CN109698431B

CN109698431B - Gearbox and cylinder penetrating connector thereof

Info

Publication number: CN109698431B
Application number: CN201710987037.1A
Authority: CN
Inventors: 双文杰; 瞿佳; 李文涛; 徐旭初; 方伟荣
Original assignee: SAIC Motor Corp Ltd
Current assignee: SAIC Motor Corp Ltd
Priority date: 2017-10-20
Filing date: 2017-10-20
Publication date: 2020-09-29
Anticipated expiration: 2037-10-20
Also published as: CN109698431A

Abstract

The invention discloses a gearbox and a cylinder-penetrating connector thereof; the cylinder penetrating connector comprises a cylindrical shell fixed on the gearbox and a plurality of wiring terminals arranged in the cylindrical shell; a porous platform is arranged in the middle of the cylindrical shell; each wiring terminal is inserted in the porous table, one end of each wiring terminal is positioned in the gearbox, and the other end of each wiring terminal is positioned outside the gearbox; the middle part of each wiring terminal is provided with a terminal annular boss, so that oil liquid which creeps to the bottom surface of the terminal annular boss is blocked and cannot continuously move to the top end of the wiring terminal; and, wear the jar connector including the portion that compresses tightly, the portion that compresses tightly supports and presses terminal ring shape boss and compress tightly sealed the pad, makes the bottom surface of terminal ring shape boss and the top surface in close contact with of sealed pad, avoids above-mentioned by obstructed fluid to leak from the axial clearance of ring shape boss bottom surface with sealed pad top surface to effectively blocked fluid path of crawling, eliminated the inside fluid of gearbox and leaked the risk to the external world along binding post, thereby had better sealing performance.

Description

Gearbox and cylinder penetrating connector thereof

Technical Field

The invention relates to the field of electrical connectors of gearboxes, in particular to a cylinder penetrating connector for a gearbox.

Background

Through-cylinder connectors are common electrical connectors for transmissions. One end of the cylinder penetrating connector is positioned in the gearbox, and the other end of the cylinder penetrating connector extends out of the gearbox, so that electric elements in the gearbox and electric elements of an external control unit are connected with each other through a terminal of the cylinder penetrating connector. In order to avoid the oil in the gearbox from leaking outwards through the end, located inside the gearbox, of the cylinder penetrating connector, the cylinder penetrating connector is required to have good sealing performance.

In the prior art, the mode that combines together is moulded plastics and encapsulating to the sealed adoption of wearing jar connector binding post department, nevertheless because the material of binding post and plastic is different, under the adverse circumstances such as gearbox high temperature, vibration strikes, can produce the clearance because of the coefficient of expansion difference between the two, sealing performance often does not reach ideal effect. In addition, the mode of combining injection molding and glue filling is adopted, the complexity of injection molding and glue filling processes in the manufacturing process of the cylinder-penetrating connector is increased, and meanwhile, the cost is also increased.

In view of this, how to develop a through-cylinder connector with simple structure, low cost and good sealing performance is a technical problem that needs to be solved urgently by those skilled in the art.

Disclosure of Invention

In order to solve the technical problem, the invention provides a cylinder-penetrating connector which comprises a cylindrical shell fixed in a gearbox and a plurality of wiring terminals arranged in the cylindrical shell; a porous table is integrally arranged in the middle of the cylindrical shell; each wiring terminal is inserted into the porous table in a penetrating mode, one end of each wiring terminal is located in the gearbox, and the other end of each wiring terminal is located outside the gearbox; a terminal annular boss is integrally arranged in the middle of each wiring terminal; a sealing gasket is arranged between the bottom surface of each terminal annular boss and the top surface of the porous table; the cylinder penetrating connector comprises a pressing part which is pressed against the terminal annular boss; compressing the gasket.

