Adjustable guiding and positioning device for machining big head hole of engine connecting rod

Abstract

The utility model discloses an adjustable guiding and positioning device for engine connecting rod big head hole machining belongs to the field of vehicle accessory machining technology, including processing mesa and the installation arm of setting above processing mesa, the middle part one side of installation arm is provided with the tensioning assembly, is installed with engine connecting rod on the tensioning assembly, and the small head hole of engine connecting rod is set on the tensioning assembly, the bottom of installation arm is provided with the bearing, the top of installation arm is provided with the compression piece, engine connecting rod is located between bearing and compression piece, one side of installation arm is installed with the mounting bracket, through the installation arm that sets up, can realize the installation of tensioning assembly, bearing and compression piece respectively to realize the fixation of engine connecting rod small head end with tensioning assembly, bearing and compression piece, is convenient for the boring processing of engine connecting rod big head hole, and clamping is fixed stable and reliable, guarantees the precision of boring processing to it.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts processing technology, specifically relating to an adjustable guide and positioning device for processing the big end hole of an engine connecting rod. Background Technology

[0002] The engine connecting rod is mainly a component that connects the piston and the crankshaft. The small end of the engine connecting rod connects to the piston, while the large end of the engine connecting rod connects to the crankshaft. The large end of the engine connecting rod is a separate structure, which is connected by bearing shells and bolts.

[0003] According to the authorization announcement number CN213105570U, a positioning fixture for connecting rod milling is known prior art. Although this patent can achieve the advantage of automatic clamping and loosening of the connecting rod, the technical solution of this patent still has the following defects in actual use: because the small end positioning pin and the large end positioning pin are inserted into the small end hole and the large end hole respectively, it is not possible to perform boring machining on the inside of the large end hole of the engine connecting rod, and it is impossible to achieve positioning for boring machining on the inside of the large end hole of the engine connecting rod, resulting in poor practical application effect. Utility Model Content

[0004] The purpose of this invention is to provide an adjustable guide and positioning device for machining the big end hole of an engine connecting rod, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an adjustable guide and positioning device for machining the large end hole of an engine connecting rod, comprising a machining table and a mounting arm disposed above the machining table. A tensioning component is disposed on one side of the middle portion of the mounting arm, and an engine connecting rod is mounted on the tensioning component, with the small end hole of the engine connecting rod fitted onto the tensioning component. A support member is disposed at the bottom end of the mounting arm, and a clamping member is disposed at the top end of the mounting arm. The engine connecting rod is located between the support member and the clamping member. A mounting frame is disposed on one side of the mounting arm, and a laser emitter is disposed at the end of the mounting frame, which coincides with the center line of the large end hole of the engine connecting rod.

[0006] In a preferred embodiment, a mounting ring is provided on the inner side of the middle part of the mounting arm, a base is provided at the bottom end of the mounting arm, and an upper arm is provided at the top end of the mounting arm.

[0007] In a preferred embodiment, the mounting bracket is a multi-directional adjustable structure.

[0008] In a preferred embodiment, the tensioning assembly includes a mounting plate fixed to the mounting arm. A hydraulic cylinder is fixedly mounted on one side of the mounting plate, and an actuating shaft is provided inside the hydraulic cylinder. A bushing is fixedly sleeved on the outside of the actuating shaft, and a bushing fixed to the side wall of the mounting plate is sleeved on the outside of the actuating shaft. Several sliding grooves are opened on the bushing. Several rotating arms are provided on the outer wall of the bushing, and a support plate is connected to the outer end of the rotating arm. A slider inserted into the sliding groove is fixedly mounted at the end of the support plate.

[0009] In a preferred embodiment, the support plates are distributed in a ring around the outside of the bushing, and there are several support plates. An outer liner is fixedly installed on the upper surface of the support plates.

[0010] In a preferred embodiment, the support includes a screw threaded into the threaded opening of the mounting arm, a locking nut on the outside of the screw, a handle at the bottom of the screw, a triangular seat fixedly connected to the top of the screw, a pin on the top of the triangular seat, and a retainer connected to the top of the triangular seat via the pin.

