CN218480049U

CN218480049U - Fixing assembly for pin shaft, arm support device and engineering machinery

Info

Publication number: CN218480049U
Application number: CN202222887189.3U
Authority: CN
Inventors: 李锐
Original assignee: Sany Automobile Manufacturing Co Ltd
Current assignee: Sany Automobile Manufacturing Co Ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-02-14
Anticipated expiration: 2032-10-31

Abstract

The utility model provides a fixed subassembly, cantilever crane device and engineering machine tool for round pin axle relates to engineering machine tool's cantilever crane technical field. The fixing component for the pin shaft comprises a shaft seat, a shaft sleeve and a limiting part. The shaft seat is provided with a mounting hole, the inner peripheral wall of the mounting hole of the shaft seat is provided with at least one first limiting groove, and the first limiting groove extends along the axial direction of the shaft seat and at least penetrates through one end surface of the shaft seat; the inner hole of the shaft sleeve is suitable for mounting the pin shaft, and the shaft sleeve is sleeved in the mounting hole; the outer peripheral wall of the shaft sleeve is provided with at least one second limiting groove, and the second limiting groove extends along the axial direction of the shaft sleeve and at least penetrates through one end face of the shaft sleeve; the second limiting groove and the first limiting groove are correspondingly arranged to form a limiting cavity; the limiting part is detachably arranged in the limiting cavity and is abutted against the first limiting groove and the second limiting groove of the shaft seat. The utility model discloses can solve the easy not hard up problem of axle sleeve of concrete pump truck's cantilever crane articulated shaft among the prior art, have the difficult not hard up effect of axle sleeve connection.

Description

Fixing assembly for pin shaft, arm support device and engineering machinery

Technical Field

The utility model relates to an engineering machine tool's cantilever crane technical field, concretely relates to a fixed subassembly, cantilever crane device and engineering machine tool for round pin axle.

Background

The cantilever type concrete pump truck mainly utilizes pumping power to convey concrete to a specified position along a conveying pipeline. The cantilever crane type concrete pump truck comprises a cantilever crane device which is mainly formed by hinging a multi-section cantilever crane, an oil cylinder and a connecting piece and can realize the expansion under the working state and the folding under the non-working state.

The adjacent arm supports are hinged, at present, the shaft sleeve at the arm support shaft is usually fixed in the shaft hole of the structural part in an interference fit mode, the interference fit can be influenced by a plurality of factors, such as machining tolerance, roughness, fit length, lubrication degree and the like, and the shaft sleeve is easy to loosen under the condition of extreme working conditions or accumulated errors, so that friction is generated between the shaft sleeve and the shaft seat of the arm support, the loss of the shaft sleeve is accelerated, the maintenance cost is increased, and abnormal sound is easy to generate between the loose shaft sleeve and the shaft seat of the arm support.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in overcoming the easy not hard up defect of axle sleeve of concrete pump truck's cantilever crane articulated shaft among the prior art to a fixed subassembly, cantilever crane device and engineering machine tool for round pin axle are provided.

In order to solve the above problem, the utility model discloses an aspect provides a fixed subassembly for round pin axle, including axle bed, axle sleeve and locating part. The shaft seat is provided with a mounting hole, the inner peripheral wall of the mounting hole of the shaft seat is provided with at least one first limiting groove, and the first limiting groove extends along the axial direction of the shaft seat and at least penetrates through one end face of the shaft seat; the inner hole of the shaft sleeve is suitable for mounting the pin shaft, and the shaft sleeve is sleeved in the mounting hole; the outer peripheral wall of the shaft sleeve is provided with at least one second limiting groove, and the second limiting groove extends along the axial direction of the shaft sleeve and at least penetrates through one end face of the shaft sleeve; the second limiting groove and the first limiting groove are correspondingly arranged to form a limiting cavity; the limiting part is detachably arranged in the limiting cavity and is abutted against the first limiting groove and the second limiting groove of the shaft seat.

Optionally, the first limit groove penetrates through two ends of the shaft seat along the axial direction of the shaft seat; the second limiting groove penetrates through two ends of the shaft sleeve along the axial direction of the shaft sleeve.

Optionally, the limiting member is adapted to be inserted into the limiting cavity along the axial direction of the shaft sleeve, and the limiting member includes a pin or a key.

Optionally, the cross section of the limiting cavity along the radial direction of the shaft sleeve is rectangular or circular, and the limiting part is matched with the limiting cavity.

Optionally, the outer circumferential wall of the shaft sleeve and the inner circumferential wall of the shaft seat are in interference fit; and/or the side wall of the limiting piece and the side wall of the limiting cavity are in interference fit.

