Camshaft cover preassembling mechanism

Abstract

The invention discloses a camshaft cover preassembling mechanism which comprises a conveying line body (1), a material stopper (2) and a jacking device (3), the jacking device (3) is arranged below the conveying line body (1), the material stopper (2) is arranged at the top of one side of the conveying line body (1), an assembling plate (4) is arranged above the conveying line body (1), a sliding plate (5) is movably installed on the assembling plate (4), and the sliding plate (5) is arranged on the conveying line body (1). And a plurality of detection blocks (6) are arranged at the bottom of the sliding plate (5). The camshaft cover assembling tool can effectively prevent assembling errors during camshaft cover assembling, and the mounting accuracy is guaranteed during preassembling.

Description

Technical Field

[0001] The invention relates to a pre-assembly mechanism, in particular to a camshaft cover pre-assembly mechanism. Background Art

[0002] The camshaft hole in the engine cylinder head is a key hole system for assembling the camshaft transmission. Before the camshaft hole is processed, it is usually necessary to install an independent camshaft cover. The camshaft cover is connected to the cylinder head by bolts. Affected by the cylinder head structure, the camshaft cover is generally designed as an eccentric structure (not completely symmetrical along the center line of the camshaft hole). Therefore, the direction must be correct during assembly. Otherwise, if the installation error is not discovered in time, it will cause irreversible damage to the subsequent finishing tool. Therefore, preventing errors in the installation of the camshaft cover during process design is the top priority to ensure the quality of camshaft hole processing.

[0003] Currently, there are two ways to inspect the camshaft cover installation: the first is to ensure installation accuracy through visual inspection after manual assembly, but manual inspection cannot achieve 100% effective monitoring; the other is to use a visual camera to take a picture of the camshaft cover direction after manual or automatic assembly, and an error alarm will be prompted. The use of a visual camera for photo inspection has a high investment cost, and secondary rework is required after errors are discovered, which cannot prevent assembly errors from occurring. Summary of the Invention

[0004] The purpose of the present invention is to provide a camshaft cover pre-assembly mechanism to solve the technical problems in the prior art. The mechanism can effectively prevent assembly errors when assembling the camshaft cover and ensure the accuracy of installation during pre-assembly.

[0005] The present invention provides a camshaft cover pre-installation mechanism, comprising a transmission line body, a material stopper and a lifting device, wherein the lifting device is arranged below the transmission line body, the material stopper is arranged at the top of one side of the transmission line body, an assembly plate is arranged above the transmission line body, a slide is movably mounted on the assembly plate, and a plurality of detection blocks are provided at the bottom of the slide.

[0006] In the aforementioned camshaft cover pre-assembly mechanism, preferably, the transmission line body includes a roller conveyor and a first support leg, a plurality of the first support legs are provided at the bottom of the roller conveyor, and the lower ends of the first support legs are fixedly connected to the ground.

[0007] In the aforementioned camshaft cover pre-installation mechanism, preferably, the jacking device includes a jacking cylinder, a cylinder bracket and a jacking frame, the cylinder bracket is fixed to the bottom of the roller conveyor, the jacking cylinder is fixed on the cylinder bracket, and the jacking frame is installed on the cylinder rod end of the jacking cylinder.

[0008] In the aforementioned camshaft cover pre-installation mechanism, preferably, one end of the assembly plate is fixedly connected to the left side frame of the roller conveyor through two columns, and the other end of the assembly plate is provided with a second support leg, which is located on the right side of the roller conveyor, and the lower end of the second support leg is fixedly connected to the ground.

[0009] In the aforementioned camshaft cover pre-assembly mechanism, preferably, a rectangular hole is provided on the assembly plate, a guide plate is provided on the left and right sides of the rectangular hole respectively, the slide plate is slidably installed on the top of the assembly plate through the two guide plates, and a plurality of rectangular operating holes are provided on the slide plate.

[0010] In the aforementioned camshaft cover pre-assembly mechanism, preferably, the detection block is a semicircular chamfered structure.

