Washing machine counterweight structure and roller washing machine

Abstract

The invention discloses a washing machine counterweight structure and a roller washing machine, and the counterweight structure comprises a counterweight block body which is formed by pouring concrete; the balancing weight body is provided with a mounting hole which is formed in a front-back penetrating mode. And a metal sleeve is arranged in the mounting hole and is used for inserting and assembling the counterweight structure and a mounting column arranged on the outer barrel of the washing machine. By means of the arrangement, the metal sleeve is additionally arranged at the joint of the balancing weight body and the outer barrel, the metal sleeve is used for protecting the assembly position of the balancing weight body and the outer barrel, and vibration of the outer barrel is effectively prevented from being transmitted to the balancing weight body made of concrete when the washing machine runs; the situation that chippings break away from the mounting hole of the balancing weight body supported by concrete is avoided, and then the technical progress that the abrasion resistance of the washing machine balancing weight structure is remarkably improved is achieved on the basis that cost is not increased. Meanwhile, the device is simple in structure, remarkable in effect and suitable for application and popularization.

Description

Technical Field

[0001] The invention relates to the field of drum washing machines, and in particular to a counterweight structure of a drum washing machine, and also to an assembly method of the counterweight structure and the washing machine. Background Art

[0002] Washing machines are essential household appliances in people's daily lives. As people's living standards improve, washing machines are also changing in the direction of people's needs. Washing machines are becoming more and more intelligent, thinner and more and more functional, but the inevitable noise problem of washing machines during operation is always a problem that the industry is working hard to solve.

[0003] At present, the low-priced washing machines on the market have poor vibration and noise control during operation. Such washing machines increase the counterweight structure to reduce the vibration and noise during operation. The counterweight body of the existing drum washing machine is generally cast with cement, concrete, etc. Although the counterweight body made of concrete casting has the advantages of low cost and high weight, after the concrete counterweight body is assembled with the plastic outer cylinder of the washing machine, during the long-term use of the washing machine, the outer cylinder will vibrate, resulting in the friction between the matching hole wall of the concrete counterweight body and the mounting column of the plastic outer cylinder. Moreover, after continuous wear, the matching hole size of the concrete counterweight body will become larger, and a large gap will appear at the plug-in assembly of the mounting column of the outer cylinder and the counterweight body, which will increase the vibration amplitude of the counterweight body when the washing machine is running, increase the wear of the counterweight body assembly, and make the running noise of the washing machine larger.

[0004] In order to solve the above problem, some existing counterweight structures of washing machines use a metal shell on the outside of the counterweight body, so that the concrete counterweight body is protected by the metal shell and will not be worn during the operation of the washing machine; however, the added metal shell will greatly increase the cost of the washing machine.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a washing machine counterweight structure to achieve the purpose of preventing excessive wear at the assembly point between the counterweight block body and the outer drum of the washing machine; another object of the present invention is to provide a drum washing machine to achieve the technical effect of achieving good wear resistance at the counterweight assembly point on the basis of low cost.

[0007] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0008] A washing machine counterweight structure comprises: a counterweight body made of concrete; a mounting hole extending through the counterweight body; a metal sleeve installed in the mounting hole for plugging and assembling the counterweight structure with a mounting column provided on the outer drum of the washing machine.

[0009] Furthermore, the metal sleeve is embedded and fixed on the inner wall of the mounting hole of the counterweight body; preferably, the metal sleeve and the mounting hole are coaxial and equidiametrically arranged, and the outer wall of the metal sleeve and the inner wall of the mounting hole are in close contact with each other.

[0010] Furthermore, both ends of the metal sleeve are provided with a circle of flange rings bent radially outward, and the two circles of flange rings are respectively in relative contact with the front and rear side walls of the outer periphery of the mounting hole of the counterweight body, so as to fix the metal sleeve and the counterweight body in the front and rear directions.

[0011] Furthermore, horizontal grooves recessed into the interior of the counterweight body are respectively provided on the front and rear side walls, and the horizontal grooves on the front and rear sides are coaxially arranged, and the centers of the groove bottoms of the horizontal grooves on both sides are connected through mounting holes horizontally arranged through the axis and extending front and back; preferably, the radial dimension of the front horizontal groove is smaller than the radial dimension of the rear horizontal groove; further preferably, the horizontal grooves on the front and rear sides are both open grooves whose radial dimensions decrease from the groove mouth toward the groove bottom.

