Anti-rotation fixing tool

Abstract

The utility model discloses an anti-rotation fixing tool which comprises a tool body. The at least one first connecting piece is arranged on the tool body in a penetrating mode, and the first connecting piece is used for being connected with a cylinder body mounting hole in the engine cylinder body in an aligned mode; the at least one second connecting piece is arranged on the tool main body in a penetrating manner, and the second connecting piece is used for being connected with a flywheel edge mounting hole in the flywheel in an aligned manner; wherein the tool main body is detachably connected with an engine cylinder body through at least one first connecting piece, and the tool main body is detachably connected with a flywheel through at least one second connecting piece. In the embodiment of the utility model, the flywheel is connected with the engine cylinder body through the anti-rotation fixing tool, so that the position of the flywheel is fixed, the rotation of the flywheel is limited, the rotation of the crankshaft connected with the flywheel is further limited, and the flywheel without a gear ring can be adapted.

Description

Technical Field

[0001] This utility model relates to the field of engine assembly technology, and in particular to an anti-rotation fixing fixture. Background Technology

[0002] Currently, the TVD (Torsional Vibration Damper) bolts at the front end of the crankshaft and the flywheel bolts at the rear end often require a large tightening torque when tightened. This tightening torque can cause the crankshaft to rotate, so anti-rotation fixing fixtures need to be designed accordingly.

[0003] For traditional internal combustion engines, a gear ring is usually fitted on the flywheel connected to the crankshaft. Existing anti-rotation fixing fixtures usually include a toothed part, which is used to fix and lock the flywheel.

[0004] However, for range-extender engines, the flywheel connected to the crankshaft is usually not fitted with a gear ring, which means that existing anti-rotation fixing fixtures, including toothed sections, cannot be directly applied to the flywheel in range-extender engines. Utility Model Content

[0005] This utility model provides an anti-rotation fixing fixture, which aims to at least solve the technical problem that existing anti-rotation fixing fixtures including toothed parts cannot be directly applied to the flywheel in range-extended engines.

[0006] This utility model embodiment provides an anti-rotation fixing fixture, including:

[0007] Tooling body;

[0008] At least one first connector is provided on the tooling body, and the first connector is used to align and connect with the cylinder block mounting hole on the engine block.

[0009] At least one second connector is provided on the tooling body, and the second connector is used to align and connect with the flywheel edge mounting hole on the flywheel.

[0010] The tooling body is detachably connected to the engine cylinder block via at least one first connecting member, and the tooling body is detachably connected to the flywheel via at least one second connecting member.

[0011] Optionally, the tooling body is provided with at least one positioning hole, which is used to cooperate with the positioning pin on the flywheel.

[0012] Optionally, the tooling body has at least one first mounting hole, and at least one first connector is respectively passed through at least one first mounting hole;

[0013] The tooling body is also provided with at least one second mounting hole, and at least one second connector is respectively inserted into at least one second mounting hole.

[0014] Optionally, the tooling body includes a main plate portion and at least one pad portion, the position of at least one pad portion corresponds one-to-one with the position of at least one first mounting hole, the first mounting hole penetrates through the main plate portion and the pad portion, and the second mounting hole penetrates through the main plate portion;

[0015] The main body plate has a back surface facing the engine cylinder block, the pad portion protrudes from the back surface of the main body plate, and the pad portion is used to contact the engine cylinder block.

[0016] Optionally, the main body plate has a first side near at least one of the second mounting holes, the first side being an arc-shaped side recessed toward at least one of the second mounting holes.

[0017] Optionally, the second mounting hole is a circular hole or an arc-shaped hole, wherein the extending direction of the arc-shaped hole is parallel to the extending direction of the first side.

[0018] Optionally, the main body plate has a second side near at least one of the first mounting holes, the second side being disposed opposite to the first side, and the second side being an arc-shaped side that protrudes outward from at least one of the first mounting holes.

[0019] Optionally, the first connector is a first connecting bolt, and the second connector is a second connecting bolt;

[0020] The number of the first connecting bolts is at least two, and the number of the second connecting bolts is at least two.

[0021] Optionally, the main body plate portion is integrally formed with at least one of the pad portions.

[0022] Optionally, the first mounting hole is a circular hole, or the first mounting hole is an oblong hole.