[0011] In the aforementioned camshaft cover pre-assembly mechanism, preferably, a first stop and a second stop are provided on the top of the assembly plate, an in-position detector is provided on one side of the first stop, and a detection plate cooperating with the in-position detector is fixed on the side of the slide.

[0012] The aforementioned camshaft cover pre-assembly mechanism preferably further includes a PLC programmable controller, and the material stopper, the lifting cylinder and the in-position detector are all electrically connected to the PLC programmable controller.

[0013] Compared with the existing technology, the present invention can stop the cylinder head conveyed by the transmission line at a fixed position through the material stopper, and can lift the cylinder body through the jacking device, so that the cylinder head can contact the detection block at the bottom of the slide. The setting of the detection block ensures that the direction is unique during manual assembly of the camshaft cover, eliminating assembly errors from the source, with 100% error-proofing effectiveness, avoiding the waste of work time caused by secondary rework. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is an axonometric drawing of the present invention;

[0015] Figure 2 It is an axonometric drawing of the local structure of the present invention;

[0016] Figure 3 yes Figure 2 a top view of the structure shown;

[0017] Figure 4 It is a cross-sectional view of the present invention in use.

[0018] Explanation of the accompanying drawings: transmission line body 1, material stopper 2, lifting device 3, assembly plate 4, slide plate 5, detection block 6, roller conveyor 7, first support leg 8, lifting cylinder 9, cylinder bracket 10, column 11, second support leg 12, guide plate 13, rectangular operating hole 14, detection plate 15, first stop block 16, second stop block 17, in-position detector 18, cylinder head 19, camshaft cover 20, handle 21. DETAILED DESCRIPTION

[0019] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0020] Embodiments of the present invention: Figures 1-4 As shown, a camshaft cover pre-installation mechanism includes a transmission line body 1, a material stopper 2 and a lifting device 3, the lifting device 3 is arranged below the transmission line body 1, the material stopper 2 is arranged at the top of one side of the transmission line body 1, an assembly plate 4 is arranged above the transmission line body 1, a slide plate 5 is movably mounted on the assembly plate 4, and a plurality of detection blocks 6 are provided at the bottom of the slide plate 5.

[0021] The transmission line body 1 is used to transport the cylinder head 19, the material stopper 2 is used to stop the cylinder head 19 at a preset position, the lifting device 3 is used to lift the cylinder head 19, so that the cylinder head 19 rises to a preset position to facilitate the assembly of the camshaft cover 20, and the detection block 6 is used to cooperate with the camshaft cover 20 to prevent the camshaft cover 20 from being installed upside down.

[0022] Specifically, the transmission line body 1 includes a roller conveyor 7 and first supporting legs 8. A plurality of first supporting legs 8 are provided at the bottom of the roller conveyor 7, and the lower ends of the first supporting legs 8 are fixedly connected to the ground.

[0023] The roller conveyor 7 is an existing device and can be purchased directly. It should be noted that the roller conveyor 7 is too long to be fully displayed in the figure, so only a part of the roller conveyor 7 is shown in the drawings of the present invention.

[0024] Furthermore, the jacking device 3 includes a jacking cylinder 9, a cylinder bracket 10 and a jacking frame. The cylinder bracket 10 is fixed to the bottom of the roller conveyor 7, the jacking cylinder 9 is fixed on the cylinder bracket 10, and the jacking frame is installed at the end of the cylinder rod of the jacking cylinder 9.

[0025] The jacking frame is not shown in the figure. The jacking frame is a prior art and is relatively common in this field. The jacking frame consists of a base plate and multiple support rods. The end of the piston rod of the jacking cylinder 9 is fixedly connected to the center position of the base plate. According to the type of cylinder head to be lifted, multiple support rods are welded and fixed on the base plate, and each support rod can extend from the gap between the rollers on the roller conveyor 7.

[0026] The lifting cylinder 9 is an existing product that can be purchased directly. When the piston rod of the lifting cylinder 9 is extended, the support rod on the lifting frame extends from the gap between the rollers on the roller conveyor 7 and abuts against the cylinder cover 19, lifting the cylinder cover 19.

