Variable hydraulic motor swash plate supporting structure

Abstract

The invention relates to a variable hydraulic motor swash plate supporting structure, and relates to the technical field of hydraulic motors, the traditional cambered surface support and bearing bush form support are abandoned, an upper bearing seat, a lower bearing seat, a tapered roller bearing, a rocker arm and a rotating shaft are combined to support a swash plate, and the friction force can be obviously reduced through the matching of the tapered roller bearing and the rotating shaft; meanwhile, the positions of the two tapered roller bearings can be adjusted through adjusting nuts, the central axes of the swash plate and the flange plate coincide, a gap is eliminated, the mechanical efficiency of the product is improved, the service life is prolonged, a reinforcing mechanism is further arranged, a reinforcing rod is clamped into an adjusting groove of the lower bearing seat, the rocker arm and the lower bearing seat are reinforced, and the stability of the swash plate is enhanced; and meanwhile, the recovery time of the reinforcing rods is delayed through the damping sleeves, the reinforcing rods cannot be directly clamped into the adjusting grooves in the moving process conveniently, meanwhile, when limiting of the pressed plate is relieved through the adjusting nuts, the reinforcing rods can be directly moved out of the adjusting grooves, and the device is convenient to disassemble.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic motors, and in particular to a swash plate support structure for a variable hydraulic motor. Background Art

[0002] The variable hydraulic motor achieves variable motion by changing the swash plate angle, which requires adding a swash plate support structure inside the hydraulic motor to support the swash plate. The traditional swash plate support adopts arc surface support.

[0003] However, the above-mentioned prior art has the following technical defects:

[0004] The friction between the swash plate and the flange is large, resulting in low mechanical efficiency. The variable hydraulic motor can be supported by bearings. In actual applications, there is a fitting gap between the bearings, the swash plate and the flange, which causes wear of the bearings and reduces the service life of the hydraulic motor.

[0005] In summary, the prior art still has room for improvement in extending the service life of the hydraulic motor. Therefore, those skilled in the art have proposed a swash plate support device that can extend the service life of the hydraulic motor. Summary of the Invention

[0006] In order to solve the above problems, the present application provides a variable hydraulic motor swash plate support structure, which adopts the following technical solutions:

[0007] It includes a supporting mechanism, and two lower bearing seats are symmetrically installed on the upper side of the supporting mechanism. The lower bearing seat is provided with an upper bearing seat adapted thereto and a tapered tooth hole is formed on the side. An adjusting nut threadedly connected thereto is provided in the tapered tooth hole. A tapered roller bearing is provided on one side of the adjusting nut, and a rotating shaft adapted thereto is provided in the tapered roller bearing, and a rocker arm is installed at the end of the rotating shaft.

[0008] A semicircular arc groove is provided on the side surface of the lower bearing seat around the tapered roller bearing, and a plurality of evenly distributed adjustment grooves are provided on the inner side surface of the arc groove.

[0009] It also includes a reinforcement mechanism, which includes a lower cavity opened inside the rocker arm, a cylinder with an open end provided in the lower cavity, a damping pad installed on the inner wall of the cylinder, a telescopic rod installed at the center of the other inner wall of the cylinder, a compression plate with a side close to the damping pad installed at the end of the telescopic rod, a reinforcement rod with a spherical end that is stuck in the adjustment groove installed at the center of the side of the compression plate, and a main spring provided on one side of the compression plate in the cylinder.

[0010] Preferably, a swash plate is commonly mounted on the lower ends of the two rocker arms.

[0011] Preferably, a chamber is provided inside the rotating shaft, a limit plate is slidably provided in the chamber, and a secondary spring is provided on one side of the limit plate in the chamber.

[0012] Preferably, a receiving groove is provided at the end of the rotating shaft, one end of the limiting plate extends into the receiving groove and a pressure plate adapted thereto is rotatably mounted.

[0013] Preferably, a connecting groove communicating with the lower cavity is installed on the inner wall of the rotating shaft cavity, and hydraulic oil is provided in the cavity.

[0014] Preferably, a return spring is connected between the cylinder and the inner wall of the lower cavity.

[0015] Preferably, a plurality of evenly distributed fixing holes are provided on the side surface of the adjusting nut, and a fixing mechanism is installed on the upper side of the upper bearing seat.

[0016] Preferably, the fixing mechanism includes a stopper, and an adjusting piece is rotatably mounted on the side of the stopper.

[0017] Preferably, a threaded hole is provided on the side of the adjusting piece, a screw rod adapted thereto is provided in the threaded hole, and a socket which is inserted into a fixing hole is rotatably mounted on the end of the screw rod.

