Long-service-life automobile speed reducer shell

Abstract

The utility model relates to the technical field of transmission cases, in particular to a long-service-life automobile speed reducer shell which comprises a lower shell body and an upper shell body arranged on the lower shell body, and a containing cavity for containing a transmission structure is formed between the upper shell body and the lower shell body in a surrounding mode. The lap joint part on the outer edge of the upper shell is in lap joint with the supporting part on the outer edge of the lower shell, and the lap joint part and the supporting part are fixedly connected through a screw assembly. A liquid containing groove with an upward groove opening and a flow blocking part protruding upwards are sequentially arranged between the containing cavity and the screw assembly and on the upper end face of the supporting part. And the flow choking part is upwards inserted into the inserting groove of the lap joint part. According to the preferable long-service-life automobile speed reducer shell, a flow choking structure is formed, so that oil liquid is prevented from flowing from the interior of the shell to the screw rod assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission boxes, and more specifically to a long-life automobile reducer housing. Background Art

[0002] Reducers are generally used for low-speed and high-torque transmission equipment. For automobiles, the power of the high-speed internal combustion engine is reduced by meshing the gear with a small number of teeth on the input shaft of the reducer with the large gear on the output shaft.

[0003] The reducer mainly includes a reducer housing and several transmission structures arranged in the housing for reducing speed, such as a gear transmission structure, a worm transmission structure, a gear-worm transmission structure, etc.

[0004] The reducer housing in some existing automobiles is mainly composed of a lower housing and an upper housing. For example, the reducer housing in an automobile reducer disclosed in the Chinese patent with the announcement number CN204153105U is composed of a reducer housing seat and a reducer housing cover installed on the reducer housing seat. A space for accommodating the transmission structure is formed between the lower housing and the upper housing.

[0005] When the reducer is working, lubricating oil and other oils need to be added. During the operation of the reducer, due to the frictional heat of the kinematic pair and the influence of the ambient temperature, the temperature inside the reducer housing rises, the pressure gradually increases, and the oil easily flows out from the housing through the assembly surface between the lower housing and the upper housing. When the oil flows out to the screw used to fix the lower housing and the upper housing, it is easy to cause erosion to the connection structure and affect the service life. Utility Model Content

[0006] The purpose of the utility model is to address the deficiencies of the prior art and provide a long-life automobile reducer housing, which forms a flow-blocking structure to hinder the flow of oil from the housing to the screw assembly, so as to solve the problem that when the reducer using the housing is working, the oil easily flows to the connecting screw, causing the connecting structure of the upper and lower housings to be corroded, thereby affecting the service life of the housing.

[0007] The technical solutions of the utility model are as follows:

[0008] A long-life automobile reducer housing, comprising:

[0009] A lower shell and an upper shell placed on the lower shell, wherein an accommodating cavity for accommodating the transmission structure is formed between the upper shell and the lower shell;

[0010] The overlapping portion of the outer edge of the upper shell overlaps the supporting portion of the outer edge of the lower shell, and the overlapping portion and the supporting portion are fixedly connected by a screw assembly;

[0011] Between the accommodating cavity and the screw assembly, the upper end surface of the support portion is provided with: a liquid containing groove with the notch facing upward, and a flow blocking portion protruding upward;

[0012] The flow blocking part is inserted upward into the inserting groove of the overlapping part.

[0013] As a further preferred solution, the lower housing is provided with: an oil guide hole extending obliquely;

[0014] The upper end of the oil guide hole extends to the bottom of the liquid containing groove, and the lower end extends to the side wall of the containing cavity, so that: the oil guide hole can guide the oil in the liquid containing groove back to the containing cavity.

[0015] As a further preferred embodiment, the oil guide hole is a straight hole extending obliquely.

[0016] As a further preferred solution, the diameter of the oil guide hole gradually decreases from top to bottom.

[0017] As a further preferred solution, the outer edge of the upper end of the blocking portion is chamfered to form a first guiding surface for guiding the blocking portion to be inserted upward into the insertion groove.

[0018] As a further preferred solution, the notch at the lower end of the insertion slot is chamfered to form a second guiding surface for guiding the flow blocking portion to be inserted upward into the insertion slot.

[0019] As a further preferred solution, the upper end of the flow blocking portion is spaced apart from the wall of the insertion slot;

[0020] A sealing member in a compressed state is installed in the interval between the upper end of the flow blocking portion and the wall of the insertion groove.

