Center hole tensioning and positioning device for flywheel machining

Abstract

According to the center hole tensioning and positioning device for flywheel machining, an expansion sleeve conical core seat comprises a conical part, a spring glue injection expansion sleeve is arranged on the conical part in a sleeving mode, the slope of the inner wall of the spring glue injection expansion sleeve is consistent with that of the outer wall of the conical part, a pull rod assembly comprises a pull rod and a blocking cover, the pull rod is fixedly connected with the blocking cover, and the pull rod is connected with a power device. A limiting long hole is formed in the expansion sleeve cone center seat, the limiting connecting block is located in the limiting long hole and fixedly connected with the pull rod, the limiting connecting block is located below the spring glue injection expansion sleeve, and when the power device drives the pull rod to move downwards, the blocking cover pushes the spring glue injection expansion sleeve to move downwards along the outer wall of the conical part. When the driving pull rod moves upwards, the limiting connecting block moves upwards in the limiting long hole, and the spring glue injection expansion sleeve is pushed to reset. The tensioning and positioning device can meet the positioning, tensioning and clamping requirements of flywheels of different specifications, and the clamping precision and efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tooling fixtures for parts processing, in particular to a center hole tensioning and positioning device for flywheel processing. Background Art

[0002] The engine flywheel is installed at the power output end of the engine. Its function is to store part of the energy generated during the power stroke of the engine to overcome the resistance of other auxiliary strokes, make the crankshaft rotate evenly, and improve the engine's ability to overcome short-term overloads, making it easier for the vehicle to start. In flywheel processing, it is necessary to drill holes on the flywheel. Usually, the flywheel is first positioned, clamped and fixed to the tooling, and then drilled using drilling equipment.

[0003] During the flywheel positioning and clamping process, a center hole positioning mechanism (sometimes called an expansion sleeve mechanism) is needed to center the center hole of the flywheel, and to clamp and position the flywheel in cooperation with other supporting and clamping components. However, the existing center hole positioning mechanism has a slow clamping speed, is inconvenient to operate, and can only perform positioning and clamping functions on flywheels of one specification. Therefore, it is necessary to design a center hole tensioning and positioning device that can quickly position, tighten and clamp the center hole of the flywheel, can meet the positioning, tightening and clamping of the center holes of flywheels of different specifications within a certain range, and can improve the accuracy and clamping efficiency of flywheel positioning and clamping. Utility Model Content

[0004] In order to overcome the deficiencies of the above-mentioned prior art, the technical problem to be solved by the utility model is to provide a center hole tightening and positioning device for flywheel processing, which can quickly realize the clamping and positioning of the center hole of the flywheel, meet the positioning, tightening and clamping of the center holes of flywheels of different specifications within a certain range, and can improve the accuracy and efficiency of flywheel positioning and clamping.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A center hole tensioning and positioning device for flywheel processing, characterized in that:

[0007] It includes an expansion sleeve cone core seat, a spring injection expansion sleeve, a power device, a pull rod assembly and a reset assembly. The expansion sleeve cone core seat includes a conical portion, the spring injection expansion sleeve is sleeved on the conical portion, and the inner wall of the spring injection expansion sleeve has the same slope as the outer wall of the conical portion.

[0008] The pull rod assembly includes a pull rod and a cover, the pull rod and the cover are fixedly connected, and the pull rod is connected to the power device.

[0009] The reset assembly includes a limit connecting block and a limit long hole opened on the expansion sleeve cone core seat, the limit connecting block is located in the limit long hole and is fixedly connected to the pull rod, and the limit connecting block is located below the spring injection expansion sleeve.

[0010] When the power device drives the pull rod to move downward, the blocking cover pushes the spring glue injection expansion sleeve to move downward along the outer wall of the tapered portion, so that the spring glue injection expansion sleeve moves radially outward to tighten and position the flywheel.

[0011] When the power device drives the pull rod to move upward, the limiting connection block moves upward in the limiting long hole and pushes the spring glue injection expansion sleeve to return to its original position.

[0012] Preferably, the center hole tensioning and positioning device comprises a gasket ring, which is sleeved on the expansion sleeve cone seat, and the gasket ring is located below the spring injection expansion sleeve and above the limit connecting block.

[0013] Preferably, the power device is configured as a hydraulic cylinder, the hydraulic cylinder comprises a cylinder body and a piston rod, and the pull rod is threadedly fixedly connected to the piston rod.

[0014] Preferably, a stepped hole is provided in the expansion sleeve cone seat to form a receiving cavity at the lower part and a guide hole at the upper part, the cylinder body is located in the receiving cavity, and the pull rod can slide up and down along the guide hole.

[0015] Preferably, the limiting connecting block is configured as a pin shaft, and cutting planes are provided in the circumferential direction at both ends of the pin shaft.

[0016] Preferably, the blocking cover and the upper end of the pull rod are fixedly connected by bolts.

[0017] Preferably: a dust cover is fixed on the blocking cover.

