Crankshaft center hole chamfering and cutting device

Abstract

The utility model discloses a crankshaft center hole chamfer cutting device, and particularly relates to the crankshaft cutting technical field, the crankshaft center hole chamfer cutting device comprises a base, a mounting rack is arranged above the base, a screw rod is arranged on the top of the mounting rack, a wheel disc is arranged at one end of the screw rod, and a mounting plate is arranged at one end of the screw rod far away from the wheel disc; one side of each fixing rod is provided with a connecting shaft, each connecting shaft is connected with one end of a connecting plate, the other end of each connecting plate is connected with a clamping block through the connecting shaft, each clamping block is located in a limiting groove, and the limiting groove is formed in the limiting disc. According to the crankshaft center hole chamfering and cutting device, the crankshaft center hole subjected to chamfering and cutting is cleaned by installing the burr knife, and the burr knife is provided with abrasive paper and a brush, so that the crankshaft center hole can be better cleaned.

Description

Technical Field

[0001] This utility model relates to the field of crankshaft cutting technology, and more specifically, to a crankshaft center hole chamfering and cutting device. 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. Therefore, the crankshaft requires sufficient strength and rigidity. To reduce weight, the crankshaft is chamfered. Chamfering can be done through various methods such as milling, turning (lathe turning), and manual operation. Milling involves pressing a rotating cutting tool against a workpiece fixed on a slide to complete the machining process.

[0003] A search revealed that application number CN201680083367.1 discloses a valve regulating actuator with a damping circuit. This damping circuit has a capacitor damping current loop, which is activated in the generator operation mode of a stepper motor. The damping circuit and the motor windings form a resonant system LCR, which stabilizes and regulates the rotational speed. The rotational speed of the stepper motor operating in generator mode is constantly maintained within a limit, i.e., no adjustment intervention from the control circuit is required. Therefore, even in the current-free control state, the damping circuit can operate reliably and is independent of the external current supply. It can achieve both rapid closure and reliably prevent the motor from running inertia for too long. The inventors discovered the following problems with the prior art during the development of this utility model:

[0004] When using existing crankshaft center hole chamfering and cutting devices, a large number of burrs and debris will appear after the crankshaft center hole is chamfered and cut, which will cause serious damage to the high-precision crankshaft. Existing crankshaft center hole chamfering and cutting devices often cannot accurately position the crankshaft center hole, resulting in ineffective chamfering of the crankshaft center hole or even damage to the crankshaft.

[0005] Therefore, a novel crankshaft center hole chamfering and cutting device is proposed to address the above problems. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a crankshaft center hole chamfering and cutting device to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a crankshaft center hole chamfering and cutting device, comprising a base, a mounting frame, a deburring tool, and a fixing plate. The mounting frame is mounted above the base, and a lead screw is mounted on the top of the mounting frame. A wheel is mounted at one end of the lead screw, and a crank handle is mounted on one side of the wheel. A mounting plate is mounted at the end of the lead screw away from the wheel, and multiple fixing rods are mounted on one side of the mounting plate. A connecting shaft is mounted on one side of each fixing rod, and each connecting shaft is connected to one end of a connecting plate. The other end of each connecting plate is connected to a clamping block via a connecting shaft, and each clamping block is located within a limiting groove. The limiting groove is formed within a limiting plate, and a fixing plate is mounted at the bottom of the limiting plate. A crankshaft is mounted on one side of each clamping block, and a first support frame is mounted in the middle of the crankshaft. The crankshaft is located away from the first support frame. A second support frame is installed at one end of the base. A cylinder is installed on the side of the base away from the mounting frame, and a sliding plate is installed at the output end of the cylinder. A first spring is installed on one side of the sliding plate, and a fixing block is installed on the other side of the first spring. A support plate is installed on the side of the sliding plate away from the first spring, and a motor is installed on the top of the support plate. A rotating shaft is installed at the output end of the motor, and a sliding groove is opened inside the rotating shaft. A second spring is installed at the end of the sliding groove away from the motor, and a limit rod is installed at the other end of the second spring. A chamfering tool is installed on the side of the limit rod close to the second spring, and a chamfering head is installed at one end of the chamfering tool. A burr tool is installed at the end of the rotating shaft away from the motor, and a burr knife is installed at the other end of the burr tool. Sandpaper is installed on the side of the burr knife away from the burr tool, and a brush is installed on one side of the sandpaper.

[0008] Preferably, the limiting plate has three limiting grooves arranged in a circular array with the center of the limiting plate as the center, and each clamping block passes through one limiting groove.

