A high-reliability gear shifter core device

Abstract

This invention discloses a core structure for a highly reliable electronic gear shifter, including a bracket, side plates, a toothed plate, and a shifting assembly. The shifting assembly includes a left shift block, a shift lever, a right shift block, steel balls, a locking plate, a locking spring, a gear position spring, and a sleeve. The shift lever is clamped and fixed by the left and right shift blocks. The cylindrical boss of the left shift block is tightly fitted with the inner hole of the large bearing, and the pin hole of the right shift block is tightly fitted with a pin, which is also tightly fitted with the inner hole of the small bearing. The locking spring and locking plate slide within the inner cavities of the left and right shift blocks, the steel balls and gear position spring move within the inner hole of the sleeve, and the steel balls and locking plates are slidably connected to the toothed plate. The unlocking lever slides within the shift lever. This invention enhances the shifting operation feel, increases the service life of the gear shifter, improves the strength and structural reliability of the gear shifter, and the locking function avoids the risk of misoperation.

Description

Technical Field

[0001] This invention relates to the field of automotive gear shift technology, and more specifically to a core device for a highly reliable electronic gear shifter. Background Technology

[0002] With the upgrading of transmissions, electronic gear shifters are becoming increasingly popular, with a rapid increase in demand for civilian and military engineering vehicles, such as mining trucks, dump trucks, dock unloading trucks, and special military transport vehicles. Because engineering vehicles require frequent gear shifting and operate in harsh environments, while electronic gear shifters used in passenger cars typically have a lifespan of 200,000 shift cycles and a static strength requirement of less than or equal to 300N, there is a need to design an electronic gear shifter with a long lifespan and high strength that can meet the demands of harsh environments. Summary of the Invention

[0003] To address the technical problem of electronic gear shifter malfunction caused by frequent gear changes in harsh environments in existing civilian and military engineering vehicles, this invention provides a highly reliable core device for an electronic gear shifter.

[0004] The technical solution adopted in this invention is:

[0005] A core device for a highly reliable electronic gear shifter includes a bracket, a side plate, a toothed plate, and a shifting assembly; the shifting assembly includes a left shift block, a shift lever, a right shift block, a steel ball, a locking plate, a locking spring, a gear position spring, and a sleeve.

[0006] The bracket is a hollow frame consisting of a left side plate, a right side plate, and a top plate. The top of the bracket has an opening that communicates with the bracket cavity. The side plates and toothed plates are detachably connected to the left side plate and the right side plate, respectively. The toothed plates are used to lock the locking plates in different positions and support the steel balls.

[0007] The left shift block is rotatably mounted on the left side of the center of the bracket cavity, and the right shift block is rotatably mounted on the right side of the center of the bracket cavity. The left and right shift blocks are fastened together by screws. The shift lever is clamped between the left and right shift blocks, and its upper end extends out from the opening at the top of the bracket.

[0008] The left and right shift blocks have cavities that communicate with the cylindrical holes surrounding the shift lever. A locking spring is installed in the cavity. A locking plate is slidably disposed between the right shift block and the toothed plate. One end of the locking plate extends into the cavity and abuts against the locking spring. The other end of the locking spring abuts against the bottom of the cavity. The other end of the locking plate slides in contact with the teeth of the toothed plate.

[0009] The sleeve is installed between the left and right shift blocks. The shift spring is assembled inside the sleeve. One end of the shift spring passes through the sleeve and abuts against the left shift block, while the other end passes through the sleeve to support the steel ball. The steel ball is pressed and installed between the shift spring and the toothed plate.

[0010] Furthermore, the toothed plate has a limiting groove on its toothed shape, which is used to lock the locking piece in different positions. The shift lever has an unlocking lever, the lower end of which extends out from the shift lever and contacts the top surface of the end of the locking piece that extends into the cavity.

[0011] Furthermore, the right side of the bracket is provided with a small bearing mounting hole, in which a small bearing is installed; the side plate is provided with a large bearing mounting hole, in which a large bearing is installed; the center lines of the small bearing mounting hole and the large bearing mounting hole are aligned. The left shift block is rotatably mounted on the left side of the center of the bracket cavity via a cylindrical protrusion at its bottom, the cylindrical protrusion being inserted into the inner hole of the large bearing; the right shift block is rotatably mounted on the right side of the center of the bracket cavity via a pin passing through its bottom, the pin being inserted into the inner hole of the small bearing.

[0012] Furthermore, the center of the toothed plate is provided with an arc-shaped notch, the bottom surface of which is provided with several teeth that are adapted to the locking plate, and one side of the toothed plate is provided with hemispherical holes that correspond one-to-one with the teeth for supporting the steel balls.

