CN214247974U - Crank assembly - Google Patents

Crank assembly Download PDF

Info

Publication number
CN214247974U
CN214247974U CN202023106662.7U CN202023106662U CN214247974U CN 214247974 U CN214247974 U CN 214247974U CN 202023106662 U CN202023106662 U CN 202023106662U CN 214247974 U CN214247974 U CN 214247974U
Authority
CN
China
Prior art keywords
crank
connecting rod
groove
rod journal
fastening bolt
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202023106662.7U
Other languages
Chinese (zh)
Inventor
马熙安
李志明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Yusheng Compression Machinery Co ltd
Original Assignee
Shanghai Yusheng Compression Machinery Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Yusheng Compression Machinery Co ltd filed Critical Shanghai Yusheng Compression Machinery Co ltd
Priority to CN202023106662.7U priority Critical patent/CN214247974U/en
Application granted granted Critical
Publication of CN214247974U publication Critical patent/CN214247974U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Abstract

The utility model discloses a crank assembly relates to crank technical field, and it includes front end axle, first crank, second crank and rear end axle, the fixed tip that sets up at the front end axle of first crank, the fixed tip that sets up at the rear end axle of second crank, the interval is provided with a plurality of balancing piece and connecting rod journal between first crank and the second crank, just fixed connection can be dismantled with the balancing piece formation to the connecting rod journal, is close to the one end that corresponding balancing piece was kept away from to two connecting rod journal length directions of first crank and second crank is fixed respectively to be set up on first crank and second crank. The utility model discloses can dismantle fixed connection with connecting rod journal and balancing piece, when the installation connecting rod, only need with the connecting rod major part of drive connecting rod and the rotation piece cover that sets establish on connecting rod journal can, avoid setting up the components of a whole that can function independently of drive connecting rod, and then help improving the structural strength of drive connecting rod self, increase the life of drive connecting rod.