[0023] In this embodiment of the invention, the tooling body is connected to the engine block and flywheel via a first connector and a second connector, using the cylinder block mounting holes on the engine block and the flywheel edge mounting holes on the flywheel. This allows the flywheel to be connected to the engine block via the anti-rotation fixing tooling, thereby fixing the flywheel's position and restricting its rotation. This, in turn, restricts the rotation of the crankshaft connected to the flywheel, ensuring that the crankshaft does not rotate during the tightening of the flywheel bolts and TVD bolts. Furthermore, the second connector is used to align with the flywheel edge mounting holes on the flywheel to accommodate flywheels without a gear ring, meaning it can be used with flywheels in range-extender engines. This solves the problem that existing anti-rotation fixing tooling with toothed sections cannot be directly applied to flywheels in range-extender engines. Additionally, the detachable connection facilitates the assembly and disassembly of the tooling body. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0025] Figure 1 This is a schematic diagram of the structure of an anti-rotation fixing tool provided in an embodiment of the present utility model;

[0026] Figure 2 This is a front structural diagram of the main body of the anti-rotation fixing fixture provided in an embodiment of the present utility model;

[0027] Figure 3 This is a schematic diagram of the back structure of the main body of the anti-rotation fixing fixture provided in an embodiment of the present utility model;

[0028] Figure 4 This is a schematic diagram of the main body of another anti-rotation fixing fixture provided in this embodiment of the utility model;

[0029] Figure 5 This is a schematic diagram of the structure of an anti-rotation fixing tool provided in an embodiment of the present invention, which cooperates with the engine cylinder block and flywheel.

[0030] Figure label:

[0031] 1-Anti-rotation fixing fixture, 11-Main fixture body, 111-First mounting hole, 112-Second mounting hole, 113-Positioning hole, 114-Main body plate, 1141-First side, 1142-Second side, 1143-Back surface, 115-Padded block, 12-First connector, 13-Second connector, 2-Engine cylinder block, 21-Cylinder block rear flange, 211-Cylinder block mounting hole, 3-Flywheel, 31-Flywheel edge mounting hole, 32-Positioning pin, 4-Flywheel bolt. Detailed Implementation

[0032] The technical solutions of the present invention will now be described with reference to the accompanying drawings in the embodiments of the present invention.

[0033] The embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention. The invention will be described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention.

[0034] In traditional internal combustion engines, the flywheel connected to the crankshaft is typically fitted with a gear ring. Existing anti-rotation fixing fixtures usually include a toothed portion to lock the flywheel in place. However, in range-extended engines, the flywheel connected to the crankshaft typically does not have a gear ring, making existing anti-rotation fixing fixtures with toothed portions unsuitable for use with the flywheel in range-extended engines. To address this issue, this utility model provides an anti-rotation fixing fixture, which is described in detail below.

[0035] Reference Figure 1 , Figure 2 and Figure 5 The anti-rotation fixing fixture 1 provided in this embodiment of the utility model includes: a fixture body 11; at least one first connecting member 12, which is disposed on the fixture body 11 and is used to align and connect with the cylinder mounting hole 211 on the engine cylinder block 2; at least one second connecting member 13, which is disposed on the fixture body 11 and is used to align and connect with the flywheel edge mounting hole 31 on the flywheel 3; wherein, the fixture body 11 is detachably connected to the engine cylinder block 2 through at least one first connecting member 12, and the fixture body 11 is detachably connected to the flywheel 3 through at least one second connecting member 13.

[0036] The vehicle includes an engine, which comprises an engine block 2 and a crankshaft. The rear end of the crankshaft is connected to a flywheel 3 via flywheel bolts 4, and the front end of the crankshaft is connected to a torsional damper via TVD bolts. The engine block 2 includes a rear flange 21 with multiple cylinder block mounting holes 211. The flywheel 3 has multiple flywheel edge mounting holes 31 along its circumferential edge. This anti-rotation fixing fixture 1 is specifically used to prevent the flywheel 3 and crankshaft from rotating during the assembly process of the flywheel bolts 4 at the rear end and the TVD bolts at the front end of the crankshaft in the vehicle.

