WO2021254145A1 - 一种液压破碎锤的中缸体密封结构 - Google Patents

一种液压破碎锤的中缸体密封结构 Download PDF

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WO2021254145A1
WO2021254145A1 PCT/CN2021/097854 CN2021097854W WO2021254145A1 WO 2021254145 A1 WO2021254145 A1 WO 2021254145A1 CN 2021097854 W CN2021097854 W CN 2021097854W WO 2021254145 A1 WO2021254145 A1 WO 2021254145A1
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sealing
dust
boss
piston
middle cylinder
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PCT/CN2021/097854
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English (en)
French (fr)
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林雨才
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台州贝力特机械有限公司
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Publication of WO2021254145A1 publication Critical patent/WO2021254145A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials

Definitions

  • the utility model belongs to the technical field of breaking hammers, and relates to a hydraulic breaking hammer, in particular to a sealing structure of the middle cylinder of the hydraulic breaking hammer.
  • the breaker is usually installed on excavators, loaders or power stations. It has the advantages of large impact, convenient use, good maneuverability and high efficiency. It is mainly used for crushing, demolition, and excavation of hard layers in construction. .
  • the breaking hammer generally includes a front cylinder, a middle cylinder, a rear cylinder, a drill rod and a piston. The drill rod is set in the front cylinder, the piston is set in the middle cylinder, and the piston reciprocates and strikes along the axial direction of the middle cylinder. Drill rod.
  • China Patent Network discloses a kind of seal structure of the breaker movement [Authorization Announcement Number: CN202251955U], including the front cylinder block, the middle cylinder block, the rear cylinder block, the piston and the drill rod.
  • the piston is installed inside the middle cylinder block.
  • the drill rod is located inside the front cylinder and directly below the piston.
  • Four annular grooves are sequentially opened on the inner wall of the front end of the middle cylinder. Oil seal and buffer ring.
  • the sealing lips of the dust seal, the first main oil seal, the second main oil seal and the buffer oil seal are all in close contact with the outer peripheral surface of the piston, in order to ensure the dust seal, the first main oil seal, the second main oil seal and the buffer oil seal It can be smoothly fitted into the annular groove.
  • the usually adopted design is that the size of the annular groove is larger than the size of each sealing element.
  • the front side wall of each sealing element and the annular groove The inner front side wall is attached, and there is a gap between the rear side wall of each sealing member and the rear side wall in the annular groove.
  • a gap is formed between the bottom surfaces.
  • the dust in the front cylinder enters the middle cylinder through the gap between the seal and the side wall of the seal groove, causing the hydraulic oil in the middle cylinder to be affected.
  • Contamination causes the hydraulic oil to turn black, and the hydraulic oil is used to drive the piston.
  • the contaminated hydraulic oil then acts on the piston, causing uneven force on the piston, causing the piston and cylinder to become rough.
  • a sealing structure for a middle cylinder of a hydraulic breaking hammer includes a middle cylinder and a piston slidably arranged in the middle cylinder.
  • a dust-proof sealing ring is arranged in the sealing groove, and the dust-proof sealing ring abuts against the outer peripheral surface of the piston.
  • the inner wall of the middle cylinder is located on the front side of the sealing groove and has an annular sealing surface.
  • the inner diameter of the dust seal ring must be smaller than the outer diameter of the piston; so when the dust seal ring is assembled in the seal groove, the inner peripheral surface of the seal boss After abutting against the sealing surface, the piston is inserted into the dust-proof sealing ring.
  • the dust-proof sealing ring undergoes a certain degree of deformation so that the dust-proof sealing ring closely adheres to the outer peripheral surface of the piston.
