Injection mold for washing machine housing

Abstract

The present application discloses an injection mold for a washing machine housing, comprising an upper mold, a lower mold, a first molding device and a second molding device. The upper mold has a cavity matched with a product shell, the first molding device is installed on the upper mold and used to mold a groove body of the product shell, and the second molding device is installed on the lower mold and used to mold an inner shell of the product; when opening the mold, the first molding device is suitable for first separating from the groove body, and then the upper mold and the lower mold are separated from the mold to separate the product shell from the cavity; finally, the second molding device is suitable for ejecting the product and demolding it. The beneficial effects of the present application: the outer part of the washing machine housing is mainly molded through the cavity of the upper mold, and the cavity is continuous without interruption, so the outer surface of the molded washing machine housing will also be continuous and without parting lines, which greatly improves the appearance of the product.

Description

Technical Field

[0001] The present application relates to the field of mold technology, and in particular to an injection mold for a washing machine housing. Background Art

[0002] Injection molds are tools for producing plastic products; they are also tools that give plastic products a complete structure and precise dimensions. Injection molding is a processing method used in mass production of certain parts with complex shapes. Specifically, it refers to the process of injecting heated and melted plastic into the mold cavity under high pressure by an injection molding machine, and then cooling and solidifying to obtain a molded product.

[0003] like Figure 1 As shown, a washing machine housing 1 product is formed by an injection mold. However, the existing injection mold has the following shortcomings after molding the washing machine housing 1: there are multiple molding components involved in the product shell, so there will be many parting lines on the surface of the product shell, which will have a great impact on the appearance of the product, making the product appearance not beautiful enough and reducing the market competitiveness of the product. Therefore, an injection mold for a washing machine shell is proposed to solve the above technical problems. Summary of the invention

[0004] One of the purposes of the present application is to provide an injection mold for a washing machine housing.

[0005] In order to achieve the above objectives, the technical solution adopted in the present application is: an injection mold for a washing machine shell, comprising an upper mold, a lower mold, a first molding device and a second molding device, the upper mold having a cavity matching a product shell, the first molding device being installed on the upper mold and used for molding a groove body of the product shell, the second molding device being installed on the lower mold and used for molding an inner shell of the product; when opening the mold, the first molding device is suitable for first disengaging from the groove body, and then the upper mold and the lower mold are separated from the mold to separate the product shell from the cavity; finally, the second molding device is suitable for ejecting the product and demolding it.

[0006] Preferably, the second molding device includes a driving device, a shaping core block and a plurality of second core blocks, the shaping core block and the driving device are both installed on the lower mold, the second core block is movably installed on the output end of the driving device and cooperates with the shaping core block through a guide structure; when opening the mold, the driving device is suitable for driving the second core block to move upward, thereby lifting the product upward and separating it from the shaping core block, and at the same time, the second core block is suitable for moving horizontally under the action of the guide structure and separating it from the inner shell of the product.

[0007] Preferably, the guide structure comprises a slidably matched inclined guide groove and an inclined guide block; when opening the mold, the second core block is suitable for sliding upward along the fixed core block under the action of the inclined guide groove and the inclined guide block.

[0008] Preferably, the driving device includes a telescopic device and a top plate, the top plate is vertically slidably mounted on the lower mold and movably connected to the bottom end of the second core block, the telescopic device is vertically mounted on the top plate and the piston end is snap-fitted with the bottom of the lower mold.

[0009] Preferably, a clamping block is installed at the piston end of the telescopic device, and a connecting installation groove and a clamping groove are provided at the bottom of the lower mold; during installation, the clamping block is suitable for first entering from the installation groove, and then the clamping block is suitable for moving and cooperating with the clamping groove.

[0010] Preferably, a slider is rotatably mounted on the bottom end of the second core block, a slide groove is provided on the top plate, and the slider is slidably matched with the slide groove, thereby realizing a movable connection between the second core block and the top plate.

[0011] Preferably, the second core block includes a core body and a support rod, the bottom end of the support rod is movably mounted on the top plate, the top end of the support rod and the bottom end of the core body are detachably mounted, and the core body and the shaping core block are matched through the guide structure.