[0011] In a preferred embodiment, the clamping component includes a second hydraulic cylinder fixed to the upper end of the mounting arm, and a telescopic rod is provided below the second hydraulic cylinder. The bottom end of the telescopic rod is connected to a second clamping seat through a triangular seat and a pin.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This adjustable guide and positioning device for machining the big end hole of the engine connecting rod, through the set mounting arm, can realize the installation of the tensioning component, the support component and the clamping component respectively, thereby realizing the fixation of the small end of the engine connecting rod by using the tensioning component, the support component and the clamping component, which facilitates the boring of the big end hole of the engine connecting rod. The clamping and fixing is stable and reliable, ensuring the accuracy of the boring process. This adjustable guide positioning device for machining the large end hole of the engine connecting rod uses a mounting bracket to install the laser emitter, ensuring that the position of the laser emitter coincides with the center line of the large end hole of the engine connecting rod. This enables centering of the large end hole of the engine connecting rod, aligning the machine tool spindle with the center line of the large end hole, which is more conducive to positioning during the installation and machining of the engine connecting rod, and improves the machining accuracy of the large end hole of the engine connecting rod. Attached Figure Description

[0013] Figure 1 This is a front view of the engine connecting rod installation state of the structure of this utility model; Figure 2 This is a side view of the structure of this utility model; Figure 3 This is a front view of the structure of this utility model with the engine connecting rod removed. Figure 4 This is a cross-sectional view of the tensioning component of the present invention. Figure 5 This is a front view of the support component of the present utility model structure; Figure 6 This is a front view of the clamping component of this utility model.

[0014] In the diagram: 1. Machining table; 2. Mounting arm; 21. Mounting ring; 22. Base support; 23. Upper arm; 3. Engine connecting rod; 4. Mounting bracket; 5. Laser emitter; 6. Tensioning assembly; 61. Mounting plate; 62. Hydraulic cylinder one; 63. Actuating shaft; 64. Bushing; 65. Liner ring; 66. Slide groove; 67. Rotating arm; 68. Support plate; 69. Outer liner; 70. Slider; 7. Support component; 71. Screw; 72. Locking nut; 73. Handle; 74. Triangular seat; 75. Pin; 76. Card seat one; 8. Clamping component; 81. Hydraulic cylinder two; 82. Telescopic rod; 83. Card seat two. Detailed Implementation

[0015] The present invention will be further described below with reference to the embodiments.

[0016] The following embodiments are used to illustrate the present invention, but should not be used to limit the scope of protection of the present invention. The conditions in the embodiments can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention are all within the scope of protection claimed by the present invention.

[0017] Please see Figure 1 and Figure 3 This utility model provides an adjustable guide and positioning device for machining the big end hole of an engine connecting rod, including a machining table 1 and a mounting arm 2 disposed above the machining table 1. A mounting ring 21 is provided on the inner side of the middle part of the mounting arm 2, a bottom support 22 is provided at the bottom end of the mounting arm 2, and an upper arm 23 is provided at the top end of the mounting arm 2.

[0018] In this embodiment, the positioning device is installed and fixed on the machine tool by mounting arm 2 and bolts. The machine tool is a boring machine tool for machining engine connecting rod 3, which can perform boring machining on the big end hole of engine connecting rod 3. The tensioning component 6 is installed by mounting ring 21, the support component 7 is installed by base support 22, and the clamping component 8 is installed by upper arm 23.

[0019] Please see Figure 1 , Figure 2 and Figure 4A tensioning assembly 6 is provided on one side of the middle portion of the mounting arm 2. An engine connecting rod 3 is mounted on the tensioning assembly 6, and the small end hole of the engine connecting rod 3 is fitted onto the tensioning assembly 6. The tensioning assembly 6 includes a mounting plate 61 fixed to the mounting arm 2. A hydraulic cylinder 62 is fixedly mounted on one side of the mounting plate 61, and an actuating shaft 63 is provided inside the hydraulic cylinder 62. A bushing 64 is fixedly fitted on the outside of the actuating shaft 63, and a bushing 65 fixed to the side wall of the mounting plate 61 is fitted on the outside of the actuating shaft 63. Several sliding grooves 66 are opened on the bushing 65. Several rotating arms 67 are provided on the outer wall of the bushing 64. Furthermore, the outer end of the rotating arm 67 is connected to a support plate 68, and the end of the support plate 68 is fixedly provided with a slider 70 inserted into the slide groove 66. The slider 70 has an I-shaped structure and is sleeved on the outside of one end of the bushing 65. The slider 70 can slide inside the slide groove 66. The support plates 68 are distributed in a ring on the outside of the bushing 64. The number of support plates 68 is three to six, and the number of support plates 68 is preferably four. An outer liner 69 is fixedly installed on the upper surface of the support plate 68. The outer liner 69 is made of wear-resistant material or coated with a wear-resistant coating to ensure reliable fixed positioning of the small end of the engine connecting rod 3 after the support plate 68 is opened.