[0012] Furthermore, a plurality of mounting holes are provided on the counterweight body, and a metal sleeve is embedded in each mounting hole in a one-to-one correspondence.

[0013] Furthermore, the counterweight block body is cast by pouring concrete slurry into a casting mold; before pouring the concrete of the counterweight block body, a metal sleeve is pre-installed on the casting mold so that the metal sleeve constitutes a part of the casting mold, so that the metal sleeve can be directly embedded in the cast concrete counterweight block body during the subsequent concrete pouring.

[0014] The present invention also introduces a drum washing machine, comprising an outer drum, a flange on the outer drum mouth of which is provided with a mounting column protruding horizontally on the front side; and also includes any of the above-mentioned washing machine counterweight structures, wherein the mounting column is inserted from back to front into a metal sleeve embedded in a mounting hole provided on the counterweight block body, so as to assemble the counterweight block body on the outer drum.

[0015] Furthermore, a mounting column protruding horizontally toward the front side is provided on the front side of the flange of the outer tube mouth, and the outer circumferential radial dimension of the mounting column is set to be equal to the inner circumferential radial dimension of the metal sleeve.

[0016] Furthermore, a bolt hole opening forward is coaxially arranged on the mounting column, and at least part of the inner wall of the bolt hole is provided with an internal thread mating with the mounting bolt, and the mounting bolt is coaxially tightened on the bolt hole of the mounting column from front to rear; the outer diameter of the nut of the mounting bolt is larger than the inner radial dimension of the metal sleeve, so that the counterweight body is clamped and fixed by the mounting bolt in the horizontal front and rear directions; preferably, a gasket is passed through the mounting bolt, and the outer radial dimension of the gasket is larger than the outer radial dimension of the metal sleeve, and the gasket is clamped between the nut and the counterweight body.

[0017] Furthermore, a metal plate is fixedly mounted on the mounting column, a through hole coaxially provided with the bolt hole is provided on the metal plate, an internal thread is provided on the inner peripheral wall of the through hole, and the external thread of the mounting bolt is meshed and fixed with the internal thread of the through hole provided on the metal plate; preferably, a mounting groove open downward is provided on the mounting column, the metal plate is inserted into the mounting groove from bottom to top, and the through hole provided in the center of the metal plate is coaxially relatively connected with the bolt hole provided on the mounting column.

[0018] Furthermore, an outer cylinder mouth flange is provided with an outer cylinder mouth that passes through from front to back, and three mounting columns are arranged at intervals along the circumference of the mouth at the lower side of the outer cylinder mouth. The three mounting columns are respectively inserted one by one into metal sleeves embedded in different mounting holes on the same counterweight block body.

[0019] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art.

[0020] Through the above arrangement, a metal sleeve is installed at the connection between the counterweight body and the outer drum, and the metal sleeve is used to protect the assembly of the two, which effectively prevents the vibration of the outer drum from being transmitted to the counterweight body made of concrete when the washing machine is running, and prevents the generation of debris from detaching from the mounting hole of the counterweight body supported by concrete, thereby achieving a technical progress of significantly improving the wear resistance of the counterweight structure of the washing machine without increasing the cost.

[0021] At the same time, the invention has a simple structure, significant effects and is suitable for popularization and use.

[0022] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings:

[0024] Figure 1Schematic diagram of the assembly structure of the counterweight structure and the outer drum of the washing machine in an embodiment of the present invention;

[0025] Figure 2 It is an exploded schematic diagram of the assembly of the counterweight structure and the outer drum of the washing machine in an embodiment of the present invention;

[0026] Figure 3 1 is a front view schematic diagram of the assembly of the counterweight structure and the outer drum of the washing machine in an embodiment of the present invention;

[0027] Figure 4 In the embodiment of the present invention Figure 3 Schematic diagram of the structure of the AA section;

[0028] Figure 5 In the embodiment of the present invention Figure 4 The structural diagram is enlarged at the dotted line.

[0029] Description of main components: 1. Counterweight body; 101. Mounting hole; 102. Front horizontal groove; 103. Rear horizontal groove; 104. Metal sleeve; 1040. Sleeve body; 1041. Front flange ring; 1042. Rear flange ring; 2. Outer tube mouth flange; 201. Mounting column; 202. Bolt hole; 203. Metal plate; 2031. Through hole; 204. Mounting groove; 205. Internal thread; 206. Columnar boss; 3. Mounting bolt; 301. Nut; 302. Screw; 303. External thread; 4. Gasket.