[0012] Preferably, a plurality of guide sleeves are provided in the lower mold, and the guide sleeves are sleeved on the outside of the support rod to achieve guiding and limiting of the support rod.

[0013] Preferably, the first molding device includes a driving component and a first core block, the first core block is horizontally slidably installed in the upper mold, the driving component is installed in the upper mold and is connected and cooperated with the first core block through a traction structure, and the driving component and the first core block are perpendicular to each other; when opening the mold, the driving component is suitable for driving the first core block to slide and move away from the product through the traction structure.

[0014] Preferably, the traction structure includes a first wedge block and a second wedge block, the first wedge block is installed on the first core block, and the second wedge block is installed on the output end of the driving component, the first wedge block and the second wedge block are inclined and slidably matched, and the installation positions of the first wedge block and the second wedge block are perpendicular to each other.

[0015] Compared with the prior art, the beneficial effects of this application are:

[0016] The present invention forms the exterior of the washing machine housing mainly through the cavity of the upper mold, and the cavity is continuous without interruption, so the outer surface of the molded washing machine housing will also be continuous and without parting lines, which greatly improves the appearance of the product; in addition, after the mold is opened, the second molding device can eject the washing machine housing, and the ejected washing machine housing can be separated from the second molding device, thereby realizing a later ejection and demolding process, which greatly improves the demolding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the existing washing machine housing after injection molding of the present invention.

[0018] Figure 2 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 3 It is a schematic diagram of the structure of the first molding component of the present invention.

[0020] Figure 4 for Figure 3 Schematic top view of .

[0021] Figure 5 It is a schematic diagram of the structure of the second molding component of the present invention.

[0022] Figure 6 It is a schematic diagram of the specific structure of the second molding component of the present invention.

[0023] Figure 7 It is a schematic diagram of the specific structure of the driving device of the present invention.

[0024] Figure 8 It is a schematic diagram of the movable installation method of the second core block of the present invention.

[0025] Fig. 9 It is a schematic structural diagram of the second core block and the shaping core block of the present invention.

[0026] Fig.10 It is a schematic diagram of the working principle of the second core block of the present invention.

[0027] In the figure: 1, washing machine housing; 101, parting line; 102, undercut; 2, trough body; 3, upper mold; 4, lower mold; 5, first molding device; 501, driving component; 502, first core block; 503, traction structure; 5031, first wedge block; 5032, second wedge block; 6, second molding device; 601, driving device; 6011, telescopic device; 6012, top plate; 602, shaping core block; 603, second core block; 6031, core body; 6032, support rod; 7, mounting groove; 8, clamping groove; 9, clamping block; 10, slider; 11, slide groove; 12, guide sleeve; 13, guide structure; 1301, oblique guide block; 1302, oblique guide groove. DETAILED DESCRIPTION

[0028] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0029] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific scope of protection of the present application.

[0030] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0031] One of the preferred embodiments of the present application is as follows: Figures 1 to 10 As shown, an injection mold for a washing machine housing includes an upper mold 3, a lower mold 4, a first molding device 5 and a second molding device 6. The upper mold 3 has a cavity that matches the outer shell of a product (washing machine housing 1). The first molding device 5 is installed on the upper mold 3 and is used to mold a groove body 2 of the product outer shell. The second molding device 6 is installed on the lower mold 4 and is used to mold an inner shell (internal cavity) of the product.

[0032] It can be understood that when opening the mold, the first molding device 5 is first separated from the trough body 2 outside the product, and then the upper mold 3 and the lower mold 4 are separated from the mold, so that the outer surface of the product is separated from the cavity of the upper mold 3, and finally the product is ejected and demolded by the second molding device 6 to realize the demolding process of the entire washing machine shell 1.

