Rapid PTO speed measuring device for tractor

Abstract

The utility model discloses a quick PTO speed measuring device for a tractor. The quick PTO speed measuring device comprises an encoder, a mounting seat assembly and a PTO flange assembly, the mounting seat assembly comprises a fixing sleeve and a mounting seat inserted in the fixing sleeve in a penetrating manner, the encoder shell is fixed on the fixing sleeve, the encoder hollow shaft is fixed on the mounting seat, the cylindrical surface end of the PTO flange assembly is fixed on the mounting seat assembly through a pull ring knob plunger, and the other end of the PTO flange assembly is sleeved on a tractor PTO through a spline coupling. And the PTO flange assembly is positioned and locked through a positioning pin in a positioning hole of the PTO flange assembly. The speed measurement device can effectively reduce the influence of environmental factors and human factors on test data, improves the reliability of measurement results, is simple in overall structure and convenient to mount and dismount, and has practical significance and good application prospects.

Description

Technical Field

[0001] The utility model belongs to the technical field of tractor complete machine testing equipment, and in particular relates to a fast PTO speed measuring device for a tractor. Background Art

[0002] In the performance research of tractors, PTO speed is an indispensable test data. At present, there are many ways to measure the speed of tractor PTO. For example, the tractor under test is connected to the tractor power output shaft power test bench for testing to obtain PTO speed test data. This test method consumes a lot of manpower and time, and the test cost is high. For another example, a piece of reflective paper is attached to the PTO of the tractor under test, and then the speed is measured with a handheld photoelectric tachometer. This test method has a low cost, but the test data is greatly affected by environmental factors on the one hand, and by human factors on the other hand. The error of the test results is large and the accuracy is low. Moreover, this test method requires the test personnel to be close to the high-speed rotating PTO, which has certain safety hazards and is difficult to meet the test requirements.

[0003] At present, there is no speed measuring device suitable for tractor PTO speed measurement in China that is convenient, fast and can ensure test accuracy. Utility Model Content

[0004] In order to solve the above problems, the utility model proposes a fast PTO speed measuring device for a tractor. The speed measuring device can effectively reduce the influence of environmental factors and human factors on the test data, improve the reliability of the measurement results, and the overall structure of the device is simple and easy to install and disassemble. That is, it has the characteristics of high reliability of measurement results, low cost, simple structure, and easy installation and disassembly, and has practical significance and good application prospects.

[0005] The utility model is realized by the following technical solutions:

[0006] A fast PTO speed measuring device for a tractor, comprising an encoder, a mounting seat assembly, and a PTO flange assembly;

[0007] The mounting seat assembly includes a fixing sleeve and a mounting seat inserted through the fixing sleeve. The encoder housing is fixed on the fixing sleeve, and the encoder hollow shaft is fixed on the mounting seat. The cylindrical end of the PTO flange assembly is fixed on the mounting seat assembly, and the other end is sleeved on the tractor PTO through a spline connection, and is positioned and locked by a locating pin in the locating hole of the PTO flange assembly.

[0008] Furthermore, the mounting seat assembly also includes a shaft elastic retaining ring I, a hole elastic retaining ring, a deep groove ball bearing, a pull ring knob plunger;

[0009] The deep groove ball bearing is coaxial with the mounting seat in the horizontal direction and is installed inside the fixed sleeve. The shaft is installed in the shaft groove on the mounting seat with an elastic retaining ring I, and the hole is installed in the hole groove on the fixed sleeve. The cylindrical end of the PTO flange assembly is fixed to the mounting seat assembly through a pull ring knob plunger, and the pull ring knob plunger is screwed on the threaded hole of the mounting seat by means of threads.

[0010] Further, the PTO flange assembly includes a PTO output flange, a positioning pin, a pressure spring, and a shaft elastic retaining ring II;

[0011] The cylindrical end of the PTO output flange is fixed to the mounting seat assembly through a pull ring knob plunger, and two locating holes are symmetrically distributed on the other end. The pressure spring and the locating pin are installed in sequence from the side with the larger opening of the locating hole. The shaft elastic retaining ring II is installed in the shaft groove of the locating pin extending out of the side with the smaller opening of the locating hole. The device is installed on the tractor PTO through two locating pins.

[0012] Furthermore, the encoder housing is fixed to the fixing sleeve by two symmetrically distributed cross head screws.

