Piston inner pin hole machining device

Abstract

The utility model relates to a piston inner pin hole machining device which is used for limiting a piston and comprises a bottom plate, a rotating plate is connected to the bottom plate, four sets of limiting columns are arranged above the rotating plate, and in the installation state, the four sets of limiting columns are clamped into four included angles of the piston respectively to form a rectangular limiting face. According to included angles existing in the bottom plate, the limiting columns are clamped into the corresponding included angles so as to limit the position of the piston, and meanwhile the four limiting columns form a rectangular limiting face so as to limit relative rotation of the piston in the machining process.

Description

Technical Field

[0001] The utility model belongs to the technical field of piston pin holes, and particularly relates to a processing device for piston inner pin holes. Background Technique

[0002] In the structure of an internal combustion engine, the role of the piston is crucial. Therefore, the processing technology requirements of the piston are very high. For example, the coaxiality requirement between the two inner pin holes of the piston. The piston inner pin hole is a pin hole for installing the crank connecting rod. The pin shaft passes through the inner pin hole and the installation hole on the crank rod, so that the crank is connected to the piston. During the processing of the pin hole, a jig is required to fix the piston to prevent the piston from shaking during the processing process.

[0003] For example, in the Chinese utility model patent with the patent number ZL202221645489.4 and the name of "a piston jig for processing piston inner pin holes", in the

[0026] paragraph of its specification, Figure 2 it specifically discloses that the piston is clamped from the outside by a first clamping block and a second clamping block; however, due to the overall cylindrical design of the piston, this clamping method is not firm enough to fix the piston, and the piston will rotate during the processing, affecting the coaxiality of the two inner pin holes. Content of the Utility Model

[0004] Aiming at the problem that the fixing method during piston processing in the prior art is not firm enough, and the piston will rotate during the processing, affecting the coaxiality of the two inner pin holes, the utility model provides a processing device for piston inner pin holes, and the specific technical solutions are as follows:

[0005] The present application provides a processing device for piston inner pin holes, which is used to limit the piston, including a bottom plate, a rotating plate is connected to the bottom plate, and four groups of limiting columns are arranged above the rotating plate. In the installation state, the four groups of limiting columns are respectively clamped into the four included angles of the piston and form a rectangular limiting surface.

[0006] As a further technical solution of the utility model, a bidirectional lead screw one is rotatably arranged on the rotating plate, and two groups of fixing frames are symmetrically screwed on the bidirectional lead screw one, and each group of fixing frames corresponds to two limiting columns.

[0007] As a further technical solution of the utility model, the fixing frame is slidably arranged on the rotating plate.

[0008] As a further technical solution of the utility model, a bidirectional lead screw two is rotatably connected to the fixing frame, and two groups of sliding parts are symmetrically screwed on the bidirectional lead screw two, and limiting columns are arranged on each group of sliding parts.

[0009] As a further technical solution of the utility model, the bidirectional lead screw two is perpendicular to the bidirectional lead screw one in the horizontal projection plane.

[0010] As a further technical solution of the present utility model, the bottom plate is rotatably connected to the rotating plate, and an output motor is installed at the bottom of the bottom plate. The output shaft of the output motor penetrates through the bottom plate and is connected to the rotating plate.

[0011] The beneficial effects of the present utility model are as follows:

[0012] (1) In this application, for the included angle existing inside the bottom plate itself, the limiting posts are inserted into the corresponding included angles to limit the position of the piston. At the same time, the four limiting posts form a rectangular limiting surface to limit the relative rotation of the piston during the processing.

[0013] (2) In this application, a first bidirectional lead screw and a second bidirectional lead screw that are vertically cross-arranged on the horizontal projection plane are provided, which can drive the limiting posts to move in any horizontal and vertical directions on a plane to correspond to the included angles at any positions. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Shows the overall structural schematic diagram of the piston internal pin hole processing device;

[0015] Figure 2 Shows the structural schematic diagram of the fixing frame;

[0016] Figure 3 Shows the structural schematic diagram after the limiting posts are inserted into the piston.

[0017] LEGEND DESCRIPTION:

[0018] 100, bottom plate; 110, rotating plate; 120, support side plate; 130, first bidirectional lead screw; 140, first driving motor; 150, fixing frame; 151, slideway; 152, second bidirectional lead screw; 153, sliding member; 154, second driving motor; 160, limiting post; 200, piston; 210, inner cavity; 220, pin hole wall. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below in conjunction with the embodiments.

[0020] Aiming at the problem that the fixing method in the prior art is not firm enough, and the piston will rotate during the processing, affecting the coaxiality of the two internal pin holes; in this application, for the included angle inside the bottom plate 100, the limiting posts 160 are inserted into the corresponding included angles to limit the position of the piston 200. At the same time, the four limiting posts 160 form a rectangular limiting surface to limit the relative rotation of the piston 200 during the processing.

