A self-locking baffle assembly structure for a pin shaft

Abstract

The present application belongs to the technical field of pin shaft connection, and particularly relates to a self-locking baffle assembly structure for pin shaft; the self-locking baffle assembly structure comprises a pin shaft, a baffle, an installation lug plate and a limiting plate; one shaft end of the pin shaft is provided with a boss, the pin shaft is installed in a shaft hole of the installation lug plate, and the boss is blocked on the surface of the installation lug plate at a lower plane; the side surface of the boss is provided with a first acting surface, and the end surface of the pin shaft is exposed at the first acting surface; the limiting plate is fixed on the installation lug plate, the baffle is tightly fixed on the installation lug plate by a fixing bolt with the back of the limiting plate; the bottom surface of the baffle presses the exposed end surface of the pin shaft to limit the axial movement of the pin shaft, and the second acting surface of the side surface of the baffle cooperates with the first acting surface of the boss to limit the rotation of the pin shaft; through the present application, the pin shaft fixing in the pin shaft connection assembly is realized, the wear and failure of the shaft hole of the installation lug plate are avoided, the lug plate shaft sleeve is saved, and the equipment maintenance and maintenance cost are reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of pin shaft connection, and particularly relates to a self-locking baffle assembly structure for a pin shaft. BACKGROUND

[0002] In the operation process of mechanical equipment, in order to prevent large pin shafts from rotating and moving out, the following several ways are generally used for limiting: flange disc axial fixing way, radial small pin shaft fixing way (such as the pin shaft anti-rotation fixing device disclosed in publication No. CN105257655A), and blocking pin plate clamping fixing way.

[0003] The above several fixing ways have high requirements for pin shaft assembly, generally require that the radial angle of the pin shaft meets the bolt fixing requirement, and the pin shaft is difficult to adjust in the tight fit. In addition, there is an assembly gap between the bolt and the bolt hole, and between the blocking pin plate and the clamping groove. Under the action of vibration load and impact load, the pin shaft can still rotate or move in the small gap. Therefore, the existing pin shaft fixing principle cannot limit the rotation of the pin shaft. The radial small pin shaft fixing way and the blocking pin plate clamping fixing way cannot even avoid the axial movement of the pin shaft.

[0004] Due to the difference in hardness between the pin shaft and the shaft hole, the action of the pin shaft inevitably causes abrasion to the shaft hole, causing wear of the shaft hole, loss of the mechanical and kinematic effects of the pin shaft device, and damage to important ear plate components, thereby increasing the cost of later maintenance and repair of the equipment. SUMMARY

[0005] The present application is to solve the problem of radial rotation and axial movement of the pin shaft under the action of alternating load, impact load and the like, to avoid wear of the mounting ear plate shaft hole, and to reduce the cost of later maintenance and repair of important ear plate assemblies.

[0006] The present application provides the following technical solution: a self-locking baffle assembly structure for a pin shaft, comprising a pin shaft, a baffle, a mounting ear plate and a limiting plate.

[0007] One end of the pin shaft is provided with a boss, the pin shaft is installed in the shaft hole of the mounting ear plate, and the lower plane of the boss is stopped on the surface of the mounting ear plate.

[0008] The side surface of the boss has a first acting surface, and the end surface of the pin shaft is exposed at the first acting surface.

[0009] The limiting plate is fixed on the mounting ear plate, and the baffle is tightly fastened on the mounting ear plate by the fixing bolt. The bottom surface of the baffle presses the exposed end surface of the pin shaft to limit the axial movement of the pin shaft, and the second acting surface of the side surface of the baffle cooperates with the first acting surface of the boss to limit the rotation of the pin shaft.

[0010] Further, the first action surface is a clamping plane perpendicular to the pin shaft end surface, the extension planes of the two side surfaces of the baffle are oblique, the two side surfaces are a pin shaft side clamping action surface and a limiting plate side clamping action surface respectively, the limiting plate side clamping action surface is perpendicular to the radial direction of the pin shaft, the limiting plate side clamping action surface is attached to the limiting plate, and the pin shaft side clamping action surface is attached to the clamping plane.

[0011] Further, the baffle is fixed by two fixing bolts, and each of the two sides of the pin shaft center line on the baffle has a long hole, the long hole is parallel to the limiting plate side clamping action surface, and the top surface of the baffle at the long hole is provided as an inclined surface, the top end of the inclined surface faces the large end of the baffle, and the bottom end faces the small end of the baffle.

