Fixture for honing small holes of variable-compression-ratio engine connecting rod

Abstract

The utility model relates to the technical field of engine connecting rod machining clamps, and discloses a variable compression ratio engine connecting rod small hole honing machining clamp which comprises a T-shaped support and a hollow arm, the hollow arm is inserted in the front face of the T-shaped support, the back face of the T-shaped support is connected with a limiting mechanism, and the limiting mechanism comprises a servo motor. The output end of the servo motor is connected with a threaded rod, the outer portion of the threaded rod is in threaded connection with a nut, inclined rods are connected to the outer portion of the nut at equal intervals through hinges, and the other end of each inclined rod is connected with a bent plate through a hinge. According to the clamp for honing the small hole of the variable-compression-ratio engine connecting rod, machining failure caused by sliding of the connecting rod during machining is avoided, meanwhile, when the small end of the connecting rod is fixed through the limiting mechanism, the bottom of the connecting rod can be supported and limited through the additionally-arranged supporting mechanism, the fixing effect on the connecting rod is improved, and machining efficiency is improved. And meanwhile, the problem that only one end of the connecting rod rotates during machining after being fixed is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of processing fixtures for engine connecting rods, in particular to a fixture for honing a small hole of a connecting rod of an engine with a variable compression ratio. Background Art

[0002] A variable compression ratio engine is an engine that can adjust the compression ratio during operation to improve fuel efficiency and performance. The variable compression ratio mechanism is usually composed of an adjustable cylinder head, piston, connecting rod, etc. When processing the engine connecting rod, a small hole needs to be opened on the outside of the small end of the engine connecting rod, so that the lubricating oil can be delivered to the small end of the connecting rod and its bushing in time for lubrication. When honing the small hole of the engine connecting rod, a clamp is needed to support and fix the connecting rod. In the existing device, a three-jaw clamp is used to fix the workpiece, but due to the special shape of the connecting rod and the different diameters of the top and bottom, the traditional clamp cannot fix the connecting rod well, which may cause the connecting rod to slip during processing, causing the tool and the connecting rod to separate, damaging the connecting rod or the tool, and increasing economic losses. Utility Model Content

[0003] 1. Technical issues to be resolved

[0004] In view of the deficiencies in the prior art, the utility model provides a fixture for honing small holes of connecting rods of variable compression ratio engines, so as to solve the technical problem that the connecting rod has a special shape and different diameters at the top and bottom, which results in the inability of traditional fixtures to fix the connecting rod well, which may cause the connecting rod to slip during processing, and then cause the tool and the connecting rod to separate, resulting in damage to the connecting rod or the tool, and increased economic losses.

[0005] (II) Technical solution

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fixture for honing small holes of connecting rods of variable compression ratio engines, comprising: a T-shaped bracket and a hollow arm, wherein the hollow arm is inserted into the front side of the T-shaped bracket, and the back side of the T-shaped bracket is connected to a limiting mechanism, wherein the limiting mechanism comprises a servo motor, and the output end of the servo motor is connected to a threaded rod, and the external thread of the threaded rod is connected to a nut, and the external part of the nut is connected to inclined rods at equal intervals through hinges, and the other end of the inclined rod is connected to a bent plate through a hinge.

[0007] The front side of the T-shaped bracket is slidably connected to a support mechanism, which includes a cross plate, and the cross plate is slidably connected to the T-shaped bracket. Both ends of the top of the cross plate are connected to long arms through hinges, and the top of the long arm is connected to the bottom of the nut through a hinge.

[0008] Preferably, a vertical groove is provided on the front side of the T-shaped bracket, and the vertical groove is slidably connected to the horizontal plate. The vertical groove facilitates the movement of the horizontal plate and can guide the horizontal plate to make the horizontal plate move linearly.

[0009] Preferably, guide rail grooves are evenly spaced on the front side of the T-shaped bracket, and a track block is slidably connected inside the guide rail groove, the track block is connected to the bent plate, and the guide rail groove cooperates with the guide rail block to guide the bent plate.

[0010] Preferably, the outside of the servo motor is connected with bent arms at equal intervals, and the bent arms are connected to the T-shaped bracket, and the bent arms can support and fix the servo motor.

[0011] Preferably, a transverse groove is provided on the top of the nut, a guide arm is slidably connected inside the transverse groove, and the guide arm is connected to the hollow arm. The transverse groove cooperates with the guide arm to guide the nut so that the nut moves linearly.

[0012] Preferably, a telescopic short rod is connected between the bent plate and the hollow arm, and the telescopic short rod includes a sliding rod, and the outer sliding rod is slidably connected to a sleeve, and the two ends of the sleeve and the sliding rod are respectively connected to the bent plate and the hollow arm. The telescopic short rod cooperates with the guide rail groove and the guide rail block to guide and support the bent plate, thereby increasing the stability of the bent plate operation.