[0013] Furthermore, the bottom of the hemispherical hole is provided with a cylindrical through hole that is concentrically connected to the hemispherical hole.

[0014] Furthermore, the center of the left shift block is provided with a first semi-cylindrical hole and a first locking plate limiting groove from top to bottom, and the center of the right shift block is provided with a second semi-cylindrical hole and a second locking plate limiting groove from top to bottom. The bottom of the second locking plate limiting groove is provided with a rectangular through hole. After the left shift block and the right shift block are fastened together, the first semi-cylindrical hole and the second semi-cylindrical hole are combined to form a cylindrical hole for surrounding the shift lever, and the first locking plate limiting groove and the second locking plate limiting groove are combined to form a cavity for accommodating the locking spring and the locking plate.

[0015] Furthermore, the locking plate is T-shaped, including a vertical arm and a horizontal arm. The vertical arm is slidably disposed between the right shift block and the toothed plate. The upper end of the vertical arm contacts the toothed plate. The horizontal arm can be movably inserted through the rectangular through hole into the cavity formed by the left shift block and the right shift block, and its upper and lower end faces abut against the unlocking rod and the locking spring, respectively.

[0016] Furthermore, the center of the bottom surface of the horizontal arm protrudes vertically downward to form a protrusion for supporting the locking spring.

[0017] Furthermore, the left shift block has a first sleeve mounting hole, which is a countersunk hole; the right shift block has a second sleeve mounting hole, which is a through hole; one end of the sleeve protrudes radially outward to form a head, the sleeve head is fitted into the first sleeve mounting hole, and the sleeve tail is fitted into the second sleeve mounting hole.

[0018] Furthermore, the bracket, side plates, toothed plates, and shift assembly are all made of metal.

[0019] The beneficial effects of this invention are:

[0020] 1. This invention uses a shift lever, a shift spring, a locking spring, a steel ball, a locking plate, and a toothed plate to perform shifting and locking, and uses an unlocking lever, a locking spring, and a locking plate to perform unlocking, thereby reducing friction between the parts during shifting and unlocking and greatly improving the service life of the shifter.

[0021] 2. The shifting assembly of this invention is rotatably connected to the side plate and bracket via large and small bearings, allowing for flexible shifting operation; the shifting position uses a shifting spring and steel balls, improving the operating feel. The structural design of the shifting assembly allows the amount of shaking after assembly to be controlled within a certain range, avoiding structural and functional failure due to prolonged shifting operations and improving shifting reliability.

[0022] 3. The core components of the electronic shifter of this invention are made of metal materials, making it easier to control the size and surface roughness of the mating parts, and making it more adaptable to harsh environments. Compared with existing electronic shifters, the locking structure parts have higher hardness, which improves the strength of use and increases reliability. Attached Figure Description

[0023] Figure 1 This is an exploded structural diagram of the core device of the high-reliability gear shifter of the present invention.

[0024] Figure 2 This is a schematic diagram of the assembly structure of the core device of the high-reliability shifter of the present invention. Figure 1 .

[0025] Figure 3 This is a schematic diagram of the assembly structure of the core device of the high-reliability shifter of the present invention. Figure 2 .

[0026] Figure 4 This is a structural schematic diagram of the support frame for the core device of the high-reliability shifter of the present invention.

[0027] Figure 5 This is a schematic diagram of the side plate of the core device of the high-reliability shifter of the present invention.

[0028] Figure 6 This is a schematic diagram of the toothed plate of the core device of the high-reliability shifter of the present invention.

[0029] Figure 7 This is a schematic diagram of the structure of the left shift block of the core device of the high-reliability shifter of the present invention.

[0030] Figure 8This is a schematic diagram of the right shift block of the core device of the high-reliability shifter of the present invention.

[0031] Figure 9 This is a schematic diagram of the locking plate of the core device of the high-reliability shifter of the present invention. Detailed Implementation

[0032] To better understand the present invention, the following embodiments further illustrate the content of the present invention, but the content of the present invention is not limited to the following embodiments.

[0033] See Figures 1-9 This example provides a core structure for a highly reliable electronic gear shifter, including a side plate 1, a bracket 8, and a shift assembly made of metal. The shift assembly includes a left shift block 3, an unlocking lever 4, a shift lever 5, a right shift block 6, a toothed plate 7, a steel ball 10, a locking plate 11, a locking spring 12, a gear position spring 13, a pin 14, and a sleeve 15.

