Power transmission structure for gearbox rack test

Abstract

The utility model provides a power transmission structure for a gearbox bench test, which comprises a power transmission transition spline housing, and a first internal spline which can be matched with an external spline of a gearbox transmission input spline is arranged at the end of one side of a housing body of the power transmission transition spline housing. A second internal spline which can be matched with the external spline of the rack end input spline is arranged at the end head of the other side of the power transmission transition spline sleeve body, and the rack end input spline is in shaft connection with the rack input shaft.

Description

TECHNICAL FIELD

[0001] The utility model relates to a power transmission structure for gearbox bench test. BACKGROUND

[0002] The gearbox is tested on the bench and is different from the installation mode of the actual vehicle, the spline shaft bench installation requires higher precision, the shaft and the hole need to be strictly aligned and axially inserted, the installation precision is high, and the assembly of long shafts or heavy components is difficult.

[0003] The previous test power transmission input gearbox mode is according to the engine actual vehicle mode, the power transmission spline shaft sleeve on the bench is directly combined with the gearbox spline shaft to drive.

[0004] The gearbox transmission input shaft and the bench output transmission shaft sleeve are completely fixed on the bench, and the coaxiality of the two shafts is required to be "completely consistent".

[0005] As shown in the prior art power transmission structure in Figure 1 The gearbox transmission input spline 110 and the bench transmission output spline shaft sleeve 120 are directly matched, the bench transmission output spline shaft sleeve 120 is coaxial with the bench input shaft and is an integral structure. UTILITY MODEL CONTENTS

[0006] The utility model wants to overcome the above insufficient of prior art, provide a kind of power transmission structure for gearbox bench test, which can effectively adjust the coaxiality error of gearbox transmission shaft and bench transmission shaft, greatly reduce the adjustment precision requirement.

[0007] The technical problems thereof can be solved by the following technical solutions.

[0008] The utility model provides a power transmission structure for gearbox bench test, its characterized in being: including a power transmission transition spline sleeve, the first inner spline that the sleeve body one side end head of power transmission transition spline sleeve is equipped with can cooperate with the outer spline of gearbox transmission input spline, the second inner spline that the sleeve body other side end head of power transmission transition spline sleeve is equipped with can cooperate with the outer spline of bench end input spline, and the bench end input spline is connected with the bench input shaft.

[0009] Further, the sleeve body of the power transmission transition spline sleeve is a through hole.

[0010] Preferably, the through hole is a stepped hole with narrow middle and wide both sides.

[0011] Preferably, along the axial direction, the stepped faces of both sides of the stepped hole abut against the end faces of the corresponding end heads of the gearbox transmission input spline and the bench end input spline respectively.

[0012] Further, the sleeve body of the power transmission transition spline sleeve is provided with a plug in the middle.

[0013] Preferably, along the axial direction, the both ends of the plug are respectively provided with gaps from the end faces of the corresponding end heads of the gearbox transmission input spline and the bench end input spline.

[0014] Further, the power transmission transition spline sleeve is a flexible spline sleeve.

[0015] Further, the inner spline of the power transmission transition spline sleeve is interference fit with the outer spline of the gearbox transmission input spline.

[0016] The power transmission structure for gearbox bench test has the following characteristics and beneficial effects:

[0017] 1. Small radial space occupation, compact design, especially suitable for cases with small axial installation space;

[0018] 2. Automatic adjustment of the coaxiality error between the gearbox transmission shaft and the bench transmission shaft within a certain range is realized;

[0019] 3. Floating connection can be realized by using the axial combination gap of the gearbox transmission input spline and the bench end input spline;

[0020] 4. The precision requirement for the transmission structure can be reduced to a certain extent. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The prior art power transmission structure;

[0022] Figure 2 The power transmission structure for gearbox bench test of the embodiment 1 of the utility model;

[0023] Figure 3 This is a schematic diagram of the power transmission structure used for gearbox bench testing according to Embodiment 2 of this utility model.

[0024] Figure 4 This is a schematic diagram of the power transmission structure used for gearbox bench testing in Embodiment 3 of this utility model. Detailed Implementation

[0025] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and specific examples.

[0026] Example 1:

[0027] Reference Figure 2 The power transmission structure shown for gearbox bench testing has a hollow internal structure for the power transmission transition spline sleeve 20. In the figure, the key teeth of the inner spline (first inner spline) on the left end of the transition spline sleeve match the key teeth of the outer spline of the gearbox transmission input spline 10, and the key teeth of the inner spline (second inner spline) on the right end of the transition spline sleeve match the key teeth of the outer spline of the bench end input spline 30. The interior of the transition spline sleeve is a through hole, that is, there is a gap 21 between the ends of the gearbox transmission input spline 10 and the bench end input spline 30. The bench end input spline 30 is connected to the bench input shaft or machined into an integral structure.