[0018] Preferably, a limiting rod is installed on the side of the socket, which passes through the adjusting plate and is slidably connected to the adjusting plate, and a hexagonal nut is installed on the other end of the screw rod.

[0019] In summary, this application includes at least one of the following beneficial technical effects:

[0020] 1. This invention abandons traditional curved surface supports and bearing shell supports and adopts a combination of upper and lower bearing seats, tapered roller bearings, rocker arms and rotating shafts to support the swash plate. The tapered roller bearings and rotating shaft can significantly reduce friction. At the same time, the position of the two tapered roller bearings can be adjusted using an adjusting nut to make the swash plate and the central axis of the flange coincide, eliminating gaps, improving the mechanical efficiency of the product, and extending its service life.

[0021] 2. The present invention is also provided with a reinforcement mechanism, which cooperates with the support mechanism to allow the reinforcement rod to be stuck in the adjustment groove of the lower bearing seat, thereby reinforcing the rocker arm and the lower bearing seat and enhancing the stability of the swash plate. At the same time, the damping sleeve is used to delay the recovery time of the reinforcement rod, so that the reinforcement rod will not be directly stuck in the various adjustment grooves during movement. At the same time, when the adjustment nut releases the limit on the pressure plate, the reinforcement rod can be directly moved out of the adjustment groove, which is convenient for disassembly of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings and examples.

[0023] Figure 1 It is a structural schematic diagram of the present invention.

[0024] Figure 2 It is a schematic structural diagram of the support mechanism of the present invention.

[0025] Figure 3 It is a structural schematic diagram of the support mechanism of the present invention in a disassembled state.

[0026] Figure 4 It is a cross-sectional view of the present invention.

[0027] Figure 5 It is a structural schematic diagram of the fixing mechanism of the present invention.

[0028] Figure 6 It is a structural schematic diagram of the reinforcement mechanism of the present invention.

[0029] Figure 7 It is a structural schematic diagram of the lower bearing seat of the present invention.

[0030] In the figure: 1. Support mechanism; 101. Flange; 102. Lower bearing seat; 103. Upper bearing seat; 104. Adjusting nut; 105. Rocker arm; 106. Rotating shaft; 107. Tapered roller bearing; 108. Arc groove; 109. Adjusting groove; 110. Fixing hole; 2. Reinforcement mechanism; 201. Lower cavity; 202. Return spring; 203. Cylinder; 204. Telescopic rod; 205. Compression plate; 206. Reinforcement rod; 207. Main spring; 208. Damping pad; 209. Limiting plate; 210. Auxiliary spring; 211. Receiving groove; 212. Pressure plate; 213. Connecting groove; 3. Fixing mechanism; 301. Stop plate; 302. Adjusting plate; 303. Screw; 304. Jack; 305. Limiting rod; 306. Hexagonal nut; 4. Swash plate. DETAILED DESCRIPTION

[0031] The following combination Figure 1 - Figure 7 The embodiments of the present invention are described in detail.

[0032] The embodiment of the present application discloses a variable hydraulic motor swash plate support structure, which abandons traditional arc surface support and bearing support, and adopts a combination of upper and lower bearing seats, tapered roller bearings, rocker arms and rotating shafts to support the swash plate. The cooperation of the tapered roller bearings and the rotating shaft can significantly reduce friction. At the same time, the position of the two tapered roller bearings can be adjusted by using an adjusting nut, so that the swash plate and the central axis of the flange plate coincide with each other, eliminating gaps, improving the mechanical efficiency of the product, and increasing its service life.

[0033] Example 1:

[0034] like Figure 1-Figure 2As shown, it includes a support mechanism 1, and two lower bearing seats 102 are symmetrically installed on the upper side of the support mechanism 1. The lower bearing seat 102 is provided with an upper bearing seat 103 that is compatible with it and a tapered tooth hole is formed on the side. An adjusting nut 104 that is threadedly connected to it is provided in the tapered tooth hole. The lower bearing seat 102 and the upper bearing seat 103 are fixed with bolts. At the same time, the adjusting nut 104 is threadedly connected to the inner wall of the tapered tooth hole. The position of the adjusting nut 104 in the bearing hole can be adjusted by rotating the adjusting nut 104.

[0035] like Figure 2-Figure 4 As shown, a tapered roller bearing 107 is provided on one side of the adjusting nut 104, and a rotating shaft 106 adapted thereto is provided in the tapered roller bearing 107. A rocker arm 105 is mounted on the end of the rotating shaft 106, and a swash plate 4 is mounted on the lower ends of the two rocker arms 105. When the swash plate 4 tilts, the rocker arm 105 allows the rotating shaft 106 to deflect in the tapered roller bearing 107, thereby achieving tilting.