  • the table forms a certain squeezing effect, so that the inner circumferential surface of the sealing boss and the sealing surface are further closely attached, and when the piston reciprocates in the middle cylinder, the inner circumferential surface of the sealing boss and the sealing surface are always tight
  • the dust-proof seal ring is deformed forward, which will further squeeze the sealing boss, making the inner peripheral surface of the sealing boss and the sealing surface more closely adhere to avoid Dust enters the middle cylinder body through the gap between the dust-proof seal ring and the inner wall of the seal groove, reducing the risk of contamination of the hydraulic oil in the middle cylinder body.
  • the dust-proof seal ring includes a dust-proof lip, the outer end of the dust-proof lip is in contact with the outer peripheral surface of the piston, and one end of the sealing boss Connect with the root of the dust lip.
  • the thickness of the sealing boss in the radial direction gradually increases from the outer end to the root of the sealing boss.
  • the outer peripheral surface of the sealing boss is a conical surface.
  • the included angle between the sealing boss and the dust lip is less than 90°.
  • the included angle between the sealing boss and the dust lip is 30°-40°.
  • the inner circumferential surface of the dust-proof seal ring has a supporting boss in an annular shape, and the supporting boss has a circumference that abuts against the outer circumferential surface of the piston. noodle.
  • the arrangement of the circumferential surface increases the contact area between the support boss and the piston, plays a role of guiding and supporting the forward and backward movement of the piston, and improves the stability of the forward and backward movement of the piston.
  • the supporting boss is arranged inwardly with respect to the dustproof lip.
  • the supporting boss mainly plays the role of supporting and guiding the piston.
  • the supporting boss is arranged inward relative to the dust lip to prevent the dust outside the middle cylinder from directly entering between the circumferential surface and the outer circumferential surface of the piston. between.
  • the cross section of the supporting boss is trapezoidal.
  • the cross-section of the supporting boss is a trapezoidal structure, so that the supporting boss has better structural strength and further improves the supporting effect of the piston.
  • the supporting boss is provided with an oil gap.
  • the piston When the piston is running dry, the piston moves forward, and the hydraulic oil in the middle cylinder is squeezed to the dust seal ring. If the hydraulic oil is not discharged, the dust seal ring will be squeezed out of the seal groove, which will cause the piston to fuzz; Through the setting of this structure, the hydraulic oil is squeezed between the support boss and the dust lip through the oil gap. Because the outer end of the dust lip is easy to deform, the hydraulic oil pressure can easily pass between the dust lip and the piston. The gap directly flows out of the middle cylinder.
  • the sealing structure of the cylinder block of the hydraulic breaker of the present invention has the following advantages: when the dust-proof sealing ring is assembled in the sealing groove, the inner peripheral surface of the sealing boss and the sealing surface abut, The piston is inserted in the dust seal, the dust seal is deformed to a certain degree so that the dust seal is closely attached to the outer peripheral surface of the piston, and the dust seal is deformed to form a certain squeezing effect on the sealing boss , So that the inner circumferential surface of the sealing boss and the sealing surface are further closely attached, and when the piston reciprocates in the middle cylinder, the inner circumferential surface of the sealing boss and the sealing surface always keep close contact state, especially the piston When the striker rod is moved forward, the entire dust-proof sealing ring deforms forward, which further squeezes the sealing boss, making the inner peripheral surface of the sealing boss and the sealing surface closer and avoiding dust from passing through the dust-proof sealing ring and The gap between the inner walls of the sealing groove enters the middle cylinder body,
