Shifting block assembly and transmission gear selecting mechanism

Abstract

A shifting block assembly and a transmission gear selecting mechanism belong to the technical field of transmissions, the shifting block assembly comprises a shifting block, the upper end of the shifting block is slidably provided with a stop column used for being matched with a shifting block, the stop column is of a stepped column structure, the stop column is sleeved with a first spring so as to improve the gear selecting hand feeling, and the upper end of the shifting block is further provided with an elastic abutting mechanism. The axis of the elastic abutting mechanism is perpendicular to the axis of the stop column, a guide groove is formed in the outer wall of the stop column, a surface difference exists at the intersection of the outer wall of the stop column and the end of the guide groove, and the elastic abutting mechanism abuts against the guide groove. According to the shifting block assembly, the gear selecting hand feeling is enhanced, the gear selecting hand feeling is fed back to an operator more obviously, the suddenly-changed gear selecting force is instantaneous response, the reaction hand feeling force on the gear selecting stroke cannot be additionally increased, the operation experience is guaranteed, the matching mode of all components of the shifting block assembly is simple, the machining precision requirement is low, and reliability is high.

Description

Technical Field

[0001] The present invention relates to the technical field of transmissions, and in particular to a shift block assembly and a transmission gear selection mechanism. Background Art

[0002] MT transmission, a mechanical transmission, requires manual control of the gear selection mechanism to control the meshing position of the gears in the transmission, so as to achieve the purpose of speed shifting. The gear selection mechanism is an important component of the MT transmission. A well-functioning gear selection mechanism is the basic condition to ensure the normal operation of the transmission. The feel of selecting and shifting gears is an important indicator of the good function of the gear selection mechanism.

[0003] At present, a gearbox selection feel device (publication number CN103836177B) has appeared. A first spring is arranged between the side cover and the gearbox transverse shift lever, and a locking pin is fixed on the side of the side cover. A second spring and a baffle for squeezing the second spring are mounted on the locking pin. The 1 / 2 reverse gear conversion is reflected by compressing different springs. When selecting 1 / 2 gear, the transverse shift lever only compresses the first spring. When switching from 1 / 2 gear to R gear, the first and second springs are compressed at the same time to make the gear selection feel clearer.

[0004] The existing gearbox gear selection feel device needs to ensure the coaxiality between the groove at the end of the transverse gear shift lever and the lock pin, otherwise the lock pin cannot be inserted into the groove, thereby hindering the gear shifting. It requires high processing and installation precision and has poor reliability. After long-term and frequent use, the lock pin is very easy to tilt, affecting the coordination between the groove and the lock pin. In addition, when shifting from 1 / 2 gear to R gear, the feel needs to be increased through the coordination of two springs, but this also increases the gear selection force, affecting the operating experience. Summary of the invention

[0005] In order to solve the technical problems in the above-mentioned background technology that the existing transmission gear selection feel device has high precision requirements, poor reliability, increased gear selection force, and affects the operating experience, the present invention provides a shift block assembly and a transmission gear selection mechanism.

[0006] The technical solution of the present invention is as follows: The invention provides a shift block assembly, comprising a shift block, an upper end of the shift block is slidably provided with a stop column for cooperating with the shift head, the stop column is a stepped columnar structure, and a first spring is sleeved on the stop column. When shifting gears, the shift head pushes the stop column to slide, thereby compressing the first spring to realize the change of gear selection force and improve the gear selection hand feeling. The upper end of the shift block is also provided with an elastic abutment mechanism, the axis of the elastic abutment mechanism is perpendicular to the axis of the stop column, and a guide groove is provided on the outer wall of the stop column, the length of the guide groove is shorter than the gear selection stroke, and the outer wall of the stop column and the end of the guide groove have a surface difference at the intersection, and the elastic abutment mechanism abuts with the guide groove. During the gear selection process, on the basis of a linear resistance hand feeling force given by the first spring, an additional sudden gear selection force is additionally added, so as to enhance the gear selection hand feeling and make the gear selection hand feeling feedback to the operator more obvious, and the sudden gear selection force is an instantaneous reaction, and will not additionally increase the resistance hand feeling force on the gear selection stroke, so as to ensure the operation experience, the cooperation mode between the components of the shift block assembly is simple, the processing accuracy requirement is low, the gear selection failure phenomenon will not occur, and the reliability is high.

