阅读说明：本技术 柱塞泵斜盘摆角限位机构 (Swash plate swing angle limiting mechanism of plunger pump ) 是由 侯晓军 田璐 陆洋 王�琦 王浩 于 2020-11-16 设计创作，主要内容包括：本发明提出了柱塞泵摆角限位机构,属于液压类设备调节与控制装置,其包括控制壳体、控制棒、中位调整座、盖帽、弹性件连接座、弹性件、盖板和锁紧件,控制棒贯穿控制壳体的中空腔,控制棒的一端沿轴向设置有弹性件连接座,弹性件连接在弹性件连接座上,盖帽与弹性件连接座的一端部接触连接,中位调整座是沿轴向设置有通孔的套筒状结构,中位调整座与控制壳体螺纹连接,中位调整座套接在弹性件和弹性件连接座的外侧,盖帽的一端部伸入中位调整座的通孔内并与中位调整座的内壁固定连接,盖板与控制棒连接,中位调整座通过锁紧件进行锁紧。本发明能够实现斜盘摆角的大小控制,可以通过移动中位调整座在控制壳体中的深度进行调节。(The invention provides a swing angle limiting mechanism of a plunger pump, which belongs to a regulating and controlling device of hydraulic equipment and comprises a control shell, a control rod, a middle position regulating seat, a cover cap, an elastic part connecting seat, an elastic part, a cover plate and a locking part, wherein the control rod penetrates through a hollow cavity of the control shell, one end of the control rod is axially provided with the elastic part connecting seat, the elastic part is connected to the elastic part connecting seat, the cover cap is in contact connection with one end part of the elastic part connecting seat, the middle position regulating seat is in a sleeve-shaped structure provided with a through hole along the axial direction, the middle position regulating seat is in threaded connection with the control shell, the middle position regulating seat is sleeved outside the elastic part and the elastic part connecting seat, one end part of the cover cap extends into the through hole of the middle position regulating seat and is fixedly connected with the inner. The invention can realize the control of the swing angle of the swash plate and can adjust the swing angle by moving the depth of the middle adjusting seat in the control shell.)

1. The swing angle limiting mechanism of the plunger pump is characterized by comprising a control shell (1), a control rod (2), a middle position adjusting seat (3), a cover cap (4), an elastic part connecting seat (6), an elastic part (7), a cover plate (9) and a locking part (11), wherein the control rod (2) penetrates through a hollow cavity of the control shell (1), the elastic part connecting seat (6) is arranged at one end of the control rod (2) along the axial direction, the elastic part (7) is connected onto the elastic part connecting seat (6), the cover cap (4) is in contact connection with one end part of the elastic part connecting seat (6), the middle position adjusting seat (3) is of a tubular structure provided with a through hole along the axial direction, the middle position adjusting seat (3) is in threaded connection with the control shell (1), the middle position adjusting seat (3) is sleeved outside the elastic part (7) and the elastic part connecting seat (6), one end of the cover cap (4) extends into the through hole of the middle position adjusting seat (3) and is fixedly connected with the inner wall of the middle position adjusting seat (3), the cover plate (9) is connected with the control rod (2), and the middle position adjusting seat (3) is locked through the locking piece (11).

2. The swing angle limiting mechanism of the plunger pump according to claim 1, wherein the number of the elastic member connecting seats (6) is two, the elastic member connecting seats (6) are in a cone-barrel-shaped structure, the thin ends of the two elastic member connecting seats (6) are arranged oppositely, the thick end of each elastic member connecting seat (6) is provided with a limiting step along the radial direction, the thick end of one elastic member connecting seat (6) is in contact connection with the bottom wall of the middle adjusting seat (3), the thick end of the other elastic member connecting seat (6) is in contact connection with the cap (4), an elastic member moving gap is arranged between the two elastic member connecting seats (6), and two end parts of the elastic member (7) are respectively connected to the two elastic member connecting seats (6).

3. The plunger pump swing angle limiting mechanism according to claim 1, characterized in that the plunger pump swing angle limiting mechanism further comprises a connecting piece (5), a connecting hole is arranged at the end of the control rod (2) connected with the elastic piece connecting seat (6) along the axial direction of the control rod (2), and the connecting piece (5) extends into the connecting hole to connect the control rod (2) with the elastic piece connecting seat (6).

4. The swing angle limiting mechanism of the plunger pump according to claim 3, wherein the connecting hole is a threaded hole, and the connecting member (5) is a threaded connecting member extending into the threaded hole to connect the control rod (2) with the elastic member connecting seat (6).