[0012] Further, the baffle is fixed by two fixing bolts, and each of the two sides of the pin shaft center line on the baffle has a long hole, the long hole is parallel to the limiting plate side clamping action surface, and the top surface of the baffle at the long hole is provided as an inclined surface, the top end of the inclined surface faces the large end of the baffle, and the bottom end faces the small end of the baffle.

[0013] Further, the long hole is an open long hole.

[0014] Further, the baffle is fixed by two fixing bolts, and each of the two sides of the pin shaft center line on the baffle has a long hole, the long hole is parallel to the limiting plate side clamping action surface, and the top surface of the baffle at the long hole is provided as an inclined surface, the top end of the inclined surface faces the large end of the baffle, and the bottom end faces the small end of the baffle.

[0015] Further, the baffle is fixed by two fixing bolts, and each of the two sides of the pin shaft center line on the baffle has a long hole, the long hole is parallel to the limiting plate side clamping action surface, and the top surface of the baffle at the long hole is provided as an inclined surface, the top end of the inclined surface faces the large end of the baffle, and the bottom end faces the small end of the baffle.

[0016] Compared with the prior art, the advantages of the present application are that:

[0017] Through the present application, the pin shaft fixing in the pin shaft connecting assembly is realized, the wear and failure of the shaft hole of the mounting ear plate are avoided, the ear plate shaft sleeve is saved, and the equipment maintenance and maintenance cost are reduced.

[0018] The baffle, the pin shaft and the limiting plate interact to form a self-locking wedge mechanism, so that the trapezoidal baffle cannot move from the lower bottom to the upper bottom end, and the rotation of the pin shaft in one direction is prevented; the baffle, the square inclined washer and the mounting ear plate form another self-locking wedge mechanism, under the pre-tightening force of the fixing bolt, the baffle is effectively fixed, and the baffle cannot move from the upper bottom to the lower bottom end, so that the rotation of the pin shaft in another direction is prevented. The pin shaft is axially limited by the lower flat surface of the boss and the small-diameter upper end surface, and the fixing bolt passes through the square inclined washer and the long hole of the baffle to fix the baffle, so that the pin shaft is axially fixed in two directions.

[0019] When the baffle is installed, the pin shaft can be automatically rotated to the correct orientation under the double-plane guiding action of the limiting plate and the pin shaft clamping plane, the self-adaptation of the pin shaft installation position is realized, the pin shaft installation difficulty is reduced, and the assembly efficiency is improved. Since the baffle installation has spatial self-compensation, the requirements for pin shaft design, machining and limiting plate welding positioning are low, and the production and manufacturing cost of the device can be greatly reduced.

[0020] The fixing method has simple structure and reliable function, and is especially suitable for the working condition application of the pin shaft and the small space of the ear plate. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 Figure is a pin shaft self-locking baffle assembly structure schematic diagram;

[0022] Fig. 2 Figure is a mounting ear plate schematic diagram;

[0023] Fig. 3 Figure is a pin shaft schematic diagram;

[0024] Fig. 4 Figure is a baffle schematic diagram (A type);

[0025] Fig. 5 Figure is a baffle schematic diagram (B type);

[0026] Fig. 6 Figure is a square inclined washer schematic diagram.

[0027] In the figure: 1-mounting ear plate; 1.1-shaft hole; 1.2-fixing threaded hole; 2-pin shaft; 2.1- boss; 2.2-clamping flat surface; 2.3-boss lower flat surface; 2.4-small diameter upper end surface; 3-limiting plate; 4-baffle; 4.1-long hole; 4.2-pin shaft side clamping action surface; 4.3-limiting plate side clamping action surface; 4.4-ear plate-small diameter upper end surface action surface; 4.5-square inclined washer action inclined surface; 5-square inclined washer; 6-fixing bolt. DETAILED DESCRIPTION

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0029] As Figs. 1-6 shown: a pin shaft self-locking baffle assembly structure, including mounting ear plate 1, pin shaft 2, limiting plate 3, baffle 4, square inclined washer 5, fixing bolt 6.

[0030] The connecting method of each component: the mounting lug plate 1 is a carrier, arranged with two fixed threaded holes 1.2; the lower flat surface 2.3 of the pin shaft 2 is tightly installed in the shaft hole 1.1 of the mounting lug plate 1; the length direction of the limiting plate 3 is parallel to the center line of the threaded hole of the mounting lug plate 1 and is welded on one side of the shaft hole of the mounting lug plate 1; the baffle 4 is wedge-shaped and clamped between the pin shaft 2 and the limiting plate 3; two square inclined washers 5 are arranged on the upper part of the long hole of the baffle 4; two fixed bolts 6 are fixed in the fixed threaded holes 1.2 of the mounting lug plate 1 through the square inclined washers 5 and the long hole or long opening of the baffle 4.

