Control mechanism and control assembly suitable for 9-gear transmission and with gear locking function

Abstract

The utility model discloses a control mechanism and a control assembly which are suitable for a 9-gear transmission and have a gear locking function, and solves the problem that in an upper cover gear locking structure in a single H gas circuit of the existing 9-gear transmission, when a reversing function cannot be used, judgment of an operator on a currently used gear is disordered. The limiting device is provided with a telescopic end, the telescopic end retracts to an initial position and extends to a stop position, and the fixed end of the limiting device is arranged on a shell of the control mechanism; a limiting boss is arranged on the outer circumferential wall of the gear engaging shifting block and located on the side opposite to the groove, the side, close to the gear engaging arm, of the limiting boss is a limiting face, and when the gear engaging shifting block is located at the neutral gear, the limiting face corresponds to the side wall of the end of the telescopic end. The height of the limiting face in the radial direction is H, when the telescopic end is located at the initial position, the distance between the end portion of the telescopic end and the peripheral wall of the gear engaging shifting block is L0, when the telescopic end is located at the stop position, the distance between the end portion of the telescopic end and the peripheral wall of the gear engaging shifting block is L1, and H is larger than L1 and smaller than L0.

Description

Technical Field

[0001] This utility model relates to a gear locking structure for a transmission, specifically to a control mechanism and control assembly suitable for a 9-speed transmission and having a gear locking function. Background Technology

[0002] In a 9-speed transmission with an overdrive gear, there are typically a main gearbox and an auxiliary gearbox. The auxiliary gearbox controls high and low speeds, while the main gearbox has different gear ratios. With the cooperation of the main and auxiliary gearboxes, two reverse gears with different speed ratios can be achieved. The operating system of this type of transmission can be divided into single-H and double-H types. Due to the inherent gear-shifting structure of the double-H air circuit, one shift position corresponds to one gear, so there is no need to lock the gears. However, in a single-H air circuit, one shift position corresponds to both high and low gears, requiring the high-gear reverse gear position to be locked to prevent the user from engaging it. In this case, there are nine forward gears.

[0003] Existing single-H air circuits use a cover-mounted locking mechanism. Its principle is as follows: when the transmission shifts to a higher gear, a locking cylinder mounted on the transmission cover operates. A pin in the cylinder extends and inserts into the reverse shift fork shaft, preventing gear engagement. For example, Chinese utility model patent CN202402616U relates to a similar single-H air circuit cover-mounted locking structure, disclosing a locking structure for the overdrive transmission master case. This structure includes a locking assembly located inside the transmission cover and adapted to the shift fork for locking or disengaging the shift fork shaft. The locking assembly includes a locking piston adapted to the shift fork shaft and a cylinder (i.e., a locking cylinder) for the piston's movement. The locking piston is connected to a locking air pipe, which is located within the control housing. By locking or disengaging the shift fork shaft using the locking assembly, reverse gear locking in the high-gear range is achieved.

[0004] This type of locking mechanism requires a locking cylinder mounted on the transmission cover. The locking cylinder pushes a locking piston, which inserts into the shift fork shaft (reverse / climb shift fork shaft) to restrict its movement and lock the gear. However, the transmission's reversing mechanism relies on the reverse shift fork shaft for its reversing function. If the transmission shifts to a higher gear, the reverse shift fork shaft will be locked by the locking mechanism, rendering the reversing function unusable. While this doesn't affect the normal operation of the transmission, the gear sequence fed back to the driver differs from the operator's preferred sequence, potentially affecting the operator's judgment of the currently used gear and leading to a safety hazard. Utility Model Content

[0005] The purpose of this invention is to solve the problem that in the existing single-H air circuit of a 9-speed transmission, the upper cover locking structure prevents the reverse gear shift fork shaft from being locked when the transmission is switched to a higher gear, thus making the reversing function of the reversing mechanism unusable. This may easily cause confusion for the operator in judging the current gear position and lead to safety accidents. The invention provides a control mechanism and control assembly suitable for 9-speed transmissions and equipped with a locking function.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A control mechanism for a 9-speed transmission with a locking function includes a lateral shift lever, the input end of which is connected to a shift arm via a spline. A shift lever is fixedly connected to the outer peripheral wall near its output end. A groove is formed on the outer peripheral wall of the shift lever, and a gear selector is engaged within the groove. The gear selector drives the shift lever and the lateral shift lever to move axially for gear selection. The shift arm drives the lateral shift lever and the shift lever to rotate, thereby causing the shift fork and shift fork shaft on the transmission cover to move axially for gear engagement. The key feature is that the control mechanism for a 9-speed transmission with a locking function also includes a limiting device. The limiting device has a telescopic end, which retracts to the initial position and extends to the gear position. The fixed end of the limiting device is fixedly connected to the housing of the control mechanism.