[0013] Furthermore, the hollow shaft of the encoder is fixed to the mounting seat by two hexagon socket set screws which are vertically distributed to each other.

[0014] The beneficial effects of the utility model are:

[0015] (1) Compared with other measurement methods, this PTO speed measuring device is fixed on the tractor PTO by two positioning pins, which can be easily and quickly installed and disassembled on site, and is not restricted by on-site test conditions, thus saving time, manpower and other costs to a great extent;

[0016] (2) The device is rigidly connected to the tractor PTO through a positioning pin, and the PTO speed is directly measured by the encoder, which makes the measurement result more accurate and improves the authenticity of the test data;

[0017] In summary, the speed measuring device has the characteristics of high reliability of measurement results, low cost, simple structure, and easy installation and disassembly. It can be used in tractor performance research to quickly measure the speed of PTO in various occasions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a fast PTO speed measuring device for a tractor according to the utility model;

[0019] Figure 2 It is a schematic structural cross-sectional diagram of a fast PTO speed measuring device for a tractor according to the utility model;

[0020] Figure 3It is a schematic structural cross-sectional view of a mounting seat assembly of a fast PTO speed measuring device for a tractor according to the utility model;

[0021] Figure 4 It is a schematic structural cross-sectional view of a PTO flange assembly of a fast PTO speed measuring device for a tractor according to the utility model;

[0022] Figure numerals: 1. encoder; 2. mounting seat assembly; 3. PTO flange assembly; 4. mounting seat; 5. elastic retaining ring I for shaft; 6. elastic retaining ring for hole; 7. deep groove ball bearing; 8. fixing sleeve; 9. pull ring knob plunger; 10. PTO flange; 11. locating pin; 12. pressure spring; 13. elastic retaining ring II for shaft. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solution in the embodiments of the present utility model will be clearly and completely described below according to the accompanying drawings.

[0024] Embodiment 1:

[0025] As shown in the accompanying drawings, a fast PTO speed measuring device for a tractor includes an encoder 1, a mounting seat assembly 2, and a PTO flange assembly 3;

[0026] The mounting seat assembly 2 includes a fixing sleeve 8 and a mounting seat 4 inserted through the fixing sleeve 8. The encoder 1 housing is fixed to the fixing sleeve 8 by two symmetrically distributed cross head screws, and the hollow shaft of the encoder 1 is fixed to the mounting seat 4 by two mutually perpendicularly distributed hexagon socket set screws. The cylindrical end of the PTO flange assembly 3 is fixed to the mounting seat assembly 2 by a pull ring knob plunger 9, and the other end is sleeved on the tractor PTO through a spline joint, and is positioned and locked by a positioning pin 11 in the positioning hole of the PTO flange assembly 3. During the test, the tractor PTO speed is sequentially transmitted through the PTO flange assembly 3 and the mounting seat assembly 2 for encoder 3 to collect.

[0027] The mounting seat assembly 2 also includes a shaft elastic retaining ring I5, a hole elastic retaining ring 6, a deep groove ball bearing 7, and a pull ring knob plunger 9;

[0028] The deep groove ball bearing 7 is coaxial with the mounting seat 4 in the horizontal direction and is installed inside the fixed sleeve 8, so as to realize the same speed of the encoder 1 and the mounting seat 4; the shaft elastic retaining ring I5 is installed in the shaft groove on the mounting seat 4, so as to prevent the deep groove ball bearing 7 from axial movement during the rotation of the mounting seat 4; the hole elastic retaining ring 6 is installed in the hole groove on the fixed sleeve 8, so as to limit the relative position of the deep groove ball bearing 7 and the fixed sleeve 8; the cylindrical end of the PTO flange assembly 3 is fixed to the mounting seat assembly 2 by a pull ring knob plunger 9, and the pull ring knob plunger 9 is screwed on the threaded hole of the mounting seat 4 by means of a thread, so as to fix the relative position of the mounting seat 4 and the PTO flange 10, so as to ensure that the two have the same rotation speed.