[0007] Preferably, a slide is provided at the upper end of the shift block, and the slide is a stepped hole structure. The stop column is slidably arranged in the slide, and both ends of the stop column extend outward from the slide to achieve compression of the first spring during the sliding process of the stop column through the cooperation of the stepped structure, thereby increasing the gear selection resistance force.

[0008] Preferably, the stop column includes a first column portion and a second column portion which are coaxially arranged, the diameter of the first column portion is larger than that of the second column portion, the first spring is sleeved on the second column portion, one end of the second column portion away from the first column portion extends out of the slideway and is detachably provided with a retaining ring, the setting of the stepped columnar structure facilitates the installation and use of the first spring, and the setting of the retaining ring prevents the stop column from falling out when it is reset.

[0009] Preferably, the guide groove is arranged on the outer wall of the first column portion, the guide groove extends axially along the first column portion, one end of the guide groove coincides with the junction of the first column portion and the second column portion, and the length of the guide groove is shorter than the length of the first column portion to form a surface difference on the outer wall of the first column portion. During the axial movement of the stop column, the steel ball is rollingly connected to the outer wall of the first column portion. When the steel ball is located at the surface difference position of the outer wall of the first column portion, it plays an obstructive role, thereby adding an additional force mutation on the basis of the linear resistance tactile force, thereby enhancing the gear selection feel and making the gear selection tactile feedback to the operator more obvious.

[0010] Preferably, a mounting groove is provided at the upper end of the shift block, the mounting groove is located on one side of the slideway and is perpendicular to the slideway, and the elastic abutment mechanism is installed in the mounting groove, which facilitates the installation and use of the elastic abutment mechanism.

[0011] Preferably, the elastic abutment mechanism includes a second spring and a steel ball, the second spring is arranged in the mounting groove, one end of the second spring is connected to the spring seat, the other end of the second spring abuts against the steel ball, the steel ball is partially placed in the mounting groove, and the steel ball contacts the outer wall of the stop column, so as to achieve the generation of sudden force through the cooperation of the guide groove, the outer wall of the stop column and the steel ball.

[0012] Preferably, the stiffness of the second spring is smaller than that of the first spring to avoid affecting the operating feel of the shift block.

[0013] Preferably, the spring seat and the mounting groove are threadedly connected to facilitate adjustment of the overall stiffness of the elastic abutment mechanism, thereby adjusting the magnitude of the sudden change force to meet the needs of different users.

[0014] Preferably, a guide structure is provided between the slideway and the stop column to prevent the stop column from rotating around the axis and deflecting.

[0015] The invention provides a transmission gear selection mechanism, which adopts a shift block assembly with the function of improving the gear selection feel.

[0016] It can be seen from the above technical solutions that the advantages of the present invention are: 1. Through the coordinated use of the stop column, the first spring and the elastic abutment mechanism, the linear resistance force provided by the first spring is mainly used as the basis for improving the feel when selecting gears during the entire gear selection stroke, and on this basis, an instantaneous mutation force is provided to further increase the gear selection feel, thereby ensuring that accurate gear selection information is provided to the operator, preventing incorrect gear selection and thus causing gear selection errors, and the mutation gear selection force is an instantaneous reaction, which will not increase the resistance feel force on the gear selection stroke, thereby ensuring the operating experience, the coordination between the various components of the shift block assembly is simple, the processing accuracy requirement is low, there will be no gear selection failure, and the reliability is high.

