CN110847612A - Pumping system and engineering machinery with same - Google Patents
Pumping system and engineering machinery with same Download PDFInfo
- Publication number
- CN110847612A CN110847612A CN201810949950.7A CN201810949950A CN110847612A CN 110847612 A CN110847612 A CN 110847612A CN 201810949950 A CN201810949950 A CN 201810949950A CN 110847612 A CN110847612 A CN 110847612A
- Authority
- CN
- China
- Prior art keywords
- pumping system
- rear wall
- valve cylinder
- cylinder seat
- fixing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/04—Devices for both conveying and distributing
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/04—Devices for both conveying and distributing
- E04G21/0418—Devices for both conveying and distributing with distribution hose
- E04G21/0436—Devices for both conveying and distributing with distribution hose on a mobile support, e.g. truck
Abstract
The invention provides a pumping system and an engineering machine with the same, wherein the pumping system comprises: the hopper rear wall plate is provided with a fixing hole and is made of a metal material; the first part of the fixing pin penetrates through the fixing hole; the swing valve mounting assembly comprises a swing valve cylinder seat, a positioning hole corresponding to the fixing pin is formed in the swing valve cylinder seat, the second part of the fixing pin penetrates through the positioning hole, and the swing valve cylinder seat is fixedly connected with the hopper rear wall plate. The technical scheme of the invention effectively solves the problem of higher production cost of the fixing structure of the key and the key slot in the prior art.
Description
Technical Field
The invention relates to the field of engineering machinery, in particular to a pumping system and engineering machinery with the same.
Background
The pump truck is a common engineering machine for concrete operation, wherein a pumping system is a core component of the pump truck. The pumping system of the pump truck on the market at present mills a key that outwards protrudes on pendulum valve hydro-cylinder seat usually, mills a keyway with key looks adaptation on the wallboard behind the hopper on the position that corresponds, carries out preliminary positioning to pendulum valve hydro-cylinder seat through the cooperation of key and keyway, welds the connection between realization pendulum valve hydro-cylinder seat and the wallboard behind the hopper on the wallboard behind the hopper again and fixes.
On the one hand, because processing has the welding position difference, has certain clearance between the key of pendulum valve hydro-cylinder seat and the keyway of hopper rear wall board, has certain skew when key and keyway cooperation between the actual position of pendulum valve mount pad and the preset position, leads to welding position inaccurate. On the other hand, due to the existence of the gap, when the pumping system operates, all the impact on the swing valve cylinder seat is transmitted to the welding lines, and the welding between the swing valve cylinder seat and the rear wall plate of the hopper is easily caused. In addition, the key and keyway are relatively expensive to produce.
Disclosure of Invention
The invention aims to provide a pumping system and engineering machinery with the same, and aims to solve the problem that in the prior art, a fixed structure of a key and a key slot is high in production cost.
To achieve the above object, according to one aspect of the present invention, there is provided a pumping system comprising: the hopper rear wall plate is provided with a fixing hole and is made of a metal material; the first part of the fixing pin penetrates through the fixing hole; the swing valve mounting assembly comprises a swing valve oil cylinder seat, a positioning hole corresponding to the fixing pin is formed in the swing valve oil cylinder seat, the second part of the fixing pin penetrates through the positioning hole, and the swing valve oil cylinder seat is fixedly connected with the hopper rear wall plate.
Further, fixed pin and fixed orifices interference fit, fixed pin and locating hole interference fit.
Further, the fixing hole is a blind hole or a through hole.
Further, pendulum valve installation component is still including hanging, hang the setting in the below of pendulum valve cylinder seat and with hopper back wallboard fixed connection, hang and be provided with first slot, be provided with the second slot on the position that wallboard and first slot correspond behind the hopper, first slot can be pegged graft with the second slot and cooperate.
Furthermore, the swing valve installation assembly further comprises a swing valve oil cylinder seat plate, and the swing valve oil cylinder seat plate is arranged between the swing valve oil cylinder seat and the hanger and fixedly connected with the rear wall plate of the hopper.
Further, a shaft hole is formed in the swing valve cylinder seat, and the axis of the shaft hole is arranged at an angle with the horizontal line.
