Multipurpose power takeoff

Abstract

The invention relates to the technical field of transmission, and discloses a multipurpose power takeoff which comprises a shell, an output shaft and two output bearings, the output shaft is installed on the shell through the two output bearings, two sets of detection holes are formed in the outer wall of the shell, the two sets of detection holes correspond to the two output bearings respectively, and the two output bearings are arranged in the shell. A first detection rod is movably sealed on the inner wall of the detection hole, one end of the first detection rod is located in the shell and aligned with the inner ring of the output bearing, the other end of the first detection rod is located outside the detection groove, and the multipurpose power takeoff further comprises two connecting rings. The multifunctional power takeoff detection device has the following advantages and effects that the axial clearance of the output bearing is detected through the first detection rod, whether the axial clearance of the output bearing is within the qualified range or not is judged, the reset spring is detected through the second detection rod, whether the reset spring is degraded or not is judged, and the multifunctional power takeoff does not need to be disassembled during regular inspection; workers can check conveniently, faults can be pre-judged in advance, the faults are reduced, and the working stability is improved.

Description

Technical Field

[0001] The present invention relates to the field of transmission technology, in particular to a multi-purpose power take-off. Background Art

[0002] A power take-off is a device installed on a special-purpose vehicle, used to divert the power of the power source to other actuators. Depending on the purpose of use, the structural form and type of the power take-off are different. Its main structure includes transmission gears, shafts, and related housings. Its power source is generally the engine of a special-purpose vehicle. With the continuous development and progress of technology, the technology of the power take-off itself is relatively mature, and it can adapt to different rated speeds, rated powers, and output interface conditions according to different upper-mounted equipment. However, after long-term use, the internal components of the power take-off are aged and degraded. This information cannot be obtained before the power take-off fails. Once a failure occurs during the operation of the power take-off, it will affect the normal operation of the upper-mounted equipment, and even cause an accident in serious cases. For example, the power output shaft is generally installed on the housing through a bearing. Before installation, the bearing clearance can be tested to ensure that it is within the qualified range. However, during long-term use, when the bearing clearance changes beyond the qualified range, the maintenance personnel can only disassemble and decompose the power take-off for testing to learn about the changes in the bearing axial clearance, which is very cumbersome. Summary of the invention

[0003] The purpose of the present invention is to provide a multi-purpose power take-off, which has the effect of conveniently detecting the output shaft bearing clearance and avoiding failures.

[0004] The above technical purpose of the present invention is achieved through the following technical solutions: a multi-purpose power take-off, comprising a shell, an output shaft, and two output bearings, the output shaft is installed on the shell through the two output bearings, the outer wall of the shell is provided with two groups of detection holes, the two groups of detection holes correspond to the two output bearings respectively, the inner wall of the detection hole is movably sealed with a detection rod 1, one end of the detection rod 1 is located in the shell and aligned with the inner ring of the output bearing, and the other end of the detection rod 1 is located outside the detection groove, the multi-purpose power take-off also includes two connecting rings, the detection rods 1 in the two groups of detection holes correspond to the two connecting rings respectively, and the detection rod 1 is fixed to the corresponding connecting ring.

[0005] By adopting the above technical solution, the detection rod 1 is pressed to push the inner ring of the bearing to move. The moving distance of the detection rod 1 reflects the axial clearance of the output bearing, so it can be judged whether the axial clearance of the output bearing is in a qualified state. During regular inspections, it is possible to judge whether the axial clearance of the output bearing is qualified without disassembling the multi-purpose power take-off.

[0006] The present invention is further configured as follows: a locking nut is threadedly connected to the detection rod.

[0007] By adopting the above technical solution, the locking nut is rotated to make it close to the housing, and the position of the detection rod 1 is fixed, so that the detection rod 1 will not interfere with the output bearing during the normal operation of the multi-purpose power take-off. The locking nut is rotated to make it leave the outer wall of the housing, and the detection rod 1 can be moved to detect the axial clearance of the output bearing.

