Crankshaft with adjustable connecting rod shaft for compressor and use method of crankshaft

Abstract

The invention discloses a crankshaft with an adjustable connecting rod shaft for a compressor and a using method of the crankshaft, and belongs to the technical field of compressor crankshafts. The crankshaft with the adjustable connecting rod shaft for the compressor comprises a transmission crankshaft and a linkage crankshaft, one end of the transmission crankshaft is provided with an input end, the other end of the transmission crankshaft is provided with an output end, the linkage crankshaft is connected with the output end of the transmission crankshaft, and a gear sleeve is arranged on the inner side of the input end. In order to solve the problem that when a crankshaft is used, the motion trail of the crankshaft slightly changes as time goes on, deviation exists between the crankshaft and a differential gear at the moment, and therefore the meshing precision of the crankshaft and the differential gear is affected, a separation lantern ring and a rear separation lantern ring are separated under sliding of a concentric connecting rod; at the moment, the transmission crankshaft and the linkage crankshaft can continue to rotate under the influence of inertia and centrifugal force, but cannot rotate synchronously, and therefore differential operation is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of compressor crankshafts, in particular to a crankshaft with an adjustable connecting rod shaft for a compressor and a use method thereof. Background Art

[0002] The crankshaft of the compressor is one of the main components of the piston compressor, transmitting all the power of the compressor. The main function of the crankshaft is to change the rotational motion of the motor into the reciprocating linear motion of the piston through the connecting rod, thereby realizing the operation of the piston compressor;

[0003] A Chinese patent with announcement number CN212867821U discloses a compressor crankshaft, which is provided as two separate parts. The eccentric crankshaft body can be produced with a constant size, and the eccentric shaft is produced in a personalized manner. When actually needed, the two parts can be assembled into compressor crankshafts with different eccentricities by matching and connecting the two parts through the mounting part and the mounting groove, thereby greatly saving manufacturing costs and greatly facilitating the assembly of the crankshaft connecting rod mechanism in the compressor without the need for a crescent groove.

[0004] In the above patent, the crankshaft can only achieve speed change and stop operation through the added differential gear. When the crankshaft is in use, the movement trajectory of the crankshaft itself will change slightly over time. At this time, there will be a deviation between the crankshaft and the differential gear, thereby affecting the meshing accuracy of the two. Summary of the invention

[0005] The purpose of the present invention is to provide a crankshaft with an adjustable connecting rod shaft for a compressor and a method of using the same. After the front separation ring and the rear separation ring are separated under the sliding of the concentric connecting rod, the power of the transmission crankshaft cannot be transmitted to the linkage crankshaft through the adapter sleeve. At this time, the transmission crankshaft and the linkage crankshaft can continue to rotate under the influence of inertia and centrifugal force, but the two will not maintain synchronous rotation, thereby realizing differential operation and solving the problems in the prior art.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: A crankshaft with an adjustable connecting rod shaft for a compressor, comprising a transmission crankshaft and a linkage crankshaft, wherein an input end is arranged at one end of the transmission crankshaft, and an output end is arranged at the other end of the transmission crankshaft, wherein the linkage crankshaft is connected to the output end of the transmission crankshaft, a gear sleeve is arranged on the inner side of the input end, and a transmission pulley is arranged on the outer side of the input end, wherein the transmission pulley and the gear sleeve are arranged as an integrated structure, wherein the crankshaft comprises a balancing block and a journal, wherein the balancing block is arranged between the journals, wherein the balancing block is rotatably connected to the journals, and a bearing sleeve is arranged between the balancing blocks, and the bearing sleeve is installed on the outer side of the journals.

[0007] Preferably, a lubricating oil hole is provided on the outer surface of the bearing sleeve, and the lubricating oil hole passes through the bearing sleeve and extends to the surface of the shaft neck. A counterweight block is provided on the outer side of the balance block, and the counterweight block is arranged in a fan-shaped structure. The counterweight block is connected to the balance block by bolts. A shaft rod is provided at one end of the balance block, and the shaft rod is fixedly connected to the balance block.

[0008] Preferably, a lubricating oil hole is provided on the outer surface of the bearing sleeve, and the lubricating oil hole passes through the bearing sleeve and extends to the surface of the shaft neck. A counterweight block is provided on the outer side of the balance block, and the counterweight block is arranged in a fan-shaped structure. The counterweight block is connected to the balance block by bolts. A shaft rod is provided at one end of the balance block, and the shaft rod is fixedly connected to the balance block.

