Crankshaft proofing and punching device

Abstract

The utility model relates to the technical field of marine crankshafts, and provides a crankshaft proofing and punching device which is arranged between two balance iron outer circle shaft necks of a crankshaft and comprises a positioning V-shaped body, the positioning V-shaped body comprises two V-shaped supporting bodies and a punching base body connected with the two V-shaped supporting bodies, a lower punching blind hole is downwards formed in the top of the punching base body, and the lower punching blind hole is communicated with the positioning V-shaped body. Puncher pin holes communicated with the lower punching blind hole are formed in the two opposite side walls of the lower portion of the punching base body, puncher pins are arranged in the puncher pin holes, the ends, close to the lower punching blind hole, of the puncher pins are detachably connected with puncher pin bases, and the ends, close to the lower punching blind hole, of the puncher pin bases are inclined planes and protrude into the lower punching blind hole; a punch is movably connected into the lower punching blind hole, and the lower portion of the punch is provided with an inclined pushing face structure in sliding fit with the inclined face of the punch base. According to the scheme, the structure is reasonable, manufacturing is easy, positioning, sample punching and punching can be rapidly conducted, a connecting rod journal is prevented from being strained, and punching on the two sides of a connecting rod inner gear can be completed simultaneously.

Description

Technical Field

[0001] The utility model relates to the technical field of marine crankshafts, in particular to a crankshaft proofing and punching device. Background Art

[0002] The marine crankshaft is one of the important parts of the ship's internal combustion engine, which is used to convert the reciprocating motion of the piston into rotational motion to drive the ship forward. The marine crankshaft is a complex part, consisting of a main journal, a connecting rod journal, and a crank arm. Some large marine crankshafts require engraving and punching on both sides of the crankshaft connecting rod outer block. The existing proofing and punching method generally uses a punching device with a punch at one end, which is positioned through the connecting rod journal. When punching, force is applied to the punching device, and after punching one side, it is tooled to the other side. This method is inconvenient to operate, has a slow engraving speed, and is easy to damage the connecting rod journal. Therefore, a crankshaft proofing and punching device is proposed to solve the above problems. Utility Model Content

[0003] In order to solve the problems existing in the background technology, the utility model proposes a crankshaft proofing and punching device. The device has a reasonable structure and is easy to manufacture. It can quickly locate and punch holes to avoid straining the connecting rod journal and can complete the punching of both sides of the connecting rod inner gear at the same time.

[0004] In order to achieve the above purpose, the utility model adopts the following scheme:

[0005] A crankshaft proofing and punching device is arranged between the two balance iron outer cylindrical journals of the crankshaft, including a positioning V-shaped body, the positioning V-shaped body includes two V-shaped support bodies and a punching base connecting the two V-shaped support bodies, a lower punch blind hole is opened downwardly at the top of the punching base, and a punch hole connected to the lower punch blind hole is opened on the two opposite side walls of the lower part of the punching base, a punch is arranged in the punch hole, and an end of the punch close to the lower punch blind hole is detachably connected to a punch seat, and an end of the punch seat close to the lower punch blind hole is inclined and protrudes into the lower punch blind hole; a punch is movably connected in the lower punch blind hole, and the lower part of the punch has an inclined push surface structure that slides with the inclined surface of the punch seat.

[0006] Furthermore, the V-shaped support body includes two folded plates circumscribed to the outer cylindrical shaft neck of the balance iron, and the two folded plates are connected to the side surfaces of the punch hole base body with a V-shaped connector.

[0007] Furthermore, the punch includes a punch handle and a punch head with a shaft diameter smaller than the punch handle, the punch head is connected to the punch handle through the inclined push surface structure, the punch handle extends out of the lower punch blind hole, and an elastic member is sleeved on the punch head.

[0008] Furthermore, a limiting groove is provided on the upper part of the punch handle, and a limiting member is movably connected in the limiting groove, and one end of the limiting member away from the limiting groove is fixed on the hole wall of the lower punch blind hole.

[0009] Furthermore, the punch hole protrudes from the punch base, a punch cover is fixed to the outer end face of the punch, the punch cover is provided with a center hole matching the punch, a first compression spring is restricted between the punch cover and the punch seat, and the first compression spring is sleeved on the punch.

[0010] Furthermore, the size of the center hole is larger than the size of the punch and smaller than the size of the punch seat.

[0011] The beneficial effects of the utility model are as follows: the utility model can fix the device between the two balancing iron outer cylindrical shaft necks through a V-shaped support body to determine the punching position, thereby avoiding pulling the connecting rod shaft neck; the punch and the punch seat are detachably connected to form a whole, and are slidably connected through the inclined surface of the punch seat and the inclined push surface structure of the punch, so that when the punch moves downward, the punch seat and the punch can be driven to move to both sides, thereby completing the punching on both sides of the inner gear of the connecting rod at the same time; the device has a simple and reasonable structure and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a front cross-sectional structural schematic diagram of the device of this embodiment;

[0013] Figure 2 It is a front view of the device of this embodiment in use state;

[0014] Figure 3 It is a side view of the device of this embodiment;

[0015] Figure 4 This is a schematic diagram of the punch structure of this embodiment;

[0016] Figure 5 This is a schematic diagram of the enlarged structure of point A in this embodiment.