Description

Crank assembly
Technical Field
The utility model belongs to the technical field of the crank throw technique and specifically relates to a crank throw assembly is related to.
Background
The crank throw is the power transmission part of the piston compressor. The piston compressor bears the force transmitted by the connecting rod, converts the force into torque, outputs the torque through the crankshaft, drives other accessories on the engine to work, converts rotary motion into reciprocating motion, and accordingly achieves the work of the piston compressor.
In the prior art, as shown in fig. 3, there is a crank connecting rod structure for a twin-cylinder compressor, which includes a front end shaft 10, a first crank 20, a first connecting rod journal 30, a balance weight 40, a second connecting rod journal 50 and a rear end shaft 60 in sequence, and the crank is integrally cast; all the sleeves are provided with driving connecting rods 70 on the first connecting rod journal 30 and the second connecting rod journal 50, each driving connecting rod 70 comprises a connecting rod big head 701, a connecting rod small head 702 and a rod body 703 connecting the connecting rod big head 701 and the connecting rod small head 702, the connecting rod big head 701 is in split arrangement and comprises a first connecting body 7011 and a second connecting body 7012, the first connecting body 7011 and the second connecting body 7012 are connected through bolts, a journal pin hole 7013 is formed between the first connecting body 7011 and the second connecting body 7012, the connecting rod small head 702 is provided with a piston pin hole 7021, and a rotating bearing bush 80 in split arrangement is embedded in the journal pin hole 7013 in an interference manner.
By adopting the scheme, when the driving connecting rod is installed, the first connecting body and the second connecting body are sequentially sleeved on the journal of the first connecting rod respectively, then the second connecting body is fixed on the first connecting body through a bolt, and the rotating bearing bush in the journal pin hole is in rotating fit with the journal of the first connecting rod; however, in actual operation, the driving connecting rod bears the dynamic load which changes rapidly, and because the crank throw is formed by casting integrally, when the driving connecting rod is connected, the driving connecting rod needs to be arranged in a split mode, the structural strength of the connecting rod is reduced, the service life of the driving connecting rod is influenced, and a part to be improved exists.
SUMMERY OF THE UTILITY MODEL
To the technical problem, the utility model aims to provide a crank assembly can dismantle fixed connection with connecting rod journal and balancing piece, when the installation connecting rod, only need with the connecting rod major part of drive connecting rod and the rotation piece cover that sets establish on the connecting rod journal can, avoid setting up the components of a whole that can function independently of drive connecting rod, and then help improving the structural strength of drive connecting rod self, increase the life of drive connecting rod.
The above technical purpose of the present invention can be achieved by the following technical solutions:
the utility model provides a crank assembly, includes front end axle, first crank, second crank and rear end axle, first crank is fixed to be set up at the tip of front end axle, the fixed tip that sets up at the rear end axle of second crank, the interval is provided with a plurality of balancing piece and connecting rod journal between first crank and the second crank, just connecting rod journal forms detachable fixed connection with the balancing piece, is close to the one end that corresponds the balancing piece was kept away from to two connecting rod journal length direction of first crank and second crank is fixed respectively to be set up on first crank and second crank.
Through adopting above-mentioned technical scheme, in the in-service use, utilize the dismantled fixed connection that forms between balancing piece and the connecting rod axle journal, when installing the drive connecting rod, dismantle the connecting rod axle journal from the balancing piece, at this moment, the staff can directly overlap the big end of connecting rod of drive connecting rod and the rotation piece of setting in the axle journal pinhole on the connecting rod axle journal, then fix the connecting rod axle journal on the balancing piece, just accomplished the installation to the drive connecting rod, the connecting rod big end of drive connecting rod and the rotation piece that sets all need not to be the components of a whole that can function independently setting promptly, help improving the structural strength of drive connecting rod self, and then the life of increment drive connecting rod under the dynamic load of abrupt change.
The present invention may be further configured in a preferred embodiment as: the balance block is provided with an insertion groove which is in insertion fit with the connecting rod shaft neck, the balance block is positioned at the insertion groove and is provided with a compression through groove, the compression through groove is communicated with the insertion groove, and the balance block is provided with a fastener for compressing the distance between the compression through grooves.
By adopting the technical scheme, in actual use, a worker inserts the connecting rod journal into the insertion groove, and then compresses the through groove by using the fastener, so that the side wall on the peripheral side of the insertion groove tightly embraces the outer wall of the connecting rod journal inserted into the insertion groove; when needing to dismantle, remove the compression effect of fastener to the logical groove of compression, remove the effect of hugging closely of the lateral wall of inserting groove week side to the connecting rod journal promptly, at this moment, alright take out the connecting rod journal from the inserting groove, convenient and fast.
The present invention may be further configured in a preferred embodiment as: the end part of the connecting rod shaft neck, which is close to the balance block, is provided with an inserting section, the outer diameter of the inserting section is smaller than that of the connecting rod shaft neck, and the inserting section is respectively inserted into the inserting groove and attached to the inner wall of the inserting groove.
Through adopting above-mentioned technical scheme, because the external diameter of grafting section is less than the external diameter of connecting rod journal for form the ladder butt face between grafting section and the connecting rod journal, consequently after the staff inserts the grafting groove with the grafting section, the ladder butt face butt between connecting rod journal and the grafting section is on the balancing piece, makes the staff can utilize the limiting displacement of ladder butt face, makes the staff with the grafting section propelling movement to suitable mounted position.
