Connecting structure of engine and transmission case and all-terrain vehicle
By using a connecting bracket in an all-terrain vehicle to connect the engine case with the transmission case box, the problem of box damage caused by resonance and stress concentration is solved, and a more stable connection and cost-reducing effect is achieved.
Patent Information
- Application Number
- CN202421426006.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-21
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-06-21
AI Technical Summary
The engine and transmission box of an all-terrain vehicle are prone to damage to the box due to resonance and stress concentration under harsh operating conditions. The prior art solves this problem by increasing material strength or processing technology, but it will lead to increased costs.
The connecting bracket is used to connect the engine case with the transmission case box. By increasing the connection stiffness, the modal frequency of the powertrain is increased to avoid resonance and stress concentration.
It effectively improves the connection stability between the engine and the transmission box, reduces vibration and stress, avoids box damage, and maintains low cost and high versatility.
Smart Images
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Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of all-terrain vehicles, in particular to a connection structure of an engine and a transmission box and an all-terrain vehicle. Background Art
[0002] The powertrain of an all-terrain four-wheel vehicle consists of an engine and a transmission case, which are usually connected by bolts at the attachment position of the engine output shaft and the transmission case input shaft. Since the engine and transmission case are heavy and they are only connected by bolts in a local area, the connection area is relatively weak. In addition, since the operating conditions of all-terrain vehicles are relatively harsh, resonance and stress concentration are prone to occur if the design is not appropriate, resulting in box damage failure.
[0003] Usually, in order to ensure the reliability of the engine and transmission, high-strength materials or higher processing technology can be used to strengthen the connection stiffness between the engine and the transmission, increase the modal frequency, avoid resonance, and at the same time improve the ability of the structure to resist deformation. Although the use of high-strength materials or higher processing technology can solve the problem, it will lead to increased costs. Utility Model Content
[0004] In view of this, the utility model provides a connection structure of an engine and a transmission box and an all-terrain vehicle. On the basis of maintaining the original connection between the engine and the transmission box, a connection structure with low cost, strong versatility and simple manufacturing is utilized to strengthen the connection stiffness between the engine and the transmission box, improve the modal frequency of the entire powertrain, and solve the problem of box damage caused by resonance and stress concentration during operation.
[0005] The connection structure of the engine and the transmission box and the all-terrain vehicle provided by the utility model adopt the following technical solutions:
[0006] A connection structure of an engine and a transmission case comprises an engine case, a transmission case and a connection bracket, wherein the connection bracket is located between the engine case and the transmission case and has two sides respectively fixed on the engine case and the transmission case.
[0007] By adopting the above technical solution, the engine case and the transmission case are connected by a connecting bracket, and the connection stiffness of the engine case and the transmission case is improved, the first-order bending mode of the powertrain is improved, the main excitation frequency of the engine is avoided, resonance is avoided, the vibration amplitude and stress amplitude are reduced, and the connection between the engine case and the transmission case is more stable, thereby ensuring the reliability of the powertrain during operation.
[0008] Furthermore, the engine case is provided with an engine case mounting position for mounting the connecting bracket, and both ends of the connecting bracket facing the engine case are provided with engine case mounting holes for mounting and matching with the engine case mounting position.
[0009] By adopting the above technical solution, the engine case mounting position is two bolt holes corresponding to the two engine case mounting holes one by one, and the connecting bracket is fixed to the engine case by passing the bolts through the engine case mounting holes.
[0010] Furthermore, the connecting bracket is concave inwardly toward one side of the engine case and is arranged in an arc shape to avoid the case cover of the engine case.
[0011] By adopting the above technical solution, the arc-shaped side of the connecting bracket can avoid the cylinder head on the engine case, which can prevent the connecting bracket from affecting the normal use of the engine case.
[0012] Furthermore, a transmission box body mounting position for mounting a connecting bracket is provided on the transmission box body, and transmission box body mounting holes for mounting and cooperating with the transmission box body mounting position are provided at both ends of the connecting bracket facing the transmission box body.
[0013] By adopting the above technical solution, the engine case mounting position is two bolt holes corresponding to the two engine case mounting holes one by one, and the connecting bracket is fixed to the engine case by passing the bolts through the engine case mounting holes.
[0014] Furthermore, the connecting bracket is concave inwardly in an arc shape toward one side of the transmission box body, so as to avoid the box cover of the transmission box body.
[0015] By adopting the above technical solution, the arc-shaped side edge of the connecting bracket can avoid the box cover on the transmission box body, which can prevent the connecting bracket from affecting the normal use of the transmission box.
[0016] Furthermore, the connecting bracket is provided with a plurality of staggered reinforcing ribs.
[0017] By adopting the above technical solution, the reinforcing ribs can increase the overall strength of the connecting bracket and increase the service life of the connecting bracket.
[0018] An all-terrain vehicle comprises the connection structure of an engine and a transmission box in the above technology.
[0019] To sum up, the utility model includes at least one of the following beneficial effects: connecting the engine case and the transmission case through a connecting bracket can improve the first-order bending mode of the powertrain, avoid the main excitation frequency of the engine, reduce the vibration amplitude and stress amplitude, and make the connection between the engine case and the transmission case more stable, with a simple structure, strong versatility, easy manufacturing and low cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0021] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;
[0022] Figure 2 This is a schematic diagram of the structure of the embodiment of the utility model when the connecting bracket is not installed;
[0023] Figure 3 It is a schematic structural diagram of a connecting bracket according to an embodiment of the utility model.
