CN212775516U - Interlocking plate mechanism of fork shaft transmission - Google Patents

Abstract

The utility model provides a fork shaft derailleur interlocking plate mechanism, including a plurality of shift forks, correspond fork shaft and the gear shift shaft with shift fork fixed connection, the gear shift shaft is connected with the selection shifting block, the shifting block is connected with the selection shifting shaft assembly that drives the shifting block and switch between a plurality of fork shafts, still include interlocking board and upper cover casing, be equipped with the installation cavity in the upper cover casing, be equipped with the spout on the wall of installation cavity or the up end, interlocking board slidable mounting is in the spout; the gear shifting head penetrates through the interlocking plate, and the interlocking plate moves synchronously along with the gear shifting head when the gear selecting and shifting shaft assembly drives the gear shifting head to move left and right for gear shifting; when the interlocking plate is respectively positioned at the left limit position and the right limit position of the sliding chute, the lower ends of the gear selecting and shifting heads are just correspondingly positioned at the positions of the fork shafts which can control the limit positions at the two sides. In this scheme, be equipped with on the derailleur case lid and hold the gliding sliding tray of interlocking board for the removal of interlocking board is more steady, prevents that the card pause phenomenon from appearing in the removal in-process of interlocking board.

Description

Interlocking plate mechanism of fork shaft transmission

Technical Field

The utility model relates to a derailleur field.

Background

The transmission gear selecting and shifting control mechanism is one of key parts in a manual automobile transmission, and the reliability of the control mechanism directly determines the gear shifting performance of the transmission and the comfort and reliability of automobile driving.

The interlocking of the gear selecting and shifting control mechanisms of most manual commercial vehicle automobile transmissions in the current market is realized through the interaction of steel balls and interlocking pins between the three shifting fork shafts, and the structure mainly has the following two defects: 1. interlocking is unreliable, when the gears are in a neutral gear state, no interlocking effect exists among the gears, only when the shifting block is hung in a certain gear, the rest gears are locked, and when the transmission is in the neutral gear position, the corresponding gear of the shifting block of the transmission and the related rest gears are interlocked after the corresponding gear of the shifting block is impacted by external force to be hung, so that the phenomenon of disorder or blocking of the shifting block is caused, and the reliability and the safety of automobile operation are greatly reduced; 2. the interlocking pin and the steel ball interact with the fork shaft of the transmission in the gear shifting process, so that slight clamping stagnation impact acting force can be generated, and the gear shifting performance of the transmission is negatively influenced.

Aiming at the problems, the structure of the interlocking plate exists in the prior art, and the interlocking plate can lock adjacent transmission fork shafts in the shifting head gear engaging process, so that the transmission fork shafts of adjacent gears cannot interfere with each other to generate the gear blocking phenomenon in the gear engaging process. However, in the prior art, only a structural scheme of the interlocking plate is provided, and a corresponding structural scheme is not provided for the transmission case aiming at the structure of the interlocking plate, so that the interlocking plate is still easy to be jammed in the moving process.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the technical scheme that the structure of the gearbox body is optimized aiming at the interlocking plate is not available in the prior art, the problem that the interlocking plate is blocked easily in the moving process is caused, and the problem that the interlocking plate is blocked and is not moved smoothly can be caused.

In order to solve the technical problem, the utility model provides a technical scheme as follows:

the utility model provides a fork axle derailleur interlocking board mechanism, include a plurality of shift forks at least, correspond with fork axle of shift fork fixed connection and be used for controlling the shift shaft that the fork axle removed, the shift shaft is connected with along the selection shift shifting block that extends perpendicular to shift shaft axis direction and be used for stirring the fork axle, the shift shaft is connected with the drive select shift shifting block carry out the position switching between a plurality of fork axles in order to realize the selection of gear shaft assembly, still include interlocking board and upper cover casing at least, be equipped with the installation cavity in the upper cover casing, be equipped with the spout on the wall of installation cavity or the up end, interlocking board slidable mounting in the spout and can follow the spout removes; the gear selecting and shifting block penetrates through the interlocking plate, and the interlocking plate moves synchronously with the gear selecting and shifting block when the gear selecting and shifting shaft assembly drives the gear selecting and shifting block to move; when the interlocking plate is respectively positioned at the left limit position and the right limit position of the sliding groove, the gear selecting and shifting head is just correspondingly positioned at the position of the fork shaft which can contact and control the limit positions at the two sides.