[0027] Furthermore, one end of the assembly plate 4 is fixedly connected to the left side frame of the roller conveyor 7 through two columns 11, and the other end of the assembly plate 4 is provided with a second support leg 12. The second support leg 12 is located on the right side of the roller conveyor 7, and the lower end of the second support leg 12 is fixedly connected to the ground.

[0028] The arrangement of the uprights 11 is to ensure that the bottom surface of the assembly plate 4 is at a certain height from the top surface of the roller conveyor 7 so that the cylinder head 19 can pass smoothly. The assembly plate 4 is arranged horizontally.

[0029] A rectangular hole is formed on the assembly plate 4 , and a guide plate 13 is provided on the left and right sides of the rectangular hole respectively. The slide plate 5 is slidably mounted on the top of the assembly plate 4 through the two guide plates 13 . The slide plate 5 has multiple rectangular operating holes 14 formed on it.

[0030] The arrangement of the two guide plates 13 enables the slide plate 5 to slide only in the front-rear direction. In this embodiment, the incoming direction is the rear direction, and the outgoing direction is the front direction.

[0031] In order to facilitate the staff to move the slide 5, a handle 21 can be provided on the top of the slide 5.

[0032] The number of detection blocks 6 and rectangular operating holes 14 on the slide 5 can be adjusted based on actual needs. For example, in this embodiment, nine detection blocks 6 are provided at the bottom of the slide 5, and eight rectangular operating holes 14 are provided on the slide 5. The detection blocks 6 have chamfered semicircular edges that match the semicircular shape on the camshaft cover 20. This is the first contour-based structure. If the camshaft cover 20 is assembled in the incorrect orientation, it will not fit on the detection blocks 6. The rectangular operating holes 14 in this embodiment are also specially designed to limit the front and rear positions of the camshaft cover 20. This is the second contour-based structure. Limited by the detection blocks 6 and rectangular operating holes 14, the camshaft cover 20 can only be assembled in a single orientation, truly achieving contour-based error prevention.

[0033] Furthermore, a first stopper 16 and a second stopper 17 are provided on the top of the assembly plate 4. A position detector 18 is provided on one side of the first stopper 16. A detection plate 15 is fixed to the side of the slide plate 5 to cooperate with the position detector 18. The first stopper 16 and the second stopper 17 are used to limit the freedom of movement of the slide plate 5.

[0034] Furthermore, this embodiment further includes a PLC programmable controller (not shown in the figure), and the material stopper 2, the lifting cylinder 9 and the in-position detector 18 are all electrically connected to the PLC programmable controller. The PLC programmable controller is a commercially available product and can be purchased directly.

[0035] The working principle of the present invention is as follows: the cylinder head 19 is transported by the roller conveyor 7. When the cylinder head 19 contacts the material stopper 2, the material stopper 2 sends a signal to the PLC programmable controller, which controls the roller conveyor 7 to stop running. At the same time, the position detector 18 detects whether the slide 5 is in place. If it is not in place, an alarm is issued to remind the staff to operate the slide 5. The alarm reminder can be achieved by an audible and visual alarm. The audible and visual alarm is a commercially available product that can be purchased directly. The audible and visual alarm is electrically connected to the PLC programmable controller. After receiving the audible and visual alarm, the staff knows that they need to operate the slide 5. In the case where the audible and visual alarm is not set, the PLC programmable controller does not execute the next step when it detects that the slide 5 is not in place. The detection is repeated every preset time until the slide 5 is detected in place and then the next step is executed.

[0036] Under normal circumstances, the staff moves the slide plate 5 before the cylinder cover 19 is in place, so that the slide plate 5 contacts the first stopper 16. At this time, the detection plate 15 on the slide plate 5 is aligned with the in-place detector 18.

[0037] When the cylinder head 19 contacts the material stopper 2, the PLC programmable controller controls the roller conveyor 7 to stop running. The PLC programmable controller detects that the slide 5 is in place through the in-position detector 18. The PLC programmable controller controls the jacking cylinder 9 to extend. The jacking cylinder 9 lifts the cylinder head 19 to a position 5-10 mm away from the bottom surface of the assembly plate 4 and stops. At this time, the various detection blocks 6 on the slide 5 are respectively aligned with the various semicircular grooves on the cylinder head 19. Under the restrictions of the detection blocks 6 and the rectangular operating holes 14, the staff installs each camshaft cover 20 in turn. If the direction of the camshaft cover 20 is wrong during assembly, it cannot be assembled. The camshaft cover 20 is pre-installed on the cylinder head 19 with bolts.