[0009] Preferably, a cylindrical sliding groove is provided inside the rotating shaft, and the diameter of the chamfering tool bar is smaller than that of the sliding groove, and the chamfering tool bar and the sliding groove constitute a sliding structure.

[0010] Preferably, the mounting plate, fixing rod, clamping block, connecting plate, limiting plate and connecting shaft form a clamping mechanism, and the two ends of each connecting plate are respectively connected to the fixing rod and the clamping block through the connecting shaft.

[0011] Preferably, a first support frame and a second support frame are fixed below the crankshaft, and both the first support frame and the second support frame are vertically installed on the top of the base.

[0012] Preferably, a cylinder is installed on one side of the sliding plate and a first spring is installed on the other side, and the sliding plate, the cylinder and the first spring constitute a reset structure.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. Compared with the prior art, the crankshaft center hole chamfering and cutting device cleans the crankshaft center hole after chamfering and cutting by installing a burr cutter. The burr cutter is equipped with sandpaper and a brush, which can better clean the crankshaft center hole.

[0015] 2. Compared with the prior art, this crankshaft center hole chamfering and cutting device uses a mounting plate and a fixing rod to press three circumferentially distributed clamping blocks toward the center, and the contact surface between the clamping blocks and the crankshaft is arc-shaped, which can better position and clamp. Attached Figure Description

[0016] Figure 1 This is a front structural diagram of the present invention.

[0017] Figure 2 This is a partial structural diagram of the limiting disc of this utility model.

[0018] Figure 3 This is a schematic diagram of the rotating shaft of this utility model.

[0019] Figure 4 This is a partial structural diagram of the burr blade of this utility model;

[0020] Figure 5 This is a partial structural diagram of the connecting shaft of this utility model.

[0021] The attached diagram is labeled as follows: 1. Base; 2. Mounting bracket; 3. Wheel; 4. Lead screw; 5. Handle; 6. Mounting plate; 7. Fixing rod; 8. Clamping block; 9. Crankshaft; 10. Chamfering tool holder; 11. Deburring tool holder; 12. Sliding plate; 13. Motor; 14. Support plate; 15. Cylinder; 16. Connecting plate; 17. Limiting plate; 18. First support frame; 19. Second support frame; 20. Deburring tool; 21. First spring; 22. Second spring; 23. Limiting rod; 24. Sliding groove; 25. Fixing nail; 26. Sandpaper; 27. Brush; 28. Connecting shaft; 29. ​​Rotating shaft; 30. Chamfering head; 31. Fixing block; 32. Limiting groove; 33. Fixing plate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0023] Example 1

[0024] As attached Figures 1 to 5The crankshaft center hole chamfering cutting device shown includes a base 1, a mounting bracket 2, a wheel 3, a lead screw 4, a crank handle 5, a mounting plate 6, a fixing rod 7, a clamping block 8, a crankshaft 9, a chamfering cutter 10, a deburring cutter 11, a sliding plate 12, a motor 13, a support plate 14, a cylinder 15, a connecting plate 16, a limiting plate 17, a first support frame 18, a second support frame 19, a deburring cutter 20, a first spring 21, a second spring 22, a limiting rod 23, a sliding groove 24, a fixing pin 25, sandpaper 26, a brush 27, a connecting shaft 28, a rotating shaft 29, a chamfering cutter head 30, a fixing block 31, and a limiting groove 32. The mounting plate 33 is characterized in that: a mounting bracket 2 is installed above the base 1, and a lead screw 4 is installed on the top of the mounting bracket 2. A wheel 3 is installed at one end of the lead screw 4, and a crank 5 is installed on one side of the wheel 3. A mounting plate 6 is installed at the end of the lead screw 4 away from the wheel 3, and a plurality of fixing rods 7 are installed on one side of the mounting plate 6. A connecting shaft 28 is installed on one side of each fixing rod 7, and each connecting shaft 28 is connected to one end of a connecting plate 16. The other end of each connecting plate 16 is connected to a clamping block 8 through the connecting shaft 28, and each clamping block 8 is located in a limiting groove 32, which is formed in a limiting plate. Inside 17, a fixing plate is installed at the bottom of the limiting plate 17, a crankshaft 9 is installed on one side of the clamping block 8, a first support frame 18 is installed in the middle of the crankshaft 9, and a second support frame 19 is installed at the end of the crankshaft 9 away from the first support frame 18. A cylinder 15 is installed on the side of the base 1 away from the mounting frame 2, and a sliding plate 12 is installed at the output end of the cylinder 15. A first spring 21 is installed on one side of the sliding plate 12, and a fixing block 31 is installed on the other side of the first spring 21. A support plate 14 is installed on the side of the sliding plate 12 away from the first spring 21, and a motor 13 is installed on the top of the support plate 14. The output of the motor 13... A rotating shaft 29 is installed at the output end, and a sliding groove 24 is opened inside the rotating shaft 29. A second spring 22 is installed at the end of the sliding groove 24 away from the motor 13, and a limit rod 23 is installed at the other end of the second spring 22. A chamfering tool 10 is installed on the side of the limit rod 23 close to the second spring 22, and a chamfering head 30 is installed at one end of the chamfering tool 10. A burr tool 11 is installed at the end of the rotating shaft 29 away from the motor 13, and a burr cutter 20 is installed at the other end of the burr tool 11. Sandpaper 26 is installed on the side of the burr cutter 20 away from the burr tool 11, and a brush 27 is installed on the side of the sandpaper 26.