Preferably, the interlocking plate at least comprises a sliding plate, a first clamping part and a second clamping part, wherein the first clamping part and the second clamping part are fixedly arranged on two sides of the sliding plate; an avoidance gap for accommodating the gear selecting and shifting block to pass through is arranged between the first clamping part and the second clamping part, and the avoidance gap is positioned below the slot; the gear selecting and shifting block penetrates through the slot and the avoiding gap, the width of the slot is matched with that of the gear selecting and shifting block, and the slot is used for avoiding the gear selecting and shifting block moving in the length direction; the fork shafts are fixedly connected with guide blocks respectively, shifting fork grooves are formed in the guide blocks, the guide blocks on the fork shafts are arranged side by side, the shifting fork grooves are communicated with each other and extend along the movable direction of the sliding plate, and the width of each shifting fork groove is matched with the width of the first clamping part and the width of the second clamping part; when the guide block is positioned in one of the shifting fork grooves, the first clamping part and/or the second clamping part are/is correspondingly positioned in the adjacent shifting fork groove; when the sliding plate moves to the limit positions at the left end and the right end of the sliding groove, the gear selecting and shifting block is just positioned in the two shifting fork grooves at the left limit position and the right limit position.

Further, the first clamping part and the second clamping part are both provided with bent clamping plates.

Further, the clamping plate is bent from two sides to the middle.

Preferably, a detachable top cover shell is fixedly connected to the end face of the mounting cavity, and the gear shifting shaft is rotatably and movably connected with the top cover shell.

Furthermore, the gear selecting and shifting block further comprises a shifting block sleeve, the shifting block sleeve is fixedly sleeved on the gear shifting shaft, and the gear selecting and shifting block is kept fixed relative to the circumferential direction and the radial direction of the gear shifting shaft.

Further, select to keep off the axle assembly and include the selection fender handle at least, select to keep off the axle and link the board, select to keep off the axle with selection keeps off handle fixed connection, just select to keep off the axle with the rotatory swing joint of top cap casing, link board fixed connection select to keep off the axle and follow the perpendicular to the direction of selection fender axle axis extends, links the board and keeps away from one side of selecting to keep off the axle is equipped with the joint stand, the axis direction of joint stand is parallel with the direction of selection fender axle axis, be equipped with on the shifting block sleeve with the joint groove of joint stand adaptation, the joint stand is located the joint inslot.

Further, still include the select return spring that keeps off, select to keep off return spring locate the shifting block sleeve with between the inner wall of top cap casing, the fork axle includes three, just the gear shift axle is when not receiving external force select to keep off return spring will select the shifting block restriction of shifting at the intermediate position, select the shifting block of shifting to be located the position that can contact and control middle fork axle just correspondingly when selecting the shifting block to be located the intermediate position.

The advantage of above-mentioned scheme lies in, the interlocking board can freely slide in the spout, thereby the spout surface can be relatively more smooth through processing, can avoid the interlocking board to produce the stuck phenomenon at the slip in-process. Meanwhile, when the interlocking plate moves to the left limit position and the right limit position, the gear selecting shaft just can respectively control the shifting forks at the limit positions at the two sides, and the gear selecting shaft is favorably positioned.