Optionally, the first limiting grooves are provided with at least two, and two or more than two first limiting grooves are arranged at intervals along the inner peripheral wall of the shaft seat; the second limiting grooves are provided with at least two, and two or more than two second limiting grooves are arranged in one-to-one correspondence with the first limiting grooves.

Optionally, four first limiting grooves are arranged at equal intervals along the inner peripheral wall of the shaft seat; the second spacing groove is equipped with four, and four second spacing grooves are along the even interval setting on the periphery wall of axle sleeve.

A second aspect of the utility model provides an arm support device, including multisection arm support, it is articulated between arbitrary adjacent two sections arm supports, still be equipped with any one of above technical scheme between the articulated two sections arm support be used for the fixed subassembly of round pin axle.

The utility model discloses a third aspect provides an engineering machine tool, including the engineering machine tool body to and any one of above technical scheme fixed subassembly or above technical scheme for the round pin axle the cantilever crane device in, a fixed subassembly for the round pin axle or the cantilever crane device locate on the engineering machine tool body.

Optionally, the engineering machine comprises a concrete pump truck.

The utility model has the advantages of it is following:

1. utilize the technical scheme of the utility model, set up first spacing groove through along its axial on the internal perisporium of the mounting hole at the axle bed, set up the second spacing groove along its axial on the periphery wall of axle sleeve, first spacing groove and the cooperation of second spacing groove constitute spacing chamber, set up the locating part and realize mechanical fixation, increase antitorque performance to the axle sleeve in spacing intracavity. When the two sections of the hinged arm supports rotate relatively, the arm support shaft rotates in the shaft sleeve, torsion is applied to the shaft sleeve, and the inner peripheral wall of the shaft seat applies friction force opposite to the torsion to the outer peripheral wall of the shaft sleeve to offset part of the torsion; in addition, the limiting part can apply an extrusion acting force opposite to the tangential direction of the torsion to the inner wall of the second limiting groove in the limiting cavity, and further offset the residual torsion, so that the outer peripheral wall of the shaft sleeve does not rotate relative to the shaft seat of the arm support, and the problems of friction loss and abnormal sound generated between the shaft sleeve and the shaft seat of the arm support due to looseness in the rotation process of the arm support can be solved.

2. The first limiting groove and the second limiting groove are axially arranged, so that the limiting part can be installed in an axial insertion mode, and the limiting part can be installed and detached more conveniently.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 shows a schematic structural diagram of a fixing assembly for a pin according to an embodiment of the present invention;

FIG. 2 shows a radial cross-section of the axle seat of FIG. 1;

fig. 3 shows a radial cross-section of the bushing in fig. 1.

Description of reference numerals:

1. a shaft seat; 10. mounting holes; 11. a first limit groove; 2. a shaft sleeve; 21. a second limit groove; 3. a limiting member; 4. a boom; 41. an arm support shaft.

Detailed Description

The technical solutions of the present invention will be described more clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

For convenience of describing the technical solution of the present invention, the following detailed description is made with reference to the accompanying drawings and specific examples, but the examples should not be construed as limiting the present invention.

Example 1

A fixing assembly for a pin shaft, referring to fig. 1-3, comprises a shaft seat 1, a shaft sleeve 2 and a limiting part 3. The shaft seat 1 is provided with a mounting hole 10, the inner peripheral wall of the mounting hole 10 of the shaft seat 1 is provided with at least one first limiting groove 11, the first limiting groove 11 extends along the axial direction of the shaft seat 1, and at least one end of the first limiting groove penetrates through the end surface of the shaft seat 1; an inner hole of the shaft sleeve 2 is suitable for mounting a pin shaft, and the shaft sleeve 2 is sleeved in the mounting hole 10; the periphery wall of the shaft sleeve 2 is provided with at least one second limiting groove 21, the second limiting groove 21 extends along the axial direction of the shaft sleeve 2, and at least one end of the second limiting groove penetrates through the end face of the shaft sleeve 2. The second limiting groove 21 and the first limiting groove 11 are correspondingly arranged to form a limiting cavity; the limiting part 3 is detachably arranged in the limiting cavity, and the limiting part 3 is abutted against the first limiting groove 11 and the second limiting groove 21 of the shaft seat 1.