  • Figure 1 is a schematic cross-sectional view of the utility model.
  • Fig. 2 is an enlarged schematic view of the structure of part A in Fig. 1.
  • Fig. 3 is a schematic diagram of an enlarged structure of part B in Fig. 2.
  • Figure 4 is a schematic diagram of the three-dimensional structure of the dust-proof seal ring of the present invention.
  • Middle cylinder 11. Seal groove; 12. Seal surface; 2. Piston; 3. Dust seal ring; 31. Seal boss; 31a. Conical surface; 32. Dust lip; 33. Support Boss; 331, circumferential surface; 332, oil gap; 4. spacing.
  • the central cylinder sealing structure of the hydraulic breaker includes a central cylinder 1 and a piston 2 slidably arranged in the central cylinder 1.
  • the central cylinder sealing structure A sealing groove 11 is provided on the inner peripheral surface including the front end of the middle cylinder body 1, and a dust sealing ring 3 is arranged in the sealing groove 11.
  • the dust sealing ring 3 includes a dust lip 32, and the outer end of the dust lip 32 and the piston 2
  • the inner wall of the middle cylinder block 1 is located on the front side of the sealing groove 11 and has an annular sealing surface 12 with a distance 4 between the sealing surface 12 and the outer peripheral surface of the piston 2.
  • annular sealing boss 31 on the side surface, one end of the sealing boss 31 is connected with the root of the dust-proof lip 32, and the inner peripheral surface of the sealing boss 31 abuts against the sealing surface 12.
  • the inner diameter of the dust seal ring 3 must be smaller than the outer diameter of the piston 2; therefore, when the dust seal ring 3 is assembled in the seal groove 11, After the inner peripheral surface of the sealing boss 31 abuts the sealing surface 12, the piston 2 is inserted into the dust-proof seal ring 3.
  • the dust-proof lip 32 undergoes a certain degree of deformation so that the outer end of the dust-proof lip 32 is in contact with the piston 2
  • the outer peripheral surface closely fits, the dust lip 32 deforms and forms a certain pressing effect on the sealing boss 31, so that the inner peripheral surface of the sealing boss 31 and the sealing surface 12 are further closely attached, and when the piston 2 is in the middle cylinder 1.
  • the inner peripheral surface of the sealing boss 31 and the sealing surface 12 always remain in close contact, especially when the piston 2 moves forward to strike the drill rod, the dustproof seal 3 is deformed forward as a whole, and then Further squeeze the sealing boss 31, so that the inner peripheral surface of the sealing boss 31 and the sealing surface 12 are more closely attached to prevent dust from entering the middle cylinder body 1 through the gap between the dust-proof sealing ring 3 and the inner wall of the sealing groove 11 It reduces the risk of contamination of the hydraulic oil in the middle cylinder block 1.
  • the thickness of the sealing boss 31 in the radial direction gradually increases from the outer end of the sealing boss 31 to the root direction.
  • the outer peripheral surface of the sealing boss 31 is a conical surface 31a, and the piston 2 moves forward to strike
  • the entire dust-proof seal ring 3 is deformed forward, which further squeezes the sealing boss 31.
  • This structure helps the inner peripheral surface of the sealing boss 31 and the sealing surface 12 to be in close contact.
  • the angle between the sealing boss 31 and the dust-proof lip 32 is less than 90°. In this embodiment, the angle between the sealing boss 31 and the dust-proof lip 32 is 30°-40°. This structure makes dust-proof After the lip 32 is deformed, it can squeeze the sealing boss 31, so that the inner peripheral surface of the sealing boss 31 is in close contact with the sealing surface 12.
  • the inner circumferential surface of the dust seal 3 has an annular support boss 33.
  • the support boss 33 is arranged inwardly with respect to the dust lip 32.
  • the cross section of the support boss 33 is trapezoidal.
  • the boss 33 has a circumferential surface 331 that abuts against the outer circumferential surface of the piston, and the supporting boss 33 is provided with an oil gap 332.