The present invention may be further configured in a preferred embodiment as: the end part of the balance block is divided into a first pressing block and a second pressing block by the compression through groove, the fastener is a fastening bolt, the fastening bolt penetrates through the first pressing block and abuts against the first pressing block, and the second pressing block is connected to the fastening bolt through threads.
Through adopting above-mentioned technical scheme, when the staff screwed up fastening bolt, the second compact heap was close to first compact heap along fastening bolt's length direction to make on the inner wall of inserting groove week side supported tight connecting rod axle journal grafting section's the outer wall, and then realized how to compress the mode that compresses the logical groove specifically.
The present invention may be further configured in a preferred embodiment as: a counter bore is formed in the side wall of the balance block, and the nut end of the fastening bolt is embedded into the counter bore.
Through adopting above-mentioned technical scheme, utilize the counter bore of seting up on the balancing piece lateral wall, reduce the quality of balancing piece on the one hand, on the other hand avoids fastening bolt's protruding interference, guarantees the planar level and smooth of balancing piece.
The present invention may be further configured in a preferred embodiment as: the end of the insertion section is provided with a guide chamfer.
By adopting the technical scheme, the guide chamfer arranged at the end part of the insertion section is utilized, so that the insertion section can be conveniently inserted into the insertion groove by a worker.
The present invention may be further configured in a preferred embodiment as: an elastic gasket is sleeved on the fastening bolt and is positioned between the fastening bolt and the first pressing block.
Through adopting above-mentioned technical scheme, utilize the elastic gasket of establishing of cover on fastening bolt, play locking effect to fastening bolt for fastening bolt screws up on first compact heap.
The present invention may be further configured in a preferred embodiment as: the plug-in section all is provided with the joint key, set up in the inserting groove and form joint complex joint groove with the joint key.
Through adopting above-mentioned technical scheme, in the in-service use, with the joint key on the grafting section and the joint groove looks joint in the inserting groove for the grafting section is more stable with being connected of balancing piece, and when this crank rotated, grafting section and balancing piece can not rotate relatively in its circumference.
The present invention may be further configured in a preferred embodiment as: and the inserting section is provided with an installation key slot for installing the clamping key.
Through adopting above-mentioned technical scheme, for joint key fixed connection on the surface of grafting section, in the joint key embedding installation keyway for the torsion that the joint key can bear is bigger.
The present invention may be further configured in a preferred embodiment as: and the connecting rod journal is provided with a limiting ring groove.
Through adopting above-mentioned technical scheme, in the in-service use, after rotating parts such as the bearing are established to the cover, some limit structure of spacing annular installation that the staff available connecting rod journal was last to set up carry out axial limiting displacement to rotating parts such as the bearing on the connecting rod journal.
Compared with the prior art, the beneficial effects of the utility model are as follows:
the connecting rod journal and the balance block are detachably and fixedly connected, when the connecting rod is installed, only the connecting rod big end of the driving connecting rod and the matched rotating piece are required to be sleeved on the connecting rod journal, so that the driving connecting rod is prevented from being arranged in a split manner, the structural strength of the driving connecting rod is improved, and the service life of the driving connecting rod is prolonged;
through the cooperation between installation keyway, joint key and the joint groove of seting up on connecting rod axle journal grafting section, improve the steadiness of being connected between connecting rod axle journal and the balancing piece.
Drawings
FIG. 1 is a schematic axial view of the crank assembly according to the present embodiment;
FIG. 2 is an exploded view of the crank assembly according to the present embodiment;
fig. 3 is an exploded view mainly showing a crank connecting rod structure for a twin-cylinder compressor in the prior art.
Reference numerals: 1. a front end shaft; 11. a connecting key groove; 2. a first crank; 3. a second crank; 4. a rear end shaft; 5. a counterbalance; 51. inserting grooves; 52. compressing the through groove; 53. a first compact block; 54. a second compact block; 55. a countersunk hole; 56. a clamping groove; 6. a connecting rod journal; 61. a plug section; 611. a stepped abutting surface; 612. guiding chamfering; 613. installing a key groove; 62. a limiting ring groove; 7. fastening a bolt; 8. an elastic pad; 9. a snap key.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, a crank assembly comprises a front end shaft 1, a first crank 2, a second crank 3 and a rear end shaft 4, wherein the front end shaft 1 is arranged in a stepped manner, a connecting key slot 11 used for being connected with a coupler is formed in one axial side of the front end shaft 1, the coupler is connected with an output shaft of a driving motor, the first crank 2 is fixed to the other axial end of the front end shaft 1, and the first crank 2 and the front end shaft 1 are integrally formed; the rear end shaft 4 is arranged in a ladder shape, one axial end of the rear end shaft 4 is rotatably arranged on the end cover of the box body through a bearing, and the second crank 3 is fixed at the other axial end of the rear end shaft 4 and is integrally arranged with the rear end shaft 4; a plurality of balance blocks 5 and connecting rod shaft necks 6 are arranged between the first crank 2 and the second crank 3 at intervals, in the embodiment, one balance block 5 is arranged, two connecting rod shaft necks 6 are arranged, and one axial end of each of the two connecting rod shaft necks 6 is respectively fixed on the first crank 2 and the second crank 3 and is integrally arranged; the other axial ends of the two connecting rod journals 6 are detachably and fixedly connected with the balance weight 5.