[0009] Preferably, an integrally formed front wedge plate is provided below the front end butterfly plate, a front end eccentric block is provided below the front wedge plate, the front wedge plate and the front end eccentric block are connected by bolts, a locking end is provided at the other end of the correction swing shaft, a tail end butterfly plate is provided at the locking end and the correction swing shaft, and the tail end butterfly plate is rotatably connected to the correction swing shaft.

[0010] Preferably, an integrally formed tail wedge plate is arranged below the tail end butterfly plate, and a tail end eccentric block is arranged below the tail wedge plate, the tail wedge plate and the tail end eccentric block are connected by bolts, a driving ring sleeve is arranged on the outer side of the locking end, the driving ring sleeve is meshingly connected with the locking end, the locking end and the tail end butterfly plate are arranged as an integral structure, and the front end butterfly plate and the concentric connecting rod are arranged as an integral structure.

[0011] Preferably, the front end butterfly plate is located on one side above the correction swing shaft, and the rear end butterfly plate is located on the other side below the correction swing shaft, the adapter sleeve includes a front separation ring and a rear separation ring, and the outer surface of the concentric connecting rod is provided with a limiting tooth groove, and the front separation ring is slidably connected to the concentric connecting rod through the limiting tooth groove.

[0012] Preferably, a front gear cylinder is provided on the inner side of the front separation ring, a rear gear cylinder is provided on the inner side of the rear separation ring, the rear gear cylinder is meshingly connected with the front gear cylinder, an integrally formed outer gear ring is provided on the outer side of the front gear cylinder, and the rear separation ring is connected to the front butterfly plate through a slot.

[0013] A method for using a crankshaft with an adjustable connecting rod shaft for a compressor comprises the following steps:

[0014] Step 1: Connect the concentric connecting rod to the transmission crankshaft from one side of the output end, extend the concentric connecting rod inward, and then connect and fix the front separation collar at one end of the adapter sleeve to the output end structure;

[0015] Step 2: When the balancing block on the surface of the transmission crankshaft rotates, it can drive the linkage crankshaft to rotate together. The power is transmitted to the correction swing shaft through the front butterfly plate, and then transmitted to the rear butterfly plate by the correction swing shaft, and finally the transmission operation of the locking end is realized;

[0016] Step 3: After the front separation collar and the rear separation collar are separated by the sliding of the concentric connecting rod, the power of the transmission crankshaft cannot be transmitted to the linkage crankshaft through the adapter sleeve.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. In the present invention, the counterweight block can be added according to the rotation dynamics of the crankshaft. Installing the counterweight block on the outside of the balancing block can assist the balancing block in balancing the centrifugal force generated when the crankshaft moves;

[0019] 2. In the present invention, after the front separation ring and the rear separation ring are separated by the sliding of the concentric connecting rod, the power of the transmission crankshaft cannot be transmitted to the linkage crankshaft through the adapter sleeve. At this time, the transmission crankshaft and the linkage crankshaft can continue to rotate under the influence of inertia and centrifugal force, but the two will not maintain synchronous rotation, thereby realizing differential operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the overall front view of the present invention;

[0021] Figure 2 It is a schematic diagram of the transmission crankshaft structure of the present invention;

[0022] Figure 3 It is a schematic diagram of the journal structure of the present invention;

[0023] Figure 4 It is a schematic diagram of the linkage crankshaft structure of the present invention;

[0024] Figure 5 It is a schematic diagram of the exploded structure of the linkage crankshaft of the present invention;

[0025] Figure 6 It is a schematic diagram of the structure of the adapter sleeve of the present invention.

[0026] In the figure: 1, transmission crankshaft; 2, linkage crankshaft; 101, input end; 102, output end; 103, counterweight; 104, balance block; 105, bearing sleeve; 106, journal; 107, shaft; 1011, transmission pulley; 1012, gear sleeve; 1051, lubricating oil hole; 201, concentric connecting rod; 202, adapter sleeve; 203, front butterfly plate; 204 , correction swing shaft; 205, tail end butterfly plate; 206, locking end; 207, driving ring sleeve; 2011, limiting tooth groove; 2021, front separation ring; 2022, front gear cylinder; 2023, outer gear ring; 2024, rear gear cylinder; 2025, rear separation ring; 2031, front end eccentric block; 2032, front wedge plate; 2051, tail end eccentric block; 2052, tail wedge plate. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In order to solve the problem that the crankshaft can only achieve speed change and stop operation through the added differential gear, the crankshaft's own motion trajectory will change slightly over time during use, and there will be a deviation between the crankshaft and the differential gear, thus affecting the meshing accuracy of the two; please refer to Figure 1-6 , this embodiment provides the following technical solutions:

