CN220365712U - Transmission part with flexible shaft and screw pump - Google Patents

Abstract

The utility model relates to the technical field of screw pumps, in particular to a transmission component with a flexible shaft and a screw pump, wherein the transmission component comprises the following components in transmission connection in sequence: a drive shaft, a flexible shaft assembly, and a rotor; and the flexible shaft assembly includes: the flexible shaft comprises a transmission shaft fixed end fixedly connected with the transmission shaft and a rotor fixed end screwed with the rotor; the first nut, it is movably suit in the periphery of flexible axle, and the spiro union is in the rotor, and first nut exists: and a limiting structure for limiting the rotor fixed end to prevent the rotor fixed end from being separated from the rotor is formed at one side of the rotor fixed end, which is away from the rotor. According to the utility model, the transmission part with the flexible shaft is preferable, and the flexible shaft and the rotor are detachably arranged, so that the rotor is directly detached and replaced, the convenience of rotor detachment and replacement is improved, the later maintenance cost and maintenance efficiency are reduced, and meanwhile, the extra resource waste is reduced.

Description

Transmission part with flexible shaft and screw pump

Technical Field

The utility model relates to the technical field of screw pumps, in particular to a transmission component with a flexible shaft and a screw pump.

Background

In the industries of lithium batteries, food industry or medicine, daily chemical products, chemical industry and the like which have requirements on cleanliness, when a single screw pump is used for conveying materials, lubricating oil, metal particles and the like are not allowed to be mixed into the materials. The traditional single-screw pump is in shaft and hole type matched connection, a certain amount of lubricating oil and grease are needed to be added, lubrication, cooling and abrasion resistance are facilitated, frequent friction between the shaft and the hole can continuously generate metal abrasion particles, particle impurities are generated, and the problem that the single-screw pump is inapplicable exists.

Based on this, in modern technology, a single screw pump with a flexible shaft is generally selected for the working condition industry. The flexible shaft transmission part is a core part of the single-screw pump, and comprises a transmission shaft, a flexible shaft and a rotor which are sequentially connected in a transmission way, wherein the rotor is in interference fit with a stator which is adaptively connected with the rotor, the stator is a rubber part with certain hardness, and the rotor is generally a stainless steel part. During operation of the pump, both the stator and the rotor are wearing parts in a single screw pump, and often need to be replaced.

In the existing flexible shaft transmission part, the flexible shaft is connected with the rotor and the flexible shaft is connected with the transmission shaft in a hot-filling mode, so that the three parts become a whole, and the flexible shaft transmission part cannot be detached without special treatment process. When the rotor is worn and needs to be replaced, the condition of disassembling the hot-assembling parts is not provided on the customer site and under most working conditions, the whole transmission part is required to be replaced, and the whole pump is required to be disassembled because of the large number of front and rear related parts, so that the transmission part can be taken out, the resulting effects are that the maintenance difficulty is high, the cost is high, the efficiency is low, the time and the labor are wasted, and the undamaged flexible shaft and the transmission shaft are required to be disassembled and replaced together, so that the resource waste is caused.

Disclosure of Invention

One of the purposes of the utility model is to provide a transmission part with a flexible shaft aiming at the defects of the prior art, and the flexible shaft and a rotor can be arranged in a detachable way, so that the rotor can be directly detached and replaced, the convenience of rotor detachment and replacement is improved, the later maintenance cost and maintenance efficiency are reduced, and meanwhile, the extra resource waste is reduced.

Another object of the present utility model is to provide a screw pump having the above-mentioned transmission member with a flexible shaft.

The technical solution of the utility model is as follows:

a transmission component with a flexible shaft comprising, in sequential transmission connection: a drive shaft, a flexible shaft assembly, and a rotor;

and the flexible shaft assembly comprises:

the flexible shaft comprises a transmission shaft fixed end fixedly connected with the transmission shaft and a rotor fixed end screwed with the rotor;

a first nut movably sleeved on the periphery of the flexible shaft and screwed to the rotor, wherein the first nut is:

and one side of the rotor fixing end, which is away from the rotor, is used for limiting the rotor fixing end so as to prevent the rotor fixing end from being separated from a limiting structure of the rotor.