Utilize the technical scheme of the utility model, through set up first spacing groove 11 along its axial on the internal perisporium of the mounting hole 10 of axle bed 1, set up second spacing groove 21 along its axial on the periphery wall of axle sleeve 2, first spacing groove 11 and the cooperation of second spacing groove 21 constitute spacing chamber, set up locating part 3 and realize mechanical fixation, increase antitorque property to axle sleeve 2 in spacing intracavity. The fixing component for the pin shaft provided in this embodiment is suitable for use between various rotating connectors, and here, taking the arm support 4 as an example, the pin shaft is an arm support shaft 41. When the two articulated arm supports 4 rotate relatively, the arm support shaft 41 rotates in the shaft sleeve 2, a torsion is applied to the shaft sleeve 2, and the inner peripheral wall of the shaft seat 1 applies a friction force opposite to the torsion to the outer peripheral wall of the shaft sleeve 2 so as to offset part of the torsion; in addition, the limiting part 3 can apply an extrusion acting force opposite to the tangential direction of the torsion to the inner wall of the second limiting groove 21 in the limiting cavity, so that the residual torsion is further offset, the relative rotation of the outer peripheral wall of the shaft sleeve 2 relative to the shaft seat 1 of the arm support 4 is ensured, and the problems of friction loss and abnormal sound generated between the shaft sleeve 2 and the shaft seat 1 due to looseness in the rotation process of the arm support 4 can be solved.

First spacing groove 11 is along the axial extension of axle bed 1, and runs through an terminal surface of axle bed 1 at least, and second spacing groove 21 is along the axial extension of axle sleeve 2, and runs through an terminal surface of axle sleeve 2 at least, and that is to say, spacing chamber has at least one end to be the opening, can realize that locating part 3 passes through the bayonet installation of axial for the installation and the demolition of locating part 3 are more convenient.

Specifically, the first limiting groove 11 on the shaft seat 1 may have one end penetrating through and the other end not penetrating through, and correspondingly, the second limiting groove 21 on the shaft sleeve 2 is arranged corresponding to the first limiting groove 11. Correspondingly, the length of the limiting part 3 is matched with the lengths of the first limiting groove 11 and the second limiting groove 21. The limiting member 3 can be axially inserted into the limiting cavity from one end of the penetration, namely the opening of the limiting cavity.

As a preferred implementation manner, in this embodiment, the first limiting groove 11 penetrates through two ends of the shaft seat 1 along the axial direction thereof; the second limiting groove 21 penetrates through both ends of the sleeve 2 in the axial direction thereof. Therefore, when the arm support shaft 41 rotates, the contact area between the shaft sleeve 2 and the limiting part 3 is larger, the shaft sleeve 2 is subjected to uniform extrusion acting force applied by the limiting part 3 along the axial direction of the shaft sleeve, and the shaft sleeve 2 is ensured to be firmly connected and not easy to loosen.

Furthermore, the limiting part 3 comprises a plug pin which is suitable for being inserted into the limiting cavity along the axial direction of the shaft sleeve 2.

Of course, in some other embodiments, the limiting member 3 is a key.

Furthermore, the cross section of the limiting cavity along the radial direction of the shaft sleeve 2 is rectangular or circular, and the limiting part 3 is matched with the limiting cavity. Of course, the shape of the cross section of the limiting cavity along the radial direction of the shaft sleeve 2 can be other shapes, and the shape is not limited here.

Furthermore, the outer peripheral wall of the shaft sleeve 2 is in interference fit with the inner peripheral wall of the shaft seat 1; and/or the side wall of the limiting member 3 and the side wall of the limiting cavity are in interference fit. Like this, it is inseparabler to connect between locating part 3, axle bed 1 and the axle sleeve 2, and the mutual extrusion force of three is bigger, and then mutual static friction is bigger, and it is more firm to connect between axle bed 1 and the axle sleeve 2, further improves axle sleeve 2's locking effect.

Further, at least two first limiting grooves 11 are formed in the first limiting groove 11, and two or more first limiting grooves 11 are arranged at intervals along the inner peripheral wall of the shaft seat 1; the second limiting grooves 21 are at least two, and two or more second limiting grooves 21 are arranged in one-to-one correspondence with the first limiting grooves 11. The matching of two or more first limiting grooves 11 and second limiting grooves 21 can improve the torsion resistance of the shaft sleeve 2, and further prevent the shaft sleeve 2 from being fixed firmly and not easy to loosen when the arm support shaft 41 rotates.

Further, in this embodiment, four first limiting grooves 11 are provided, and the four first limiting grooves 11 are uniformly arranged at intervals along the inner peripheral wall of the shaft seat 1; the number of the second limiting grooves 21 is four, and the four second limiting grooves 21 are uniformly arranged on the peripheral wall of the shaft sleeve 2 at intervals. Therefore, the circumferential stress of the shaft sleeve 2 can be uniform, and the connection stability of the shaft sleeve 2 is further improved.

Example 2

An arm support device comprises a plurality of sections of arm supports 4, any two adjacent sections of arm supports 4 are hinged, and a fixing component for a pin shaft in embodiment 1 is further arranged between the two hinged sections of arm supports 4.

Specifically, the arm shaft 41 is rotatably fitted in the boss 2.

Since the arm support device includes the fixing component for the pin shaft in embodiment 1, the arm support device has the same technical effect as the fixing component for the pin shaft, and details are not repeated here.