Abstract

一种液压破碎锤的中缸体密封结构，包括中缸体（1）和滑动设置在中缸体（1）内的活塞（2），中缸体（1）前端的内周面上开设有密封槽（11），密封槽（11）内设置有防尘密封圈（3），防尘密封圈（3）与活塞（2）的外周面相贴靠，中缸体（1）的内壁位于密封槽（11）的前侧具有呈环形的密封面（12），密封面（12）与活塞（2）的外周面之间具有间距（4），防尘密封圈（3）的前侧面上具有呈环形的密封凸台（31），密封凸台（31）的内周面与密封面（12）相贴靠。

Description

一种液压破碎锤的中缸体密封结构 技术领域
本实用新型属于破碎锤技术领域，涉及一种液压破碎锤，特别是一种液压破碎锤的中缸体密封结构。
背景技术
破碎锤通常安装在挖掘机、装载机或动力站上使用，它具有冲击力大、使用方便、机动性好和效率高等优点，主要用于建筑施工中的破碎、拆除、开挖硬层等工作。破碎锤一般包括前缸体、中缸体、后缸体、钎杆和活塞，钎杆设置在前缸体内，活塞设置在中缸体内，活塞沿中缸体的轴向往复移动并打击钎杆。
目前，中国专利网公开了一种破碎锤机芯密封结构【授权公告号：CN202251955U】，包括前缸体、中缸体、后缸体、活塞和钎杆，活塞安装在中缸体的内部，钎杆位于前缸体内部且位于活塞的正下方，中缸体前端内壁上依次开设有四道环形凹槽，四道环形凹槽内依次安装有防尘封、第一主油封、第二主油封和缓冲环。
上述防尘封、第一主油封、第二主油封和缓冲油封的密封唇部均与活塞的外周面是紧密接触的，为了保证防尘封、第一主油封、第二主油封和缓冲油封能够顺利装入到环形凹槽内，通常采用的设计是环形凹槽的尺寸大于各个密封件的尺寸，在上述专利的附图2中可看出，各个密封件的前侧壁与环形凹槽内的前侧壁贴合，各个密封件的后侧壁与环形凹槽内的后侧壁之间存在间隙。破碎锤在工作过程中，当活塞在中缸体内向后移动复位时，会使得防尘封、第一主油封、第二主油封和缓冲油封它们的整体向后发生轻微的形变，使得防尘封、第一主油封、第二主油封和缓冲油封的前侧壁均与各自环形凹槽的内侧壁之间形成缝隙，当活塞在中缸体内向前移动复位时，会使得防尘封、第一主油封、第二主油封和缓冲油封它们的整体向后发生轻微的形变，使得防尘封、第一主油封、第二主油封和缓冲油封的外周面均与各自环形凹槽的内底面之间形成缝隙，活塞在沿前后往复移动的过程中，前缸体内的灰尘通过密封件与密封槽侧壁之间的间隙进入到中缸体内，对中缸体内的液压油造成污染，导致液压油变黑，而液压油是用来驱动活塞的，液压油受污染后再作用在活塞上使得存在活塞受力不均的情况，造成活塞与缸体发生拉毛问题。
发明内容
本实用新型的目的是针对现有的技术存在上述问题，提出了一种液压破碎锤的中缸体密封结构，本实用新型所要解决的技术问题是：如何解决灰尘容易从中缸体的前端进入到 中缸体内的问题。
本实用新型的目的可通过下列技术方案来实现：
一种液压破碎锤的中缸体密封结构，液压破碎锤包括中缸体和滑动设置在中缸体内的活塞，本中缸体密封结构包括中缸体前端的内周面上开设有密封槽，所述密封槽内设置有防尘密封圈，所述防尘密封圈与活塞的外周面相贴靠，所述中缸体的内壁位于密封槽的前侧具有呈环形的密封面，该密封面与活塞的外周面之间具有间距，其特征在于，所述防尘密封圈的前侧面上具有呈环形的密封凸台，所述密封凸台的内周面与密封面相贴靠。