[0025] Example 2

[0026] Based on Example 1, the solution in Example 1 will be further described in detail below with reference to the specific working method, such as... Figures 1 to 5 As shown below, see details:

[0027] In a preferred embodiment, three limiting grooves 32 are formed inside the limiting plate 17 in a circular array with the center of the limiting plate 17 as the center. Multiple fixing rods 7 are fixed on one side of the mounting plate 6. The ends of the multiple fixing rods 7 are connected to the connecting shafts 28, and each clamping block 8 passes through a limiting groove 32.

[0028] In a preferred embodiment, a cylindrical sliding groove 24 is provided inside the rotating shaft 29, and the diameter of the chamfering tool 10 is smaller than that of the sliding groove 24. The chamfering tool 10 and the sliding groove 24 form a sliding structure. A retractable second spring 22 is installed in the sliding groove 24. One end of the second spring 22 is fixed to 23, and 10 is also fixed to 23. After 9 is chamfered, the worker moves 23 to make 23 leave the limiting groove, 22 releases pressure, pushes 23 to move, and 23 drives 10 to move backward, so as to achieve the purpose of retracting 10.

[0029] In a preferred embodiment, the mounting plate 6, fixing rod 7, clamping block 8, connecting plate 16, limiting plate 17, and connecting shaft 28 form a clamping mechanism. Each end of the connecting plate 16 is connected to the fixing rod 7 and the clamping block 8 respectively through the connecting shaft 28. The wheel 3 moves backward, thereby driving the mounting plate 6 to move backward, so that multiple fixing rods 7 pull multiple connecting plates 16, thereby causing multiple clamping blocks 8 to move towards the center along the limiting groove 32, thereby achieving precise positioning and fastening of the crankshaft 9.

[0030] In a preferred embodiment, a first support frame 18 and a second support frame 19 are fixed below the crankshaft 9, and both the first support frame 18 and the second support frame 19 are vertically installed on the top of the base 1 and supported by the first support frame 18 and the second support frame 19, so that the crankshaft 9 is tightly fixed and will not be unstable during cutting.

[0031] In a preferred embodiment, a cylinder 15 is installed on one side of the sliding plate 12 and a first spring 21 is installed on the other side. The sliding plate 12, the cylinder 15 and the first spring 21 constitute a reset structure. The cylinder 15 installed above the base 1 can push the sliding plate 12. The first spring 21 is installed on the side of the sliding plate 12 away from the cylinder 15 to reset the sliding plate 12.

[0032] The working process of this utility model is as follows: The mounting bracket 2 is fixed on the base 1, and the lead screw 4 is installed on the mounting bracket 2. By rotating the wheel 3, the lead screw rotates, and the lead screw 4 drives the mounting plate 6 to move backward. A plurality of fixing rods 7 are fixed on one side of the mounting plate 6. The ends of the plurality of fixing rods 7 are all connected to the connecting shafts 28. The two ends of each connecting plate 16 are respectively connected to the fixing rods 7 and the clamping blocks 8 through the connecting shafts 28. Each clamping block 8 passes through the limiting groove 32. The plurality of limiting grooves 32 are opened on the limiting plate. The crankshaft 9 is precisely positioned and secured by a circular array centered on a central circle 17. When the crankshaft 9 is rotated, it moves backward, thereby causing the mounting plate 6 to move backward. This causes multiple fixing rods 7 to pull multiple connecting plates 16, which in turn causes multiple clamping blocks 8 to move along the limiting groove 32 towards the center. This achieves precise positioning and securing of the crankshaft 9. After the three clamping blocks clamp one end of the crankshaft 9, it is then supported by the first support frame 18 and the second support frame 19, thus securing the crankshaft 9 tightly.