[0008] The present invention is further configured as follows: an indicator rod is fixed to the outer wall of the shell, a scale is arranged on the indicator rod, an observation piece is fixed to the detection rod, and the observation piece faces the scale on the indicator rod.

[0009] By adopting the above technical solution, the movement of the detection rod drives the observation piece to move, and the observation piece faces the indicator rod, which is convenient for the staff to visually observe the moving distance of the observation piece.

[0010] The present invention is further configured as follows: the output bearing is a deep groove ball bearing.

[0011] The present invention is further configured as follows: it also includes an operating mechanism, which includes a cylinder, an operating rod, a pin shaft, and a sliding sleeve. The output shaft is provided with an output gear, and the output gear is installed on the output shaft through a needle bearing. The cylinder piston is in contact with the operating rod, and the operating rod is connected to the sliding sleeve through the pin shaft. A spline is fixed on the inner wall of the sliding sleeve, and a first spline groove is fixed on the output shaft. The sliding sleeve is sleeved on the output shaft, and the spline is embedded in the first spline groove. A step is provided at the end of the output gear, and the step is provided with a second spline groove. After the cylinder piston rod is extended, the operating rod is driven to move so as to embed the spline in the sliding sleeve into the second spline groove.

[0012] By adopting the above technical solution, the spline on the sleeve is embedded in the first spline groove of the output shaft, and is not embedded in the spline groove of the output gear step. Since the output gear is mounted on the output shaft through a needle bearing, when the output gear rotates, the rotation of the output gear does not directly drive the output shaft to rotate, and there is no power output.

[0013] The cylinder piston extends and pushes the operating lever to move. The operating lever drives the sleeve to move through the pin shaft. The spline on the sleeve is embedded in the second spline groove of the output gear step. At this time, the spline on the sleeve is embedded in the first spline groove and the second spline groove at the same time. The rotation of the output gear drives the sleeve to rotate, and the sleeve drives the output shaft to rotate to realize power output.

[0014] The present invention is further configured as follows: an accommodating cavity is provided in the output shaft, the operating rod extends into the accommodating cavity, a return spring is provided in the accommodating cavity, the return spring is against the end of the operating rod away from the cylinder, and after the cylinder piston rod retracts, the return spring force drives the operating rod to move to disengage the spline in the sleeve from the second spline groove.

[0015] By adopting the above technical solution, the joystick and the output shaft are relatively fixed in the circumferential direction of the output shaft. When the output shaft rotates and power is output, the joystick itself rotates, so the cylinder piston is just attached to the joystick. When the cylinder piston extends, it can push the joystick to move, and when the cylinder piston retracts, it cannot drive the joystick to reset. Therefore, the present invention provides a reset spring, and when the cylinder piston retracts, the elastic force of the reset spring drives the joystick to reset.

[0016] The present invention is further configured as follows: a movable hole is provided on the side wall of the accommodating cavity, and the pin shaft passes through the movable hole and is fixed on the sliding sleeve.

[0017] By adopting the above technical solution, one end of the movable hole is located on the side wall of the accommodating groove, and the other end opening is located at the spline groove of the output shaft. A movable gap is formed between the inner wall of the movable hole and the outer wall of the pin shaft. During the axial movement of the operating lever along the output shaft, the pin shaft is driven to move axially along the output shaft. The movable gap provides space for the axial movement of the pin shaft.

[0018] The present invention is further configured as follows: a slider is slidably connected in the accommodating cavity, one end of the return spring away from the joystick is fixed on the slider, one end of the output shaft is provided with a detection slot, a detection rod 2 is movably sealed on the output shaft, one end of the detection rod 2 is against the slider, and the other end is located in the detection slot.

[0019] By adopting the above technical solution, once the reset spring deteriorates, the joystick cannot be reset and the multi-purpose power take-off cannot disconnect the power output. Since the reset spring is installed in the accommodating cavity, it is generally necessary to disassemble the multi-purpose power take-off for regular maintenance, which is very cumbersome. The present invention is equipped with a slider and a detection rod 2. The staff uses a pressure sensor to press the detection rod 2 to move the detection rod 2 a preset distance. At this time, the pressure value of the pressure sensor is observed. By comparing the pressure value with the preset pressure range, it can be determined whether the spring is deteriorated.