[0037] The tooling body 11 may include a main plate portion 114, which may be an arc-shaped plate structure. The tooling body 11 may be made of steel. The first connecting member 12 may be a first connecting bolt, a first plastic clip, etc. In this embodiment, the first connecting member 12 is preferably a first connecting bolt with high connection reliability. The number of first connecting members 12 can be set according to actual needs, such as one, two, three, four, five, six, etc. In this embodiment, the number of first connecting members 12 may be three. The second connecting member 13 may be a second connecting bolt, a second plastic clip, etc. In this embodiment, the second connecting member 13 is preferably a second connecting bolt with high connection reliability. The number of second connecting members 13 can be set according to actual needs, such as one, two, three, four, five, six, etc. In this embodiment, the number of second connecting members 13 may be three. The detachable connection between the tooling body 11 and the engine block 2 and flywheel 3 is preferably a bolted connection.

[0038] When using the anti-rotation fixing fixture 1, firstly, the crankshaft and flywheel 3 are assembled onto the engine block 2, and then rotated to a specific position; then, at least one second connecting piece 13 is used to connect and fix the fixture body 11 to the flywheel 3; then, at least one first connecting piece 12 is used to connect and fix the fixture body 11 to the engine block 2, thereby achieving the purpose of connecting and fixing the crankshaft and flywheel 3 to the engine block 2; finally, the flywheel bolt 4 and TVD bolt are assembled, and the anti-rotation fixing fixture 1 can be disassembled after assembly. It should be noted that when assembling the crankshaft and flywheel 3 onto the engine block 2, the crankshaft is first assembled into the engine block 2, and then the flywheel 3 can be positioned and connected to the rear end of the crankshaft by the positioning piece to limit the relative position of the flywheel 3 and the crankshaft.

[0039] This utility model provides an anti-rotation fixing fixture 1 for a range extender engine. By means of the cylinder mounting hole 211 on the engine block 2 and the flywheel edge mounting hole 31 on the flywheel 3, the fixture body 11 is connected to the engine block 2 and the flywheel 3 through the first connector 12 and the second connector 13. This allows the flywheel 3 to be connected to the engine block 2 through the anti-rotation fixing fixture 1, thereby fixing the position of the flywheel and restricting its rotation. In turn, it restricts the rotation of the crankshaft connected to the flywheel, so as to ensure that the crankshaft will not rotate during the tightening of the flywheel bolt 4 and the TVD bolt.

[0040] In this embodiment of the invention, the second connector 13 is used to align and connect with the flywheel edge mounting hole 31 on the flywheel 3, so as to adapt to the flywheel without a gear ring, that is, it can be used for the flywheel in the range extender engine, solving the problem that the existing anti-rotation fixing tooling including the toothed part cannot be directly applied to the flywheel in the range extender engine. In addition, the detachable connection method facilitates the disassembly and assembly of the tooling body 11.

[0041] In an optional embodiment of this utility model, reference is made to Figure 1 , Figure 2 and Figure 5 The fixture body 11 has at least one positioning hole 113, which is used to engage with the positioning pin 32 on the flywheel 3. The positioning pin 32 is located on the circumferential edge of the flywheel 3. The cross-sectional shape of the positioning pin 32 can be circular, in which case the shape of the positioning hole 113 is also circular. The number of positioning holes 113 can be one, two, etc., but usually there is only one. Through the engagement of the positioning hole 113 and the positioning pin 32, the fixture body 11 can be positioned during installation, ensuring that the installation position of the fixture body 11 is correct.

[0042] In an optional embodiment of this utility model, reference is made to Figures 2 to 4 The tooling body 11 has at least one first mounting hole 111, and at least one first connector 12 passes through the at least one first mounting hole 111. The tooling body 11 also has at least one second mounting hole 112, and at least one second connector 13 passes through the at least one second mounting hole 112. Preferably, the number of first mounting holes 111 is equal to the number of first connectors 12, and the number of second mounting holes 112 is preferably equal to the number of second connectors 13. Both the first mounting holes 111 and the second mounting holes 112 penetrate the tooling body 11. The arrangement of the first mounting holes 111 and the second mounting holes 112 allows the first connectors 12 and the second connectors 13 to pass through the tooling body 11, thereby enabling the connection between the tooling body 11 and other components.

