A CBHS gear pump motor

Abstract

This invention relates to the field of gear pump motor technology and discloses a CBHS gear pump motor, including a front cover, a pump body, and a rear cover connected to each other. The pump body has an inlet and an outlet on both sides, communicating with the internal cavity of the pump body. It also includes two opposing upper and lower bushings, both installed within the pump body cavity. A driving helical gear and a driven helical gear are rotatably mounted between the opposing upper and lower bushings via a sealing shaft. This invention features an adjustable compensation system. Through staggered upper and lower misalignment blocks, the position of the lower bushing is vertically adjusted, precisely reducing the meshing clearance of the helical gear after wear, effectively suppressing internal leakage, improving volumetric efficiency, and reducing operating vibration and noise. Furthermore, a locking system is included. A trapezoidal plug plate, combined with double anti-loosening nuts and an anti-slip coating, achieves rigid locking of the lower bushing after adjustment, preventing bushing movement caused by hydraulic pressure impact and maintaining optimal gear meshing clearance over a long period.

Description

Technical Field

[0001] This invention relates to the field of gear pump motor technology, specifically to a CBHS gear pump motor. Background Technology

[0002] As a core power transmission component of hydraulic systems, gear pump motors are widely used in equipment such as engineering machinery, agricultural machinery, and hydraulic machine tools. They rely on a pair of meshing gears to complete the suction and discharge of oil. With its advantages of compact structure, stable transmission, and adaptability to high-pressure conditions, the CBHS series gear pump motor has become the mainstream choice for small and medium flow hydraulic circuits.

[0003] However, during long-term continuous operation of gear pump motors, problems such as gear meshing wear, oil backflow in pipelines, and expansion of internal sealing gaps will directly reduce the volumetric efficiency of the hydraulic system, aggravate vibration and noise, and shorten the service life of the entire machine. Therefore, there is an urgent need for a gear pump motor that can compensate for gaps, has reliable locking, and has an independent anti-reverse function. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a CBHS gear pump motor, primarily to solve the problems that, during long-term continuous operation of the gear pump motor, gear meshing wear, oil backflow in pipelines, and enlargement of internal sealing gaps directly reduce the volumetric efficiency of the hydraulic system, exacerbate vibration and noise, and shorten the service life of the entire machine.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A CBHS gear pump motor includes a front cover, a pump body, and a rear cover connected to each other. The pump body has an inlet and an outlet on each side, respectively communicating with the internal cavity of the pump body. The motor also includes: The two upper and lower shaft sleeves are installed in the pump body cavity. The two upper and lower shaft sleeves are respectively connected by a sealing shaft and a driving helical gear and a driven helical gear, and the driving helical gear and the driven helical gear are compensated to mesh. An adjustable compensation system is installed between the contact positions of the upper and lower bushings to adjust the sealing of the lower bushing. The locking system is located at the bottom of the pump body and is used to lock and fix the lower shaft sleeve in its adjusted position. The check valve system is installed inside the pump body and connected to the outlet. It is used to switch between the blocked and open states of the outlet.

[0006] As a further embodiment of the present invention, the adjustable compensation system includes: Multiple upper misaligned blocks and multiple lower misaligned blocks are integrally formed at the bottom end of the upper bushing, and multiple lower misaligned blocks are integrally formed at the top end of the lower bushing, with adjacent upper and lower misaligned blocks interlocking and sealing each other. The release groove is located between the lower shaft sleeve and the pump body cavity, and is used for the movement and clearance of the lower shaft sleeve.

[0007] As a further embodiment of the present invention, the bottom end of the upper bushing is fixedly connected with a plurality of arrayed stabilizing rods, and the top of the lower bushing is provided with stabilizing holes that cooperate with the stabilizing rods.

[0008] As a further embodiment of the present invention, the locking system includes: The pin holder is inserted at the bottom of the pump body. The top of the pin holder has a lower connecting end. The bottom of the two lower bushings has an upper connecting groove that matches the lower connecting end. The upper connecting grooves of the two lower bushings are arranged in the same direction. The screw and anti-loosening nut cooperate with each other, and the screw is fixed to the bottom end of the pump body by a fixing seat; The stop plate is located between the fixed seat and the pin frame. The cross-section of the stop plate is an isosceles trapezoid. The opposite surfaces of the fixed seat and the pin frame are provided with inclined surfaces that cooperate with the stop plate.

[0009] As a further embodiment of the present invention, the contact surfaces of the plug plate, the fixing seat and the pin frame are all provided with anti-slip coatings, and there are at least two anti-loosening nuts.