5. The swing angle limiting mechanism of the plunger pump according to claim 4, characterized in that the cap (4) is provided with an external thread, the middle position adjusting seat (3) is provided with an internal thread which is matched and connected with the cap (4), and the cap (4) is in threaded connection with the middle position adjusting seat (3).

6. The swing angle limiting mechanism of the plunger pump as claimed in claim 5, characterized in that the side of the cap (4) opposite to the control rod (2) is provided with an internal groove, and the threaded connector extends into the internal groove and is fixedly connected with the cap (4).

7. The plunger pump swing angle limiting mechanism according to any one of claims 1 to 6, characterized in that the plunger pump swing angle limiting mechanism further comprises a connecting rod, and the control rod (2) is hinged with the cover plate (9) through the connecting rod.

8. The plunger pump pivot angle limiting mechanism according to claim 7, characterized in that the plunger pump pivot angle limiting mechanism further comprises a hinge (8), the control rod (2) is hinged with a connecting rod through the hinge (8), and the connecting rod is connected with the cover plate (9).

9. The swing angle limiting mechanism of the plunger pump as claimed in claim 8, wherein a sealing ring is arranged at the joint of the middle adjusting seat (3) and the cap (4).

Technical Field

The invention belongs to a regulating and controlling device of hydraulic equipment, in particular to a swing angle limiting mechanism of a plunger pump.

Background

The plunger pump is an important device of the hydraulic system. The plunger reciprocates in the cylinder body to change the volume of the sealed working cavity so as to absorb and press oil. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency, convenient flow regulation and the like. The method is widely applied to shipbuilding, oil exploitation, loaders and other equipment. The hydraulic plunger pump is one kind of plunger pump, controls the discharge capacity of liquid through the swash plate pivot angle on the hydraulic plunger pump when using, thereby control the pump pressure, consequently, the pivot angle control of swash plate is more crucial one step, generally restrict the pivot angle of swash plate through the piston motion at both ends in the servo chamber among the prior art, or restrict the pivot angle of swash plate through set up the displacement pole in swash plate both sides, the size of restricting the swash plate pivot angle through the position removal of displacement pole, thereby control the discharge capacity of pump, but this kind of regulation mode structure is complicated, the technological requirement is high, the reliability is low.

Disclosure of Invention

Aiming at the problems of complex structure, high process requirement and low reliability of the existing hydraulic plunger pump, the invention provides a swing angle limiting mechanism of the plunger pump, which has the following specific technical scheme:

plunger pump pivot angle stop gear, including control housing, control rod, meso position adjustment seat, block, elastic component connecting seat, elastic component, apron and retaining member, the control rod runs through the well cavity of control housing, the one end of control rod is provided with the elastic component connecting seat along the axial, the elastic component is connected on the elastic component connecting seat, a tip contact connection of block and elastic component connecting seat, the meso position adjustment seat is along the sleeve column structure that the axial is provided with the through-hole, meso position adjustment seat and control housing threaded connection, the meso position adjustment seat cup joints the outside at elastic component and elastic component connecting seat, a tip of block stretch into in the through-hole of meso position adjustment seat and with the inner wall fixed connection of meso position adjustment seat, the apron is connected with the control rod, the meso position adjustment seat is locked through the retaining member.

Further inject, the elastic component connecting seat has two, just the elastic component connecting seat is awl bucket column structure, and the tip of two elastic component connecting seats sets up relatively, the butt of elastic component connecting seat is along radially being provided with spacing step, and the butt of one elastic component connecting seat is connected with the diapire contact of meso position adjustment seat, and the butt of another elastic component connecting seat is connected with the block contact, is provided with the elastic component clearance of activity between two elastic component connecting seats, the both ends of elastic component are connected respectively on two elastic component connecting seats.

Further inject, plunger pump pivot angle stop gear still includes the connecting piece, the tip that control rod and elastic component connecting seat are connected is provided with the connecting hole along the axial of control rod, the connecting piece extends to and is connected control rod and elastic component connecting seat in the connecting hole.

Further limit, the connecting hole is the screw hole, the connecting piece is threaded connection spare, threaded connection spare extends to and is connected control rod and elastic component connecting seat in the screw hole.

Further limiting, an external thread is arranged on the cap, an internal thread matched and connected with the cap is arranged on the middle position adjusting seat, and the cap is in threaded connection with the middle position adjusting seat.

Further limit, one side of the cap, which is opposite to the control rod, is provided with an internal connection groove, and the threaded connecting piece extends into the internal connection groove to be fixedly connected with the cap.