[0034] The bracket 8 is a hollow frame composed of a left side plate, a right side plate, and a top plate. The lower ends of the left and right side plates are connected by two support columns, each with threaded holes. The upper ends of the left and right side plates also have corresponding threaded holes. These four threaded holes are used to install the bracket 8. The top plate has an elongated upper opening communicating with the bracket cavity. The lower part of the left side plate has a downward-facing U-shaped groove, and the upper part of the left side plate has a first threaded hole 82 and a second threaded hole 83. The lower part of the right side plate has a small bearing mounting hole 81, which is a stepped through hole with a limiting step. The upper part of the right side plate has a third threaded hole 84 and a fourth threaded hole 85. The small bearing 9 is press-fitted into the small bearing mounting hole 81 of the bracket 8, with the flange face of the small bearing 9 contacting the stepped surface of the small bearing mounting hole 81.

[0035] The upper middle part of side plate 1 is provided with a large bearing mounting hole 101, which is a through hole with a limiting step. The upper part of side plate 1 is provided with a first side plate mounting hole 102 and a second side plate mounting hole 103, which are located above the large bearing mounting hole 101 and are symmetrically distributed. The large bearing 2 is press-fitted into the large bearing mounting hole 101 of side plate 1.

[0036] The upper part of the side plate 1 is inserted into the bracket cavity and is fixedly mounted on the inner side of the left side plate of the bracket by a first screw passing through the first side plate mounting hole 102 and the first screw hole 82, and a second screw passing through the second side plate mounting hole 103 and the second threaded hole 83.

[0037] The toothed plate 7 has a circular arc notch at its center, and a series of teeth 72 are continuously arranged on the bottom surface of the circular arc notch. One side of the toothed plate 7 has a series of hemispherical holes 71 evenly distributed on the same circumference, each corresponding to one of the teeth 72. The bottom of each hemispherical hole 71 has a cylindrical through hole concentrically connected to it. The center of the circumference of the hemispherical holes 71 is concentric with the center of the circular arc notch. The toothed plate 7 has a first toothed plate mounting hole 73 and a second toothed plate mounting hole 74 on both sides. The locking teeth 72 on the toothed plate 7 can be designed according to the actual locking position required. Positions requiring locking are designed with rectangular limits, while positions not requiring locking are designed with a sawtooth shape.

[0038] The toothed plate 7 with its arc notch facing downwards is inserted into the cavity of the bracket and fixed to the inner side of the right side plate of the bracket by a fourth screw passing through the first toothed plate mounting hole 73 and the fourth threaded hole 85, and a third screw passing through the second toothed plate mounting hole 74 and the third threaded hole 84.

[0039] The center of the left shift block 3 is provided with a semi-cylindrical hole 32 adapted to the shape of the shift lever 4 and a first locking plate limiting groove 37 from top to bottom. A cylindrical boss 33 is provided on the outer bottom of the left shift block 3. A stepped through hole is provided below the first locking plate limiting groove 37. The large hole of the stepped through hole is located on the inner side of the shift block, and the small hole of the stepped through hole axially penetrates the center of the cylindrical boss 33. The left shift block 3 is provided with a first stop block mounting hole 34, a second stop block mounting hole 35, a third stop block mounting hole 36 and a first sleeve mounting hole 31 around its perimeter. The first sleeve mounting hole 31 is a countersunk hole and is located on the upper part of the left shift block 3.

[0040] The right shift block 6 has a semi-cylindrical hole 62 and a second locking plate limiting groove 64 arranged sequentially from top to bottom at its center, which are adapted to the shape of the shift lever 4. The bottom of the right shift block 6 has a pin mounting hole 65, the center line of which is collinear with the center line of the cylindrical boss 33. The bottom of the second locking plate limiting groove 64 has a rectangular through hole 63. The right shift block 6 has a fourth stop mounting hole 66, a fifth stop mounting hole 67, a sixth stop mounting hole 68, and a second sleeve mounting hole 61 around its perimeter, which correspond one-to-one with the first stop mounting hole 34, the second stop mounting hole 35, the third stop mounting hole 36, and the first sleeve mounting hole 31 of the left shift block 3. The second sleeve mounting hole 61 is a through hole and is located on the upper part of the right shift block 6.