When installing the drive connecting rod, dismantle two connecting rod axle journals 6 from balancing piece 5, at this moment, the staff can directly overlap the big end of connecting rod of drive connecting rod and the rotation piece of setting in the axle journal pinhole and establish on connecting rod axle journal 6, then fix two connecting rod axle journals 6 on balancing piece 5, just accomplished the installation to the drive connecting rod, the connecting rod big end of drive connecting rod and the rotation piece of setting all need not to be the components of a whole that can function independently setting promptly, help improving the structural strength of drive connecting rod self, and then the life of increment drive connecting rod under the dynamic load of abrupt change, and it is more convenient to install.
As shown in fig. 1 and 2, the balance weight 5 is rectangular, the insertion grooves 51 penetrate through both sides of the balance weight 5 in the length direction, the two insertion grooves 51 are symmetrically arranged on the balance weight 5, the end portions of the two connecting rod journals 6 axially far away from the first crank 2 and the second crank 3 are integrally formed with insertion sections 61, the outer diameters of the two insertion sections 61 are smaller than the outer diameter of the connecting rod journals 6, namely, stepped abutting surfaces 611 are formed at the boundary positions of the two insertion sections 61 and the corresponding connecting rod journals 6, and the two insertion sections are attached to the inner walls of the two insertion grooves 51; the stepped abutting surface 611 is used for limiting the plugging section 61 inserted into the plugging slot 51; and the end parts of the two insertion sections 61 are provided with guide chamfers 612, which is convenient for a worker to insert and install the insertion sections 61 of the two connecting rod journals 6 in the insertion groove 51.
Compression through grooves 52 penetrate through the end parts of the two sides of the balance weight 5 in the length direction, the two compression through grooves 52 are respectively communicated with the insertion grooves 51 positioned on the same side, and the balance weight 5 on the side is divided into a first pressing block 53 and a second pressing block 54 by any one compression through groove 52; 5 length direction's of balancing piece both sides all are provided with and are used for compressing the fastener that leads to groove 52 and make first compact heap 53 and second compact heap 54 be close to each other, the fastener sets up to fastening bolt 7, and balancing piece 5 all has seted up counter bore 55 on being close to the lateral wall that two compression lead to grooves 52, two fastening bolt 7 pass the first compact heap 53 of 5 length direction both sides of balancing piece, and the nut embedding counter bore 55 of two fastening bolt 7 and support tightly on first compact heap 53, the screw thread end of two fastening bolt 7 passes through screw thread and second compact heap 54 looks fixed connection, and all overlap on two fastening bolt 7 and be equipped with elastic gasket 8, and arbitrary elastic gasket 8 all is located between the nut of two fastening bolt 7 and the diapire of counter bore 55, play the effect of anticreep pine fastening to fastening bolt 7.
In practical use, the staff respectively through screwing up two fastening bolts 7 for second compact heap 54 of balancing piece 5 length direction both sides is close to first compact heap 53 along the length direction that corresponds fastening bolt 7, thereby makes the inner wall of two inserting groove 51 week sides support tightly on the outer wall of two connecting rod axle journal 6 grafting sections 61, holds tightly two connecting rod axle journals 6 fixedly.
An installation key groove 613 is formed in the outer wall of any one of the inserting sections 61, which is close to one side of the balance block 5 in the axial direction, a clamping key 9 is embedded in any one of the installation key grooves 613, a clamping groove 56 which is in clamping fit with the clamping key 9 is formed in any one of the inserting grooves 51, the two clamping grooves 56 are positioned on the same straight line, and the two clamping grooves 56 are arranged away from each other; in practical use, the clamping key 9 is embedded and installed on the plugging section 61 of any connecting rod journal 6, and the clamping matching of the clamping key 9 and the clamping groove 56 is utilized, so that the dislocation and the relative rotation between the two plugging sections 61 and the inner wall of the plugging groove 51 can not occur, and the connection stability of the two connecting rod journals 6 in the two plugging grooves 51 is improved.
All seted up spacing annular 62 on two rod journal 6, in the use, after rotating parts such as the bearing were established to the cover on two rod journal 6, the staff utilized some limit structure of spacing annular 62 installation, for example spacing cardboard forms the joint cooperation with spacing annular 62, carries out axial limiting displacement to rotating parts such as the bearing of installing on two rod journal 6.
The implementation principle of the embodiment is as follows:
when the driving connecting rods are installed, workers can directly sleeve the connecting rod big heads of the two driving connecting rods and the rotating pieces arranged in the pin holes of the shaft necks on the two connecting rod shaft necks 6, and then limit the rotating pieces such as the bearings and the like in the axial direction by using the limiting structures and the limiting ring grooves 62;
then, the stepped abutting surfaces 611 on the inserting sections 61 of the two connecting rod shaft necks 6 abut against the side walls of the balance blocks 5, and then the inserting sections 61 inserted into the two inserting grooves 51 are pre-fixed by utilizing the clamping fit among the installation key grooves 613, the clamping key 9 and the clamping groove 56;
then, the staff is respectively through screwing up two fastening bolts 7, make the second compact heap 54 of balancing piece 5 length direction both sides be close to first compact heap 53 along the length direction that corresponds fastening bolt 7, thereby make the inner wall of two inserting groove 51 week sides support tightly on the outer wall of two connecting rod axle journal 6 grafting sections 61, hold tightly two connecting rod axle journals 6 and fix, just accomplished the installation to the drive connecting rod, the connecting rod major part of drive connecting rod and the rotation piece that disposes all need not to be the components of a whole that can function independently setting promptly, help improving the structural strength of drive connecting rod self, and then the life of increment drive connecting rod under the dynamic load of abrupt change, and it is more convenient to install.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (10)