[0029] A crankshaft with an adjustable connecting rod shaft for a compressor comprises a transmission crankshaft 1 and a linkage crankshaft 2. An input end 101 is provided at one end of the transmission crankshaft 1, an output end 102 is provided at the other end of the transmission crankshaft 1, the linkage crankshaft 2 is connected to the output end 102 of the transmission crankshaft 1, a gear sleeve 1012 is provided on the inner side of the input end 101, a transmission pulley 1011 is provided on the outer side of the input end 101, the transmission pulley 1011 and the gear sleeve 1012 are provided as an integrated structure, the crankshaft comprises a balancing block 104 and a journal 106, the balancing block 104 is provided between the journals 106, the balancing block 104 is rotatably connected to the journal 106, when the crankshaft rotates, the inertial mass of the piston and the connecting rod causes the crankshaft to lose balance, generating a large unbalanced force, the unbalanced force acts on the main journal 106, and increases the load, in order to eliminate the unbalance, it is necessary to Install the balance block 104 to overcome the centrifugal force generated during the rotation of the crankshaft and reduce the load on the main journal 106. A bearing sleeve 105 is arranged between the balance blocks 104. The bearing sleeve 105 is installed on the outside of the journal 106. The outer surface of the bearing sleeve 105 is provided with a lubricating oil hole 1051. The lubricating oil hole 1051 penetrates the bearing sleeve 105 and extends to the surface of the journal 106. A counterweight 103 is arranged on the outside of the balance block 104. The counterweight 103 is arranged in a fan-shaped structure. The counterweight 103 and the balance block 104 are connected by bolts. A shaft rod 107 is arranged at one end of the balance block 104. The shaft rod 107 is fixedly connected to the balance block 104. The counterweight 103 can be added according to the rotation dynamics of the crankshaft. Installing the counterweight 103 on the outside of the balance block 104 can assist the balance block 104 in balancing the centrifugal force generated during the movement of the crankshaft.

[0030] In this embodiment, the concentric connecting rod 201 is connected to the transmission crankshaft 1 from one side of the output end 102, and the concentric connecting rod 201 extends inwardly and then the front separation ring 2021 at one end of the adapter sleeve 202 is connected and fixed to the output end 102 structure. When the balance block 104 on the surface of the transmission crankshaft 1 rotates, it can drive the linkage crankshaft 2 to rotate together. The power is transmitted to the correction swing shaft 204 through the front butterfly plate 203, and then transmitted to the rear butterfly plate 205 by the correction swing shaft 204, and finally the transmission operation of the locking end 206 is realized.

[0031] A concentric connecting rod 201 is provided at one end of the linkage crankshaft 2, and an adapter sleeve 202 is provided on the inner side of the concentric connecting rod 201. The concentric connecting rod 201 extends to the inside of the output end 102, and the adapter sleeve 202 is meshed with the output end 102. A correction swing shaft 204 is provided at one end of the concentric connecting rod 201, and a front end butterfly plate 203 is provided between the correction swing shaft 204 and the concentric connecting rod 201. The correction swing shaft 204 is rotatably connected to the front end butterfly plate 203, and an integrally formed front wedge plate 2032 is provided below the front end butterfly plate 203. The front wedge plate 203 A front eccentric block 2031 is arranged below 32, and a front wedge plate 2032 is connected to the front eccentric block 2031 by bolts. A locking end 206 is arranged at the other end of the correction swing shaft 204, and a tail end butterfly plate 205 is arranged between the locking end 206 and the correction swing shaft 204. The tail end butterfly plate 205 is rotatably connected to the correction swing shaft 204, and the front end butterfly plate 203 and the tail end butterfly plate 205 are in a relative motion state, and the two are staggered with each other. When the tail end butterfly plate 205 moves to the bottom, the front end butterfly plate 203 will move to the highest area, so that During the rotation process, the correction swing shaft 204 can be kept in a balanced state by the two. An integral tail wedge plate 2052 is arranged below the tail end butterfly plate 205, and a tail end eccentric block 2051 is arranged below the tail end wedge plate 2052. The tail wedge plate 2052 is connected to the tail end eccentric block 2051 by bolts. A driving ring sleeve 207 is arranged on the outer side of the locking end 206. The driving ring sleeve 207 is meshed and connected with the locking end 206. The outer locking end 206 can be driven to rotate through the driving ring sleeve 207, thereby transmitting power. The locking end 206 and the tail end butterfly plate 205 are set as an integrated structure, the front end butterfly plate 203 and the concentric connecting rod 201 are set as an integrated structure, the front end butterfly plate 203 is located on one side above the correction swing shaft 204, and the tail end butterfly plate 205 is located on the other side below the correction swing shaft 204. The tail end eccentric block 2051 and the front end eccentric block 2031 can rotate together with the front end butterfly plate 203 and the tail end butterfly plate 205. During the rotation process, they affect the centrifugal steering of the correction swing shaft 204 through their own weight, thereby playing a balancing role;

