Hot sleeve timing device for helical tooth intermediate shaft assembly
By introducing support, pull rod seat and accuracy adjustment mechanism into the gear timing device, the wear problem caused by frequent replacement of gear timing pins is solved, high accuracy and reliability of gear positioning are achieved, and the total total of spiral teeth intermediate shafts is improved The thermal set is efficient and interchangeable.
Patent Information
- Application Number
- CN202420944169.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-04-30
AI Technical Summary
In the prior art, frequent replacement of gear timing pins and positioning sleeves leads to wear of the tooth device, which leads to poor positioning accuracy.
A thermal set timing device including a support, a tie rod seat and an accuracy adjustment mechanism is designed. The gear timing pin is driven into the gear groove through the driving mechanism, and the gear timing pin position is adjusted through the accuracy adjustment mechanism to ensure multiple The center of the gear timing pin is located on the same vertical line.
It improves the accuracy and reliability of gear timing positioning, reduces the wear of gear timing pins, reduces production preparation costs, and improves processing efficiency and production line flexibility.
Smart Images
Figure CN222155432U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of gearbox intermediate shaft processing equipment, in particular to a heat-shrink fitting timing device for a spiral gear intermediate shaft assembly. Background Art
[0002] The double intermediate shaft transmission has been increasingly used in heavy-duty trucks for its strong load-bearing capacity, compact structure, light weight, and excellent performance. Its structural feature is that the number of gears is doubled by adding an auxiliary box on the basis of the original transmission, and the typical structural parts in the auxiliary box are two intermediate shafts. The appropriate intermediate shaft structure enables the excellent performance of the double intermediate shaft transmission to be brought into play. In the field of heavy-duty truck double intermediate shaft transmission processing, the hot-fitting of the helical gear intermediate shaft assembly often requires that the relative angular position relationship of multiple gear rings meet the interchangeability, and the intermediate shafts assembled at different times in the same series can be used in any combination, so the helical teeth on the intermediate shaft need to be timed.
[0003] The Chinese invention patent with the announcement number CN105965425B discloses a gear alignment method and device for the helical gear of the intermediate shaft assembly of the gearbox. The gear alignment device includes an intermediate shaft hoisting fixture and a shaft system gear alignment fixture. The shaft system gear alignment fixture locates the axial direction of the heated intermediate shaft gear through a positioning plate, and accurately aligns the hot-mounted intermediate shaft through a shaft gear alignment gauge and a gear alignment gauge. When assembling the intermediate shaft, the gear is first pre-set on the positioning plate, and then the intermediate shaft moves downward with the hoisting fixture, and the intermediate shaft passes through the gear. When the intermediate shaft and the gear are in the gap stage, the shaft gear alignment gauge and the gear alignment gauge are respectively pushed into the corresponding gear tooth grooves of the intermediate shaft and the gear to complete the gear alignment operation. However, in actual use, it is found that the gear alignment gauge (i.e., the gear timing pin and the positioning sleeve) acts on the high-temperature gear workpiece for a long time, and the continuous high temperature causes the gear alignment gauge to wear. Frequent replacement of the gear alignment gauge is very likely to cause wear of the gear alignment device, which in turn leads to poor positioning accuracy of the gear alignment device, which is difficult to meet production needs.
[0004] Therefore, this field needs a new technical solution to solve the above problems. Summary of the invention
[0005] In order to improve or solve the technical problem that the gear timing fixed pin and the positioning sleeve are frequently replaced in the prior art, which easily causes the wear of the gear device and thus leads to poor positioning accuracy, the utility model provides a heat-fit timing device for a spiral gear intermediate shaft assembly. The timing device includes: a support; a tie rod seat, at least two of which are arranged side by side on one side of the support, a gear timing fixed pin is slidably mounted on the tie rod seat, and a driving mechanism for driving the gear timing fixed pin to slide along the length direction of the gear timing fixed pin; a precision adjustment mechanism, connecting the support and the tie rod seat, and configured to drive the tie rod seat to move closer to or away from the support; the precision adjustment mechanism includes a pressure cover fixed on the support, a positioning shaft slidably arranged in the support, and an adjustment member connecting the pressure cover and the positioning shaft; the tie rod seat is fixed on one end of the positioning shaft away from the pressure cover, and the adjustment member is configured to drive the positioning shaft to move closer to or away from the pressure cover.
