CN212690267U - Compressor crankshaft limiting device - Google Patents

Abstract

The utility model provides a compressor crankshaft stop device, compressor drive piston rod reciprocating motion's bent axle on arranging the pump body in an open chamber shell in and being located the pump body, the free end fixedly connected with supporting seat of bent axle, the chamber shell is opened and is located the detachable mode and be equipped with the top cap lid, stop device includes spacing boss of fixed connection on the supporting seat, constructs the convex closure on the top cap lid and installs the stop collar between spacing boss and convex closure, wherein: one end of the limiting sleeve is provided with a groove for pushing the limiting boss, and the other end of the limiting sleeve is provided with a ring groove which is in matched insertion connection with the convex cover; and a shake-holding clearance which allows the crankshaft to shake horizontally and vertically during operation is reserved in the groove, and the shake-holding clearance distance is smaller than the minimum installation distance between the outer contour of the pump body and the inner wall of the cavity shell. The problem of compressor crankshaft operation work shake the range excessively greatly unusually, cause the compressor crankshaft to strike the unusual sound of chamber shell is solved, guaranteed compressor steady operation.

Description

Compressor crankshaft limiting device

Technical Field

The utility model relates to a compressor equipment field, concretely relates to compressor crankshaft stop device.

Background

At present, the compressor is widely applied, the manufacturing cost of the compressor is high, and some compressors, such as a piston compressor, mainly comprise a pump body, a crankshaft, a connecting rod, a piston group, a valve, an oil circulation system and other components. The compressor pump body comprises a working cylinder assembled in the shell, a transmission part for driving a piston rod of the working cylinder to do reciprocating motion in the cylinder of the working cylinder and a compression pump body for providing a power source for the transmission part, wherein the transmission part is a crankshaft connecting rod structure connected between a motor rotor and the piston rod. The compressor pump body drives the piston rod to move through the crankshaft connecting rod structure, the piston rod drives the piston to reciprocate in the cylinder, the volumes of the working cavities on two sides of the piston are changed in turn, gas on one side with reduced volume is discharged through the gas valve due to pressure increase, gas on one side with increased volume is sucked through the gas valve due to pressure reduction, and the transmission part is used for realizing reciprocating motion and compressing a refrigerant.

In order to reduce the shaking motion generated between the high-speed operation of the compressor crank connecting rod mechanism and the operation of the piston rod in the prior art, a plurality of anti-collision limit points are usually arranged and a plurality of limit plates are arranged on the inner wall of the cavity shell to limit the swinging amplitude of the compressor pump body in the cavity shell in upward and horizontal directions. The excessive spacing clearance can make the compressor crankshaft rock the too big probability that the pump body accident drops when the scope increases when rotating. Because the inside of the compressor pump body is supported by the spring, the crankshaft on the compressor still swings when the compressor runs; the over-small limiting gap can cause the abnormal noise of the crankshaft colliding with the inner wall of the cavity shell, and the consistency of the limiting gap is difficult to control due to errors in part processing and assembling.

SUMMERY OF THE UTILITY MODEL

Not enough to exist among the prior art, the utility model provides a compressor crankshaft stop device has solved compressor crankshaft operation during operation unusual amplitude of rocking too big, causes the problem of the unusual sound of bent axle striking chamber shell on the compressor.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a compressor crankshaft stop device, compressor including arrange the pump body in an open chamber shell in and be located the pump body on the bent axle of drive piston rod reciprocating motion, the free end of bent axle rotates and is connected with the supporting seat, the chamber shell is opened and is taken the detachable mode to be equipped with the top closing cap, stop device includes spacing boss of fixed connection on the supporting seat, the convex closure of structure on the top closing cap and installs the stop collar between spacing boss and convex closure, wherein: one end of the limiting sleeve is provided with a groove for pushing the limiting boss, and the other end of the limiting sleeve is provided with a ring groove which is in matched insertion connection with the convex cover; and a shake-holding clearance allowing the crankshaft to shake horizontally and vertically during operation is reserved behind the limiting boss accommodated in the groove, and the shake-holding clearance is smaller than the minimum installation distance between the outer contour of the pump body and the inner wall of the cavity shell.