[0041] The left shift block 3 and the right shift block 6 are locked and fixedly connected by a first screw and nut passing through the first shift block mounting hole 34 and the fourth shift block mounting hole 66, a second screw and nut passing through the second shift block mounting hole 35 and the fifth shift block mounting hole 67, and a third screw and nut passing through the third shift block mounting hole 36 and the sixth shift block mounting hole 68. The knurled part of the shift lever 4 is clamped through the semi-cylindrical hole 32 of the left shift block and the semi-cylindrical hole 62 of the right shift block. The first locking plate limiting groove 37 and the second locking plate limiting groove 64 form a cylindrical cavity. The cylindrical boss 33 on the left shift block 3 is interference-fitted with the inner hole of the large bearing 2. The head of the pin 14 passes through the inner hole of the small bearing 9 and the pin mounting hole 65 on the right shift block 6, and is rotatably accommodated in the large hole of the stepped through hole at the bottom of the left shift block 3. The pin 14 is interference-fitted with the inner hole of the small bearing 9 and the pin mounting hole 65.

[0042] The locking plate 11 is T-shaped, including a vertical arm 114 and a horizontal arm 113 vertically connected to the middle of the vertical arm. The upper end of the vertical arm 114 is adapted to the tooth 72 of the toothed plate 7. The center of the bottom surface 112 of the horizontal arm 113 protrudes vertically downward to form a protrusion 111. The vertical arm 114 of the locking plate 11 is accommodated in the cavity between the right shift block 6 and the toothed plate 7, and the upper end of the vertical arm 114 contacts the tooth 72 of the toothed plate 7. The horizontal arm 113 of the locking plate 11 is inserted into the cylindrical cavity formed by the engagement of the first locking plate limiting groove 37 and the second locking plate limiting groove 63 through the rectangular through hole 63. One end of the locking spring 12 is guided and supported on the bottom surface 112 of the locking plate by the protrusion 111 of the locking plate 11, and the other end of the locking spring 12 is supported on the bottom surface of the cylindrical cavity formed by the engagement of the first locking plate limiting groove 37 and the second locking plate limiting groove 63. The unlocking lever 4 is inserted into the through hole of the shift lever 5, and the bottom surface of the unlocking lever 4 contacts the top surface of the horizontal arm 113 of the locking plate 11.

[0043] One end of the sleeve 15 protrudes radially outward to form a head, which is fitted into the first sleeve mounting hole 31, and the tail end of the sleeve is fitted into the second sleeve mounting hole 61. The stop spring 13 is assembled in the cavity of the sleeve 15, with one end of the stop spring 13 abutting against the bottom of the first sleeve mounting hole 31 of the left shift block 3. The steel ball 10 is supported on the other end of the stop spring 13 and is pressed between the stop spring 13 and the hemispherical hole 71 of the toothed plate 11.

[0044] The working principle of this invention is:

[0045] During gear shifting, the gear shift lever 5 drives the gear shift assembly to rotate around the center line connecting the small bearing and the large bearing 9. During the rotation, the upper end of the vertical arm 114 of the locking plate 11 slides from one tooth 72 of the toothed plate 7 to another tooth 72 under the action of the gear shift spring 13 to achieve gear shifting. At the same time, the steel ball 10 slides from one hemispherical hole 71 to another hemispherical hole 71 under the action of the gear shift spring 13.

[0046] During gear shifting, the locking plate 11 engages with the toothed plate 72 on the toothed plate 7 to lock the gear. The locking plate 11 is limited by the locking plate groove on the right shift block 6. When unlocking, the unlocking lever 4 is pressed down, and the downward pressure of the unlocking lever is transmitted to the locking plate 11, causing the locking plate 11 to slide down. The vertical arm 114 of the locking plate 11 disengages from the toothed plate 72, completing the unlocking action.

[0047] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also within the protection scope of the present invention.

