Heating device for large bearing of mining machinery

Abstract

The invention provides a heating device for a large bearing of mining machinery, and relates to the field of mining machinery. The bottom end face of the mounting base is connected with four universal wheels in a rectangular array shape through bolts in a fastened mode. The rear part of the top end surface of the mounting base is fixedly connected with a hand-push frame; a heating cylinder is fixedly connected to the center of the top end surface of the mounting base; a guide sliding groove is formed in the lower portion of the heating cylinder. A guide sliding seat is slidably connected into the guide sliding groove. A heating disc is fixedly connected in the guide sliding seat; two observation openings are symmetrically formed in the outer part of the heating cylinder; a heat-insulating cover is arranged on the top end surface of the heating cylinder; two driving electric push rods are symmetrically connected to the top end face of the mounting base in a fastened mode through bolts. In the low-temperature environment, the heating disc automatically gets close to the bearing, the heat conduction efficiency is improved, in the high-temperature environment, the heating ring automatically resets and gets away from the bearing to avoid excessive heating, and the defects that a heating device is inconvenient to use in the complex environment, and the heating efficiency of the bearing is affected are overcome.

Description

Technical Field

[0001] This invention relates to the field of mining machinery technology, and in particular to a heating device for large bearings in mining machinery. Background Technology

[0002] When installing large bearings onto mining machinery, in order to meet the installation requirements of interference fit, workers usually heat the large bearings with a heating device before installation. This facilitates the achievement of a high-precision interference fit through thermal expansion and contraction. Existing heating devices typically consist of a mounting base, an electric push rod, a connecting frame, a support plate, a heating cylinder, and a heating plate.

[0003] For example, utility model application CN202020387912.X discloses a heating device for large bearings used in mining machinery, specifically including a base and a heating pot. The base has a groove containing an electric heating plate, which is placed on the heating plate. The bottom of the heating pot is in contact with the upper surface of the heating plate, and a temperature sensor is installed on the side wall of the heating pot. An electric cylinder is vertically mounted on each side of the heating pot on the base. The top of the electric cylinder's telescopic rod is connected to a Z-shaped plate, and the top of the electric cylinder's telescopic rod is connected to the lower end of the upper horizontal plate of the Z-shaped plate. Support plates are detachably placed on the lower horizontal plates of the two Z-shaped plates. A pusher is provided on one side of the base, and universal wheels with braking function are provided at the bottom of the base. This utility model can heat large bearings used in mining machinery and can be easily transported to the mining machinery's operating site for heating.

[0004] However, existing heating devices typically fix the heating plate inside the heating cylinder to ensure efficient heat transfer. However, mines are often located in mountainous or plateau environments with significant day-night temperature differences. This means that during the day when the ambient heat is high, the combined effect of the ambient heat and the continuous heating of the heating components can easily cause the bearing temperature to exceed the safe range. At night when the temperature is low, a large amount of the heat generated by the heating components is absorbed and lost by the cold air during the transfer to the bearing. This makes the use of the heating device in complex environments inconvenient and affects the heating efficiency of the bearing. Summary of the Invention

[0005] In view of this, the present invention provides a heating device for large bearings in mining machinery, which has a guide slide, a control spring, and a temperature-sensitive spring that can adjust the distance between the heating plate and the support seat in real time according to changes in ambient temperature. At normal temperature, the spring forces of the temperature-sensitive spring and the control spring are balanced, and the heating plate is in a stationary state. When the ambient temperature decreases, the temperature-sensitive spring gradually relaxes as the temperature decreases, and the tension of the control spring becomes greater than that of the temperature-sensitive spring. Under the action of the tension of the control spring, the heating plate moves closer to the support seat. When the ambient temperature increases, the temperature-sensitive spring gradually contracts as the temperature increases, and the tension of the temperature-sensitive spring becomes greater than that of the control spring. Under the action of the tension of the temperature-sensitive spring, the heating plate moves away from the support seat.

[0006] This invention provides a heating device for large bearings in mining machinery, comprising: a mounting base; four casters bolted in a rectangular array on the bottom surface of the mounting base; a pusher fixedly connected to the rear of the top surface of the mounting base; a heating cylinder fixedly connected to the center of the top surface of the mounting base; a guide groove provided at the bottom of the heating cylinder; a guide slide block slidably connected within the guide groove; a heating plate fixedly connected within the guide slide block; two observation ports symmetrically provided on the outside of the heating cylinder; a heat insulation cover provided on the top surface of the heating cylinder; two drive electric push rods symmetrically bolted to the top surface of the mounting base; a connecting frame fixedly connected to the output shaft of each of the two drive electric push rods; a support base provided between the two connecting frames; and the support base and the heating plate aligned.