[0006] In the utility model, the shrink fit timing device for the spiral gear intermediate shaft assembly includes a support, a tie rod seat and a precision adjustment mechanism. The support is used to install the tie rod seat and the precision adjustment mechanism. The tie rod seat is used to install the gear timing fixed pin and the driving mechanism. When the shrink fit gear is assembled, the gear timing fixed pin is driven by the driving mechanism to be inserted into any groove tooth of the shrink fit gear, and used as the measuring tooth of the shrink fit gear, so as to change the phase of the shrink fit gear and ensure that the relative angular positions of multiple shrink fit gear measuring teeth are consistent. The precision adjustment mechanism includes a pressure cover, a positioning shaft slidably arranged in the support, and an adjustment member connecting the pressure cover and the positioning shaft. The positioning shaft is driven to move by the adjustment member, thereby driving the tie rod seat to move closer to or away from the support. When the tie rod seat is worn due to multiple replacements of the gear timing pins or there are installation errors in the gear timing pins, the centers of multiple gear timing pins are not on the same vertical line; at this time, by adjusting the position between the tie rod seat and the support, the position of the gear timing pins can be adjusted, so that the centers of multiple gear timing pins are returned to the same vertical line, ensuring the reliability of the gear timing positioning. Through the above-mentioned settings, the utility model is used for the hot-fit timing device of the helical gear intermediate shaft assembly. By setting a precision adjustment mechanism, when the tie rod seat is worn due to multiple replacements of the gear timing pins or there are installation errors in the gear timing pins, the positions of the gear timing pins can be adjusted, so that the centers of multiple gear timing pins are returned to the same vertical line, ensuring the accuracy and reliability of the gear timing positioning.
[0007] In the preferred technical solution of the shrink fit timing device for the spiral gear intermediate shaft assembly, the adjusting member is an adjusting bolt; the adjusting member is rotatably arranged in the gland, and a bolt hole matching the adjusting member is provided on the positioning shaft. Through the above arrangement, the adjusting bolt can be adjusted to facilitate the adjustment of the positioning shaft.
[0008] In the preferred technical solution of the shrink fit timing device for the spiral gear intermediate shaft assembly, a receiving groove for installing the adjusting member is provided on the gland, and a limiting sleeve is arranged on the gland to prevent the adjusting member from escaping from the receiving groove. Through the above arrangement, the arrangement of the limiting sleeve can limit the adjusting member in the gland, so that the adjusting member and the gland are in rotational connection.
[0009] In the above-mentioned preferred technical solution of the heat-fit timing device for the helical gear intermediate shaft assembly, the support includes a base and a mounting seat fixedly connected to the base; the tie rod seats are arranged side by side along the length direction of the mounting seat, and each of the tie rod seats is connected to the mounting seat via a corresponding precision adjustment mechanism.
[0010] In the preferred technical solution of the shrink fit timing device for the helical gear intermediate shaft assembly, a flat key extending along the length direction of the positioning shaft is arranged on the positioning shaft; and a key slot matching the flat key is provided on the mounting seat. Through the above arrangement, the key slot connection method can more conveniently limit the moving direction of the positioning shaft and ensure the moving accuracy of the positioning shaft.
[0011] In the preferred technical solution of the shrink fit timing device for the helical gear intermediate shaft assembly, a plurality of flat keys are evenly and spacedly arranged along the circumference of the positioning shaft. Through the above arrangement, the plurality of flat keys are arranged along the circumference of the positioning shaft, which can further improve the movement accuracy of the positioning shaft.