According to the through-cylinder connector, the terminal annular boss integrated with the wiring terminal is arranged, so that oil liquid crawling to the bottom surface of the terminal annular boss is blocked and cannot continue to advance to the top end of the wiring terminal; and through setting up the sealed pad that compresses tightly in terminal ring shape boss bottom surface and porous bench face, make the bottom surface of terminal ring shape boss and the top surface in close contact with of sealed pad, form the axial seal face to avoid above-mentioned by obstructed fluid to leak from the axial clearance of ring shape boss bottom surface and sealed pad top surface, thereby effectively blocked above-mentioned fluid path of crawling, eliminated the inside fluid of gearbox and leaked the risk to the external world. The through-cylinder connector has better sealing performance, and is more reliable in sealing and lower in cost compared with injection molding and glue pouring sealing in the background technology; moreover, the structure is simple and easy to implement.

Optionally, the pressing part comprises a pressing block and a locking barrel; each wiring terminal is inserted in the pressing block in a penetrating manner; the outer wall of the locking barrel is connected with the inner wall of the cylindrical shell through threads, the locking barrel is screwed into the cylindrical shell relatively, and the locking barrel abuts against the pressing block to move towards the terminal annular boss so as to abut against the terminal annular boss.

Optionally, the sealing gasket is a whole block, and all the connecting terminals are inserted into the sealing gasket in a penetrating manner.

Optionally, one of the cylindrical shell and the locking cylinder is provided with a limiting groove, and the other is provided with a limiting protrusion; the limiting protrusion is embedded into the limiting groove; the locking cylinder is screwed in relative to the cylindrical shell, and the limiting protrusion is separated from the limiting groove along one side of the limiting groove; the locking cylinder is screwed out relative to the cylindrical shell, and the other side of the limiting groove props against the limiting protrusion, so that the limiting protrusion is limited in the limiting groove.

Optionally, an annular flange or a plurality of point-shaped protrusions distributed annularly are arranged on an end surface of the pressing block facing the locking cylinder, and the locking cylinder is pressed against the annular flange and forms line contact with the annular flange, or presses against the point-shaped protrusions to form point contact.

Optionally, the end of the locking cylinder is provided with an annular boss of the locking cylinder extending outwards, and the outer edge of the annular boss of the locking cylinder extends towards the cylindrical shell to form an annular groove surrounding the outer wall of the locking cylinder; a sealing ring is arranged in the ring groove; the top end of the cylindrical shell is embedded into the annular groove so as to compress the sealing ring.

Optionally, the inner wall of the locking cylinder extends inwards to form a pressing platform; the periphery of the compression block forms an annular step facing the locking cylinder, and the outer side wall of the annular step is matched with the inner wall of the cylindrical shell; the wall of the locking cylinder is embedded between the outer side wall of the annular step and the inner wall of the cylindrical shell, and the pressing table presses the pressing block.

Optionally, the cylindrical shell is provided with a shell annular boss and a hoop ring groove for installing a hoop; the shell wall of the gearbox shell is clamped between the annular boss of the shell and the hoop.

Optionally, at least one O-ring groove is formed between the annular boss of the housing and the hoop groove and used for installing an O-ring.

The invention further provides a gearbox, and the gearbox comprises the through cylinder connector.

Drawings

FIG. 1 is a schematic front view of one embodiment of a through-cylinder connector according to the present invention;

FIG. 2 is a schematic view showing the overall structure of the cylindrical housing shown in FIG. 1;

FIG. 3 is a schematic view of the overall construction of the locking barrel shown in FIG. 1;

FIG. 4 is a schematic view of the position of the cylinder penetrating connector self-changing gearbox shown in FIG. 1 mounted therein;

FIG. 5 is a schematic view of the position of the through-cylinder connector shown in FIG. 1 mounted externally from the transmission housing.

The reference numerals in fig. 1-5 are illustrated as follows: the sealing device comprises a cylindrical shell, a porous table, a limiting groove, a shell annular boss, a clamp annular groove, a 15O-shaped ring groove, a clamp, a wiring terminal, a terminal 21, a sealing gasket 3, a pressing block 4, an annular flange 41, a locking cylinder 5, a limiting protrusion 51, an annular boss of a locking cylinder 52, a pressing table 53 and a sealing ring 6.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, fig. 1 is a front cross-sectional view of an embodiment of a through cylinder connector according to the present invention.