1. The utility model provides a crank throw assembly, its characterized in that, includes front end axle (1), first crank (2), second crank (3) and rear end axle (4), first crank (2) are fixed to be set up at the tip of front end axle (1), the fixed tip that sets up in rear end axle (4) of second crank (3), the interval is provided with a plurality of balancing piece (5) and connecting rod journal (6) between first crank (2) and second crank (3), just connecting rod journal (6) and balancing piece (5) form can dismantle fixed connection, are close to the one end that two connecting rod journal (6) length direction of first crank (2) and second crank (3) kept away from corresponding balancing piece (5) is fixed respectively to be set up on first crank (2) and second crank (3).
2. A crank assembly according to claim 1, wherein the balance block (5) is provided with an insertion groove (51) which is engaged with the connecting rod journal (6) in an insertion manner, the balance block (5) is provided with a compression through groove (52) at the insertion groove (51), the compression through groove (52) is communicated with the insertion groove (51), and the balance block (5) is provided with a fastener for compressing the distance between the compression through grooves (52).
3. A crank assembly according to claim 2, characterized in that the end of the rod journal (6) close to the balance weight (5) is provided with an insertion section (61), the outer diameter of the insertion section (61) is smaller than the outer diameter of the rod journal (6), and the insertion sections (61) are inserted into the insertion grooves (51) respectively and attached to the inner walls of the insertion grooves (51).
4. A crank throw assembly according to claim 3 wherein the compression channel (52) divides the end of the counterweight (5) into a first holding-down block (53) and a second holding-down block (54), the fastener is provided as a fastening bolt (7), the fastening bolt (7) passes through the first holding-down block (53) and abuts against the first holding-down block (53), and the second holding-down block (54) is screwed onto the fastening bolt (7).
5. A crank assembly according to claim 4, characterised in that the counterweight (5) has a counter bore (55) in its side wall, the nut end of the fastening bolt (7) being inserted in the counter bore (55).
6. A crank assembly according to claim 3, characterised in that the end of the plug section (61) is provided with a guide chamfer (612).
7. A crank assembly according to claim 4, characterised in that the fastening bolt (7) is sleeved with an elastic washer (8), and the elastic washer (8) is located between the fastening bolt (7) and the first pressing block (53).
8. A crank assembly according to claim 3, wherein the plug sections (61) are each provided with a snap key (9), and the plug grooves (51) are each provided with a snap groove (56) which forms a snap fit with the snap key (9).
9. A crank assembly as claimed in claim 8, wherein the plug section (61) is provided with a mounting keyway (613) for mounting the snap key (9).
10. A crank assembly according to claim 1, characterised in that the connecting rod journal (6) is provided with a limiting ring groove (62).
CN202023106662.7U 2020-12-22 2020-12-22 Crank assembly Active CN214247974U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202023106662.7U CN214247974U (en) 2020-12-22 2020-12-22 Crank assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202023106662.7U CN214247974U (en) 2020-12-22 2020-12-22 Crank assembly