Further inject, plunger pump pivot angle stop gear still includes the connecting rod, the control rod passes through the connecting rod and hinges with the apron.

Further inject, plunger pump pivot angle stop gear still includes the articulated elements, the control rod passes through the articulated elements and articulates with the connecting rod, the connecting rod is connected with the apron.

Further limit, a sealing ring is arranged at the joint of the middle adjusting seat and the cover cap.

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

1. an elastic piece connecting seat is axially arranged at one end part of a control rod on a swing angle limiting mechanism of the plunger pump, an elastic piece is connected to the elastic piece connecting seat, a cap is fixedly connected with the elastic piece connecting seat in a contact manner, two elastic piece connecting seats are arranged, the two elastic piece connecting seats are both in cone-barrel-shaped structures, a limiting step is arranged at the thick end of each elastic piece connecting seat, the thin ends of the two elastic piece connecting seats are oppositely arranged, the elastic piece is connected between the two cone-barrel-shaped structures, and an elastic piece moving gap is arranged between the two elastic piece connecting seats; one end part of the nut cap extends into the through hole of the middle position adjusting seat and is fixedly connected with the inner wall of the middle position adjusting seat, the middle position adjusting seat is fixedly connected with the control shell, the middle position adjusting seat is sleeved on the elastic piece and the outer side of the elastic piece connecting seat, and the cover plate is hinged with the control rod. When the device is used, the cover plate is hinged with the swash plate, the control rod can be driven to move back and forth along the axial direction of the control rod by pushing the cap to slide along the inner wall of the middle adjusting seat, and then the swash plate is driven to rotate to a certain angle by the cover plate, so that the size control and adjustment of the swing angle of the swash plate are realized; when the spring is in a loose state, the spring is limited through the elastic piece connecting seat and the middle adjusting seat, so that the swash plate is just adjusted to the middle position. The whole mechanism has the advantages of simple structure, convenient installation, low cost, stable quality and high reliability, and can adapt to the control and the limit of the hydraulic variable swash plate.

2. The nut cap is connected with the connecting piece, the end part of the control rod is provided with a connecting hole, and the connecting piece extends into the connecting hole to connect the control rod with the nut cap, so that the connection process is convenient, and the disassembly of the nut cap and the control rod can be facilitated.

3. An inner connecting groove is formed in one side, opposite to the control rod, of the cap, and the threaded connecting piece extends into the inner connecting groove and is fixedly connected with the cap. The connection between the cap and the connecting piece is firmer through the internal connecting groove, and the installation space is saved.

4. The control rod is hinged with the connecting rod through the hinge piece, and the connecting rod is hinged with the cover plate, so that the control rod, the connecting rod and the cover plate form a connecting rod mechanism, and the adjustment is more flexible.

Drawings

FIG. 1 is a schematic structural view of a swing angle limiting mechanism of a plunger pump according to the present invention;

wherein: the control device comprises a control shell 1, a control rod 2, a middle adjusting seat 3, a cap 4, a connecting piece 5, an elastic piece connecting seat 6, an elastic piece 7, an articulated piece 8, a cover plate 9, a swash plate 10 and a locking piece 11.

Detailed Description

The technical solutions of the present invention will be further explained below with reference to the drawings and examples, but the present invention is not limited to the embodiments explained below.

The invention discloses a swing angle limiting mechanism of a plunger pump, which comprises a control shell 1, a control rod 2, a middle adjusting seat 3, a cover cap 4, an elastic piece connecting seat 6, an elastic piece 7, a cover plate 9 and a locking piece 11, the well cavity of control rod 2 through control housing 1, the one end of control rod 2 is provided with elastic component connecting seat 6 along the axial, elastic component 7 is connected on elastic component connecting seat 6, block 4 is connected with an end contact of elastic component connecting seat 6, meso position adjustment seat 3 is the cover tube column structure that is provided with the through-hole along the axial, meso position adjustment seat 3 and control housing 1 threaded connection, meso position adjustment seat 3 cup joints in the outside of elastic component 7 and elastic component connecting seat 6, a tip of block 4 stretches into in the through-hole of meso position adjustment seat 3 and with the inner wall fixed connection of meso position adjustment seat 3, apron 9 is connected with control rod 2, meso position adjustment seat 3 locks through retaining member 11. Elastic component connecting seat 6 has two, and elastic component connecting seat 6 is awl bucket column structure, the tip of two elastic component connecting seats 6 sets up relatively, the butt of elastic component connecting seat 6 is along radially being provided with spacing step, the butt of an elastic component connecting seat 6 is connected with the diapire contact of meso position adjustment seat 3, the butt of another elastic component connecting seat 6 is connected with block 4 contact, be provided with elastic component clearance between two elastic component connecting seats 6, the both ends of elastic component 7 are connected respectively on two elastic component connecting seats 6. The swing angle limiting mechanism of the plunger pump further comprises a connecting piece 5, a connecting hole is formed in the end portion, connected with the elastic piece connecting seat 6, of the control rod 2 along the axial direction of the control rod 2, and the connecting piece 5 extends into the connecting hole to connect the control rod 2 with the elastic piece connecting seat 6. The connecting hole is a threaded hole, the connecting piece 5 is a threaded connecting piece, and the threaded connecting piece extends into the threaded hole to connect the control rod 2 with the elastic piece connecting seat 6. Be provided with the external screw thread on the block 4, be provided with the internal thread of being connected with the block 4 cooperation on the meso position adjustment seat 3, block 4 and meso position adjustment seat 3 threaded connection. And one side of the cap 4, which is opposite to the control rod 2, is provided with an internal connection groove, and the threaded connecting piece extends into the internal connection groove and is fixedly connected with the cap 4.