[0032] In this embodiment, the correction swing shaft 204 can balance its own motion trajectory through the front butterfly plate 203 and the rear butterfly plate 205 at both ends to avoid deflection and deformation when the kinetic energy is transferred from the transmission crankshaft 1 to the linkage crankshaft 2;

[0033] The adapter sleeve 202 includes a front separation ring 2021 and a rear separation ring 2025. The outer surface of the concentric connecting rod 201 is provided with a limited tooth groove 2011. The front separation ring 2021 is slidably connected with the concentric connecting rod 201 through the limited tooth groove 2011. The inner side of the front separation ring 2021 is provided with a front gear cylinder 2022. The inner side of the rear separation ring 2025 is provided with a rear gear cylinder 2024. The rear gear cylinder 2024 is meshed and connected with the front gear cylinder 2022. The outer side of the front gear cylinder 2022 is provided with an integrally formed outer gear ring 2023. The rear separation ring 2025 is connected with the front butterfly plate 203 through a slot.

[0034] In this embodiment, after the front separation ring 2021 and the rear separation ring 2025 are separated by the sliding of the concentric connecting rod 201, the power of the transmission crankshaft 1 cannot be transmitted to the linkage crankshaft 2 through the adapter sleeve 202. At this time, the transmission crankshaft 1 and the linkage crankshaft 2 can continue to rotate under the influence of inertia and centrifugal force, but the two will not maintain synchronous rotation, thereby realizing differential operation.

[0035] Working principle: the concentric connecting rod 201 is connected to the transmission crankshaft 1 from one side of the output end 102, the concentric connecting rod 201 extends inward and then the front separation ring 2021 at one end of the adapter sleeve 202 is connected and fixed to the output end 102 structure, the balance block 104 on the surface of the transmission crankshaft 1 can drive the linkage crankshaft 2 to rotate together when it rotates, the power is transmitted to the correction swing shaft 204 through the front butterfly plate 203, and then transmitted to the rear butterfly plate 205 by the correction swing shaft 204, and finally the transmission operation of the locking end 206 is realized, after the front separation ring 2021 and the rear separation ring 2025 are separated under the sliding of the concentric connecting rod 201, the power of the transmission crankshaft 1 cannot be transmitted to the linkage crankshaft 2 through the adapter sleeve 202.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0037] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A crankshaft with an adjustable connecting rod shaft for a compressor, comprising a driving crankshaft (1) and a linkage crankshaft (2), characterized in that: An input end (101) is provided at one end of the transmission crankshaft (1), an output end (102) is provided at the other end of the transmission crankshaft (1), the linkage crankshaft (2) is connected to the output end (102) of the transmission crankshaft (1), a gear sleeve (1012) is provided on the inner side of the input end (101), a transmission pulley (1011) is provided on the outer side of the input end (101), the transmission pulley (1011) and the gear sleeve (1012) are provided as an integrated structure, the crankshaft comprises a balancing block (104) and a journal (106), the balancing block (104) is provided between the journals (106), the balancing block (104) is rotatably connected to the journal (106), a bearing sleeve (105) is provided between the balancing blocks (104), and the bearing sleeve (105) is installed on the outer side of the journal (106).