[0020] In this embodiment, the tensioning assembly 6 is used to fix the small end of the engine connecting rod 3. The hydraulic cylinder 62 is activated, causing the actuating shaft 63 of the hydraulic cylinder 62 to retract, thereby driving the bushing 64 to move simultaneously. Due to the movement of the bushing 64, the moving part of the rotating arm 67 rotates, which can push the support plate 68 outward. At the same time, the slider 70 moves inside the slide groove 66. By using multiple support plates 68 to push outward at the same time, the stability of the fixation of the small end of the engine connecting rod 3 is ensured.

[0021] Please see Figure 1 , Figure 2 and Figure 5 The bottom end of the mounting arm 2 is provided with a support 7, which includes a screw 71 threaded into the threaded opening of the mounting arm 2, and a locking nut 72 is provided on the outside of the screw 71. A handle 73 is installed at the bottom end of the screw 71, and a triangular seat 74 is fixedly connected to the top end of the screw 71. A pin 75 is provided above the triangular seat 74, and a retainer 76 is connected above the triangular seat 74 through the pin 75. The retainer 76 can rotate on the triangular seat 74 through the pin 75, which is suitable for supporting the engine connecting rod 3 with different slopes.

[0022] In this embodiment, the support member 7 provides support for the lower part of the engine connecting rod 3. Depending on the specifications of the engine connecting rod 3, the operator can rotate the screw 71 by holding the handle 73. The rotation of the screw 71 is used to adjust the height, so that the bracket 76 is stably engaged with the lower part of the engine connecting rod 3.

[0023] Please see Figure 1 , Figure 2 and Figure 6 The top of the mounting arm 2 is provided with a clamping member 8. The engine connecting rod 3 is located between the support member 7 and the clamping member 8. The clamping member 8 includes a hydraulic cylinder 2 81 fixed to the upper end of the mounting arm 2, and a telescopic rod 82 is provided below the hydraulic cylinder 2 81. The bottom end of the telescopic rod 82 is connected to a card seat 2 83 through a triangular seat 74 and a pin 75.

[0024] In this embodiment, the clamping member 8 is used to clamp and position the upper part of the engine connecting rod 3. By activating the hydraulic cylinder 81, the telescopic rod 82 can be driven to move up and down, thereby causing the triangular seat 74 and the second clamping seat 83 at the bottom of the telescopic rod 82 to descend, so that the second clamping seat 83 is tightly clamped to the upper part of the engine connecting rod 3.

[0025] Please see Figure 1 A mounting bracket 4 is installed on one side of the mounting arm 2, and a laser emitter 5 is provided at the end of the mounting bracket 4, which coincides with the center line of the large end hole of the engine connecting rod 3. The mounting bracket 4 is a multi-directional adjustable structure.

[0026] In this embodiment, the laser emitter 5 is a Lino series (such as Lino L2P5) that projects a visible laser line. The linear light emitted by the laser emitter 5 is used to achieve the alignment and positioning of the central axis of the large end hole of the engine connecting rod 3 with the machine tool spindle. The mounting bracket 4 can be adjusted in multiple directions by bolts, thereby adjusting the installation position of the laser emitter 5. It is suitable for use with various specifications of engine connecting rods 3.

[0027] The working principle and usage process of this utility model are as follows: First, the operator fixes the mounting arm 2 to the machine tool with bolts, and then fixes the mounting frame 4 to the mounting arm 2. By adjusting the position of the mounting frame 4, the straight light emitted by the laser emitter 5 is made to coincide with the center line of the machine tool spindle. Next, the small end hole at the end of the engine connecting rod 3 is fitted onto the outside of the tensioning assembly 6. The hydraulic cylinder 62 is activated, causing the actuating shaft 63 of the hydraulic cylinder 62 to retract, thereby driving the bushing 64 to move simultaneously. Due to the movement of the bushing 64, the moving part of the rotating arm 67 rotates, which can push the support plate 68 outward. At the same time, the slider 70 moves inside the slide groove 66. By using multiple support plates 68 to push outward simultaneously, the stability of the small end of the engine connecting rod 3 is ensured. The operator adjusts the support 7 and rotates the handle 73 to drive the screw 71 to rotate, thereby adjusting the height of the triangular seat 74 by the screw 71, so that the card seat 76 is engaged with the lower part of the engine connecting rod 3. At this time, the engine connecting rod 3 is adjusted so that the central axis of the large end hole of the engine connecting rod 3 coincides with the straight line light of the laser emitter 5. Finally, by activating the clamping component 8, the operator can cause the hydraulic cylinder 81 to lower the telescopic rod 82. The telescopic rod 82 then drives the clamping seat 83 to be tightly clamped above the engine connecting rod 3, thereby achieving better and more comprehensive positioning of the engine connecting rod 3 and improving the precision of boring the large end hole of the engine connecting rod 3.

