Positioning device of transmission intermediate shaft

Abstract

The positioning device comprises a first clamping plate, a second clamping plate and a supporting rod supporting the first clamping plate and the second clamping plate, a first through positioning opening is formed in the middle of the first clamping plate, a second through positioning opening is formed in the middle of the second clamping plate, a first positioning sleeve is installed on the first positioning opening, and a second positioning sleeve is installed on the second positioning opening. A second positioning sleeve is installed on the second positioning opening, and a fixed gear meshed with the first intermediate shaft gear is detachably installed between the first clamping plate and the second clamping plate. The first positioning sleeve and the second positioning sleeve respectively clamp the transmission intermediate shaft from the upper end and the lower end, and the fixing gear fixes the first intermediate shaft gear, so that the first countersunk head locking bolt and the second countersunk head locking bolt can be conveniently and quickly tightened or disassembled. By adjusting the relative position of the fixed gear and the lining and the installation position of the first positioning sleeve, the locking bolts at the two ends of the transmission intermediate shaft are disassembled and assembled, and the effect that one set of device has two purposes is achieved. The structure is simple and compact and operation is convenient.

Description

Technical Field

[0001] This utility model relates to the field of mechanical technology, specifically to a positioning device for a transmission intermediate shaft. Background Technology

[0002] The intermediate shaft of a transmission is a gear system located between the transmission input shaft and the differential, used for speed reduction and torque amplification. A specific structure of one such intermediate shaft is as follows: Figure 1 , Figure 2 As shown, the gear shaft includes an axially hollow gear shaft 1. A transmission gear 2 is integrally provided in the middle of the gear shaft 1. An intermediate shaft bushing 3, a first intermediate shaft gear 4, and a second intermediate shaft gear 5 are sequentially sleeved and fixed at the upper end of the gear shaft 1 from top to bottom. The first intermediate shaft gear 4 and the second intermediate shaft gear 5 are fixed to the gear shaft 1 by splines. An intermediate shaft bearing 6 is interference-fitted at the lower end of the gear shaft 1. The top and bottom ends of the gear shaft 1 are respectively provided with a first internal thread and a second internal thread. A first countersunk head locking bolt 7 is threadedly connected to the first internal thread, and a second countersunk head locking bolt 8 is threadedly connected to the second internal thread. The head edge of the first countersunk head locking bolt 7 presses against the intermediate shaft bushing 3, and the head edge of the second countersunk head locking bolt 8 presses against the inner edge of the intermediate shaft bearing 6.

[0003] In an electric drive transmission, the intermediate shaft bearing 6 bears both the transmitted torque and the axial force of the gears under driving or reverse drag conditions. Therefore, a first countersunk head locking bolt 7 and a second countersunk head locking bolt 8 are installed at both ends of the intermediate shaft to prevent the intermediate shaft bearing 6, the first intermediate shaft gear 4, and the second intermediate shaft gear 5 from dislodging under axial force. When assembling the two locking bolts on the intermediate shaft, the high tightening torque necessitates a secure circumferential fixation of the intermediate shaft. Ordinary intermediate shaft locking bolt tightening and disassembly devices simply fix the intermediate shaft, positioning only one end. Furthermore, a single tooling unit is used for only one locking bolt. This positioning method results in poor positioning of the intermediate shaft and low torque accuracy during bolt tightening.

[0004] Therefore, those skilled in the art are dedicated to developing a positioning device that is simple in structure, has high positioning accuracy, and facilitates the tightening and disassembly of the locking bolts at both ends of the intermediate shaft of the transmission. Summary of the Invention

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by providing a positioning device that is simple in structure, has high positioning accuracy, and facilitates the tightening and disassembly of the locking bolts at both ends of the intermediate shaft of the transmission.

