Centering hole searching device for crankshaft machining

Abstract

The utility model relates to the technical field of crankshaft processing, and disclose a kind of centering hole finding device in crankshaft processing, including base, the bottom of base is fixedly connected with support leg around symmetry, the top of base is provided with clamping positioning mechanism, the top of base is provided with centering mechanism close to right side, the clamping positioning mechanism includes first clamping frame, the first clamping frame is fixedly connected in the top of base close to left side, the top of base is fixedly connected with fixed column around symmetry. First clamping frame in clamping positioning mechanism and second clamping frame cooperate, move second clamping frame by first hydraulic cylinder drive, realize the quick clamping of crankshaft. V-shaped rubber pad is equipped in the V-shaped groove of two ends, increase the friction force with the surface of crankshaft, avoid the sliding of crankshaft in clamping process, ensure that the position of crankshaft is stable in centering hole finding process, effectively improve processing precision and stability.

Description

Technical Field

[0001] This utility model relates to the field of crankshaft machining technology, specifically to a centering hole finding device used in crankshaft machining. Background Technology

[0002] In the machinery manufacturing industry, crankshafts are key components of core power equipment such as engines, and their machining accuracy directly affects the operating performance, reliability, and service life of the equipment. As an important reference for crankshaft machining, accurately locating and positioning the centering hole is a fundamental step in ensuring the accuracy of subsequent crankshaft machining.

[0003] According to announcement number CN 211072700 U, a centering hole finding device for crankshaft machining is provided at both ends of the crankshaft, including: a protective cover, which extends to the side to form a protective cover with a cavity, and the protective cover is placed on the end to protect the end face; a fastening device, which passes through the cavity on the protective cover and abuts against the end of the crankshaft; and a dynamic balancing machine, which is provided with support rollers at both ends for supporting the protective cover.

[0004] This device utilizes the principle of pre-dynamic balancing using a dynamic balancing machine. The dynamic balancing machine is then used to locate the centering hole, saving the cost of purchasing a separate centering machine. Furthermore, for different crankshaft models, different pre-dynamic balancing joints can be selected before machining to match the crankshaft model. The dynamic balancing machine then locates the dynamic balance point, ultimately determining the centering hole. However, this device uses simple mechanical auxiliary equipment, resulting in poor stability when clamping the crankshaft. Utility Model Content

[0005] The purpose of this invention is to provide a centering hole finding device for crankshaft machining, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a centering hole finding device for crankshaft machining, comprising a base, with supporting legs symmetrically fixedly connected to the bottom of the base in the front, back, left, and right directions, a clamping and positioning mechanism provided on the top of the base, and a centering mechanism provided on the top of the base near the right side;

[0007] The clamping and positioning mechanism includes a first clamping frame, which is fixedly connected to the top of the base near the left side. The top of the base is symmetrically and fixedly connected with four fixed columns. A fixed seat is fixedly connected to the top of each of the four fixed columns. A first hydraulic cylinder is fixedly connected to the top left side of the fixed seat. A second clamping frame corresponding to the first clamping frame is fixedly connected to the output end of the first hydraulic cylinder. V-grooves are provided at both ends of the first and second clamping frames. A sliding cylinder is symmetrically and fixedly connected to the top left side of the fixed seat. A cylindrical rack is slidably connected to the inner wall of the sliding cylinder. A fixed frame is symmetrically and fixedly connected to the top left side of the fixed seat. Rotating shafts are provided on the left and right sides of the inner walls of the two fixed frames near the top. Gears are symmetrically and fixedly connected to the surfaces of the rotating shafts.

[0008] Preferably, the V-groove is provided with a V-shaped rubber pad to make the crankshaft clamping more stable.

[0009] Preferably, the top left side of the fixing seat has a hole that matches the cylindrical rack, and the surface of the cylindrical rack is penetrated and slidably connected to the hole, and the bottom ends of the four cylindrical racks are fixedly connected to the top of the second clamping frame.