[0024] Description of reference numerals:
[0025] 1. Engine case; 11. Engine case mounting position; 2. Transmission case; 21. Transmission case mounting position; 3. Connecting bracket; 31. Engine case mounting hole; 32. Transmission case mounting hole; 33. Reinforcement ribs. DETAILED DESCRIPTION
[0026] The following is an explanation of the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.
[0027] The following is combined with Figure 1-3 The utility model is described in detail in this embodiment.
[0028] The utility model discloses a connection structure between an engine and a transmission box and an all-terrain vehicle. Figure 1-Figure 3 The connection structure between the engine and the transmission case includes an engine case 1, a transmission case 2 and a connection bracket 3. The connection bracket 3 is located between the engine case 1 and the transmission case 2 and is fixed on both sides of the engine case 1 and the transmission case 2. f is frequency, k is stiffness, and m is mass. The engine case 1 and the transmission case 2 are connected via a connecting bracket 3. By increasing the connection stiffness between the engine case and the transmission case, the first-order bending mode of the powertrain is improved, the main excitation frequency of the engine is avoided, resonance is avoided, the vibration amplitude and stress amplitude are reduced, and the connection between the engine case and the transmission case is more stable, thereby ensuring the reliability of the powertrain during operation.
[0029] In this embodiment, the engine case 1 is provided with an engine case mounting position 11 for installing the connecting bracket 3, and the connecting bracket 3 is provided with engine case mounting holes 31 installed and matched with the engine case mounting position 11 at both ends of the side facing the engine case 1. The engine case mounting position 11 is two bolt holes and corresponds to the two engine case mounting holes 31 one by one. The connecting bracket 3 is fixed to the engine case 1 by using bolts to pass through the engine case mounting holes 31.
[0030] In this embodiment, the connecting bracket 3 is concave inwardly toward one side of the engine case 1 and is arranged in an arc shape to avoid the cylinder head of the engine case 1. The arc-shaped side of the connecting bracket 3 can avoid the cylinder head on the engine case 1, thereby preventing the connecting bracket 3 from affecting the normal use of the case cover of the engine case 1.
[0031] In this embodiment, a transmission box case mounting position 21 for installing a connecting bracket 3 is provided on the transmission box case 2, and transmission box case mounting holes 32 for mounting and cooperating with the transmission box case mounting position 21 are provided at both ends of the connecting bracket 3 facing the transmission box case 2. The transmission box case mounting position 21 is two bolt holes and corresponds one-to-one with the two transmission box case mounting holes 32. The connecting bracket 3 is fixed to the transmission box case 2 by bolts passing through the transmission box case mounting holes 32.
[0032] In this embodiment, the connecting bracket 3 is concave inwardly toward one side of the transmission box body 2 and is arranged in an arc shape to avoid the transmission box cover. The side edge of the connecting bracket 3 arranged in an arc shape can avoid the cover on the transmission box body 2, so as to prevent the connecting bracket 3 from affecting the normal use of the transmission box.
[0033] In this embodiment, a plurality of staggered reinforcing ribs 33 are provided on the connecting bracket 3 . The reinforcing ribs 33 can increase the overall strength of the connecting bracket 3 and increase the service life of the connecting bracket 3 .
[0034] An all-terrain vehicle comprises the connection structure of an engine and a transmission box in the above technology.
[0035] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and its core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the scope of protection of this application.
Claims
1. A connection structure between an engine and a transmission box, characterized in that: The invention comprises an engine case (1), a transmission case (2) and a connecting bracket (3), wherein the connecting bracket (3) is located between the engine case (1) and the transmission case (2) and two sides of the connecting bracket (3) are respectively fixed on the engine case (1) and the transmission case (2).
2. The connection structure between the engine and the transmission box according to claim 1, characterized in that: The engine case (1) is provided with an engine case mounting position (11) for mounting a connecting bracket (3), and the connecting bracket (3) is provided with engine case mounting holes (31) at both ends of a side facing the engine case (1) for mounting with the engine case mounting position (11).
3. The connection structure between the engine and the transmission box according to claim 2, characterized in that: The connecting bracket (3) is recessed inwardly on one side of the engine case (1) and is arranged in an arc shape to avoid the case cover of the engine case (1).
4. The connection structure between the engine and the transmission box according to claim 1, characterized in that: The transmission box body (2) is provided with a transmission box body mounting position (21) for mounting a connecting bracket (3), and the connecting bracket (3) is provided with transmission box body mounting holes (32) at both ends of a side facing the transmission box body (2) for mounting and cooperating with the transmission box body mounting position (21).
5. The connection structure between the engine and the transmission box according to claim 4, characterized in that: The connecting bracket (3) is concave inwardly toward one side of the transmission box body (2) and is arranged in an arc shape so as to avoid the box cover of the transmission box body (2).
6. The connection structure between the engine and the transmission box according to claim 1, characterized in that: The connecting bracket (3) is provided with a plurality of reinforcing ribs (33) arranged in a staggered manner.
7. An all-terrain vehicle, characterized in that: The invention comprises a connection structure between an engine and a transmission box as described in any one of claims 1 to 6.