[0036] like Figure 1 、 Figure 3 and Figure 5 As shown, a number of evenly distributed fixing holes 110 are provided on the side of the adjusting nut 104, and a fixing mechanism 3 is installed on the upper side of the upper bearing seat 103. The fixing mechanism 3 includes a stopper 301, and an adjusting piece 302 is rotatably installed on the side of the stopper 301. The side of the adjusting piece 302 is provided with a socket 304 that is inserted into a fixing hole 110. When the adjusting nut 104 is rotated, the socket 304 of the fixing mechanism 3 is pulled into one of the fixing holes 110 on the adjusting nut 104 on the same side to prevent the adjusting nut 104 from rotating.

[0037] In summary, during installation, after placing the two rotating shafts 106 in the two tapered roller bearings 107, screw the two adjusting nuts 104 into the bearing holes respectively, use the two adjusting nuts 104 to adjust the gap, adjust the positions of the two tapered roller bearings 107 in the bearing holes, and make the central axis of the swash plate 4 coincide with the central axis of the flange 101. Then, insert the socket 304 of the fixing mechanism 3 into one of the fixing holes 110 of the adjusting nut 104 on the same side to fix it and prevent it from rotating.

[0038] like Figure 1 and Figure 6 As shown, it also includes a reinforcement mechanism 2, which includes a lower cavity 201 opened inside the rocker arm 105, a cylinder 203 with an open end is provided in the lower cavity 201, and a damping pad 208 is installed on the inner wall of the cylinder 203, which is used to damp objects that are in close contact with and moving therewith.

[0039] like Figure 6As shown, a telescopic rod 204 is installed at the center of the other inner wall of the cylinder 203. A compression plate 205 is installed at the end of the telescopic rod 204, and its side is closely attached to the damping pad 208. A main spring 207 is provided on one side of the compression plate 205 in the cylinder 203. When the compression plate 205 moves, it compresses the telescopic rod 204 and the main spring 207. Then, the rebound of the main spring 207 drives the telescopic rod 204 to extend and the compression plate 205 to restore its position.

[0040] like Figure 7 As shown, a semicircular arc groove 108 is provided on the side of the lower bearing seat 102 around the tapered roller bearing 107, and a number of evenly distributed adjustment grooves 109 are provided on the inner side of the arc groove 108. A reinforcement rod 206 with a spherical end that is snapped into the adjustment groove 109 is installed at the center of the side of the compression plate 205. The reinforcement rod 206 is snapped into the adjustment groove 109, and the stability between the rocker arm 105 and the lower bearing seat 102 is enhanced by the snap fit. At the same time, the end of the reinforcement rod 206 is spherical, and when the rocker arm 105 rotates, it will be squeezed through the inner wall of the adjustment groove 109 to move it out of the adjustment groove 109.

[0041] In summary, the reinforcement rod 206 is inserted into the adjustment groove 109, and the engagement is used to enhance the stability between the rocker arm 105 and the lower bearing seat 102. When the swash plate 4 tilts and deflects, the rocker arm 105 rotates, and the ball head of the compression plate 205 is squeezed by the inner wall of the adjustment groove 109, so that the reinforcement rod 206 moves toward the lower cavity 201. The telescopic rod 204 and the main spring 207 are compressed by the compression plate 205. During the deflection process, the main spring 207 will give the compression plate 205 a rebound force. Due to the damping of the damping pad 208, the compression plate 205 moves slowly until it reaches a predetermined tilt angle. After that, the compression plate 205 moves slowly to drive the reinforcement rod 206 to be re-engaged in the aligned adjustment groove 109.

[0042] like Figure 6 As shown, a chamber is opened inside the rotating shaft 106, and a limit plate 209 is slidingly set in the chamber. A secondary spring 210 is set on one side of the limit plate 209 in the chamber. The limit plate 209 moving toward the secondary spring 210 will compress it, and then the secondary spring 210 rebounds to drive the limit plate 209 to restore its position.

[0043] like Figure 6 As shown, a receiving groove 211 is provided at the end of the rotating shaft 106, one end of the limiting plate 209 extends into the receiving groove 211 and is rotatably installed with a pressure plate 212 adapted thereto. When the adjusting nut 104 is screwed into the bearing hole, the pressure plate 212 is squeezed, and the limiting plate 209 is driven to move through the pressure plate 212.