The terms of orientation of the top, bottom, upper side, lower side, etc. described herein are not intended to limit the scope of the present invention based on the orientation of the through-cylinder connector shown in fig. 1. In practical application, the through-cylinder connector can present various placing angles, and at the moment, the orientation words are correspondingly adjusted adaptively.

As shown in figure 1, the cylinder penetrating connector provided by the invention comprises a cylindrical shell 1 fixed on a gearbox, wherein a porous platform 11 is arranged in the middle of the cylindrical shell 1, a plurality of jacks are arranged on the porous platform 11, and the cylindrical shell 1 is divided into an upper part and a lower part by the porous platform 11. A plurality of wiring terminals 2 are arranged in the cylindrical shell 1, each wiring terminal 2 is correspondingly inserted into each jack of the porous platform 11, one end of each wiring terminal is located inside the gearbox, and the other end of each wiring terminal is located outside the gearbox. Specifically, as shown in fig. 1, each of the terminals 2 extends in the axial direction (vertical direction in the drawing) of the cylindrical housing 1 such that the top end and the bottom end of the terminal 2 are respectively located at the upper and lower sides of the porous table 11.

At this time, the oil in the transmission case may creep from the end of the connection terminal 2 inside the transmission case to the end of the connection terminal 2 outside the transmission case along the connection terminal 2 by a capillary phenomenon.

In this embodiment, a terminal annular boss 21 is integrally provided at the middle of each of the connection terminals 2, a gasket 3 is further provided in the cylindrical housing 1, and each connection terminal 2 penetrates through the gasket 3. The cylinder-penetrating connector further comprises a pressing part which presses the terminal annular boss 21 so as to press the sealing gasket 3 relative to the porous table 11.

As described above, in the through-cylinder connector provided by the present invention, by providing the terminal annular boss 21 integrated with the connection terminal 2, the oil liquid that has climbed to the bottom surface of the terminal annular boss 21 is blocked and cannot continue to advance to the top end of the connection terminal 2, that is, the through-cylinder connector is axially sealed; moreover, by arranging the sealing gasket 3 pressed on the bottom surface of the terminal annular boss 21 and the top surface of the porous platform 11, the pressed sealing gasket 3 can reduce the oil from going to the terminal annular boss 31 along the circumferential direction to a certain extent; in addition, the bottom surface of the terminal annular boss 21 is in close contact with the top surface of the sealing gasket 3 to form radial sealing, so that the blocked oil is prevented from leaking from the axial gap between the bottom surface of the terminal annular boss 21 and the top surface of the sealing gasket 3, the axial and radial creeping path of the oil is effectively blocked, and the risk that the oil inside the gearbox leaks to the outside along the wiring terminal is eliminated as much as possible.

Therefore, the through-cylinder connector has better sealing performance, is more reliable in sealing and lower in cost compared with injection molding and glue pouring sealing in the background art, and is not easily influenced by severe environments such as high temperature and vibration; moreover, the cylinder penetrating connector provided by the invention is simple in structure and easy to implement.

Specifically, as shown in fig. 1, the sealing gasket 3 can be integrally formed into a whole, and all the connecting terminals 2 are inserted into the sealing gasket 3, so that the sealing gasket 3 is surrounded on the periphery of each connecting terminal 3, the whole arrangement is convenient for installation, and the whole sealing is more convenient for compression. Of course, it is also possible that the above-mentioned gaskets 3 are provided separately, i.e. one gasket 3 is provided around the periphery of each terminal 2.