[0033] It should be known that the molding device (i.e., the second molding device 6) mainly used for molding the washing machine housing 1 is located inside it, and the outside of the washing machine housing 1 is mainly molded by the cavity of the upper mold 3. As we know, the cavity is continuous without interruption, so the outer surface of the molded washing machine housing 1 will also be continuous and without parting line 101, which greatly improves the appearance of the product. In addition, the second molding device 6 can also play the role of a "thrust pin mechanism", that is, after the mold is opened, the second molding device 6 can eject the washing machine housing 1, and the ejected washing machine housing 1 can be separated from the second molding device 6, thereby realizing a later demoulding process, which greatly improves the work efficiency.

[0034] It should be noted that if Figure 1 As shown, there is a (pair of) grooves 2 outside the product (washing machine housing 1), so the first molding device 5 used for molding will occupy a part of the upper mold 3, which is of course inevitable, and then there will be a parting line 101 at the junction of the first molding device 5 and the cavity of the upper mold 3, but the parting line 101 here is also located at the edge of the groove 2, so it will not affect the overall appearance of the washing machine housing 1. The "ejector mechanism" mentioned above is also a commonly used product ejection and demoulding mechanism in the mold field, so its structural principle will not be described in detail.

[0035] One of the embodiments of the present application is as follows: Figure 6 As shown, the second molding device 6 includes a driving device 601, a shaping core block 602 and a plurality of second core blocks 603. The shaping core block 602 and the driving device 601 are both installed on the lower mold 4. The second core block 603 is movably installed on the output end of the driving device 601 and cooperates with the shaping core block 602 through the guide structure 13.

[0036] It can be understood that when the mold is opened, the driving device 601 will drive the second core block 603 to move upward, thereby lifting the product upward, and the shaping core block 602 is fixedly installed, so the product will be separated from the shaping core block 602; of course, at the same time, while the second core block 603 moves upward, the second core block 603 will also move horizontally under the action of the guide structure 13, thereby separating the second core block 603 from the inner shell (internal cavity) of the product, thereby completing the entire second molding device 6 to eject and demold the product.

[0037] That is to say, when the mold is opened, the second core block 603 is moved upward at an angle. Therefore, while the second core block 603 as a whole moves upward to eject the product, the second core block 603 also has a partial displacement in the horizontal direction. The horizontal partial displacement can separate the second core block 603 from the inner shell of the product, thereby realizing the two processes of ejecting and demolding the product.

[0038] As a further description of the above embodiment: Fig. 9 As shown, the guide structure 13 includes a slidably matched inclined guide groove 1302 and an inclined guide block 1301; when the mold is opened, the second core block 603 slides upward along the molding core block 602 under the action of the inclined guide groove 1302 and the inclined guide block 1301.

[0039] Specifically, there are many ways to install the oblique guide groove 1302 and the oblique guide block 1301, including but not limited to the following two:

[0040] Method 1: If Fig. 9 As shown, the oblique guide block 1301 is arranged on the second core block 603, the oblique guide groove 1302 is arranged on the side of the shaping core block 602, and the oblique guide groove 1302 and the oblique guide block 1301 are obliquely slidably matched.

[0041] Mode 2: not shown, the oblique guide block 1301 is arranged on the side of the shaping core block 602, the oblique guide groove 1302 is arranged on the second core block 603, and the oblique guide groove 1302 and the oblique guide block 1301 are in inclined sliding cooperation with each other.

[0042] In one of the embodiments of the present application, Figure 7 As shown, the driving device 601 includes a telescopic device 6011 and a top plate 6012. The top plate 6012 is vertically slidably installed on the lower mold 4 and is movably connected to the bottom end of the second core block 603. The telescopic device 6011 is vertically installed on the top plate 6012 and the piston end is snap-fitted with the bottom of the lower mold 4.

[0043] It should be noted that the specific structure and working principle of the telescopic device 6011 are well-known technologies to those skilled in the art, so they will not be elaborated in detail here; common telescopic devices 6011 include hydraulic cylinders, pneumatic cylinders, and linear motors, etc., and those skilled in the art can choose according to actual needs; and in this application, hydraulic cylinders are preferably used.

