Fixture for machining crankshaft hole of engine

Abstract

The utility model relates to the technical field of engine crankshaft hole machining, and discloses a clamp for engine crankshaft hole machining, which solves the problem that a crankshaft is inconvenient to rotate and machine at present, and comprises a machining table, a clamping mechanism is arranged at the top of the machining table, and a limiting mechanism is arranged on the clamping mechanism. The clamping mechanism comprises a fixed plate fixed to the top of the machining table, two L-shaped round rods are symmetrically and fixedly connected between the fixed plate and the machining table, a movable plate is movably connected between the two L-shaped round rods in a sleeving mode, the movable plate and the fixed plate are arranged in parallel, and the sides, close to each other, of the fixed plate and the movable plate are rotationally connected with a first supporting shaft and a second supporting shaft correspondingly; the ends, close to each other, of the first supporting shaft and the second supporting shaft are fixedly connected with side discs. According to the crankshaft machining device, through cooperation of the driving bevel gear, the driven bevel gear, the first supporting shaft and the second supporting shaft, the crankshaft can be rotationally machined conveniently.

Description

Technical Field

[0001] This utility model belongs to the field of engine crankshaft hole machining technology, specifically a fixture for machining engine crankshaft holes. Background Technology

[0002] The crankshaft is the most important component in an engine. It bears the force transmitted from the connecting rod and converts it into torque, which is then output through the crankshaft to drive other accessories on the engine. The crankshaft is subjected to the combined effects of centrifugal force from the rotating mass, periodically changing gas inertial force, and reciprocating inertial force, resulting in bending and torsional loads. During the machining of engine crankshaft holes, a fixture is required for clamping and fixing. According to the patent document with authorization announcement number CN213970077U, entitled "A Fixture for Machining Engine Crankshafts," it consists of a fixed base and two clamping mechanisms. The two clamping mechanisms are slidably connected to both sides of the top of the fixed base. By sliding the clamping mechanisms on the top of the fixed base, the distance between the two clamping mechanisms can be adjusted, making it suitable for crankshafts of different specifications. It allows for lateral adjustment and can clamp various parts of the crankshaft, offering wide applicability and greatly improving the convenience of crankshaft machining. However, it still has the following drawbacks:

[0003] Although it can adjust the distance between the two clamping mechanisms to accommodate crankshafts of different specifications, it is difficult to make the crankshaft rotate, thus making it inconvenient to perform rotational machining on the crankshaft. Utility Model Content

[0004] In view of the above situation and to overcome the defects of the prior art, this utility model provides a jig for machining engine crankshaft holes, which effectively solves the problem that it is currently inconvenient to perform rotary machining on crankshafts.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a jig for machining engine crankshaft holes, comprising a machining table, wherein a clamping mechanism is provided on the top of the machining table, and a limiting mechanism is provided on the clamping mechanism;

[0006] The clamping mechanism includes a fixed plate fixed to the top of the processing table. Two L-shaped round rods are symmetrically fixedly connected between the fixed plate and the processing table. A movable plate is movably sleeved between the two L-shaped round rods. The movable plate and the fixed plate are arranged parallel to each other. Support shaft one and support shaft two are rotatably connected to the sides of the fixed plate and the movable plate that are close to each other, respectively. Side plates are fixedly connected to the ends of support shaft one and support shaft two that are close to each other. A lower arc plate is fixedly connected to the side plate. An upper arc plate is provided on the top of the lower arc plate. Two bolts are symmetrically installed between the upper arc plate and the lower arc plate.

[0007] Preferably, a top plate located below the movable plate is fixedly connected to the outer side of the fixed plate, a drive shaft is rotatably connected to the top of the top plate, a drive bevel gear is fixedly installed at the top of the drive shaft, and a driven bevel gear is fixedly installed on the outer side of the support shaft, the driven bevel gear meshing with the drive bevel gear.

[0008] Preferably, a U-shaped rod is fixedly installed on the outer side of the fixed plate, a slide plate is movably sleeved on the outer side of the U-shaped rod, a toothed plate is fixedly connected to the side of the slide plate near the drive shaft, a standard gear is fixedly installed on the outer side of the drive shaft, and the standard gear meshes with the toothed plate.

[0009] Preferably, a sleeve block is fixedly sleeved on the outer side of the U-shaped rod, a side block is fixedly connected on the side of the slide away from the toothed plate, and a cylinder is fixedly installed between the side block and the sleeve block.

[0010] Preferably, the limiting mechanism includes a side plate fixed to the movable plate on the side away from the fixed plate, a guide rod fixedly connected between the bottom of the side plate and the movable plate, a guide block movably sleeved on the outside of the guide rod, a spring fixedly connected between the guide block and the side plate, the spring being sleeved on the outside of the guide rod, a handle fixedly connected to the top of the guide block, the handle passing through the side plate and movably connected to the side plate, and a limiting rod fixedly connected to the outside of the guide block.