[0010] As a further embodiment of the present invention, a dynamic sealing sleeve is installed between the bottom of the pump body and the pin frame, and multiple sealing rings are provided on the outer side of the pin frame.

[0011] As a further embodiment of the present invention, annular grooves are provided at both ends of the pump body, and sealing gaskets are installed in the annular grooves, with the sealing gaskets protruding from the surface of the annular grooves.

[0012] As a further embodiment of the present invention, the gap between the two upper and lower bushings is equal to that between the driving helical gear and the driven helical gear, which is used to restrict the axial movement of the driving helical gear and the driven helical gear. The front cover and the rear cover respectively contact the opposite end faces of the upper and lower bushings and form a compression seal.

[0013] As a further embodiment of the present invention, the anti-reverse system includes a mounting ball groove opened inside the pump body, an adjusting ball head installed in the mounting ball groove, a through hole opened inside the adjusting ball head, and a reduction motor for driving the adjusting ball head to rotate is installed at the bottom end of the pump body.

[0014] As a further embodiment of the present invention, the through hole is equal to the inner diameter of the liquid outlet, and the diameter of the adjusting ball head is greater than the inner diameter of the liquid outlet, which is used to block the liquid outlet after the adjusting ball head is rotated.

[0015] Compared with the prior art, the present invention provides a CBHS gear pump motor, which has the following beneficial effects: 1. The present invention is equipped with an adjustable compensation system. Through the interlocking upper and lower misalignment blocks and the release groove and the guide of the stabilizing rod, the position of the lower bushing can be vertically adjusted to accurately reduce the meshing clearance after the helical gear wears, effectively suppress internal leakage, improve volumetric efficiency, and reduce operating vibration and noise.

[0016] 2. The invention is equipped with a locking system, in which a trapezoidal plug plate, together with double anti-loosening nuts and an anti-slip coating, achieves rigid locking of the lower bushing after adjustment, avoiding bushing movement caused by hydraulic shock, and maintaining the optimal meshing clearance of the gears in a long-term stable manner.

[0017] 3. The present invention is equipped with an electric anti-reverse system, in which a geared motor drives the adjusting ball head to rotate and switch between the passage and the blocking state. When the machine stops, it blocks the backflow of oil, protects the gear from the impact of reverse oil pressure, and stabilizes the hydraulic circuit pressure.

[0018] 4. The alternating sealing of the upper and lower misaligned blocks of this invention, combined with multiple sealing rings, protruding sealing gaskets, and dynamic sealing sleeves, achieves full-position sealing of the pump body joints, shaft sleeve mating positions, and locking mechanism installation positions, preventing oil seepage and leakage at all points. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the front three-dimensional structure of a CBHS gear pump motor proposed in this invention; Figure 2 This is a schematic diagram of the upper and lower bushing structures of a CBHS gear pump motor proposed in this invention. Figure 3 This is a schematic diagram of the upper and lower misaligned blocks of a CBHS gear pump motor proposed in this invention. Figure 4 This is a schematic diagram of the internal structure of a CBHS gear pump motor according to the present invention. Figure 5 This is a schematic diagram of the upper connecting slot and lower connecting end structure of a CBHS gear pump motor proposed in this invention; Figure 6 This is a schematic diagram of the plug plate mounting position structure of a CBHS gear pump motor proposed in this invention; Figure 7 This invention proposes a CBHS gear pump motor. Figure 6 A schematic diagram of the exploded structure; Figure 8 This invention proposes a CBHS gear pump motor. Figure 1 A schematic diagram of the rear three-dimensional structure; Figure 9This is a schematic diagram of the adjusting ball head and through hole structure of a CBHS gear pump motor proposed in this invention.

[0020] In the picture: 101. Front cover; 102. Pump body; 10201. Release groove; 103. Rear cover; 104. Sealing gasket; 105. Driving helical gear; 106. Driven helical gear; 201. Liquid inlet; 202. Liquid outlet; 3. Adjustable compensation system; 301. Upper bushing; 30101. Upper misalignment block; 302. Lower bushing; 30201. Lower misalignment block; 30202. Upper connecting slot; 303. Stabilizer bar; 304. Stabilizer hole; 4. Locking system; 401. Pin holder; 40101. Lower connecting end; 402. Dynamic sealing sleeve; 403. Sealing ring; 404. Fixing base; 405. Plug plate; 406. Screw; 407. Anti-loosening nut; 5. Anti-reverse system; 501. Gear motor; 502. Mounting ball groove; 503. Adjusting ball head; 504. Through hole. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0022] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0024] Please see Figures 1-9 As shown, a CBHS gear pump motor includes a front cover 101, a pump body 102 and a rear cover 103 connected to each other. The pump body 102 has an inlet 201 and an outlet 202 on both sides that communicate with the inner cavity of the pump body 102. Two upper shaft sleeves 301 are installed in the inner cavity of the pump body 102. The end of the active helical gear 105, which is rotatably installed between the two upper shaft sleeves 301 through the sealing shaft, passes through the front cover 101 to form a drive end. Two lower shaft sleeves 302 are installed in the inner cavity of the pump body 102. A driven helical gear 106 is rotatably installed between the two lower shaft sleeves 302 through a sealing shaft. The driven helical gear 106 and the driving helical gear 105 are compensated to mesh.