[0043] In an optional embodiment of this utility model, reference is made to Figure 2 , Figure 3 and Figure 5 The tooling body 11 includes a main plate portion 114 and at least one pad portion 115. The at least one pad portion 115 corresponds one-to-one with at least one first mounting hole 111. The first mounting hole 111 penetrates the main plate portion 114 and the pad portion 115, and the second mounting hole 112 penetrates the main plate portion 114. The main plate portion 114 has a back surface 1143 for facing the engine cylinder block 2. The pad portion 115 protrudes from the back surface 1143 of the main plate portion 114 and is used to contact the engine cylinder block 2.

[0044] Specifically, the pad portion 115 contacts the rear flange face on the rear flange 21 of the cylinder block. The cross-sectional shape of the pad portion 115 matches the shape of the first mounting hole 111. For example, if the first mounting hole 111 is circular, the cross-sectional shape of the pad portion 115 is also circular. When the tooling body 11 is installed, there is a gap between the main body plate portion 114 and the engine cylinder block 2. The pad portion 115 allows the main body plate portion 114 to contact the engine cylinder block 2, thus eliminating the gap at the connection between the tooling body 11 and the engine cylinder block 2 and preventing deformation of the main body plate portion 114 during assembly.

[0045] In an optional embodiment of this utility model, reference is made to Figure 2 and Figure 3 The main body plate 114 has a first side 1141 near at least one second mounting hole 112. The first side 1141 is an arc-shaped side that is recessed towards at least one second mounting hole 112. Preferably, the curvature of this arc-shaped side that is recessed towards at least one second mounting hole 112 is less than π. The flywheel bolt 4 is inserted at the center of the flywheel 3. When the first side 1141 is an arc-shaped side that is recessed towards at least one second mounting hole 112, the distance between the first side 1141 and the flywheel bolt 4 can be effectively increased, which facilitates the assembly of the flywheel bolt 4.

[0046] In an optional embodiment of this utility model, reference is made to Figure 2 and Figure 4 The second mounting hole 112 is a circular hole or an arc-shaped waist-shaped hole, and the extension direction of the arc-shaped waist-shaped hole is parallel to the extension direction of the first side 1141.

[0047] in, Figure 2 and Figure 3 In the middle, the second mounting hole 112 is a circular hole. Figure 4 In this design, the second mounting hole 112 is an arc-shaped, waist-shaped hole. When the second mounting hole 112 is an arc-shaped, waist-shaped hole, there can be one such hole, with a relatively large arc length, which can be greater than two-thirds of the arc length of the first side 1141. Alternatively, there can be multiple arc-shaped, waist-shaped holes, in which case the arc length is shorter, less than one-third of the arc length of the first side 1141. When the second mounting hole 112 is an arc-shaped, waist-shaped hole, even if the angle of the flywheel 3 and / or the fixture body 11 changes, the position of the mounting hole 31 on the edge of the flywheel can correspond to the position of the arc-shaped, waist-shaped hole, thus enabling the fixture body 11 to adapt to assembly at more angles.

[0048] In an optional embodiment of this utility model, reference is made to Figure 2 and Figure 3 The main body plate 114 has a second side 1142 near at least one first mounting hole 111. The second side 1142 is disposed opposite to the first side 1141, and the second side 1142 is an arc-shaped side that protrudes outward from at least one first mounting hole 111. Preferably, the curvature of the arc-shaped side that protrudes outward from at least one first mounting hole 111 is less than π.

[0049] In an optional embodiment of this utility model, the first connecting member 12 is a first connecting bolt, and the second connecting member 13 is a second connecting bolt; the number of first connecting bolts is at least two, and the number of second connecting bolts is at least two, thereby achieving a more reliable fixation of the tooling body 11, making the tooling body 11 less prone to displacement or misalignment. In this embodiment, the tooling body 11 is bolted to the flywheel 3 and the engine cylinder block 2. Bolted connections are easy to assemble and disassemble, and can ensure the reliability of the connection.

[0050] In an optional embodiment of the present invention, the main body plate 114 and at least one pad block 115 are integrally formed, ensuring a seamless connection between the main body plate 114 and the pad block 115, which helps to enhance the overall structural strength and rigidity of the tooling body 11.

[0051] In an optional embodiment of this utility model, reference is made to Figure 2 The first mounting hole 111 can be either circular or oblong. When the first mounting hole 111 is circular, its structure is simple and easy to manufacture. When the first mounting hole 111 is oblong, even if the angle of the tooling body 11 changes, the position of the cylinder mounting hole 211 can correspond to the position of the oblong hole, thus enabling the tooling body 11 to adapt to assembly at more angles.