The swing angle limiting mechanism of the plunger pump further comprises a connecting rod, and the control rod 2 is hinged with the cover plate 9 through the connecting rod.

The swing angle limiting mechanism of the plunger pump further comprises a hinge 8, the control rod 2 is hinged with a connecting rod through the hinge 8, and the connecting rod is connected with the cover plate 9.

A sealing ring is arranged at the joint of the middle adjusting seat 3 and the cap 4.

The depth of the middle position adjusting seat 3 in the control shell 1 can be adjusted through threads, and the depth of the middle position adjusting seat 3 can determine the middle position of the hinge joint 8. The cap 4 drives the middle adjusting seat 3 to screw in or out in the control housing 1, and drives the connecting piece 5 and the control rod 2 to move in or out of the control housing 1 together, so as to drive one elastic piece connecting seat 6 to move in or out until contacting with or being far away from the other elastic piece connecting seat 6, and the elastic piece 7 can ensure that the elastic piece connecting seat 6 is restored to the original position. The moving distance H can be changed by grinding the length dimension of the elastic member connecting seat 6. The moving distance of the two elastic piece connecting seats 6, namely the moving distance of the control rod 2 limits the swing angle of the swash plate. The position of the middle adjusting seat 3 is fixed through the locking piece 11 to ensure the middle position of the swash plate and the moving distance of the control rod 2, and finally the reliability of the swing angle of the plunger pump is limited.

Example 1

Referring to fig. 1, the swing angle limiting mechanism of the plunger pump in the embodiment includes a control housing 1, a control rod 2, a middle position adjusting seat 3, a cap 4, a connecting member 5, an elastic member connecting seat 6, an elastic member 7, a hinge member 8, a connecting rod and cover plate 9, and a locking member 11. The hinged part 8 is a hinged pin, the elastic part 7 is a spring, the control rod 2 penetrates through the hollow cavity of the control shell 1, the elastic part connecting seats 6 are arranged at one end part of the control rod 2, two elastic part connecting seats 6 are arranged, the two elastic part connecting seats 6 are both in a cone-barrel-shaped structure, a limiting step is arranged at the thick end of each elastic part connecting seat 6 along the radial direction, the two elastic part connecting seats 6 are both sleeved on the control rod 2 along the control rod 2, the thin ends of the two elastic part connecting seats 6 are oppositely arranged, the thick end of one elastic part connecting seat 6 is in contact connection with the bottom wall of the middle position adjusting seat 3, and the thick end of the other elastic part connecting seat 6 is in contact connection with; two end parts of the elastic part 7 are respectively connected with the two elastic part connecting seats 6, and an elastic part moving gap is arranged between the two elastic part connecting seats 6; the cap 4 is fixedly connected with the middle position adjusting seat 3, the connecting piece 5 is a screw, a connecting hole is formed in the end part, connected with the elastic connecting piece 6, of the control rod 2 along the axial direction of the control rod 2, the connecting hole is a threaded hole, one end with threads on the screw extends into the threaded hole to connect the control rod 2 with the elastic connecting seat 6, and the elastic connecting seat 6 can be limited through the connecting piece 5; the middle position adjusting seat 3 is a sleeve-shaped structure provided with a through hole along the axial direction, the outer wall of the middle position adjusting seat 3 is in threaded connection with the control shell 1, the middle position adjusting seat 3 is sleeved outside the elastic part 7 and the elastic part connecting seat 6, one end part of the cap 4 extends into the through hole of the middle position adjusting seat 3 and is fixedly connected with the inner wall of the middle position adjusting seat 3, and a sealing ring is arranged at the connection part of the middle position adjusting seat 3 and the cover plate 4; the middle part of the control rod 2 is hinged with the connecting rod through a hinge pin, the connecting rod is hinged with the cover plate 9, the cover plate 9 is hinged below the connecting rod, the locking part 11 is fixedly connected to the control shell 1, and the middle position adjusting seat 3 is locked and limited through the locking part 11.