[0008] A limiting boss is provided on the outer peripheral wall of the shift lever, on the opposite side of the groove. The side of the limiting boss closest to the shift arm is the limiting surface. The setting position of the limiting boss meets the following conditions: when the shift lever is in neutral, the limiting surface corresponds to the end side wall of the telescopic end; defined as: the radial height of the limiting surface is H; when the telescopic end is in the initial position, the distance between the end of the telescopic end and the outer peripheral wall of the shift lever is L0; when the telescopic end is in the stop position, the distance between the end of the telescopic end and the outer peripheral wall of the shift lever is L1. Then: L1 < H < L0.

[0009] Furthermore, the limiting boss is an annular boss that is set around the outer wall of the shift lever, and the two outer end faces of the boss in the circumferential direction are parallel to the midpoint of the boss in the circumferential direction passing through the central axis.

[0010] Furthermore, let's define: if the distance between the two outer end faces of the boss in the circumferential direction is D, then 12mm ≤ D ≤ 18mm.

[0011] Furthermore, D is set to 15mm.

[0012] Furthermore, the limiting device is a locking cylinder, and the working end of the locking cylinder is the telescopic end of the limiting device.

[0013] Furthermore, the locking cylinder is connected to an air source, and the working end of the locking cylinder is controlled to extend and retract by controlling the on / off state of the air source.

[0014] Furthermore, the side of the telescopic end closest to the limiting surface has a planar structure.

[0015] This utility model also provides a control assembly suitable for a 9-speed transmission and having a gear locking function, which is characterized in that it includes the above-mentioned control mechanism suitable for a 9-speed transmission and having a gear locking function.

[0016] The advantages of this utility model compared to the prior art are:

[0017] 1. This utility model relates to a control mechanism for a 9-speed transmission with a locking function. A limiting boss is provided on the outer peripheral wall of the shift lever, and a limiting device is provided to match it. When the telescopic end of the limiting device is in the stop position, it prevents the shift lever and the lateral shift lever from moving in the reverse gear direction, thus achieving the purpose of locking the gear. This satisfies the locking requirements of a single H-circuit air passage without affecting the movement of the shift fork shaft in the transmission cover, ensuring the proper functioning of the reversing structure and guaranteeing a reasonable gear sequence.

[0018] 2. The operating mechanism of this utility model, which is applicable to a 9-speed transmission and has a locking function, uses a locking cylinder for limit control. It has a simple structure, low production cost, and is easy to operate.

[0019] 3. The control assembly of this utility model, which is applicable to a 9-speed transmission and has a gear locking function, has a simple structure, is easy to operate, and has a gear locking function. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment of the operating mechanism of this utility model applicable to a 9-speed transmission and having a gear locking function.

[0021] The annotations in the attached figures are explained as follows:

[0022] 1. Horizontal shift lever; 2. Gear selector; 3. Gear shift arm; 4. Gear lock cylinder; 5. Gear shifter. Detailed Implementation

[0023] To make the objectives, advantages and features of this utility model clearer, the following describes in detail, with reference to the accompanying drawings and specific embodiments, a control mechanism and control assembly suitable for a 9-speed transmission and having a gear locking function.

[0024] like Figure 1As shown, this utility model addresses the problem in the existing 9-speed transmission single-H air circuit upper cover locking structure where, when the transmission shifts to a higher gear, the reverse gear fork shaft is locked, rendering the reversing mechanism unusable. This causes a discrepancy between the gear sequence fed back to the driver and the operator's preferred gear sequence, potentially affecting the operator's judgment of the currently used gear and leading to safety accidents. The invention provides a control mechanism suitable for 9-speed transmissions with a locking function. This mechanism includes a transverse shift lever 1, whose input end is connected to a shift arm 3 via a spline. A shift paddle 5 is fixedly connected to the outer peripheral wall of the transverse shift lever 1 near its output end via a pin. A groove is formed on the outer peripheral wall of the shift paddle 5, and a gear selector 2 is engaged within the groove.

[0025] The initial position of the horizontal shift lever 1 is first or second gear (i.e., as shown in the image). Figure 1 (As shown in the image), moving the transverse shift lever 1 to the left along its axis engages third and fourth gears, while moving it to the right engages reverse gear. Rotating the gear selector 2 drives the shift lever 5 and the transverse shift lever 1 to move left and right for gear selection. Rotating the shift arm 3 drives the transverse shift lever 1 and the shift lever 5 to rotate, which in turn moves the shift fork and shift fork shaft on the transmission cover along their axial direction for gear engagement.

[0026] The operating mechanism for a 9-speed transmission with a locking function also includes a locking cylinder 4. The locking cylinder 4 has a working end (i.e., a telescopic end). The working end retracts to the initial position and extends to the deceleration position. Figure 1 The gear position is shown below.

