Movable jaw assembly of jaw crusher

Abstract

The invention discloses a movable jaw assembly of a jaw crusher. According to the device, a semicircular groove is formed in the side, facing a toggle plate, of a movable jaw plate; the inner sides of the limiting rings are semicircular cambered surfaces, the limiting rings are erected on the semicircular grooves at intervals, and the semicircular cambered surfaces and the semicircular grooves form a complete inner circular surface; a pin hole is formed in the limiting ring; the multiple connecting plates are arranged on the hinge shaft at intervals, and the interval distance between the connecting plates is larger than the width of the limiting ring. The toggle plate lining base is in a circular ring shape and is arranged in the inner circular face, the outer circular face of the toggle plate lining base is tightly attached to the inner circular face, and a pin groove is formed in the toggle plate lining base. The positioning pin penetrates through the pin hole and is inserted into the pin groove; the hinge shaft and the inner ring face of the toggle plate lining seat are coaxially arranged, the hinge shaft is tightly attached to the inner ring face of the toggle plate lining seat, the hinge shaft can rotate around the center axis of the hinge shaft in the inner ring face of the toggle plate lining seat, and the connecting plate extends out of the interval between the limiting rings. According to the invention, the contact area between the toggle plate lining seat and the movable jaw plate can be increased, and the connection stability is improved.

Description

Technical Field

[0001] The invention relates to the field of crushers, and in particular to a movable jaw assembly of a jaw crusher. Background Art

[0002] Jaw crusher, commonly known as jaw crusher, also known as tiger mouth, consists of two jaw plates, movable jaw and static jaw, forming a crushing chamber. It simulates the movement of animal jaws to complete material crushing operations. It is widely used in the crushing of various ores and large materials in mining and smelting, building materials, highways, railways, water conservancy, chemical industry and other industries.

[0003] A toggle plate for transmitting power and acting as a safety device is provided inside the jaw crusher. One end of the toggle plate is connected to the movable jaw through a toggle plate liner. A semicircular groove is provided on the movable jaw. The toggle plate liner is fixed in the semicircular groove by a locating pin. The locating pin is provided at the bottom of the groove. One end of the toggle plate is hinged to the toggle plate liner to connect the toggle plate and the movable jaw, and the other end of the toggle plate is connected to the adjustment device. However, this connection method has many disadvantages. The contact area between the semicircular groove and the toggle plate liner is small, which can easily lead to accelerated wear and easy de-groove, affecting the stability of the connection. Moreover, the locating pin is located at the bottom of the groove, making installation and maintenance difficult. During the crushing process, the pin is prone to loosening due to vibration, resulting in unstable operation of the equipment.

[0004] For example, a jaw crusher with authorization announcement number CN 204017884 U has a movable jaw with a groove, and a toggle plate gasket is installed in the groove by means of fixing bolts. The toggle plate and the toggle plate gasket are connected by mutual abutment. In this connection method, the contact area between the toggle plate gasket and the groove is small, the connection is unstable, and the installation position of the fixing bolt is at the bottom of the groove, which makes installation and maintenance difficult. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and to propose a movable jaw assembly for a jaw crusher, which can increase the contact area between the toggle plate liner and the movable jaw plate, improve the stability of the connection, reduce the difficulty of installation and maintenance work, and improve the operating stability of the overall device.

[0006] To achieve the above objectives, the present invention proposes the following technical solutions: A movable jaw assembly of a jaw crusher comprises a movable jaw plate, a toggle plate, a toggle plate liner and a positioning pin.

[0007] A semicircular groove is provided on the side of the movable jaw plate facing the elbow plate, and a plurality of limiting rings are provided on the movable jaw plate; the inner side of the limiting ring is a semicircular arc surface, and the limiting rings are arranged on the semicircular groove at intervals, and the semicircular arc surface on the inner side of the limiting ring and the semicircular groove form a plurality of complete inner circular surfaces; a pin hole is provided on the limiting ring.

[0008] The toggle plate comprises a hinge shaft and a connecting plate. A plurality of connecting plates are provided and are arranged on the hinge shaft at intervals. The interval distance between the connecting plates is greater than the width of the limiting ring.