Drawings

Fig. 1 is a schematic diagram of a preferred embodiment of the solution provided by the present invention;

FIG. 2 is a schematic view of the upper cover housing;

fig. 3 is a schematic view of the connection between the shift shaft and the transmission shaft;

fig. 4 is a schematic view showing a connection relationship between the shift shaft and the interlock plate;

fig. 5 is a schematic view showing a position where the guide block is coupled to the shift shaft;

FIG. 6 is a schematic view of the interlock plate;

FIG. 7 is a schematic view of the gear selector shaft;

description of reference numerals: 1-interlocking plate, 10-sliding plate, 11-slot, 121-first clamping plate, 122-second clamping plate, 13-avoidance gap, 2-gear shifting shaft, 20-lug, 21-gear shifting block, 210-shifting block sleeve, 22-gear selecting return spring, 23-clamping groove, 3-upper cover shell, 30-top cover shell, 31-sliding groove, 32-mounting cavity, 4-fork shaft, 40-shifting fork, 41-guide block, 410-shifting fork groove, 5-gear selecting shaft assembly, 51-gear selecting handle, 52-gear selecting shaft, 53-connecting plate and 54-clamping upright post.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may include, for example, a fixed connection, an integral connection, or a detachable connection; may be communication within two elements; they may be directly connected or indirectly connected through an intermediate, and those skilled in the art can understand the specific meaning of the above terms in the present invention in specific situations.

The utility model provides a fork axle derailleur interlocking panel mechanism, a preferred embodiment of fork axle derailleur interlocking panel mechanism is shown in fig. 1 to 5, include a plurality of shift forks 40 at least and correspond respectively with every shift fork 40 fixed connection's fork 4, common automotive transmission includes three shift fork 40 and three fork 4 usually, this embodiment is according to conventional design with setting up three shift fork 40 and three fork 4. The gear shifting device is characterized by further comprising a gear shifting shaft 2, wherein a gear selecting and shifting head 21 is connected to the gear shifting shaft 2, the gear selecting and shifting head 21 extends in the direction perpendicular to the axis of the gear shifting shaft 2, the lower end of the gear selecting and shifting head 21 is in contact with and can control one of the fork shafts 4, and when the gear shifting shaft 2 is adjusted to shift gears, the gear selecting and shifting head 21 drives the fork shafts 4 to move back and forth, so that the gear shifting function is achieved. Be equipped with upper cover casing 3 in the outside of fork 4, be equipped with installation cavity 32 on upper cover casing 3, be equipped with spout 31 on the inner wall of installation cavity 32 or up end, this embodiment sets up on the up end, and sliding connection has interlocking board 1 in spout 31. The interlocking plate 1 can move left and right along the sliding groove 31, and the gear selecting and shifting head 21 penetrates through the interlocking plate 1 and then contacts with the fork shaft 4, so that the gear shifting shaft 2 can drive the interlocking plate 1 to move synchronously in the process of moving left and right for gear selecting. In the embodiment, a gear selecting shaft assembly 5 is further provided for controlling the gear selecting and shifting dial 21 to move left and right to realize a gear selecting function, and when gear selecting is performed, a driving force in the left and right direction is applied to the gear shifting shaft 2 located outside the top cover shell 30, and the interlocking plate 1 moves in the left and right direction along with the gear selecting and shifting dial 21. When the gear selecting and shifting head 21 is shifted after falling, the gear shifting shaft 2 drives the gear selecting and shifting head 21 to move, and the gear selecting and shifting head 21 further pushes the fork shaft 4 to move back and forth, so that gear shifting is realized. Further, the interlock plate 1 is held fixed to the fork shaft 4 in the direction in which the fork shaft 4 moves, and the interlock plate 1 can restrict the fork shaft 4 adjacent to the moving fork shaft 4 to prevent the gear from being disturbed. Moreover, when the interlocking plate 1 is located at the left and right limit positions of the sliding slot 31, the gear selecting and shifting head 21 can just control the fork shafts 4 corresponding to the left and right limit positions respectively, so that the selected gear can be accurately prevented from being mistakenly engaged. The interlocking plate 1 moves smoothly in the slide groove 31 without jamming.