[0038] After assembly is completed, the slide 5 is moved by the handle 21 so that the slide 5 contacts the second stopper 17. At this time, all the detection blocks 6 are separated from the camshaft cover 20, and the detection plate 15 is away from the in-position detector 18. The in-position detector 18 sends an out-of-position signal to the PLC programmable controller. After receiving the out-of-position signal, the PLC programmable controller controls the retraction of the lifting cylinder 9, and the cylinder head 19 falls onto the roller conveyor 7. The PLC programmable controller then controls the retraction of the stopper 2. The PLC programmable controller then controls the roller conveyor 7 to continue running, and the cylinder head 19 with the camshaft cover 20 assembled is transported to the next process. After the preset time, the PLC programmable controller controls the extension of the stopper 2 to enter the next working cycle.

[0039] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings. The above is only a preferred embodiment of the present invention, but the scope of implementation of the present invention is not limited to what is shown in the drawings. Any changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which do not exceed the spirit covered by the description and drawings, should be within the scope of protection of the present invention.

Claims

1. A camshaft cover pre-assembly mechanism, characterized in that: The invention comprises a transmission line body (1), a material stopper (2) and a lifting device (3), wherein the lifting device (3) is arranged below the transmission line body (1), the material stopper (2) is arranged on the top of one side of the transmission line body (1), an assembly plate (4) is arranged above the transmission line body (1), a slide plate (5) is movably mounted on the assembly plate (4), and a plurality of detection blocks (6) are provided at the bottom of the slide plate (5).

2. The camshaft cover pre-assembly mechanism according to claim 1, characterized in that: The transmission line body (1) comprises a roller conveyor (7) and a first support leg (8); a plurality of the first support legs (8) are provided at the bottom of the roller conveyor (7); and the lower ends of the first support legs (8) are fixedly connected to the ground.

3. The camshaft cover pre-assembly mechanism according to claim 2, characterized in that: The jacking device (3) includes a jacking cylinder (9), a cylinder bracket (10) and a jacking frame, wherein the cylinder bracket (10) is fixed to the bottom of the roller conveyor (7), the jacking cylinder (9) is fixed on the cylinder bracket (10), and the jacking frame is installed at the end of the cylinder rod of the jacking cylinder (9).

4. The camshaft cover pre-assembly mechanism according to claim 3, characterized in that: One end of the assembly plate (4) is fixedly connected to the left side frame of the roller conveyor (7) through two columns (11), and the other end of the assembly plate (4) is provided with a second support leg (12), the second support leg (12) is located on the right side of the roller conveyor (7), and the lower end of the second support leg (12) is fixedly connected to the ground.

5. The camshaft cover pre-assembly mechanism according to claim 4, characterized in that: A rectangular hole is provided on the assembly plate (4), and a guide plate (13) is provided on the left and right sides of the rectangular hole respectively. The slide plate (5) is slidably mounted on the top of the assembly plate (4) through the two guide plates (13), and a plurality of rectangular operating holes (14) are provided on the slide plate (5).

6. The camshaft cover pre-assembly mechanism according to claim 1, characterized in that: The detection block (6) is a semicircular chamfered structure.

7. The camshaft cover pre-assembly mechanism according to claim 5, characterized in that: A first stopper (16) and a second stopper (17) are provided on the top of the assembly plate (4), an in-position detector (18) is provided on one side of the first stopper (16), and a detection plate (15) cooperating with the in-position detector (18) is fixed on the side of the slide plate (5).

8. The camshaft cover pre-assembly mechanism according to claim 7, characterized in that: It also includes a PLC programmable controller, and the material stopper (2), the lifting cylinder (9) and the in-position detector (18) are all electrically connected to the PLC programmable controller.

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