Furthermore, the swing valve cylinder seat is connected with the rear wall plate of the hopper in a welding mode, the number of the swing valve mounting assemblies is two, and the two sets of the swing valve mounting assemblies are symmetrically arranged on the rear wall plate of the hopper.
Furthermore, the fixed pin is a plurality of, and a plurality of fixed pin interval sets up, and the locating hole is a plurality of, and a plurality of locating holes set up with a plurality of fixed pins one-to-one.
Further, the fixed pin is including setting up the first section of thick bamboo section in the fixed orifices and setting up the second section of thick bamboo section in the locating hole, is provided with a plurality of first logical grooves on the first section of thick bamboo, and first logical groove runs through the interior outer wall of first section of thick bamboo section to extend to the tip along the axial of first section of thick bamboo, be provided with a plurality of second through-grooves on the second section of thick bamboo, the second through-groove runs through the interior outer wall of second section of thick bamboo section, and extends to the tip along the axial of second section of thick bamboo.
According to another aspect of the invention, a working machine is provided, which comprises a pumping system, wherein the pumping system is the pumping system.
By applying the technical scheme of the invention, the fixing hole is formed in the rear wall plate of the hopper, the positioning hole is formed in the swing valve cylinder seat, and the fixing pin penetrates through the fixing hole and the positioning hole to realize the connection and fixation between the swing valve cylinder seat and the rear wall plate of the hopper. The fixed pin is easy to produce, the fixed hole and the positioning hole are easy to process, the production cost of the connecting structure between the swing valve cylinder seat and the hopper rear wall plate is greatly reduced by the structure, the assembly process is simplified, and the production efficiency is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 shows a schematic front view of a first embodiment of a pumping system according to the present invention;
FIG. 2 shows a partially exploded schematic view of the pumping system of FIG. 1;
FIG. 3 shows a schematic cross-sectional A-A view of the pumping system of FIG. 1;
FIG. 4 shows a schematic structural view of a retainer pin of the pumping system of FIG. 1;
FIG. 5 shows a schematic structural view of a hanger of the pumping system of FIG. 1;
FIG. 6 shows a partial structural schematic view of a rear wall panel of the hopper of the pumping system of FIG. 1;
FIG. 7 shows a schematic cross-sectional structural view of embodiment two of the pumping system according to the present invention;
FIG. 8 shows a schematic of the retainer pin of the pumping system of FIG. 7; and
fig. 9 shows a schematic cross-sectional structural view of a third embodiment of a pumping system according to the present invention.
Wherein the figures include the following reference numerals:
1. a pendulum valve cylinder base; 11. positioning holes; 5. a hopper rear wall panel; 51. a fixing hole; 52. a second trench; 8. a fixing pin; 81. a first barrel section; 82. a second barrel section; 83. a first through groove; 84. a second through groove; 85. a partition portion; 9. hanging; 91. a first trench; 10. the pendulum valve hydro-cylinder bedplate.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. 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 application.
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.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
The first embodiment is as follows:
as shown in fig. 1 and 2, the pumping system of the first embodiment includes a hopper having a hopper rear wall panel 5, the hopper rear wall panel 5 being made of a metal material, a swing valve including a swing arm and a piston, and a swing valve mounting assembly provided on the hopper for fixedly mounting the swing valve. Specifically, the pendulum valve installation component comprises a pendulum valve cylinder seat 1, the pendulum valve cylinder seat 1 is fixedly connected to a hopper rear wall plate 5 through a fixing pin 8, and a piston is connected between the pendulum valve cylinder seat 1 and a rocker arm. Specifically, a fixing hole 51 is formed in the hopper back wall plate 5, a first portion of the fixing pin 8 penetrates through the fixing hole 51, a positioning hole 11 corresponding to the fixing pin 8 is formed in the swing valve cylinder base 1, a second portion of the fixing pin 8 penetrates through the positioning hole 11, and the swing valve cylinder base 1 and the hopper back wall plate 5 can be fixed through welding.