[0030] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0032] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] like Figures 1 to 5 As shown, an embodiment of the present invention introduces a drum washing machine, which includes: an outer drum of the drum washing machine and a counterweight body 1, the counterweight body 1 is assembled on the outer drum mouth flange 2 on the front side of the outer drum of the drum washing machine, and / or the outer drum bottom on the rear side of the outer drum, so as to use the added counterweight body 1 to level the outer drum of the washing machine with a horizontal axis or an upward tilted drum mouth side, so that the center of gravity of the integral part formed by the outer drum and the counterweight body 1 is close to or directly located at the rotation center of the outer drum, thereby reducing the vibration of the outer drum during the operation of the washing machine and reducing the operating noise of the washing machine.

[0035] In an embodiment of the present invention, the counterweight structure of a drum washing machine includes a counterweight body 1; the counterweight body 1 is made of concrete; a mounting hole 101 is provided on the counterweight body 1 and is penetrated from front to back; a metal sleeve 104 is installed in the mounting hole 101, and when the counterweight body 1 is assembled with the outer drum of the washing machine, the metal sleeve 104 is used to be plugged and assembled with the mounting column 201 provided on the outer drum of the washing machine, so that the connection between the counterweight body 1 and the outer drum is connected by the metal sleeve 104, and the metal sleeve 104 is used to protect the assembly point of the two, which effectively prevents the vibration of the outer drum from being transmitted to the counterweight body 1 made of concrete when the washing machine is running, thereby achieving a technical progress of significantly improving the wear resistance of the counterweight structure of the washing machine without increasing the cost.

[0036] In an embodiment of the present invention, the metal sleeve 104 is embedded and fixed on the inner wall of the mounting hole 101 of the counterweight body 1, so that the metal sleeve 104 is fixedly connected to the counterweight body, and the metal sleeve 104 is fixedly assembled on the counterweight body 1; preferably, the metal sleeve 104 and the mounting hole 101 are coaxial and equidiametrically arranged, and the outer wall of the metal sleeve 104 and the inner wall of the mounting hole 101 are in close contact with each other to ensure the stability of the assembly between the metal sleeve and the counterweight body, so that the two will not shake in the radial direction after being assembled.

[0037] In the embodiment of the present invention, the metal sleeve 104 includes a sleeve body 1040 with a horizontally arranged axis and in a straight cylindrical shape. Both ends of the sleeve body 1040 are respectively provided with a circle of flange rings that are radially bent outward and horizontally arranged, which are respectively a front flange ring 1041 located on the front side of the counterweight body 1 and a rear flange ring 1042 located on the rear side of the counterweight body 1; the front flange ring 1041 is in close contact with the front side wall of the counterweight body 1 outside the mounting hole 101, and the rear flange ring 1042 is in close contact with the rear side wall of the counterweight body 1 outside the mounting hole 101, so that the metal sleeve 104 is clamped with the counterweight body 1 in the axial front and rear directions, respectively, and then the metal sleeve 104 and the counterweight body 1 are fixed in the front and rear directions, so that the metal sleeve 104 will not be separated from the counterweight body 1 in the front and rear horizontal directions.

[0038] In the embodiment of the present invention, the front and rear side walls of the counterweight body 1 are respectively provided with horizontal grooves recessed into the interior of the counterweight body 1, which are respectively the front horizontal groove 102 and the rear horizontal groove 103; the front horizontal groove 102 and the rear horizontal groove 103 are coaxially arranged cylindrical grooves, and the groove bottom center of the front horizontal groove 102 and the groove bottom center of the rear horizontal groove 103 are connected to the mounting hole 101 which is horizontally arranged and extends forward and backward through the axis; the two ends of the metal sleeve 104 arranged in the mounting hole 101 are respectively connected to the groove of the front horizontal groove 102 The bottom of the front and rear horizontal grooves 103 are flush; the front flange ring 1041 provided at the front end of the metal sleeve 104 is in corresponding fit contact with the bottom of the front horizontal groove 102, and the rear flange ring 1042 provided at the rear end of the metal sleeve 104 is in corresponding fit contact with the bottom of the rear horizontal groove 103; preferably, the outer radial dimension of the front flange ring 1041 is set to be equal to the radial dimension of the bottom of the front horizontal groove 102, and the outer radial dimension of the rear flange ring 1042 is set to be equal to the radial dimension of the bottom of the rear horizontal groove 103.