Referring to fig. 3 and 4, in a preferred embodiment of the present embodiment, the gear selector 21 includes a selector sleeve 210, the selector sleeve 210 is sleeved on the shift shaft 2, and the selector sleeve 210 is fixed with respect to the circumferential direction and the radial direction of the shift shaft 2. Still be equipped with select and keep off return spring 22 between shifting block sleeve 210 and top cap casing 30, under the condition that does not have external force control to select the fender axle 5 assembly, select to keep off return spring 22 and exert elasticity to shifting block sleeve 210 and restrict to select the fork 4 department that shifts shifting block 21 and be located the centre, and two fork 4 of controlling can be selected when selecting the shifting block 21 and moving left and right extreme position respectively and shift shifting block 21 and contact and control, to sum up, this embodiment has realized following state conversion scheme: when no force in the left-right direction is exerted on the gear selecting and shifting block 21, the gear selecting and shifting block 21 directly contacts and controls the middle fork shaft 4; when the gear selecting and shifting block 21 is controlled to move left and right by the gear selecting shaft assembly 5, the interlocking plate 1 is limited by the sliding chute 31 and has movable limit positions in the left and right directions, and the gear shifting shaft 2 at the left and right limit positions just corresponds to the fork shafts 4 which can control the left and right sides. In short, in this preferred embodiment, the user can clearly identify whether the shift shaft 2 is in the correct gear position, and when the shift shaft 2 is directly controlled without applying a force to the gear shaft assembly 5, the intermediate fork 40 is correspondingly controlled to enter the gear position; and control the gear selecting shaft assembly 5 first and drive the gear selecting and shifting block 21 and move the interlocking plate 1 to the extreme position of left or right and then control the gear shifting shaft 2 to engage, then correspondingly control two shift forks 40 on both sides to enter the gear respectively, and then the gear shifting shaft 2 can accurately fall on the correct engaging position, and the problem that the gear shifting shaft 2 falls between two gears and then can not shift gears or is in disorder can not appear.

Referring to fig. 5 and 6, in a preferred embodiment of the interlock plate 1, the interlock plate includes at least a sliding plate 10, a first engaging portion 121 and a second engaging portion 122 are respectively fixedly disposed on two sides of the sliding plate 10, an insertion slot 11 is disposed on an end surface of the sliding plate 10, an avoiding gap 13 is disposed between the first engaging portion 121 and the second engaging portion 122, the avoiding gap 13 is located just below the insertion slot 11, and the gear selecting and shifting dial 21 can respectively pass through the insertion slot 11 and the avoiding gap 13. Wherein the slide plate 10 is slidably connected to the slide groove 31. All be equipped with guide block 41 on every fork axle 4, all be equipped with shifting fork groove 410 on every guide block 41, guide block 41 arranges side by side, and the arrangement of guide block 41 satisfies that each shifting fork groove 410 communicates each other and extends along the portable direction of interlocking board 1, and the width of shifting fork groove 410 and the width adaptation of first card portion 121 and second card portion 122. The gear selecting and shifting block 21 penetrates through the slot 11 and the avoiding gap 13 and then is inserted into the shifting fork groove 410, and the gear selecting and shifting block 21 is in contact with the shifting fork groove 410 and can drive the fork shaft 4 to move back and forth by pushing the inner wall of the shifting fork groove 410 so as to realize gear shifting. The specific size of first card portion 121 and second card portion 122 sets up to, when selecting gear shift shifting block 21 to be located one of fork groove 410, first card portion 121 and second card portion 122 correspond and are located adjacent fork groove 410, moreover because interlocking board 1 can not produce the removal in the front and back direction, therefore can block fork groove 410 after first card portion 121 and second card portion 122 of interlocking board 1 insert fork groove 410, the fork 4 that is located the fork 4 both sides of putting into gear when selecting gear shift shifting block 21 control to put into gear carries out the putting into gear can not produce the removal, and then avoid out of order and the blocking phenomenon appears.