[0012] In the preferred technical solution of the shrink fit timing device for the helical gear intermediate shaft assembly, a mounting groove for accommodating the flat key is provided on the positioning shaft, and the flat key is fixed in the mounting groove by bolts. Through the above arrangement, the flat key can be replaced more conveniently, and the movement accuracy of the positioning shaft is ensured.
[0013] In the preferred technical solution of the shrink fit timing device for the spiral gear intermediate shaft assembly, a positioning groove is provided at one end of the positioning shaft close to the tie rod seat; and a positioning block matching the positioning groove is arranged on the tie rod seat. Through the above-mentioned arrangement, the arrangement of the positioning block and the positioning groove can increase the sliding resistance of the contact surface between the tie rod seat and the positioning shaft; at the same time, it plays a positioning role, and it is more convenient to assemble the positioning shaft and the tie rod seat.
[0014] In the preferred technical solution of the shrink fit timing device for the spiral gear intermediate shaft assembly, the tie rod seat and the positioning shaft are fixedly connected by bolts. Through the above arrangement, the bolt connection method is simple, convenient and reliable.
[0015] In the preferred technical solution of the shrink fit timing device for the spiral gear intermediate shaft assembly, the driving mechanism is a cylinder. Through the above arrangement, the cylinder is used to drive the gear timing fixed pin, which can avoid the temperature change from affecting the movement of the gear timing fixed pin. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:
[0017] Figure 1 The utility model is a schematic diagram of an embodiment of a shrink fit timing device for a helical gear intermediate shaft assembly.
[0018] Figure 2 It is another schematic diagram of an embodiment of the utility model of a shrink fit timing device for a helical gear intermediate shaft assembly.
[0019] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure at AA in the middle.
[0020] Figure 4 The utility model is a schematic diagram of a precision adjustment mechanism in a shrink fit timing device for a helical gear intermediate shaft assembly.
[0021] List of reference numerals: 1. support; 11. base; 12. mounting seat; 13. keyway; 2. pull rod seat; 21. positioning block; 22. positioning sleeve; 3. gear timing fixed pin; 4. driving mechanism; 5. precision adjustment mechanism; 51. pressure cover; 52. positioning shaft; 53. adjustment member; 54. limit sleeve; 55. flat key; 56. mounting groove; 57. positioning groove. DETAILED DESCRIPTION
[0022] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.
[0023] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0024] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0025] In order to improve or solve the technical problem of poor positioning accuracy of the gear device caused by frequent replacement of the gear timing fixed pin and the positioning sleeve in the prior art, the utility model provides a heat-fit timing device for a spiral gear intermediate shaft assembly. The timing device comprises: a support 1; a tie rod seat 2, at least two of which are arranged side by side on one side of the support 1, a gear timing fixed pin 3 is slidably mounted on the tie rod seat 2, and a driving mechanism 4 for driving the gear timing fixed pin 3 to slide along the length direction of the gear timing fixed pin 3; a precision adjustment mechanism 5, connecting the support 1 and the tie rod seat 2, and configured to drive the tie rod seat 2 to approach or move away from the support 1; the precision adjustment mechanism 5 comprises a pressure cover 51 fixed on the support 1, a positioning shaft 52 slidably arranged in the support 1, and an adjustment member 53 connecting the pressure cover 51 and the positioning shaft 52; the tie rod seat 2 is fixed at one end of the positioning shaft 52 away from the pressure cover 51, and the adjustment member 53 is configured to drive the positioning shaft 52 to approach or move away from the pressure cover 51.
[0026] Figure 1 This is a schematic diagram of an embodiment of the utility model for a shrink fit timing device for a helical gear intermediate shaft assembly. Figure 2 FIG. 2 is another schematic diagram of an embodiment of the utility model for a shrink fit timing device for a helical gear intermediate shaft assembly. Figure 1 and Figure 2 As shown, the shrink-fit timing device for the spiral gear intermediate shaft assembly of the utility model comprises a support 1, a tie rod seat 2 and a precision adjustment mechanism 5. A gear timing fixed pin 3 and a driving mechanism 4 are installed on the tie rod seat 2.