[0044] like Figure 6As shown, a connecting groove 213 communicating with the lower chamber 201 is installed on the inner wall of the inner chamber of the rotating shaft 106, hydraulic oil is provided in the chamber, and a return spring 202 is connected between the cylinder 203 and the inner wall of the lower chamber 201. The movable limit plate 209 will press the hydraulic oil in the chamber into the lower chamber 201 through the connecting groove 213, pushing the cylinder 203 to move and lengthening the return spring 202 at the same time. Later, when the return spring 202 is shortened, it will pull the cylinder 203 to press the hydraulic oil in the lower chamber 201 back into the chamber.

[0045] In summary, when the adjusting nut 104 is screwed into the bearing hole, the pressure plate 212 will be pressed into the receiving groove 211. At the same time, the hydraulic oil in the chamber will be pressed into the lower chamber 201 through the connecting groove 213 while the secondary spring 210 is compressed by the limit plate 209, pushing the cylinder 203 to move and lengthen the return spring 202 while allowing the reinforcement rod 206 to be stuck in the aligned adjustment groove 109. When the adjusting nut 104 is disassembled, the pressure plate 212 is no longer squeezed, and the secondary spring 210 rebounds to drive the limit plate 209 and the pressure plate 212 to restore their positions. At the same time, the return spring 202 shortens and drives the cylinder 203 to move to press the hydraulic oil in the lower chamber 201 back into the chamber, allowing the reinforcement rod 206 to move out of the stuck adjustment groove 109.

[0046] Example 2:

[0047] Based on the first embodiment, Figure 5 As shown, a threaded hole is provided on the side of the adjusting piece 302, and a screw 303 adapted thereto is provided in the threaded hole. The end of the screw 303 is rotatably connected to the socket 304. By rotating the screw 303 to move it, the socket 304 can be driven to move, thereby adjusting the lateral position of the socket 304. Even if the adjustment nut 104 is in various positions in the bearing hole, the socket 304 can still be inserted into the fixing hole 110.

[0048] like Figure 5 As shown, a limiting rod 305 is installed on the side of the socket 304, which passes through the adjusting plate 302 and is slidably connected to it. A hexagonal nut 306 is installed at the other end of the screw 303. The limiting rod 305 limits the socket 304 to prevent the socket 304 from rotating when the screw 303 rotates. At the same time, the hexagonal nut 306 allows the user to rotate the screw 303 with a wrench.

[0049] This application also discloses a method for using a variable hydraulic motor swash plate support structure, the method comprising the following steps:

[0050] S1. Structural installation: Use the support mechanism 1 to install the structure so that the central axis of the swash plate 4 and the flange 101 coincide. Specifically, after placing the two rotating shafts 106 in the two tapered roller bearings 107, place the two tapered roller bearings 107 on the two lower bearing seats 102 respectively, and then install the two upper bearing seats 103. At this time, the two tapered roller bearings 107 are respectively in the two bearing holes. Screw the two adjusting nuts 104 into the bearing holes respectively, use the two adjusting nuts 104 to adjust the gap, and adjust the position of the two tapered roller bearings 107 in the bearing holes so that the central axis of the swash plate 4 coincides with the central axis of the flange 101. The installation is complete.

[0051] S2. Structural reinforcement. The adjusting nut 104 and the rocker arm 105 are reinforced respectively by the reinforcing mechanism 2 and the fixing mechanism 3. Specifically, the two stoppers 301 are respectively installed on the two upper bearing seats 103, and the corresponding sockets 304 are inserted into the fixing holes 110 of the adjusting nut 104 on the same side to prevent the adjusting nut 104 from rotating. At the same time, when the adjusting nut 104 is screwed into the bearing hole, the pressure plate 212 is pressed into the receiving groove 211. At the same time, the auxiliary spring 210 is compressed by the limit plate 209, and the hydraulic oil in the chamber is pressed into the lower chamber 201 through the connecting groove 213. The cylinder 203 is pushed to move and the return spring 202 is lengthened. At the same time, the reinforcing rod 206 is inserted into the aligned adjustment groove 109, so that the rocker arm 105 and the lower bearing seat 102 are reinforced, thereby enhancing the stability of the swash plate 4.

[0052] S3. Tilt protection: After the swash plate 4 is tilted, the reinforcement rod 206 is placed in the other adjustment slot 109, and the swash plate 4 can still be reinforced. Specifically, when the swash plate 4 tilts and deflects, the rocker arm 105 rotates, and the ball head of the compression plate 205 is squeezed by the inner wall of the adjustment slot 109, causing the reinforcement rod 206 to move toward the lower cavity 201. The compression plate 205 compresses the telescopic rod 204 and the main spring 207. During the deflection process, the main spring 207 exerts a rebound force on the compression plate 205. Due to the damping of the damping pad 208, the compression plate 205 moves slowly until it reaches the predetermined tilt angle. After that, the compression plate 205 moves slowly to drive the reinforcement rod 206 to re-engage in the aligned adjustment slot 109.