Specifically, as shown in fig. 1, the pressing portion includes a pressing block 4 and a lock cylinder 5. Each of the terminals 2 is inserted into the holding block 4 so that the bottom surface of the holding block 4 can contact the top surface of the terminal annular boss 21. The locking cylinder 5 surrounds all the wiring terminals 2, namely, the upper ends of all the wiring terminals 2 are located in an inner cavity of the locking cylinder 5 when the position relation of the figure 1 is seen, and the outer wall of the locking cylinder 5 is connected with the inner wall of the cylindrical shell 1 through threads so as to avoid the rotation of each wiring terminal 2 relative to the cylindrical shell 1.

When the locking cylinder 5 is screwed into the cylindrical housing 1, the bottom surface of the locking cylinder 5 presses the top surface of the pressing block 4 and moves toward the terminal annular bosses 21 (downward in the figure), so that each terminal annular boss 21 presses the gasket 3.

By the arrangement mode, the rotary motion of the locking cylinder 5 is converted into the linear motion of the pressing block 4, the defect that the pressing block 4 penetrating through the wiring terminal 2 cannot rotate is overcome, and the implementation is more convenient.

Of course, other types of rotary members may be provided to effect axial movement of the holding-down blocks 4 by rotation of the rotary members. For example, the pressing block 4 may be fixed to the porous table 11 by bolts, and the pressing block 4 may be moved downward by fastening the bolts with respect to the porous table 11, so as to press the top surface of the annular boss by the pressing block 4. The pressing portion is not limited to the rotational pressing, and for example, a pressing cover that can be snap-fitted to the cylindrical housing 1 may be provided, and a pre-compressed spring may be provided between the pressing cover and the pressing block 4. Of course, the locking cylinder 5 and the pressing block 4 are combined to be pressed reliably, the pressing force is uniform, and the implementation is easy.

Further, as shown in fig. 1, the top surface of the pressing block 4 is provided with an annular flange 41, and the axial cross section of the annular flange 41 is arc-shaped, and specifically may be semicircular, so that a line contact may be formed between the bottom surface of the locking cylinder 5 and the top surface of the pressing block 4, thereby reducing friction between the pressing block 4 and the locking cylinder 5, and facilitating the rotational tightening of the locking cylinder 5. It can be known that the top surface of the pressing block 4 is provided with a plurality of point-shaped convex locking cylinders 5 which are distributed in an annular shape and form point contact with the pressing block 4, and the purpose can also be achieved.

Further, as shown in fig. 1, the top end of the locking cylinder 5 extends outwards to form a locking cylinder annular boss 52, and the outer edge of the locking cylinder annular boss 52 extends towards the top end of the cylindrical shell 1 to form an annular groove surrounding the outer wall of the locking cylinder 5. A sealing ring 6 is arranged in the ring groove, and the sealing ring 6 can be an O-shaped ring. Meanwhile, the top end of the cylindrical shell 1 is embedded into the annular groove to compress the sealing ring 6. By adopting the arrangement mode, external impurities can be prevented from entering the interior of the cylinder-penetrating connector along the gap between the top end of the locking cylinder 5 and the contact surface of the top end of the cylindrical shell 1.

Further, as shown in fig. 1, the inner wall of the lock cylinder 5 extends inward to form an abutting table 53; the outer periphery of the pressing block 4 forms an annular step facing the locking cylinder 5, and the outer side wall of the annular step is matched with the inner wall of the cylindrical shell 1, namely, the annular step is approximately in clearance fit. A gap is formed between the pressing block 4 and the inner wall of the cylindrical housing 1, as shown in fig. 1 as a space above the annular step. The locking cylinder 5 is screwed into the cylindrical shell 1, the cylinder wall of the locking cylinder 5 is embedded into the gap downwards, and the pressing table 53 presses the pressing block 4. The arrangement mode facilitates the coaxial installation between the pressing block 4 and the locking barrel 5, thereby being beneficial to uniform pressing and further optimizing the sealing effect.

Referring to fig. 2-3, fig. 2 is a schematic view of the entire structure of the cylindrical housing 1 shown in fig. 1; fig. 3 is a schematic view showing the overall structure of the lock cylinder 5 shown in fig. 1.