[0011] Preferably, the top of the top plate is provided with multiple limiting holes at equal intervals, and the limiting rod is inserted into the corresponding limiting hole.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. The L-shaped round rod, movable plate, side plate, upper arc plate, lower arc plate and bolts are used to clamp crankshafts of different specifications. The cylinder, side block, sliding plate, U-shaped round rod, gear plate and standard gear are used to drive the shaft to rotate. The drive bevel gear and driven bevel gear and support shaft one and support shaft two are used to rotate the crankshaft for machining.

[0014] 2. The cooperation between the handle, side plate, guide rod, guide block and spring makes it easy for the limit rod to be inserted into the corresponding limit hole, which can fix the movable plate and the top plate, thereby making it easy to adjust the distance between the two side plates to adapt to crankshafts of different specifications. Attached Figure Description

[0015] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0016] In the attached diagram:

[0017] Figure 1This is a schematic diagram of the fixture structure for machining engine crankshaft holes according to this utility model;

[0018] Figure 2 This is a schematic diagram of the clamping mechanism of this utility model;

[0019] Figure 3 This is a schematic diagram of the fixing plate structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the limiting mechanism of this utility model.

[0021] In the diagram: 1. Machining table; 2. Clamping mechanism; 201. Fixed plate; 202. Support shaft one; 203. L-shaped round rod; 204. Side plate; 205. Support shaft two; 206. Movable plate; 207. Top plate; 208. Driven bevel gear; 209. Upper arc plate; 2010. Lower arc plate; 2011. Bolt; 2012. Drive bevel gear; 2013. Standard gear; 2014. Gear plate; 2015. U-shaped round rod; 2016. Sleeve block; 2017. Cylinder; 2018. Side block; 2019. Slide plate; 2020. Drive shaft; 3. Limiting mechanism; 301. Side plate; 302. Spring; 303. Guide block; 304. Limiting rod; 305. Limiting hole; 306. Guide rod; 307. Handle. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] Example 1, by Figure 1 The present invention relates to a jig for machining engine crankshaft holes, including a machining table 1, a clamping mechanism 2 on the top of the machining table 1, and a limiting mechanism 3 on the clamping mechanism 2.

[0024] Specifically, by Figure 2-3The clamping mechanism 2 includes a fixed plate 201 fixed to the top of the processing table 1. Two L-shaped round rods 203 are symmetrically fixedly connected between the fixed plate 201 and the processing table 1. A movable plate 206 is movably sleeved between the two L-shaped round rods 203. The movable plate 206 and the fixed plate 201 are arranged parallel to each other. Support shaft 1 202 and support shaft 205 are rotatably connected to the sides of the fixed plate 201 and the movable plate 206 respectively. Side plates 204 are fixedly connected to the sides of the support shaft 1 202 and the support shaft 205 respectively. A lower arc plate 2010 is fixedly connected to the side plate 204. An upper arc plate 209 is provided on the top of the lower arc plate 2010. Two bolts 2011 are symmetrically installed between the upper arc plate 209 and the lower arc plate 2010. A top plate 207 located below the movable plate 206 is fixedly connected to the outside of the fixed plate 201. A drive shaft 2020 is rotatably connected to the top of the support shaft 202. A drive bevel gear 2012 is fixedly installed at the top of the drive shaft 202. A driven bevel gear 208 is fixedly installed on the outer side of the support shaft 202. The driven bevel gear 208 meshes with the drive bevel gear 2012. A U-shaped rod 2015 is fixedly installed on the outer side of the fixed plate 201. A slide plate 2019 is movably sleeved on the outer side of the U-shaped rod 2015. A toothed plate 2014 is fixedly connected to the side of the slide plate 2019 near the drive shaft 2020. A standard gear 2013 is fixedly installed on the outer side of the drive shaft 2020. The standard gear 2013 meshes with the toothed plate 2014. A sleeve block 2016 is fixedly sleeved on the outer side of the U-shaped rod 2015. A side block 2018 is fixedly connected to the side of the slide plate 2019 away from the toothed plate 2014. A cylinder 2017 is fixedly installed between the side block 2018 and the sleeve block 2016.

[0025] In operation, the crankshaft is first placed on the two lower arc plates 2010, and then the two upper arc plates 209 are fitted onto the crankshaft. The crankshaft is clamped by various bolts 2011. When the crankshaft needs to be rotated, the cylinder 2017 is activated, which drives the slide plate 2019 to slide along the U-shaped rod 2015 through the side block 2018, and drives the toothed plate 2014 to move horizontally. Since the toothed plate 2014 is meshed with the standard gear 2013, it drives the drive shaft 2020 to rotate, and drives the drive bevel gear 2012 to rotate. Since the drive bevel gear 2012 is meshed with the driven bevel gear 208, it drives the support shaft 202 to rotate, and finally realizes the rotational machining of the crankshaft.