[0053] S4. Structural disassembly. During the disassembly of the adjusting nut 104, the reinforcing rod 206 is moved out of the stuck adjusting slot 109 to facilitate disassembly. Specifically, when the adjusting nut 104 is disassembled, the pressure plate 212 is no longer squeezed, and the auxiliary spring 210 rebounds to drive the limit plate 209 and the pressure plate 212 to restore their positions. At the same time, the return spring 202 shortens and drives the cylinder 203 to move to press the hydraulic oil in the lower chamber 201 back into the chamber, while allowing the reinforcing rod 206 to move out of the stuck adjusting slot 109.

[0054] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as exemplary and non-restrictive.

[0055] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A swash plate support structure for a variable hydraulic motor, characterized by: The invention comprises a support mechanism (1), wherein two lower bearing seats (102) are symmetrically installed on the upper side of the support mechanism (1), an upper bearing seat (103) adapted thereto is provided on the lower bearing seat (102) and a tapered tooth hole is formed on the side thereof, an adjusting nut (104) threadedly connected thereto is provided in the tapered tooth hole, a tapered roller bearing (107) is provided on one side of the adjusting nut (104), a rotating shaft (106) adapted thereto is provided in the tapered roller bearing (107), and a rocker arm (105) is installed at the end of the rotating shaft (106); A semicircular arc groove (108) is provided on the side surface of the lower bearing seat (102) around the tapered roller bearing (107), and a plurality of evenly distributed adjustment grooves (109) are provided on the inner side surface of the arc groove (108); The invention also includes a reinforcement mechanism (2), which includes a lower chamber (201) opened inside the rocker arm (105), a cylinder (203) with an open end provided in the lower chamber (201), a damping pad (208) installed on the inner wall of the cylinder (203), a telescopic rod (204) installed at the center of the other inner wall of the cylinder (203), a compression plate (205) with a side surface close to the damping pad (208) installed at the end of the telescopic rod (204), a reinforcement rod (206) with a spherical end that is clamped in the adjustment groove (109) installed at the center of the side surface of the compression plate (205), and a main spring (207) provided on one side of the compression plate (205) in the cylinder (203).

2. The variable hydraulic motor swash plate support structure according to claim 1, characterized in that: A swash plate (4) is commonly mounted on the lower ends of the two rocker arms (105).

3. The variable hydraulic motor swash plate support structure according to claim 2, characterized in that: A chamber is provided inside the rotating shaft (106), a limit plate (209) is slidably provided in the chamber, and a secondary spring (210) is provided on one side of the limit plate (209) in the chamber.

4. The variable hydraulic motor swash plate support structure according to claim 3, characterized in that: A receiving groove (211) is provided at the end of the rotating shaft (106), and one end of the limiting plate (209) extends into the receiving groove (211) and is rotatably mounted with a pressure plate (212) adapted thereto.

5. The variable hydraulic motor swash plate support structure according to claim 4, characterized in that: A connecting groove (213) communicating with the lower chamber (201) is installed on the inner wall of the inner chamber of the rotating shaft (106), and hydraulic oil is provided in the chamber.

6. The variable hydraulic motor swash plate support structure according to claim 5, characterized in that: A return spring (202) is connected between the cylinder (203) and the inner wall of the lower chamber (201).

7. The variable hydraulic motor swash plate support structure according to claim 6, characterized in that: A plurality of evenly distributed fixing holes (110) are provided on the side surface of the adjusting nut (104), and a fixing mechanism (3) is installed on the upper side of the upper bearing seat (103).

8. The variable hydraulic motor swash plate support structure according to claim 7, characterized in that: The fixing mechanism (3) comprises a stopper (301), and an adjusting piece (302) is rotatably mounted on the side of the stopper (301).

9. The variable hydraulic motor swash plate support structure according to claim 8, characterized in that: A threaded hole is provided on the side of the adjusting piece (302), in which a screw rod (303) adapted thereto is provided. The end of the screw rod (303) is rotatably mounted with a socket (304) which is inserted into a fixing hole (110).

10. The variable hydraulic motor swash plate support structure according to claim 9, characterized in that: A limiting rod (305) is installed on the side of the jack (304) and passes through the adjusting piece (302) and is slidably connected thereto. A hexagonal nut (306) is installed on the other end of the screw rod (303).

Images