[0044] It is understandable that when demoulding, the piston end of the hydraulic cylinder is extended, so that the cylinder barrel of the hydraulic cylinder can drive the top plate 6012 to rise, that is, the cylinder barrel of the hydraulic cylinder moves synchronously with the top plate 6012. It should be known that in the existing mold ejector mechanism, the cylinder barrel of the hydraulic cylinder is generally fixedly installed on the lower mold 4, and then the top plate 6012 is driven to move up and down by the piston rod. Therefore, in the specific design, it is necessary to consider that the installation position of the lower mold 4 must provide a certain avoidance space for the extension and contraction of the hydraulic cylinder, and then the installation of the hydraulic cylinder may require more space; and in the design of the present application, the cylinder barrel of the hydraulic cylinder is installed on the top plate 6012. Such a design cleverly utilizes the space of the top plate 6012, avoids the restriction of the installation position of the hydraulic cylinder on the lower mold 4 in the traditional design, and thus saves the overall space of the mold. In addition, since the cylinder barrel of the hydraulic cylinder moves with the top plate 6012, the piston rod of the hydraulic cylinder does not need to consider the avoidance problem of the lower mold 4 during the extension and contraction process, which improves the flexibility and practicality of the design.

[0045] On the other hand, based on the above embodiment, when a person skilled in the art installs the hydraulic cylinder, it is generally necessary to fix the cylinder barrel of the hydraulic cylinder (through bolts) on the top plate 6012, and one end of the piston end (rod) of the hydraulic cylinder also needs to be fixedly connected (through screws) to the bottom of the lower mold 4. In the design of the present application, the piston end of the hydraulic cylinder and the lower mold 4 are detachably installed in a convenient snap-fit ​​manner, that is, it is only necessary to fix the cylinder barrel of the hydraulic cylinder on the top plate 6012 through bolts, which can greatly improve the convenience of subsequent maintenance and replacement.

[0046] Specifically, Figure 7 As shown, the specific clamping method between the piston end of the telescopic device 6011 (i.e., the hydraulic cylinder) and the lower mold 4 is as follows: a clamping block 9 is fixedly installed at the piston end of the telescopic device 6011, and a connecting mounting groove 7 and a clamping groove 8 are provided at the bottom of the lower mold 4. When installing the telescopic device 6011: first, insert the clamping block 9 from the mounting groove 7, then move the clamping block 9 toward the clamping groove 8, so that the clamping block 9 and the clamping groove 8 are clamped and matched, and finally, the cylinder barrel of the telescopic device 6011 is fixedly installed on the top plate 6012 by bolts, so that the entire hydraulic cylinder can be installed between the top plate 6012 and the lower mold 4.

[0047] In this embodiment, Figure 6 and Figure 8As shown, the movable installation method between the bottom end of the second core block 603 and the top plate 6012 is as follows: a slider 10 is provided at the bottom end of the second core block 603, the slider 10 is rotatably provided between the second core block 603, a slide groove 11 is provided on the top plate 6012, and the slider 10 is slidably matched with the slide groove 11. It can be understood that the second core block 603 can rotate and slide along the top plate 6012, thereby matching the inclined sliding of the second core block 603 along the fixed core block 602.

[0048] Based on the above embodiments, we know that the upper part of the second core block 603 cooperates with the shaping core block 602 to form the inner cavity of the product, while the lower part needs to be connected to the top plate 6012 to realize the subsequent demolding process. Therefore, the working environment and functions of the upper and lower parts of the second core block 603 are different. For example, the upper part needs to be resistant to high temperatures and needs to have high hardness and wear resistance to ensure that the fine structure of the inner cavity of the product can be stably molded during the injection molding process; and the lower part needs to have good support so that it can smoothly rotate and slide along the top plate 6012 during the demolding process, while bearing the force transmitted by the top plate 6012 and the hydraulic cylinder; thereby making the service life of the upper and lower parts of the second core block 603 different.

[0049] Therefore, Fig. 9 As shown, we can divide the second core block 603 into two parts, which include the core body 6031 of the upper part and the support rod 6032 of the lower part. It should be known that the core body 6031 cooperates with the shaping core block 602 through the guide structure 13, and the bottom end of the support rod 6032 is movably installed on the top plate 6012. We can detachably install the top end of the support rod 6032 and the bottom end of the core body 6031 (for example, bolt installation), so that in the later stage, when either of the support rod 6032 and the core body 6031 is damaged, it can be replaced accordingly according to the actual situation without replacing the entire second core block 603.