[0027] On the outer peripheral wall of the shift lever 5, and on the opposite side of the groove, there is a circular boss surrounding the outer peripheral wall of the shift lever 5. The two outer end faces of the boss in the circumferential direction are parallel to the midpoint of the boss in the circumferential direction through the central axis. Defined as D, the distance between the two outer end faces of the boss in the circumferential direction is 12mm≤D≤18mm. The side of the limiting boss near the shift arm 3 is the limiting surface. The setting position of the limiting boss meets the following conditions: when the shift lever 5 is in neutral, the limiting surface corresponds to the end side wall of the telescopic end (i.e., the working end). Defined as H, the radial height of the limiting surface is H. When the telescopic end is in the initial position, the distance between the end of the telescopic end and the outer peripheral wall of the shift lever 5 is L0. When the telescopic end is in the stop position, the distance between the end of the telescopic end and the outer peripheral wall of the shift lever 5 is L1. Then: L1<H<L0. When the working end is in the stop position, the working end is in contact with the limiting surface. When the working end is in the initial position, the working end is away from the limiting surface and can move to the right to perform reverse gear selection operation.

[0028] The distance D between the two outer end faces of the boss in the circumferential direction is 15mm. This 15mm value is reasonable for the limiting boss structure, meets the stopping requirements, and is easy to process.

[0029] Locking cylinder 4 is connected to an air source, and its working end is controlled by the on / off state of the air source. When the gearbox returns to neutral and the shifting range enters the high gear range, locking cylinder 4 receives air, causing its working end to pop out, restricting the shift lever 5 from moving to the right, thus preventing it from selecting the reverse gear position for engagement, thereby achieving the purpose of locking the gear. This structure can meet the locking requirements of a single H-circuit air circuit while ensuring that it does not affect the movement of the shift fork shaft in the upper cover, making the reversing structure fully functional and ensuring a reasonable gear sequence.

[0030] By making the side of the telescopic end closest to the limiting surface a planar structure, the contact between the telescopic end and the limiting surface changes from line contact to surface contact, resulting in more stable stopping.

[0031] This utility model also provides a control assembly suitable for a 9-speed transmission, which is characterized in that it includes the above-mentioned control mechanism suitable for a 9-speed transmission and having a gear locking function.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of this utility model.

Claims

1. A control mechanism suitable for a 9-speed transmission and having a locking function, comprising a transverse shift lever (1), the input end of which is connected to a shift arm (3) via a spline; a shift lever (1) is fixedly connected to the outer peripheral wall of its output end near the transverse shift lever (1); a groove is provided on the outer peripheral wall of the shift lever (5), and a shift selector (2) is engaged in the groove; the shift selector (2) is used to drive the shift lever (5) and the transverse shift lever (1) to move along their axial direction to perform a shift selection operation; the shift arm (3) is used to drive the transverse shift lever (1) and the shift lever (5) to rotate, thereby driving the shift fork and shift fork shaft on the transmission cover to move along their axial direction to perform a shift operation; characterized in that: It also includes a limiting device, which has a telescopic end. The telescopic end retracts to the initial position and extends to the stop position. The fixed end of the limiting device is fixedly connected to the housing of the operating mechanism. On the outer peripheral wall of the shift lever (5) and on the opposite side of the groove, a limiting boss is provided. The side of the limiting boss near the shift arm (3) is the limiting surface. The setting position of the limiting boss meets the following conditions: when the shift lever (5) is in neutral, the limiting surface corresponds to the end side wall of the telescopic end; Definition: The radial height of the limiting surface is H. When the telescopic end is in the initial position, the distance between the end of the telescopic end and the outer peripheral wall of the shift lever (5) is L0. When the telescopic end is in the stop position, the distance between the end of the telescopic end and the outer peripheral wall of the shift lever (5) is L1. Then: L1 < H < L0.

2. The operating mechanism for a 9-speed transmission with a gear-locking function according to claim 1, characterized in that: The limiting boss is a circular boss that is set around the outer wall of the shift lever (5). The two outer end faces of the boss in the circumferential direction are parallel to the midpoint of the boss in the circumferential direction through the central axis.

3. The operating mechanism for a 9-speed transmission with a gear-locking function according to claim 2, characterized in that: Definition: If the distance between the two outer end faces of the boss in the circumferential direction is D, then 12mm≤D≤18mm.

4. The operating mechanism for a 9-speed transmission with a gear-locking function according to claim 3, characterized in that: D is set to 15mm.

5. The operating mechanism for a 9-speed transmission with a gear-locking function according to claim 1, characterized in that: The limiting device is a locking cylinder (4), and the working end of the locking cylinder (4) is the extension end of the limiting device.

6. The operating mechanism for a 9-speed transmission with a gear-locking function according to claim 5, characterized in that: The locking cylinder (4) is connected to an air source, and the working end of the locking cylinder (4) is controlled to extend and retract by the on / off state of the air source.

7. The operating mechanism for a 9-speed transmission with a gear-locking function according to claim 6, characterized in that: The side of the telescopic end closest to the limiting surface has a planar structure.

8. A control assembly suitable for a 9-speed transmission and having a gear-locking function, characterized in that, The operating mechanism, as described in any one of claims 1-7, is suitable for a 9-speed transmission and has a gear-locking function.

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