Further, as shown in fig. 2 to 3, one of the cylindrical housing 1 and the locking cylinder 5 is provided with a limiting groove 12, and the other is provided with a limiting protrusion 51. The locking cylinder 5 is screwed in relative to the cylindrical shell 1, and the limit protrusion 51 is embedded in the limit groove 12. When locking a section of thick bamboo 5 is when the relative tube-shape casing 1 antiport, when rotating to the back-spin tube-shape casing direction promptly, spacing arch 51 is contradicted to one side of spacing slot 12, makes spacing arch 51 be blocked in spacing slot 12 to can prevent that locking a section of thick bamboo 5 is not hard up relative tube-shape casing 1 under vibration and impact, thereby improve sealed reliability.

Meanwhile, when the locking barrel 5 needs to be screwed further, the limiting protrusion 51 is separated from the limiting groove 12 along the side wall of the other side of the limiting groove 12, so that the further screwing of the locking barrel 5 relative to the cylindrical shell 1 is not affected, and therefore one-way limiting is achieved.

As can be seen from the figure, the side wall of one side of the limiting groove 12 has a small inclination, is in smooth transition with the periphery of the cylindrical shell 1, has a guiding function, and rotates towards the side wall, so that the limiting protrusion 51 can be disengaged; the other side wall has a greater inclination and is rotated toward the side wall, the stopper projection 51 being restricted. The limiting protrusion 51 may be a semi-cylinder extending along the axial direction, so that the above one-way limiting is more easily realized.

More specifically, as shown in fig. 2-3, four of the limiting grooves 12 are uniformly distributed on the periphery of the top end of the cylindrical shell 1, and four of the limiting protrusions 51 are uniformly distributed on the outer wall of the top end ring groove of the locking cylinder 5; this arrangement is convenient for each limiting protrusion 51 to be correspondingly inserted into one limiting groove 12 after the locking cylinder 5 is screwed in place, that is, when the locking cylinder 5 is screwed into the cylindrical shell 1 for a distance sufficient to ensure that the bottom surface of the terminal annular boss 21 of the terminal 2 is in close contact with the top surface of the sealing gasket 3, so as to reduce the screwing resistance of the locking cylinder 5.

Of course, the positions of the limiting protrusion 51 and the limiting groove 12 are not limited to the above positions, and may be set on the inner wall of the cylindrical housing 1 and the outer wall of the locking cylinder 5, for example, but in comparison, the above positions are more convenient to avoid the threaded portion and are easier to implement.

Referring to fig. 1, 4-5, fig. 4 is a schematic view illustrating the position of the cylinder-penetrating connector self-transmission case installed inside; FIG. 5 is a schematic view of the position of the through-cylinder connector mounted externally from the transmission case.

Specifically, as shown in fig. 1, the cylindrical housing 1 is provided with a housing annular boss 13 and a clamp ring groove 14 for mounting a clamp 16; the shell wall of the gearbox shell is clamped between the annular boss 13 of the shell and the clamp 16.

As shown in fig. 4, the annular boss 13 of the housing is clamped on the inner wall of the transmission case, the clamp 16 is clamped on the outer wall of the transmission case, and at the moment, the cylinder-penetrating connector is installed from the inside of the transmission case; alternatively, as shown in fig. 5, the annular boss 13 of the housing is engaged with the outer wall of the transmission case wall, and the clamp 16 is engaged with the inner wall of the transmission case wall, and at this time, the cylinder insertion connector is inserted from the outside of the transmission case.

The arrangement mode can avoid the cylinder penetrating connector from dropping off from the shell wall of the gearbox shell, is convenient for installing the cylinder penetrating connector, and can freely select the mode of inside installation or outside installation, so that the cylinder penetrating connector is more flexibly installed and fixed.

Furthermore, as shown in fig. 1, at least one O-ring groove 15 may be further disposed between the hoop groove 14 and the casing annular boss 13 for installing an O-ring to seal the cylindrical casing 1 and the transmission casing. Specifically, two O-ring grooves 15 may be provided to enhance the sealing effect.