[0017] Numbers in the figure: 1, V-shaped support body; 101, folding plate; 102, V-shaped connector; 2, punching base; 201, lower punch blind hole; 202, punch hole; 3, punch; 301, inclined push surface structure; 302, punch handle; 303, punch head; 304, limiting groove; 4, elastic member; 5, limiting member; 6, punch cover; 601, center hole; 7, punch; 8, punch seat; 9, first compression spring; 10, outer cylindrical shaft neck of balancing iron. DETAILED DESCRIPTION

[0018] In order to make the present invention clearer and more understandable, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the given embodiment is only one implementation method and does not represent all embodiments.

[0019] Combination Figure 1-Figure 5 , this embodiment provides a crankshaft proofing and punching device, "proofing and punching" is a mechanical processing process, which is mainly used to mark the hole positions on metal or other materials in advance for subsequent precise drilling, punching and other processing operations. Specifically, "proofing" refers to marking the positions to be processed on the material, while "punching" refers to using a stamping device to punch holes at the marked positions.

[0020] The proofing punching device is arranged between the two balancing iron outer cylindrical journals 10 of the crankshaft, and includes a positioning V-shaped body, and the positioning V-shaped body includes two V-shaped support bodies 1 and a punching base 2 connecting the two V-shaped support bodies 1. The device can be quickly fixed between the two balancing iron outer cylindrical journals 10 through the V-shaped support body 1. The V-shaped support body 1 includes two folding plates 101 that are circumscribed to the balancing iron outer cylindrical journal 10, and the two folding plates 101 are connected to the sides of the punch hole 202 base with a V-shaped connector 102. The two folding plates 101 are arranged tangent to the top of the arc-shaped journal to improve the fit between the device and the journal. The connection position of the two folding plates 101 and the V-shaped connector 102 can be quickly clamped on the balancing iron outer cylindrical journal 10.

[0021] A lower punch blind hole 201 is provided downwardly at the top of the punching base 2, and punch holes 202 connected to the lower punch blind hole 201 are provided on the two opposite side walls of the lower part of the punching base 2. A punch 7 is provided in the punch hole 202, and a punch seat 8 is detachably connected to the end of the punch 7 close to the lower punch blind hole 201. The end of the punch seat 8 close to the lower punch blind hole 201 is inclined and protrudes into the lower punch blind hole 201; the lower punch blind hole 201 is provided with a punch hole 202; A punch 3 is movably connected, and the lower part of the punch 3 has an inclined push surface structure 301 that slides with the inclined surface of the punch seat 8. In a natural state, the inclined push surface structure 301 is horizontally arranged relative to the punch seat 8 through the elastic member 4, and the inclined surface of the punch seat 8 is slidably connected to the inclined push surface structure 301 of the punch 3, so that when the punch 3 moves downward, it can drive the punch seat 8 and the punch 7 to move to both sides, thereby completing the punch holes 202 on both sides of the inner gear of the connecting rod at the same time.

[0022] Specifically, the punch hole 202 in this embodiment is protruded from the punching base 2, which is more suitable for the length of the punch 7 and the punch seat 8, and shortens the distance between the punch 7 and the surface to be punched. The inside of the punch seat 8 is provided with an internal thread, and one end of the punch 7 is provided with an external thread. The punch seat 8 and the punch 7 are detachably connected through the connection of the internal and external threads, which is convenient for quick replacement of the punch 7. It should be understood that the size of the punch seat 8 protruding into the lower punch blind hole 201 needs to meet the size of the punch 7 for proofing.

[0023] It should be noted that the position and size of the holes punched on each crankshaft are different. The punching device of this embodiment is limited to one of the crankshafts. The position of the crankshaft punching is certain. The position of the punch base where the punch 7 is located can be set in advance according to its size. When the two V-shaped support bodies 1 are clamped on the outer cylindrical shaft neck 10 of the balancing iron, the position of the punch 7 corresponding to the shaft neck is the shaft neck punching position, and the horizontal distance between the punches 7 on both sides of the device is the distance between the two outer cylindrical shaft necks 10 of the balancing iron.

[0024] The upper part of the punch handle 302 is provided with a limiting groove 304, and a limiting member 5 is connected to the limiting groove 304 so as to be movable up and down. One end of the limiting member 5 away from the limiting groove 304 is fixed on the hole wall of the lower punch blind hole 201. In a natural state, the limiting member 5 is located at the lower part of the limiting groove 304. The limiting member 5 of this embodiment is a screw, which is screwed into the lower punch blind hole 201 of the punching base 2 to limit the up and down movement of the punch 3 within the length of the limiting groove 304, so as to prevent the punch 3 from moving too deep downward and being inconvenient to reset, or from falling out of the lower punch blind hole 201 when resetting. It should be understood that the size of the limiting groove 304 above the limiting member 5, that is, the size of the punch 3 that can move downward, needs to be sufficient to push out the punch 7 to punch.