In the scheme, in order to avoid the interference of the slot 11 on the gear selecting and shifting head 21 to normally drive the fork shaft 4 to shift, the slot 11 reserves an avoidance space for the gear selecting and shifting head 21 in the length direction. In the width direction of the slot 11, the slot 11 is exactly matched with the gear selecting and shifting head 21, so that the interlocking plate 1 can move along with the gear selecting and shifting head 21 when the gear selecting and shifting head 21 is pushed leftwards and rightwards, and the moving position is accurate. In this scheme, the gear shift shaft 2 is selected through the drive and is shifted the rotatory mode of shifting block 21 and realize engaging in a gear and moving back the gear, and the preferred partly setting with gear shift shaft 2 is the integral key shaft, and shift block sleeve 210 sets up on the integral key shaft and shift block sleeve 210's inner wall and integral key shaft adaptation, and when gear shift shaft 2 rotated, selecting shift block 21 synchronous rotation, can provide the power of a fore-and-aft direction to the inner wall of declutch shift groove 410 when selecting shift block 21 to rotate, realizes shifting. Of course. The control of the fork shaft 4 by means of the shifting shaft 2 moving back and forth is theoretically feasible, and compared with the prior art, the scheme of rotary driving saves more space.

In a further preferred embodiment of the interlocking plate 1, the first locking portion 121 and the second locking portion 122 are both bent plate structures, which is favorable for reducing weight and facilitating production. Moreover, the first and second locking portions 121 and 122 are provided in a form of being bent from both sides to the middle, so as to design specific sizes of the respective components, and ensure that the first and second locking portions 121 and 122 can normally lock the fork shaft 4.

As shown in fig. 7, the gear selection shaft assembly 5 includes a gear selection handle 51, a gear selection shaft 52, and a link plate 53. In order to facilitate the installation of the gear selecting shaft assembly 5 and the gear shifting shaft 2, a top cover shell 30 is further arranged on the installation cavity 32, and the gear shifting shaft 2 and the gear selecting shaft 52 are both rotatably and movably connected with the top cover shell 30. The gear selecting handle 51 is fixedly connected with the gear selecting shaft 52, the gear selecting handle 51 is located outside, and the gear selecting shaft 52 can be controlled to rotate by controlling the gear selecting handle 51. The lower end of the gear selecting shaft 52 is fixedly connected with a connecting plate 53, the extending direction of the connecting plate is perpendicular to the axial direction of the gear selecting shaft 52, one end, far away from the gear selecting shaft 52, of the connecting plate 53 is fixedly connected with a clamping upright column 54, and the axis of the clamping upright column 54 is parallel to the axis of the gear selecting shaft 52. The gear selecting shaft assembly 5 is used for controlling the gear selecting and shifting head 21 to move left and right, so that correspondingly, the shifting head sleeve 210 is provided with a clamping groove 23, and the clamping upright column 54 is connected in the clamping groove 23. Correspondingly, in this embodiment, the shift knob sleeve 210 is provided with a projection 20, and the snap-in groove 23 is formed between the projection 20 and the gear selecting and shifting knob 21. When the gear selecting and shifting head 21 needs to be controlled to move left and right to select gears, the gear selecting shaft 52 is rotated, the clamping upright column 54 applies thrust to the clamping groove 23, but the interlocking plate 1 is limited by the sliding groove 31 in the front and rear directions, so that the interlocking plate 1 can only move along the sliding groove 31, the gear selecting and shifting head 21 can move left and right under the driving of resultant force, and the gear selecting function of the gear selecting and shifting shaft assembly 5 is realized.

In summary, the above description is only a preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention should be included within the scope of the present invention.

Claims (8)

1. An interlocking plate mechanism of a fork shaft transmission at least comprises a plurality of shifting forks (40), fork shafts (4) which are fixedly connected with the shifting forks correspondingly and a shifting shaft (2) used for controlling the fork shafts to move, wherein the shifting shaft is connected with a gear selecting and shifting head (21) which extends along the direction vertical to the axis of the shifting shaft and is used for shifting the fork shafts, the shifting shaft is connected with a gear selecting shaft assembly (5) which drives the gear selecting and shifting head (21) to switch positions among the fork shafts so as to realize gear selection, and the interlocking plate mechanism is characterized by also at least comprising an interlocking plate (1) and an upper cover shell (3), a mounting cavity (32) is arranged in the upper cover shell, a sliding groove (31) is arranged on the wall surface or the upper end surface of the mounting cavity, and the interlocking plate is slidably mounted in the sliding groove and can move along the sliding groove; the gear selecting and shifting block penetrates through the interlocking plate, and the interlocking plate moves synchronously with the gear selecting and shifting block when the gear selecting and shifting shaft assembly drives the gear selecting and shifting block to move;

