An auxiliary tool for facilitating assembly of a camshaft

Abstract

The utility model discloses a kind of auxiliary tool facilitating camshaft assembly, it is related to engine manufacturing technical field, including base, the inside of base is provided with fixed mechanism, the fixed mechanism includes first connecting rod, the inside of base is inserted by bearing to the first connecting rod, the surface of the first connecting rod is fixed with rotating block, the surface of the first connecting rod is sleeved with first fixed block, and the top of first fixed block is fixed with second fixed block. The utility model is provided with first connecting rod and rotating block, cooperate first fixed block and second fixed block, so that the device can fix the camshaft of different length, improve the assembly effect of device, camshaft is clamped in the arc-shaped groove of second fixed block, promote second connecting rod, so that third fixed block presses cam and fixes, since second fixed block is clamped in the middle position of camshaft, so the device can be fixed to camshaft of different lengths, and second fixed block can adjust pitch.

Description

Technical Field

[0001] This application relates to the field of engine manufacturing technology, specifically to an auxiliary tooling that facilitates camshaft assembly. Background Technology

[0002] The camshaft is a component in a piston engine. Its function is to control the opening and closing of the valves. Although the camshaft rotates at half the speed of the crankshaft in a four-stroke engine (while in a two-stroke engine it rotates at the same speed), its speed is usually still very high, and it needs to withstand a large torque. Therefore, the design of the camshaft requires high strength and support, and its material is generally high-quality alloy steel or alloy steel. Because the valve movement pattern affects the power and operating characteristics of an engine, camshaft design plays a very important role in the engine design process.

[0003] Cam bearings are subjected to cyclic impact loads. The contact stress between the cam and the tappet is high, and the relative sliding speed is also high, resulting in severe wear on the cam's working surface. To address this, in addition to high dimensional accuracy, low surface roughness, and sufficient rigidity, the camshaft journal and cam working surface should also possess high wear resistance and good lubrication.

[0004] The applicant found through a search that a Chinese patent discloses "an assembly fixture for a camshaft", with publication number "CN212947556U3". This patent mainly uses a worktable, on the upper side of which a placement block is fixedly connected, and on the upper side of which a hydraulic cylinder is fixedly connected. The telescopic end of the hydraulic cylinder and the upper side of the worktable are both provided with clamping boxes. The two clamping boxes are respectively fixedly connected to the upper side of the worktable and the telescopic end of the hydraulic cylinder. The inside of the clamping box is provided with a clamping mechanism for clamping the workpiece. This utility model has a reasonable structural design, which can fix camshafts of different diameters, greatly increasing the applicability of the device and saving time for changing fixtures, thereby greatly improving work efficiency. The use of hydraulic cylinders to replace manual assembly improves the assembly accuracy. Secondly, the center position of the camshaft and the component is always on the same horizontal line, eliminating the need for adjustment and correction, saving time and facilitating operation. However, the existing device still has shortcomings. The existing device has an insufficient fixing mechanism, which can only be fixed and adjusted according to the thickness of the camshaft. The fixing effect is insufficient for camshafts of different lengths or with different cam clearances. Furthermore, the existing device requires components such as cup plugs to be assembled onto the camshaft during installation. However, the assembly fixture disclosed does not have a temporary storage mechanism for these components, which requires an additional placement mechanism or space during installation. This increases the operation steps and time, which is not conducive to the assembly of the camshaft. Summary of the Invention

[0005] Therefore, this application provides an auxiliary tooling that facilitates camshaft assembly, in order to solve the problems of insufficient fixed structure and insufficient temporary storage mechanism in the prior art.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] In a first aspect, an auxiliary tooling for facilitating camshaft assembly includes a base, the base having an internal fixing mechanism. The fixing mechanism includes a first connecting rod, which is inserted into the base via a bearing. A rotating block is fixed to the surface of the first connecting rod, a first fixing block is sleeved on the surface of the first connecting rod, and a second fixing block is fixed to the top of the first fixing block. A rubber pad is fixed to the surface of the second fixing block, a second connecting rod is inserted into the interior of the second fixing block, and a helical spring is sleeved on the surface of the second connecting rod. A third fixing block is fixed to the surface of the second connecting rod.

[0008] Optionally, the base is provided with a sliding groove that matches the first fixing block, and the first fixing block is inserted into the base to facilitate the movement of the second fixing block.

[0009] Optionally, the base has a square groove inside, which is located on both sides of the second fixing block to facilitate the placement of assembly accessories.

[0010] Optionally, the base has two sets of square grooves inside, and the bottom of the square grooves has oblique strip grooves at equal intervals, which play a role in preventing slippage when placing accessories.

