A tooling for replacing engine camshaft bearings

Abstract

This utility model belongs to the field of engine camshafts and relates to a tooling for replacing engine camshaft bearings. It includes: a pull rod with multiple limiting members spaced apart on it, the limiting members being detachably connected to the pull rod; and a pressure head movably mounted on the pull rod and cooperating with the limiting members, which limit the pressure head. The advantages of this structure are: simple structure; convenient operation due to the pull rod and pressure head design; smoother disassembly and replacement; and more even bearing stress during disassembly and replacement. Adjusting the positions of the limiting members on the pull rod allows for the replacement of bearings for different engine camshaft models.

Description

Technical Field

[0001] This utility model belongs to the field of engine camshaft technology, specifically, it relates to a tooling for replacing engine camshaft bearings. Background Technology

[0002] Camshaft bearings are a critical component in the valve train system of an internal combustion engine, designed to provide support for the camshaft and reduce friction. The camshaft is responsible for starting the engine's intake and exhaust valves, ensuring air and fuel flow into the cylinders and exhaust gases. Camshaft bearing installation is the first and most important step before camshaft installation. During engine assembly, maintenance, and troubleshooting, it is frequently necessary to disassemble and reassemble the camshaft and camshaft bearings. Because the bearings are interference-fitted onto the engine block, disassembly and reassembly present challenges due to limited operating space and difficulty.

[0003] Existing methods for disassembling camshaft bearings include pulling them out by impact and cutting them to break them apart. These methods require considerable operating space. Furthermore, the tools used for camshaft bearing disassembly are complex, increasing the labor intensity for workers, and these methods can easily scratch the camshaft bore. Therefore, improvements are necessary. Utility Model Content

[0004] To address the aforementioned problems in the prior art, this utility model provides a tooling for replacing engine camshaft bearings.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] As one aspect of this utility model, a tooling for replacing engine camshaft bearings is proposed, which includes: a tie rod, wherein a plurality of limiting members are provided at intervals on the tie rod, and the limiting members are detachably connected to the tie rod;

[0007] It also includes a pressure head, which is movably mounted on the pull rod and cooperates with a limiting member to limit the pressure head.

[0008] Optionally, the pull rod is a screw rod, and the limiting element is a nut, which is threaded onto the screw rod.

[0009] Alternatively, the pressure head may be made of nylon rubber material.

[0010] Optionally, a power unit is also included, wherein the power end of the power unit is detachably connected to one end of the pull rod.

[0011] Optionally, a connector is also included, to which the fixing part of the power unit is detachably connected.

[0012] Optionally, the pressure head includes a pressure head body, on which a semi-groove is formed along the axial direction of the pressure head body; the semi-groove extends from the center of the pressure head body to the side surface of the pressure head body; the semi-groove extends through a limiting flange, and the width of the semi-groove is greater than the diameter of the pull rod. The pressure head is mounted on the pull rod through the semi-groove, and one end face of the pressure head is connected to one end face of the limiting member, with the limiting member abutting against the pressure head.

[0013] Optionally, a limiting flange is formed at one end of the pressure head body.

[0014] Optionally, one end of the pressure head body is recessed inward to form an adapter portion, which is adapted to the limiting member.

[0015] Optionally, a mating flange is formed on one side of the limiting member, and the mating flange mates with the adapter.

[0016] Optionally, the connector includes a connector body, one end of which forms a connecting flange; a relief cavity is formed extending inward from the center of the connector body; and a connecting through hole is provided at the other end of the connector body, which communicates with the relief cavity.

[0017] The advantages of this utility model for replacing engine camshaft bearings are specifically reflected in the following aspects: simple structure, with a design that combines a pull rod and a pressure head for easy operation; more stable disassembly and replacement process, and more even bearing force; and the ability to adjust the position of the limiting part on the pull rod to replace bearings of different engine camshaft models. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0019] Figure 1 This is a structural front view of the engine camshaft bearing replacement tool of this utility model;

[0020] Figure 2 This is a rear view of the structure of the engine camshaft bearing replacement tool of this utility model;

[0021] Figure 3 This is an exploded front view of the engine camshaft bearing replacement tool of this utility model.

