), and the connecting rod bolt (52) moves in the through holes along with the connecting rod mechanism (5).

5. The quick fixture for detecting an eccentric shaft according to claim 1, wherein: Spring glands (58) are respectively fixed on the left lower connecting rod (55) and the right lower connecting rod (57) by bolts, and the end of the connecting rod (59) passes through the spring gland (58) to prevent the tension spring (56) from slipping off.

6. The quick fixture for detecting an eccentric shaft according to claim 1, wherein: The support sleeve (22) and the bolts in the inner cavity of the middle seat, which coincide with the movement track of the connecting rod mechanism, are provided with through holes on the left lower connecting rod (55) and the right lower connecting rod (57) for the support sleeve (22) and the bolts to pass through.

7. The quick fixture for detecting an eccentric shaft according to claim 1, wherein: One end of the first through groove (65) close to the collet through hole (62) is a circular structure to prevent cracking when the connecting rod mechanism (5) clamps the collet (6).

8. The quick fixture for detecting an eccentric shaft according to claim 1, wherein: A middle seat through hole (23) is provided in the middle of the bottom of the middle seat (2) for the end of the eccentric shaft (7) to pass through.

9. The quick fixture for detecting an eccentric shaft according to claim 1, characterized in that: A gland through hole (31) is provided on the gland (3) for the end of the eccentric shaft (7) to pass through.

10. The quick fixture for detecting an eccentric shaft according to claim 1, characterized in that: A plurality of sliders (24) are fixed on the bottom of the inner cavity of the middle seat (2) by bolts. The upper end surface of the slider (24) is slightly higher than the bottom of the inner cavity of the middle seat (2), and the upper end surface of the slider (24) is slidably connected to the bottom surfaces of the left lower connecting rod (55) and the right lower connecting rod (57).

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