[0011] Optionally, the surface of the first connecting rod is provided with threads, the interior of the first fixing block is provided with threaded holes, the first connecting rod is inserted into the interior of the first fixing block, and the first connecting rod is threadedly connected to the first fixing block to facilitate the movement of the second fixing block.

[0012] Optionally, the second fixing block has an arc-shaped through hole inside, and there are two sets of the second fixing blocks to facilitate locking and fixing the camshaft.

[0013] Optionally, the second connecting rod has a square structure and is inserted inside the second fixed block to prevent rotation when the third fixed block moves.

[0014] Optionally, the helical spring is fixedly connected to the second fixed block on the side closer to the second fixed block, and fixedly connected to the second connecting rod on the side farther away from the second fixed block, so as to facilitate locking and fixing the camshaft.

[0015] Compared with the prior art, this application has at least the following beneficial effects:

[0016] 1. The device is equipped with a first connecting rod and a rotating block, which, together with a first fixing block and a second fixing block, enable the device to fix camshafts of different lengths, improving the assembly effect of the device. The camshaft is locked in the arc-shaped groove of the second fixing block, and the second connecting rod is pushed so that the third fixing block presses and fixes the cam. Since the second fixing block is locked in the middle position of the camshaft, the device can fix camshafts of different lengths. Moreover, the spacing of the second fixing block can be adjusted, and the gap position of the cam on the camshaft can also be adjusted, thereby locking and fixing, improving the working efficiency of the device.

[0017] 2. The device is equipped with a base and a first connecting rod, which, together with the first fixing block and the second fixing block, make the device more convenient to assemble. The square groove on the base is used to temporarily place the assembled parts and tools, which optimizes the operation of the device during assembly, shortens the distance for picking up parts and tools, saves time, and speeds up the assembly efficiency. Attached Figure Description

[0018] To more intuitively illustrate the prior art and this application, exemplary drawings are provided below. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing this application; for example, based on the technical concept disclosed in this application and the exemplary drawings, those skilled in the art are able to easily make conventional adjustments or further optimizations to the addition / reduction / classification, specific shapes, positional relationships, connection methods, size ratios, etc. of certain units (components).

[0019] Figure 1 A side-view perspective structural schematic diagram of an auxiliary tooling for facilitating camshaft assembly, provided as an embodiment of this application;

[0020] Figure 2 A schematic diagram of the cross-section of an auxiliary tooling for facilitating camshaft assembly, provided in one embodiment of this application;

[0021] Figure 3 A top view of an auxiliary tooling for facilitating camshaft assembly, provided in one embodiment of this application;

[0022] Figure 4 This is an exploded view of the second connecting rod of an auxiliary tooling for facilitating camshaft assembly, provided in one embodiment of this application.

[0023] Explanation of reference numerals in the attached figures:

[0024] In the diagram: 1. Base; 2. Fixing mechanism; 210. First connecting rod; 220. Rotating block; 230. First fixing block; 240. Second fixing block; 250. Rubber pad; 260. Second connecting rod; 270. Helical spring; 280. Third fixing block. Detailed Implementation

[0025] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. Example

[0026] like Figures 1 to 4 As shown, an auxiliary tooling for facilitating camshaft assembly according to the first aspect of this utility model includes a base 1. A fixing mechanism 2 is provided inside the base 1. The fixing mechanism 2 includes a first connecting rod 210, which is inserted into the base 1 via a bearing. A rotating block 220 is fixed to the surface of the first connecting rod 210. A first fixing block 230 is sleeved on the surface of the first connecting rod 210, and a second fixing block 240 is fixed to the top of the first fixing block 230. A rubber pad 250 is fixed to the surface of the second fixing block 240. A second connecting rod 260 is inserted inside the second fixing block 240, and a coil spring 270 is sleeved on the surface of the second connecting rod 260. A third fixing block 280 is fixed to the surface of the second connecting rod 260. The interior of the base 1... A sliding groove adapted to the first fixing block 230 is provided. The first fixing block 230 is inserted into the base 1. The surface of the first connecting rod 210 is provided with threads. The interior of the first fixing block 230 is provided with threaded holes. The first connecting rod 210 is inserted into the interior of the first fixing block 230 and is threadedly connected to the first fixing block 230. The interior of the second fixing block 240 is provided with arc-shaped through holes. There are two sets of second fixing blocks 240. The second connecting rod 260 has a square structure and is inserted into the interior of the second fixing block 240. The side of the helical spring 270 close to the second fixing block 240 is fixedly connected to the second fixing block 240, and the side of the helical spring 270 away from the second fixing block 240 is fixedly connected to the second connecting rod 260.