[0027] The shrink-fit timing device for the helical gear intermediate shaft assembly can be directly installed on the intermediate shaft shrink-fit machine tool, and the helical gear intermediate shaft positioning is completed in combination with the upper and lower centering mechanisms. The precision adjustment mechanism 5 realizes the precise adjustment of the horizontal position of the gear timing positioning mechanism, ensures that the centers of several gear timing pins 3 are located on the same vertical line, and the extension lines of the motion trajectories of several gear timing pins 3 intersect with the center line of the helical gear intermediate shaft, and ensures the high reliability of the gear timing positioning. The shrink-fit gear falls to a set height under gravity, and the gear timing pin 3 at the set height position is inserted into any tooth groove of the shrink-fit gear under the drive of the driving mechanism 4, and the initial phase of the center of the shrink-fit gear tooth groove is changed to be on the same vertical line as the center of the reference tooth groove, and maintained for a period of time until the shrink-fit gear and the helical gear intermediate shaft are completely interference fit. According to this method, the timing assembly of several shrink-fit gears on the helical gear intermediate shaft assembly is completed in sequence, and air cooling is maintained for 40 seconds to 60 seconds. After the shrink-fit gear and the helical gear intermediate shaft are interference fit, the assembly is completed, and the driving mechanism 4 drives the gear timing pin 3 to return to the origin.
[0028] Continue to see Figure 1 and Figure 2 In one or more embodiments, the support 1 includes a base 11 and a mounting seat 12 mounted on the base 11. Specifically, the base 11 is in the form of a roughly rectangular plate and can be fixed to an intermediate shaft shrink fit machine tool by bolts. The mounting seat 12 is in the form of a roughly rectangular column and is fixedly connected to the base 11. Exemplarily, the base 11 and the mounting seat 12 can be integrally formed, or can be fixedly connected by welding, bolting, bonding, or the like. Furthermore, a mounting hole for installing the precision adjustment mechanism 5 is provided on the mounting seat 12. The mounting hole passes through the mounting seat 12, and a plurality of mounting holes are provided along the length direction of the mounting seat 12. Based on Figure 1 In the orientation shown, the mounting hole extends in the left-right direction. Specifically, four mounting holes are provided along the length direction of the mounting seat 12. Alternatively, three, five or other suitable numbers of mounting holes can be provided. Further, a key slot 13 is also provided on the mounting seat 12. The key slot 13 extends along the length direction of the mounting hole, and a plurality of key slots 13 are evenly arranged at intervals along the circumference of the mounting hole. Specifically, four key slots 13 are provided. Alternatively, three, five or other suitable numbers of key slots 13 can be provided.
[0029] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure at AA in the figure. Figure 1 , Figure 2 and Figure 3 As shown, in one or more embodiments, at least two tie rod seats 2 are provided, and at least two tie rod seats 2 are arranged side by side along the length direction of the mounting seat 12, and are both provided with one side of the mounting seat 12. Figure 1In the orientation shown, the tie rod seat 2 is provided on the right side of the mounting seat 12. Specifically, four tie rod seats 2 are provided. Alternatively, three, five or other suitable numbers of tie rod seats 2 can also be provided. Each tie rod seat 2 is connected to the mounting seat 12 through a corresponding precision adjustment mechanism 5, and the shrink-fitting of the helical gear intermediate shaft assembly of different gears can be achieved by increasing or decreasing the number of tie rod seats 2. Further, a bolt hole is provided on the tie rod seat 2, and the tie rod seat 2 and the precision adjustment mechanism 5 are fixedly connected by bolts. Further, a positioning block 21 is arranged on the side of the tie rod seat 2 close to the precision adjustment mechanism 5. The positioning block 21 is in the shape of a long strip. Further, a gear timing fixed pin 3 and a driving mechanism 4 for driving the gear timing fixed pin 3 to slide are slidably installed on the tie rod seat 2. Specifically, the driving mechanism 4 is a cylinder. A mounting through hole is provided on the tie rod seat 2. The gear timing fixed pin 3 is slidably arranged in the mounting through hole, and the driving mechanism 4 is installed at one end of the mounting through hole. For example, the drive mechanism 4 is mounted on one end of the tie rod seat 2 through a threaded structure, and the gear timing fixed pin 3 is connected to the cylinder shaft of the drive mechanism 4 through a threaded structure. Figure 2 In the orientation shown, the drive mechanism 4 is arranged at the right end of the tie rod seat 2, and the gear timing fixed pin 3 extends in the left and right directions. Further, a positioning sleeve 22 is fixed in the installation through hole. The gear timing fixed pin 3 is inserted into the positioning sleeve 22 and slides under the guidance of the positioning sleeve 22.