when the interlocking plate is respectively positioned at the left limit position and the right limit position of the sliding groove, the gear selecting and shifting head is just correspondingly positioned at the position of the fork shaft which can contact and control the limit positions at the two sides.

2. The fork shaft transmission interlocking plate mechanism as claimed in claim 1, wherein the interlocking plate comprises at least a sliding plate (10) and a first clamping portion (121) and a second clamping portion (122) fixed on both sides of the sliding plate, the sliding plate is slidably connected in the sliding slot, and the sliding plate is provided with a slot (11); an avoidance gap (13) for accommodating the gear selecting and shifting head to pass through is arranged between the first clamping part and the second clamping part, and the avoidance gap is positioned below the slot; the gear selecting and shifting block penetrates through the slot and the avoiding gap, the width of the slot is matched with that of the gear selecting and shifting block, and the slot is used for avoiding the gear selecting and shifting block moving in the length direction;

the fork shafts are fixedly connected with guide blocks (41) respectively, shifting fork grooves (410) are formed in the guide blocks, the guide blocks on the fork shafts are arranged side by side, the shifting fork grooves are communicated with each other and extend along the movable direction of the sliding plate, and the width of each shifting fork groove is matched with the width of the first clamping part and the width of the second clamping part; when the guide block is positioned in one of the shifting fork grooves, the first clamping part and/or the second clamping part are/is correspondingly positioned in the adjacent shifting fork groove; when the sliding plate moves to the limit positions at the left end and the right end of the sliding groove, the gear selecting and shifting block is just positioned in the two shifting fork grooves at the left limit position and the right limit position.

3. The countershaft transmission interlocking plate mechanism of claim 2, wherein the first detent and the second detent are each configured as a bent snap plate.

4. The derailleur interlock plate mechanism of claim 3 wherein said catch plate is bent from both sides toward the middle.

5. Fork shaft transmission interlocking plate mechanism according to any of claims 2-4, characterized in that a detachable top cover housing (30) is fixedly connected to the end face of the mounting cavity, and the gear shift shaft is rotatably movably connected to the top cover housing.

6. The derailleur interlock plate mechanism as recited in claim 5, characterized in that said selector knob (21) further comprises a knob sleeve (210) fixedly sleeved on said shift shaft, said selector knob remaining fixed with respect to the circumferential and radial directions of said shift shaft.

7. The fork shaft transmission interlocking plate mechanism of claim 6, wherein the gear selecting shaft assembly at least comprises a gear selecting handle (51), a gear selecting shaft (52) and a connecting plate (53), the gear selecting shaft is fixedly connected with the gear selecting handle, the gear selecting shaft is movably connected with the top cover shell in a rotating mode, the connecting plate is fixedly connected with the gear selecting shaft and extends in a direction perpendicular to the axis of the gear selecting shaft, a clamping stand column is arranged on one side, away from the gear selecting shaft, of the connecting plate, the axis direction of the clamping stand column is parallel to the direction of the axis of the gear selecting shaft, a clamping groove (23) matched with the clamping stand column is formed in the shifting head sleeve, and the clamping stand column is arranged in the clamping groove.

8. The interlocking plate mechanism of a fork-shaft transmission as recited in claim 7, further comprising three selector return springs (22), wherein the selector return springs (22) are disposed between the shift sleeve and the inner wall of the top cover housing, and the three fork shafts are disposed, and the selector return springs limit the selector shift knob to a middle position when the gear shift shaft is not subjected to an external force, and the selector shift knob is disposed at the middle position corresponding to a position where the selector shift knob can contact and control the middle fork shaft.

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