[0006] The objective of this utility model is achieved through the following solution:

[0007] A positioning device for a transmission intermediate shaft includes a first clamping plate, a second clamping plate, and a support rod supporting the first and second clamping plates. The first clamping plate has a through-hole in its center, and the second clamping plate has a through-hole in its center. A first positioning sleeve is installed on the first positioning hole, and a second positioning sleeve is installed on the second positioning hole. A fixed gear that meshes with a first intermediate shaft gear is detachably installed between the first and second clamping plates. The first and second positioning sleeves clamp the transmission intermediate shaft from the upper and lower ends, respectively, and the fixed gear fixes the first intermediate shaft gear. This allows for convenient and quick tightening or loosening of the first and second countersunk locking bolts.

[0008] Furthermore, four support rods are provided and are located at the four corners of the first clamping plate and the second clamping plate, respectively.

[0009] Furthermore, the fixed gear is sleeved and fixed on a flat support bar, the radial cross-section of which is drum-shaped.

[0010] Furthermore, a bushing is fitted onto the flat support bar, and one end of the fixed gear rests on the bushing, or one end of the fixed gear is pressed against the bottom of the bushing.

[0011] Furthermore, the second positioning sleeve is formed by connecting a lower positioning ring and an upper positioning ring end to end. The lower positioning ring is embedded in the second positioning hole, and the diameter of the lower positioning ring is smaller than the diameter of the upper positioning ring.

[0012] Furthermore, the first positioning sleeve is embedded in the first positioning port.

[0013] The advantages of this utility model are:

[0014] The first and second positioning sleeves of this positioning device clamp the intermediate shaft of the transmission from the upper and lower ends, respectively. The fixed gear fixes the first intermediate shaft gear, so that the first countersunk locking bolt and the second countersunk locking bolt can be tightened or disassembled very easily and quickly.

[0015] This positioning device has a simple and compact structure, is easy to operate, ensures proper positioning during the installation and removal of the locking bolts, and guarantees a securely fixed output shaft. The tightening torque of the locking bolts is highly accurate, avoiding false torque. Simultaneously, by adjusting the relative position of the fixed gear and bushing, and the installation position of the first positioning sleeve, the locking bolts at both ends of the transmission intermediate shaft can be installed and removed, achieving the effect of one device serving two purposes. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the intermediate shaft of a transmission in the background art;

[0017] Figure 2This is a cross-sectional view of the intermediate shaft of a transmission in the background art;

[0018] Figure 3 This is a schematic diagram of the structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the first positioning sleeve of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the second positioning sleeve of this utility model;

[0021] Figure 6 This is a structural cross-sectional view of one of the usage states of this utility model;

[0022] Figure 7 This is a cross-sectional view of the structure of this utility model in its second usage state. Detailed Implementation

[0023] To enable those skilled in the art to understand the features and effects of this application, the terms and expressions used in the specification and claims are explained and defined in general below. Unless otherwise specified, all technical and scientific terms used herein have the ordinary meaning understood by those skilled in the art in this application, and in case of conflict, the definitions in this specification shall prevail.

[0024] The theories or mechanisms described and disclosed herein, whether right or wrong, shall not in any way limit the scope of this application, that is, the content of this application may be implemented without being limited by any particular theory or mechanism.

[0025] In this document, "this application" means "this utility model" or "this disclosure".

[0026] The terms “a,” “an,” “a,” or similar expressions are used herein to describe the components and technical features described in this application. Such descriptions are merely for convenience and to provide a general meaning for the scope of this application. Therefore, such descriptions should be understood to include one or at least one, and the singular includes the plural, unless clearly otherwise indicated.

[0027] In this article, "or a combination thereof" means "or any combination thereof", and "any one", "any kind", "any one" means "any one", "any kind", "any one".

[0028] It should be understood that the features disclosed in the various embodiments herein can be arbitrarily combined to form the technical solution of this application, as long as there is no contradiction in the combination of these features.

[0029] The present application will be described below with reference to specific embodiments and examples. It should be understood that these specific embodiments and examples are merely illustrative and are not intended to limit the scope or use of the present application.