[0010] Preferably, the inner walls of the two fixing frames have holes on the left and right sides near the top that match the rotating shaft, and the rotating shaft surface passes through and is rotatably connected in the holes. The gear meshes with the cylindrical rack, and through the cooperation of the gear and the cylindrical rack, the second clamping frame is always in a horizontal state when it descends, and there will be no tilting.

[0011] Preferably, the centering mechanism includes a fixing plate, which is fixedly connected to the top of the base near the right side. A second hydraulic cylinder is fixedly connected to the right side of the fixing plate near the top. A rectangular frame is fixedly connected to the output end of the second hydraulic cylinder. A servo motor is fixedly connected to the left side of the inner wall of the rectangular frame. A positioning pin is fixedly connected to the output end of the servo motor.

[0012] Preferably, the inner wall of the rectangular frame has a hole on the left side that matches the output shaft of the servo motor, and the surface of the output shaft of the servo motor passes through and is rotatably connected to the hole.

[0013] Preferably, the left end of the positioning pin is a pointed tip, and the left end of the positioning pin and the crankshaft center held by the first clamping frame and the second clamping frame are on the same horizontal line.

[0014] Compared with the prior art, this utility model provides a centering hole finding device for crankshaft machining, which has the following beneficial effects:

[0015] 1. In the machining of this crankshaft, a centering hole finding device is used. The first clamping frame and the second clamping frame in the clamping and positioning mechanism cooperate. The second clamping frame is driven to move by the first hydraulic cylinder to achieve rapid clamping of the crankshaft. V-shaped rubber pads are installed in the V-grooves at both ends to increase the friction with the crankshaft surface, prevent the crankshaft from sliding during clamping, ensure the crankshaft's stable position during the centering hole finding process, and effectively improve machining accuracy and stability.

[0016] 2. A centering hole finding device is used in the crankshaft machining process. The second hydraulic cylinder in the centering mechanism drives a rectangular frame to move, causing a servo motor and a positioning pin to approach the crankshaft, achieving automated centering operation. The servo motor can precisely control the rotation of the positioning pin, ensuring the pin tip is on the same horizontal line as the crankshaft center. This allows for quick and accurate location of the crankshaft center, significantly improving the efficiency and accuracy of centering hole finding compared to traditional manual methods, reducing human error, and enhancing the overall quality of crankshaft machining. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present utility model;

[0019] Figure 2 This is a three-dimensional schematic diagram of the clamping and positioning mechanism of this utility model;

[0020] Figure 3 This is a three-dimensional schematic diagram of the sliding cylinder and cylindrical rack of this utility model;

[0021] Figure 4 This is a three-dimensional schematic diagram of the structural fixing plate and rectangular frame of this utility model;

[0022] Figure 5 This is a three-dimensional schematic diagram of the servo motor and positioning pin of this utility model.

[0023] In the diagram: 1. Base; 2. Support leg; 3. Clamping and positioning mechanism; 31. First clamping frame; 32. Fixed column; 33. Fixed seat; 34. First hydraulic cylinder; 35. Second clamping frame; 36. V-groove; 37. Slide cylinder; 38. Cylindrical rack; 39. Fixed frame; 311. Rotating shaft; 312. Gear; 4. Centering mechanism; 41. Fixed plate; 42. Second hydraulic cylinder; 43. Rectangular frame; 44. Servo motor; 45. Positioning pin. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] This utility model provides the following technical solution:

[0027] Example 1

[0028] Please see Figure 1-3 This utility model provides a technical solution: a centering hole finding device for crankshaft machining, including a base 1, with support legs 2 symmetrically fixedly connected to the bottom of the base 1 in the front, back, left and right directions, a clamping and positioning mechanism 3 provided on the top of the base 1, and a centering mechanism 4 provided on the top of the base 1 near the right side.