[0020] The present invention is further configured as follows: the detection notch is threadedly connected with a plug.

[0021] By adopting the above technical solution, the plug seals the detection notch.

[0022] The present invention is further configured as follows: it also includes a mounting shaft and two mounting bearings, and the mounting shaft is mounted on the housing through the two mounting bearings.

[0023] The beneficial effects of the present invention are as follows: the present invention detects the axial clearance of the output bearing through a detection rod pair to determine whether the axial clearance of the output bearing is within an acceptable range, and detects the reset spring through a detection rod pair to determine whether the reset spring is deteriorated. There is no need to disassemble the multi-purpose power take-off during regular inspections, which facilitates inspections by staff, enables prediction of faults in advance, reduces faults, and improves working stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 The structure of the present invention is schematically shown in FIG. Figure 1 .

[0026] Figure 2 The structure of the present invention is schematically shown in FIG. Figure 2 .

[0027] Figure 3 yes Figure 2 Enlarged view of point A.

[0028] Figure 4 It is a schematic diagram of the positional relationship among the input gear, the mounting shaft, the output gear, and the output shaft of the present invention.

[0029] Figure 5 It is a schematic diagram of the structure of the operating mechanism of the present invention.

[0030] Figure 6 It is a schematic diagram of the positional relationship among the accommodating cavity, the movable hole and the detection notch of the output shaft of the present invention.

[0031] Figure 7 This is a schematic diagram of the positional relationship between the sliding sleeve and the output shaft of the present invention.

[0032] Figure 8 The exploded state of the sliding sleeve and the output shaft of the present invention is shown in FIG. Figure 1 .

[0033] Fig. 9 The exploded state of the sliding sleeve and the output shaft of the present invention is shown in FIG. Figure 2 .

[0034] In the figure, 1. housing; 11. detection hole; 2. output shaft; 21. output bearing; 22. accommodating chamber; 23. movable hole; 24. first spline groove; 25. detection notch; 3. output gear; 31. step; 32. second spline groove; 33. needle bearing; 4. mounting shaft; 5. input gear; 6. detection rod 1; 61. locking nut; 62. observation piece; 7. connecting ring; 8. indicator rod; 9. operating mechanism; 91. cylinder; 92. operating rod; 93. pin shaft; 94. sleeve; 941. spline; 95. reset spring; 96. slider; 97. detection rod 2; 98. plug. DETAILED DESCRIPTION

[0035] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] A multi-purpose power take-off includes a housing 1, a mounting shaft 4, an input gear 5, an output gear 3, and an output shaft 2. The mounting shaft 4 is mounted on the housing 1 through two mounting shaft 4 bearings, so that the mounting shaft 4 can rotate on the housing 1. The input gear 5 is mounted and fixed on the mounting shaft 4, the output gear 3 is meshed with the input gear 5, the output gear 3 is mounted on the output shaft 2 through a needle bearing 33, and the output shaft 2 bearing is a deep groove ball bearing, so that the output gear 3 can rotate relative to the output shaft 2. The output shaft 2 is mounted on the housing 1 through two output shaft 2 bearings, so that the output shaft 2 can rotate on the housing 1.