[0013] Preferably, the top of the horizontal plate is fixedly connected with a C-shaped seat, and both ends of the bottom of the horizontal plate are connected with telescopic long rods, and the telescopic long rod includes a sliding rod, and the outer sliding rod is slidably connected with a hollow column, the hollow column is connected to the T-shaped bracket, and the sliding rod is connected to the horizontal plate. The C-shaped seat can support and fix the big end of the connecting rod, and the telescopic long rod can support and guide the horizontal plate.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the utility model provides a fixture for honing a small hole of a connecting rod of a variable compression ratio engine, which has the following beneficial effects:

[0016] The clamp for honing the small hole of the connecting rod of a variable compression ratio engine, when fixing the connecting rod, takes advantage of the roundness of the inside of the small head of the connecting rod and an added limiting mechanism to quickly fix the connecting rod from the inside of the connecting rod, thereby preventing the traditional clamp from being unable to fix the connecting rod well, thereby preventing the connecting rod from sliding during processing and causing processing failure. At the same time, when the small head of the connecting rod is fixed by the limiting mechanism, the bottom of the connecting rod can be supported and limited, thereby increasing the fixing effect of the connecting rod and avoiding the problem of rotation of the connecting rod during processing after only one end of the connecting rod is fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is a front schematic diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the back side of the utility model;

[0019] Figure 3 This is a front sectional view of the limiting mechanism of the utility model;

[0020] Figure 4 It is a front schematic diagram of the support mechanism of the utility model.

[0021] In the figure: 1, T-shaped bracket; 11, guide groove; 12, vertical groove; 2, hollow arm; 3, limit mechanism; 31, servo motor; 311, bent arm; 32, threaded rod; 33, nut; 331, transverse groove; 332, guide arm; 34, oblique rod; 35, bent plate; 351, telescopic short rod; 4, supporting mechanism; 41, long arm; 42, transverse plate; 43, telescopic long rod; 44, C-shaped seat. DETAILED DESCRIPTION

[0022] 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.

[0023] The utility model provides a technical solution, please refer to Figure 1 and Figure 2 A fixture for honing a small hole of a variable compression ratio engine connecting rod comprises: a T-shaped bracket 1 and a hollow arm 2. The T-shaped bracket 1 can support and fix the hollow arm 2. The hollow arm 2 is inserted in the front of the T-shaped bracket 1. The back of the T-shaped bracket 1 is connected to a limiting mechanism 3.

[0024] See also Figure 3 The limiting mechanism 3 includes a servo motor 31, and the outside of the servo motor 31 is evenly connected with bent arms 311, and the bent arms 311 are connected to the T-shaped bracket 1. The bent arms 311 can support and fix the servo motor 31. The output end of the servo motor 31 is connected with a threaded rod 32. The servo motor 31 can drive the threaded rod 32 to rotate the threaded rod 32. The external thread of the threaded rod 32 is connected with a nut 33. The nut 33 can perform linear motion through the rotation of the threaded rod 32, and a transverse groove 331 is provided on the top of the nut 33.

[0025] The inside of the transverse groove 331 is slidably connected to a guide arm 332, and the guide arm 332 is connected to the hollow arm 2. The transverse groove 331 cooperates with the guide arm 332 to guide the nut 33 so that the nut 33 moves linearly. The outside of the nut 33 is evenly connected to inclined rods 34 through hinges. The inclined rods 34 can be transmitted through the linear motion of the nut 33, and the other end of the inclined rod 34 is connected to a bent plate 35 through a hinge. The bent plate 35 can be driven by the inclined rod 34 to fix and limit the connecting rod. A rubber pad is connected to the end of the bent plate 35 away from the hinge.

[0026] A telescopic short rod 351 is connected between the bent plate 35 and the hollow arm 2. The telescopic short rod 351 includes a sliding rod. The outer side of the sliding rod is slidably connected to a sleeve. The two ends of the sleeve and the sliding rod are respectively connected to the bent plate 35 and the hollow arm 2. The telescopic short rod 351 cooperates with the guide rail groove 11 and the guide rail block to guide and support the bent plate 35, thereby increasing the stability of the operation of the bent plate 35. The front side of the T-shaped bracket 1 is provided with guide rail grooves 11 at equal intervals, and the inner side of the guide rail groove 11 is slidably connected to a track block, which is connected to the bent plate 35. The guide rail groove 11 cooperates with the guide rail block to guide the bent plate 35.

[0027] See also Figure 4 The front side of the T-shaped bracket 1 is slidably connected with a support mechanism 4, which includes a cross plate 42. The cross plate 42 can support and fix the bottom of the connecting rod, and the cross plate 42 is slidably connected to the T-shaped bracket 1. Both ends of the top of the cross plate 42 are connected to long arms 41 through hinges. The long arm 41 can drive the cross plate 42 to move upward through the nut 33, and the top of the long arm 41 is connected to the bottom of the nut 33 through a hinge.