[0018] After adopting the above technical solution, the beneficial effects of the utility model are:

[0019] The utility model discloses a center hole tensioning and positioning device for flywheel processing, wherein the expansion sleeve conical seat comprises a conical portion, the spring glue injection expansion sleeve is arranged on the conical portion, and the inner wall of the spring glue injection expansion sleeve has the same slope as the outer wall of the conical portion, and a pull rod is arranged in the expansion sleeve conical seat, the pull rod is fixedly connected to the blocking cover, and the pull rod is connected to the power device.

[0020] A long limiting hole is provided on the cone center seat of the expansion sleeve, the limiting connecting block is located in the long limiting hole and fixedly connected to the pull rod, the limiting connecting block is located below the spring injection expansion sleeve, when the power device drives the pull rod to move downward, the blocking cover pushes the spring injection expansion sleeve to move downward along the outer wall of the conical portion, so that the spring injection expansion sleeve moves radially outward to tighten and position the flywheel; when the power device drives the pull rod to move upward, the limiting connecting block moves upward in the long limiting hole and pushes the spring injection expansion sleeve to reset.

[0021] The spring glue injection expansion sleeve changes the size of the outer diameter through the taper of the conical part during the downward or upward movement along the axial direction of the expansion sleeve cone seat, and the workpiece is loosened, clamped and positioned by changing the size of the outer diameter. In addition, the distance of the spring glue injection expansion sleeve moving radially outward can be controlled by controlling the downward movement distance of the spring glue injection expansion sleeve, so that flywheels of different specifications can be clamped and positioned.

[0022] The center hole tensioning and positioning device for flywheel processing of the utility model can quickly realize the clamping and positioning of the center hole of the flywheel, and can meet the positioning, tensioning and clamping of the center holes of flywheels of different specifications within a certain range, thereby improving the accuracy and efficiency of flywheel positioning and clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the center hole tensioning and positioning device for flywheel processing of the utility model;

[0024] Figure 2 yes Figure 1 Schematic cross-sectional view at CC in the middle;

[0025] Figure 3 It is a three-dimensional schematic diagram of the center hole tensioning and positioning device for flywheel processing of the utility model;

[0026] In the figure:

[0027] 2. Center hole tensioning and positioning device; 201. Expansion sleeve cone seat; 2011. Conical portion; 2012. Limiting long hole; 2013. Accommodating cavity; 2014. Guide hole; 202. Spring injection expansion sleeve; 203. Pull rod; 204. Block cover; 205. Limiting connecting block; 206. Gasket; 207. Cylinder body; 208. Piston rod; 209. Dust cover. DETAILED DESCRIPTION

[0028] The utility model discloses some embodiments, which will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0029] like Figures 1 to 3The center hole tensioning and positioning device 2 for flywheel processing shown in the figure comprises an expansion sleeve conical seat 201, a spring injection expansion sleeve 202, a power device, a pull rod assembly and a reset assembly. The expansion sleeve conical seat 201 comprises a conical portion 2011, the spring injection expansion sleeve 202 is sleeved on the conical portion 2011, and the inner wall of the spring injection expansion sleeve 202 has the same slope as the outer wall of the conical portion 2011.

[0030] The pull rod assembly includes a pull rod 203 and a cover 204. The pull rod 203 and the cover 204 are fixedly connected. The pull rod 203 is connected to the power device.

[0031] The reset assembly includes a limit connection block 205 and a limit long hole 2012 opened on the expansion sleeve cone seat 201. The limit connection block 205 is located in the limit long hole 2012 and is fixedly connected to the pull rod 203. The limit connection block 205 is located below the spring injection expansion sleeve 202.

[0032] When the power device drives the pull rod 203 to move downward, the stop cover 204 pushes the spring glue injection expansion sleeve 202 to move downward along the outer wall of the conical portion 2011, so that the spring glue injection expansion sleeve 202 moves radially outward to tighten and position the flywheel.

[0033] When the power device drives the pull rod 203 to move upward, the limiting connection block 205 moves upward in the limiting long hole 2012 and pushes the spring glue injection expansion sleeve 202 to return to its original position.

[0034] The spring glue injection expansion sleeve 202 changes the size of the outer diameter through the taper of the conical portion 2011 during the downward or upward movement along the axial direction of the expansion sleeve cone seat 201, and the workpiece is loosened, clamped and positioned by changing the size of the outer diameter. In addition, the distance of the spring glue injection expansion sleeve 202 moving radially outward can be controlled by controlling the downward movement distance of the spring glue injection expansion sleeve 202, so that flywheels of different specifications can be clamped and positioned.

[0035] In some embodiments, the center hole tensioning and positioning device 2 includes a gasket 206, which is sleeved on the expansion sleeve cone seat 201, and the gasket 206 is located below the spring injection expansion sleeve 202 and above the limit connection block 205. When the hydraulic cylinder drives the pull rod 203 to move upward, the pin moves upward in the limit long hole 2012, and pushes the gasket 206 and the spring injection expansion sleeve 202 to move upward, thereby resetting the spring injection expansion sleeve 202. During the resetting process, the gasket 206 can prevent the spring injection expansion sleeve 202 from directly contacting the limit connection block 205, and prevent the lower end of the spring injection expansion sleeve 202 from being worn after long-term use.

