CN221135589U

CN221135589U - Special fixture for engine gland

Info

Publication number: CN221135589U
Application number: CN202322716538.XU
Authority: CN
Inventors: 尹桂红; 沈运海; 黎明; 沈祁阳; 汤桥平
Original assignee: Hunan Goz Precision Machinery Co ltd
Current assignee: Hunan Goz Precision Machinery Co ltd
Priority date: 2023-10-10
Filing date: 2023-10-10
Publication date: 2024-06-14
Anticipated expiration: 2033-10-10

Abstract

A special fixture for an engine gland relates to the technical field of fixtures. The special fixture for the engine gland comprises the ears on the left side and the right side, the front sides of the two ears are connected through the arched connecting parts, the bottoms of the two ears are flush, the rear sides of the two ears are straight, the two ears are provided with the positioning holes and the upright posts, and the tops of the upright posts are connected through the top cover; the clamp comprises a base, wherein the left side and the right side of the base are provided with pressing parts, the rear side of the base is provided with a stop block, two positioning pins which can be matched with positioning holes on the ears are arranged between the two pressing parts, and the positioning pins are positioned right in front of the stop block; the stop block is propped against the rear side of the engine gland, the positioning pin is inserted into the positioning holes of the two lugs, and the pressing part presses the two lugs to fix the engine gland. The utility model can quickly and well fix the engine gland so as to ensure the machining precision and improve the efficiency.

Description

Special fixture for engine gland

Technical Field

The utility model relates to the technical field of clamps, in particular to a special clamp for an engine gland.

Background

The requirements of all parts of an engine on machining precision are high, whether the parts are fixed firmly is an important factor affecting the machining precision, the engine gland is limited in structure (the bottom of the engine gland is provided with two lugs, the two lugs are not of a conventional cylindrical structure and a conventional prismatic structure, the top of the engine gland is required to be drilled), the engine gland is inconvenient to fix by using a conventional device (at present, a lathe and a milling machine usually position a workpiece by using a four-jaw chuck), so that the engine gland has a plurality of inconveniences in the existing machining process, the machining efficiency is affected, the existing conventional clamp cannot fix the engine gland well, and the machining precision is easily affected. Therefore, if a clamp suitable for an engine gland can be designed, the machining precision and efficiency can be improved.

Disclosure of utility model

The utility model aims to provide a clamp suitable for an engine gland, which can be used for quickly and well fixing the engine gland, so that the engine gland is firmly positioned in the processing process, and the processing precision of the engine gland is ensured.

In order to achieve the above purpose, the present utility model adopts the following technical scheme: the special fixture of engine gland, the engine gland includes the ear of left and right sides, the front side of two ears links to each other and their bottom is parallel and level through the arch connecting portion, the rear side of two ears is straight form, all is equipped with locating hole and stand on two ears, link to each other through the top cap between the top of stand;

The clamp comprises a base, wherein the left side and the right side of the base are provided with pressing parts, the rear side of the base is provided with a stop block, two positioning pins which can be matched with positioning holes on the ears are arranged between the two pressing parts, and the positioning pins are positioned right in front of the stop block;

The stop block is propped against the rear side of the engine gland, the positioning pin is inserted into the positioning holes of the two lugs, and the pressing part presses the two lugs to fix the engine gland.

Preferably, the height of the locating pin is lower than the height of the locating hole (i.e., the thickness of the ear).

Preferably, the length of the stop is greater than the minimum spacing between the two locating pins.

Preferably, a fixing seat is arranged on the base, a sliding groove is arranged on the fixing seat, the pressing part is arranged in the sliding groove and can slide along the sliding groove, a strip-shaped through hole is arranged on the pressing part, and a locking bolt in threaded connection with the base is arranged in the strip-shaped through hole.

Preferably, a protruding portion is provided at the lower side of the end portion of the holding portion, and the protruding portion is used for pressing the upper end face of the ear portion.

Preferably, the bottom of the base is connected with a fixed disk which can be matched with a lathe or a milling machine.

According to the structural characteristics of the engine gland, the fixture matched with the engine gland is designed, and the engine gland can be positioned quickly and well in the machining process, so that the machining precision and the lifting efficiency are ensured.