为了能够保证防尘密封圈能够与活塞的外周面紧密贴合，防尘密封圈的内径要小于活塞的外径；所以当防尘密封圈装配在密封槽内后，密封凸台的内周面与密封面相贴靠后，活塞穿设在防尘密封圈中，防尘密封圈发生一定程度的形变使得防尘密封圈与活塞的外周面紧密贴合，防尘密封圈发生形变后对密封凸台形成一定的挤压作用，使得密封凸台的内周面与密封面进一步紧贴，而当活塞在中缸体内往复运动的过程中，密封凸台的内周面与密封面始终保持紧贴状态，特别是活塞向前移动打击钎杆时，防尘密封圈整体向前发生形变，进而对密封凸台造成进一步挤压，使得密封凸台的内周面与密封面越发紧贴，避免灰尘通过防尘密封圈与密封槽内壁之间的间隙进入到中缸体内，降低中缸体内液压油被污染的风险。
在上述的一种液压破碎锤的中缸体密封结构中，所述防尘密封圈包括防尘唇，所述防尘唇的外端与活塞的外周面相贴靠，所述密封凸台的一端与防尘唇的根部相连接。通过本结构的设置，防尘唇的外端与活塞的外周面相贴靠后，防尘唇发生轻微的形变，防尘唇发生形变后对密封凸台造成一定程度的挤压，使得密封凸台的内周面与密封面紧贴，避免密封凸台的内周面与密封面之间出现间隙。
在上述的一种液压破碎锤的中缸体密封结构中，所述密封凸台沿径向的厚度从密封凸台的外端至根部方向逐渐增大。
在上述的一种液压破碎锤的中缸体密封结构中，所述密封凸台的外周面为圆锥面。
在上述的一种液压破碎锤的中缸体密封结构中，所述密封凸台与防尘唇之间的夹角为小于90°。
在上述的一种液压破碎锤的中缸体密封结构中，所述密封凸台与防尘唇之间的夹角为30°～40°。
在上述的一种液压破碎锤的中缸体密封结构中，所述防尘密封圈的内周面上具有呈环形的支撑凸台，所述支撑凸台具有与活塞的外周面相贴靠的圆周面。通过本结构的设置，支撑凸台的圆周面与活塞的外周面相贴靠的结构一方面形成一道密封，提高中缸体内壁与活 塞之间的密封效果，减少灰尘进入到中缸体内，另一方面，圆周面的设置提高了支撑凸台与活塞的接触面积，对活塞的前后移动起到导向支撑的作用，提高活塞前后移动的稳定性。
在上述的一种液压破碎锤的中缸体密封结构中，所述支撑凸台相对于防尘唇靠内设置。通过本结构的设置，支撑凸台主要起到对活塞进行支撑和导向的作用，支撑凸台相对于防尘唇靠内设置避免中缸体外的灰尘直接进入到圆周面与活塞的外周面之间。
在上述的一种液压破碎锤的中缸体密封结构中，所述支撑凸台的横截面为梯形。通过本结构的设置，支撑凸台的横截面为梯形的结构使得支撑凸台具有较好的结构强度，进一步提高对活塞的支撑效果。
在上述的一种液压破碎锤的中缸体密封结构中，所述支撑凸台上开设有过油缺口。当活塞发生空打时，活塞向前移动，中缸体内的液压油被挤压到防尘密封圈处，液压油不排出的话会将防尘密封圈挤出密封槽，进而导致活塞拉毛；通过本结构的设置，液压油通过过油缺口被挤到支撑凸台和防尘唇之间，由于防尘唇的外端部易于形变，液压油压力大很轻易通过防尘唇与活塞之间的间隙直接流出中缸体。
与现有技术相比，本实用新型的液压破碎锤的中缸体密封结构具有以下优点：当防尘密封圈装配在密封槽内后，密封凸台的内周面与密封面相贴靠后，活塞穿设在防尘密封圈中，防尘密封圈发生一定程度的形变使得防尘密封圈与活塞的外周面紧密贴合，防尘密封圈发生形变后对密封凸台形成一定的挤压作用，使得密封凸台的内周面与密封面进一步紧贴，而当活塞在中缸体内往复运动的过程中，密封凸台的内周面与密封面始终保持紧贴状态，特别是活塞向前移动打击钎杆时，防尘密封圈整体向前发生形变，进而对密封凸台造成进一步挤压，使得密封凸台的内周面与密封面越发紧贴，避免灰尘通过防尘密封圈与密封槽内壁之间的间隙进入到中缸体内，降低中缸体内液压油被污染的风险。