By using the technical scheme of the embodiment, the fixing hole 51 is formed in the rear wall plate 5 of the hopper, the positioning hole 11 is formed in the swing valve cylinder base 1, and the fixing pin 8 is inserted into the fixing hole 51 and the positioning hole 11 to realize the connection and fixation between the swing valve cylinder base 1 and the rear wall plate 5 of the hopper. The fixing pin 8 is easy to produce, the fixing hole 51 and the positioning hole 11 are easy to process, the production cost of the connecting structure between the swing valve cylinder seat 1 and the hopper rear wall plate 5 is greatly reduced by the structure, the assembly process is simplified, and the production efficiency is improved.
In other embodiments not shown in the figures, the pre-connected hanging and hopper back wall plates can also be fixedly connected in other ways.
Preferably, the fixing pin 8 and the fixing hole 51 of the present embodiment are in interference fit, and the fixing pin 8 and the positioning hole 11 are in interference fit. Above-mentioned structure makes behind fixed pin 8 and the hopper between wallboard 5, all can not influenced by machining tolerance between fixed pin 8 and the pendulum valve cylinder seat 1, also can not appear the skew condition of predetermineeing the mounted position on wallboard 5 behind the hopper of the actual mounted position of pendulum valve cylinder seat 1 yet, accuracy when having improved the installation of pendulum valve cylinder seat 1.
Further, as shown in fig. 2, the pendulum valve cylinder block 1 of the present embodiment is provided with two positioning holes 11 in the vertical direction, and the two positioning holes 11 are arranged at intervals, and accordingly, the pumping system of the present embodiment also has two fixing pins 8, and correspondingly, two fixing holes 51 are arranged, and the two positioning holes 11 and the two fixing holes 51 are arranged in one-to-one correspondence with the two fixing pins 8. The above structure effectively restricts the swing valve cylinder block 1 from rotating on the surface of the hopper rear wall plate 5.
As shown in fig. 3, the fixing hole 51 of the present embodiment is a blind hole to keep the inner surface of the hopper intact.
Specifically, as shown in fig. 4, the fixing pin 8 of the present embodiment includes a first barrel section 81 disposed in the fixing hole 51 and a second barrel section 82 disposed in the positioning hole 11, the first barrel section 81 is provided with a plurality of first through grooves 83, the first through grooves 83 penetrate through inner and outer walls of the first barrel section 81 and extend toward the end portion in the axial direction of the first barrel section 81, the second barrel section 82 is provided with a plurality of second through grooves 84, and the second through grooves 84 penetrate through inner and outer walls of the second barrel section 82 and extend toward the end portion in the axial direction of the second barrel section 82. First through slots 83 divide first barrel section 81 into a plurality of spaced lobes enabling the ends of each lobe to approach radially toward the axis. When the first cylindrical section 81 extends into the fixing hole 51 with a relatively small size, the first cylindrical section 81 is elastically deformed and generates an elastic force outward in the radial direction, so that the fixing pin 8 is fixed in the fixing hole 51 and the machining tolerance is compensated. Similarly, the second cylinder section 82 fixes the fixing pin 8 in the positioning hole 11 based on the above principle and compensates for the machining tolerance, so that the swing valve cylinder seat 1 is indirectly fixed on the hopper rear wall plate 5, the influence of the machining tolerance is effectively avoided, and the possibility of weld line fracture is further reduced.
Meanwhile, the first through groove 83 of the first cylinder section 81 and the second through groove 84 of the second cylinder section 82 act respectively and do not influence each other, and the fixing effect is further improved.
When the pumping system operates, because the position of the swing valve cylinder seat 1 is accurate, the impact born by the welding line is small, and the elasticity of the fixing pin 8 can share part of the impact, thereby further reducing the possibility of welding line fracture.
As shown in fig. 4, the joint of the first cylindrical section 81 and the second cylindrical section 82 of the fixing pin 8 of the embodiment protrudes outward in the radial direction to form a partition 85, and when the fixing pin 8 is inserted into the fixing hole 51, the partition 85 can abut against the hopper back wall plate 5 to limit the depth of the fixing pin 8 extending into the fixing hole 51. The corresponding holding tank that is provided with of pendulum valve cylinder seat 1 is in order to hold partition 85, makes pendulum valve cylinder seat 1 and hopper back wall board 5 laminating.
