CN111852855A

CN111852855A - Bidirectional internal circulation automatic compensation hydraulic gear oil pump system for fitness equipment

Info

Publication number: CN111852855A
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: 2020-10-30
Anticipated expiration: 2040-08-06
Also published as: CN111852855B

Abstract

The invention relates to a bidirectional internal circulation automatic compensation hydraulic gear oil pump system for fitness 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 in the pump front cover and 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 formed 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 that increases two check valves in opposite directions in two-way hydraulic gear oil pump inside for the oil inlet can only flow to oil pump inside, and the oil pump is inside can not flow to the oil inlet, and high-pressure region oil can not flow to oilcan department, prevents the loss of oil in the oil circuit, and the oil mass is still in balanced state.

Description

Bidirectional internal circulation automatic compensation hydraulic gear oil pump system for fitness equipment

Technical Field

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

Background

Conventional hydraulic bidirectional gear oil pumps rely on two or more gears and cylinders sealed in a housing to separate the suction and discharge chambers. The pump has an oil inlet and an oil outlet, the oil inlet is connected with an oil tank, the oil outlet is connected with components of a hydraulic system to drive the hydraulic components to work, when gears rotate, the volume of a working space generated in the process of mutual meshing changes to convey liquid, the pump can rotate in a positive and negative direction, and the pump shafts can supply oil in the same direction in an equivalent manner when rotating in the positive direction and the reverse direction. The hydraulic pump adopts clearance seal in the high-low pressure area, so that leakage is inevitable, and leakage oil is continuously generated and flows back to the oil tank through an oil drain port.

When using traditional two-way gear pump as adjusting the pivot moment of torsion, because need a great oil tank, some occasions are unsuitable because of the space restriction, and the switching of business turn over hydraulic fluid port is more difficult, if adopt inner loop structure (this kind of structure can not use the oil tank), because the oil pump itself has the problem of revealing, in the in-process of using, the oil of revealing that produces always can discharge back to in the oil tank of the department of revealing hydraulic fluid port, the confined oil circuit can not be supplemented, the moment of torsion that provides just so is very unstable, treat that oil reveals when a certain amount, the oil pump has just lost the effect, and refuel also difficult.

The oil pump in the prior art 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 fitness equipment, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a two-way inner loop automatic compensation hydraulic gear oil pump system for body-building apparatus, lid behind pump protecgulum and the pump, be equipped with the gear pump case behind pump protecgulum and the pump between the lid, the main shaft has been inserted in the pump protecgulum, the transmission gear axle is connected to the main shaft, the one end of transmission gear axle has the pump connecting block through the bearing cover, the epaxial cover of transmission gear has preceding pump body and back pump body, the transmission gear axle is connected with the driven gear axle, the 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 to open behind the.

The invention is further improved in that: processing a shallow notch on the pump connecting block, shallow notch intercommunication two cavitys of oil pump, drilling a through hole in pump connecting block both sides, drilling a centre bore and through hole intercommunication from the shallow notch, pump connecting block top end face is the sealing ring notch, and a blind hole is all drilled in two outsides of sealing ring notch, and installation elastic pin comes spacing steel ball in the blind hole, and the steel ball has formed two one-way structure on the chamfer of through hole both sides.

The invention is further improved in that: the through hole consists of phi 6 holes at 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 is further improved in that: the length of the chamfer was 2.6mm and the angle of the chamfer was 30 °.

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

The invention is further improved in that: an inner 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:

according to the invention, a through hole is processed on the driven gear shaft and is communicated with the overflow port on the pump rear cover, and the small oil can is connected to the overflow port, so that the original overflow port is changed into an oil filling port. By adding the structure of two opposite one-way valves in the two-way hydraulic gear oil pump, the oil inlet can only flow to the inside of the oil pump, the inside of the oil pump can not flow to the oil inlet, the pressure difference of high pressure and low pressure generated when the oil pump works can enable one of the two opposite one-way valves to be in a sealing state and one to be in an opening state, when the pressure of a low-pressure area is smaller than the pressure of an oil inlet can, the one-way valve at the side is in the opening state, oil at a gear flows into the low-pressure area through the one-way valve and is automatically added and compensated with the oil can to the oil in the oil circuit, the pressure of the oil inlet can is smaller than the pressure of a high-pressure area (at the moment, the one-way valve at the side is closed), the oil in the high-pressure area can not flow to the oil can, the loss of the oil in the oil circuit is prevented, the leaked oil generated, the oil drain port of the traditional bidirectional gear pump forms the oil inlet of the bidirectional gear pump, and meanwhile, a throttle valve can be arranged on a loop where the oil pump is located so as to control the flow, so that the purpose of adjusting the torque force is achieved.

Description of the drawings:

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

FIG. 2 is a schematic structural view of the present invention;

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

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

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

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

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

The specific implementation mode is as follows:

the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

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

Referring to fig. 1 to 6, the present embodiment provides a technical solution: the utility model provides a two-way inner loop automatic compensation hydraulic gear oil pump system for body-building apparatus, lid 2 behind pump protecgulum 1 and the pump, be equipped with gear pump case 3 behind pump protecgulum 1 and the pump between the lid 2, the main shaft 4 has been inserted in the pump protecgulum 1, transmission gear axle 5 is connected to main shaft 4, the one end of transmission gear axle 5 has pump connecting block 7 through 6 covers of bearing, 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 the back pump body 9 on the transmission gear axle 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 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.