Drawings

FIG. 1 is a schematic diagram of a process flow of an engine gland blank to finished product structure in an embodiment;

FIG. 2 is a schematic diagram of an engine gland blank in an embodiment;

FIG. 3 is a schematic diagram of the structure of a finished engine gland in an embodiment;

FIG. 4 is a schematic illustration of an engine gland mounted on a clamp in an embodiment;

FIG. 5 is an exploded schematic view of an engine gland and clamp in an embodiment;

FIG. 6 is a schematic structural view of a special fixture for an engine gland in an embodiment;

fig. 7 is a front view of a special fixture for an engine gland in an embodiment.

In the figure:

1-Engine gland 1 a-ear

1A 1-positioning hole 1 b-arch connecting part

1 C-column 1 d-top cover

1D 1-through hole 1 e-connecting part

1 F-connecting plate 2-base

3-Pressing part 3 a-strip-shaped through hole

3 B-boss 4-stop

5-Locating pin 6-fixing seat

6 A-chute 7-locking bolt

8-Fixed disk.

Detailed Description

The present utility model will be further described with reference to the following examples, which are not intended to be limiting, for the understanding of those skilled in the art.

The existing clamps on lathes and milling machines are generally similar to four-jaw chucks, are mainly used for fixing cylindrical workpieces such as cylinders and prismatic workpieces such as cuboids, are not applicable to workpieces with unconventional structures, such as an engine gland 1 with two lugs 1a at the bottom and holes at the top, are very inconvenient when the clamps are used for positioning the clamps by utilizing the four-jaw chucks due to the fact that the clamps are not of the conventional cylindrical structures and the prismatic structures, and are easy to loosen in the machining process of lathes (lathes and milling machines) even if the clamps are fixed, so that machining precision is affected. In this regard, the present embodiment designs a special fixture applicable to the engine gland 1, which can be used for machining of lathes and milling machines, and can quickly and well fix the engine gland. On the other hand, the machined engine gland 1 may also generally need to perform precision detection (such as size detection using a three-coordinate measuring machine), and whether the engine gland 1 is fixed firmly during the detection is also an important factor affecting the detection result. The clamp of the embodiment can be also applied to workpiece detection to ensure detection precision. Therefore, the fixture in this embodiment not only can be used as a fixture for machining of lathes and milling machines, to perform quick and good fixation of the engine gland 1, but also can be used as a fixture for detection, and used in the workpiece detection process, so as to ensure the detection accuracy thereof.

Fig. 1 is a schematic flow chart showing the structure of a blank of an engine gland to be processed to the structure of a finished product of the engine gland after processing in the present embodiment. It should be noted that, although the engine gland 1 is machined in a plurality of places in the finished structure shown in the drawings, the jig designed in this embodiment is mainly directed to the drilling process of the top cover 1d thereof. As can be seen from fig. 1 and 2, the left and right sides of the engine gland 1 with the blank structure (blank) are provided with lugs 1a, the front side is provided with a connecting part 1e, the rear side is straight, the inner side ends of the two lugs 1a are respectively provided with an upright post 1c, a connecting plate 1f extending from bottom to top is connected between the upright posts 1c, and a top cover 1d is arranged between the tops of the upright posts 1 c. Wherein, the connection part 1e can form an arch connection part 1b after processing, the connection plate 1f between the upright posts 1c can be removed after processing, the lug part 1a can form a positioning hole 1a1 penetrating vertically on the lug part 1a after processing, and the top cover 1d can form a through hole 1d1 penetrating vertically in the middle position thereof after processing. As can be seen from fig. 1 and 3, the engine gland 1 with the finished product structure after processing includes two ears 1a on the left and right sides, the front side is an arch connecting portion 1b and connects the two ears 1a through the arch connecting portion 1b, the arch connecting portion 1b is flush with the bottoms of the ears 1a, the rear sides of the two ears 1a (i.e. the rear side of the engine gland 1) are flat, the two ears 1a are provided with a stand column 1c (located at the inner side end of the ears 1 a) and a positioning hole 1a1 (located between the outer side end of the ears 1a and the stand column 1 c), the tops of the stand columns 1c are connected through a top cover 1d, and the top cover 1d is provided with a through hole 1d1 (the through hole 1d1 is a hole to be drilled after positioning by using a fixture).