[0009] The toggle plate liner is annular and is placed inside the inner circular surface. The toggle plate liner and the inner circular surface are coaxially arranged. The outer ring surface of the toggle plate liner is in close contact with the inner circular surface. The width of the toggle plate liner is not greater than the width of the limiting ring. A pin groove is provided on the toggle plate liner.

[0010] The positioning pin passes through the pin hole and is inserted into the pin groove to realize the positioning of the toggle plate liner on the movable jaw plate.

[0011] The articulated shaft passes through the inner annular surface of the toggle plate seat, and the articulated shaft is coaxially arranged with the inner annular surface of the toggle plate seat. The articulated shaft is tightly attached to the inner annular surface of the toggle plate seat, and the articulated shaft can rotate around the central axis of the articulated shaft within the inner annular surface of the toggle plate seat to form a connection between the toggle plate and the movable jaw plate, and the connecting plate extends from the gap between the limit rings.

[0012] Preferably, the limiting ring is integrally arranged with the movable jaw plate.

[0013] Preferably, the material of the toggle plate liner is ZGMn13, which is a high manganese cast steel with good wear resistance and toughness.

[0014] Preferably, the width of the semicircular groove is greater than the length of the hinge shaft.

[0015] Preferably, the connecting plate is welded to the hinge shaft.

[0016] Preferably, the height of the connecting plate is 0.5-0.7 of the diameter of the hinge shaft.

[0017] Preferably, the connecting plate is detachably connected to the hinge shaft, by snap connection, threaded connection or other detachable connection methods.

[0018] Preferably, the connecting plate is threadedly connected to the hinge shaft.

[0019] Preferably, the hinge shaft is provided with a plurality of threaded holes, and one end of the connecting plate is provided with a stud, which is threadedly connected to the threaded hole to facilitate disassembly of the hinge shaft and the connecting plate.

[0020] Preferably, the hinge shaft is provided with a plurality of grooves, the inner bottom surface of the groove is a plane, a threaded hole is provided on the inner bottom surface of the groove, a stud is provided at one end of the connecting plate, the stud is threadedly connected to the threaded hole, the plane where the bottom of the stud is located is in contact with the inner bottom surface of the groove, the plane where the bottom of the stud is located can rotate around the threaded hole on the inner bottom surface of the groove, and the edge of the groove will not hinder the rotation of the plane where the bottom of the stud is located, thereby further ensuring the connection stability of the hinge shaft and the connecting plate.

[0021] Preferably, the depth of the threaded hole is 0.4-0.6 of the diameter of the hinge shaft.

[0022] Preferably, the depth of the threaded hole is 0.5 of the diameter of the hinge shaft.

[0023] The depth of the threaded hole on the articulated shaft has a great influence on the connection stability, processing difficulty and maintenance convenience of the connecting plate and the articulated shaft. If the threaded hole is too deep, it will affect the stress distribution near the threaded hole on the articulated shaft, thereby affecting the fatigue life of the articulated shaft, and will also increase the difficulty and cost of processing and maintenance difficulty; if the threaded hole is too shallow, it will reduce the connection strength and connection stability between the connecting plate and the articulated shaft.

[0024] Preferably, the center line of the threaded hole is perpendicular to the center axis of the hinge shaft.

[0025] The beneficial effects of the present invention are: The present invention arranges a semicircular groove on the movable jaw plate, a limiting ring and the semicircular groove form an inner circular surface, and an annular toggle plate liner is placed in the inner circular surface, thereby increasing the contact area between the toggle plate liner and the movable jaw plate and improving the stability of the connection.

[0026] The present invention arranges a pin hole on the limit ring, arranges a positioning pin on the side facing the toggle plate, and inserts the positioning pin into the pin groove through the pin hole, thereby realizing the positioning of the toggle plate liner on the movable jaw plate, reducing the difficulty of installation and maintenance work and improving the operating stability of the overall device.

[0027] By adopting the above scheme, the present invention increases the contact area between the toggle plate liner and the movable jaw plate, improves the stability of the connection, reduces the difficulty of installation and maintenance work, and improves the operating stability of the overall device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0029] Figure 1 It is a schematic diagram of the overall structure of the movable jaw assembly.