[0039] In the embodiment of the present invention, in order to improve the structural strength of the mounting hole 101 of the counterweight body 1, the radial dimension of the front horizontal groove 102 and the radial dimension of the rear horizontal groove 103 can be set to be unequal, so as to improve the structural strength of the penetration part of the counterweight body 1 by using the parts with changed radial dimensions; preferably, in order to improve the assembly convenience of the counterweight body, the radial dimension of the front horizontal groove is smaller than the radial dimension of the rear horizontal groove, so that the mounting column 201 provided on the outer cylinder can be inserted from the back to the front into the corresponding mounting hole 101 with a larger radial dimension on the rear side. At the same time, the radial dimension of the mounting hole 101 needs to be smaller than the radial dimension of the groove bottom of the front horizontal groove 102, and smaller than the radial dimension of the groove bottom of the rear horizontal groove 103.

[0040] Further preferably, in order to facilitate the insertion of the rear mounting column from back to front and the insertion and engagement of the mounting bolts from front to back, the front horizontal groove 102 and the rear horizontal groove 103 are both set as open grooves with radial dimensions decreasing from the groove mouth to the groove bottom, and then the tapered side walls are used to guide the insertion of the corresponding mounting columns and mounting bolts.

[0041] In an embodiment of the present invention, one or more mounting holes 101 may be provided on the counterweight body 1, so that the counterweight body can be plugged and fixed relative to the mounting posts 201 on the outer drum of the washing machine using the multiple mounting holes 101, respectively, so that the counterweight body 1 can be stably assembled on the outer drum of the washing machine; preferably, the counterweight body 1 is provided with multiple mounting holes 101, and metal sleeves 104 are respectively and correspondingly embedded in each mounting hole 101, so that metal sleeves 104 composed of different independent parts can be respectively embedded in each mounting hole 101, thereby ensuring that the metal sleeves 104 in each mounting hole 101 can be independently and replaceably installed on the counterweight body 1.

[0042] In an embodiment of the present invention, the counterweight body 1 is cast by pouring concrete slurry into a casting mold; before pouring concrete for the counterweight body 1, a metal sleeve 104 is pre-installed on the casting mold, so that the metal sleeve 104 constitutes a part of the casting mold, so that when the subsequent concrete pouring is completed and the mold is demolded, the metal sleeve 104 can be directly embedded in the cast concrete counterweight body 1, so that the metal sleeve 104 is directly embedded in the counterweight body 1 during the casting process, thereby avoiding the need to set up a metal sleeve 104 assembly step during the preparation of the counterweight structure, and reducing the complexity of the counterweight structure preparation process.

[0043] like Figures 1 to 5 As shown, the embodiment of the present invention also introduces a drum washing machine, including an outer drum, and a mounting column 201 protruding horizontally from the front side is provided on the outer drum flange 2; the drum washing machine also includes any of the above-mentioned washing machine counterweight structures, and the mounting column 201 is correspondingly inserted from back to front into the metal sleeve 104 embedded in the mounting hole 101 provided on the counterweight body 1, so as to assemble the counterweight body 1 on the outer drum. Of course, in the embodiment of the present invention, the discussion is carried out by taking the way of installing the counterweight body 1 on the outer drum flange 2 as an example, but in the present invention, the counterweight body 1 can also be installed on other parts of the outer drum, such as: the bottom of the outer drum, the wall of the outer drum and other positions, and the above scheme also falls within the protection scope of this application.

[0044] In the embodiment of the present invention, the method of installing the counterweight body 1 on the outer cylinder flange 2 is taken as an example to be discussed, as follows:

[0045] A mounting column 201 protruding horizontally toward the front is provided on the front side of the outer tube mouth flange 2. The outer circumferential radial dimension of the mounting column 201 is set to be equal to the inner circumferential radial dimension of the metal sleeve 104, so that the mounting column 201 inserted into the metal sleeve 104 is in close contact in any radial direction, effectively avoiding the shaking of the counterweight body 1 after assembly.