[0030] Example 1

[0031] like Figures 3 to 7 As shown, a positioning device for a transmission intermediate shaft includes a first clamping plate 9, a second clamping plate 10, and support rods 16 supporting the first clamping plate 9 and the second clamping plate 10. The first clamping plate 9 has a through-hole 11 in its center, and the second clamping plate 10 has a through-hole 12 in its center. A first positioning sleeve 13 is installed on the first positioning hole 11, and a second positioning sleeve 14 is installed on the second positioning hole 12. A fixed gear 15, which meshes with a first intermediate shaft gear 4, is detachably installed between the first clamping plate 9 and the second clamping plate 10. In this embodiment, four support rods 16 are provided, located at the four corners of the first clamping plate 9 and the second clamping plate 10 respectively. The fixed gear 15 is sleeved and fixed on a flat support bar 17, the flat support bar 17 having a drum-shaped radial cross-section. A bushing 18 is also sleeved on the flat support bar 17, and one end of the fixed gear 15 rests on the bushing 18, or one end of the fixed gear 15 is pressed against the bottom of the bushing 18. The second positioning sleeve 14 is formed by connecting a lower positioning ring 141 and an upper positioning ring 142 end to end. The lower positioning ring 141 is embedded in the second positioning opening 12, and the diameter of the lower positioning ring 141 is smaller than the diameter of the upper positioning ring 142. The first positioning sleeve 13 is embedded in the first positioning opening 11.

[0032] The method of using this positioning device to install and remove the aforementioned two locking bolts is as follows:

[0033] When it is necessary to disassemble or assemble the second countersunk locking bolt 8, such as Figure 6 As shown, the lower positioning ring 141 is embedded in the second positioning port 12, the first positioning sleeve 13 is embedded in the upper positioning ring 142, the end of the second countersunk locking bolt 8 is embedded in the first positioning sleeve 13, the first countersunk locking bolt 7 is embedded in the first positioning port 11, the fixed gear 15 is pressed on the bottom of the bushing 18, and the fixed gear 15 is meshed and fixed with the first intermediate shaft gear 4, so that the second countersunk locking bolt 8 can be easily and quickly disassembled and assembled.

[0034] When it is necessary to disassemble or assemble the first countersunk locking bolt 7, such as Figure 7As shown, the lower positioning ring 141 is embedded in the second positioning port 12, the end of the second countersunk locking bolt 8 is embedded in the upper positioning ring 142, the first positioning sleeve 13 is embedded in the first positioning port 11, the end of the first countersunk locking bolt 7 is embedded in the first positioning sleeve 13, and the fixed gear 15 is placed on the top of the bushing 18. The fixed gear 15 meshes and is fixed with the first intermediate shaft gear 4, so that the first countersunk locking bolt 7 can be easily and quickly disassembled and assembled.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications made to the present utility model by those skilled in the art without departing from the spirit of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A positioning device for a transmission countershaft, characterized in that: The first clamping plate (9) and the second clamping plate (10) are detachably connected through the support rod (16), and the first intermediate shaft gear (4) is engaged with the fixed gear (15) arranged between the first clamping plate (9) and the second clamping plate (10).

2. A variator countershaft positioning device according to claim 1, characterised in that: The support rod (16) is arranged at four corners of the first clamping plate (9) and the second clamping plate (10).

3. The positioning device of a transmission countershaft according to claim 1, characterized in that: The fixed gear (15) is sleeved on a flat support bar (17), and the radial section of the flat support bar (17) is in the shape of a drum.

4. A variator countershaft positioning device according to claim 3, wherein: The fixed gear (15) is sleeved on a flat support bar (17), and the radial section of the flat support bar (17) is in the shape of a drum.

5. The positioning device for a transmission countershaft according to claim 1, characterized in that: The fixed gear (15) is sleeved on a flat support bar (17), and the radial section of the flat support bar (17) is in the shape of a drum.

6. The positioning device of a transmission countershaft according to claim 1, characterized in that: The second positioning sleeve (14) is composed of a lower positioning ring (141) and an upper positioning ring (142) connected end to end, the lower positioning ring (141) is embedded in the second positioning opening (12), and the diameter of the lower positioning ring (141) is smaller than that of the upper positioning ring (142). The first positioning sleeve (13) is embedded in the first positioning opening (11).

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