Plugging structure at generator interface of transmission case for production test

Abstract

The invention provides a plugging structure at a transmission case generator interface for a production test, which comprises a generator interface on a transmission case, the inner side wall of the generator interface is provided with a communication port communicated with an oil gas cavity of the transmission case, and the inner wall of a generator interface body is circumferentially provided with a limiting ring table; the end face of the limiting ring table is arranged on one side, close to the outer end of the generator interface, of the communicating port; the plug comprises a plugging part and a limiting part, the diameter of the plugging part is the same as the inner diameter of the limiting ring table, so that the side wall of the plugging part can plug the communicating opening, and the limiting part can abut against the end face of the limiting ring table; and a drawing head can be arranged in the center of the plug. According to the invention, the plug-in part is arranged on the plug, so that part of the plug can extend into the limiting ring table, oil gas in the crankcase is prevented from being sprayed out from the communication port and entering other parts of the transmission case, and the test reliability is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of transmission boxes, and in particular relates to a blocking structure at an interface of a transmission box generator for production testing. Background Art

[0002] In the design process before the mass production of the engine, it is necessary to first produce a prototype according to the design, and then test the performance of the prototype to determine whether the performance of the prototype meets the design standards. Due to the requirements of vehicle performance, in order to meet the battery charging problem, the newly designed engine will be designed with a charging generator installation interface, and in order to ensure the lubrication of the internal structure of the charging generator, the oil and gas chamber of the engine will be connected to the internal cavity of the charging generator. Therefore, an oil circuit connection port is set at the location of the installation interface to facilitate the connection of the engine to the charging generator after mass production and installation on the vehicle. However, during the testing phase, since the charging generator does not need to be installed, the interface of the charging generator needs to be blocked first to prevent the internal oil and gas from spraying out. However, when the end face around the charging generator interface of the engine is narrow, the existing plug is not convenient for cooperating with the interface to complete the blocking. Summary of the invention

[0003] In view of this, the present invention aims to provide a blocking structure at the interface of a transmission box generator for production testing, so as to block the charging generator interface during the testing phase.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] A plugging structure at the interface of a transmission box generator for production testing, comprising

[0006] The generator interface body has an inner wall with a connecting port connected to the oil and gas chamber of the transmission box, and a limiting ring is provided along the inner wall of the generator interface body, and the end face of the limiting ring is placed on the side of the connecting port close to the outer end of the generator interface;

[0007] The plug includes an inserting portion and a limiting portion, wherein the diameter of the inserting portion is the same as the inner diameter of the limiting ring, the side wall of the inserting portion can block the connecting port, and the limiting portion can abut against the end surface of the limiting ring; a pulling head can be provided at the center of the plug.

[0008] Furthermore, a screw hole is opened at the center of the plug along the axis, and the pulling head is a bolt, and the bolt can be screwed into the screw hole.

[0009] Furthermore, screw holes are opened along the axis at the centers of both ends of the plug, and the pulling head is a bolt, and the bolt can be screwed into the two screw holes respectively.

[0010] Furthermore, a slot is provided on the inner wall of the generator interface, a C-shaped retaining ring can be inserted into the slot, and the end surface of the limiting portion can be against the retaining ring.

[0011] Furthermore, the plug is provided with two sealing rings, and the communication port is placed between the two sealing rings.

[0012] Furthermore, two sealing grooves are formed on the plug, and the two sealing rings are respectively placed in the two sealing grooves.

[0013] Furthermore, the two sealing rings are respectively placed on the plugging portion and the limiting portion.

[0014] Furthermore, a step surface is formed between the limiting portion and the inserting portion, and an avoidance groove is formed on the step surface near the side wall of the inserting portion.

