CN111852855B

CN111852855B - Bidirectional internal circulation automatic compensation hydraulic gear oil pump system for body-building equipment

Info

Publication number: CN111852855B
Application number: CN202010783695.0A
Authority: CN
Inventors: 谢远志; 黄飞飞; 徐林建; 季翠娴; 王佳玲; 石优国; 蒋培均
Original assignee: Nantong Ironmaster Sporting Industrial Co Ltd
Current assignee: Nantong Ironmaster Sporting Industrial Co Ltd
Priority date: 2020-08-06
Filing date: 2020-08-06
Publication date: 2024-06-11
Anticipated expiration: 2040-08-06
Also published as: CN111852855A

Abstract

The invention relates to a bidirectional internal circulation automatic compensation hydraulic gear oil pump system for body-building equipment, which comprises a pump front cover and a pump rear cover, wherein a gear pump shell is arranged between the pump front cover and the pump rear cover, a main shaft is inserted into the pump front cover, the main shaft is connected with a transmission gear shaft, one end of the transmission gear shaft is sleeved with a pump connecting block through a bearing, a front pump body and a rear pump body are sleeved on the transmission gear shaft, the transmission gear shaft is connected with a driven gear shaft, the driven gear shaft is arranged between the pump connecting block and the pump rear cover, a through hole is arranged in the driven gear shaft, an oil inlet is formed in the pump rear cover, and the through hole is communicated with the oil inlet. Through the structure of increasing two opposite check valves in two-way hydraulic gear oil pump inside for the oil inlet can only flow to the oil pump inside, and the oil pump inside can not flow to the oil inlet, and high-pressure district oil can not flow to oilcan department, prevents the loss of oil in the oil circuit, and the oil mass still is in balanced state.

Description

Bidirectional internal circulation automatic compensation hydraulic gear oil pump system for body-building equipment

Technical Field

The invention relates to a body-building training device, in particular to a bidirectional internal circulation automatic compensation hydraulic gear oil pump system for body-building equipment.

Background

A conventional hydraulic bi-directional gear oil pump relies on two or more gears and cylinders sealed in a housing to separate the suction and discharge chambers. The pump has one oil inlet connected to the oil tank and one oil outlet connected to the hydraulic system, and the pump capable of conveying liquid via the change in the volume of the working space produced during the mutual meshing process during the rotation of the gears. The gap seal used in the high and low pressure areas of the hydraulic pump is inevitably leaked, and the leaked oil is continuously generated and flows back to the oil tank through the oil drain port.

When the traditional bidirectional gear pump is used for adjusting torque of a rotating shaft, a large oil tank is needed, some occasions are not suitable due to space limitation, and mutual switching of oil inlet and oil outlet is difficult, if an internal circulation structure is adopted (the structure can be used without the oil tank), due to the fact that the oil pump has leakage, leakage oil which is always generated in the use process can be discharged into the oil tank at the oil outlet, a closed oil way cannot be supplemented, so that the torque is unstable, the oil pump loses effect when the oil leaks to a certain amount, and oiling is difficult.

In the prior art, the oil pump is provided with a shallow notch on the front pump body, the structure is complex, the processing is inconvenient, and the production cost is greatly increased.

Disclosure of Invention

The invention aims to provide a bidirectional internal circulation automatic compensation hydraulic gear oil pump system for body-building equipment, which solves the problems in the background technology.

In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a body-building equipment is with two-way inner loop automatic compensation hydraulic gear oil pump system, including pump protecgulum and pump back lid, be equipped with the gear pump shell between pump protecgulum and the pump back lid, insert the main shaft in the pump protecgulum, the main shaft is connected the transmission gear axle, there is the pump connecting block one end of transmission gear axle through the bearing housing, the last cover of transmission gear axle has preceding pump body and back pump body, transmission gear axle and driven gear axle are connected, driven gear axle is arranged in between pump connecting block and the pump back lid, be equipped with a through-hole in the driven gear axle, it has an oil inlet to cover after the pump, the through-hole communicates with each other with the oil inlet.

The invention further improves that: a shallow slot is formed in the pump connecting block, the shallow slot is communicated with two cavities of the oil pump, through holes are drilled in two sides of the pump connecting block, a central hole is drilled in the shallow slot and communicated with the through holes, the end face of the top of the pump connecting block is a sealing ring slot, two outer sides of the sealing ring slot are provided with blind holes, an elastic pin is arranged in the blind holes to limit steel balls, and the steel balls form two unidirectional structures on chamfer angles on two sides of the through holes.

The invention further improves that: the through hole consists of phi 6 holes on two sides and phi 3 holes in the middle, and a chamfer is arranged between the phi 6 holes and the phi 3 holes.