As shown in fig. 5 and 6, the pumping system of the present embodiment further includes a hanger 9, and the hanger 9 is disposed below the swing valve cylinder base 1 and is fixedly connected to the hopper rear wall plate 5. Wherein, hang and be provided with first slot 91 on 9, be provided with second slot 52 on the position that hopper rear wall panel 5 corresponds with first slot 91. In this embodiment, the first groove 91 is disposed upward, and the width of the first groove 91 is adapted to the thickness of the hopper rear wall plate 5; the second groove 52 is arranged downwards, and the width of the second groove 52 is matched with the thickness of the hanging 9. The depth of first slot 91 is equivalent to the depth of second slot 52 to make first slot 91 can just with second slot 52 grafting cooperation, realize hanging 9 and hopper rear wall panel 5's preliminary fixed. Can improve the accuracy of hanging 9 and hopper rear wall panel 5 when the welding like this to optimize the atress of hanging between 9 and the hopper rear wall panel 5, reduce the cracked possibility of welding seam between 9 and the hopper rear wall panel 5 of hanging.
As shown in fig. 1 to 3, the swing valve mounting assembly of the present embodiment further includes a swing valve cylinder seat plate 10, and the swing valve cylinder seat plate 10 is disposed between the swing valve cylinder seat 1 and the hanger 9, and is fixedly connected to the hopper rear wall plate 5.
As shown in fig. 1, the pendulum valve cylinder base 1 of the present embodiment is provided with a shaft hole, the shaft hole is used for fixing one end of the pendulum valve cylinder, and the axis of the shaft hole is arranged at an angle to the horizontal line, so that the axis of the shaft hole is closer to the swing range of the pendulum valve cylinder, which is beneficial to increasing the thrust of the pendulum valve cylinder base, thereby improving the starting torque.
As shown in fig. 1, the swing valve mounting assemblies of the present embodiment are two sets, and the two sets of swing valve mounting assemblies are symmetrically arranged on the hopper back wall plate 5, that is, the structures of the swing valve cylinder seat 1, the fixing pin 8, the hanger 9, and the swing valve cylinder seat plate 10 are symmetrically arranged on the hopper back wall plate 5.
Example two:
the pumping system of the second embodiment changes the structure of the fixing pin and the structure of the fixing hole on the basis of the first embodiment. As shown in fig. 7, the fixing hole 51 of the present embodiment is a through hole, and as shown in fig. 8, a joint of the first cylindrical section 81 and the second cylindrical section 82 of the fixing pin 8 is recessed inward in the radial direction to form a partition 85. The partition 85 formed by the recess is advantageous for fixing the fixing pin 8 by a machine tool when the fixing pin 8 is machined.
Example three:
the pumping system of the third embodiment replaces the elastic fixing pin of the first and second embodiments with a screw as the fixing pin based on the second embodiment. As shown in fig. 9, the screw rod of the screw penetrates out of the fixing hole 51 from the inner side of the hopper, the head of the screw abuts against the inner wall of the hopper rear wall plate 5, the end part of the screw rod is fixedly connected with the swing valve cylinder seat 1 in a threaded manner, fastening is realized, the effect of reducing cost can be achieved, and the assembling accuracy is improved to a certain extent.
The application further provides a construction machine, and the construction machine (not shown in the figures) according to the embodiment comprises a pumping system, and the pumping system is a pumping system comprising all or part of the technical structures of the above embodiments. The engineering machinery of the embodiment has the advantages of low cost and stable installation of the swing valve.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
the hopper rear wall plate is provided with a fixing hole, the swing valve cylinder seat is provided with a positioning hole, and a fixing pin is arranged in the fixing hole and the positioning hole in a penetrating manner to realize the connection and fixation between the swing valve cylinder seat and the hopper rear wall plate. The fixed pin is easy to produce, the fixed hole and the positioning hole are easy to process, the production cost of the connecting structure between the swing valve cylinder seat and the hopper rear wall plate is greatly reduced by the structure, the assembly process is simplified, and the production efficiency is improved.