[0015] Compared with the prior art, the blocking structure at the interface of the transmission box generator for production testing described in the present invention has the following advantages:

[0016] The present invention adopts a method of arranging a plugging portion on the plug so that a portion of the plug can be extended into the limiting ring platform, thereby preventing the oil and gas in the crankcase from spraying out from the connecting port, thereby ensuring the reliability of the test;

[0017] A pulling head is arranged in the middle of the plug, so that the plug can be pulled into the transmission box by the pulling head during installation, thereby facilitating the C-shaped retaining spring to be clamped into a predetermined position;

[0018] Bolts that match the screw holes are used as pulling heads, so that the bolts can be set at both ends of the plug. In the process of installation and removal, the position of the plug can be controlled by the pulling head, which reduces the difficulty of processing the plug.

[0019] Sealing rings are arranged on both sides of the connecting port of the oil-gas chamber to prevent oil and gas from escaping from the generator interface of the transmission box. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary 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. In the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the structure of the generator interface body;

[0022] Figure 2 It is a schematic diagram of the plug structure;

[0023] Figure 3 for Figure 2 The enlarged schematic diagram at A in the middle;

[0024] Figure 4 Schematic diagram of the plug used to seal the generator interface body.

[0025] Description of reference numerals:

[0026] 1-generator interface body; 11-oil and gas chamber; 12-limiting ring; 13-connecting port; 14-slot; 2-plug; 21-limiting part; 22-insertion part; 23-screw hole; 24-bolt; 25-sealing groove; 26-sealing ring; 27-step surface; 28-avoidance groove; 29-weak part; 3-retaining ring. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0030] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0031] The sealing structure at the transmission box generator interface for production testing described in the present invention is used to seal the charging generator interface of the newly developed transmission box to facilitate performance testing of the transmission box and prevent the oil and gas in the oil and gas chamber 11 of the transmission box from splashing out and affecting other parts in the transmission box and the external environment. Specifically, the transmission box includes a generator interface body 1, and the oil and gas chamber 11 of the transmission box is connected to the generator interface body 1 through a connecting port 13. A limit ring 12 is provided on the generator interface body 1, and the diameter of the limit ring 12 is smaller than the diameter of the generator interface body 1. In this embodiment, the connecting port 13 is placed on the limit ring 12, and a slot is also provided on the generator interface. The slot is placed on the outside of the limit ring 12, and a space is left between the limit ring 12.

[0032] The blocking structure further includes a plug 2, which includes a plugging portion 22 and a limiting portion 21. The diameter of the limiting portion 21 is larger than the diameter of the plugging portion 22. More specifically, the diameter of the limiting portion 22 is the same as the diameter of the generator interface body 1, and the diameter of the plugging portion 22 is the same as the inner diameter of the limiting ring 12, so that a step surface 27 is formed between the plugging portion 22 and the limiting portion 21. When the plug 2 is inserted into the generator interface, the plugging portion 22 extends into the limiting ring 12, so that the communication port 13 is blocked by the plugging portion 22, and at this time, the oil and gas in the oil and gas chamber 11 will be splashed onto the side wall of the plugging portion 22. In order to improve the plugging quality and prevent excessive oil and gas from overflowing from the gap between the plugging portion 22 and the limiting ring 12 to affect the external environment, two sealing rings 26 are sleeved on the plug 2, and the connecting port 13 is placed between the two sealing rings 26. The plug 2 is provided with a sealing groove 25, and the sealing ring 26 is placed in the sealing groove 25. When the plug 2 is extended into the generator interface body 1, the sealing ring 26 can be tightly pressed against the side wall of the generator interface body 1. Specifically, the sealing groove 25 is respectively provided on the limiting portion 21 and the plugging portion 22, so that the oil and gas can only be free between the two sealing rings 26. The step surface 27 is provided with an avoidance groove 28 near the side wall of the insertion part 22, so that a weak portion 29 is formed at the edge of the limit portion 21 and the insertion part 22. When the plug 2 is placed in the predetermined position, the weak portion 29 is deformed against the end surface of the limit ring 12, and the corners of the limit ring 12 can be placed in the avoidance groove 28 to prevent the corners of the limit ring 12 from affecting the sealing effect of the plug 2. Through the extrusion and deformation of the weak portion, a second barrier is formed between the connecting port 13 and the outside world to prevent oil and gas from entering the external environment. At the same time, the avoidance groove 28 makes it easier to install the plug 2 to the predetermined position. A C-shaped retaining ring 3 is provided in the slot of the generator interface body 1, and the outer end of the plug 2 is against the C-shaped retaining ring 3 to prevent the plug 2 from axial movement.

