Mechanical interlocking anti-loosening structure at transmission output flange

Abstract

According to the mechanical interlocking anti-loosening structure on the transmission output flange, the flange nut and the main shaft structure are finely adjusted, and the anti-loosening washer and the head bolt are additionally arranged, so that the anti-loosening purpose is achieved through mechanical limiting; the structure is convenient and easy to achieve, meanwhile, the common flange nut loosening problem in the prior art is solved through a low-cost scheme, and the flange nut is suitable for industrial large-scale use and popularization.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of transmission output shaft, in particular to a mechanical interlocking anti-loose structure at the transmission output flange. BACKGROUND

[0002] The flange nut is a main auxiliary box main shaft fastening device, which is used for reliably connecting the transmission output shaft, flange plate and vehicle transmission shaft and is widely used in the field of transmission.

[0003] During the after-sales use of the conventional flange nut, the threads are repeatedly subjected to radial load and tend to elastically twist and deform, and the deformation accumulates, which finally leads to the displacement of the twisted deformation, thereby causing the flange nut to loosen, the vehicle power to be interrupted and the loosening to be unable to be effectively prevented. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a mechanical interlocking anti-loose structure at the transmission output flange to solve the problem that the conventional flange nut cannot effectively prevent loosening.

[0005] In order to solve the above technical problem, the utility model adopts the following technical scheme:

[0006] A mechanical interlocking anti-loose structure at the transmission output flange comprises a main shaft and a flange nut, the main shaft is divided into an upper part and a lower part, the upper part of the main shaft is a connecting shaft, the outer diameter of the connecting shaft is smaller than that of the lower part of the main shaft, the flange nut is screwed on the outside of the connecting shaft, the lower end surface of the flange nut is in close contact with the upper end surface of the lower part of the main shaft, and a head bolt is further included.

[0007] An internal thread hole is formed in the connecting shaft, the internal thread hole is collinear with the central shaft of the main shaft, and the external thread of the connecting shaft is opposite to the thread direction of the internal thread hole.

[0008] A fixing plate is arranged on the upper end of the flange nut, the fixing plate is provided with a hole in the middle, and the head bolt can be screwed with the main shaft by penetrating into the internal thread hole from the middle of the fixing plate.

[0009] An output flange plate is coaxially fixed on the main shaft, the output flange plate comprises a cylindrical connecting part and a fixing part, the upper end surface of the connecting part is flush with the upper end surface of the main shaft, the fixing part is coaxially fixed on the upper part of the connecting part, and the fixing plate can be clamped on the upper end of the connecting part.

[0010] The utility model further has the following characteristics:

[0011] Further, the flange nut lower end face and the upper end face of the main shaft are provided with a lock washer.

[0012] The outer circle of the upper end face of the lock washer is provided with a plurality of positioning pins in the circumferential direction, and the flange nut is provided with a plurality of positioning holes corresponding to the plurality of positioning pins.

[0013] Further, the head bolt top is provided with a plurality of through holes.

[0014] Further, the outer circle of the upper end face of the lock washer is provided with two positioning pins.

[0015] The mechanical interlocking anti-loose structure of the transmission output flange of the utility model adjusts the flange nut and the main shaft structure, and increases the lock washer and the head bolt, so that the anti-loose purpose is realized through mechanical limiting, and the common flange nut loosening problem in the prior art is solved through a low-cost solution while the structure is convenient and easy to realize, so that it is suitable for large-scale use and promotion in industry. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The mechanical interlocking anti-loose structure of the transmission output flange of the utility model is a sectional view.

[0017] Figure 2 The mechanical interlocking anti-loose structure of the transmission output flange of the utility model is an exploded view.

[0018] The meanings of the various reference numerals in the drawings are as follows:

[0019] 1, main shaft; 2, flange nut; 3, connecting shaft; 4, head bolt; 5, internal thread hole; 6, fixed plate; 7, flange plate; 8, lock washer; 9, positioning pin; 10, positioning hole; 701, connecting part; 702, fixed part. DETAILED DESCRIPTION

[0020] It should be noted that all components in the utility model, such as no special description, all adopt the components known in the prior art. For example, the commonly used main shaft is known.

[0021] The following gives a specific embodiment of the utility model, and it should be noted that the utility model is not limited to the following specific embodiments, and any equivalent transformation based on the technical scheme of the application falls within the protection scope of the utility model.

[0022] For example, Figure 1 And Figure 2As shown, a mechanical interlocking anti-loosening structure at the output flange of a transmission includes a main shaft 1 and a flange nut 2. The upper portion of the main shaft 1 is coaxially fixed with a connecting shaft 3, and the outer diameter of the connecting shaft 3 is smaller than that of the main shaft 1. The connecting shaft 3 is provided with an external thread, and the inner ring of the flange nut 2 is provided with an internal thread. The flange nut 2 can be threadedly connected to the connecting shaft 3, and the lower end surface of the flange nut 2 is in contact with the upper end surface of the main shaft 1. A head bolt 4 is also included.