[0025] During operation, power is input to the drive end of the active helical gear 105, which drives the active helical gear 105 to rotate. The active helical gear 105 drives the driven helical gear 106 to rotate synchronously in the opposite direction through meshing transmission. The volume of the chamber on the side of the inlet 201 gradually increases, forming a local negative pressure, which draws the oil to be transported into the chamber from the inlet 201. The oil is separated and carried by the tooth grooves of two helical gears, and transported to the side of the outlet 202 as the gears rotate.

[0026] The gap between the two opposing upper bushings 301 and lower bushing 302 is equal to that between the driving helical gear 105 and the driven helical gear 106, which is used to limit the axial movement of the driving helical gear 105 and the driven helical gear 106. Therefore, by cooperating with the positioning support of the upper bushings 301 and lower bushings 302, the stability of the transmission is improved and the overall service life of the equipment is extended.

[0027] To improve the sealing effect, the front cover 101 and the rear cover 103 contact the opposite end faces of the upper bushing 301 and the lower bushing 302 respectively to form a compression seal. Both ends of the pump body 102 are provided with annular grooves, and sealing gaskets 104 are installed in the annular grooves. The sealing gaskets 104 protrude from the surface of the annular grooves, thereby achieving an effective seal between the front cover 101, the pump body 102 and the rear cover 103.

[0028] In addition, after prolonged use, the driving helical gear 105 and the driven helical gear 106 will develop gaps due to wear, which will not only increase vibration and noise, but also cause internal leakage of oil in the pump body 102, reduce volumetric efficiency, and affect the stability of oil delivery.

[0029] Therefore, an adjustable compensation system 3 is provided. The adjustable compensation system 3 is located between the contact positions of the upper bushing 301 and the lower bushing 302, and is used to adjust the sealing of the position of the lower bushing 302. Specifically, the adjustable compensation system 3 includes: Multiple upper misalignment blocks 30101 and multiple lower misalignment blocks 30201 are integrally formed at the bottom end of the upper bushing 301, and multiple lower misalignment blocks 30201 are integrally formed at the top end of the lower bushing 302. Adjacent upper misalignment blocks 30101 and lower misalignment blocks 30201 are interleaved and sealed. Multiple arrayed stabilizing rods 303 are fixedly connected to the bottom end of the upper bushing 301, and stabilizing holes 304 that cooperate with the stabilizing rods 303 are opened at the top of the lower bushing 302. Therefore, by using multiple upper misaligned blocks 30101 and multiple lower misaligned blocks 30201 that are staggered to seal both sides of the upper bushing 301 and the lower bushing 302, the oil in the inlet 201 is prevented from flowing from the gap between the upper bushing 301 and the lower bushing 302 to the outlet 202. The staggered distribution of multiple upper misalignment blocks 30101 and multiple lower misalignment blocks 30201 can also effectively avoid misalignment for adjusting the vertical position of the lower bushing 302.

[0030] Specifically, when vibration and noise increase or the stability of oil delivery decreases, it indicates that the clearance between the driving helical gear 105 and the driven helical gear 106 is too large. Therefore, by synchronously adjusting the position height of the two lower bushings 302, that is, adjusting the position height of the driven helical gear 106, the clearance between the driving helical gear 105 and the driven helical gear 106 is reduced. The release groove 10201 is located between the lower bushing 302 and the inner cavity of the pump body 102, and is used for the movement and avoidance of the lower bushing 302.

[0031] The bottom of the pump body 102 is provided with a locking system 4 for locking and fixing the lower shaft sleeve 302 after adjustment.