In the scheme, based on the dismounting requirement of the rotor, the rotor is connected to the flexible shaft through the threaded connection structure which is stable in connection and convenient to dismount, so that the rotor is convenient to dismount and replace; meanwhile, aiming at the requirement of stable transmission, the first nut is additionally arranged to lock the threaded connection structure between the flexible shaft and the rotor, so that the flexible shaft is prevented from being separated from the rotor, the connection stability between the rotor and the flexible shaft is improved, the whole transmission part can stably perform transmission work, and the possibility of safety accidents caused by separation of the rotor and the flexible shaft is reduced.

Further preferably, the rotor is provided with a flexible shaft, and the flexible shaft is provided with a plurality of grooves: the notch being oriented toward a rotor end slot of the flexible shaft;

extending from the slot into the slot, the rotor end slot comprising slots that decrease in sequence: a limit groove section and a screw connection groove section;

the rotor fixing end is inserted in an adaptive manner and is in threaded connection with the threaded connection groove section, a rotor fixing end limiting part is convexly arranged on the periphery of the rotor fixing end, and the rotor fixing end limiting part is accommodated in the limiting groove section in an adaptive manner.

Further preferably, the first nut comprises a first nut limiting part A inserted into and screwed into the limiting groove section;

the rotor fixing end is arranged on one side, deviating from the rotor, of the rotor fixing end, and the limiting structure is formed in a limiting mode through the first nut limiting portion A.

Further preferably, the first nut is screwed on the periphery of the rotor, and the first nut comprises a first nut limiting part B which protrudes towards the flexible shaft and is arranged at one side of the rotor fixing end limiting part, which is away from the rotor;

the rotor fixing end is arranged on one side, deviating from the rotor, of the rotor fixing end, and the limiting structure is formed in a limiting mode through the first nut limiting portion B.

Further preferably, the screw thread of the screw connection structure between the rotor fixed end and the rotor is screwed to conform to the steering arrangement of the flexible shaft during operation.

Further preferably, the screw thread of the screw connection structure between the first nut and the rotor turns to reversely conform to the steering arrangement of the flexible shaft when in operation.

Further preferably, the periphery of the rotor is screwed with a pre-tightening nut, the pre-tightening nut is located on one side of the first nut facing the rotor, and the pre-tightening nut is attached to and pressed against the first nut in the direction from the rotor to the flexible shaft.

A screw pump comprising a transmission member with a flexible shaft as claimed in any one of the preceding aspects.

The technical scheme has the main beneficial effects that:

the flexible shaft and the rotor are fixed in a screwed mode, so that the rotor to be disassembled and replaced is disassembled conveniently, the rotor is disassembled and replaced directly, convenience in disassembling and replacing the rotor is improved, later maintenance cost and maintenance efficiency are reduced, and additional resource waste is reduced; meanwhile, the first nut is arranged to lock and limit the screw structure between the flexible shaft and the rotor, so that the flexible shaft is prevented from being separated from the rotor, the connection stability between the rotor and the flexible shaft is improved, the whole transmission part can stably perform transmission work, and the possibility of safety accidents caused by separation of the rotor and the flexible shaft is reduced.

Further or more detailed benefits will be described in connection with specific embodiments.

Drawings

The utility model is further described with reference to the accompanying drawings:

FIG. 1 is a schematic diagram of an assembly of a transmission component with a flexible shaft.

FIG. 2 is a schematic cross-sectional view of a transmission member with a flexible shaft.

Fig. 3 is an enlarged schematic view of the portion a in fig. 2.

Fig. 4 is an assembly schematic of the pretensioned nut.

The figure shows: a transmission shaft-1 and a transmission shaft end groove-101;

the flexible shaft assembly-2, the flexible shaft-201, the transmission shaft fixing end-201 a, the rotor fixing end-201B, the rotor fixing end limiting part-201B 1, the first nut-202, the first nut limiting part A-202a and the first nut limiting part B-202B;

the rotor-3, the rotor end groove-301, the limit groove section-301 a and the screw joint groove section-301 b;

and pre-tightening the nut-4.