[0030] Figure 2 yes Figure 1 Cross-sectional view at AA in the middle.

[0031] Figure 3 is an exploded view of the bracket in the second embodiment.

[0032] Figure 4 1 is an exploded view of the bracket in the third embodiment.

[0033] In the figure, 1-movable jaw plate, 2-elbow plate, 3-elbow plate liner, 4-locating pin, 11-semicircular groove, 12-limiting ring, 121-pin hole, 21-hinge shaft, 22-connecting plate, 211-threaded hole, 212-groove, 221-stud. DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0036] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0038] First embodiment: like Figure 1~2 As shown, a movable jaw assembly of a jaw crusher includes a movable jaw plate 1, a toggle plate 2, a toggle plate liner 3 and a positioning pin 4.

[0039] A semicircular groove 11 is provided on the side of the movable jaw plate 1 facing the elbow plate 2, and a plurality of limiting rings 12 are provided on the movable jaw plate 1; the inner side of the limiting ring 12 is a semicircular arc surface, and the limiting rings 12 are arranged on the semicircular groove 11 at intervals, and the semicircular arc surface on the inner side of the limiting ring 12 and the semicircular groove 11 form a plurality of inner circular surfaces; a pin hole 121 is provided on the limiting ring 12.

[0040] The toggle plate 2 includes a hinge shaft 21 and a connecting plate 22. The connecting plates 22 are provided in plurality and are arranged on the hinge shaft 21 at intervals. The interval between the connecting plates 22 is greater than the width of the limiting ring 12. The toggle plate liner 3 is annular and is placed inside the inner circular surface. The toggle plate liner 3 is coaxially arranged with the inner circular surface. The outer annular surface of the toggle plate liner 3 is in close contact with the inner circular surface. The width of the toggle plate liner 3 is not greater than the width of the limiting ring 12. A pin groove is provided on the toggle plate liner 3.

[0041] The positioning pin 4 passes through the pin hole 121 and is inserted into the pin groove to realize the positioning of the toggle plate liner 3 on the movable jaw plate 1 .

[0042] The articulated shaft 21 passes through the inner annular surface of the toggle plate liner 3, and the articulated shaft 21 is coaxially arranged with the inner annular surface of the toggle plate liner 3. The articulated shaft 21 is tightly attached to the inner annular surface of the toggle plate liner 3, and the articulated shaft 21 can rotate around the central axis of the articulated shaft 21 within the inner annular surface of the toggle plate liner 3. The connecting plate 22 extends from the gap between the limit rings 12.

[0043] Second embodiment: like Figure 1~2 As shown, a movable jaw assembly of a jaw crusher includes a movable jaw plate 1, a toggle plate 2, a toggle plate liner 3 and a positioning pin 4.

[0044] A semicircular groove 11 is provided on the side of the movable jaw plate 1 facing the elbow plate 2, and a plurality of limiting rings 12 are provided on the movable jaw plate 1; the inner side of the limiting ring 12 is a semicircular arc surface, and the limiting rings 12 are arranged on the semicircular groove 11 at intervals, and the semicircular arc surface on the inner side of the limiting ring 12 and the semicircular groove 11 form a plurality of inner circular surfaces; a pin hole 121 is provided on the limiting ring 12.

[0045] The toggle plate 2 includes a hinge shaft 21 and a connecting plate 22. The connecting plates 22 are provided in plurality and are arranged on the hinge shaft 21 at intervals. The interval between the connecting plates 22 is greater than the width of the limiting ring 12. The toggle plate liner 3 is annular and is placed inside the inner circular surface. The toggle plate liner 3 is coaxially arranged with the inner circular surface. The outer annular surface of the toggle plate liner 3 is in close contact with the inner circular surface. The width of the toggle plate liner 3 is not greater than the width of the limiting ring 12. A pin groove is provided on the toggle plate liner 3.

[0046] The positioning pin 4 passes through the pin hole 121 and is inserted into the pin groove to realize the positioning of the toggle plate liner 3 on the movable jaw plate 1 .