[0037] The multi-purpose power take-off device further comprises an operating mechanism 9, which comprises a cylinder 91, an operating rod 92, a pin 93, and a sleeve 94. The output shaft 2 is provided with a receiving chamber 22, and the receiving chamber 22 has an opening at one end of the output shaft 2. The operating rod 92 is inserted into the receiving chamber 22 from the opening, and the pin 93 is fixed on the operating rod 92 and arranged radially along the operating rod 92. The sleeve 94 is sleeved on the output shaft 2, and a movable hole 23 is provided on the side wall of the output shaft 2, and the movable hole 23 is connected with the receiving chamber 22, and one end of the movable hole 23 is located on the side wall of the receiving chamber 22. The pin 93 is fixed on the sleeve 94 after passing through the movable hole 23. A spline 941 is provided on the inner wall of the sleeve 94, and a first spline groove 24 is provided on the outer wall of the output shaft 2, and the spline 941 is embedded in the first spline groove 24. In the circumferential direction, the sleeve 94 is relatively fixed to the output shaft 2; in the axial direction, the sleeve 94 can slide relative to the output shaft 2. The output gear 3 is fixed with a step 31, and the step 31 is provided with a second spline groove 32. A return spring 95 is arranged in the accommodating chamber 22, one end of the operating rod 92 abuts against the piston of the cylinder 91, and the other end abuts against the return spring 95, and the return spring 95 acts on the operating rod 92 with elastic force, driving the operating rod 92 to always abut against the piston of the cylinder 91.

[0038] The operating principle of the operating mechanism 9 is as follows: the input gear 5 rotates after receiving force, driving the output gear 3 to rotate. Since the needle bearing 33 is installed between the output gear 3 and the output shaft 2, the output gear 3 cannot directly drive the output shaft 2 to rotate. At this time, the output shaft 2 has no power output. The piston of the cylinder 91 moves to drive the operating rod 92 to move axially, and the pin 93 on the operating rod 92 moves, and drives the sliding sleeve 94 to move, so that the sliding sleeve 94 is embedded in the second spline groove 32 on the step 31 of the output gear 3. At this time, the sliding sleeve 94 is embedded in the first spline groove 24 and the second spline groove 32 at the same time. The rotation of the output gear 3 drives the sliding sleeve 94 to rotate, and the sliding sleeve 94 drives the output shaft 2 and the operating rod 92 to rotate through the pin 93, so as to realize the power output of the output shaft 2.

[0039] The outer wall of the shell 1 is provided with two groups of detection holes 11, and the two groups of detection holes 11 correspond to the two output shaft 2 bearings respectively. The inner wall of the detection hole 11 is movably sealed with a detection rod 6, one end of the detection rod 6 is located in the shell 1 and aligned with the inner ring of the output shaft 2 bearing, and the other end of the detection rod 6 is located outside the detection groove. The multi-purpose power take-off also includes two connecting rings 7. The detection rods 6 in the two groups of detection holes 11 correspond to the two connecting rings 7 respectively, and the detection rods 6 are fixed to the corresponding connecting rings 7. A locking nut 61 is threadedly connected to the detection rod 6. An indicator rod 8 is fixed to the outer wall of the shell 1, and a scale is provided on the indicator rod 8. An observation piece 62 is fixed to the detection rod 6, and the observation piece 62 faces the scale on the indicator rod 8.

[0040] Press the detection rod 6 to push the inner ring of the bearing to move. The moving distance of the detection rod 6 reflects the axial clearance of the output shaft 2 bearing. It can be judged whether the axial clearance of the output shaft 2 bearing is in a qualified state. During regular inspections, it is possible to judge whether the axial clearance of the output shaft 2 bearing is qualified without disassembling the multi-purpose power take-off.

[0041] A slider 96 is slidably connected in the accommodating cavity 22, one end of the reset spring 95 away from the operating rod 92 is fixed on the slider 96, one end of the output shaft 2 is provided with a detection notch 25, and a detection rod 2 97 is movably sealed on the output shaft 2, one end of the detection rod 2 97 is against the slider 96, and the other end is located in the detection notch 25. The detection notch 25 is threadedly connected with a plug 98.

[0042] Once the reset spring 95 deteriorates, the joystick 92 cannot be reset, and the multi-purpose power take-off cannot disconnect the power output. Since the reset spring 95 is installed in the accommodating chamber 22, it is generally necessary to disassemble the multi-purpose power take-off for regular maintenance, which is very cumbersome. The present invention is equipped with a slider 96 and a detection rod 97. The staff uses a pressure sensor to press the detection rod 97 to move the detection rod 97 by a preset distance. At this time, the pressure value of the pressure sensor is observed. By comparing the pressure value with the preset pressure range, it can be determined whether the spring is deteriorated.