[0022] Figure 4 This is an exploded rear view of the engine camshaft bearing replacement tool of this utility model.

[0023] Figure 5This is a front view of the pressure head structure of this utility model;

[0024] Figure 6 This is a rear view of the pressure head structure of this utility model;

[0025] Figure 7 This is a front view of the connector structure of this utility model;

[0026] Figure 8 This is a front view of the connector structure of this utility model;

[0027] Figure 9 This is a reference diagram showing the usage state of the engine camshaft bearing replacement fixture of this utility model. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] One embodiment of this application provides a tooling for replacing an engine camshaft bearing, such as... Figures 1-4 As shown, it includes: a pull rod 1, on which a plurality of limiting members 2 are spaced apart, the limiting members 2 being detachably connected to the pull rod 1, and the spacing between two adjacent limiting members 2 being set according to the distance between two adjacent bearings of the engine camshaft; as an example, the pull rod 1 is a screw rod, the limiting members 2 are nuts, and the nuts are threadedly connected to the screw rod;

[0030] It also includes a pressure head 3, which is movably mounted on the pull rod 1 and cooperates with the limiting member 2. The limiting member 2 limits the pressure head 3. In use, the bearing 4, which is made up of two bearing bushes, is sleeved on the pressure head 3. The pull rod 1 is pulled towards the side of the bearing that needs to be replaced. The new bearing 4 is pushed out of the shaft hole of the bearing that needs to be replaced, so as to replace the bearing. After replacement, the pull rod 1 and the pressure head 3 can be taken out from the shaft hole.

[0031] In one embodiment, the pressure head 3 is made of nylon rubber material, which will not damage the bearing.

[0032] In one embodiment, such as Figures 1-4 As shown, it also includes a power unit 5, which performs linear motion; the power end of the power unit 5 is detachably connected to one end of the pull rod 1; the power unit 5 drives the pull rod 1 to move along the axis of the pull rod 1; as an example, the power unit 5 is a hydraulic cylinder, which is existing known technology and will not be described in detail here.

[0033] In one embodiment, such as Figures 1-4 As shown, it also includes a connector 6. The fixing part of the power unit 5 is detachably connected to the connector 6. In use, the connector 6 is installed on the engine block 7 to facilitate the operation of the power unit 5 and the tie rod 1. The connector 6 is installed on the engine block 7 by fasteners.

[0034] In one embodiment, such as Figures 1-6 As shown, the pressure head 3 includes a pressure head body 31, which is cylindrical and fits into the shaft hole of the engine cylinder block 7. When replacing, a new bearing 4 is fitted onto the pressure head body 31. A limiting flange 32 is formed at one end of the pressure head body 31, which is used to limit the new bearing 4.

[0035] The pressure head body 31 has a semi-groove 33, which is opened along the axial direction of the pressure head body 31. The semi-groove 33 extends from the center of the pressure head body 31 to the side surface of the pressure head body 31. The semi-groove 33 passes through the limiting flange 32. The width of the semi-groove 33 is greater than the diameter of the pull rod 1. The pressure head 3 is mounted on the pull rod 1 through the semi-groove 33. One end face of the pressure head 3 is connected to one end face of the limiting member 2. The limiting member 2 abuts against the pressure head 3, so that the pressure head 3 is engaged with the shaft hole of the engine cylinder block 7, thereby realizing the replacement of the new bearing 4 on the pressure head 3. It should be noted that after the pressure head 3 is installed on the pull rod 1, the center line of the pressure head body 31 and the center line of the pull rod 1 should coincide to ensure the coaxiality of the bearing and the shaft hole. The pressure head 3 is made of nylon rubber to avoid scratching the bearing when passing through the bearing hole, and has a semi-groove 33 for easy and quick position replacement.

[0036] In one embodiment, such as Figure 6 As shown, one end of the pressure head body 31 is recessed inward to form an adapter 34, which is adapted to the limiting member 2. As an example, the adapter 34 is a groove for limiting the nut. This design makes the limiting member 2 and the pressure head 3 fit better during operation and prevents offset.

