Front hydraulic power transmission mechanism of full-frame tractor

Abstract

A front hydraulic power transmission mechanism of a full-frame tractor comprises an engine, a power transmission case shell and a hydraulic power transmission mechanism, the engine is fixedly mounted at the front end of a frame of the tractor, and an engine flywheel shell is arranged at the rear end of the engine; the power transmission case shell is fixedly installed on an engine flywheel shell, a transmission shaft is arranged in the power transmission case shell, the front end of the transmission shaft is in power connection with an engine flywheel, and the rear end of the transmission shaft is connected with the input end of the gearbox through a universal joint transmission shaft. The hydraulic power transmission mechanism is installed in the power transmission box shell and comprises a hydraulic oil pump, a driven gear and a driving gear, a pump shaft of the hydraulic oil pump is in power connection with the driven gear, the driven gear is meshed with the driving gear, and the driving gear is in power connection with the middle section of the transmission shaft. The gearbox structure is simplified, and disassembly and maintenance are more convenient; and meanwhile, the power is directly taken from the engine, so that the load of the gearbox is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to full frame type tractor technical field especially relates to a full frame type tractor front mounted hydraulic power transmission mechanism. BACKGROUND

[0002] At present, the existing full frame type tractor adopts the gearbox directly fixed on the flywheel housing of the engine, and forms a rigid whole with the engine. That is to say, the engine and the gearbox are in the whole housing. Based on this existing structure, the hydraulic power take-off point can only be arranged at the rear end of the gearbox body, and the gear shaft of the hydraulic oil pump can only be connected with the output shaft in the gearbox body (as shown in the figure). This structure makes the originally complicated gearbox structure further complicated, and it is very inconvenient to disassemble and maintain. At the same time, the gearbox provides power for front wheel drive, rear wheel drive and rear power output box, and the hydraulic oil pump takes power from the gearbox, which will inevitably increase the load of the gearbox. Figure 1 UTILITY MODEL CONTENTS

[0003] In order to overcome the defects of the prior art pointed out above, the present inventors have made in-depth research and, after a lot of creative labor, completed the utility model.

[0004] Specifically, the technical problem to be solved by the utility model is to provide a full frame type tractor front mounted hydraulic power transmission mechanism to solve the technical problems of complicated structure and increased load of the gearbox caused by the fact that the hydraulic power can only be taken from the gearbox body.

[0005] To solve the above technical problems, the utility model provides the following technical scheme:

[0006] A full frame type tractor front mounted hydraulic power transmission mechanism, comprising

[0007] An engine, which is fixedly installed at the front end of the frame of the tractor, and has a flywheel housing at the rear end;

[0008] A power transmission box housing, which is fixedly installed on the flywheel housing of the engine, and has a transmission shaft arranged therein, the front end of the transmission shaft being connected with the flywheel of the engine, and the rear end of the transmission shaft being connected with the input end of the gearbox through a universal joint transmission shaft;

[0009] And a hydraulic power transmission mechanism, which is installed in the power transmission box housing, and comprises a hydraulic oil pump, a driven gear and a driving gear, the pump shaft of the hydraulic oil pump being connected with the driven gear, the driven gear being engaged with the driving gear, and the driving gear being connected with the middle section of the transmission shaft. ​

[0010] As an improved technical solution, the edge of the power transmission box shell and the engine flywheel shell is integrally formed with a mounting boss, and the power transmission box shell and the engine flywheel shell are bolted and connected by using the mounting boss.

[0011] As an improved technical solution, the front end of the transmission shaft is connected to the engine flywheel through a clutch or a torsional damper.

[0012] As an improved technical solution, the end of the transmission shaft is provided with a connecting flange for mounting a universal joint transmission shaft.

[0013] As an improved technical solution, the hydraulic oil pump, the driven gear and the driving gear are provided in two sets and symmetrically distributed on both sides of the transmission shaft.

[0014] As an improved technical solution, the middle section of the transmission shaft is provided with a spline, and the spline is used for power connection with the driving gear.

[0015] As an improved technical solution, the hydraulic oil pump is fixedly installed on the power transmission box shell by bolts.

[0016] After the above technical solution is adopted, the beneficial effects of the present application are as follows:

[0017] The present application first changes the traditional engine and transmission integrated rigid overall structure, connects the engine and the transmission by using a universal joint transmission shaft, and on this basis, directly installs the power transmission box shell on the engine flywheel shell, and then installs the hydraulic power transmission mechanism in the power transmission box shell. This structure simplifies the transmission structure and is more convenient to disassemble and maintain. At the same time, the hydraulic power transmission mechanism directly takes power from the engine, reducing the load of the transmission. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. Among them:

[0019] Figure 1 It is the prior art structure schematic diagram of the hydraulic power transmission mechanism of the full-frame tractor of the present application.

[0020] Figure 2 It is the overall structure schematic diagram of the front-mounted hydraulic power transmission mechanism of the full-frame tractor of the present application.

[0021] Figure 3 The utility model discloses full-frame tractor front-mounted hydraulic power transmission mechanism's Figure 2 The enlarged structural schematic diagram of A in the middle.

[0022] Figure 4 It is the structural schematic diagram of hydraulic power transmission mechanism;

[0023] The figure mark explanation is as follows:

[0024] In the drawing: engine 1, power transmission case 2, hydraulic power transmission mechanism 3, frame 4, engine flywheel case 5, transmission shaft 6, engine flywheel 7, universal joint transmission shaft 8, gearbox 9, hydraulic oil pump 10, driven gear 11, driving gear 12, connecting flange 13, rear drive axle 14, front drive axle 15, rear power output case 16. Specific embodiments

[0025] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0026] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications will also change accordingly.