[0046] In the embodiment of the present invention, the mounting column 201 can be a columnar structure protruding outward from any existing outer cylinder; for example: Figures 1 to 5 As shown, a mounting column 201 protruding horizontally forward is provided on the front side of the outer tube flange 2, the mounting column 201 is a cylinder with a center, and the outer peripheral wall of the cylinder is provided with sheet-like extension ribs protruding radially in different radial directions, and the outer peripheral extension ends of each sheet-like extension rib are all in the same circumference, and the above-mentioned same circumference is coaxially arranged with the central cylinder; preferably, in order to improve the stability of the mounting column 201 after being plugged into the mounting hole 101, a columnar boss 206 is provided at the connection between the mounting column 201 and the outer tube flange 2, and the columnar boss 206 is coaxially arranged with the mounting column 201, and The radial dimension of the outer circumference is larger than that of the mounting column 201, so that the columnar boss 206 is in relative fit contact with the rear side of the counterweight body 1 outside the mounting hole 101, so as to improve the reliability of the connection between the mounting column 201 and the outer cylinder; further preferably, in order to improve the reliability of the assembly of the counterweight body 1 and the outer cylinder, the columnar boss 206 is correspondingly inserted into the rear horizontal groove 103 of the counterweight body 1, and the outer peripheral side wall of the columnar boss 206 is in relative fit contact with the inner wall of the rear horizontal groove 103, so as to further limit the shaking of the counterweight body 1 in the vertical direction after assembly.

[0047] In the embodiment of the present invention, a bolt hole 202 opening forward is coaxially arranged on the mounting column 201, and the mounting bolt 3 is correspondingly inserted into the bolt hole 202. At least part of the inner wall of the bolt hole 202 is provided with an internal thread 205 that matches and meshes with the mounting bolt 3. The mounting bolt 3 is coaxially tightened on the bolt hole 202 of the mounting column 201 from front to back. The screw rod 302 of the mounting bolt is provided with an external thread 303, and the external thread 303 is threadedly engaged with the internal thread 205 provided on the bolt hole 202 to achieve fixed connection between the mounting bolt 3 and the mounting column 201; the outer diameter of the nut 301 of the mounting bolt 3 is larger than the metal sleeve The inner radial dimension of 104 enables the counterweight body 1 to be clamped and fixed in the horizontal front-to-back direction by the mounting bolts 3, so as to fix the assembled counterweight body 1 and the outer cylinder in the front-to-back direction and prevent the counterweight body 1 from falling off from the outer cylinder; preferably, a gasket 4 is passed through the screw rod 302 of the mounting bolt 3, and the outer radial dimension of the gasket 4 is larger than the outer radial dimension of the metal sleeve 104, and the inner radial dimension is smaller than the outer radial dimension of the nut 301, and the gasket 4 is clamped between the nut 301 and the counterweight body 1, so as to utilize the installed gasket 4 to clamp and limit the counterweight body 1 in the front-to-back direction.

[0048] In the embodiment of the present invention, a metal plate 203 is fixedly mounted on the mounting column 201, the metal plate 203 is perpendicular to the axial direction of the mounting column 201, a through hole 2031 is provided on the metal plate 203 and is coaxial with the bolt hole 202, an internal thread 205 is provided on the inner peripheral wall of the through hole 2031, the screw rod 302 of the mounting bolt 3 is at least partially inserted into the through hole 2031 of the metal plate 203, and the external thread 303 provided on the outer peripheral wall of the screw rod 302 is meshed and fixed with the internal thread 205 of the through hole 2031 provided on the metal plate 203, so that the mounting The bolt 3 is threadedly engaged and fixed with the metal insert added to the mounting column 201, thereby ensuring the reliability of the assembly between the mounting bolt and the outer cylinder; preferably, the mounting column 201 is provided with a mounting groove 204 open downward, and the metal plate 203 is inserted into the mounting groove 204 from bottom to top. The through hole 2031 provided at the center of the metal plate 203 is coaxial with and relatively penetrates the bolt hole 202 provided on the mounting column 201, so that the through hole 2031 constitutes a part of the bolt hole 202, so that the screw rod 302 of the mounting bolt 3 can pass through in sequence through threaded engagement. At the same time, the metal plate 203 is correspondingly inserted into the mounting groove 204, and the two sides of the metal plate 203 are respectively relatively fitted with the front and rear side walls of the mounting groove 204 to limit the movement of the metal plate 203 in the front and rear directions, thereby achieving the technical effect of limiting the metal plate 203 in the front and rear directions of the outer cylinder. Similarly, by embedding the metal plate 203 on the mounting column, the mounting column 201 made of plastic or other materials can still be reliably fixed by the added metal plate 203 and the mounting bolts 3, thereby effectively improving the assembly strength of the counterweight body 1 without increasing the cost of the washing machine.

[0049] In the embodiment of the present invention, an outer drum opening which passes through from front to back is provided on the outer drum opening flange 2, and three mounting columns 201 which are arranged at intervals along the circumference of the opening are provided on the lower side of the outer drum opening. The three mounting columns 201 are respectively and one by one inserted into metal sleeves 104 embedded in different mounting holes 101 on the same counterweight block body 1, so as to achieve the effect of stably installing the counterweight block body 1 installed on the outer drum of the washing machine.