附图说明
图1是本实用新型的剖面结构示意图。
图2是图1中A部的放大结构示意图。
图3是图2中B部的放大结构示意图。
图4是本实用新型防尘密封圈的立体结构示意图。
图中，1、中缸体；11、密封槽；12、密封面；2、活塞；3、防尘密封圈；31、密封凸台；31a、圆锥面；32、防尘唇；33、支撑凸台；331、圆周面；332、过油缺口；4、间距。
具体实施方式
以下是本实用新型的具体实施例并结合附图，对本实用新型的技术方案作进一步的描述，但本实用新型并不限于这些实施例。
如图1、图2和图3所示，本液压破碎锤的中缸体密封结构，液压破碎锤包括中缸体1和滑动设置在中缸体1内的活塞2，本中缸体密封结构包括中缸体1前端的内周面上开设有密封槽11，密封槽11内设置有防尘密封圈3，防尘密封圈3包括防尘唇32，防尘唇32的外端与活塞2的外周面相贴靠，中缸体1的内壁位于密封槽11的前侧具有呈环形的密封面12，该密封面12与活塞2的外周面之间具有间距4，防尘密封圈3的前侧面上具有呈环形的密封凸台31，密封凸台31的一端与防尘唇32的根部相连接，密封凸台31的内周面与密封面12相贴靠。为了能够保证防尘密封圈3能够与活塞2的外周面紧密贴合，防尘密封圈3的内径要小于活塞2的外径；所以当防尘密封圈3装配在密封槽11内后，,密封凸台31的内周面与密封面12相贴靠后，活塞2穿设在防尘密封圈3中，防尘唇32发生一定程度的形变使得防尘唇32的外端与活塞2的外周面紧密贴合，防尘唇32发生形变后对密封凸台31形成一定的挤压作用，使得密封凸台31的内周面与密封面12进一步紧贴，而当活塞2在中缸体1内往复运动的过程中，密封凸台31的内周面与密封面12始终保持紧贴状态，特别是活塞2向前移动打击钎杆时，防尘密封圈3整体向前发生形变，进而对密封凸台31造成进一步挤压，使得密封凸台31的内周面与密封面12越发紧贴，避免灰尘通过防尘密封圈3与密封槽11内壁之间的间隙进入到中缸体1内，降低中缸体1内液压油被污染的风险。
进一步的，密封凸台31沿径向的厚度从密封凸台31的外端至根部方向逐渐增大，本实施例中，密封凸台31的外周面为圆锥面31a，活塞2向前移动打击钎杆时，防尘密封圈3整体向前发生形变，进而对密封凸台31造成进一步挤压，该结构有助于密封凸台31的内周面与密封面12进一步紧贴。密封凸台31与防尘唇32之间的夹角为小于90°，本实施例中，密封凸台31与防尘唇32之间的夹角为30°～40°，该结构使得防尘唇32发生形变后能够对密封凸台31造成挤压，进而使得密封凸台31的内周面与密封面12紧贴。
如图4所示，防尘密封圈3的内周面上具有呈环形的支撑凸台33，支撑凸台33相对于防尘唇32靠内设置，支撑凸台33的横截面为梯形，支撑凸台33具有与活塞的外周面相贴靠的圆周面331，支撑凸台33上开设有过油缺口332。
本文中所描述的具体实施例仅仅是对本实用新型精神作举例说明。本实用新型所属技术领域的技术人员可以对所描述的具体实施例做各种各样的修改或补充或采用类似的方式替代，但并不会偏离本实用新型的精神或者超越所附权利要求书所定义的范围。