Claims

1. A multi-purpose power take-off, comprising a housing (1), an output shaft (2), and two output shaft (2) bearings, wherein the output shaft (2) is mounted on the housing (1) through the two output shaft (2) bearings, and characterized in that: The outer wall of the housing (1) is provided with two groups of detection holes (11), the two groups of detection holes (11) respectively correspond to the two output shaft (2) bearings, the inner wall of the detection hole (11) is movably sealed with a detection rod (6), one end of the detection rod (6) is located in the housing (1) and is aligned with the inner ring of the output shaft (2) bearing, and the other end of the detection rod (6) is located outside the detection groove, and the multi-purpose power take-off also includes two connecting rings (7), the detection rods (6) in the two groups of detection holes (11) respectively correspond to the two connecting rings (7), and the detection rod (6) is fixed to the corresponding connecting ring (7).

2. A multi-purpose power take-off according to claim 1, characterized in that: The detection rod 1 (6) is threadedly connected with a locking nut (61).

3. A multi-purpose power take-off according to claim 1, characterized in that: An indicator rod (8) is fixed on the outer wall of the housing (1), and a scale is provided on the indicator rod (8). An observation piece (62) is fixed on the detection rod (6), and the observation piece (62) faces the scale on the indicator rod (8).

4. A multi-purpose power take-off according to claim 1, characterized in that: The output shaft (2) is supported by a deep groove ball bearing.

5. A multi-purpose power take-off according to claim 1, characterized in that: The invention also comprises an operating mechanism (9), wherein the operating mechanism (9) comprises a cylinder (91), an operating rod (92), a pin shaft (93), and a sliding sleeve (94); an output gear (3) is arranged on the output shaft (2); the output gear (3) is mounted on the output shaft (2) via a needle bearing (33); a piston of the cylinder (91) contacts the operating rod (92); the operating rod (92) is connected to the sliding sleeve (94) via the pin shaft (93); a spline is fixed on the inner wall of the sliding sleeve (94); (941), a first spline groove (24) is fixed on the output shaft (2), the sliding sleeve (94) is sleeved on the output shaft (2), the spline (941) is embedded in the first spline groove (24), a step (31) is provided at the end of the output gear (3), and the step (31) is provided with a second spline groove (32), and after the piston rod of the cylinder (91) is extended, the operating rod (92) is driven to move so that the spline (941) in the sliding sleeve (94) is embedded in the second spline groove (32).

6. A multi-purpose power take-off according to claim 5, characterized in that: The output shaft (2) is provided with a receiving cavity (22), the operating rod (92) extends into the receiving cavity (22), a return spring (95) is provided in the receiving cavity (22), the return spring (95) abuts against the end of the operating rod (92) away from the cylinder (91), and after the piston rod of the cylinder (91) is retracted, the elastic force of the return spring (95) drives the operating rod (92) to move so as to disengage the spline (941) in the sliding sleeve (94) from the second spline groove (32).

7. A multi-purpose power take-off according to claim 6, characterized in that: A movable hole (23) is provided on the side wall of the accommodating cavity (22), and the pin shaft (93) passes through the movable hole (23) and is fixed on the sliding sleeve (94).

8. A multi-purpose power take-off according to claim 6, characterized in that: A slider (96) is slidably connected in the accommodating cavity (22); one end of the return spring (95) away from the operating rod (92) is fixed on the slider (96); one end of the output shaft (2) is provided with a detection slot (25); a detection rod (97) is movably sealed on the output shaft (2); one end of the detection rod (97) is against the slider (96) and the other end is located in the detection slot (25).

9. A multi-purpose power take-off according to claim 8, characterized in that: The detection notch (25) is threadedly connected with a plug (98).

10. A multi-purpose power take-off according to claim 1, characterized in that: It also comprises a mounting shaft (4) and two mounting shaft (4) bearings, wherein the mounting shaft (4) is mounted on the housing (1) via the two mounting shaft (4) bearings.

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