[0033] A support plate 14 is fixed to the side of the base 1 away from the clamping device, where a sliding plate 12 is installed. A motor 13 is installed on the top of the support plate 14, and the output end of the motor 13 is connected to a rotating shaft 29. A sliding groove 24 is opened inside the rotating shaft 29, and a retractable second spring 22 is installed in the sliding groove 24. One end of the second spring 22 is fixed to 23, and 10 is also fixed to 23. After 9 is chamfered, the worker moves 23 so that 23 leaves the limiting groove, 22 releases pressure, pushes 23 to move, and 23 drives 10 to move backward, achieving retraction. The purpose of 10 is that after 10 is shrunken, many burrs will remain inside the center hole of 9. At this time, 20 on 11 outside 10 will polish the inside of the center hole of 9. 20 has 26 and 27 installed on its cutting surface. 26 polishes the inside of the center hole, and 27 can clean the debris inside the center hole. A cylinder 15 is installed above the base 1 to push the sliding plate 12. A first spring 21 is installed on the side of the sliding plate 12 away from the cylinder 15 to reset the sliding plate 12. The above is the working principle of this crankshaft center hole chamfering cutting device.

Claims

1. A crankshaft center hole chamfering and cutting device, comprising a base (1), a mounting bracket (2), a deburring tool (11), and a fixing plate (33), characterized in that: A mounting bracket (2) is installed above the base (1), and a lead screw (4) is installed on the top of the mounting bracket (2). A wheel (3) is installed at one end of the lead screw (4), and a crank (5) is installed on one side of the wheel (3). A mounting plate (6) is installed at the end of the lead screw (4) away from the wheel (3), and multiple fixing rods (7) are installed on one side of the mounting plate (6). A connecting shaft (28) is installed on one side of each fixing rod (7), and each connecting shaft (28) is connected to one end of a connecting plate (16). The other end of each connecting plate (16) is connected to a clamping block via the connecting shaft (28). 8), and each clamping block (8) is located in the limiting groove (32), the limiting groove (32) is opened in the limiting plate (17), and the bottom of the limiting plate (17) is equipped with a fixing plate. A crankshaft (9) is installed on one side of the clamping block (8), and a first support frame (18) is installed in the middle of the crankshaft (9), and a second support frame (19) is installed at the end of the crankshaft (9) away from the first support frame (18). A cylinder (15) is installed on the side of the base (1) away from the mounting frame (2), and a sliding plate (12) is installed at the output end of the cylinder (15). A first spring (2) is installed on one side of the sliding plate (12). 1), and a fixing block (31) is installed on the other side of the first spring (21). A support plate (14) is installed on the side of the sliding plate (12) away from the first spring (21). A motor (13) is installed on the top of the support plate (14). A rotating shaft (29) is installed at the output end of the motor (13). A sliding groove (24) is opened inside the rotating shaft (29). A second spring (22) is installed at the end of the sliding groove (24) away from the motor (13). A limit rod (23) is installed at the other end of the second spring (22). A chamfer is installed on the side of the limit rod (23) close to the second spring (22). A chamfering tool holder (10) is provided, and a chamfering head (30) is installed at one end of the chamfering tool holder (10). A burr tool holder (11) is installed at the end of the rotating shaft (29) away from the motor (13), and a burr cutter (20) is installed at the other end of the burr tool holder (11). A sandpaper (26) is installed on the side of the burr cutter (20) away from the burr tool holder (11), and a brush (27) is installed on the side of the sandpaper (26). A cylinder (15) is installed on one side of the sliding plate (12), and a first spring (21) is installed on the other side. The sliding plate (12), the cylinder (15), and the first spring (21) constitute a reset structure.

2. The crankshaft center hole chamfering and cutting device according to claim 1, characterized in that: The limiting disk (17) has three limiting grooves (32) arranged in a circular array with the center of the limiting disk (17) as the center, and each clamping block (8) passes through a limiting groove (32).

3. The crankshaft center hole chamfering and cutting device according to claim 2, characterized in that: The rotating shaft (29) has a cylindrical sliding groove (24) inside, and the diameter of the chamfering tool (10) is smaller than that of the sliding groove (24). The chamfering tool (10) and the sliding groove (24) constitute a sliding structure.

4. The crankshaft center hole chamfering and cutting device according to claim 3, characterized in that: The mounting plate (6), fixing rod (7), clamping block (8), connecting plate (16), limiting plate (17) and connecting shaft (28) form a clamping mechanism, and the two ends of each connecting plate (16) are connected to the fixing rod (7) and clamping block (8) respectively through the connecting shaft (28).

5. The crankshaft center hole chamfering and cutting device according to claim 4, characterized in that: The crankshaft (9) is fixed with a first support frame (18) and a second support frame (19) below it, and both the first support frame (18) and the second support frame (19) are vertically installed on the top of the base (1).

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