In addition, the invention also provides a gearbox, which comprises the cylinder penetrating connector, and accordingly has the same technical effects as the above embodiment, and the details are not repeated herein.

The gearbox and the through-cylinder connector thereof provided by the invention are described in detail above. The principles and embodiments of the present invention are described herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. A cylinder penetrating connector comprises a cylindrical shell (1) fixed on a gearbox and a plurality of wiring terminals (2) arranged in the cylindrical shell (1); a porous table (11) is arranged in the middle of the cylindrical shell (1); each wiring terminal (2) is inserted into the porous table (11), one end of each wiring terminal is positioned in the gearbox, and the other end of each wiring terminal is positioned outside the gearbox, and the multi-hole transmission device is characterized in that a terminal annular boss (21) is arranged in the middle of each wiring terminal (2); a sealing gasket (3) is arranged between the terminal annular boss (21) and the porous platform (11); the cylinder penetrating connector comprises a pressing part which is pressed against the terminal annular boss (21) to press the sealing gasket (3);

the pressing part comprises a pressing block (4) and a locking cylinder (5); each wiring terminal (2) is inserted into the pressing block (4); the outer wall of the locking cylinder (5) is connected with the inner wall of the cylindrical shell (1) through threads, the locking cylinder (5) is screwed into the cylindrical shell (1), and the locking cylinder (5) presses the pressing block (4) to move towards the terminal annular boss (21) so as to press the terminal annular boss (21).

2. A cylinder connector according to claim 1, wherein the gasket (3) is in one piece and all the terminals (21) are inserted through the gasket (3).

3. A through-cylinder connector according to claim 1, wherein the cylindrical housing (1) and the lock cylinder (5) are provided with a limit groove (12) on one and a limit projection (51) on the other; the limiting protrusion (51) is embedded into the limiting groove (12); the locking cylinder (5) is screwed in relative to the cylindrical shell (1), and the limiting protrusion (51) is separated from the limiting groove (12) along one side of the limiting groove (12); the locking cylinder (5) is screwed out relative to the cylindrical shell (1), and the other side of the limiting groove (12) abuts against the limiting protrusion (51) so that the limiting protrusion is limited in the limiting groove (12).

4. A cylinder connector assembly according to claim 1, wherein the end surface of the compression block (4) facing the locking cylinder (5) is provided with an annular flange (41) or a plurality of point-shaped protrusions distributed annularly; the locking cylinder (5) is pressed against the annular flange (41) and forms line contact with the annular flange (41), or presses against the point-shaped bulges to form point contact.

5. A through-cylinder connector according to claim 1, wherein the end of the locking cylinder (5) is provided with an outwardly extending locking cylinder annular projection (52), and the outer edge of the locking cylinder annular projection (52) extends towards the cylindrical shell (1) to form an annular groove surrounding the outer wall of the locking cylinder (5); a sealing ring (6) is arranged in the ring groove; the top end of the cylindrical shell (1) is embedded into the annular groove to compress the sealing ring (6).

6. A through-cylinder connector according to claim 1, wherein the inner wall of the locking cylinder (5) extends inwardly to form a abutment (53); the periphery of the compression block (4) forms an annular step facing the locking cylinder (5), and the outer side wall of the annular step is matched with the inner wall of the cylindrical shell (1); the wall of the locking cylinder (5) is embedded between the outer side wall of the annular step and the inner wall of the cylindrical shell (1), and the pressing table (53) presses the pressing block (4).

7. A through-cylinder connector according to any one of claims 1-6, wherein the cylindrical housing (1) is provided with a housing annular projection (13) and a clip ring groove (14) for mounting a clip (16); the shell wall of the gearbox shell is clamped between the annular boss (13) of the shell and the clamp (16).

8. A through-cylinder connector according to claim 7, wherein at least one O-ring groove (15) is provided between the housing annular projection (13) and the clip ring groove (14) for mounting an O-ring.

9. A gearbox comprising a through-cylinder connector according to any one of claims 1 to 8.