[0032] Specifically, the locking system 4 includes a pin frame 401, a cooperating screw 406 and an anti-loosening nut 407, and a plug plate 405. The screw 406 is fixed to the bottom end of the pump body 102 through a fixing seat 404. The pin holder 401 is inserted into the bottom of the pump body 102. The top of the pin holder 401 is provided with a lower connecting end 40101. The bottom of the two lower bushings 302 are provided with upper connecting slots 30202 that cooperate with the lower connecting end 40101. Therefore, the lower bushings 302 and the pin holder 401 can be connected by inserting the lower connecting end 40101 into the upper connecting slots 30202. The lower bushings 302 can be adjusted by adjusting the position of the pin holder 401. The upper connecting grooves 30202 of the two lower bushings 302 are arranged in the same direction, which facilitates the installation of the two lower bushings 302 one by one. The axial direction of the upper connecting grooves 30202 is semi-closed, which also effectively improves the sealing effect. The stopper plate 405 is located between the fixed seat 404 and the pin frame 401. The cross section of the stopper plate 405 is an isosceles trapezoid. The opposite surfaces of the fixed seat 404 and the pin frame 401 are provided with inclined surfaces that cooperate with the stopper plate 405. The anti-loosening nut 407 is threaded onto the external thread of the screw 406 and presses and fixes the pin holder 401.

[0033] Specifically, in order to avoid the risk of positional displacement of the lower bushing 302 during long-term operation, the locking system 4 can stably lock the adjusted lower bushing 302 to prevent it from shifting position during the operation of the gear pump motor.

[0034] When it is necessary to adjust the vertical position of the lower bushing 302, first loosen the anti-loosening nut 407, and at the same time release the pressure on the plug plate 405 and the pin holder 401. At this time, by adjusting the position of the plug plate 405, the position of the pin holder 401 can be adjusted, and the pin holder 401 can drive the two lower bushings 302 to move synchronously vertically. That is, push the stopper 405 to the right (as shown). Figures 5-7 As shown), at this time, the pin holder 401 can drive the two lower bushings 302 to move vertically upward. After adjusting to the position, tighten the anti-loosening nut 407 again, and firmly press and fix the pin holder 401 to the end face of the fixed seat 404 at the bottom of the pump body 102 through the plug plate 405. It should be noted that the contact surfaces of the plug plate 405, the fixed seat 404 and the pin holder 401 are all provided with anti-slip coating, which effectively improves the anti-slip effect and avoids slippage, thus affecting the locking stability; thereby completing the position locking of the two lower bushings 302.

[0035] Furthermore, there are at least two lock nuts 407. By stacking two lock nuts 407 together, the locking effect is improved, effectively preventing loosening after long-term use.

[0036] The locking system 4 is easy to operate and has high locking reliability. It can adapt to different adjustment positions of the lower bushing 302, ensuring that the gap between the driving helical gear 105 and the driven helical gear 106 can remain stable for a long time after adjustment. This reduces the risk of increased vibration and noise and decreased oil delivery stability during the operation of the gear pump motor, and extends the overall service life of the equipment.

[0037] Meanwhile, a dynamic sealing sleeve 402 is installed between the bottom of the pump body 102 and the pin frame 401. Multiple sealing rings 403 are provided on the outer side of the pin frame 401. Annular grooves are provided at both ends of the pump body 102. Sealing gaskets 104 are installed in the annular grooves and protrude from the surface of the annular grooves, thereby achieving a sliding seal between the pin frame 401 and the pump body 102 and preventing oil leakage during the use of the gear pump.

[0038] Furthermore, the present invention provides a check valve system 5 to block the oil at the outlet 202, thereby effectively preventing oil backflow when the gear pump is not started. Specifically, the check valve system 5 is installed inside the pump body 102 and connected to the outlet 202, and is used to switch between the blocked state and the open state of the outlet 202.

[0039] The anti-reverse system 5 includes a mounting ball groove 502 inside the pump body 102, an adjusting ball head 503 is installed in the mounting ball groove 502, a through hole 504 is provided inside the adjusting ball head 503, and a reduction motor 501 for driving the adjusting ball head 503 to rotate is installed at the bottom of the pump body 102.

[0040] It should be noted that the inner diameter of the through hole 504 is equal to that of the outlet 202, and the diameter of the adjusting ball head 503 is larger than that of the outlet 202, which is used to adjust the ball head 503 to seal the outlet 202 after rotation.

[0041] When the gear pump motor stops working, the geared motor 501 drives the adjusting ball head 503 to rotate, so that the through hole 504 is misaligned with the liquid outlet 202. The solid outer wall of the adjusting ball head 503 completely blocks the liquid outlet 202, preventing the oil in the oil outlet pipeline from flowing back into the pump body 102. When the gear pump motor needs to be started to output oil, the geared motor 501 drives the adjusting ball head 503 to rotate until the through hole 504 is aligned and coaxial with the outlet 202, thus keeping the outlet 202 unobstructed and meeting the normal oil delivery requirements. This structure is simple and reliable, with fast switching response, and will not have an additional impact on the oil flow cross-sectional area of ​​the outlet 202, ensuring the output efficiency while achieving stable backflow prevention.