[0025] Specifically, the punch 3 includes a punch handle 302 and a punch head 303 whose axial diameter is smaller than the punch handle 302. The punch head 303 is connected to the punch handle 302 through the oblique push surface structure 301. The punch handle 302 extends out of the lower punch blind hole 201. The elastic member 4 is sleeved on the punch head 303. The elastic member 4 can be a compression spring. The setting of the large and small axial diameters of the punch handle 302 and the punch head 303 realizes the compression of the compression spring. The compression spring can make the oblique push surface structure 301 and the punch seat 8 on the same horizontal line in a natural state, and can also realize the reset of the punch 3 after the device completes the proofing and punching. Preferably, the top of the punch handle 302 of this embodiment is connected with the punch handle 302 head, so as to apply force to the punch 3.

[0026] Specifically, a punch cover 6 is fixed to the outer end surface of the punch hole 202, and the punch cover 6 is provided with a center hole 601 matching the punch 7. A first compression spring 9 is limited between the punch cover 6 and the punch seat 8, and the first compression spring 9 is sleeved on the punch 7. The size of the center hole 601 is larger than the size of the punch 7 and smaller than the size of the punch seat 8, so that only the punch 7 can move out of the punch hole 202. The first compression spring 9 can realize the reset of the punch 7 after completing the proofing and punching.

[0027] The working process of the device is as follows:

[0028] The device is placed between two balancing iron outer cylindrical shaft necks 10, and the two balancing iron outer cylindrical shaft necks 10 are clamped together to achieve positioning by two V-shaped support bodies 1, and then a force is applied downward to the punch 3 to push the punch 3 to move downward. The downward movement of the punch 3 pushes the punch seats 8 at both ends of the punching base 2 to move outward, driving the punch 7 to move outward to achieve punching. After the punching is completed, the compression spring sleeved on the punch 3 resets the punch 3, and the limiting groove 304 is restricted by the screw, and the reset of the punch 3 is restricted in the lower punch blind hole 201, and the punch 7 and the punch seat 8 are reset by the first compression spring 9 sleeved on the punch 7.

[0029] The above is a detailed description of the specific implementation of the utility model in conjunction with the drawings, but the utility model is not limited to the described implementation. For those skilled in the art, without departing from the principle and spirit of the utility model, various changes, modifications, substitutions and variations are made to these implementations, which still fall within the scope of protection of the utility model.

Claims

1. A crankshaft proofing and punching device, arranged between two balance iron outer cylindrical journals (10) of the crankshaft, characterized in that: The invention comprises a positioning V-shaped body, wherein the positioning V-shaped body comprises two V-shaped support bodies (1) and a punching base (2) connecting the two V-shaped support bodies (1); a lower punch blind hole (201) is provided downwardly on the top of the punching base (2); two opposite side walls of the lower part of the punching base (2) are provided with a punch hole (202) connected to the lower punch blind hole (201); a punch (7) is provided in the punch hole (202); an end of the punch (7) close to the lower punch blind hole (201) is detachably connected to a punch seat (8); an end of the punch seat (8) close to the lower punch blind hole (201) is inclined and protrudes into the lower punch blind hole (201); a punch (3) is movably connected in the lower punch blind hole (201); the lower part of the punch (3) has an inclined push surface structure (301) that is slidably matched with the inclined surface of the punch seat (8).

2. A crankshaft proofing and punching device according to claim 1, characterized in that: The V-shaped support body (1) comprises two folded plates (101) circumscribed to the outer cylindrical journal (10) of the balancing iron, and the two folded plates (101) are connected to a V-shaped connector (102) on the side of the base body close to the punch hole (202).

3. A crankshaft proofing and punching device according to claim 1, characterized in that: The punch (3) comprises a punch handle (302) and a punch head (303) having a smaller axial diameter than the punch handle (302); the punch head (303) is connected to the punch handle (302) via the inclined push surface structure (301); the punch handle (302) extends out of the lower punch blind hole (201); and an elastic member (4) is sleeved on the punch head (303).

4. A crankshaft proofing and punching device according to claim 3, characterized in that: A limiting groove (304) is provided on the upper part of the punch handle (302), and a limiting member (5) is movably connected in the limiting groove (304) up and down. One end of the limiting member (5) away from the limiting groove (304) is fixedly arranged on the hole wall of the lower punch blind hole (201).

5. A crankshaft proofing and punching device according to claim 1, characterized in that: The punch hole (202) is protruding from the punch base (2), and a punch cover (6) is fixed to the outer end face of the punch, and the punch cover (6) is provided with a center hole (601) matching the punch (7), and a first compression spring (9) is restricted between the punch cover (6) and the punch seat (8), and the first compression spring (9) is sleeved on the punch (7).

6. A crankshaft proofing and punching device according to claim 5, characterized in that: The size of the center hole (601) is larger than the size of the punch (7) and smaller than the size of the punch seat (8).

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