[0030] Figure 4 The utility model is a schematic diagram of the precision adjustment mechanism in the shrink fit timing device for the helical gear intermediate shaft assembly. Figure 3 and Figure 4 As shown, in one or more embodiments, the precision adjustment mechanism 5 includes a pressure cover 51 fixed on the support 1, a positioning shaft 52 slidably arranged in the support 1, and an adjustment member 53 connecting the pressure cover 51 and the positioning shaft 52. Specifically, the pressure cover 51 is roughly in the shape of a rectangular plate and is fixed on the mounting seat 12. The pressure cover 51 and the pull rod seat 2 are respectively arranged on opposite sides of the mounting seat 12. The pressure cover 51 and the mounting seat 12 can be fixed by bolt connection, welding, bonding, etc. Further, the adjustment member 53 is an adjustment bolt. The adjustment member 53 is rotatably connected to the pressure cover 51. Specifically, a receiving groove for accommodating the adjustment member 53 is provided on the pressure cover 51. The receiving groove runs through the pressure cover 51, and one end is large and the other end is small; the diameter of the nut of the adjustment member 53 is larger than the diameter of the small end and smaller than the diameter of the large end. Based on Figure 3 In the orientation shown, the right end of the receiving groove is large and the left end is small. Further, a limiting sleeve 54 is provided on the pressure cover 51 to prevent the adjusting member 53 from escaping from the receiving groove. Specifically, the limiting sleeve 54 is provided with a large end, thereby preventing the adjusting member 53 from escaping from the large end.
[0031] Continue to see Figure 3 and Figure 4In one or more embodiments, a threaded hole matching the adjusting member 53 is provided on the positioning shaft 52. By rotating the adjusting member 53 forward and backward, the positioning shaft 52 is pushed close to or away from the gland 51, thereby driving the tie rod seat 2 close to or away from the support 1, that is, adjusting the position of the gear timing fixed pin 3, so that the centers of multiple gear timing fixed pins 3 return to the same vertical line, and ensure the reliability of the gear timing positioning. Further, a flat key 55 matching the key slot 13 is arranged on the positioning shaft 52, and the flat key 55 extends along the length direction of the positioning shaft 52. Further, a plurality of flat keys 55 are evenly and spacedly arranged along the circumference of the positioning shaft 52. Specifically, four flat keys 55 are evenly and spacedly arranged along the circumference of the positioning shaft 52. Alternatively, three, five or other suitable numbers of flat keys 55 can be provided. Further, a mounting groove 56 for accommodating the flat key 55 is provided on the positioning shaft 52, and the flat key 55 is installed in the mounting groove 56 by bolts. Alternatively, the flat key 55 can be fixed in the installation groove 56 by other suitable means such as bonding. Furthermore, a positioning groove 57 matching the positioning block 21 is also provided on the positioning shaft 52, and the positioning groove 57 is provided at one end close to the tie rod seat 2. At the same time, the precision adjustment structure drives the gear timing fixed pin 3 to move, which can correspond to different positions of the helical teeth on the vertical line. The utility model is used for the heat-fit timing device of the helical gear intermediate shaft assembly, which is convenient to process and install, can meet the high position precision timing requirements of the heat-fit gears of the whole series of helical gear intermediate shaft assemblies, greatly improves the processing efficiency and processing accuracy, can improve the interchangeability of the helical gear intermediate shafts, reduces the production preparation cost of the heat-fit assembly of the helical gear intermediate shafts, and improves the flexibility of the production line and the flexibility of convenient production change.