Detailed Description

The utility model is illustrated by the following examples in which:

embodiment one:

a transmission part with a flexible shaft is mainly used for transmission in a screw pump or a pump body structure of a type; referring to fig. 1 to 4, it mainly comprises the following components in driving connection: the flexible shaft assembly comprises a transmission shaft 1, a flexible shaft assembly 2 and a rotor 3, wherein the transmission shaft 1 is connected with an external power device such as a rotating motor, and the transmission shaft 1 realizing rotation drives the flexible shaft assembly 2 and the rotor 3 to rotate in sequence to work.

The rotor 3 is required to be replaced by a certain period as an easily worn member, and thus there is a need for convenient replacement.

Based on the above-described requirements, as shown in fig. 2, the flexible shaft assembly 2 in the present embodiment includes a flexible shaft 201 and a first nut 202.

Specifically, the flexible shaft 201 includes a fixed shaft end 201a fixedly connected to the transmission shaft 1, and a fixed rotor end 201b screwed to the rotor 3; the first nut 202 is movably sleeved on the outer periphery of the flexible shaft 201 and is screwed to the rotor 3, and the first nut 202 is: a limit structure is formed on the rotor fixing end 201b at one side of the rotor fixing end 201b away from the rotor 3 to prevent the rotor fixing end 201b from separating from the rotor 3.

In this way, the rotor 3 is connected to the flexible shaft 201 through a screw connection structure which is stable in connection and convenient to detach, so that the rotor 3 is convenient to detach and replace; meanwhile, aiming at the requirement of stable transmission, the first nut 202 is additionally arranged to lock the threaded connection structure between the flexible shaft 201 and the rotor 3, so that the flexible shaft 201 is prevented from being separated from the rotor 3, the connection stability between the rotor 3 and the flexible shaft 201 is improved, the whole transmission part can stably perform transmission work, and the possibility of safety accidents caused by separation of the rotor 3 and the flexible shaft 201 is reduced.

As a screw structure, the rotor fixing end 201b of the flexible shaft 201 may be inserted into the end of the rotor 3 to screw, and the end of the rotor 3 may be inserted into the rotor fixing end 201b to screw.

In the present embodiment, the rotor fixing end 201b of the flexible shaft 201 is inserted into the end of the rotor 3 and screwed, so that the flexible shaft 201 can support the rotor 3 better.

Specifically, as shown in fig. 3, the rotor 3 is provided with: the notch faces the rotor end slot 301 of the flexible shaft 201; extending inwardly from the slot, the rotor end slot 301 includes slots that decrease in sequence: limit groove section 301a, spiro union groove section 301b. The rotor fixing end 201b of the flexible shaft 201 is inserted into the screw connection groove section 301b in an adapting mode, a rotor fixing end limiting portion 201b1 is arranged on the periphery of the rotor fixing end 201b in a protruding mode, and the rotor fixing end limiting portion 201b1 is accommodated in the limiting groove section 301a in an adapting mode.

At this time, there are two connection modes of the first nut 202.

In one form, as shown in fig. 3, the first nut 202 includes a first nut stop portion a202a that is inserted into and screwed into the stop slot segment 301 a; at the rotor fixing end 201b, specifically, at a side of the rotor fixing end 201b, which faces away from the rotor 3 (i.e., right side in fig. 3), a rotor fixing end limiting portion 201b1 is limited by a first nut limiting portion a202a, which forms a limiting structure.

At this time, as shown in fig. 3, the side walls around the port of the screw connection groove section 301b and the first nut limiting portion a202a together form a left-right limit for the rotor fixing end limiting portion 201b1, so as to prevent the rotor fixing end limiting portion 201b1 from being separated.

In another way, as shown in fig. 4, the first nut 202 is screwed on the outer periphery of the rotor 3, and the first nut 202 includes a first nut limiting portion B202B protruding toward the flexible shaft 201 and disposed on one side of the rotor fixing end limiting portion 201B1 facing away from the rotor 3; specifically, the rotor fixing end limiting portion 201B1 on the rotor fixing end 201B is opposite to the rotor 3 (i.e. right side in fig. 3), and the first nut limiting portion B202B forms a limiting structure for limiting the rotor fixing end limiting portion 201B 1.

