Light crankshaft

Abstract

The utility model relates to the field of crankshafts, and discloses a light crankshaft which comprises a crankshaft flywheel end, a crankshaft transmission end, a main shaft, a transmission mechanism, a piston and a piston rod, the main shaft is arranged on one side of the crankshaft flywheel end, the transmission mechanism is arranged on one side of the main shaft, and the piston rod is arranged on the top of the transmission mechanism. A crankshaft transmission end is arranged on one side of the transmission mechanism, a piston is arranged at the top of the piston rod, and a dismounting device used for conveniently replacing the transmission mechanism is arranged at one end of the main shaft; the crankshaft is compact and reasonable in structural design, the problem that an existing crankshaft is generally in an integrated shape, and once a certain section of the crankshaft is damaged, the whole crankshaft needs to be replaced is solved, and waste of crankshaft materials is reduced.

Description

Technical Field

[0001] The utility model relates to the field of crankshafts, in particular to a light crankshaft. Background Art

[0002] A light crankshaft is a shaft part with a large diameter and a short length. Its core function is to convert the up and down reciprocating motion of the piston into continuous rotational motion, thereby driving the movement of automobiles, mechanical equipment, etc. The crankshaft is widely used in many fields, especially in the fields of compressors and internal combustion engines. It is its core component. Every internal combustion engine or compressor needs to be equipped with a crankshaft. During the manufacturing process, the crankshaft undergoes a series of fine process treatments, such as external milling, grinding and fillet rolling of the main journal and connecting rod neck. These processes are aimed at improving the machining accuracy, service life and fatigue strength of the crankshaft. In addition, the rough machining method of the crankshaft is also constantly improving, from the initial single-tool turning to the composite machining process, in order to meet the machining requirements of different crankshaft lengths and blank allowances. As a key mechanical part, the light crankshaft is widely used in many fields such as automobiles, machinery, and petrochemicals. With the improvement of manufacturing technology and the application of new technologies, its market prospects are very broad.

[0003] However, the existing crankshafts are generally in one piece. Once a section of the crankshaft is damaged, the entire crankshaft needs to be replaced, which makes the entire damaged crankshaft scrapped, resulting in a waste of crankshaft materials. For this reason, we propose a lightweight crankshaft. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the utility model provides a light crankshaft to solve the above-mentioned problems.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a light crankshaft, including a crankshaft flywheel end, a crankshaft transmission end, a main shaft, a transmission mechanism, a piston and a piston rod, wherein a main shaft is arranged on one side of the crankshaft flywheel end, a transmission mechanism is arranged on one side of the main shaft, a piston rod is arranged on the top of the transmission mechanism, and a crankshaft transmission end is arranged on one side of the transmission mechanism, a piston is arranged on the top of the piston rod, and further comprising:

[0008] A disassembly device for facilitating replacement of the transmission mechanism is provided at one end of the main shaft;

[0009] One end of the transmission mechanism is provided with a bearing device for reducing friction damage to the piston rod.

[0010] Preferably, a total of five main shafts are arranged between the flywheel end of the crankshaft and the transmission end of the crankshaft, and four transmission mechanisms are arranged between the five main shafts, and four disassembly devices are arranged on one side of one end of the four main shafts corresponding to the four transmission mechanisms, and four piston rods are movably connected to the tops of the four transmission mechanisms, and four pistons are movably connected to the tops of the four piston rods.

[0011] Preferably, the four transmission mechanisms are each composed of two transmission shaft arms and a transmission shaft rod, a transmission shaft rod is fixedly connected between the two transmission shaft arms, and the bottom end of the piston rod is movably connected to the outer surface of the transmission shaft rod corresponding to the two transmission shaft arms, and a main shaft is fixedly connected to one side of the two transmission shaft arms, and a bearing device is arranged between the four transmission shaft rods and the four piston rods.

[0012] Preferably, the four disassembly devices all include an installation groove, a clamping tube, a mounting tube, a fixing rod, a bolt and a pushing block. An installation groove is opened at one end of the main shaft, the interior of the installation groove is fixedly connected to the clamping tube, one side of the clamping tube is movably connected to the mounting tube, the interior of the mounting tube is movably connected to the pushing block, one end of the pushing block is fixedly connected to the bolt, and the outer surface of the mounting tube is fixedly connected to the fixing rod.