[0017] 2. The length of the guide groove is shorter than that of the first column portion to form a surface difference on the outer wall of the first column portion. During the axial movement of the stop column, the steel ball is rollingly connected to the outer wall of the first column portion. When the steel ball is located at the surface difference position of the outer wall of the first column portion, it acts as an obstacle to add an additional force mutation on the basis of the linear resistance tactile force, thereby enhancing the gear selection feel and making the gear selection tactile feedback more obvious to the operator. Moreover, when the steel ball rolls out of the guide groove, it will not increase the resistance tactile force on the gear selection stroke, thereby ensuring the operating experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the structure of the shift block assembly in the transmission selector mechanism in use state according to one or more embodiments of the present invention; Figure 2 It is a three-dimensional structural schematic diagram of a shift block assembly according to one or more embodiments of the present invention; Figure 3 It is a schematic diagram of an exploded structure of a shift block assembly according to one or more embodiments of the present invention; Figure 4 A schematic diagram of an internal installation structure of a shift block of a shift block assembly according to one or more embodiments of the present invention; Figure 5 A schematic diagram of the change of the shifting force during the shifting process of the shift block assembly according to one or more embodiments of the present invention; The components represented by the reference numerals in the figure are: 1. shift block; 2. stop column; 3. first spring; 4. retaining ring; 5. spring seat; 6. second spring; 7. steel ball; 8. first column; 9. second column; 10. guide groove; 11. slideway. DETAILED DESCRIPTION

[0020] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0021] Example 1 In a typical embodiment of the present invention, Figure 1-Figure 5As shown, a shift block assembly is proposed, comprising: a shift block 1, a stop column 2, a first spring 3 and an elastic abutment mechanism, the stop column 2 is slidably arranged inside the upper end of the shift block 1, both ends of the stop column 2 extend outward from the shift block 1, the stop column 2 is a stepped columnar structure, a first spring 3 is sleeved on the stop column 2, the stop column 2 is used to contact with the shift head, when shifting, the shift head pushes the stop column 2 to move toward the inside of the shift block 1, thereby compressing the first spring 3, realizing the change of the gear selection force, and improving the gear selection feel; an elastic abutment mechanism is also installed inside the upper end of the shift block 1, and the elastic abutment mechanism The axis of the connecting mechanism is perpendicular to the axis of the stop column 2. A guide groove 10 is opened on the side wall of the stop column 2. The length of the guide groove 10 is shorter than the axial sliding distance of the stop column 2 (i.e., the gear selection stroke). The elastic abutment mechanism abuts against the guide groove 10 to add an additional force mutation on the basis of a linear resistance tactile force given by the first spring 3 during the gear selection process, thereby enhancing the gear selection feel and making the gear selection tactile feedback to the operator more obvious. The force mutation is an instantaneous reaction, and will not increase the resistance tactile force on the gear selection stroke, thereby ensuring the operating experience.

[0022] Specifically, a slideway 11 is opened at the upper end of the shift block 1, and the slideway 11 passes through the shift block 1 horizontally. The slideway 11 is a stepped hole structure with the inner diameter gradually decreasing along the axial direction. The slideway 11 is divided into three sections with different inner diameters. The stop column 2 is slidably set in the slideway 11, and the two ends of the stop column 2 extend outward from the slideway 11.

[0023] The stop column 2 is a stepped columnar structure, and the stop column 2 includes a first column portion 8 and a second column portion 9. The first column portion 8 and the second column portion 9 are coaxially arranged and fixedly connected as a whole. The diameter of the first column portion 8 is larger than that of the second column portion 9. The first spring 3 is sleeved on the second column portion 9, and a retaining ring 4 is detachably installed on the end of the second column portion 9 away from the first column portion 8 to limit the overall movement of the stop column 2 and prevent the stop column 2 from sliding out of the slideway 11 when it is reset under the action of the first spring 3.

[0024] For ease of explanation, in this embodiment, the three sections of the slide 11 are respectively referred to as the first section, the second section and the third section, wherein the diameter of the first section is larger than that of the second section, the diameter of the second section is larger than that of the third section, the diameter of the first column portion 8 is the same as the diameter of the second section, the diameter of the second column portion 9 is the same as the diameter of the third section, the stop column 2 is slidably arranged in the slide 11 as a whole, the end of the first column portion 8 extends outward from the first section for connection with the dial head, and the end of the second column portion 9 away from the first column portion 8 extends outward from the third section and is installed with a retaining ring 4.

[0025] A mounting groove is also provided inside the upper end of the shift block 1 . The mounting groove is located on one side of the slideway 11 and is perpendicular to the slideway 11 . The elastic abutment mechanism is detachably mounted in the mounting groove to abut against the side wall of the stop column 2 .