Example 3

An engineering machine comprises an engineering machine body and the arm support device in embodiment 2, wherein the arm support device is arranged on the engineering machine body.

Further, the engineering machinery comprises a concrete pump truck, a crane, a fire truck and an excavator.

Since the engineering machinery includes the boom device in embodiment 2, the engineering machinery also has all the technical effects of the boom device, and details are not described here.

Of course, in some other embodiments, the construction machine includes the fixing assembly for the pin shaft described in embodiment 1, but does not include the arm support device.

According to the above description, the present patent application has the following advantages:

1. the limiting piece 3 has an extrusion effect on the side wall of the second limiting groove 21 of the shaft sleeve 2, can resist the torsion generated by the shaft sleeve 2 when the arm support shaft 41 rotates, and ensures that the shaft sleeve 2 is firmly connected and is not easy to loosen, so that no friction loss and abnormal sound can be generated between the shaft sleeve 2 and the shaft seat 1;

2. the first limiting groove 11 and the second limiting groove 21 are axially arranged, so that the shaft sleeve 2 and the limiting part 3 can be installed in an axial insertion mode, and the shaft sleeve 2 and the limiting part 3 can be installed and dismantled more conveniently.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications derived therefrom are intended to be within the scope of the invention.

Claims

1. A fixed subassembly for round pin axle, its characterized in that includes:

the bearing comprises a shaft seat (1), wherein a mounting hole (10) is formed in the shaft seat (1), at least one first limiting groove (11) is formed in the inner peripheral wall of the mounting hole (10) of the shaft seat (1), and the first limiting groove (11) extends along the axial direction of the shaft seat (1) and at least penetrates through one end face of the shaft seat (1);

the inner hole of the shaft sleeve (2) is suitable for mounting a pin shaft, the shaft sleeve (2) is sleeved in the mounting hole (10), at least one second limiting groove (21) is formed in the peripheral wall of the shaft sleeve (2), and the second limiting groove (21) extends in the axial direction of the shaft sleeve (2) and at least penetrates through one end face of the shaft sleeve (2); the second limiting groove (21) and the first limiting groove (11) are correspondingly arranged to form a limiting cavity;

the limiting piece (3) is detachably arranged in the limiting cavity, and the limiting piece (3) is abutted to the first limiting groove (11) and the second limiting groove (21) of the shaft seat (1).

2. The fixing assembly for the pin shaft according to claim 1, wherein the first limiting groove (11) penetrates through two ends of the shaft seat (1) along the axial direction thereof; the second limiting groove (21) penetrates through two ends of the shaft sleeve (2) along the axial direction of the shaft sleeve.

3. The fastening assembly for a pin shaft according to claim 1 or 2, wherein the retaining member (3) is adapted to be inserted into the retaining cavity in the axial direction of the shaft sleeve (2), and the retaining member (3) comprises a pin or a key.

4. The fastening assembly for a pin shaft according to claim 1 or 2, wherein the cross section of the limiting cavity along the radial direction of the shaft sleeve (2) is rectangular or circular, and the limiting member (3) is adapted to the limiting cavity.

5. A fixing assembly for a pin shaft according to claim 1 or 2, characterized in that the outer peripheral wall of the sleeve (2) and the inner peripheral wall of the shaft seat (1) are in interference fit; and/or the side wall of the limiting piece (3) is in interference fit with the side wall of the limiting cavity.

6. The fixing assembly for the pin shaft according to claim 1 or 2, wherein the number of the first limiting grooves (11) is at least two, and at least two of the first limiting grooves (11) are arranged at intervals along the inner peripheral wall of the shaft seat (1);

the number of the second limiting grooves (21) is at least two, and the at least two second limiting grooves (21) are in one-to-one correspondence with the first limiting grooves (11).

7. The fixing assembly for the pin shaft according to claim 6, wherein the number of the first limiting grooves (11) is four, and the four first limiting grooves (11) are uniformly arranged at intervals along the inner peripheral wall of the shaft seat (1); the number of the second limiting grooves (21) is four, and the second limiting grooves (21) are evenly arranged on the peripheral wall of the shaft sleeve (2) at intervals.

8. An arm support device, characterized by comprising a plurality of sections of arm supports (4), wherein any two adjacent sections of the arm supports (4) are hinged, and the fixing component for the pin shaft as claimed in any one of claims 1 to 7 is arranged between the two hinged sections of the arm supports (4).

9. An engineering machine is characterized by comprising an engineering machine body and the fixing component for the pin shaft in any one of claims 1 to 7 or the arm support device in claim 8, wherein the fixing component for the pin shaft or the arm support device is arranged on the engineering machine body.

10. The work machine of claim 9, wherein the work machine comprises a concrete pump truck.