Furthermore, a buffer assembly for reducing the impact stress of the limiting boss is arranged in a gap space formed by the peripheral side wall of the limiting boss and the inner side wall of the groove; the buffer assembly comprises a movable pad sleeved on the limiting boss, a buffer sleeve sleeved on the outer side of the circumference of the movable pad and a plurality of elastic pieces arranged between the buffer sleeve and the groove in a circumferential equidistant mode.

Furthermore, the movable cushion comprises a support sleeve, a plurality of cushion blocks which are equidistantly arranged along the circumferential direction of the limiting boss and a sliding groove which is constructed on the support sleeve and used for the cushion blocks to move towards or away from the limiting boss in the radial direction.

Further, every elastic component all includes that the sleeve of structure on the cushion collar outer wall and wherein one end fix the spring in the sleeve bottom, and the spring other end emits the sleeve and is provided with spacing lid, and spacing lid supports to the recess inside wall under the effect of spring, still keep sliding connection with the flexible direction of restriction spring between spacing lid and the sleeve.

Further, a sponge cushion is arranged between the upper wall of the limiting boss and the inner side wall of the convex cover.

The technical principle of the utility model lies in: through installing the spacing pad between spacing boss and convex cover, because spacing pad both ends are equipped with each other and are the recess and the annular that open direction is opposite, satisfy simultaneously that spacing boss injects and the convex cover cooperation is pegged graft, realized that the range of rocking that the bent axle on the compressor produced at the operating condition reduces, its impact pressure reduces owing to increase the area of contact of convex cover and stop collar for rock the noise that produces and obtain reducing.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses a with among the prior art a plurality of horizontal limiting plate and the crashproof contact of installing in the chamber shell control the compressor pump body rocking in the inside, the improvement is the spacing boss of connecting through the free end that lies in the bent axle on the compressor on the one hand and inserts in the stop collar, the protruding lid cooperation of structure on the top closing cap simultaneously injects, and leave the clearance space that makes bent axle on the compressor rock in the chamber shell, because the clearance space of reserving is less than the minimum safe distance of compressor pump body outline and chamber shell inner wall, the spacing distance of spacing boss lateral wall and protruding lid inner wall contact is little, make the rocking amplitude of the bent axle running state in-process production of compressor obtain the restriction.

2. After inserting into the inner annular groove of the stop collar through the convex cover cooperation, because the inner wall of the annular groove is in full contact with the side wall inserted by the convex cover, the annular groove wraps up the part inserted by the convex cover, the impact stress to the stop collar is slowed down by the increase of the contact area of the convex cover and the stop collar due to the shaking of the limiting boss, meanwhile, the noise caused by the shaking is reduced, and the limiting stability is improved.

3. Through the buffering subassembly that the clearance space in spacing boss week lateral wall and the convex cover set up, can further reduce the spacing boss because of the rocking impact force that the function of bent axle brought, ensure that the bent axle operates steadily.

Drawings

Fig. 1 is a schematic view of a position structure of a position limiting device in an embodiment of the present invention.

Fig. 2 is the whole sectional view of the limiting device after assembly in the embodiment of the present invention.

Fig. 3 is a schematic view of the overall structure of the limiting device in the embodiment of the present invention.

Fig. 4 is an explosion structure diagram of the limiting device in the embodiment of the present invention.

Fig. 5 is a schematic view of the overall structure of the cushion cover and the movable cushion in the embodiment of the present invention.

Fig. 6 is a partially enlarged schematic view at a of fig. 4.

Fig. 7 is a schematic view of the limiting device during assembly in the embodiment of the present invention.

Fig. 8 is a perspective view of the inner part of the limiting device after being assembled in the embodiment of the present invention.

