Locking structure for hydraulic support connector and scraper lug plate

Abstract

The utility model relates to the technical field of mining machinery, in particular to a locking structure of a hydraulic support connector and a scraper lug plate, which comprises a hinge pin shaft, two inner semi-ring chucks, a pressure plate and a cotter pin, a limit block is arranged at one end of the hinge pin shaft, an annular groove is arranged on one side of the hinge pin shaft far away from the limit block, the two inner semi-ring chucks are arranged in the annular groove, and the cotter pin is arranged in the annular groove. The two inner semi-ring chucks are symmetrically arranged, and the inner sides of the two inner semi-ring chucks are inserted into the annular groove; the hinge pin shaft is sleeved with the pressing disc, a sinking groove is formed in the side, close to the inner semi-ring chuck, of the pressing disc, the sinking groove limits the inner semi-ring chuck in the radial direction, a through hole is formed in the hinge pin shaft in the radial direction, a positioning hole matched with the through hole is formed in the pressing disc, and the cotter pin penetrates through the positioning hole and the through hole at the same time. The inner semi-ring chuck is used for axially limiting the hinge pin shaft, and the pressure plate is used for radially limiting the inner semi-ring chuck, so that the position of the inner semi-ring chuck is locked, and the situation that threads are rusted is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of mining machinery, and more specifically to a locking structure of a hydraulic support connector and a scraper ear plate. Background Art

[0002] As the main equipment of coal mining working face, hydraulic support and scraper are widely used in comprehensive mining working face. At present, the hydraulic support and scraper are connected by hinged pins to connect the connector on the hydraulic support and the scraper baffle groove ear plate, and then the pin is locked by bolts to achieve the linkage between the hydraulic support and the scraper. However, since the connector is close to the bottom plate of the coal mining working face, there is a lot of water and humidity underground, and the working environment is harsh, the bolts and nuts used to fix the pins often rust and the nuts cannot be removed, and the threads are often worn or deformed, which makes it impossible to remove the nuts, seriously affecting the replacement of the hinged pins.

[0003] Therefore, it is necessary to improve the prior art. Utility Model Content

[0004] In order to overcome the deficiencies in the prior art, a locking structure for a hydraulic support connector and a scraper lug that is convenient for installation and disassembly is provided.

[0005] In order to solve the above problems, the technical solution of the utility model is:

[0006] A locking structure for a hydraulic support connecting head and a scraper ear plate, comprising a hinge pin, an inner half ring chuck, a pressure plate and a split pin, wherein a limit block is arranged at one end of the hinge pin, an annular groove is arranged at a side of the hinge pin away from the limit block, two inner half ring chucks are arranged symmetrically and the inner sides of the two inner half ring chucks are both inserted into the annular groove;

[0007] The pressure plate is sleeved on the hinge pin shaft, and a countersunk groove is provided on the side of the pressure plate close to the inner half-ring chuck. The countersunk groove radially limits the inner half-ring chuck. A through hole is radially provided on the hinge pin shaft, and a positioning hole matching the through hole is provided on the pressure plate, and the open pin passes through the positioning hole and the through hole at the same time.

[0008] Preferably, an outer boss is provided on a side of the inner half-ring chuck close to the pressure plate, and the outer boss is located between the outer annular surface of the hinge pin and the inner annular surface of the recess.

[0009] Preferably, it also includes a hydraulic support connecting head and a scraper ear plate, wherein the hydraulic support connecting head and the scraper ear plate are provided with coaxial connecting holes, and the hinge pin shaft passes through the connecting holes of the hydraulic support connecting head and the scraper ear plate at the same time.

[0010] Preferably, washers are provided between the limit block and the scraper ear plate, and between the inner semi-ring chuck and the scraper ear plate.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. The utility model adopts an inner half-ring chuck to axially limit the hinge pin, uses a pressure plate to radially limit the inner half-ring chuck, and then uses a cotter pin to axially limit the pressure plate, thereby locking the position of the inner half-ring chuck, avoiding the occurrence of rust on the thread, and further avoiding the hinge pin from being unable to be disassembled.

[0013] 2. In the utility model, the axial force of the hinge pin is borne by the inner half ring chuck, which prevents the split pin from being broken due to a large shear force. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the inner half ring chuck structure.

[0016] Figure markings: 1-hinge pin, 2-inner half ring chuck, 3-pressure plate, 4-open pin, 5-limit block, 6-annular groove, 7-sunk groove, 8-positioning hole, 9-external boss, 10-hydraulic support connector, 11-scraper ear plate, 12-washer. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] like Figure 1 , Figure 2 As shown, a locking structure of a hydraulic support connector and a scraper ear plate includes a hinge pin 1, an inner half ring chuck 2, a pressure plate 3, a cotter pin 4, a hydraulic support connector 10 and a scraper ear plate 11. Coaxial connecting holes are provided on the hydraulic support connector 10 and the scraper ear plate 11. The hinge pin 1 also passes through the connecting holes of the hydraulic support connector 10 and the scraper ear plate 11 to achieve locking of the hydraulic support connector 10 and the scraper ear plate 11.