[0042] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0043] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A CBHS gear pump motor, comprising a front cover (101), a pump body (102), and a rear cover (103) connected to each other, wherein an inlet (201) and an outlet (202) communicating with the inner cavity of the pump body (102) are respectively provided on both sides, characterized in that, Also includes: The two upper bushings (301) and the lower bushing (302) are installed in the inner cavity of the pump body (102). The two upper bushings (301) and the lower bushing (302) are respectively rotatably mounted with a driving helical gear (105) and a driven helical gear (106) through a sealing shaft, and the driving helical gear (105) and the driven helical gear (106) are in compensating meshing. Adjustable compensation system (3) is provided between the contact positions of the upper bushing (301) and the lower bushing (302) for sealing adjustment of the position of the lower bushing (302); Locking system (4) is set at the bottom of pump body (102) for locking and fixing the lower bushing (302) after adjustment; The anti-reverse system (5) is installed inside the pump body (102) and connected to the outlet (202) for switching between the blocked state and the open state of the outlet (202).

2. The CBHS gear pump motor according to claim 1, characterized in that, The adjustable compensation system (3) includes: Multiple upper misaligned blocks (30101) and multiple lower misaligned blocks (30201) are integrally formed at the bottom end of the upper bushing (301), and multiple lower misaligned blocks (30201) are integrally formed at the top end of the lower bushing (302), and adjacent upper misaligned blocks (30101) and lower misaligned blocks (30201) are interleaved and sealed. The release groove (10201) is located between the lower bushing (302) and the inner cavity of the pump body (102) for the movement and avoidance of the lower bushing (302).

3. A CBHS gear pump motor according to claim 2, characterized in that, The bottom end of the upper bushing (301) is fixedly connected with a plurality of arrayed stabilizing rods (303), and the top of the lower bushing (302) is provided with stabilizing holes (304) that cooperate with the stabilizing rods (303).

4. A CBHS gear pump motor according to claim 1, characterized in that, The locking system (4) includes: A pin holder (401) is inserted into the bottom of the pump body (102). The top of the pin holder (401) is provided with a lower connecting end (40101). The bottom ends of the two lower bushings (302) are provided with upper connecting slots (30202) that cooperate with the lower connecting end (40101). The upper connecting slots (30202) of the two lower bushings (302) are arranged in the same direction. The screw (406) and the anti-loosening nut (407) cooperate with each other. The screw (406) is fixed to the bottom end of the pump body (102) through the fixing seat (404); The stop plate (405) is located between the fixed seat (404) and the pin frame (401). The cross section of the stop plate (405) is an isosceles trapezoid. The opposite surfaces of the fixed seat (404) and the pin frame (401) are provided with inclined surfaces that cooperate with the stop plate (405).

5. A CBHS gear pump motor according to claim 4, characterized in that, The contact surfaces of the stopper plate (405), the fixing seat (404) and the pin bracket (401) are all provided with anti-slip coatings, and there are at least two anti-loosening nuts (407).

6. A CBHS gear pump motor according to claim 4, characterized in that, A dynamic sealing sleeve (402) is installed between the bottom of the pump body (102) and the pin frame (401), and multiple sealing rings (403) are provided on the outside of the pin frame (401).

7. A CBHS gear pump motor according to claim 1, characterized in that, Both ends of the pump body (102) are provided with annular grooves, and a sealing gasket (104) is installed in the annular groove, with the sealing gasket (104) protruding from the surface of the annular groove.

8. A CBHS gear pump motor according to claim 1, characterized in that, The gap between the two opposing upper bushings (301) and lower bushings (302) is equal to that between the driving helical gear (105) and the driven helical gear (106), which is used to restrict the axial movement of the driving helical gear (105) and the driven helical gear (106). The front cover (101) and the rear cover (103) contact the opposite end faces of the upper bushings (301) and the lower bushings (302) respectively and form a compression seal.

9. A CBHS gear pump motor according to claim 1, characterized in that, The anti-reverse system (5) includes a mounting ball groove (502) inside the pump body (102), an adjusting ball head (503) is installed in the mounting ball groove (502), a through hole (504) is provided inside the adjusting ball head (503), and a reduction motor (501) for driving the adjusting ball head (503) to rotate is installed at the bottom of the pump body (102).

10. A CBHS gear pump motor according to claim 9, characterized in that, The through hole (504) has the same inner diameter as the outlet (202), and the diameter of the adjusting ball head (503) is larger than the inner diameter of the outlet (202), which is used to block the outlet (202) after the adjusting ball head (503) is rotated.

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