[0029] The clamping and positioning mechanism 3 includes a first clamping frame 31, which is fixedly connected to the top of the base 1 near the left side. The top of the base 1 is symmetrically connected to fixed columns 32. The top of the four fixed columns 32 is fixedly connected to fixed seats 33. The top left side of the fixed seats 33 is fixedly connected to a first hydraulic cylinder 34. The output end of the first hydraulic cylinder 34 is fixedly connected to a second clamping frame 35 corresponding to the first clamping frame 31. Both ends of the first clamping frame 31 and the second clamping frame 35 are provided with V-grooves 36. The top left side of the fixed seats 33 is symmetrically connected to a sliding cylinder 37. The inner wall of the sliding cylinder 37 is slidably connected to a cylindrical rack 38. The top left side of the fixed seats 33 is symmetrically fixed to fixed frames 39. The inner walls of the two fixed frames 39 are provided with rotating shafts 311 near the top on the left and right sides. The surface of the rotating shafts 311 is symmetrically fixed to gears 312.

[0030] The V-groove 36 is equipped with a V-shaped rubber pad, which makes the crankshaft clamping more stable.

[0031] The top left side of the fixed base 33 has a hole that matches the cylindrical rack 38, and the surface of the cylindrical rack 38 is penetrated and slidably connected to the hole. The bottom ends of the four cylindrical racks 38 are fixedly connected to the top of the second clamping frame 35.

[0032] The inner walls of the two fixed brackets 39 have holes on the left and right sides near the top that match the rotating shaft 311. The rotating shaft 311 passes through the surface and is rotatably connected to the hole. The gear 312 meshes with the cylindrical rack 38. Through the cooperation of the gear 312 and the cylindrical rack 38, the second clamping frame 35 is always in a horizontal state when it descends and will not tilt.

[0033] Example 2

[0034] Please see Figure 4-5 Furthermore, based on Example 1, a centering mechanism 4 was obtained.

[0035] The centering mechanism 4 includes a fixed plate 41, which is fixedly connected to the top of the base 1 near the right side. A second hydraulic cylinder 42 is fixedly connected to the right side of the fixed plate 41 near the top. A rectangular frame 43 is fixedly connected to the output end of the second hydraulic cylinder 42. A servo motor 44 is fixedly connected to the left side of the inner wall of the rectangular frame 43. A positioning pin 45 is fixedly connected to the output end of the servo motor 44.

[0036] The inner left side of the rectangular frame 43 has a hole that matches the output shaft of the servo motor 44, and the surface of the output shaft of the servo motor 44 passes through and is rotatably connected to the hole.

[0037] The left end of the positioning pin 45 is a pointed tip, and the left end of the positioning pin 45 and the crankshaft center held by the first clamping frame 31 and the second clamping frame 35 are on the same horizontal line.

[0038] In actual operation, when this device is used, the crankshaft is placed in the V-groove 36 on the top of the first clamping frame 31 and fixed by the clamping and positioning mechanism 3. At this time, the first hydraulic cylinder 34 is activated, and the output end of the first hydraulic cylinder 34 pushes the second clamping frame 35 to move towards the first clamping frame 31. Since four cylindrical racks 38 are fixedly connected to the top of the second clamping frame 35, and the cylindrical racks 38 pass through the holes on the top left side of the fixed base 33 and slide up and down in the holes, while the cylindrical racks 38 mesh with the gears 312 on the rotating shaft 311 inside the fixed frame 39, when the second clamping frame 35 moves, the cylindrical racks 38 slide in the holes and drive the gears 312 to rotate. Through the cooperation between the gears 312 and the cylindrical racks 38, it is ensured that the second clamping frame 35 remains horizontal during the descent and will not tilt. As the second clamping frame 35 approaches the first clamping frame 31, the V-shaped grooves 36 at both ends of the first clamping frame 31 and the second clamping frame 35 gradually clamp the crankshaft. Since the V-shaped rubber pads are provided in the V-shaped grooves 36, the friction between the crankshaft and the crankshaft is increased, thereby making the crankshaft clamped more stably and completing the positioning of the crankshaft.