[0052] When using the aforementioned anti-rotation fixing fixture 1, firstly, the crankshaft and flywheel 3 are assembled onto the engine block 2, and then rotated to a specific position; then, the fixture body 11 is positioned by the cooperation of the positioning hole 113 and the positioning pin 32, and then the fixture body 11 is connected and fixed to the flywheel 3 using three second connecting bolts; then, the fixture body 11 is connected and fixed to the engine block 2 using three first connecting bolts, thereby achieving the purpose of connecting and fixing the crankshaft and flywheel 3 to the engine block 2; finally, the flywheel bolt 4 and TVD bolt are assembled, and the anti-rotation fixing fixture 1 can be disassembled after the assembly is completed.

[0053] In summary, this utility model provides an anti-rotation fixing fixture 1 for a range extender engine. It utilizes the cylinder mounting hole 211 on the engine block 2 and the flywheel edge mounting hole 31 and locating pin 32 on the flywheel 3. The positioning of the fixture body 11 is achieved through the cooperation of the locating pin 32 and the locating hole 113. The fixture body 11 is connected to the engine block 2 and the flywheel 3 via the first connecting piece 12 and the second connecting piece 13. This allows the flywheel 3 to be connected to the engine block 2 through the anti-rotation fixing fixture 1, thereby fixing the position of the flywheel, restricting its rotation, and consequently restricting the rotation of the crankshaft connected to the flywheel, ensuring that the crankshaft does not rotate during the tightening of the flywheel bolt 4 and the TVD bolt.

[0054] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0055] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0056] The various embodiments in this specification are described in a related manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0057] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the scope of protection of this utility model.

[0058] The anti-rotation fixing fixture provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the structure and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A fixing fixture for preventing rotation, characterized in that, include: Tooling body; At least one first connector is provided on the tooling body, and the first connector is used to align and connect with the cylinder block mounting hole on the engine block. At least one second connector is provided on the tooling body, and the second connector is used to align and connect with the flywheel edge mounting hole on the flywheel. The tooling body is detachably connected to the engine cylinder block via at least one first connecting member, and the tooling body is detachably connected to the flywheel via at least one second connecting member.

2. The anti-rotation fixing fixture according to claim 1, characterized in that, The tooling body has at least one positioning hole, which is used to cooperate with the positioning pin on the flywheel.

3. The anti-rotation fixing fixture according to claim 1 or 2, characterized in that, The tooling body has at least one first mounting hole, and at least one first connector is respectively passed through at least one first mounting hole; The tooling body is also provided with at least one second mounting hole, and at least one second connector is respectively inserted into at least one second mounting hole.

4. The anti-rotation fixing fixture according to claim 3, characterized in that, The tooling body includes a main plate and at least one pad, the position of at least one pad corresponds one-to-one with the position of at least one first mounting hole, the first mounting hole penetrates the main plate and the pad, and the second mounting hole penetrates the main plate; The main body plate has a back surface facing the engine cylinder block, the pad portion protrudes from the back surface of the main body plate, and the pad portion is used to contact the engine cylinder block.

5. The anti-rotation fixing fixture according to claim 4, characterized in that, The main body plate has a first side near at least one of the second mounting holes, the first side being an arc-shaped side recessed toward at least one of the second mounting holes.

6. The anti-rotation fixing fixture according to claim 5, characterized in that, The second mounting hole is a circular hole or an arc-shaped hole, and the extension direction of the arc-shaped hole is parallel to the extension direction of the first side.

7. The anti-rotation fixing fixture according to claim 5, characterized in that, The main body plate has a second side near at least one of the first mounting holes. The second side is disposed opposite to the first side and is an arc-shaped side that protrudes outward from at least one of the first mounting holes.

8. The anti-rotation fixing fixture according to claim 1 or 2, characterized in that, The first connecting member is a first connecting bolt, and the second connecting member is a second connecting bolt; The number of the first connecting bolts is at least two, and the number of the second connecting bolts is at least two.

9. The anti-rotation fixing fixture according to claim 4, characterized in that, The main body plate is integrally formed with at least one of the pad blocks.

10. The anti-rotation fixing fixture according to claim 3, characterized in that, The first mounting hole is a circular hole, or the first mounting hole is an oblong hole.

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