[0032] So far, the technical scheme of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical schemes after these changes or substitutions will fall within the protection scope of the present invention.
Claims
1. A shrink fit timing device for a helical gear intermediate shaft assembly, characterized in that: include: Support (1); At least two tie rod seats (2) are provided, and at least two tie rod seats (2) are arranged side by side on one side of the support (1); a gear timing fixed pin (3) is slidably mounted on the tie rod seat (2), and a driving mechanism (4) driving the gear timing fixed pin (3) to slide along the length direction of the gear timing fixed pin (3); A precision adjustment mechanism (5) connects the support (1) and the tie rod seat (2), and is configured to drive the tie rod seat (2) to move closer to or away from the support (1); the precision adjustment mechanism (5) includes a pressure cover (51) fixed on the support (1), a positioning shaft (52) slidably arranged in the support (1), and an adjustment member (53) connecting the pressure cover (51) and the positioning shaft (52); the tie rod seat (2) is fixed to one end of the positioning shaft (52) away from the pressure cover (51), and the adjustment member (53) is configured to drive the positioning shaft (52) to move closer to or away from the pressure cover (51).
2. The shrink fit timing device for a helical gear intermediate shaft assembly according to claim 1, characterized in that: The adjusting member (53) is an adjusting bolt; the adjusting member (53) is rotatably arranged in the pressure cover (51), and a bolt hole matching the adjusting member (53) is opened on the positioning shaft (52).
3. The shrink fit timing device for a helical gear intermediate shaft assembly according to claim 2, characterized in that: The pressure cover (51) is provided with a receiving groove for installing the adjusting member (53), and the pressure cover (51) is provided with a limiting sleeve (54) for preventing the adjusting member (53) from escaping from the receiving groove.
4. The shrink fit timing device for a helical gear intermediate shaft assembly according to claim 1, characterized in that: The support (1) comprises a base (11) and a mounting seat (12) fixedly connected to the base (11); the tie rod seats (2) are arranged side by side along the length direction of the mounting seat (12), and each tie rod seat (2) is connected to the mounting seat (12) via a corresponding precision adjustment mechanism (5).
5. The shrink fit timing device for a helical gear intermediate shaft assembly according to claim 4, characterized in that: A flat key (55) extending along the length direction of the positioning shaft (52) is arranged on the positioning shaft (52); and a keyway (13) matching the flat key (55) is provided on the mounting seat (12).
6. The shrink fit timing device for a helical gear intermediate shaft assembly according to claim 5, characterized in that: A plurality of the flat keys (55) are evenly and spacedly arranged along the circumference of the positioning shaft (52).
7. The shrink fit timing device for a helical gear intermediate shaft assembly according to claim 5, characterized in that: A mounting groove (56) for accommodating the flat key (55) is provided on the positioning shaft (52), and the flat key (55) is fixed in the mounting groove (56) by means of bolts.
8. The shrink fit timing device for a helical gear intermediate shaft assembly according to claim 1, characterized in that: A positioning groove (57) is provided at one end of the positioning shaft (52) close to the pull rod seat (2); and a positioning block (21) matching the positioning groove (57) is arranged on the pull rod seat (2).
9. The shrink fit timing device for a helical gear intermediate shaft assembly according to claim 8, characterized in that: The pull rod seat (2) and the positioning shaft (52) are fixedly connected via bolts.
10. The shrink fit timing device for a helical gear intermediate shaft assembly according to claim 1, characterized in that: The driving mechanism (4) is a cylinder.