[0013] Preferably, eight fixing rods are provided, and the eight fixing rods are arranged in a ring on the outer surface of the mounting tube, and the inner wall of the main shaft is provided with eight movable grooves corresponding to the eight fixing rods, and the eight fixing rods are movably connected inside the eight movable grooves.

[0014] Preferably, the pushing block is flat-conical, and one end of the pushing block is movably connected to the inside of the clamping tube, and one end of the mounting tube is movably connected between the clamping tube and the inner wall of the main shaft, and one end of the mounting tube is fixedly connected to one side of the transmission shaft arm, and one end of the bolt passes through the transmission shaft arm and is fixedly connected to the pushing block.

[0015] Preferably, the four bearing devices each include a bearing inner ring, a bearing outer ring and rolling steel balls, the outer surface of the transmission shaft is movably connected to the bearing inner ring, the outer surface of the bearing inner ring is movably connected to the bearing outer ring, rolling steel balls are movably connected between the bearing outer ring and the bearing inner ring, and the outer surface of the bearing outer ring is movably connected to the bottom of the piston rod.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the utility model provides a light crankshaft with the following beneficial effects:

[0018] 1. The light crankshaft drives the outer ring of the bearing to rotate by the swing amplitude of the piston rod during operation, so that the outer ring of the bearing drives the rolling steel balls to roll on the inner ring of the bearing, so that the piston rod can swing and rotate on the transmission shaft, thereby reducing the friction, heat and wear caused by the swing amplitude of the piston rod on the piston, and preventing the piston and the transmission shaft from being damaged due to heat or severe wear and becoming unusable.

[0019] 2. The light crankshaft pushes the pushing block to expand the spring piece end of the clamping tube by rotating the bolt, so that the spring piece end of the clamping tube and the inner wall of the main shaft tightly clamp the mounting tube, so that the main shaft can drive the transmission mechanism to rotate through the mounting tube, and then the mounting tube is prevented from slipping inside the mounting groove by fixing the rod and the mounting groove of the main shaft, thereby realizing the maintenance and replacement function of a certain section of the transmission mechanism of the crankshaft, avoiding the replacement of the entire crankshaft and reducing the waste of crankshaft materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the separation of the crankshaft of the utility model;

[0022] Figure 3 This is a schematic diagram of the cross-sectional structure of the disassembly device of the utility model;

[0023] Figure 4 It is a schematic diagram of the cross-sectional structure of the bearing device of the utility model.

[0024] In the figure: 1. flywheel end of crankshaft; 2. drive end of crankshaft; 3. main shaft; 4. transmission mechanism; 401. transmission shaft arm; 402. transmission shaft rod; 5. piston; 6. piston rod; 7. mounting groove; 8. clamping tube; 9. mounting tube; 10. fixing rod; 11. bolt; 12. push block; 13. bearing inner ring; 14. bearing outer ring; 15. rolling steel ball. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-4A light crankshaft includes a crankshaft flywheel end 1, a crankshaft transmission end 2, a main shaft 3, a transmission mechanism 4, a piston 5 and a piston rod 6. The main shaft 3 is arranged on one side of the crankshaft flywheel end 1, the transmission mechanism 4 is arranged on one side of the main shaft 3, the piston rod 6 is arranged on the top of the transmission mechanism 4, and the crankshaft transmission end 2 is arranged on one side of the transmission mechanism 4, and the piston 5 is arranged on the top of the piston rod 6, and also includes:

[0027] One end of the main shaft 3 is provided with a disassembly device for facilitating replacement of the transmission mechanism 4;

[0028] One end of the transmission mechanism 4 is provided with a bearing device for reducing friction damage to the piston rod 6 .

[0029] Furthermore, a total of five main shafts 3 are arranged between the crankshaft flywheel end 1 and the crankshaft transmission end 2, and four transmission mechanisms 4 are arranged between the five main shafts 3, and four disassembly devices are arranged on one side of the four transmission mechanisms 4 corresponding to one end of the four main shafts 3, and four piston rods 6 are movably connected to the tops of the four transmission mechanisms 4, and four pistons 5 are movably connected to the tops of the four piston rods 6.