[0037] In one embodiment, such as Figure 4 As shown, in order to increase the mating area between the limiting member 2 and the pressure head 3, a mating flange 21 is formed on one side of the limiting member 2. The mating flange 21 and the adapter 34 are mated together for better effect.

[0038] In one embodiment, such as Figures 7-8As shown, the connector 6 includes a connector body 61, one end of which forms a connecting flange 62. In use, the connecting flange 62 is detachably connected to the engine block to fix the relative position of the tie rod 1 and the power unit 5. A relief cavity 63 extends inward from the center of the connector body 61, which is used to support the old bearing. The other end of the connector body 61 is provided with a connecting through hole 64, which communicates with the relief cavity 63, for one end of the tie rod 1 to pass through and connect to the power end of the power unit 5 provided on the connector body 61.

[0039] When using, such as Figure 7 As shown, first install the power unit 5 on the connector 6, then install the connector 6 on the end face of the engine block 7. Connect the tie rod 1 to the power end of the power unit 5, so that the limiting piece 2 on the tie rod 1 is located behind the shaft hole of the engine block 7 to be replaced. The limiting piece 2 on the tie rod 1 is placed according to the axial distance of each bearing. Install the pressure head 3 on the tie rod 1, and put the replacement bearing 4 on the pressure head 3, making sure to align it with the shaft hole of the engine block 7. Place the pressure head 3 with the new bearing against the old bearing, and then the power unit 5 will act to press in the new bearing while pressing out the old bearing. The moving distance of the tie rod 1 is determined according to the height of the bearing to protect the new bearing and completely press out the old bearing. Alternatively, pressing in and pressing out can also be achieved separately by installing the pressure head 3 on the corresponding limiting piece 2.

[0040] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0041] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0042] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0043] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0044] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0045] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0046] The above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall be covered by the present utility model.

Claims

1. An engine camshaft bearing replacement tool characterized by, The utility model relates to a kind of tension rod and its limiting device, which includes: Tension rod, multiple limiters are arranged on the tension rod at intervals, and the limiter is detachably connected to the tension rod; It also includes a pressure head, which is movably arranged on the tension rod and cooperates with the limiter, and the limiter limits the pressure head.

2. The engine camshaft bearing replacement tooling of claim 1, wherein, The tension rod is a screw rod, and the limiter is a nut, which is threadedly connected to the screw rod.

3. The engine camshaft bearing replacement tooling of claim 1, wherein, The pressure head is made of nylon rubber material.

4. The engine camshaft bearing replacement tool of claim 1, wherein, It also includes a power unit, and the power end of the power unit is detachably connected to one end of the tension rod.

5. The engine camshaft bearing replacement tooling of claim 4, wherein, It also includes a connecting piece, and the fixed part of the power unit is detachably connected to the connecting piece.

6. The engine camshaft bearing replacement tool of claim 1, wherein, The pressure head includes a pressure head body, a half-slot is formed on the pressure head body, and the half-slot is formed along the axis direction of the pressure head body; the half-slot penetrates from the center of the pressure head body to the side surface of the pressure head body; the half-slot penetrates the limiting flange, and the width of the half-slot is greater than the diameter of the tension rod; the pressure head is arranged on the tension rod through the half-slot, one side end surface of the pressure head is in contact with one side end surface of the limiter, and the limiter abuts against the pressure head.

7. The engine camshaft bearing replacement tooling of claim 6, wherein, One end of the pressure head body forms a limiting flange.

8. The engine camshaft bearing replacement tooling of claim 6, wherein, The center of one end of the pressure head body is recessed inward to form an adapter, and the adapter is matched with the limiter.

9. The engine camshaft bearing replacement tooling of claim 8, wherein, One side end of the limiter forms a matching flange, and the matching flange is matched with the adapter.

10. The engine camshaft bearing replacement tool of claim 5, wherein, The connecting piece includes a connecting piece body, one end of the connecting piece body forms a connecting flange; the center of the connecting piece body extends inward to form a space; the other end of the connecting piece body is provided with a connecting through hole, and the connecting through hole is in communication with the space.

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