When the plunger pump is used, the swash plate 10 is hinged below the cover plate 9, the control rod 2 is pushed, the control rod 2 moves along the inner wall of the shell 1, the swash plate 10 is driven to rotate through the cover plate 9, the movement direction and the stroke of the swing angle of the swash plate 10 are adjusted, and therefore the discharge capacity and the output pressure of the plunger pump are adjusted; when the spring is in a loose state, the spring is limited through the middle position adjusting seat 3 and the elastic piece connecting seat 6, the adjustable swash plate 10 is just in the middle position, the whole mechanism is simple in structure, convenient to install, low in cost, stable in quality, high in reliability, capable of adapting to control and limitation of the hydraulic variable swash plate, and wide in application range.

Example 2

The swing angle limiting mechanism of the plunger pump comprises a control shell 1, a control rod 2, a middle position adjusting seat 3, a cap 4, a connecting piece 5, an elastic piece connecting seat 6, an elastic piece 7, a hinge piece 8, a connecting rod and a cover plate 9, wherein the hinge piece 8 is a threaded rod, the elastic piece 7 is an elastic rubber block, the control rod 2 penetrates through a hollow cavity of the control shell 1, one end part of the control rod 2 is provided with two elastic piece connecting seats 6, the two elastic piece connecting seats 6 are in cone-barrel-shaped structures, the thick end of the elastic piece connecting seat 6 is provided with a limiting step along the radial direction, the two elastic piece connecting seats 6 are sleeved on the control rod 2 along the axial direction of the control rod 2, the thin ends of the two elastic element connecting seats 6 are oppositely arranged, the thick end of one elastic element connecting seat 6 is in contact connection with the bottom wall of the middle adjusting seat 3, and the thick end of the other elastic element connecting seat 6 is in contact connection with the cap 4; two end parts of the elastic piece 7 are respectively connected to the two elastic piece connecting seats 6, and an elastic piece moving gap is arranged between the two elastic piece connecting seats 6; the end face of one side, opposite to the control rod 2, of the cap 4 is in contact connection with the elastic piece connecting seat 6, an internally-connected groove connecting piece 5 is arranged on the end face of one side, opposite to the control rod 2, of the cap 4, a limiting block is arranged at one end of the threaded rod, a connecting hole is formed in the end, connected with the elastic piece 6, of the control rod 2 along the axial direction of the control rod 2, the connecting hole is a threaded hole, the non-limiting block connecting end of the threaded rod extends into the threaded hole to connect the control rod 2 with the elastic piece connecting seat 6; the limiting block is fixed in the inner connecting groove, the middle position adjusting seat 3 is of a sleeve-shaped structure provided with a through hole along the axial direction, the outer wall of the middle position adjusting seat 3 is in threaded connection with the control shell 1, the middle position adjusting seat 3 is sleeved on the outer sides of the elastic part 7 and the elastic part connecting seat 6, one end part of the cap 4 extends into the through hole of the middle position adjusting seat 3 and is fixedly connected with the inner wall of the middle position adjusting seat 3, and a sealing ring is arranged at the connecting part of the middle position adjusting seat 3 and the cover plate 4; the middle part of the control rod 2 is hinged with the connecting rod through a hinge pin, the connecting rod is hinged with a cover plate 9, and the cover plate 9 is hinged below the connecting rod.

When the plunger pump is used, the swash plate 10 is hinged below the cover plate 9, the cover cap 4 is pushed to drive the swash plate 10 to rotate through the cover plate 9, and the movement direction and the stroke of the swing angle of the swash plate 10 are adjusted, so that the displacement and the output pressure of the plunger pump are adjusted; when the elastic rubber block is in a loose state, the spring is limited through the middle position adjusting seat 3 and the elastic piece connecting seat 6, the adjustable swash plate 10 is just in the middle position, the whole mechanism is simple in structure, convenient to install, low in cost, stable in quality, high in reliability, capable of adapting to control and limitation of the hydraulic variable swash plate, and wide in application range.