[0028] A vertical groove 12 is provided on the front of the T-shaped bracket 1, and the vertical groove 12 is slidably connected to the cross plate 42. The vertical groove 12 facilitates the movement of the cross plate 42 and can guide the cross plate 42 so that the cross plate 42 can move linearly. A C-shaped seat 44 is fixedly connected to the top of the cross plate 42, and telescopic long rods 43 are connected to both ends of the bottom of the cross plate 42, and the telescopic long rod 43 includes a sliding rod, and a hollow column is slidably connected to the outside of the sliding rod. The hollow column is connected to the T-shaped bracket 1, and the sliding rod is connected to the cross plate 42. The C-shaped seat 44 can support and fix the big end of the connecting rod, and the telescopic long rod 43 can support and guide the cross plate 42.

[0029] In this solution, the small end of the connecting rod is first sleeved on the outside of the bent plate 35, and the servo motor 31 is started to drive the threaded rod 32 to rotate, and then the nut 33 is driven to move forward, and then the inclined rod 34 is driven to drive the plurality of bent plates 35 to move away from the hollow arm 2, so that the small end of the connecting rod is fixed from the inside of the connecting rod. At the same time, when the nut 33 moves, it drives the long arm 41 to drive, and then drives the cross plate 42 to move upward, so as to support and limit the bottom of the large end of the connecting rod, and cooperate with the limiting mechanism 3 to complete the fixing and limiting of the entire connecting rod;

[0030] When the connecting rod is fixed, the connecting rod is quickly fixed from the inside of the connecting rod by the added limiting mechanism 3 due to the round shape of the small end of the connecting rod, thereby preventing the traditional clamp from being unable to fix the connecting rod well, thereby preventing the connecting rod from sliding during processing and causing processing failure. At the same time, when the small end of the connecting rod is fixed by the limiting mechanism 3, the bottom of the connecting rod can be supported and limited, thereby increasing the fixing effect of the connecting rod and avoiding the problem of rotation during processing when only one end of the connecting rod is fixed.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fixture for honing a small hole of a variable compression ratio engine connecting rod, comprising: A T-shaped bracket (1) and a hollow arm (2), wherein the hollow arm (2) is inserted into the front of the T-shaped bracket (1), characterized in that: the back of the T-shaped bracket (1) is connected to a limiting mechanism (3), the limiting mechanism (3) comprises a servo motor (31), the output end of the servo motor (31) is connected to a threaded rod (32), the outer thread of the threaded rod (32) is connected to a nut (33), the outer part of the nut (33) is connected to inclined rods (34) at equal intervals through hinges, and the other end of the inclined rod (34) is connected to a bent plate (35) through a hinge; The front side of the T-shaped bracket (1) is slidably connected to a support mechanism (4), the support mechanism (4) comprises a transverse plate (42), and the transverse plate (42) is slidably connected to the T-shaped bracket (1), both ends of the top of the transverse plate (42) are connected to long arms (41) via hinges, and the top of the long arm (41) is connected to the bottom of the nut (33) via a hinge.

2. The fixture for honing a small hole of a connecting rod of a variable compression ratio engine according to claim 1, characterized in that: A vertical groove (12) is provided on the front side of the T-shaped bracket (1), and the vertical groove (12) is slidably connected to the horizontal plate (42).

3. The fixture for honing a small hole of a connecting rod of a variable compression ratio engine according to claim 1, characterized in that: The front side of the T-shaped bracket (1) is provided with guide rail grooves (11) at equal intervals, and a track block is slidably connected inside the guide rail groove (11), and the track block is connected to the bent plate (35).

4. The fixture for honing a small hole of a connecting rod of a variable compression ratio engine according to claim 1, characterized in that: The outside of the servo motor (31) is connected with bent arms (311) at equal intervals, and the bent arms (311) are connected to the T-shaped bracket (1).

5. The fixture for honing a small hole of a connecting rod of a variable compression ratio engine according to claim 1, characterized in that: A transverse groove (331) is provided on the top of the nut (33), a guide arm (332) is slidably connected inside the transverse groove (331), and the guide arm (332) is connected to the hollow arm (2).

6. The fixture for honing a small hole of a connecting rod of a variable compression ratio engine according to claim 1, characterized in that: A telescopic short rod (351) is connected between the bent plate (35) and the hollow arm (2), and the telescopic short rod (351) comprises a sliding rod, the outside of which is slidably connected to a sleeve, and the two ends of the sleeve and the sliding rod are respectively connected to the bent plate (35) and the hollow arm (2).

7. The fixture for honing a small hole of a connecting rod of a variable compression ratio engine according to claim 1, characterized in that: The top of the transverse plate (42) is fixedly connected to a C-shaped seat (44), and both ends of the bottom of the transverse plate (42) are connected to telescopic long rods (43), and the telescopic long rod (43) includes a sliding rod, and the outside of the sliding rod is slidably connected to a hollow column, the hollow column is connected to the T-shaped bracket (1), and the sliding rod is connected to the transverse plate (42).

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