At this time, as shown in fig. 4, the side walls around the port of the limiting groove section 301a and the first nut limiting portion B202B together form a left-right limit for the rotor fixing end limiting portion 201B1, so as to prevent the rotor fixing end limiting portion 201B1 from being separated.

Further, in order to further ensure the connection stability, the working environment of the embodiment adapted to the rotation of the transmission component preferably sets the screw rotation direction of the screw structure between the rotor fixing end 201b and the rotor 3.

Specifically, the screw thread direction of the screw connection structure between the rotor fixing end 201b and the rotor 3 preferably conforms to the steering arrangement of the flexible shaft 201 in operation.

For example, when the pump starts to work and drives the transmission shaft 1 to sequentially drive the flexible shaft assembly 2 and the rotor 3 to rotate anticlockwise to work, the inner side wall of the screw connection groove section 301b is preferably provided with left-handed thick-thread inner threads, and the periphery of the rotor fixing end 201b is provided with left-handed thick-thread outer threads, that is, the rotation direction of the flexible shaft 201 is consistent with the rotation direction of the threads. Therefore, when the flexible shaft 201 is just started and the transmission shaft 1 drives the flexible shaft 201 to rotate, the rotor fixed end 201b of the flexible shaft 201 rotates along the direction of screwing into the screw connection groove section 301b, so that the flexible shaft 201 is more tightly connected with the rotor 3, and then the rotor 3 is driven to rotate.

On this basis, the thread direction of the threaded connection between the first nut 202 and the rotor 3 is preferably reversed to accommodate the steering arrangement of the flexible shaft 201 during operation.

For example, when the pump is started and drives the transmission shaft 1 to sequentially drive the flexible shaft assembly 2 and the rotor 3 to rotate anticlockwise for working, as shown in fig. 3, a right-handed fine tooth internal thread is provided on the inner side wall of the limiting groove section 301a, and a right-handed fine tooth external thread is provided on the outer periphery of the first nut limiting portion a202a; alternatively, as shown in fig. 4, a right-handed thread is provided on the outer periphery of the rotor 3, and a right-handed thread is provided on the first nut 202. I.e. the flexible shaft 201 rotates in the opposite direction to the threads of the thread structure of the first nut 202 mounted on the rotor 3.

In this way, when the pump is reversed by the erroneous operation and the flexible shaft 201 and the rotor 3 are loosened, the rotor fixing end 201b of the flexible shaft 201 is screwed out of the rotor end groove 301, and the rotor fixing end stopper 201b1 is pressed against the first nut 202 to rotate the first nut 202. Due to the reverse arrangement of the screw thread rotation direction and the rotation direction of the flexible shaft 201, the first nut 202 is driven to rotate, so that the first nut 202 is driven to be in closer screwed connection with the rotor 3, the connection between the flexible shaft 201 and the rotor 3 is locked, and the rotor 3 and the flexible shaft 201 are prevented from being loosened.

Of course, in order to achieve a better locking function of the first nut 202, the roughness of the contact surface between the first nut 202 and the rotor fixing end limiting portion 201b1 may be set, and the flexible shaft 201 may be increased in roughness to better drive the first nut 202 to be screwed.

As shown in fig. 4, a pre-tightening nut 4 can be additionally arranged. Specifically, the periphery of the rotor 3 is screwed with a pre-tightening nut 4, the pre-tightening nut 4 is located on one side of the first nut 202 facing the rotor 3, and the first nut 202 is pressed in a fitting manner in the direction from the rotor 3 to the flexible shaft 201, and a spring washer is similarly added to realize pressing pre-tightening of the first nut 202.

At this time, since the flexible shaft 201 does not have a frequent replacement requirement, in order to keep the connection stable, the shaft fixing end 201a of the flexible shaft 201 is inserted into the shaft 1 and is heat-assembled with the shaft 1, and the aperture of the first nut 202 is adapted to the shaft diameter of the flexible shaft 201 and the shaft diameter of the shaft fixing end 201a, so that the first nut 202 can be sleeved on the flexible shaft 201 from the shaft fixing end 201a before the shaft fixing end 201a is heat-assembled with the shaft 1.