[0021] As a further preferred solution, the upper end of the flow blocking portion is provided with: a receiving groove with a notch facing upward;

[0022] The sealing member is adapted to be installed in the accommodating groove.

[0023] As a further preferred solution, the diameter of the slot opening of the accommodating slot gradually increases from bottom to top.

[0024] As a further preferred embodiment, the liquid containing tank is filled with oil-absorbing cotton.

[0025] The main beneficial effects of the above technical solution are:

[0026] The liquid containing groove and the flow blocking part inserted upward in the upper shell together constitute a flow blocking structure, which can prevent the oil from flowing out of the housing cavity of the shell to the screw assembly, slow down or even avoid the erosion of the screw assembly caused by the oil flowing from the housing cavity to the screw assembly when the reducer using the shell is working, and extend the service life of the shell.

[0027] Further or more detailed beneficial effects will be described in detail in conjunction with specific examples in the specific implementation manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The utility model is further described below in conjunction with the accompanying drawings:

[0029] Figure 1 This is a schematic diagram of the overall assembly structure of the reducer housing.

[0030] Figure 2 for Figure 1 A partial enlarged schematic diagram of part A.

[0031] Figure 3 It is an assembly schematic diagram of the overlapping part and the supporting part being fixedly connected by a screw assembly.

[0032] Figure 4 Schematic diagram of the oil guide hole structure.

[0033] Figure 5 Schematic diagram of the seal assembly structure. DETAILED DESCRIPTION

[0034] The present invention is specifically described below with reference to the embodiments:

[0035] Embodiment 1:

[0036] A long-life automobile reducer housing, as shown in the attached Figure 1 To Attachment Figure 3 As shown, it includes a lower shell 1 and an upper shell 2 placed on the lower shell 1; wherein the lower shell 1 is provided with a first groove a1 with a groove facing upward, and the upper shell 2 is provided with a second groove a2 with a groove facing downward. Figure 1 When the upper housing 2 is placed on the lower housing 1, the first groove a1 is connected to the second groove a2, so that a receiving cavity a for receiving the transmission structure is formed between the upper housing 2 and the lower housing 1. The transmission structure is a gear or a worm or a gear and a worm arranged according to the deceleration requirements.

[0037] After the upper shell 2 is placed on the lower shell 1 , the upper shell 2 and the lower shell 1 are fixedly connected by a screw assembly 3 to assemble and form a reducer housing.

[0038] Specifically, the outer edge of the upper shell 2 is convexly provided with a lap portion 2.1, and the outer edge of the lower shell 1 is convexly provided with a support portion 1.1, and the lap portion 2.1 and the support portion 1.1 are arranged in a matching manner. When the upper shell 2 is placed on the lower shell 1, the lap portion 2.1 is lapped downward on the support portion 1.1, and the lap portion 2.1 and the support portion 1.1 are fixedly connected by the screw assembly 3, so that the upper shell 2 is fixedly connected to the lower shell 1.

[0039] In this embodiment, the screw assembly 3 includes a connecting screw 3.1 and a fastening nut 3.2. Figure 2 As shown in the figure, the threaded end of the connecting screw 3.1 passes through the overlapping part 2.1 and the supporting part 1.1 from top to bottom in sequence, and then is screwed with the fastening nut 3.2. By tightening the fastening nut 3.2 upward, the nut of the connecting screw 3.1 and the fastening nut 3.2 can clamp and fasten the overlapping part 2.1 and the supporting part 1.1 together.

[0040] At this time, when the transmission structure is installed in the reducer housing, that is, the accommodating chamber a, and the transmission structure is in operation, the oil in the accommodating chamber a easily flows to the screw assembly 3 through the gap between the overlapping portion 2.1 and the supporting portion 1.1, corroding the screw assembly 3 and affecting the service life of the housing.

[0041] Based on this, in this embodiment, a flow-blocking structure is formed to prevent the oil from flowing from the housing to the screw assembly, so as to solve the problem that when the reducer using the housing is working, the oil easily flows to the connecting screw, causing the connecting structure of the upper and lower housings to be corroded, thereby affecting the service life of the housing. The service life of the housing can be extended.

[0042] Specifically, as attached Figure 1 To Attachment Figure 3 As shown, in this embodiment, between the accommodating chamber a and the screw assembly 3, the upper end surface of the support portion 1.1 is provided with: a liquid containing groove 1.2 with a notch facing upward, and a flow blocking portion 1.3 protruding upward.