[0021] Figure 3 Shows the structural schematic diagram after the limiting posts 160 are inserted into the piston 200; Figure 3In it, the piston 200 has an inner cavity 210 inside. There are two pin hole walls 220 extending into the inner cavity 210 on the piston 200. Four included angles are formed between the two pin hole walls 220 and the end wall of the inner cavity 210. In the installation state, four limit posts 160 are inserted into the inner cavity 210 and respectively engaged into the four included angles. By using the included angles formed between the pin hole walls 220 and the inner cavity 210 in the piston 200, the corresponding number of limit posts 160 are inserted to limit the piston 200, so as to prevent the piston 200 from rotating during the processing.

[0022] Figure 1 The overall structural schematic diagram of the inner pin hole processing device of the piston is shown; Figure 1 In it, the inner pin hole processing device of the piston includes a bottom plate 100. A rotating plate 110 is connected to the bottom plate 100. Four groups of limit posts 160 are arranged above the rotating plate 110. In the installation state, the four groups of limit posts 160 are respectively engaged into the four included angles of the piston. The limit posts 160 are used to limit the corresponding included angles to form a rectangular limit surface, so as to limit the rotational movement of the piston 200 during the processing, and make the bottom plate 100 and the piston 200 form an integral body. The bottom plate 100 is rotatably connected to the rotating plate 110. An output motor (not shown in the figure) is installed at the bottom of the bottom plate 100. The output shaft of the output motor penetrates through the bottom plate 100 and is connected to the rotating plate 110. When the inner pin hole on one side of the piston 200 is processed, the output motor can drive the rotating plate 110 and the piston 200 to rotate 180 degrees to process the other side, ensuring the coaxiality of the two inner pin holes. Two support side plates 120 are arranged at intervals on the rotating plate 110. A two-way lead screw 130 is rotatably connected between the two support side plates 120. A driving motor 140 is installed on one group of support side plates 120, and the output end of the driving motor 140 is connected to the support side plate 120. Two groups of fixing frames 150 are symmetrically screwed on the two-way lead screw 130. The fixing frames 150 are slidably arranged above the rotating plate 110. Each group of fixing frames 150 corresponds to two limit posts 160. When the driving motor 140 is started, the two-way lead screw 130 can be driven to rotate, so as to drive the two fixing frames 150 to move in the opposite direction along the track of the two-way lead screw 130, so as to adjust the distance between the two fixing frames 150. On the one hand, the distance between the two fixing frames 150 can be reduced before inserting the piston 200, which is beneficial to the insertion of the limit posts 160 into the piston 200. On the other hand, the adjustable distance between the two fixing frames 150 is applicable to pistons 200 of different sizes, improving the applicability of the device.

[0023] Figure 2 The structural schematic diagram of the fixing frame 150 is shown; Figure 2In it, a slideway 151 is formed on a fixing frame 150, and a two-way lead screw two 152 is rotatably connected in the slideway 151. Two groups of sliding members 153 are symmetrically screwed on the two-way lead screw two 152. A limiting post 160 is arranged on each group of sliding members 153. A driving motor two 154 is installed on the fixing frame 150. The output end of the driving motor two 154 is connected to the two-way lead screw two 152. Starting the driving motor two 154 can drive the two-way lead screw two 152 to rotate, thereby driving the two sliding members 153 to move in the opposite direction along the track of the two-way lead screw two 152, so as to adjust the distance between the two sliding members 153, and thus adjust the distance between the two limiting posts 160 on the two sliding members 153. On the one hand, the distance between the two limiting posts 160 on each fixing frame 150 can be adjusted before inserting the piston 200, so as to be applicable to pin hole walls 220 of different sizes; the two-way lead screw two 152 is perpendicular to the two-way lead screw one 130 in the horizontal projection plane, so that the limiting post 160 can move in any horizontal and vertical directions on a plane to correspond to any included angle at any position.

[0024] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them.

Claims

1. A piston inner pin hole processing device, used for limiting a piston (200), comprising a base plate (100), characterized in that: The bottom plate (100) is connected to a rotating plate (110), and four groups of limiting columns (160) are arranged above the rotating plate (110). In the installed state, the four groups of limiting columns (160) are respectively inserted into four angles of the piston (200) to form a rectangular limiting surface.

2. The piston inner pin hole machining device according to claim 1, characterized in that: A bidirectional screw rod (130) is rotatably arranged on the rotating plate (110), and two groups of fixing frames (150) are symmetrically screwed on the bidirectional screw rod (130), and each group of the fixing frames (150) corresponds to two limiting columns (160).

3. The piston inner pin hole machining device according to claim 2, characterized in that: The fixing frame (150) is slidably arranged on the rotating plate (110).

4. The piston inner pin hole machining device according to claim 3, characterized in that: A second bidirectional screw rod (152) is rotatably connected to the fixing frame (150), and two groups of sliding members (153) are symmetrically threaded onto the second bidirectional screw rod (152), and each group of sliding members (153) is provided with a limiting column (160).

5. The piston inner pin hole machining device according to claim 4, characterized in that: The bidirectional screw rod 2 (152) is perpendicular to the bidirectional screw rod 1 (130) on a horizontal projection plane.

6. The piston inner pin hole machining device according to any one of claims 1 to 5, characterized in that: The base plate (100) is rotatably connected to the rotating plate (110), an output motor is installed at the bottom of the base plate (100), and an output shaft of the output motor passes through the base plate (100) and is connected to the rotating plate (110).

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