[0050] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. A washing machine counterweight structure, comprising: The body of the counterweight is made of concrete; Features: The counterweight body is provided with mounting holes extending through the front and rear; A metal sleeve is arranged in the mounting hole and is used for plugging and assembling the counterweight structure with the mounting column arranged on the outer drum of the washing machine.

2. A washing machine counterweight structure according to claim 1, characterized in that: The metal sleeve is embedded and fixed on the inner wall of the mounting hole of the counterweight body; Preferably, the metal sleeve and the mounting hole are coaxially arranged with equal diameters, and the outer wall of the metal sleeve and the inner wall of the mounting hole are in close contact with each other.

3. A washing machine counterweight structure according to claim 1, characterized in that: The two ends of the metal sleeve are respectively provided with a circle of flange rings bent radially outward, and the two circles of flange rings are respectively in close contact with the front and rear side walls of the outer periphery of the mounting hole of the counterweight body, and are used to fix the metal sleeve and the counterweight body in the front and rear directions.

4. A washing machine counterweight structure according to any one of claims 1 to 3, characterized in that: The front and rear side walls of the counterweight block body are respectively provided with horizontal grooves recessed into the inside of the counterweight block body, the horizontal grooves on the front and rear sides are coaxially arranged, and the groove bottom centers of the horizontal grooves on both sides are horizontally arranged through the axis and connected to the mounting holes extending front and back; Preferably, the radial dimension of the front horizontal groove is smaller than the radial dimension of the rear horizontal groove; Further preferably, the horizontal grooves on the front and rear sides are both open grooves whose radial dimensions decrease from the groove opening toward the groove bottom.

5. A washing machine counterweight structure according to any one of claims 1 to 4, characterized in that: The counterweight body is provided with a plurality of mounting holes, and metal sleeves are respectively embedded in each mounting hole in a one-to-one correspondence.

6. A washing machine counterweight structure according to any one of claims 1 to 5, characterized in that: The body of the counterweight block is formed by pouring concrete slurry into a casting mold; Before pouring concrete of the counterweight body, the metal sleeve is pre-installed on the casting mold so that the metal sleeve constitutes a part of the casting mold, so that the metal sleeve can be directly embedded in the cast concrete counterweight body during the subsequent concrete pouring.

7. A drum washing machine, comprising: An outer cylinder, wherein a mounting column protruding horizontally from the front side is provided on the outer cylinder mouth flange; Features: It also includes the washing machine counterweight structure as described in any one of claims 1 to 6, wherein the mounting post is inserted from back to front into a metal sleeve embedded in the mounting hole provided on the counterweight body to assemble the counterweight body on the outer drum.

8. A drum washing machine according to claim 7, characterized in that: A bolt hole opening forward is coaxially arranged on the mounting column, and at least a part of the inner wall of the bolt hole is provided with an internal thread engaging with the mounting bolt, and the mounting bolt is coaxially tightened on the bolt hole of the mounting column from front to rear; the outer diameter of the nut of the mounting bolt is larger than the inner radial dimension of the metal sleeve, so that the counterweight body is clamped and fixed by the mounting bolt in the horizontal front and rear directions; Preferably, a gasket is provided on the mounting bolt, the outer circumferential radial dimension of the gasket is larger than the outer circumferential radial dimension of the metal sleeve, and the gasket is clamped between the nut and the counterweight body.

9. A drum washing machine according to claim 7, characterized in that: A metal plate is fixedly mounted on the mounting column, and a through hole is provided on the metal plate coaxially with the bolt hole, and an internal thread is provided on the inner peripheral wall of the through hole, and the external thread of the mounting bolt is meshed and fixed with the internal thread of the through hole provided on the metal plate; Preferably, a downwardly open mounting groove is provided on the mounting column, the metal plate is inserted into the mounting groove from bottom to top, and a through hole provided at the center of the metal plate is coaxially connected with a bolt hole provided on the mounting column.

10. A drum washing machine according to any one of claims 7 to 9, characterized in that: An outer cylinder mouth flange is provided with an outer cylinder mouth that passes through from front to back, and three mounting columns are arranged at intervals along the circumference of the mouth at the lower side of the outer cylinder mouth. The three mounting columns are respectively inserted into metal sleeves embedded in different mounting holes on the same counterweight body.

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