[0043] To be specific, between the accommodating chamber a and the screw assembly 3, the upper end surface of the support portion 1.1 is provided with a liquid containing groove 1.2 with a notch facing upwards, and the liquid containing groove 1.2 is used to store the oil overflowing from the accommodating chamber a to prevent the oil from flowing directly and quickly to the screw assembly 3. Instead, only when the liquid containing groove 1.2 is full of oil can part of the oil flow to the screw assembly 3, thereby reducing the amount of oil that can flow to the screw assembly 3.

[0044] At the same time, between the screw assembly 3 and the liquid tank 1.2, the upper end surface of the support part 1.1 is provided with an upwardly protruding flow blocking part 1.3, and the lower end surface of the lap part 2.1 is provided with a downwardly notched insertion groove 2.2 to match the flow blocking part 1.3, and when the upper shell 2 is placed on the lower shell 1, the flow blocking part 1.3 is upwardly inserted into the insertion groove 2.2 of the lap part 2.1, so as to further prevent the oil from flowing from the liquid tank 1.2 to the screw assembly 3.

[0045] The flow-blocking structure formed by the liquid-containing groove 1.2 and the flow-blocking part 1.3 inserted upward into the upper shell 2 can prevent the oil from flowing out from the accommodating chamber a of the shell to the screw assembly 3, slow down or even avoid the erosion of the screw assembly 3 caused by the oil flowing from the accommodating chamber a to the screw assembly 3, and extend the service life of the shell.

[0046] During the installation process, the flow blocking portion 1.3 can be smoothly inserted into the insertion slot 2.2.

[0047] In this embodiment, as shown in the attached Figure 4 As shown in , the outer edge of the upper end of the blocking part 1.3 can be chamfered to form a first guiding surface 1.31 guiding the blocking part 1.3 to be inserted upward into the insertion groove 2.2.

[0048] The notch at the lower end of the insertion slot 2.2 (more precisely, the side wall of the notch) may also be chamfered to form a second guide surface 2.21 guiding the flow blocking part 1.3 to be inserted upward into the insertion slot 2.2.

[0049] Embodiment 2:

[0050] Based on the first embodiment, in order to achieve that when the reducer is not working, the oil in the liquid containing tank 1.2 can flow back to the containing chamber a for reuse.

[0051] As attached Figure 4 As shown in the figure, in this embodiment, an oil guide hole 1.4 extending obliquely may be provided in the lower shell body 1; the upper end of the oil guide hole 1.4 extends to the bottom of the liquid containing groove 1.2, and the lower end extends to the side wall of the containing chamber a (to be precise, the lower end of the oil guide hole 1.4 extends to the groove wall of the first groove a1), so that under the action of gravity, the oil guide hole 1.4 can relatively smoothly guide the oil in the liquid containing groove 1.2 back to the containing chamber a, and the oil in the containing chamber a is not easy to enter the liquid containing groove 1.2 through the oil guide hole 1.4.

[0052] In order to ensure smooth flow guidance, the oil guide hole 1.4 is preferably a straight hole extending obliquely.

[0053] At the same time, in order to better achieve: the oil guide hole 1.4 can smoothly guide the oil in the liquid containing tank 1.2 back to the containing chamber a, while the oil in the containing chamber a is not easy to enter the liquid containing tank 1.2 through the oil guide hole 1.4.

[0054] In this embodiment, in the direction from top to bottom, it is preferred that the diameter of the oil guide hole 1.4 is gradually reduced.

[0055] Embodiment three:

[0056] Based on the first or second embodiment, in order to better perform the above-mentioned flow blocking. In this embodiment, as shown in the attached Figure 5As shown in the figure, the height dimension of the protrusion of the flow blocking part 1.3 is preferably set to be smaller than the groove depth dimension of the insertion groove 2.2, so that after the flow blocking part 1.3 is inserted into the insertion groove 2.2, the upper end of the flow blocking part 1.3 is spaced apart from the groove wall of the insertion groove 2.2; and a sealing member 4 in a compressed state is installed in the space between the upper end of the flow blocking part 1.3 and the groove wall of the insertion groove 2.2. The sealing member 4 is made of rubber or silicone, etc., and has a common elastic sealing structure.

[0057] Before the upper shell 2 is placed on the lower shell 1, the seal 4 is placed on the upper end of the flow blocking part 1.3. After the upper shell 2 is placed on the lower shell 1, the seal 4 is adapted to be placed in a compressed state between the flow blocking part 1.3 and the wall of the insertion groove 2.2 to achieve sealing and flow blocking, thereby better slowing down or even preventing the oil from flowing from the accommodating chamber a to the screw assembly 3.