[0047] The articulated shaft 21 passes through the inner annular surface of the toggle plate liner 3, and the articulated shaft 21 is coaxially arranged with the inner annular surface of the toggle plate liner 3. The articulated shaft 21 is tightly attached to the inner annular surface of the toggle plate liner 3, and the articulated shaft 21 can rotate around the central axis of the articulated shaft 21 within the inner annular surface of the toggle plate liner 3. The connecting plate 22 extends from the gap between the limit rings 12.

[0048] like Figure 3 As shown, the hinge shaft 21 is provided with a plurality of threaded holes 211 , and one end of the connecting plate 22 is provided with a stud 221 , which is threadedly connected to the threaded hole 211 , so as to facilitate the disassembly of the hinge shaft 21 and the connecting plate 22 .

[0049] Third embodiment: like Figure 1~2 As shown, a movable jaw assembly of a jaw crusher includes a movable jaw plate 1, a toggle plate 2, a toggle plate liner 3 and a positioning pin 4.

[0050] A semicircular groove 11 is provided on the side of the movable jaw plate 1 facing the elbow plate 2, and a plurality of limiting rings 12 are provided on the movable jaw plate 1; the inner side of the limiting ring 12 is a semicircular arc surface, and the limiting rings 12 are arranged on the semicircular groove 11 at intervals, and the semicircular arc surface on the inner side of the limiting ring 12 and the semicircular groove 11 form a plurality of inner circular surfaces; a pin hole 121 is provided on the limiting ring 12.

[0051] The toggle plate 2 includes a hinge shaft 21 and a connecting plate 22. The connecting plates 22 are provided in plurality and are arranged on the hinge shaft 21 at intervals. The interval between the connecting plates 22 is greater than the width of the limiting ring 12. The toggle plate liner 3 is annular and is placed inside the inner circular surface. The toggle plate liner 3 is coaxially arranged with the inner circular surface. The outer annular surface of the toggle plate liner 3 is in close contact with the inner circular surface. The width of the toggle plate liner 3 is not greater than the width of the limiting ring 12. A pin groove is provided on the toggle plate liner 3.

[0052] The positioning pin 4 passes through the pin hole 121 and is inserted into the pin groove to realize the positioning of the toggle plate liner 3 on the movable jaw plate 1 .

[0053] The articulated shaft 21 passes through the inner annular surface of the toggle plate liner 3, and the articulated shaft 21 is coaxially arranged with the inner annular surface of the toggle plate liner 3. The articulated shaft 21 is tightly attached to the inner annular surface of the toggle plate liner 3, and the articulated shaft 21 can rotate around the central axis of the articulated shaft 21 within the inner annular surface of the toggle plate liner 3. The connecting plate 22 extends from the gap between the limit rings 12.

[0054] like Figure 4 As shown, the hinge shaft 21 is provided with a plurality of grooves 212, the inner bottom surface of the groove 212 is a plane, a threaded hole 211 is provided on the inner bottom surface of the groove 212, a stud 221 is provided at one end of the connecting plate 22, the stud 221 is threadedly connected to the threaded hole 211, the plane where the bottom of the stud 221 is located is in contact with the inner bottom surface of the groove 212, the plane where the bottom of the stud 221 is located can rotate around the threaded hole 211 on the inner bottom surface of the groove 212, and the edge of the groove 212 will not hinder the rotation of the plane where the bottom of the stud 221 is located, thereby further ensuring the connection stability of the hinge shaft 21 and the connecting plate 22.

[0055] The depth of the threaded hole is 0.4-0.6 of the diameter of the hinge shaft 21.

[0056] The depth of the threaded hole on the articulated shaft has a great influence on the connection stability, processing difficulty and maintenance convenience of the connecting plate and the articulated shaft. If the threaded hole is too deep, it will affect the stress distribution near the threaded hole on the articulated shaft, thereby affecting the fatigue life of the articulated shaft, and will also increase the difficulty and cost of processing and maintenance difficulty; if the threaded hole is too shallow, it will reduce the connection strength and connection stability between the connecting plate and the articulated shaft.