[0039] After the crankshaft is clamped and fixed, the centering mechanism 4 is activated. The second hydraulic cylinder 42 is fixed to the right side of the fixing plate 41 near the top. Its output end pushes the rectangular frame 43 to move to the left, so that the servo motor 44 and the positioning pin 45 inside the rectangular frame 43 are close to the crankshaft. Because the left end of the positioning pin 45 is a sharp point, and the left end of the positioning pin 45 and the center of the crankshaft clamped by the first clamping frame 31 and the second clamping frame 35 are on the same horizontal line, the positioning pin 45 can accurately align with the center position of the crankshaft during the movement of the rectangular frame 43. When the positioning pin 45 approaches the crankshaft, the servo motor 44 is activated. The servo motor 44 drives the positioning pin 45 to rotate, using the sharp point of the positioning pin 45 to find and determine the position of the centering hole on the crankshaft, thereby completing the work of finding the crankshaft centering hole.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A centering hole finding device for crankshaft machining, comprising a base (1), characterized in that: The base (1) has symmetrically fixed support legs (2) at the bottom, front, back, left and right. The base (1) has a clamping and positioning mechanism (3) at the top and a centering mechanism (4) near the right side of the top. The clamping and positioning mechanism (3) includes a first clamping frame (31), which is fixedly connected to the top of the base (1) near the left side. The top of the base (1) is symmetrically connected with four fixed columns (32). The tops of the four fixed columns (32) are fixedly connected with fixed seats (33). The left side of the top of the fixed seat (33) is fixedly connected with a first hydraulic cylinder (34). The output end of the first hydraulic cylinder (34) is fixedly connected with a second clamping frame (35) corresponding to the first clamping frame (31). V-grooves (36) are provided at both ends of the first clamping frame (31) and the second clamping frame (35). A slide cylinder (37) is symmetrically fixedly connected to the top left side of the fixed base (33). A cylindrical rack (38) is slidably connected to the inner wall of the slide cylinder (37). A fixing frame (39) is symmetrically fixedly connected to the top left side of the fixed base (33). A rotating shaft (311) is provided on the left and right sides of the inner wall of the two fixing frames (39) near the top. Gears (312) are symmetrically fixedly connected to the surface of the rotating shaft (311).

2. The centering hole finding device for crankshaft machining according to claim 1, characterized in that: The V-groove (36) is provided with a V-shaped rubber pad.

3. A centering hole finding device for crankshaft machining according to claim 1, characterized in that: The top left side of the fixed base (33) has a hole that matches the cylindrical rack (38), and the surface of the cylindrical rack (38) is penetrated and slidably connected to the hole. The bottom ends of the four cylindrical racks (38) are fixedly connected to the top of the second clamping frame (35).

4. A centering hole finding device for crankshaft machining according to claim 1, characterized in that: The inner walls of the two fixing brackets (39) are provided with holes on the left and right sides near the top that match the rotating shaft (311), and the rotating shaft (311) is rotatably connected to the hole through the surface. The gear (312) meshes with the cylindrical rack (38).

5. A centering hole finding device for crankshaft machining according to claim 1, characterized in that: The centering mechanism (4) includes a fixing plate (41), which is fixedly connected to the top of the base (1) near the right side. A second hydraulic cylinder (42) is fixedly connected to the right side of the fixing plate (41) near the top. A rectangular frame (43) is fixedly connected to the output end of the second hydraulic cylinder (42). A servo motor (44) is fixedly connected to the left side of the inner wall of the rectangular frame (43). A positioning pin (45) is fixedly connected to the output end of the servo motor (44).

6. A centering hole finding device for crankshaft machining according to claim 5, characterized in that: The inner wall of the rectangular frame (43) has a hole on the left side that matches the output shaft of the servo motor (44), and the surface of the output shaft of the servo motor (44) passes through and is rotatably connected to the hole.

7. A centering hole finding device for crankshaft machining according to claim 5, characterized in that: The left end of the positioning pin (45) is a pointed tip, and the left end of the positioning pin (45) and the crankshaft center held by the first clamping frame (31) and the second clamping frame (35) are on the same horizontal line.

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