[0058] Furthermore, to prevent the seal 4 from being misplaced when the upper shell 2 is placed on the lower shell 1, a receiving groove 1.32 with an upward notch is preferably provided at the upper end of the flow blocking portion 1.3, and the seal 4 is adapted to be positioned and installed in the receiving groove 1.32 so that the seal 4 can stably achieve sealing and flow blocking.

[0059] In order to make it easier to place the sealing member 4 in the insertion groove 2.2, the diameter of the groove opening of the receiving groove 1.32 is preferably set to gradually increase in the direction from bottom to top.

[0060] Embodiment 4:

[0061] Based on the first embodiment, the liquid containing tank 1.2 may be filled with oil-absorbing cotton, which can absorb the oil flowing into the liquid containing tank 1.2, thereby better preventing the oil from flowing toward the screw assembly 3 and improving the flow resistance effect.

[0062] The above is only a preferred embodiment of the utility model, and does not limit the scope of the utility model. In addition, the terms "vertical", "horizontal", "front", "rear", etc. mentioned in the embodiments of the utility model indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product is usually placed when in use, which is only for the convenience of describing the utility model 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 a limitation of the utility model. It should be further explained that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like in the description should be understood in a broad sense, for example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances. The utility model will be described in detail with reference to the drawings and in combination with the embodiments.

[0063] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A long-life automobile reducer housing, characterized in that: include: A lower shell (1) and an upper shell (2) placed on the lower shell (1), wherein an accommodating cavity (a) for accommodating a transmission structure is formed between the upper shell (2) and the lower shell (1); The overlapping portion (2.1) at the outer edge of the upper shell (2) overlaps the supporting portion (1.1) at the outer edge of the lower shell (1), and the overlapping portion (2.1) and the supporting portion (1.1) are fixedly connected via a screw assembly (3); Between the accommodating cavity (a) and the screw assembly (3), the upper end surface of the support portion (1.1) is provided with: a liquid containing groove (1.2) with an upward notch, and a flow blocking portion (1.3) protruding upward; The flow blocking portion (1.3) is inserted upwards into the insertion groove (2.2) of the overlapping portion (2.1).

2. The long-life automobile reducer housing according to claim 1, characterized in that: The lower housing (1) is provided with: an oil guide hole (1.4) extending obliquely; The upper end of the oil guide hole (1.4) extends to the bottom of the liquid containing groove (1.2), and the lower end extends to the side wall of the containing cavity (a), so that: the oil guide hole (1.4) can guide the oil in the liquid containing groove (1.2) back to the containing cavity (a).

3. The long-life automobile reducer housing according to claim 2, characterized in that: The oil guide hole (1.4) is a straight hole extending at an angle.

4. The long-life automobile reducer housing according to claim 3, characterized in that: In the direction from top to bottom, the diameter of the oil guide hole (1.4) gradually decreases.

5. A long-life automotive reducer housing according to any one of claims 1 to 4, characterized in that: The outer edge of the upper end of the flow blocking portion (1.3) is chamfered to form a first guide surface (1.31) for guiding the flow blocking portion (1.3) to be inserted upward into the insertion groove (2.2).

6. The long-life automobile reducer housing according to claim 5, characterized in that: The notch at the lower end of the insertion slot (2.2) is chamfered to form a second guide surface (2.21) that guides the flow blocking portion (1.3) to be inserted upward into the insertion slot (2.2).

7. A long-life automotive reducer housing according to any one of claims 1 to 4, characterized in that: The upper end of the flow blocking portion (1.3) is spaced apart from the wall of the insertion slot (2.2); Furthermore, a sealing member (4) in a compressed state is installed in the gap between the upper end of the flow blocking portion (1.3) and the groove wall of the insertion groove (2.2).

8. The long-life automobile reducer housing according to claim 7, characterized in that: The upper end of the flow blocking portion (1.3) is provided with: a receiving groove (1.32) with a notch facing upwards; The sealing member (4) is adapted to be installed in the accommodating groove (1.32).

9. The long-life automobile reducer housing according to claim 8, characterized in that: In the direction from bottom to top, the diameter of the slot opening of the accommodating slot (1.32) gradually increases.

10. A long-life automotive reducer housing according to any one of claims 1 to 4, characterized in that: The liquid containing tank (1.2) is filled with oil-absorbing cotton.

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