2. The crankshaft with an adjustable connecting rod shaft for a compressor according to claim 1, characterized in that: The outer surface of the bearing sleeve (105) is provided with a lubricating oil hole (1051), and the lubricating oil hole (1051) passes through the bearing sleeve (105) and extends to the surface of the shaft neck (106). A counterweight block (103) is provided on the outer side of the balancing block (104), and the counterweight block (103) is configured as a fan-shaped structure. The counterweight block (103) is connected to the balancing block (104) by bolts. A shaft rod (107) is provided at one end of the balancing block (104), and the shaft rod (107) is fixedly connected to the balancing block (104).

3. The crankshaft with an adjustable connecting rod shaft for a compressor according to claim 1, characterized in that: A concentric connecting rod (201) is disposed at one end of the linkage crankshaft (2), a transfer sleeve (202) is disposed on the inner side of the concentric connecting rod (201), the concentric connecting rod (201) extends to the inside of the output end (102), the transfer sleeve (202) and the output end (102) are meshed with each other, a correction swing shaft (204) is disposed at one end of the concentric connecting rod (201), a front end butterfly plate (203) is disposed between the correction swing shaft (204) and the concentric connecting rod (201), and the correction swing shaft (204) is rotatably connected to the front end butterfly plate (203).

4. The crankshaft with an adjustable connecting rod shaft for a compressor according to claim 3, characterized in that: An integrally formed front wedge plate (2032) is arranged below the front butterfly plate (203), a front eccentric block (2031) is arranged below the front wedge plate (2032), the front wedge plate (2032) and the front eccentric block (2031) are connected by bolts, a locking end (206) is arranged at the other end of the correction swing shaft (204), a tail butterfly plate (205) is arranged between the locking end (206) and the correction swing shaft (204), and the tail butterfly plate (205) is rotatably connected to the correction swing shaft (204).

5. The crankshaft with an adjustable connecting rod shaft for a compressor according to claim 4, characterized in that: An integrally formed tail wedge plate (2052) is arranged below the tail end butterfly plate (2055), and a tail end eccentric block (2051) is arranged below the tail wedge plate (2052). The tail wedge plate (2052) and the tail end eccentric block (2051) are connected by bolts. A driving ring sleeve (207) is arranged on the outer side of the locking end (206), and the driving ring sleeve (207) is meshedly connected with the locking end (206). The locking end (206) and the tail end butterfly plate (205) are arranged as an integral structure, and the front end butterfly plate (203) and the concentric connecting rod (201) are arranged as an integral structure.

6. The crankshaft with an adjustable connecting rod shaft for a compressor according to claim 5, characterized in that: The front butterfly plate (203) is located on one side above the correction swing shaft (204), and the rear butterfly plate (205) is located on the other side below the correction swing shaft (204). The adapter sleeve (202) includes a front separation ring (2021) and a rear separation ring (2025). The outer surface of the concentric connecting rod (201) is provided with a limiting tooth groove (2011), and the front separation ring (2021) is slidably connected to the concentric connecting rod (201) via the limiting tooth groove (2011).

7. The crankshaft with an adjustable connecting rod shaft for a compressor according to claim 6, characterized in that: A front gear cylinder (2022) is arranged on the inner side of the front separation ring (2021), a rear gear cylinder (2024) is arranged on the inner side of the rear separation ring (2025), the rear gear cylinder (2024) is meshingly connected with the front gear cylinder (2022), an integrally formed outer gear ring (2023) is arranged on the outer side of the front gear cylinder (2022), and the rear separation ring (2025) is connected to the front butterfly plate (203) via a slot.

8. A method for using a crankshaft with an adjustable connecting rod shaft for a compressor, which is implemented based on the crankshaft with an adjustable connecting rod shaft for a compressor according to claim 7, characterized in that: The steps include: Step 1: Connect the concentric connecting rod (201) from one side of the output end (102) to the transmission crankshaft (1), extend the concentric connecting rod (201) inward, and then connect and fix the front separation ring (2021) at one end of the adapter sleeve (202) to the output end (102) structure; Step 2: When the balancing block (104) on the surface of the transmission crankshaft (1) rotates, it can drive the linkage crankshaft (2) to rotate together, and the power is transmitted to the correction swing shaft (204) through the front butterfly plate (203), and then transmitted to the rear butterfly plate (205) by the correction swing shaft (204), and finally the transmission operation of the locking end (206) is realized; Step 3: After the front separation ring (2021) and the rear separation ring (2025) are separated by the sliding of the concentric connecting rod (201), the power of the transmission crankshaft (1) cannot be transmitted to the linkage crankshaft (2) through the adapter sleeve (202).

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