[0023] An internal threaded hole 5 is provided on the upper portion of the main shaft 1, and the internal threaded hole 5 is collinear with the central axis of the main shaft 1; the external thread of the connecting shaft 3 is a positive thread, and the thread of the internal threaded hole 5 is a negative thread;

[0024] A fixing plate 6 is provided at the upper end of the flange nut 2 , and a hole is opened in the middle of the fixing plate 6 ; the head bolt 4 can be threadedly connected to the main shaft 1 by entering the internal threaded hole 5 from the middle of the fixing plate 6 .

[0025] An output flange 7 is provided on the coaxial fixed sleeve of the main shaft 1;

[0026] The output flange 7 includes a cylindrical connecting portion 701 and a fixing portion 702 . The upper end surface of the connecting portion 701 is flush with the upper end surface of the main shaft 1 . The fixing portion 702 is coaxially fixedly sleeved on the upper portion of the connecting portion 701 . The fixing plate 6 can be clamped on the upper end of the connecting portion 701 .

[0027] As a preferred solution, an anti-loosening washer 8 is provided between the lower end surface of the flange nut 2 and the upper end surface of the main shaft 1;

[0028] The outer ring of the upper end surface of the anti-loosening washer 8 is circumferentially provided with a plurality of positioning pins 9, and the outer periphery of the flange nut 2 is provided with positioning holes 10 corresponding to the plurality of positioning pins 9. Specifically, two can be provided, respectively provided on both sides of the outer periphery of the flange nut 2.

[0029] The connection strength between the flange nut 2 and the main shaft 1 is strengthened to further prevent loosening.

[0030] Further preferably, a plurality of through holes are formed on the top of the head bolt 4 .

[0031] The specific implementation of the utility model is given below, which includes the following steps:

[0032] Step 1: Pass the output flange 7 through the main shaft 1 and fix it in the corresponding position.

[0033] Step 2: Align the positioning pins 9 of the anti-loosening washer 8 with the positioning holes 10 that penetrate into the flange nut 2.

[0034] Step 3: Screw the flange nut 2 and the anti-loosening washer 8 together into the threaded position of the connecting shaft 3 of the main shaft 1 and tighten them to the required torque (both are positive threads).

[0035] Fourth step: Put the bolt 4 into the threaded hole of the upper end of the spindle 1 (all are reverse threads), and fix the torque.

[0036] Fifth step: Put the fixed steel wire through the anti-loose washer 8 and the small hole of the top of the bolt 4 in the shape of 8, and tighten it.

[0037] According to the above 5 steps, the assembly is completed.

[0038] After installation, because the bolt 4 is screwed into the threaded hole of the upper end of the spindle 1 as a reverse thread connection, even if the flange nut 2 has a tendency to loosen the threads, the bolt 4 will not rotate in the opposite direction, but the tightening force will be tighter, thereby achieving the purpose of preventing loosening.

Claims

1. A mechanical interlocking anti-loosening structure at a transmission output flange, comprising a main shaft (1) and a flange nut (2), the main shaft (1) being divided into an upper part and a lower part, the upper part of the main shaft (1) being a connecting shaft (3), the connecting shaft (3) having an outer diameter smaller than the lower part of the main shaft (1); the flange nut (2) being screwed onto the outside of the connecting shaft (3); the lower end surface of the flange nut (2) being in abutment with the upper end surface of the lower part of the main shaft (1), characterized in that, Also include head bolts (4); The connecting shaft (3) is provided with an internal thread hole (5), the internal thread hole (5) is collinear with the central axis of the main shaft (1), the external thread of the connecting shaft (3) is opposite to the thread direction of the internal thread hole (5); The flange nut (2) is provided with a fixed plate (6) at the upper end, the fixed plate (6) is provided with a hole in the middle, the head bolt (4) can be screwed with the main shaft (1) by entering the internal thread hole (5) from the middle of the fixed plate (6); The main shaft (1) is coaxially fixed with an output flange (7), the output flange (7) includes a cylindrical connecting part (701) and a fixed part (702), the upper end surface of the connecting part (701) is flush with the upper end surface of the main shaft (1), the fixed part (702) is coaxially fixed on the upper part of the connecting part (701), and the fixed plate (6) can be clamped on the upper end of the connecting part (701).

2. The mechanical interlock anti-loose structure at the transmission output flange according to claim 1, characterized in that, The lower end surface of the flange nut (2) and the upper end surface of the main shaft (1) are provided with a lock washer (8); The outer circle of the upper end surface of the lock washer (8) is provided with a plurality of positioning pins (9) in the circumferential direction, and the outer periphery of the flange nut (2) is provided with a plurality of positioning holes (10) corresponding to the plurality of positioning pins (9).

3. The mechanical interlock anti-loose structure at the transmission output flange according to claim 2, characterized in that, The head bolt (4) is provided with a plurality of through holes at the top.

4. The mechanical interlock anti-loose structure at the transmission output flange according to claim 2, characterized in that, The outer circle of the upper end surface of the lock washer (8) is provided with two positioning pins (9) in the circumferential direction.

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