[0028] In the above scheme, it should be noted that: the laser emitter 5, hydraulic cylinder 62 and hydraulic cylinder 81 in this application are all existing products, and the specific structure, circuit (or pipeline) layout and working principle of the laser emitter 5, hydraulic cylinder 62 and hydraulic cylinder 81 are all existing publicly disclosed technical means. At the same time, the laser emitter 5, hydraulic cylinder 62 and hydraulic cylinder 81 can all be started or stopped manually in sequence, which will not be described in detail here.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adjustable guide and positioning device for machining the big end hole of an engine connecting rod, comprising a machining table (1) and a mounting arm (2) disposed above the machining table (1), characterized in that: A tensioning assembly (6) is provided on one side of the middle part of the mounting arm (2). An engine connecting rod (3) is mounted on the tensioning assembly (6). The small end hole of the engine connecting rod (3) is fitted onto the tensioning assembly (6). A support member (7) is provided at the bottom end of the mounting arm (2). A clamping member (8) is provided at the top end of the mounting arm (2). The engine connecting rod (3) is located between the support member (7) and the clamping member (8). A mounting bracket (4) is mounted on one side of the mounting arm (2). A laser emitter (5) is provided at the end of the mounting bracket (4) and coincides with the center line of the large end hole of the engine connecting rod (3).

2. The adjustable guide and positioning device for machining the big end hole of an engine connecting rod according to claim 1, characterized in that: The mounting arm (2) has a mounting ring (21) on the inner side of the middle part, a base support (22) at the bottom end of the mounting arm (2), and an upper arm (23) at the top end of the mounting arm (2).

3. The adjustable guide and positioning device for machining the big end hole of an engine connecting rod according to claim 1, characterized in that: The mounting bracket (4) is a multi-directional adjustable structure.

4. The adjustable guide and positioning device for machining the big end hole of an engine connecting rod according to claim 1, characterized in that: The tensioning assembly (6) includes a mounting plate (61) fixed to the mounting arm (2). A hydraulic cylinder (62) is fixedly installed on one side of the mounting plate (61). An actuating shaft (63) is installed inside the hydraulic cylinder (62). A bushing (64) is fixedly sleeved on the outside of the actuating shaft (63). A bushing (65) fixed on the side wall of the mounting plate (61) is sleeved on the outside of the actuating shaft (63). A plurality of sliding grooves (66) are opened on the bushing (65). A plurality of rotating arms (67) are installed on the outer wall of the bushing (64). A support plate (68) is connected to the outer end of the rotating arm (67). A slider (70) inserted into the sliding groove (66) is fixedly installed at the end of the support plate (68).

5. The adjustable guide and positioning device for machining the big end hole of an engine connecting rod according to claim 4, characterized in that: The support plates (68) are distributed in a ring around the outside of the bushing (64). There are several support plates (68), and an outer liner (69) is fixedly installed on the upper surface of the support plates (68).

6. The adjustable guide and positioning device for machining the big end hole of an engine connecting rod according to claim 1, characterized in that: The support member (7) includes a screw (71) threaded into the threaded opening of the mounting arm (2), a locking nut (72) is provided on the outside of the screw (71), a handle (73) is installed at the bottom end of the screw (71), a triangular seat (74) is fixedly connected to the top end of the screw (71), a pin (75) is provided above the triangular seat (74), and a card seat (76) is connected above the triangular seat (74) through the pin (75).

7. An adjustable guide and positioning device for machining the big end hole of an engine connecting rod according to claim 6, characterized in that: The clamping component (8) includes a hydraulic cylinder two (81) fixed to the upper end of the mounting arm (2). A telescopic rod (82) is provided below the hydraulic cylinder two (81). The bottom end of the telescopic rod (82) is connected to a card seat two (83) through a triangular seat (74) and a pin (75).

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