The invention further improves that: the length of the chamfer is 2.6mm, and the angle of the chamfer is 30 degrees.

The invention further improves that: an outer sealing ring is arranged between the gear pump shell and the pump connecting block.

The invention further improves that: an inner side special-shaped sealing ring is arranged between the front pump body and the pump connecting block.

Compared with the prior art, the invention has the beneficial effects that:

The invention processes a through hole on the driven gear shaft, which is communicated with an overflow port on the back cover of the pump, and the overflow port is connected with a small oil pot to change the original overflow port into an oil filling inlet. Through the structure that two opposite check valves are added in the bidirectional hydraulic gear oil pump, the oil inlet can only flow to the inside of the oil pump, but the inside of the oil pump cannot flow to the oil inlet, the pressure difference between high and low pressures generated during the operation of the oil pump can enable one of the two opposite check valves to be in a sealed state and the other to be in an open state, when the pressure of a low-pressure area is smaller than that of an oil inlet oil can, the check valve on that side is in the open state, oil at the gear flows into the low-pressure area and the oil can together automatically add and compensate the oil in an oil way through the check valve, the pressure at the oil inlet oil can is smaller than that of a high-pressure area (at the moment, the check valve on that side is closed), the oil at the high-pressure area cannot flow to the oil can not flow to the oil can, and loss of the oil in the oil way is prevented, so that the leaked oil generated during the operation of the oil pump is still in a balanced state through the effect of the open check valve, that is the oil drain port of the traditional bidirectional gear pump forms the oil inlet, and simultaneously, a throttle valve can be arranged on a circuit on the oil pump to automatically control flow, so that the purpose of torsion adjustment is achieved.

Drawings

FIG. 1 is a schematic view of the internal structure of the present invention;

FIG. 2 is a schematic diagram of the structure of the present invention;

FIG. 3 is a schematic view of the structure of B-B in FIG. 1;

Fig. 4 is a schematic structural view of the driven gear shaft;

FIG. 5 is a schematic view of the structure of a pump connection block;

FIG. 6 is a schematic view of the structure of A-A in FIG. 5;

Reference numerals in the drawings: 1-pump front cover, 2-pump rear cover, 3-gear pump shell, 4-main shaft, 5-transmission gear shaft, 6-bearing, 7-pump connecting block, 8-front pump body, 9-rear pump body, 10-driven gear shaft, 11-through hole, 12-oil inlet, 13-shallow notch, 14-cavity, 15-through hole, 15-1-phi 6 hole, 15-2-phi 3 hole, 15-3-chamfer, 16-central hole, 17-sealing ring notch, 18-blind hole, 19-elastic pin, 20-steel ball, 21-outside sealing ring and 22-side special-shaped sealing ring.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.

Referring to fig. 1 to 6 for specific structure, the present embodiment provides a technical solution: the utility model provides a body-building equipment is with two-way inner loop automatic compensation hydraulic gear oil pump system, including pump protecgulum 1 and pump hou gai 2, be equipped with gear pump case 3 between pump protecgulum 1 and the pump hou gai 2, insert main shaft 4 in the pump protecgulum 1, main shaft 4 connects transmission gear shaft 5, there is pump connecting block 7 one end of transmission gear shaft 5 through bearing 6 cover, be equipped with outside sealing ring 21 between gear pump case 3 and the pump connecting block 7, the cover has preceding pump body 8 and back pump body 9 on the transmission gear shaft 5, be equipped with inboard dysmorphism sealing ring 22 between preceding pump body 8 and the pump connecting block 7. The transmission gear shaft 5 is connected with a driven gear shaft 10, the driven gear shaft 10 is arranged between the pump connecting block 7 and the pump rear cover 2, a through hole 11 is arranged in the driven gear shaft 10, an oil inlet 12 is arranged on the pump rear cover 2, and the through hole 11 is communicated with the oil inlet 12.

A shallow slot 13 is machined on the pump connecting block 7, the shallow slot 13 is communicated with two cavities 14 of an oil pump, through holes 15 are drilled on two sides of the pump connecting block 7, each through hole 15 is composed of phi 6 holes 15-1 on two sides and phi 3 holes 15-2 in the middle, a chamfer 15-3 is arranged between each phi 6 hole 15-1 and each phi 3 hole 15-2, the length of each chamfer 15-3 is 2.6mm, and the angle of each chamfer 15-3 is 30 degrees. A central hole 16 is drilled on the shallow slot 13 and is communicated with the through hole 15, the end face of the top of the pump connecting block 7 is provided with a sealing ring slot 17, two outer sides of the sealing ring slot 17 are both drilled with a blind hole 18, an elastic pin 19 is arranged in the blind hole 18 to limit a steel ball 20, and the steel ball 20 forms two unidirectional structures on chamfer angles at two sides of the through hole 15.