[0019] A limit block 5 is provided at one end of the articulated pin shaft 1, and the limit block 5 is used to achieve limitation on one side of the scraper ear plate 11. An annular groove 6 is provided on the side of the articulated pin shaft 1 away from the limit block 5. Two inner semi-ring chucks 2 are provided, and the two inner semi-ring chucks 2 are symmetrically arranged and the inner sides are both inserted into the annular groove 6. The axial limitation of the articulated pin shaft 1 and the scraper frame ear plate 11 is achieved by the two inner semi-ring chucks 2 to prevent the articulated pin shaft 1 from axial movement, thereby ensuring the reliable connection of the articulated pin shaft 1 to the hydraulic support connector 10 and the scraper ear plate 11.

[0020] In order to prevent the inner half-ring chuck 2 from falling off, the pressure plate 3 is sleeved on the hinge pin shaft 1, and a recessed groove 7 is provided on the side of the pressure plate 3 close to the inner half-ring chuck 2. The recessed groove 7 radially limits the inner half-ring chuck 2. Preferably, an outer boss 9 is provided on the side of the inner half-ring chuck 2 close to the pressure plate 3. The outer boss 9 is located between the outer ring surface of the hinge pin shaft 1 and the inner ring surface of the recessed groove 7. By providing the outer boss 9, it is convenient to partially insert the inner half-ring chuck 2 into the recessed groove 7.

[0021] A through hole is radially arranged on the hinge pin shaft 1 , a positioning hole 8 matching with the through hole is arranged on the pressure plate 3 , and the cotter pin 4 passes through the positioning hole 8 and the through hole at the same time, so as to lock the pressure plate 3 and the hinge pin shaft 1 .

[0022] In order to reduce the wear of the limit block 5 and the inner half-ring chuck 2, washers 12 are provided between the limit block 5 and the scraper ear plate 11, and between the inner half-ring chuck 2 and the scraper ear plate 11, so as to increase the service life of other parts by reducing the wear of the washers 12.

[0023] Working principle:

[0024] When in use, the hinge pin 1 is passed through the hydraulic support connector 10 and the scraper ear plate 11 to hinge the two together, and at the same time, a washer 12 is placed on the side of the hinge pin 1 close to the limit block 5. At this time, the other side of the hinge pin 1 is exposed. First, put another washer 12, and then insert the two inner half-ring chucks 2 into the annular groove 6 at the exposed end of the hinge pin 1 to limit the axial freedom of the hinge pin 1, and then put the pressure plate 3 onto the outer ring of the two inner half-ring chucks 2, and at the same time align the positioning hole 8 on the pressure plate 3 with the through hole on the hinge pin 1, and finally insert the cotter pin 4 to fix the pressure plate 3 and the hinge pin 1.

[0025] When disassembly is required, first remove the cotter pin 84, then take out the pressure plate 3, and then remove the two inner half-ring chucks 2 from the annular groove 6 of the hinge pin shaft 1. At this time, the hinge pin shaft 1 and the washer 12 can be pulled out to realize the disassembly of the hydraulic support connector 10 and the scraper ear plate 11.

[0026] Only the preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention, and various changes should be included in the protection scope of the present invention.

Claims

1. A locking structure for a hydraulic support connector and a scraper lug, characterized in that: It comprises a hinge pin shaft (1), an inner half-ring chuck (2), a pressure plate (3) and a split pin (4), wherein a limit block (5) is arranged at one end of the hinge pin shaft (1), an annular groove (6) is arranged at a side of the hinge pin shaft (1) away from the limit block (5), and two inner half-ring chucks (2) are arranged symmetrically and the inner sides of both inner half-ring chucks (2) are inserted into the annular groove (6); The pressure plate (3) is sleeved on the hinge pin shaft (1), and a recessed groove (7) is provided on one side of the pressure plate (3) close to the inner semi-ring chuck (2). The recessed groove (7) radially limits the inner semi-ring chuck (2). A through hole is radially provided on the hinge pin shaft (1), and a positioning hole (8) cooperating with the through hole is provided on the pressure plate (3). The cotter pin (4) passes through the positioning hole (8) and the through hole at the same time.

2. The locking structure of the hydraulic support connector and the scraper ear plate according to claim 1 is characterized in that: An outer boss (9) is provided on one side of the inner half-ring chuck (2) close to the pressure plate (3), and the outer boss (9) is located between the outer annular surface of the hinge pin shaft (1) and the inner annular surface of the recess (7).

3. The locking structure of the hydraulic support connector and the scraper ear plate according to claim 1 is characterized in that: It also comprises a hydraulic support connecting head (10) and a scraper ear plate (11), wherein the hydraulic support connecting head (10) and the scraper ear plate (11) are provided with coaxial connecting holes, and the hinge pin shaft (1) simultaneously passes through the connecting holes of the hydraulic support connecting head (10) and the scraper ear plate (11).

4. The locking structure of the hydraulic support connector and the scraper ear plate according to claim 3 is characterized in that: Washers (12) are provided between the limit block (5) and the scraper lug (11), and between the inner semi-ring chuck (2) and the scraper lug (11).

Images