In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
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 oriented (rotated 80 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A pumping system, comprising:
the hopper rear wall plate (5), a fixing hole (51) is formed in the hopper rear wall plate (5), and the hopper rear wall plate (5) is made of a metal material;
a fixing pin (8), a first portion of the fixing pin (8) passing through the fixing hole (51);
the swing valve mounting assembly comprises a swing valve cylinder seat (1), a positioning hole (11) corresponding to the fixing pin (8) is formed in the swing valve cylinder seat (1), the second part of the fixing pin (8) is arranged in the positioning hole (11) in a penetrating mode, and the swing valve cylinder seat (1) is fixedly connected with the hopper rear wall plate (5).
2. Pumping system according to claim 1, characterized in that the fixing pin (8) and the fixing hole (51) are in interference fit, the fixing pin (8) and the positioning hole (11) being in interference fit.
3. Pumping system according to claim 2, characterized in that said fixing hole (51) is a blind hole or a through hole.
4. The pumping system of claim 1, wherein the pendulum valve mounting assembly further comprises a hanger (9), the hanger (9) is arranged below the pendulum valve cylinder base (1) and fixedly connected with the hopper rear wall plate (5), a first groove (91) is formed in the hanger (9), a second groove (52) is formed in a position, corresponding to the first groove (91), of the hopper rear wall plate (5), and the first groove (91) can be in plug fit with the second groove (52).
5. The pumping system of claim 4, wherein the pendulum valve mounting assembly further comprises a pendulum valve cylinder seat plate (10), the pendulum valve cylinder seat plate (10) being disposed between the pendulum valve cylinder seat (1) and the hanger (9) and being fixedly connected with the hopper back wall plate (5).
6. A pumping system according to claim 4, characterized in that the pendulum valve cylinder block (1) has an axial bore provided therein, the axis of which is arranged at an angle to the horizontal.
7. Pumping system according to any one of claims 1 to 6, characterized in that between said swing valve cylinder seat (1) and said hopper rear wall panel (5) there are welded connections, and there are two groups of said swing valve mounting assemblies, symmetrically arranged on said hopper rear wall panel (5).
8. The pumping system according to claim 1, wherein the fixing pin (8) is plural, the fixing pins (8) are provided in plural at intervals, the positioning hole (11) is plural, and the positioning holes (11) are provided in one-to-one correspondence with the fixing pins (8).
9. The pumping system according to claim 1, wherein the fixing pin (8) comprises a first barrel section (81) disposed in the fixing hole (51) and a second barrel section (82) disposed in the positioning hole (11), the first barrel section (81) is provided with a plurality of first through grooves (83), the first through grooves (83) penetrate through inner and outer walls of the first barrel section (81) and extend along an axial direction end portion of the first barrel section (81), the second barrel section (82) is provided with a plurality of second through grooves (84), and the second through grooves (84) penetrate through inner and outer walls of the second barrel section (82) and extend along an axial direction end portion of the second barrel section (82).
10. A working machine comprising a pumping system, characterized in that the pumping system is a pumping system according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810949950.7A CN110847612A (en) | 2018-08-20 | 2018-08-20 | Pumping system and engineering machinery with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810949950.7A CN110847612A (en) | 2018-08-20 | 2018-08-20 | Pumping system and engineering machinery with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110847612A true CN110847612A (en) | 2020-02-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810949950.7A Pending CN110847612A (en) | 2018-08-20 | 2018-08-20 | Pumping system and engineering machinery with same |
Country Status (1)
| Country | Link |
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| CN (1) | CN110847612A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113172568A (en) * | 2021-04-15 | 2021-07-27 | 中联重科股份有限公司 | Hopper positioning apparatus and method and hopper assembling method |
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| DE3306221A1 (en) * | 1983-02-23 | 1984-08-23 | Artur Dr.H.C. 7244 Waldachtal Fischer | Tubular connecting element for the connection of game components |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113172568A (en) * | 2021-04-15 | 2021-07-27 | 中联重科股份有限公司 | Hopper positioning apparatus and method and hopper assembling method |
| CN113172568B (en) * | 2021-04-15 | 2022-06-24 | 中联重科股份有限公司 | Hopper positioning apparatus and method and hopper assembling method |
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