[0027] Meanwhile, "and / or" or "and / or" appearing in the whole text means that three schemes are included, taking "A and / or B" as an example, including A scheme, or B scheme, or A and B schemes are satisfied at the same time.

[0028] In addition, the description of "first", "second" and the like in the utility model is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one feature. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, also not within the protection scope required by the utility model.

[0029] Refer to Figures 2-3The utility model provides a full frame type tractor front-mounted hydraulic power transmission mechanism, including engine 1, power transmission case shell 2 and hydraulic power transmission mechanism 3, the engine 1 is fixedly installed at the front end of the frame 4 of tractor, and the rear end of the engine is provided with engine flywheel housing 5, the power transmission case shell 2 is fixedly installed on the engine flywheel housing 5, and the power transmission case shell 2 is provided with transmission shaft 6, the front end of the transmission shaft 6 is connected with the engine flywheel 7 power, and the rear end of the transmission shaft 6 is connected with the input end of speed changer 9 by universal joint transmission shaft 8, the hydraulic power transmission mechanism 3 is installed in the power transmission case shell 2, including hydraulic oil pump 10, passive gear 11 and driving gear 12, the pump shaft of the hydraulic oil pump 10 is connected with the passive gear 11 power, the passive gear is engaged with the driving gear, and the driving gear is connected with the middle section of the transmission shaft 6 power, specifically, the middle section of the transmission shaft is provided with spline, and is connected with the driving gear power by spline, in the embodiment, hydraulic oil pump, passive gear and driving gear are provided with two sets, and are symmetrically distributed on both sides of the transmission shaft, and the hydraulic oil pump is fixedly installed on the power transmission case shell by bolt.

[0030] In the embodiment, the edges of the power transmission case shell 2 and the engine flywheel housing 5 are integrally formed with mounting bosses 12, and the power transmission case shell 2 and the engine flywheel housing 5 are bolted and connected by the mounting bosses 12.

[0031] In the embodiment, the front end of the transmission shaft 6 is connected to the engine flywheel 7 through a clutch or a torsional damper, and the end of the transmission shaft 6 is provided with a connecting flange 13 for installing a universal joint transmission shaft.

[0032] Meanwhile, in the utility model, the speed changer 9 is provided with a rear drive axle 14 and a front drive axle 15 through the universal joint transmission shaft. The rear end of the speed changer 9 is provided with a rear power output case 16 through the universal joint transmission shaft.

[0033] From Figure 1 It can be seen that the embodiment is obviously different from the traditional speed changer which is directly fixed on the flywheel housing of the engine and forms a rigid integral structure with the engine. Instead, the engine and the speed changer are connected by the universal joint transmission shaft, and on this basis, the power transmission case shell is directly installed on the engine flywheel housing, and the hydraulic power transmission mechanism is installed in the power transmission case shell. This structure simplifies the structure of the speed changer and makes disassembly and maintenance more convenient. Meanwhile, the hydraulic power transmission mechanism directly takes power from the engine, reducing the load of the speed changer.

[0034] It should be understood that the use of these embodiments is by way of illustration only and is not intended to limit the scope of the present application. In addition, it should also be understood that, after reading the technical content of the present application, those skilled in the art can make various modifications, modifications and / or variations to the present application, and all of these equivalent forms also fall within the protection scope defined by the claims attached to the present application.

Claims

1. A front-mounted hydraulic power transmission mechanism for a full-frame tractor, comprising An engine, wherein the engine is fixedly mounted on the front end of the tractor frame, and an engine flywheel housing is provided on the rear end of the engine; It is characterized in that Also includes A power transmission case housing, the power transmission case housing being fixedly mounted on the engine flywheel housing, and a transmission shaft being disposed within the power transmission case housing, the front end of the transmission shaft being dynamically connected to the engine flywheel, and the rear end of the transmission shaft being connected to the input end of the gearbox via a universal joint transmission shaft; And a hydraulic power transmission mechanism, which is installed in the power transmission box housing and includes a hydraulic oil pump, a passive gear and a driving gear. The pump shaft of the hydraulic oil pump is dynamically connected to the passive gear, the passive gear is meshed with the driving gear, and the driving gear is dynamically connected to the middle section of the transmission shaft.

2. A front-mounted hydraulic power transmission mechanism for a full-frame tractor according to claim 1, characterized in that: The edges of the power transmission case housing and the engine flywheel housing are both integrally formed with mounting bosses, and the power transmission case housing and the engine flywheel housing are fixedly connected by bolts using the mounting bosses.

3. The front-mounted hydraulic power transmission mechanism for a full-frame tractor according to claim 1, characterized in that: The front end of the transmission shaft is connected to the engine flywheel through a clutch or a torsional vibration damper.

4. A front-mounted hydraulic power transmission mechanism for a full-frame tractor according to claim 3, characterized in that: The end of the transmission shaft is provided with a connecting flange for mounting a universal joint transmission shaft.

5. The front-mounted hydraulic power transmission mechanism for a full-frame tractor according to claim 1, characterized in that: The hydraulic oil pump, the driven gear and the driving gear are provided in two sets and are symmetrically distributed on both sides of the transmission shaft.

6. A front-mounted hydraulic power transmission mechanism for a full-frame tractor according to claim 5, characterized in that: The middle section of the transmission shaft is provided with a spline, which is used to connect the transmission shaft to the driving gear.

7. A front-mounted hydraulic power transmission mechanism for a full-frame tractor according to claim 6, characterized in that: The hydraulic oil pump is fixedly mounted on the power transmission case housing by means of bolts.

Images