Fig. 4 to 7 show the overall structure of the jig in this embodiment, which mainly includes: base 2, pressure portion 3, dog 4, locating pin 5, fixed disk 8 etc.. The base 2 is mainly used for installing each positioning component and placing workpieces, and the surface of the base 2 is flat so as to ensure that the placed workpieces are more stable. The number of the holding parts 3 (also referred to as pressing plates or pressing blocks) in the present embodiment is two, and the holding parts are respectively disposed at the left and right sides of the base 2 for holding the ears 1a at the two sides of the engine gland 1. A stop 4 is provided on the rear side of the base 2 for abutting against the rear side of the engine gland 1. When the engine gland 1 is used, the stop block 4 is pressed against the rear side of the engine gland 1 and the pressing part 3 to press the two lugs 1a, so that the engine gland 1 can be fixed. The whole clamp is simple in structure and convenient to operate.

In addition, after the two lugs 1a of the engine gland 1 are fixed and propped against the rear sides of the engine gland 1, the engine gland can be positioned and fixed, so that the stability of the engine gland in the machining process is ensured, at the moment, the top cover 1d is equivalent to being suspended on the whole base 2 (or the clamp), interference generated in the machining process can be reduced, and the engine gland can be conveniently drilled by a machine tool.

For better and faster positioning of the engine gland 1 work piece, two positioning pins 5 corresponding to the positioning holes 1a1 on the ears 1a may be provided on the base 2, the positioning pins 5 being located directly in front of the stop 4. The height of the positioning pin 5 should be lower than the height of the positioning hole 1a1 to avoid interference with the holding portion 3 when holding the ear portion 1 a. The length of the stop block 4 can be larger than the minimum distance between the two positioning pins 5, and the rear side of the engine gland 1 can be better abutted against the stop block 4 by prolonging the length of the stop block 4, so that the contact area is larger. In addition, the height of the locating pin 5 can be lower than that of the stop block 4, so that when the engine gland 1 is used, the rear side of the engine gland 1 can be firstly propped against the front side wall of the stop block 4, then the position of the engine gland 1 is adjusted left and right, the locating hole 1a1 and the locating pin 5 are aligned, the engine gland 1 can be quickly located by moving downwards, and then the lug part 1a is pressed by the pressing part 3, so that the engine gland 1 can be fixed. The whole operation is simpler and the positioning is quicker. Of course, even if the height of the positioning pin 5 is higher than the height of the positioning hole 1a1, that is, the positioning pin 5 is exposed, the tip of the positioning pin 5 may be placed in the avoiding hole by providing the corresponding avoiding hole in the holding portion 3, so that the holding portion 3 can hold the ear portion 1a well. The two positioning pins 5 may have the same shape or may be different from each other as long as the positioning of the positioning hole 1a1 is achieved.

In addition, because the rear side of the engine gland 1 is straight, the bottom supporting area is less, and the condition of tilting to the rear side easily occurs when drilling is carried out from top to bottom, the embodiment can play a role in quick positioning and play a certain supporting role to the rear side of the base 2 by arranging the stop block 4 at the rear side of the base 2, so that the rear tilting of the engine gland is avoided. In practice, the height of the stop 4 may be greater than the height of the ear 1 a. When the engine gland 1 is arranged on the clamp, the engine gland 1 can be firmly fixed under the combined action of the stop block 4, the positioning pin 5 and the pressing part 3, so that the positioning reliability of the engine gland 1 is ensured, and the engine gland 1 is prevented from deviating.