The invention mainly adds two one-way valve structures in the oil pump so as to realize circulation and balance of leakage oil of the oil pump between high and low pressure areas through the effect of the one-way valve during bidirectional use, thereby achieving the purpose of continuous circulation in a closed oil way, improving the stability of products, having simple structure and easy processing and reducing the production cost. According to the invention, a through hole 11 is formed in the driven gear shaft 10, an oil inlet of the pump rear cover 2 and the pump connecting block 7 can be directly connected, two cavities 14 of an oil pump are formed in the pump connecting block 7, a shallow groove 13 is formed in the pump connecting block 7 and communicated with the oil pump, a through hole 15 is drilled at two sides of the pump connecting block 7, a proper position is chamfered, a center hole 16 is drilled in the shallow groove 13 and communicated with the through hole 15, a blind hole 18 is drilled at the outer side of a sealing ring notch 17 at the top end surface of the pump connecting block 7 and used for installing an elastic pin 19 to limit a steel ball 20, and therefore, two unidirectional structures are formed on chamfer angles at two sides of the through hole 15 by the steel ball 20, which is equivalent to installing two opposite unidirectional valves at two sides of the pump connecting block 7.

When the hydraulic pump is used on fitness equipment and works in a closed internal circulation loop, the pressure difference between the high pressure area and the low pressure area can enable the steel balls on the two sides to move in one direction, the steel balls 20 on one side can be in close contact with the chamfer angles of the pump connecting block 7, the steel balls 20 on the other side are in a sealed state, the steel balls 20 on the other side can be in contact with the elastic pins 19, the steel balls are in an open state, and the two independent check valves on the two sides of the pump connecting block 7 are in an open state, and are in a closed state, so that leakage oil generated during the working of the oil pump can flow from the low pressure area to the high pressure area through the open check valve to reach the balance of an oil way. When the oil pump works bidirectionally, the high-low pressure area is continuously switched, the one-way valves on the two sides are also continuously switched, and the oil quantity in the oil way reaches a balanced state through the opening or closing of the one-way valves, so that the oil cannot overflow outwards.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, article, or apparatus.

Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art, that in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and that identical reference numerals are used to designate identical devices, and thus descriptions thereof will be omitted.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a bi-directional inner loop automatic compensation hydraulic gear oil pump system for body-building equipment, includes pump protecgulum (1) and pump hou gai (2), pump protecgulum (1) with be equipped with gear pump case (3) behind the pump between lid (2), insert main shaft (4) in pump protecgulum (1), main shaft (4) connect transmission gear axle (5), its characterized in that: one end of the transmission gear shaft (5) is sleeved with a pump connecting block (7) through a bearing (6), an outer sealing ring (21) is arranged between the gear pump shell (3) and the pump connecting block (7), a front pump body (8) and a rear pump body (9) are sleeved on the transmission gear shaft (5), the transmission gear shaft (5) is connected with a driven gear shaft (10), the driven gear shaft (10) is arranged between the pump connecting block (7) and the pump rear cover (2), a through hole (11) is formed in the driven gear shaft (10), an oil inlet (12) is formed in the pump rear cover (2), and the through hole (11) is communicated with the oil inlet (12);

The steel ball type hydraulic pump is characterized in that a shallow slot (13) is formed in the pump connecting block (7), the shallow slot (13) is communicated with two cavities (14) of the oil pump, a through hole (15) is drilled in two sides of the pump connecting block (7), the through hole (15) is formed by phi 6 holes (15-1) in two sides and phi 3 holes (15-2) in the middle, a chamfer (15-3) is arranged between the phi 6 holes (15-1) and the phi 3 holes (15-2), the length of the chamfer (15-3) is 2.6mm, the angle of the chamfer (15-3) is 30 degrees, a central hole (16) is drilled in the shallow slot (13) and is communicated with the through hole (15), the end face of the top of the pump connecting block (7) is a sealing ring notch (17), a blind hole (18) is drilled in two outer sides of the sealing ring notch (17), an elastic pin (19) is arranged in the blind hole (18) to limit steel balls (20), and the steel balls (20) are in two unidirectional structures on two sides of the chamfer (15) are formed.

2. The bi-directional internal circulation automatic compensation hydraulic gear oil pump system for exercise equipment of claim 1, wherein: an inner side special-shaped sealing ring (22) is arranged between the front pump body (8) and the pump connecting block (7).