[0036] In some embodiments, the power device is preferably configured as a hydraulic cylinder, which includes a cylinder body 207 and a piston rod 208, and the pull rod 203 is threadedly fixedly connected to the piston rod 208. The hydraulic drive is stable, faster than the manual expansion sleeve tightening speed, and saves time.

[0037] A stepped hole is provided in the expansion sleeve cone seat 201 to form a receiving cavity 2013 at the lower part and a guide hole 2014 at the upper part. The cylinder body 207 is located in the receiving cavity 2013 , and the pull rod 203 can slide up and down along the guide hole 2014 .

[0038] In some embodiments, the limiting connecting block 205 is preferably configured as a pin shaft, and cutting planes are provided on the circumference of both ends of the pin shaft. When the hydraulic cylinder drives the pull rod 203 to move upward, the pin shaft moves upward in the limiting long hole 2012 and pushes the spring injection sleeve 202 to reset. The cutting planes on the circumference of both ends of the pin shaft can increase the area so as to push the gasket 206 or the spring injection sleeve 202.

[0039] In some embodiments, the blocking cover 204 and the upper end of the pull rod 203 are preferably fixedly connected by bolts.

[0040] In some embodiments, a dust cover 209 is fixed on the blocking cover 204. The dust cover 209 can be a nylon cover.

[0041] During use, the bottom end of the expansion sleeve cone seat 201 is fixed to the tooling bottom plate. When the center hole of the flywheel to be tightened is placed on the expansion sleeve cone seat 201, the hydraulic cylinder is started, and the piston rod 208 drives the pull rod and the stop cover 204 to move downward. The stop cover 204 pushes the spring injection expansion sleeve 202 to move downward along the outer wall of the tapered portion 2011, so that the spring injection expansion sleeve 202 moves radially outward to locate the center hole of the tensioned flywheel, and then clamp the flywheel.

[0042] When the hydraulic cylinder drives the pull rod 203 to move upward, the limiting connecting block 205 (preferably set as a pin) moves upward in the limiting long hole 2012, and pushes the spring injection expansion sleeve 202 to move upward and reset.

[0043] The center hole tensioning and positioning device for flywheel processing of the utility model can quickly realize the clamping and positioning of the center hole of the flywheel, and can meet the positioning, tensioning and clamping of the center holes of flywheels of different specifications within a certain range, thereby improving the accuracy and efficiency of flywheel positioning and clamping.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A center hole tensioning and positioning device for flywheel processing, characterized in that: It includes an expansion sleeve cone core seat, a spring injection expansion sleeve, a power device, a pull rod assembly and a reset assembly. The expansion sleeve cone core seat includes a conical portion, the spring injection expansion sleeve is sleeved on the conical portion, and the inner wall of the spring injection expansion sleeve has the same slope as the outer wall of the conical portion. The pull rod assembly includes a pull rod and a cover, the pull rod and the cover are fixedly connected, and the pull rod is connected to the power device. The reset assembly includes a limit connecting block and a limit long hole opened on the expansion sleeve cone core seat, the limit connecting block is located in the limit long hole and is fixedly connected to the pull rod, and the limit connecting block is located below the spring injection expansion sleeve. When the power device drives the pull rod to move downward, the blocking cover pushes the spring glue injection expansion sleeve to move downward along the outer wall of the tapered portion, so that the spring glue injection expansion sleeve moves radially outward to tighten and position the flywheel. When the power device drives the pull rod to move upward, the limiting connection block moves upward in the limiting long hole and pushes the spring glue injection expansion sleeve to return to its original position.

2. The center hole tensioning and positioning device for flywheel machining according to claim 1, characterized in that: The center hole tensioning and positioning device comprises a gasket ring, which is sleeved on the expansion sleeve cone seat, and is located below the spring glue injection expansion sleeve and above the limiting connection block.

3. The center hole tensioning and positioning device for flywheel machining according to claim 1, characterized in that: The power device is configured as a hydraulic cylinder, which includes a cylinder body and a piston rod, and the pull rod is threadedly fixedly connected to the piston rod.

4. The center hole tensioning and positioning device for flywheel machining according to claim 3, characterized in that: The expansion sleeve cone seat is provided with a stepped hole to form a receiving cavity at the lower part and a guide hole at the upper part. The cylinder body is located in the receiving cavity, and the pull rod can slide up and down along the guide hole.

5. The center hole tensioning and positioning device for flywheel machining according to claim 1, characterized in that: The limiting connection block is configured as a pin shaft, and cutting planes are provided on the circumference of both ends of the pin shaft.

6. The center hole tensioning and positioning device for flywheel machining according to claim 1, characterized in that: The blocking cover and the upper end of the pull rod are fixedly connected by bolts.

7. The center hole tensioning and positioning device for flywheel machining according to claim 1, characterized in that: A dust cover is fixed on the blocking cover.

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