[0057] Fourth embodiment: like Figure 1~2 As shown, a movable jaw assembly of a jaw crusher includes a movable jaw plate 1, a toggle plate 2, a toggle plate liner 3 and a positioning pin 4.

[0058] A semicircular groove 11 is provided on the side of the movable jaw plate 1 facing the elbow plate 2, and a plurality of limiting rings 12 are provided on the movable jaw plate 1; the inner side of the limiting ring 12 is a semicircular arc surface, and the limiting rings 12 are arranged on the semicircular groove 11 at intervals, and the semicircular arc surface on the inner side of the limiting ring 12 and the semicircular groove 11 form a plurality of inner circular surfaces; a pin hole 121 is provided on the limiting ring 12.

[0059] The toggle plate 2 includes a hinge shaft 21 and a connecting plate 22. The connecting plates 22 are provided in plurality and are arranged on the hinge shaft 21 at intervals. The interval between the connecting plates 22 is greater than the width of the limiting ring 12. The toggle plate liner 3 is annular and is placed inside the inner circular surface. The toggle plate liner 3 is coaxially arranged with the inner circular surface. The outer annular surface of the toggle plate liner 3 is in close contact with the inner circular surface. The width of the toggle plate liner 3 is not greater than the width of the limiting ring 12. A pin groove is provided on the toggle plate liner 3.

[0060] The positioning pin 4 passes through the pin hole 121 and is inserted into the pin groove to realize the positioning of the toggle plate liner 3 on the movable jaw plate 1 .

[0061] The articulated shaft 21 passes through the inner annular surface of the toggle plate liner 3, and the articulated shaft 21 is coaxially arranged with the inner annular surface of the toggle plate liner 3. The articulated shaft 21 is tightly attached to the inner annular surface of the toggle plate liner 3, and the articulated shaft 21 can rotate around the central axis of the articulated shaft 21 within the inner annular surface of the toggle plate liner 3. The connecting plate 22 extends from the gap between the limit rings 12.

[0062] like Figure 4As shown, the hinge shaft 21 is provided with a plurality of grooves 212, the inner bottom surface of the groove 212 is a plane, a threaded hole 211 is provided on the inner bottom surface of the groove 212, a stud 221 is provided at one end of the connecting plate 22, the stud 221 is threadedly connected to the threaded hole 211, the plane where the bottom of the stud 221 is located is in contact with the inner bottom surface of the groove 212, the plane where the bottom of the stud 221 is located can rotate around the threaded hole 211 on the inner bottom surface of the groove 212, and the edge of the groove 212 will not hinder the rotation of the plane where the bottom of the stud 221 is located, thereby further ensuring the connection stability of the hinge shaft 21 and the connecting plate 22.

[0063] The depth of the threaded hole is 0.5 of the diameter of the hinge shaft 21 .

[0064] The depth of the threaded hole on the articulated shaft has a great influence on the connection stability, processing difficulty and maintenance convenience of the connecting plate and the articulated shaft. If the threaded hole is too deep, it will affect the stress distribution near the threaded hole on the articulated shaft, thereby affecting the fatigue life of the articulated shaft, and will also increase the difficulty and cost of processing and maintenance difficulty; if the threaded hole is too shallow, it will reduce the connection strength and connection stability between the connecting plate and the articulated shaft.

[0065] The following experiments were conducted for the technical solutions of the third and fourth embodiments: Different toggle plates are designed, and the depth of the threaded holes on the hinge shafts of different toggle plates is different. The depth of the threaded holes is 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, and 0.9 of the diameter of the hinge shaft, respectively, and other conditions are the same. The threaded holes on the same hinge shaft are consistent. The connecting plate with studs is threadedly connected to the threaded holes, and the height of the studs matches the depth of the threaded holes.

[0066] The toggle plate composed of the articulated shaft and the connecting plate is connected with the movable jaw plate through the same toggle plate liner.

[0067] The jaw crusher uses a series of movable jaw components provided in this experiment to carry out dynamic experiments. During the crushing operation, the hinge shaft rotates in the toggle plate liner. Under the same working environment, the connection stability of different toggle plates is tested.