[0026] Specifically, by Figure 4The limiting mechanism 3 includes a side plate 301 fixed to the side of the movable plate 206 away from the fixed plate 201. A guide rod 306 is fixedly connected between the bottom of the side plate 301 and the movable plate 206. A guide block 303 is movably sleeved on the outside of the guide rod 306. A spring 302 is fixedly connected between the guide block 303 and the side plate 301. The spring 302 is sleeved on the outside of the guide rod 306. A handle 307 is fixedly connected to the top of the guide block 303. The handle 307 passes through the side plate 301 and is movably connected to the side plate 301. A limiting rod 304 is fixedly connected to the outside of the guide block 303. A plurality of limiting holes 305 are provided at equal intervals on the top of the top plate 207. The limiting rod 304 is inserted into the corresponding limiting hole 305.

[0027] In use, first pull the handle 307, causing the guide block 303 to slide upward along the guide rod 306. At this time, the spring 302 is compressed, and the limit rod 304 rises until it moves out of the corresponding limit hole 305. Then, the movable plate 206 slides along the two L-shaped round rods 203. Adjust the distance between the two side plates 204 according to the crankshaft specifications. Then release the handle 307. At this time, the spring 302 returns to its original position, causing the guide block 303 to slide downward along the guide rod 306. At the same time, the limit rod 304 descends until it is inserted into the corresponding limit hole 305, thus fixing the movable plate 206 after it has moved.

Claims

1. A fixture for machining engine crankshaft holes, comprising a machining table (1), characterized in that: The top of the processing table (1) is provided with a clamping mechanism (2), and the clamping mechanism (2) is provided with a limiting mechanism (3); The clamping mechanism (2) includes a fixed plate (201) fixed to the top of the processing table (1). Two L-shaped round rods (203) are symmetrically fixedly connected between the fixed plate (201) and the processing table (1). A movable plate (206) is movably sleeved between the two L-shaped round rods (203). The movable plate (206) and the fixed plate (201) are arranged parallel to each other. Support shaft one (202) and support shaft two (205) are rotatably connected to the side of the fixed plate (201) and the movable plate (206) respectively. Side plates (204) are fixedly connected to the side plates (204). A lower arc plate (2010) is fixedly connected to the side plate (204). An upper arc plate (209) is provided on the top of the lower arc plate (2010). Two bolts (2011) are symmetrically installed between the upper arc plate (209) and the lower arc plate (2010).

2. The jig for machining engine crankshaft holes according to claim 1, characterized in that: The fixed plate (201) is fixedly connected to the top plate (207) located below the movable plate (206) on the outside. The top of the top plate (207) is rotatably connected to the drive shaft (2020). The top of the drive shaft (2020) is fixedly installed with a drive bevel gear (2012). The outer side of the support shaft (202) is fixedly installed with a driven bevel gear (208). The driven bevel gear (208) meshes with the drive bevel gear (2012).

3. The jig for machining engine crankshaft holes according to claim 1, characterized in that: A U-shaped rod (2015) is fixedly installed on the outside of the fixed plate (201). A sliding plate (2019) is movably sleeved on the outside of the U-shaped rod (2015). A toothed plate (2014) is fixedly connected to the side of the sliding plate (2019) near the drive shaft (2020). A standard gear (2013) is fixedly installed on the outside of the drive shaft (2020). The standard gear (2013) meshes with the toothed plate (2014).

4. The jig for machining engine crankshaft holes according to claim 3, characterized in that: A sleeve block (2016) is fixedly sleeved on the outer side of the U-shaped rod (2015), and a side block (2018) is fixedly connected to the side of the slide plate (2019) away from the toothed plate (2014). A cylinder (2017) is fixedly installed between the side block (2018) and the sleeve block (2016).

5. A fixture for machining engine crankshaft holes according to claim 1, characterized in that: The limiting mechanism (3) includes a side plate (301) fixed to the side of the movable plate (206) away from the fixed plate (201). A guide rod (306) is fixedly connected between the bottom of the side plate (301) and the movable plate (206). A guide block (303) is movably sleeved on the outside of the guide rod (306). A spring (302) is fixedly connected between the guide block (303) and the side plate (301). The spring (302) is sleeved on the outside of the guide rod (306). A handle (307) is fixedly connected to the top of the guide block (303). The handle (307) passes through the side plate (301) and is movably connected to the side plate (301). A limiting rod (304) is fixedly connected to the outside of the guide block (303).

6. The jig for machining engine crankshaft holes according to claim 2, characterized in that: The top plate (207) has multiple limiting holes (305) at equal intervals on its top, and the limiting rod (304) is inserted into the corresponding limiting hole (305).

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