Claims

1. A high-reliability electronic shifter core device, characterized by, It includes a bracket (8), a side plate (1), a toothed plate (7), and a shift assembly; the shift assembly includes a left shift block (3), a shift lever (5), a right shift block (6), a steel ball (10), a locking plate (11), a locking spring (12), a gear spring (13), and a sleeve (15); The bracket (8) is a hollow frame consisting of a left side plate, a right side plate and a top plate. The top of the bracket (8) has an upper opening that communicates with the cavity of the bracket. The side plate (1) and the toothed plate (7) are detachably connected to the left side plate and the right side plate, respectively. The toothed plate (7) is used to lock the locking piece (11) in different positions and support the steel ball (10). The left shift block (3) is rotatably installed on the left side of the center of the bracket cavity, and the right shift block (6) is rotatably installed on the right side of the center of the bracket cavity. The left shift block (3) and the right shift block (6) are fastened together by screws. The shift lever (5) is clamped between the left shift block (3) and the right shift block (6), and its upper end extends out from the top opening of the bracket (8). The left shift block (3) and the right shift block (6) are provided with cavities that communicate with the cylindrical holes surrounding the shift lever (5). A locking spring (12) is provided in the cavity. A locking piece (11) is slidably disposed between the right shift block (6) and the toothed plate (7). One end of the locking piece (11) extends into the cavity and abuts against the locking spring (12). The other end of the locking spring (12) abuts against the bottom of the cavity. The other end of the locking piece (11) slides in contact with the teeth of the toothed plate (7). The sleeve (15) is installed between the left shift block (3) and the right shift block (6). The shift spring (13) is assembled inside the sleeve (15). One end of the shift spring (13) passes through the sleeve (15) and abuts against the left shift block (3). The other end passes through the sleeve (15) and supports the steel ball (10). The steel ball (10) is pressed and installed between the shift spring (13) and the toothed plate (7). The right side of the bracket (8) is provided with a small bearing mounting hole, in which a small bearing (9) is installed. The side plate (1) is provided with a large bearing mounting hole, in which a large bearing (2) is installed. The center line connecting the small bearing mounting hole and the large bearing mounting hole is a straight line. The left shift block (3) is rotatably installed on the left side of the center of the bracket cavity through a cylindrical protrusion at its bottom. The cylindrical protrusion is inserted into the inner hole of the large bearing (2). The right shift block (6) is rotatably installed on the right side of the center of the bracket cavity through a pin (14) passing through its bottom. The pin (14) is inserted into the inner hole of the small bearing (9).

2. A high reliability electronic shifter core device according to claim 1, wherein, The toothed plate (7) has a limiting groove on its toothed shape. The limiting groove is used to lock the locking piece (11) in different positions. The shift lever (5) has an unlocking lever (4). The lower end of the unlocking lever (4) extends from the shift lever (5) and contacts the top surface of the end of the locking piece (11) that extends into the cavity.

3. A high reliability electronic shifter core device according to claim 1 or 2, characterized in that, The center of the toothed plate (7) is provided with an arc notch, and the bottom surface of the arc notch is provided with several teeth (72) that are adapted to the locking plate (11). One side of the toothed plate (7) is provided with a hemispherical hole (71) that corresponds to the teeth (72) to support the steel ball (10).

4. A high reliability electronic shifter core device according to claim 3, wherein, The bottom of the hemispherical hole (71) is provided with a cylindrical through hole that is concentrically connected to the hemispherical hole (71).

5. A high reliability electronic shifter core device according to claim 2, wherein, The center of the left shift block (3) is provided with a first semi-cylindrical hole (32) and a first locking plate limiting groove (37) from top to bottom. The center of the right shift block (6) is provided with a second semi-cylindrical hole (62) and a second locking plate limiting groove (64) from top to bottom. The bottom of the second locking plate limiting groove (64) is provided with a rectangular through hole (63). After the left shift block (3) and the right shift block (6) are fastened together, the first semi-cylindrical hole (32) and the second semi-cylindrical hole (62) are combined to form a cylindrical hole for surrounding the shift lever (5), and the first locking plate limiting groove (37) and the second locking plate limiting groove (64) are combined to form a cavity for accommodating the locking spring (12) and the locking plate (11).

6. The core device of a high-reliability electronic gear shifter according to claim 5, characterized in that, The locking plate (11) is T-shaped and includes a vertical arm and a horizontal arm. The vertical arm is slidably disposed between the right shift block (6) and the toothed plate (7). The upper end of the vertical arm contacts the toothed plate (72). The horizontal arm can be movably inserted through the rectangular through hole (63) into the cavity formed by the left shift block (3) and the right shift block (6), and its upper and lower end faces abut against the unlocking rod (4) and the locking spring (12) respectively.

7. The core device of a high-reliability electronic gear shifter according to claim 6, characterized in that, The center of the bottom surface of the horizontal arm protrudes vertically downward to form a protrusion for supporting the locking spring (12).

8. A high-reliability electronic shifter core device according to claim 1 or 2, characterized in that, The left shift block (3) is provided with a first sleeve mounting hole (31), which is a countersunk hole; the right shift block (6) is provided with a second sleeve mounting hole (61), which is a through hole; one end of the sleeve (15) protrudes radially outward to form a head, the sleeve head is fitted into the first sleeve mounting hole (31), and the sleeve tail is fitted into the second sleeve mounting hole (61).

9. A high-reliability electronic gear shifter core device according to claim 1 or 2, characterized in that, The bracket (8), side plate (1), toothed plate (7) and shift assembly are all made of metal.

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