Claims (10)

  1. 一种液压破碎锤的中缸体密封结构，液压破碎锤包括中缸体(1)和滑动设置在中缸体(1)内的活塞(2)，本中缸体密封结构包括中缸体(1)前端的内周面上开设有密封槽(11)，所述密封槽(11)内设置有防尘密封圈(3)，所述防尘密封圈(3)与活塞(2)的外周面相贴靠，所述中缸体(1)的内壁位于密封槽(11)的前侧具有呈环形的密封面(12)，该密封面(12)与活塞(2)的外周面之间具有间距(4)，其特征在于，所述防尘密封圈(3)的前侧面上具有呈环形的密封凸台(31)，所述密封凸台(31)的内周面与密封面(12)相贴靠。
  2. 根据权利要求1所述的一种液压破碎锤的中缸体密封结构，其特征在于，所述防尘密封圈(3)包括防尘唇(32)，所述防尘唇(32)的外端与活塞(2)的外周面相贴靠，所述密封凸台(31)的一端与防尘唇(32)的根部相连接。
  3. 根据权利要求1所述的一种液压破碎锤的中缸体密封结构，其特征在于，所述密封凸台(31)沿径向的厚度从密封凸台(31)的外端至根部方向逐渐增大。
  4. 根据权利要求3所述的一种液压破碎锤的中缸体密封结构，其特征在于，所述密封凸台(31)的外周面为圆锥面(31a)。
  5. 根据权利要求2或3或4所述的一种液压破碎锤的中缸体密封结构，其特征在于，所述密封凸台(31)与防尘唇(32)之间的夹角为小于90°。
  6. 根据权利要求5所述的一种液压破碎锤的中缸体密封结构，其特征在于，所述密封凸台(31)与防尘唇(32)之间的夹角为30°～40°。
  7. 根据权利要求2所述的一种液压破碎锤的中缸体密封结构，其特征在于，所述防尘密封圈(3)的内周面上具有呈环形的支撑凸台(33)，所述支撑凸台(33)具有与活塞的外周面相贴靠的圆周面(331)。
  8. 根据权利要求7所述的一种液压破碎锤的中缸体密封结构，其特征在于，所述支撑凸台(33)相对于防尘唇(32)靠内设置。
  9. 根据权利要求7所述的一种液压破碎锤的中缸体密封结构，其特征在于，所述支撑凸台(33)的横截面为梯形。
  10. 根据权利要求7所述的一种液压破碎锤的中缸体密封结构，其特征在于，所述支撑凸台(33)上开设有过油缺口(332)。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117066996A (zh) * 2023-10-12 2023-11-17 烟台百财机械设备有限公司 一种液压破碎锤前缸体内孔磨削定位装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN212690821U (zh) * 2020-06-17 2021-03-12 台州贝力特机械有限公司 一种液压破碎锤的中缸体密封结构

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201606495U (zh) * 2009-12-29 2010-10-13 深圳市富洋密封件有限公司 一种密气液压防尘密封圈结构
CN202215532U (zh) * 2011-08-31 2012-05-09 温岭市贝力特机械有限公司 一种液压破碎锤的缸体防尘结构
CN203857049U (zh) * 2014-05-23 2014-10-01 上海唯万密封科技有限公司 一种带回油槽的活塞杆密封及设有该活塞杆密封的破碎锤
KR20180043749A (ko) * 2016-10-20 2018-04-30 주식회사 에버다임 유압 브레이커의 씰링 구조
CN110566539A (zh) * 2019-09-17 2019-12-13 武汉市荣生密封技术有限公司 多级油缸活塞杆密封组件及液压装置
CN212690821U (zh) * 2020-06-17 2021-03-12 台州贝力特机械有限公司 一种液压破碎锤的中缸体密封结构

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201606495U (zh) * 2009-12-29 2010-10-13 深圳市富洋密封件有限公司 一种密气液压防尘密封圈结构
CN202215532U (zh) * 2011-08-31 2012-05-09 温岭市贝力特机械有限公司 一种液压破碎锤的缸体防尘结构
CN203857049U (zh) * 2014-05-23 2014-10-01 上海唯万密封科技有限公司 一种带回油槽的活塞杆密封及设有该活塞杆密封的破碎锤
KR20180043749A (ko) * 2016-10-20 2018-04-30 주식회사 에버다임 유압 브레이커의 씰링 구조
CN110566539A (zh) * 2019-09-17 2019-12-13 武汉市荣生密封技术有限公司 多级油缸活塞杆密封组件及液压装置
CN212690821U (zh) * 2020-06-17 2021-03-12 台州贝力特机械有限公司 一种液压破碎锤的中缸体密封结构

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117066996A (zh) * 2023-10-12 2023-11-17 烟台百财机械设备有限公司 一种液压破碎锤前缸体内孔磨削定位装置
CN117066996B (zh) * 2023-10-12 2023-12-15 烟台百财机械设备有限公司 一种液压破碎锤前缸体内孔磨削定位装置

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