[0030] Furthermore, the four transmission mechanisms 4 are each composed of two transmission shaft arms 401 and a transmission shaft rod 402, the transmission shaft rod 402 is fixedly connected between the two transmission shaft arms 401, and the bottom end of the piston rod 6 is movably connected to the outer surface of the transmission shaft rod 402 corresponding to the two transmission shaft arms 401, and one side of the two transmission shaft arms 401 is respectively fixedly connected with a main shaft 3, and a bearing device is arranged between the four transmission shaft rods 402 and the four piston rods 6.

[0031] Furthermore, the four disassembly devices each include an installation groove 7, a clamping tube 8, a mounting tube 9, a fixing rod 10, a bolt 11 and a pushing block 12. An installation groove 7 is opened at one end of the main shaft 3, the interior of the installation groove 7 is fixedly connected with the clamping tube 8, one side of the clamping tube 8 is movably connected with the mounting tube 9, the interior of the mounting tube 9 is movably connected with a pushing block 12, one end of the pushing block 12 is fixedly connected with the bolt 11, and the outer surface of the mounting tube 9 is fixedly connected with the fixing rod 10.

[0032] Furthermore, eight fixing rods 10 are provided, and the eight fixing rods 10 are arranged in a ring on the outer surface of the mounting tube 9, and the inner wall of the main shaft 3 is provided with eight movable grooves corresponding to the eight fixing rods 10, and the eight fixing rods 10 are movably connected inside the eight movable grooves.

[0033] Furthermore, the pushing block 12 is flat-conical, and one end of the pushing block 12 is movably connected to the inside of the clamping tube 8, and one end of the mounting tube 9 is movably connected between the clamping tube 8 and the inner wall of the main shaft 3, and one end of the mounting tube 9 is fixedly connected to one side of the transmission shaft arm 401, and one end of the bolt 11 passes through the transmission shaft arm 401 and is fixedly connected to the pushing block 12.

[0034] Furthermore, the four bearing devices each include a bearing inner ring 13, a bearing outer ring 14 and rolling steel balls 15; the outer surface of the transmission shaft 402 is movably connected to the bearing inner ring 13; the outer surface of the bearing inner ring 13 is movably connected to the bearing outer ring 14; the rolling steel balls 15 are movably connected between the bearing outer ring 14 and the bearing inner ring 13; and the outer surface of the bearing outer ring 14 is movably connected to the bottom of the piston rod 6.

[0035] Working principle: When the crankshaft needs to work, the main shaft 3 is first driven to rotate through the crankshaft flywheel end 1 and the crankshaft transmission end 2, and then the transmission mechanism 4 is driven to rotate the rod through the main shaft 3, so that the transmission mechanism 4 drives the piston 5 to move up and down through the piston rod 6 to work. When the transmission mechanism 4 drives the piston rod 6 to work, the swing amplitude obtained by the piston rod 6 during work drives the rotation of the bearing outer ring 14, so that the bearing outer ring 14 drives the rolling steel ball 15 to roll on the bearing inner ring 13, so that the piston rod 6 can swing and rotate on the transmission shaft 402, thereby reducing the frictional heat and wear caused by the swing amplitude of the piston rod 6 on the piston 5, and preventing the piston 5 and the transmission shaft 402 from being damaged due to heat or severe wear and becoming unusable.