[0027] The technical effect achieved by the above embodiment is as follows: Rotating the rotating block 220 causes the first connecting rod 210 to rotate. The first connecting rod 210 is threadedly connected to the first fixing block 230. The base 1 limits the first fixing block 230, preventing it from rotating. This allows the first fixing block 230 to move under the rotation of the first connecting rod 210, enabling the second fixing block 240 to move. The position of the second fixing block 240 is adjusted so that it is positioned within the gap between the cams of the camshaft to be assembled. Then, the camshaft is placed in the arc-shaped groove of the second fixing block 240, so that the gap between the cams is engaged in the arc-shaped groove of the second fixing block 240. Then, the second connecting rod 260 is pushed, causing the third fixing block 280 to move, allowing the cams of the camshaft to... The second connecting rod 260 is released when the second fixing rod is loosened between the third fixing block 280 and the second fixing block 240. This allows the third fixing block 280 to spring back under the action of the coil spring 270, pressing and fixing the camshaft cam. This secures the camshaft on the device, facilitating assembly. The design of the second fixing block 240, which is locked onto the camshaft, allows the device to fix camshafts of different lengths. The arc-shaped through-hole design of the second fixing block 240 also allows the device to lock and fix camshafts of different thicknesses. The distance of the second fixing block 240 can be adjusted by rotating the rotating block 220, allowing the device to adjust the locking position according to the camshaft cam clearance. This results in better fixing of the camshaft during assembly and eliminates the need for frequent tooling changes due to size limitations. Example

[0028] like Figures 1 to 4 As shown, an auxiliary tooling for camshaft assembly includes all the contents of Embodiment 1. In addition, a square groove is provided inside the base 1, and the square groove is provided on both sides of the second fixing block 240. Two sets of square grooves are provided inside the base 1, and oblique strip grooves are provided at equal intervals at the bottom of the square grooves.

[0029] The technical effects achieved by the above embodiments are as follows: the accessories and tools required for assembly are placed in the square groove in advance, which reduces the time required for the device to retrieve and use accessories and tools during assembly, saves workers' physical strength, and shortens the assembly time. The integrated design makes the device more convenient to operate. The slanted strip groove at the bottom of the square groove increases the surface friction, making it less likely for the accessories and tools placed in the square groove to slide, thus improving the stability during placement.

[0030] The technical features of the above embodiments can be combined in any way (as long as there is no contradiction in the combination of these technical features). For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described; these embodiments not explicitly written should also be considered to be within the scope of this specification.

Claims

1. An auxiliary tooling for facilitating camshaft assembly, comprising a base (1), characterized in that, The base (1) is provided with a fixing mechanism (2) inside. The fixing mechanism (2) includes a first connecting rod (210). The first connecting rod (210) is inserted into the base (1) through a bearing. A rotating block (220) is fixed on the surface of the first connecting rod (210). A first fixing block (230) is sleeved on the surface of the first connecting rod (210). A second fixing block (240) is fixed at the top of the first fixing block (230). A rubber pad (250) is fixed on the surface of the second fixing block (240). A second connecting rod (260) is inserted inside the second fixing block (240). A helical spring (270) is sleeved on the surface of the second connecting rod (260). A third fixing block (280) is fixed on the surface of the second connecting rod (260).

2. The auxiliary tooling for facilitating camshaft assembly according to claim 1, characterized in that, The base (1) has a sliding groove inside that is adapted to the first fixing block (230), and the first fixing block (230) is inserted inside the base (1).

3. The auxiliary tooling for facilitating camshaft assembly according to claim 1, characterized in that, The base (1) has a square groove inside, which is located on both sides of the second fixing block (240).

4. The auxiliary tooling for facilitating camshaft assembly according to claim 3, characterized in that, The base (1) has two sets of square grooves inside, and the bottom of the square grooves has oblique strip grooves at equal intervals.

5. The auxiliary tooling for facilitating camshaft assembly according to claim 1, characterized in that, The surface of the first connecting rod (210) is provided with threads, the interior of the first fixing block (230) is provided with threaded holes, the first connecting rod (210) is inserted into the interior of the first fixing block (230), and the first connecting rod (210) is threadedly connected to the first fixing block (230).

6. The auxiliary tooling for facilitating camshaft assembly according to claim 5, characterized in that, The second fixing block (240) has an arc-shaped through hole inside, and there are two sets of the second fixing block (240).

7. The auxiliary tooling for facilitating camshaft assembly according to claim 1, characterized in that, The second connecting rod (260) has a square structure and is inserted into the second fixing block (240).

8. The auxiliary tooling for facilitating camshaft assembly according to claim 1, characterized in that, The helical spring (270) is fixedly connected to the second fixed block (240) on the side closer to the second fixed block (240), and the helical spring (270) is fixedly connected to the second connecting rod (260) on the side away from the second fixed block (240).

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