[0050] Furthermore, since the core body 6031 and the shaping core block 602 are matched in an inclined sliding manner, the shaping core block 602 actually plays a guiding and limiting role for the core body 6031; therefore, in order to play the same limiting and supporting role for the support rod 6032 to improve the stability of the support rod 6032, a plurality of guide sleeves 12 can be arranged in the lower mold 4, that is, the guide sleeves 12 are sleeved on the outside of the support rod 6032.

[0051] In one of the embodiments of the present application, Figure 3 and Figure 4As shown, the first molding device 5 includes a driving component 501 and a first core block 502. The first core block 502 is horizontally slidably installed in the upper mold 3. The driving component 501 is installed in the upper mold 3 and is connected and matched with the first core block 502 through a traction structure 503. It can be understood that when opening the mold, the driving component 501 can drive the first core block 502 to slide and move away from the product through the traction structure 503, thereby realizing the demolding of the first core block 502 between the product trough body 2. The driving component 501 here is the same as the above-mentioned telescopic device 6011, that is, the driving component 501 is also preferably a hydraulic cylinder.

[0052] It should be noted that, in fact, there are grooves 2 on both sides of the product (washing machine housing 1), so a pair of first core blocks 502 need to be provided, such as Figure 3 As shown, the two first core blocks 502 are respectively arranged on the left and right sides of the product, and a pair of hydraulic cylinders are also required. When the technicians in this field perform general design, one end of the piston rod of the hydraulic cylinder is definitely installed in the middle of the first core block 502, and the hydraulic cylinder and the first core block 502 are installed in a straight line, which will make the left and right lengths of the entire mold very long, and thus the mold requires a larger volume; and the front and rear positions cannot be fully utilized, so that the overall space cannot be well coordinated.

[0053] In this application, the driving component 501 is connected and matched with the first core block 502 through the traction structure 503, and the driving component 501 and the first core block 502 are in a vertical relationship, that is, the driving component 501 occupies the front and rear positions of the mold, so that the overall structure of the mold is more compact and the space utilization rate is significantly improved. At the same time, this vertical installation method shortens the left and right lengths of the mold, thereby reducing the total volume of the mold.

[0054] The present application does not limit the specific structure of the traction structure 503. A specific example is provided below for reference:

[0055] like Figure 4 As shown, the traction structure 503 includes a first wedge block 5031 and a second wedge block 5032. The first wedge block 5031 is installed on the first core block 502, and the second wedge block 5032 is installed on the output end (one end of the piston rod) of the driving component 501. The first wedge block 5031 and the second wedge block 5032 are matched with each other in an inclined sliding manner, and the installation positions of the first wedge block 5031 and the second wedge block 5032 are perpendicular to each other.

[0056] It can be understood that the wedge surfaces of the first wedge block 5031 and the second wedge block 5032 are in an inclined sliding fit; Figure 4For example, when the driving component 501 is shortened to drive the second wedge block 5032 to move downward, the first wedge block 5031 will move in a direction away from the product under the traction of the second wedge block 5032, and the moving paths of the first wedge block 5031 and the second wedge block 5032 are perpendicular to each other.

[0057] The working principle of the present invention is:

[0058] When the product needs to be molded, first Figure 4 As shown, the driving component 501 shortens and drives the second wedge block 5032 to move, and the first wedge block 5031 will move in the direction away from the product under the traction of the second wedge block 5032, thereby separating the first core block 502 from the product's slot body 2, and then separating the upper mold 3 from the lower mold 4, so that the product is separated from the cavity in the upper mold 3. It should be explained why the product will not be separated from the core blocks (i.e., the shaping core block 602 and the plurality of second core blocks 603) in the lower mold 4 at this time: Figure 1 As shown, there are many undercuts 102 on the inner surface of the product (the second core block 603 is used to form these undercuts 102), so there is a limiting force between the second core block 603 and the undercuts 102, so that the product at this time is locked in the core block of the lower mold 4.