Reference numerals:

1. a pump body; 10. a crankshaft; 2. a top sealing cover; 20. a chamber housing; 3. a convex cover; 4. a supporting seat; 41. a limiting device; 5. a limiting boss; 51. a sponge cushion; 56. a groove; 6. a limiting sleeve; 60. a ring groove; 61. a limiting cover; 62. a through hole; 7. a movable pad; 70. a support sleeve; 71. cushion blocks; 72. a chute; 8. a buffer sleeve; 80. a sleeve; 9. an elastic member; 90. a spring.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and embodiments.

Referring to fig. 1 and 2, according to the embodiment of the present invention, a compressor crankshaft limiting device is provided, the compressor is disposed in a pump body 1 in an open cavity shell 20 and a crankshaft 10 located on the pump body 1 and driving a piston rod to reciprocate, a free end of the crankshaft 10 is connected to a supporting seat 4 in a rotating manner, the crankshaft 10 rotates under the action of the pump body 1 to generate an eccentric operation, the free end of the crankshaft 10 shown in the figure of the present embodiment is connected to the bottom of the supporting seat 4 in a rotating manner and rotates around the supporting seat 4, the cavity shell 20 is provided with a top sealing cover 2 in a detachable manner at the open position, the limiting device 41 includes a limiting boss 5 fixedly connected to the supporting seat 4, a convex cover 3 configured on the top sealing cover 2, and a limiting sleeve 6 installed between the limiting boss 5 and the convex cover 3:

referring to fig. 1, 3 and 7, one end of the position-limiting sleeve 6 is provided with a groove 56 for the position-limiting boss 5 to be pushed into, and the other end is provided with a ring groove 60 which is inserted into the convex cover 3 in a matching manner. After the convex cover 3 is inserted into the ring groove 60, the depth of the ring groove 60 is matched with the cover degree of the convex cover 3, and the side wall of the convex cover 3 is fully connected with the inner wall of the ring groove 60, so that the contact area of the side wall is increased.

Referring to fig. 2, after the limiting boss is received in the groove 56, a shake-holding gap that allows the crankshaft 10 to shake horizontally and vertically during operation is reserved, and the shake-holding gap distance is smaller than the minimum installation distance between the outer contour of the pump body 1 and the inner wall of the cavity shell 20. During the use, the convex cover 3 cooperation is inserted into annular groove 60, spacing boss 5 and is inserted in recess 56, and the range of rocking that makes bent axle 10 rotatory production around supporting seat 4 bottom is restricted inside stop collar 6 when the operation of the pump body 1, and allows spacing boss 5 to strike behind the effort that produces to recess 56 because annular groove 60 makes the pressure reduction that the effort produced with the abundant contact of convex cover 3 lateral wall, consequently rock the noise that produces and obtain reducing.

Referring to fig. 2 and 4, according to another embodiment of the present invention, a buffer assembly for reducing the impact stress of the limiting boss 5 is disposed in a gap space formed between the sidewall of the limiting boss 5 and the inner sidewall of the convex cover 3;

referring to fig. 4, 5 and 8, the buffering assembly includes a movable pad 7 sleeved on the limiting boss 5, a buffering sleeve 8 sleeved outside the circumference of the movable pad 7, and a plurality of elastic members 9 circumferentially and equidistantly arranged between the buffering sleeve 8 and the groove 56.

Referring to fig. 6 and 8, as another embodiment of the present invention, the movable pad 7 includes a supporting sleeve 70, a plurality of pads 71 equidistantly arranged along the circumferential direction of the limiting boss 5, and a sliding groove 72 configured on the supporting sleeve 70 for each pad 71 to move toward or away from the radial direction of the limiting boss 5, wherein each sliding groove 72 is engaged with one pad 71 to perform a translational movement. Cushion 71 also has the cushion 71 along the axial of spacing boss 5 equidistance distribution in this embodiment when circumference distributes, and during the use, under the effect of the spout 72 of cushion 71 and the effect that spacing boss 5 rocked, the extrusion cushion 71 makes the effort transmit on cushion sleeve 8, and cushion sleeve 8 is collected the effort and is slowed down through elastic component 9 for the effort obtains reducing, ensures that the effort that transmits on stop collar 6 obtains preliminary reduction.