[0026] The elastic abutment mechanism includes a spring seat 5, a second spring 6 and a steel ball 7. The mounting groove contains an internal thread, the spring seat 5 contains an external thread, the spring seat 5 is detachably connected to the mounting groove by a threaded connection, one end of the second spring 6 is fixedly connected to the spring seat 5, and the other end of the second spring 6 abuts against the steel ball 7. The second spring 6 is arranged in the mounting groove, and the steel ball 7 is partially placed in the mounting groove. The part of the steel ball 7 exposed from the mounting groove is used to contact the outer wall of the stop column 2.

[0027] It should be noted that the stiffness of the second spring 6 is smaller than the stiffness of the first spring 3 .

[0028] like Figure 4 As shown, a guide groove 10 is provided on the outer wall of the first column portion 8 of the stop column 2. The guide groove 10 extends along the axial direction of the first column portion 8. One end of the guide groove 10 coincides with the fixed connection position of the first column portion 8 and the second column portion 9 (i.e., the junction of the first column portion 8 and the second column portion 9). The length of the guide groove 10 is shorter than the length of the first column portion 8, so that the outer wall of the first column portion 8 is located at the end of the guide groove 10 away from the second column portion 9 to form a surface difference. During the axial movement of the stop column 2 (i.e., in the gear selection stroke), the steel ball 7 is rollingly connected to the outer wall of the first column portion 8. When the steel ball 7 is located at the surface difference position of the outer wall of the first column portion 8, it plays an obstructive role, so as to add an additional force mutation on the basis of the linear resistance to the tactile force, thereby enhancing the gear selection feel and making the tactile feedback of the gear selection more obvious to the operator.

[0029] It can be understood that the face difference position on the outer wall of the first column portion 8 in this embodiment can be a face difference transition zone, that is, a connection with a smooth or gradually changing connection (such as a fillet, a chamfer, or a bevel); it can also be a face difference transition uneven zone, that is, a vertical height difference is formed at the intersection of the planes (the two intersecting planes are vertical planes). The specific setting method can be selected according to actual design requirements. No excessive restrictions are made here. In order to make the instantaneous characteristics of force mutation more obvious, this embodiment adopts the setting method of the face difference transition uneven zone.

[0030] In other embodiments, in order to improve reliability, a guide structure may be provided between the slide 11 and the first column portion 8. For example, a guide groove may be provided on the side wall of the slide 11, and a slider may be fixedly provided on the side wall of the first column portion 8 so that the slider is slidably provided in the guide groove to prevent the stop column 2 from rotating around the axis and causing deflection.

[0031] The specific working principle is: When selecting a gear (such as reverse gear), the shift head contacts one end of the first column portion 8 of the stop column 2, and the shift head pushes the first column portion 8 to move axially, thereby compressing the first spring 3 during the gear selection stroke, adding a linear resistance force during the entire gear selection stroke to improve the feel when selecting a gear (such as reverse gear). Figure 5 0-S 1The magnitude of the resistance force can be adjusted by the stiffness of the first spring 3 to meet the subjective feelings of different operators when selecting gears. During this process, the steel ball 7 rolls along the guide groove 10; When the steel ball 7 moves to the end of the guide groove 10 (i.e., the surface difference position between the guide groove 10 and the first column portion 8), the steel ball 7 acts as an obstacle to the stop column 2. When the stop column 2 continues to move, it pushes the steel ball 7 into the mounting groove of the shift block 1. At this time, due to the obstruction of the steel ball 7, an additional sudden shift force is added to the shift stroke to further enhance the shift feel (such as Figure 5 S 1 -S 2 The sudden change in the gear selection force occurs instantaneously. When the steel ball 7 is retracted into the mounting groove, the steel ball 7 escapes from the guide groove 10 and continues to roll in contact with the outer wall of the first column portion 8, without hindering the movement of the stop column 2 (such as Figure 5 S 2 -S segment), since the compression amount of the second spring 6 is small, the steel ball 7 has little effect on the movement of the stop column 2. When the steel ball 7 escapes from the guide groove 10, the resistance force is changed back to the linear resistance force provided by the first spring 3, so that the linear resistance force provided by the first spring 3 is mainly used as the basis for improving the hand feeling when selecting gears in the entire gear selection stroke, and on this basis, an instantaneous mutation force is provided to further increase the hand feeling of gear selection, ensure that accurate gear selection information is provided to the operator, prevent the occurrence of wrong gear selection and thus gear selection errors, and will not increase excessive gear selection burden; When the gear selection is cancelled, the stop column 2 is automatically reset under the action of the first spring 3, and the steel ball 7 falls into the guide groove 10 again.