[0059] like Figure 6 As shown, the telescopic device 6011 is started to extend so that the top plate 6012 moves vertically upward, and the top plate 6012 drives the second core block 603 to rise, as shown in FIG. Fig.10 As shown, the second core block 603 slides upward along the shaping core block 602 under the action of the guide structure 13, so that the product is separated from the shaping core block 602. Of course, at the same time, the second core block 603 will have a partial displacement in the horizontal direction, that is, the second core block 603 will also move toward the center position of the product, so that the second core block 603 can be separated and demoulded from the inner cavity of the product, and the second core block 603 will also be inverted 102 for separation and dislocation, so as to realize the demoulding process of the entire product.

[0060] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. An injection mold for a washing machine housing, characterized in that: include: An upper mold, a lower mold, a first molding device and a second molding device, wherein the upper mold has a cavity matched with the product shell, the first molding device is installed on the upper mold and used to mold the groove body of the product shell, and the second molding device is installed on the lower mold and used to mold the product inner shell; When opening the mold, the first molding device is suitable for first separating from the trough body, and then the upper mold and the lower mold are separated from the mold, so that the product shell is separated from the cavity; finally, the second molding device is suitable for ejecting the product and demolding it; The second molding device comprises a driving device, a shaping core block and a plurality of second core blocks, the shaping core block and the driving device are both mounted on the lower mold, the second core block is movably mounted on the output end of the driving device and cooperates with the shaping core block through a guide structure; when opening the mold, the driving device is suitable for driving the second core block to move upward, thereby lifting the product upward and separating from the shaping core block, and the second core block is suitable for horizontally moving under the action of the guide structure and separating from the inner shell of the product; The guide structure comprises a slidably matched inclined guide groove and an inclined guide block; when the mold is opened, the second core block is suitable for sliding upward along the fixed core block under the action of the inclined guide groove and the inclined guide block; The driving device includes a telescopic device and a top plate. The top plate is vertically slidably mounted on the lower mold and movably connected to the bottom end of the second core block. The telescopic device is vertically mounted on the top plate and the piston end is snap-fitted with the bottom of the lower mold.

2. The injection mold for the washing machine housing according to claim 1, characterized in that: A clamping block is installed at the piston end of the telescopic device, and a connecting installation groove and a clamping groove are provided at the bottom of the lower mold; during installation, the clamping block is suitable for first entering from the installation groove, and then the clamping block is suitable for moving and cooperating with the clamping groove.

3. The injection mold for the washing machine housing according to claim 1, characterized in that: A slider is rotatably mounted on the bottom end of the second core block, a slide groove is provided on the top plate, and the slider is slidably matched with the slide groove to achieve a movable connection between the second core block and the top plate.

4. The injection mold for the washing machine housing according to claim 1, characterized in that: The second core block includes a core body and a support rod, the bottom end of the support rod is movably mounted on the top plate, the top end of the support rod and the bottom end of the core body are detachably mounted, and the core body and the shaping core block are matched through the guide structure.

5. The injection mold for the washing machine housing according to claim 4, characterized in that: A plurality of guide sleeves are arranged in the lower die, and the guide sleeves are sleeved on the outside of the support rod to achieve guiding and limiting of the support rod.

6. The injection mold for the washing machine housing according to claim 1, characterized in that: The first molding device includes a driving component and a first core block. The first core block is horizontally slidably installed in the upper mold. The driving component is installed in the upper mold and is connected and cooperated with the first core block through a traction structure. The driving component and the first core block are perpendicular to each other. When opening the mold, the driving component is suitable for driving the first core block to slide and move away from the product through the traction structure.

7. The injection mold for the washing machine housing according to claim 6, characterized in that: The traction structure includes a first wedge block and a second wedge block, the first wedge block is installed on the first core block, and the second wedge block is installed on the output end of the driving component. The first wedge block and the second wedge block are matched with each other in an inclined sliding manner, and the installation positions of the first wedge block and the second wedge block are perpendicular to each other.

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