In order to enhance the mobility of the holding portion 3, the following settings may be made: the base 2 is provided with a fixed seat 6, the fixed seat 6 is provided with a sliding groove 6a, the pressing part 3 is arranged in the sliding groove 6a and can slide along the sliding groove 6a, the pressing part 3 is provided with a strip-shaped through hole 3a, the strip-shaped through hole 3a is internally provided with a locking bolt 7 which is connected to the base 2 in a threaded manner, and the locking bolt 7 penetrates through the strip-shaped through hole 3a and can downwards press the pressing part 3. When the locking bolt 7 is used, the tightness degree of the pressing part 3 can be adjusted, and after the locking bolt is completely loosened, the upper and lower heights of the pressing part 3 can be adjusted. The sliding groove 6a can play a certain guiding role on the pressing part 3, so that the pressing part can move along the left-right direction, and the pressing part can be more conveniently close to and far away from the lug part 1a. In addition, the height of the bottom wall of the chute 6a on the fixing seat 6 can be equal to the height of the ear 1a, so that the fixing seat 6 can play a supporting role, the pressing forces at two ends of the pressing part 3 are relatively balanced, and the pressing part 3 can better press the ear 1a.

The area of the pressing part 3 for contacting the upper end face of the ear part 1a can be a flat area, so that the contact area is larger, or a bulge part 3b with an area smaller than the area of the ear part 1a and larger than the area of the positioning hole 1a1 is arranged in the area, so that the end part of the pressing part 3 can press the ear part 1a more flexibly and better. In addition, the width of the whole holding portion 3 can be made narrower, avoiding interference with the stopper 4.

Further, since the engine gland 1 according to the present embodiment is generally mass-produced, the positions of the components in the jig can be set correspondingly according to the required structural dimensions of the engine gland 1, so as to better position and fix the engine gland 1 workpiece.

In addition, in order to improve the installation efficiency of the workpiece of the engine gland 1 in the machining process of a machine tool (a lathe or a milling machine), a fixed disc 8 can be arranged at the bottom of the base 2, and the fixed disc 8 can be matched with the lathe or the milling machine and can be directly connected and installed on the machine tool in a butt joint mode. The fixed disk 8 and the base 2 may be fixedly connected or detachably connected.

The foregoing is merely a preferred embodiment of the present utility model, and is not intended to limit the present utility model in any way, but is not intended to depart from the scope of the present utility model.

Claims

1. The special fixture of engine gland, engine gland (1) include ear (1 a) of left and right sides, and the front side of two ears (1 a) links to each other and their bottom parallel and level through arch connecting portion (1 b), and the rear side of two ears (1 a) is straight form, all is equipped with locating hole (1 a 1) and stand (1 c) on two ears (1 a), link to each other through top cap (1 d) between the top of stand (1 c), its characterized in that:

the device comprises a base (2), wherein the left side and the right side of the base (2) are provided with a pressing part (3), the rear side of the base is provided with a stop block (4), two positioning pins (5) which can be matched with positioning holes (1 a 1) on an ear part (1 a) are arranged between the two pressing parts (3), and the positioning pins (5) are positioned right in front of the stop block (4);

The stop block (4) is propped against the rear side of the engine gland (1), the positioning pin (5) is inserted into the positioning holes (1 a 1) of the two lugs (1 a), and the pressing part (3) presses the two lugs (1 a) to fix the engine gland (1).

2. The special fixture for engine gland according to claim 1, wherein: the height of the locating pin (5) is lower than the height of the locating hole (1 a 1).

3. The special fixture for engine gland according to claim 1, wherein: the length of the stop block (4) is larger than the minimum distance between the two positioning pins (5).

4. The special fixture for engine gland according to claim 1, wherein: the base (2) is provided with a fixing seat (6), the fixing seat (6) is provided with a sliding groove (6 a), the pressing part (3) is arranged in the sliding groove (6 a) and can slide along the sliding groove (6 a), the pressing part (3) is provided with a strip-shaped through hole (3 a), and the strip-shaped through hole (3 a) is provided with a locking bolt (7) which is in threaded connection with the base (2).

5. The special fixture for engine gland according to claim 4, wherein: the lower side of the end part of the holding part (3) is provided with a protruding part (3 b), and the protruding part (3 b) is used for pressing the upper end surface of the lug part (1 a).

6. The special fixture for engine gland according to claim 1, wherein: the bottom of the base (2) is connected with a fixed disc (8) which can be matched with a lathe or a milling machine.