As another embodiment of the present invention, each elastic member 9 includes a sleeve 80 constructed on the outer wall of the cushion collar 8 and a spring 90 having one end fixed to the bottom of the sleeve 80, the other end of the spring 90 protrudes out of the sleeve 80 and is provided with a limit cover 61, the limit cover 61 is supported against the inner side wall of the groove 56 under the action of the spring 90, and a sliding connection is further maintained between the limit cover 61 and the sleeve 80 to limit the extending and retracting direction of the spring 90. When the buffer sleeve 8 is compressed by bearing the acting force from the cushion block 71 during use, the spring 90 is compressed to relieve the acting force, and the sleeve 80 and the limiting cover 61 move oppositely and are inserted to limit the deviation of the track of the spring 90 in a compressed state so as to destroy the elastic action of the spring 90 and influence the buffering effect of the acting force caused by the buffer sleeve 8.

As other embodiments of the present invention, referring to fig. 2 and 7, the limiting pad is further provided with a through hole 62, the sponge pad 51 is installed between the upper wall of the limiting boss 5 and the inner wall of the convex cover 3 through the through hole 62, and the sponge pad 51 slows down the rocking stress in the vertical direction of the limiting boss 5.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims (6)

1. The utility model provides a compressor crankshaft stop device, compressor including arrange in a pump body (1) that opens the chamber shell (20) and be located the crankshaft (10) that drive piston rod reciprocating motion on the pump body (1), the free end of crankshaft (10) is rotated and is connected with supporting seat (4), chamber shell (20) are opened and are in the removable mode of being equipped with top closing cap (2), its characterized in that:

stop device (41) are including spacing boss (5) of fixed connection on supporting seat (4), convex closure (3) of structure on top closing cap (2) and install stop collar (6) between spacing boss (5) and convex closure (3), wherein:

one end of the limiting sleeve (6) is provided with a groove (56) for the limiting boss (5) to jack in, and the other end is provided with a ring groove (60) which is matched and spliced with the convex cover (3); and a shake-holding clearance allowing the crankshaft (10) to shake horizontally and vertically during operation is reserved behind the limiting boss (5) accommodated in the groove (56), and the shake-holding clearance is smaller than the minimum installation distance between the outer contour of the pump body (1) and the inner wall of the cavity shell (20).

2. The compressor crankshaft limiting device of claim 1, wherein: and a buffer assembly for reducing the impact stress of the limiting boss (5) is arranged in a gap space formed by the peripheral side wall of the limiting boss (5) and the inner side wall of the groove (56).

3. The compressor crankshaft limiting device of claim 2, wherein: the buffer assembly comprises a movable pad (7) sleeved on the limiting boss (5), a buffer sleeve (8) sleeved outside the circumference of the movable pad (7) and a plurality of elastic pieces (9) arranged between the buffer sleeve (8) and the groove (56) in a circumferential equidistant manner.

4. The compressor crankshaft limiting device of claim 3, wherein: the movable cushion (7) comprises a support sleeve (70), a plurality of cushion blocks (71) which are equidistantly arranged along the circumferential direction of the limiting boss (5) and sliding grooves (72) which are constructed on the support sleeve (70) and used for enabling the cushion blocks (71) to move towards or away from the limiting boss (5) in the radial direction.

5. The compressor crankshaft limiting device of claim 4, wherein: every elastic component (9) all include sleeve (80) of structure on cushion collar (8) outer wall and wherein one end fix spring (90) in sleeve (80) bottom, and sleeve (80) are emerged and spacing lid (61) are provided with to the other end of spring (90), and spacing lid (61) are in support to recess (56) inside wall under the effect of spring (90), still keep sliding connection in order to restrict the flexible direction of spring (90) between spacing lid (61) and sleeve (80).

6. The compressor crankshaft limiting device of claim 5, wherein: a spongy cushion (51) is arranged between the upper wall of the limiting boss (5) and the inner side wall of the convex cover (3).

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