Embodiment two:

a screw pump comprising a flexible shaft drive member according to any of the embodiments.

The foregoing description is only of the preferred embodiments of the utility model and is not intended to limit the scope of the utility model. In addition, references to the terms "vertical", "horizontal", "front", "rear", etc., in the embodiments of the present utility model indicate that the apparatus or element in question has been put into practice, based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product is conventionally put in use, merely for convenience of description and to simplify the description, but do not indicate or imply that the apparatus or element in question must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model. It should be further noted that, unless explicitly stated or limited otherwise, terms such as "mounted," "connected," "secured," and the like in the description are to be construed broadly as, for example, "connected," either permanently connected, detachably connected, or integrally connected; either directly or indirectly through intermediaries, or in communication with each other. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (8)

1. A transmission component with a flexible shaft, comprising, in sequential transmission connection: a transmission shaft (1), a flexible shaft assembly (2) and a rotor (3);

and the flexible shaft assembly (2) comprises:

a flexible shaft (201) comprising a transmission shaft fixed end (201 a) fixedly connected to the transmission shaft (1), and a rotor fixed end (201 b) screwed to the rotor (3);

a first nut (202) that is movably fitted around the outer periphery of the flexible shaft (201) and is screwed to the rotor (3), and the first nut (202) is provided with:

and a limiting structure for limiting the rotor fixing end (201 b) on one side of the rotor fixing end (201 b) away from the rotor (3) so as to prevent the rotor fixing end (201 b) from being separated from the rotor (3).

2. A transmission component with a flexible shaft as in claim 1, wherein: one end of the rotor (3) close to the flexible shaft (201) is provided with: a slot opening towards a rotor end groove (301) of the flexible shaft (201);

extending from the slot into the slot, the rotor end slot (301) comprising slots that decrease in sequence: a limit groove section (301 a) and a screw connection groove section (301 b);

the rotor fixing end (201 b) is inserted in an adaptive manner and is in threaded connection with the threaded groove section (301 b), a rotor fixing end limiting portion (201 b 1) is arranged on the periphery of the rotor fixing end (201 b) in a protruding manner, and the rotor fixing end limiting portion (201 b 1) is accommodated in the limiting groove section (301 a) in an adaptive manner.

3. A transmission component with a flexible shaft as in claim 2, wherein: the first nut (202) comprises a first nut limiting part A (202 a) which is inserted into the limiting groove section (301 a) and is screwed in the limiting groove section;

the first nut limiting part A (202 a) is formed with the limiting structure in a limiting manner on the rotor fixing end limiting part (201 b 1) at one side of the rotor fixing end (201 b) away from the rotor (3).

4. A transmission component with a flexible shaft as in claim 2, wherein: the first nut (202) is in threaded connection with the periphery of the rotor (3), and the first nut (202) comprises a first nut limiting part B (202B) which protrudes towards the flexible shaft (201) and is arranged at one side of the rotor fixing end limiting part (201B 1) away from the rotor (3);

the first nut limiting part B (202B) is formed with the limiting structure in a limiting manner on the rotor fixing end (201B) side away from the rotor (3) and the rotor fixing end limiting part (201B 1).

5. A transmission component with a flexible shaft as claimed in any one of claims 1 to 4, wherein: the screw thread of the screw connection structure between the rotor fixed end (201 b) and the rotor (3) turns to conform to the steering arrangement of the flexible shaft (201) during operation.

6. A transmission component with a flexible shaft as defined in claim 5, wherein: the screw thread of the screw connection structure between the first nut (202) and the rotor (3) turns to, and is reversely compliant with the steering arrangement of the flexible shaft (201) when in operation.

7. A transmission component with a flexible shaft as claimed in any one of claims 3 to 4, wherein: the periphery spiro union of rotor (3) has pretension nut (4), pretension nut (4) are located first nut (202) face one side of rotor (3), and in rotor (3) to flexible shaft (201) direction is to first nut (202) laminating roof pressure.

8. A screw pump, characterized in that: a transmission member comprising a flexible shaft according to any one of claims 1 to 7.