[0029] The PTO flange assembly 3 includes a PTO output flange 10, a positioning pin 11, a pressure spring 12, and a shaft elastic retaining ring II 13;

[0030] The cylindrical end of the PTO output flange 10 is fixed on the mounting seat assembly 2 through the pull ring knob plunger 9, and two positioning holes are symmetrically distributed on the other end. The opening of one side of the positioning hole is larger, and the opening of the other side is smaller, that is, the apertures at both ends are inconsistent. The pressure spring 12 and the positioning pin 11 are installed in sequence from the side with the larger opening of the positioning hole. The shaft elastic retaining ring II 13 is installed in the shaft groove of the part of the positioning pin 11 extending out of the side with the smaller opening of the positioning hole to prevent the positioning pin 11 from falling off; the device is installed on the tractor PTO through the two positioning pins 11. When connecting with the tractor PTO, it is only necessary to press the two positioning pins 11 so that the larger diameter part of the shaft is offset from the tractor PTO, and it can be easily connected; loosen the positioning pin 11, it rebounds under the action of the pressure spring 12, so that the larger diameter part of the shaft limits the relative movement of the PTO output flange 10 on the tractor PTO.

[0031] The utility model fully considers the cost problem of measuring the speed of PTO in the study of tractor driving performance and the influence of environmental and human factors on the test results, making the speed measurement of PTO more economical and reasonable, and the test data more real and reliable. The device has a simple structure, convenient installation and disassembly, low processing and use costs, high reliability of measurement results, and is not restricted by field test conditions when used. It has practical significance and good application prospects.

[0032] It should be noted that although the utility model is described through the above embodiments, the utility model can also have other multiple embodiments. Without departing from the spirit and scope of the utility model, it is obvious that those skilled in the art can make various corresponding changes and deformations to the utility model, but these changes and deformations should all fall within the scope of protection of the attached claims of the utility model and their equivalents.

Claims

1. A fast PTO speed measuring device for a tractor, characterized in that: It includes an encoder (1), a mounting base assembly (2), and a PTO flange assembly (3); The mounting seat assembly (2) comprises a fixing sleeve (8) and a mounting seat (4) inserted through the fixing sleeve (8); the housing of the encoder (1) is fixed on the fixing sleeve (8), and the hollow shaft of the encoder (1) is fixed on the mounting seat (4); the cylindrical end of the PTO flange assembly (3) is fixed on the mounting seat assembly (2), and the other end is sleeved on the tractor PTO through a spline connection and is positioned and locked by a positioning pin (11) in a positioning hole of the PTO flange assembly (3).

2. A fast PTO speed measuring device for a tractor according to claim 1, characterized in that: The mounting seat assembly (2) further comprises a shaft elastic retaining ring I (5), a hole elastic retaining ring (6), a deep groove ball bearing (7), and a pull ring knob plunger (9); The deep groove ball bearing (7) is coaxial with the mounting seat (4) in the horizontal direction and is installed inside the fixing sleeve (8); the shaft elastic retaining ring I (5) is installed in the shaft groove on the mounting seat (4); the hole elastic retaining ring (6) is installed in the hole groove on the fixing sleeve (8); the cylindrical end of the PTO flange assembly (3) is fixed to the mounting seat assembly (2) through a pull ring knob plunger (9), and the pull ring knob plunger (9) is screwed onto the threaded hole of the mounting seat (4) by means of a thread.

3. A fast PTO speed measuring device for a tractor according to claim 1, characterized in that: The PTO flange assembly (3) comprises a PTO output flange (10), a positioning pin (11), a pressure spring (12), and a shaft elastic retaining ring II (13); The cylindrical end of the PTO output flange (10) is fixed to the mounting seat assembly (2) through a pull ring knob plunger (9), and the other end is symmetrically provided with two positioning holes. The pressure spring (12) and the positioning pin (11) are sequentially installed from the side with the larger opening of the positioning hole. The shaft elastic retaining ring II (13) is installed in the shaft groove of the part of the positioning pin (11) extending out of the side with the smaller opening of the positioning hole. The device is installed on the tractor PTO through the two positioning pins (11).

4. A fast PTO speed measuring device for a tractor according to claim 1, characterized in that: The encoder (1) housing is fixed to the fixing sleeve (8) by means of two symmetrically distributed cross head screws.

5. A fast PTO speed measuring device for a tractor according to claim 1, characterized in that: The hollow shaft of the encoder (1) is fixed to the mounting seat (4) by two hexagon socket set screws that are arranged perpendicular to each other.

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