Publications (1)

Publication Number Publication Date
CN214247974U true CN214247974U (en) 2021-09-21

Family

ID=77740556

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202023106662.7U Active CN214247974U (en) 2020-12-22 2020-12-22 Crank assembly

Country Status (1)

Country Link
CN (1) CN214247974U (en)

Similar Documents

Publication Publication Date Title
CN214247974U (en) Crank assembly
CN216000303U (en) Efficient electric nut gun head with long service life
CN111288071B (en) Split-mounted long-stroke engine crankshaft
CN214248051U (en) Telescopic universal coupling
CN214146223U (en) Crank assembly
CN212250796U (en) Crankshaft with lubricating structure for compressor
CN221647395U (en) Assembled crankshaft structure
CN114542452B (en) Multi-cylinder slurry pump connecting rod cross head structure
CN220581417U (en) Engineering machinery hydraulic cylinder accessory
CN219623222U (en) Planetary reducer flange axle connection structure
CN217002771U (en) Detachable outer flat key embedded plum coupling
CN208950660U (en) A kind of new type of cam shaft assembly
CN213402710U (en) Speed reducing motor shaft
CN221628469U (en) Special pump shaft for keyless transmission
CN211288671U (en) Automobile engine crankshaft damping belt pulley
CN213270689U (en) Detachable engine crankshaft
CN221033122U (en) Compressor device
CN219388417U (en) Split type bent axle of outboard engine double-cylinder
CN216950746U (en) Oil-free air compressor crankshaft
CN220248691U (en) Spliced middle bearing seat
CN215672694U (en) Screw pump of separated shell bearing box
CN210928710U (en) Hedge trimmer gear drive mechanism
CN214837956U (en) Shunting locomotive and gear coupling thereof
CN219994205U (en) Gear box of pure electric loader
CN217702225U (en) Speed reducer assembling system

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CP01 Change in the name or title of a patent holder

Address after: 201100 building 6, No.36 and 100, Lane 2868, Sanlu highway, Pujiang Town, Minhang District, Shanghai

Patentee after: Shanghai Yusheng Compression Machinery Co.,Ltd.

Address before: 201100 building 6, No.36 and 100, Lane 2868, Sanlu highway, Pujiang Town, Minhang District, Shanghai

Patentee before: SHANGHAI YUSHENG COMPRESSION MACHINERY CO.,LTD.

CP01 Change in the name or title of a patent holder