[0031] The main outer contour of the baffle 4 is approximately a right trapezoid, and a long hole (A-type baffle) or a long opening (B-type baffle) consistent with the height direction is arranged at the upper base and the lower base of the baffle 4, and the top surface of the baffle at the long hole or long opening is arranged as an inclined surface, the top end of the inclined surface is directed to the large end of the baffle 4, and the bottom end is directed to the small end of the baffle 4.

[0032] The baffle 4, the square inclined washer 5 and the fixed bolt 6 form a wedge-shaped self-locking device to prevent the baffle 4 from moving towards the large end under the action of the pin shaft 2 to cause the pin shaft 2 to rotate in one direction; the two clamping and rotating surfaces of the baffle 4 and the pin shaft 2 and the limiting plate 3 form another wedge-shaped self-locking device to prevent the pin shaft 2 from rotating in another direction. The limiting plate 3, the baffle 4, the square inclined washer 5 and the fixed bolt 6 jointly prevent the pin shaft 2 from rotating. The lower flat surface of the boss of the pin shaft 2 limits the movement of the pin shaft 2 towards the small diameter end; the baffle 4 is pressed against the small diameter upper end surface of the pin shaft 2 under the action of the fixed bolt 6 to limit the movement of the pin shaft 2 towards the boss end.

[0033] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A self-locking baffle assembly structure for a pin shaft, characterized by: It comprises a pin shaft (2), a baffle (4), a mounting lug plate (1) and a limiting plate (3). One end of the pin shaft (2) is provided with a boss (2.1), the pin shaft (2) is installed in the shaft hole (1.1) of the mounting lug plate (1), and the lower plane (2.3) of the boss is stopped on the surface of the mounting lug plate. The side surface of the boss (2.1) has a first acting surface, and the end surface of the pin shaft (2) is exposed at the first acting surface. The limiting plate (3) is fixed on the mounting lug plate (1), the baffle (4) is tightly fixed on the mounting lug plate (1) by the fixing bolt (6) and leans against the limiting plate (3), the bottom surface of the baffle (4) presses the exposed end surface of the pin shaft (2) to limit the axial movement of the pin shaft (2), and the second acting surface of the side surface of the baffle (4) cooperates with the first acting surface of the boss (2.1) to limit the rotation of the pin shaft (2). The first acting surface is a clamping plane (2.2) perpendicular to the end surface of the pin shaft, the extension planes of the two side vertical surfaces of the baffle (4) are oblique, the two side vertical surfaces are a pin shaft side clamping acting surface (4.2) and a limiting plate side clamping acting surface (4.3) respectively, the limiting plate side clamping acting surface (4.3) is perpendicular to the radial direction of the pin shaft (2), the limiting plate side clamping acting surface (4.3) is attached to the limiting plate (3), and the pin shaft side clamping acting surface (4.2) is attached to the clamping plane (2.2). The baffle (4) is fixed by two fixing bolts (6), there is one long hole (4.1) on the baffle (4) on both sides of the center line of the pin shaft (2), the long hole (4.1) is parallel to the limiting plate side clamping acting surface (4.3), the top surface of the baffle at the long hole (4.1) is provided as an inclined surface, the top end of the inclined surface faces the large end of the baffle (4), and the bottom end faces the small end of the baffle (4). It also comprises a square and inclined washer (5), the hole matched with the fixing bolt (6) is a circular hole, the bottom surface of the square and inclined washer (5) is an inclined surface matched with the long hole (4.1), and the top surface is a plane; the fixing bolt (6) passes through the square and inclined washer (5) and the long hole (4.1) of the baffle (4) and is connected to the fixing threaded hole (1.2) of the mounting lug plate (1).

2. The self-locking baffle assembly structure for a pin shaft according to claim 1, characterized in that: The long hole (4.1) is an open long hole.

3. The self-locking baffle assembly structure for a pin shaft according to claim 1, characterized in that: The boss (2.1) is a circular boss coaxial with the pin shaft (2), and the boss (2.1) is cut to form the clamping plane (2.2) and the exposed end surface of the pin shaft (2).

4. The self-locking baffle assembly structure for a pin shaft according to claim 1, characterized in that: The limiting plate (3) is a rectangular block.

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