[0033] Through testing, it was found that if pressure is simply applied to the plug 2 from the outside, it is easy to cause the plug 2 to tilt when it is inserted into the predetermined position. In addition, since the opening of the generator interface body 1 is small, when force is applied to the plug 2 from the outside of the transmission box, it is not convenient to place the retaining ring 3 into the generator interface at the same time due to the influence of the force-applying tool and the hand. For the convenience of operation, a pulling head is axially arranged in the middle part of the plug 2. The pulling head is a raised structure protruding from the end face of the plug 2. During the installation of the plug 2, the pulling head can be pulled by tools such as pliers, so that the plug 2 moves into the generator interface body 1 under uniform force. In this embodiment, the pulling head is a bolt 24 installed on the plug 2. Specifically, a screw hole 23 is opened along the axis in the middle of the plug 2, and the screw hole 23 passes through the plug 2. The bolt 24 can be screwed with both ends of the screw hole 23 respectively. During use, when the plug 2 needs to be installed, the bolt 24 can be screwed into the end of the screw hole 23 close to the insertion part 22, and then the bolt 24 is pulled in the transmission box to make the plug 2 enter the predetermined position, and then the retaining ring 3 is inserted into the slot, and the bolt 24 is tightened to complete the blocking of the generator interface body 1 and conduct a test; when the test is completed, the bolt 24 can be removed, and then screwed into the end of the screw hole 23 close to the limiting part 21, so that the bolt 24 can be pulled out of the generator interface body 1 after the retaining ring 3 is removed.

[0034] In other embodiments, the plug 2 may be provided with two screw holes 23, and the bolts 24 are respectively screwed to the two screw holes 23, thereby completing the installation and removal of the plug 2. From the processing point of view, one screw hole 23 is easier to process than two screw holes 23.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A blocking structure at the interface of a transmission box generator for production testing, comprising a generator interface body on the transmission box, the inner wall of which is provided with a communication port connected to the oil and gas chamber of the transmission box, a limiting ring platform is provided along the inner wall of the generator interface body, and the end face of the limiting ring platform is placed on the side of the communication port close to the outer end of the generator interface, characterized in that: It also includes a plug, which includes an inserting part and a limiting part, and the inserting part can be placed in the limiting ring and block the connecting port, and the limiting part can be against the end surface of the limiting ring; a pulling head can be provided at the center of the plug.

2. The blocking structure at the interface of the transmission box generator for production testing according to claim 1 is characterized in that: A screw hole is opened at the center of the plug along the axis, and the pulling head is a bolt, which can be screwed into the screw hole.

3. The blocking structure at the interface of the transmission box generator for production testing according to claim 1 is characterized in that: Screw holes are opened along the axis at the centers of the two ends of the plug, and the pulling head is a bolt, which can be screwed into the two screw holes respectively.

4. The blocking structure at the interface of the transmission box generator for production testing according to claim 1 is characterized in that: A slot is provided on the inner wall of the generator interface body, a C-shaped retaining ring can be inserted into the slot, and the end surface of the limiting portion can be against the retaining ring.

5. The blocking structure at the interface of the transmission box generator for production testing according to claim 1 is characterized in that: The plug is sleeved with two sealing rings, and the communication port is placed between the two sealing rings.

6. The blocking structure at the interface of the transmission box generator for production testing according to claim 5 is characterized in that: The plug is provided with two sealing grooves, and the two sealing rings are respectively placed in the two sealing grooves.

7. The blocking structure at the interface of the transmission box generator for production testing according to claim 5 is characterized by: The two sealing rings are respectively placed on the plugging portion and the limiting portion.

8. The blocking structure at the interface of the transmission box generator for production testing according to claim 5 is characterized by: A step surface is formed between the limiting portion and the inserting portion, and an avoidance groove is formed on the step surface near the side wall of the inserting portion.

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