[0068] Table 1 Fatigue test data of different brackets

[0069] Fatigue failure includes damage to the articulated shaft or the connecting plate itself at the connection point, and connection failure refers to the disconnection of the connection between the articulated shaft and the connecting plate.

[0070] It can be seen from Table 1 that when the threaded hole depth is 0.1~0.3d and 0.7~0.9d, the continuous working time when fatigue damage or connection damage occurs is less than 200h, which does not meet the working requirements of the jaw crusher, the maintenance cost is quite high, and the economy is poor; when the threaded hole depth is 0.4~0.6d, the continuous working time when fatigue damage or connection damage occurs is more than 200h, which meets the working requirements of the jaw crusher, the maintenance cost is not high, and the economy is good; especially when the threaded hole depth is 0.5d, the continuous working time when fatigue damage or connection damage occurs is as high as 298h, indicating that the connection strength and connection stability between the articulated shaft on the toggle plate and the connecting plate are the strongest, while the maintenance cost is minimized, and the economy is optimal.

[0071] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A movable jaw assembly of a jaw crusher, comprising a movable jaw plate, a toggle plate, a toggle plate liner and a positioning pin, characterized in that: A semicircular groove is provided on the side of the movable jaw plate facing the elbow plate, and a plurality of limit rings are provided on the movable jaw plate; the inner side of the limit ring is a semicircular arc surface, and the limit rings are arranged at intervals on the semicircular groove, and the semicircular arc surface and the semicircular groove form a complete inner circular surface; a pin hole is provided on the limit ring; the elbow plate includes a hinge shaft and a connecting plate, and the connecting plates are provided with a plurality of, which are arranged at intervals on the hinge shaft, and the spacing distance between the connecting plates is greater than the width of the limit ring; the elbow plate liner is annular, placed in the inner circular surface, the outer ring surface of the elbow plate liner is tightly attached to the inner circular surface, and a pin groove is provided on the elbow plate liner; the locating pin passes through the pin hole and is inserted into the pin groove; the hinge shaft is coaxially arranged with the inner ring surface of the elbow plate liner, the hinge shaft is tightly attached to the inner ring surface of the elbow plate liner, the hinge shaft can rotate around the central axis of the hinge shaft in the inner ring surface of the elbow plate liner, and the connecting plate extends from the interval between the limit rings.

2. The movable jaw assembly of a jaw crusher according to claim 1, characterized in that: The limiting ring is integrally arranged with the movable jaw plate.

3. The movable jaw assembly of a jaw crusher according to claim 1, characterized in that: The material of the toggle plate liner is ZGMn13.

4. The movable jaw assembly of a jaw crusher according to claim 1, characterized in that: The width of the semicircular groove is greater than the length of the hinge shaft.

5. The movable jaw assembly of a jaw crusher according to claim 1, characterized in that: The connecting plate is detachably connected to the hinge shaft.

6. The movable jaw assembly of a jaw crusher according to claim 5, characterized in that: The connecting plate is threadedly connected to the hinge shaft.

7. The movable jaw assembly of a jaw crusher according to claim 6, characterized in that: The hinge shaft is provided with a plurality of threaded holes, and one end of the connecting plate is provided with a stud, which is threadedly connected with the threaded hole.

8. The movable jaw assembly of a jaw crusher according to claim 6, characterized in that: The hinge shaft is provided with multiple grooves, the inner bottom surface of the groove is a plane, and a threaded hole is provided on the inner bottom surface of the groove. A stud is provided at one end of the connecting plate, and the stud is threadedly connected to the threaded hole. The plane where the bottom of the stud is located contacts with the inner bottom surface of the groove, and the plane where the bottom of the stud is located can rotate around the threaded hole on the inner bottom surface of the groove.

9. A movable jaw assembly of a jaw crusher according to claim 7 or 8, characterized in that: The center line of the threaded hole is perpendicular to the center axis of the hinge shaft; the depth of the threaded hole is 0.4-0.6 of the diameter of the hinge shaft.

10. The movable jaw assembly of a jaw crusher according to claim 9, characterized in that: The depth of the threaded hole is 0.5 of the diameter of the hinge shaft.

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