[0032] It should be noted that the surface difference between the guide groove 10 and the first column portion 8 should be set before the gear selection stroke is completed, for example, at the 1 / 4, 1 / 3, and 1 / 2 positions of the gear selection stroke, so as to significantly increase the gear selection feel before the gear selection is completed and prevent incorrect gear selection.

[0033] It is understandable that the sudden change force provided by the steel ball 7 can be adjusted by adjusting the stiffness of the second spring 6 or the screw-in length of the spring seat 5 according to the subjective feelings of different operators.

[0034] The shift block assembly in this embodiment not only improves the gear selection feel, but also does not increase the gear selection burden too much, thereby ensuring the operating experience. The coordination between the components is simple, the processing accuracy requirements are low, there will be no gear selection failure, and the reliability is high.

[0035] Example 2 In another typical embodiment of the present invention, a transmission gear selection mechanism is provided, comprising: a shift block assembly, the shift block assembly is installed in the transmission case, and the shift block assembly is used in conjunction with a shift head. The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A block assembly, comprising: A shift block (1) is characterized in that a stop column (2) for cooperating with a shift head is slidably provided at the upper end of the shift block (1), the stop column (2) being a stepped columnar structure, a first spring (3) being sleeved on the stop column (2), an elastic abutment mechanism being further provided at the upper end of the shift block (1), the axis of the elastic abutment mechanism being perpendicular to the axis of the stop column (2), a guide groove (10) being provided on the outer wall of the stop column (2), the length of the guide groove (10) being shorter than the gear selection stroke, a surface difference being present at the intersection of the outer wall of the stop column (2) and the end of the guide groove (10), and the elastic abutment mechanism abutting against the guide groove (10).

2. The block assembly according to claim 1, characterized in that: A slideway (11) is provided at the upper end of the shifting block (1), the slideway (11) being a stepped hole structure, the stop column (2) being slidably arranged in the slideway (11), and the two ends of the stop column (2) extending outward from the slideway (11).

3. The shift block assembly according to claim 1, characterized in that: The stop column (2) comprises a first column portion (8) and a second column portion (9) which are coaxially arranged, the diameter of the first column portion (8) being larger than that of the second column portion (9), the first spring (3) being sleeved on the second column portion (9), one end of the second column portion (9) away from the first column portion (8) extending out of the slideway (11), and a retaining ring (4) being detachably mounted thereon.

4. The shift block assembly according to claim 3, characterized in that: The guide groove (10) is arranged on the outer wall of the first column portion (8), the guide groove (10) extends along the axial direction of the first column portion (8), one end of the guide groove (10) coincides with the junction of the first column portion (8) and the second column portion (9), and the length of the guide groove (10) is shorter than the length of the first column portion (8).

5. The shift block assembly according to claim 1, characterized in that: An installation groove is provided at the upper end of the shift block (1), the installation groove is located on one side of the slideway (11) and is perpendicular to the slideway (11), and the elastic abutment mechanism is installed in the installation groove.

6. The shift block assembly according to claim 5, characterized in that: The elastic abutment mechanism comprises a second spring (6) and a steel ball (7); the second spring (6) is arranged in the mounting groove; one end of the second spring (6) is connected to a spring seat (5); the other end of the second spring (6) abuts against the steel ball (7); a portion of the steel ball (7) is disposed in the mounting groove; and the steel ball (7) contacts an outer wall of the stop column (2).

7. The shift block assembly according to claim 6, characterized in that: The second spring (6) has a stiffness smaller than that of the first spring (3).

8. The shift block assembly according to claim 6, characterized in that: The spring seat (5) is threadedly connected to the mounting groove.

9. The shift block assembly according to claim 2, characterized in that: A guide structure is provided between the slideway (11) and the stop column (2).

10. A transmission gear selection mechanism, characterized in that: A shift block assembly as claimed in any one of claims 1 to 9 is used.

Images