A shallow notch 13 is formed in the pump connecting block 7, the shallow notch 13 is communicated with two cavities 14 of the oil pump, a through hole 15 is drilled in each of two sides of the pump connecting block 7, each through hole 15 is composed of 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 each chamfer 15-3 is 2.6mm, and the angle of each chamfer 15-3 is 30 degrees. A central hole 16 is drilled from a shallow groove opening 13 and is communicated with a through hole 15, the top end face of the pump connecting block 7 is a sealing ring groove opening 17, blind holes 18 are drilled on two outer sides of the sealing ring groove opening 17, an elastic pin 19 is installed in each blind hole 18 to limit steel balls 20, and the steel balls 20 form two one-way structures on chamfers on two sides of the through hole 15.

The invention mainly adds two one-way valve structures in the oil pump to achieve the purposes of circulating and balancing leaked oil of the oil pump between high and low pressure areas through the action of the one-way valve when the oil pump is used bidirectionally, achieving the purpose of ceaseless circulation in a closed oil path, improving the stability of a product, and having simple structure, easy processing and reduced production cost. The invention processes a through hole 11 on the driven gear shaft 10, which can directly connect the oil inlet of the pump back cover 2 and the pump connecting block 7, processes a shallow notch 13 on the pump connecting block 7 to connect two cavities 14 of the oil pump, drills a through hole 15 on both sides of the pump connecting block 7, and chamfers at proper position, drills a central hole 16 from the shallow notch 13 to connect with the through hole 15, drills a blind hole 18 on the outside of the top end face sealing ring notch 17 of the pump connecting block 7 to mount an elastic pin 19 to limit the steel ball 20, so the steel ball 20 forms two one-way structures on the chamfers on both sides of the through hole 15, which is equivalent to mount two opposite one-way valves on both sides of the pump connecting block 7.

When the hydraulic pump is applied to the body-building 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 two sides to move towards one direction, the steel ball 20 on one side can be in close contact with a chamfer of the pump connecting block 7 and is in a sealed state, the steel ball 20 on the other side can be in contact with the elastic pin 19 and is in an open state, namely, one of two independent check valves on two sides of the pump connecting block 7 is in an open state and one is in a closed state, so that leaked oil generated when the hydraulic pump works can flow from the low-pressure area to the high-pressure area through the open check valve to achieve the balance of an oil path. Therefore, when the oil pump works in two directions, the high-pressure area and the low-pressure area are switched continuously, the one-way valves on the two sides are also switched continuously, the oil quantity in the oil way reaches a balanced state through the opening or closing of the one-way valves, and 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 example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements 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 … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship 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 of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (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 only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and the same devices are denoted by the same reference numerals, and thus the description thereof will be omitted.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments 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 body-building apparatus is with two-way inner loop automatic compensation hydraulic gear oil pump system, lid (2) behind pump protecgulum (1) and the pump, pump protecgulum (1) with be equipped with gear pump case (3) behind the pump between lid (2), main shaft (4) have been inserted in pump protecgulum (1), transmission gear shaft (5), its characterized in that are connected in main shaft (4): the pump is characterized in that a pump connecting block (7) is sleeved at one end of the transmission gear shaft (5) through a bearing (6), 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 in the pump connecting block (7) and between the pump rear covers (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).

2. The bidirectional internal circulation automatic compensation hydraulic gear oil pump system for the fitness equipment as recited in claim 1, wherein: processing a shallow notch (13) on pump connecting block (7), shallow notch (13) two cavities (14) of intercommunication oil pump connecting block (7) both sides are bored a through hole (15), follow bore a centre bore (16) on shallow notch (13) with through hole (15) intercommunication, pump connecting block (7) top terminal surface is sealing ring notch (17), a blind hole (18) are all bored in two outsides of sealing ring notch (17), installation elastic pin (19) come spacing steel ball (20) in blind hole (18), steel ball (20) have formed two one-way structures on the chamfer of through hole (15) both sides.

3. The bidirectional internal circulation automatic compensation hydraulic gear oil pump system for the fitness equipment as recited in claim 2, wherein: the through hole (15) is composed of phi 6 holes (15-1) at two sides and phi 3 holes (15-2) in the middle, and a chamfer (15-3) is arranged between the phi 6 holes (15-1) and the phi 3 holes (15-2).

4. The bidirectional internal circulation automatic compensation hydraulic gear oil pump system for the fitness equipment as claimed in claim 3, wherein: the length of the chamfer (15-3) is 2.6mm, and the angle of the chamfer (15-3) is 30 degrees.

5. The bidirectional internal circulation automatic compensation hydraulic gear oil pump system for the fitness equipment as recited in claim 1, wherein: an outer side sealing ring (21) is arranged between the gear pump shell (3) and the pump connecting block (7).

6. The bidirectional internal circulation automatic compensation hydraulic gear oil pump system for the fitness equipment as recited in claim 1, wherein: an inner special-shaped sealing ring (22) is arranged between the front pump body (8) and the pump connecting block (7).