[0036] When a section of the transmission mechanism 4 on the crankshaft is damaged and needs to be replaced, the screw head end of the bolt 11 is first rotated with a wrench, so that the threaded rod end of the bolt 11 drives the push block 12 to move toward the transmission shaft arm 401, so that the push block 12 no longer squeezes the spring end of the clamping tube 8, so that the spring end of the clamping tube 8 rebounds inward, so that the mounting tube 9 and the fixing rod 10 can be pulled out from the mounting groove 7, so that the damaged transmission mechanism 4 and the main shaft 3 are in a separated state, and then the replaced transmission mechanism 4 is inserted into the mounting groove through the mounting tube 9. 7, so that the fixing rod 10 is inserted into the mounting groove of the main shaft 3, and then the pushing block 12 is pushed by rotating the bolt 11 to expand the spring piece end of the clamping tube 8, so that the spring piece end of the clamping tube 8 and the inner wall of the main shaft 3 tightly clamp the mounting tube 9, so that the main shaft 3 can drive the transmission mechanism 4 to rotate through the mounting tube 9, and then the fixing rod 10 and the mounting groove of the main shaft 3 are used to prevent the mounting tube 9 from slipping inside the mounting groove 7, thereby realizing the maintenance and replacement function of a certain section of the transmission mechanism 4 of the crankshaft, avoiding the replacement of the entire crankshaft, and reducing the waste of crankshaft materials.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A light crankshaft, comprising a crankshaft flywheel end (1), a crankshaft transmission end (2), a main shaft (3), a transmission mechanism (4), a piston (5) and a piston rod (6), wherein the main shaft (3) is arranged on one side of the crankshaft flywheel end (1), the transmission mechanism (4) is arranged on one side of the main shaft (3), the piston rod (6) is arranged on the top of the transmission mechanism (4), and the crankshaft transmission end (2) is arranged on one side of the transmission mechanism (4), and the piston (5) is arranged on the top of the piston rod (6), characterized in that: Also includes: One end of the main shaft (3) is provided with a disassembly device for facilitating replacement of the transmission mechanism (4); One end of the transmission mechanism (4) is provided with a bearing device for reducing friction damage to the piston rod (6).

2. A lightweight crankshaft according to claim 1, characterized in that: A total of five main shafts (3) are arranged between the crankshaft flywheel end (1) and the crankshaft transmission end (2), and four transmission mechanisms (4) are arranged between the five main shafts (3), and four disassembly devices are arranged on one side of one end of the four main shafts (3) corresponding to the four transmission mechanisms (4), and four piston rods (6) are movably connected to the tops of the four transmission mechanisms (4), and four pistons (5) are movably connected to the tops of the four piston rods (6).

3. A lightweight crankshaft according to claim 2, characterized in that: The four transmission mechanisms (4) are each composed of two transmission shaft arms (401) and a transmission shaft rod (402); the transmission shaft rod (402) is fixedly connected between the two transmission shaft arms (401); the bottom end of the piston rod (6) is movably connected to the outer surface of the transmission shaft rod (402) corresponding to the two transmission shaft arms (401); one side of the two transmission shaft arms (401) is respectively fixedly connected to a main shaft (3); and a bearing device is provided between the four transmission shaft rods (402) and the four piston rods (6).

4. A lightweight crankshaft according to claim 2, characterized in that: The four disassembly devices all comprise a mounting groove (7), a clamping tube (8), a mounting tube (9), a fixing rod (10), a bolt (11) and a pushing block (12); one end of the main shaft (3) is provided with a mounting groove (7); the inside of the mounting groove (7) is fixedly connected with the clamping tube (8); one side of the clamping tube (8) is movably connected with the mounting tube (9); the inside of the mounting tube (9) is movably connected with the pushing block (12); one end of the pushing block (12) is fixedly connected with the bolt (11); and the outer surface of the mounting tube (9) is fixedly connected with the fixing rod (10).

5. A lightweight crankshaft according to claim 4, characterized in that: There are eight fixing rods (10), and the eight fixing rods (10) are arranged in a ring on the outer surface of the mounting tube (9), and the inner wall of the main shaft (3) is provided with eight movable grooves corresponding to the eight fixing rods (10), and the eight fixing rods (10) are movably connected inside the eight movable grooves.

6. A lightweight crankshaft according to claim 4, characterized in that: The pushing block (12) is in a flat cone shape, and one end of the pushing block (12) is movably connected to the inside of the clamping tube (8), and one end of the mounting tube (9) is movably connected between the clamping tube (8) and the inner wall of the main shaft (3), and one end of the mounting tube (9) is fixedly connected to one side of the transmission shaft arm (401), and one end of the bolt (11) passes through the transmission shaft arm (401) and is fixedly connected to the pushing block (12).

7. A lightweight crankshaft according to claim 3, characterized in that: The four bearing devices all include a bearing inner ring (13), a bearing outer ring (14) and a rolling steel ball (15); the outer surface of the transmission shaft (402) is movably connected to the bearing inner ring (13); the outer surface of the bearing inner ring (13) is movably connected to the bearing outer ring (14); the rolling steel ball (15) is movably connected between the bearing outer ring (14) and the bearing inner ring (13); and the outer surface of the bearing outer ring (14) is movably connected to the bottom of the piston rod (6).

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