[0028] In this structure, the power transmission transition spline sleeve 20 and the bench end input spline 30 are independent of each other. Since the transition spline sleeve is engaged with the input splines at both ends respectively, even if the spline shaft axes of the splines at both ends do not coincide and there is a certain deviation, the influence of this structure on the power transmission will be reduced or adaptive, thereby realizing the automatic adjustment of the coaxiality error between the gearbox drive shaft and the bench drive shaft within a certain range.

[0029] Example 2:

[0030] Reference Figure 3 The power transmission structure shown for gearbox bench testing differs from that in Embodiment 1 in that the power transmission transition spline sleeve 50 in this embodiment has a stepped hole 52 inside. The left and right stepped surfaces 512 and 511 of the inwardly protruding step 51 contact the ends of the gearbox transmission input spline 10 and the bench end input spline 30, respectively. This prevents interference or collision between the left end face of the power transmission transition spline sleeve 50 and adjacent gearbox components caused by axial displacement (running) during power transmission.

[0031] Example 3:

[0032] Reference Figure 4The power transmission structure shown for the gearbox bench test, unlike embodiment 1, the power transmission transition spline sleeve 40 in this embodiment is not connected left and right, and a plug 41 is arranged in the middle, and a certain width gap (distance) 42 is arranged between the end face 412 of the left side of the plug 41 and the right side end face of the gearbox transmission input spline 10; and a certain width gap (distance) 43 is also arranged between the end face 411 of the right side of the plug 41 and the left side end face of the bench end input spline 30. Because a certain distance is arranged between the two ends of the plug and the spline end, the axial movement of the related parts within a certain range and the movement range thereof during power transmission can be limited.

[0033] The utility model discloses the structure, discard the power transmission input gearbox of the existing test structure adopts the power transmission on the bench, and the power transmission through the spline shaft sleeve directly combines the transmission of the gearbox spline shaft, but through the transition transmission spline sleeve that increases an intermediate, connects the transmission of the gearbox spline shaft with the bench through the transition transmission spline sleeve, utilizes the combined gap of two spline shafts and realizes the floating connection, to realize the coaxiality error of the automatic adjustment of the gearbox transmission shaft and the bench transmission shaft within a certain range, and the design can allow certain angle or radial deviation compensation (such as the transition spline sleeve adopts the elastic spline sleeve structure), can relieve the stress concentration of the misalignment of installation. On the bearing capacity, the load is evenly distributed through the spline shaft and the spline sleeve between the multiple teeth contact, especially suitable for large torque transmission, and the design can combine the interference fit of the spline sleeve and the transmission input spline of the gearbox to enhance the rigidity. The transmission structure of the utility model occupies less radial space, is suitable for compact design, especially when the axial installation space is insufficient (such as the direct flange connection of motor and equipment).

[0034] The utility model discloses the power transmission transition spline sleeve that increases, connects the transmission through the transition transmission spline sleeve and the gearbox spline shaft, utilizes the combined gap floating connection of the transmission input spline and the input shaft of the gearbox, and the coaxiality error of the automatic adjustment of the gearbox transmission shaft and the bench transmission shaft, which greatly reduces the operation condition that needs to be adjusted to very high precision in the prior art.

[0035] In addition, the length requirement of the power transmission transition spline sleeve, the clearance of the combination surface of the prototype (referring to the gearbox) to the bench input shaft is preferably not less than 2mm, and it is appropriate that the transition spline sleeve does not top the bench transmission output spline base to affect the test operation.

Claims

1. A power transmission structure for gearbox bench testing, characterized in that, It includes a power transmission transition spline sleeve, wherein one end of the sleeve body is provided with a first internal spline that can mate with the external spline of the gearbox transmission input spline, and the other end of the sleeve body is provided with a second internal spline that can mate with the external spline of the test bench input spline. The test bench input spline is connected to the test bench input shaft.

2. The power transmission structure for gearbox bench testing according to claim 1, characterized in that, The inside of the power transmission transition spline sleeve is a through hole.

3. The power transmission structure for gearbox bench testing according to claim 2, characterized in that, The through hole is a stepped hole that is narrow in the middle and wide on both sides.

4. The power transmission structure for gearbox bench testing according to claim 3, characterized in that, Along the axial direction, the stepped surfaces on both sides of the stepped hole abut against the end faces of the corresponding ends of the gearbox transmission input spline and the bench end input spline, respectively.

5. The power transmission structure for gearbox bench testing according to claim 1, characterized in that, A plug is provided in the middle of the inner part of the power transmission transition spline sleeve.

6. The power transmission structure for gearbox bench testing according to claim 5, characterized in that, Along the axial direction, the two ends of the plug are respectively provided with gaps between the end faces of the corresponding ends of the gearbox transmission input spline and the bench end input spline.

7. The power transmission structure for gearbox bench testing according to claim 1, characterized in that, The power transmission transition spline sleeve is an elastic spline sleeve.

8. The power transmission structure for gearbox bench testing according to claim 1, characterized in that, The inner spline of the power transmission transition spline sleeve is interference-fitted with the outer spline of the gearbox transmission input spline.

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