[0007] Furthermore, a positioning retaining ring is fixedly connected to the top surface of the support base; multiple sets of disc springs are fixedly connected in a ring array inside the positioning retaining ring; a positioning block is fixedly connected to the other end of each set of disc springs; and each set of positioning blocks is an arc-shaped block structure.

[0008] Furthermore, a double-ended screw is rotatably connected to the lower part of each of the two connecting frames; the threads at both ends of the two double-ended screws are in opposite directions; a set of auxiliary sliding plates is symmetrically threaded to the outside of each of the two double-ended screws; a fixed sliding plate is fixedly connected to the upper end of each of the two sets of auxiliary sliding plates; and the two sets of fixed sliding plates are slidably connected to the two connecting frames respectively.

[0009] Furthermore, each of the two sets of fixed sliding plates is fixedly connected to a limiting seat at its end; each of the two sets of limiting seats is fixedly connected to a limiting rod on its exterior; the bottom end of the support base is symmetrically fixedly connected to two mounting brackets; the ends of the two connecting brackets are respectively inserted into the two mounting brackets; and the two sets of limiting seats are respectively inserted into the two mounting brackets.

[0010] Furthermore, a fixed handle is fixedly connected to the top surface of the heat preservation cover; two guide seats are symmetrically fixedly connected to the upper part of the fixed handle; a guide slider is slidably connected inside each of the two guide seats; a control slide plate is fixedly connected to the bottom surface of the two guide sliders; multiple sets of return springs are fixedly connected to the top surface of the control slide plate; the upper ends of the multiple sets of return springs are all fixedly connected to the outside of the fixed handle.

[0011] Furthermore, the control slide plate is externally symmetrically hinged to two control links; the other end of each of the two control links is hinged to a connecting slide rod; the top surface of the insulation cover is symmetrically fixed to two fixing blocks; the two connecting slide rods are slidably connected to the two fixing blocks respectively.

[0012] Furthermore, a sealing bracket is fixedly connected to the end of each of the two connecting slide rods away from the control link; the bottom end face of each of the two sealing brackets is provided with an inclined surface; the two sealing brackets are slidably connected in the two fixed blocks respectively; a set of connecting springs is fixedly connected to the inner side of each of the two sealing brackets; the other end of the two sets of connecting springs is fixedly connected in the two fixed blocks respectively; two sealing seats are symmetrically fixedly connected to the outside of the heating cylinder; the two sealing brackets are respectively engaged in the two sealing seats.

[0013] Furthermore, the bottom surface of the heat insulation cover has multiple sets of guide grooves arranged in a linear array; all sets of guide grooves are V-shaped groove structures; two auxiliary grooves are symmetrically arranged on the outside of the heat insulation cover; the two auxiliary grooves are respectively aligned with the positions of the two connecting brackets.

[0014] Furthermore, the top surface of the guide slide is fixedly connected to multiple sets of control springs in a circular array; the other ends of the multiple sets of control springs are all fixedly connected to the top surface of the guide slide groove; the bottom surface of the guide slide is fixedly connected to multiple sets of temperature-sensitive springs in a circular array; the other ends of the multiple sets of temperature-sensitive springs are all fixedly connected to the bottom surface of the guide slide groove; the outside of the guide slide is fixedly connected to multiple sets of auxiliary sliders in a circular array; multiple sets of auxiliary slide grooves are formed in a circular array inside the guide slide groove; the multiple sets of auxiliary sliders are slidably connected in the multiple sets of auxiliary slide grooves respectively.

[0015] Furthermore, two sets of control electric push rods are symmetrically bolted to the top surface of the mounting base; the output shafts of the two sets of control electric push rods extend through the mounting base to the bottom of the mounting base, and a connecting plate is fixedly connected to the output shafts of the two sets of control electric push rods; anti-slip pads are provided on the bottom surfaces of the two connecting plates. Beneficial effects

[0016] During use, at room temperature, the forces of the temperature-changing spring and the control spring are balanced, and the heating plate is stationary. As the ambient temperature decreases, the temperature-changing spring gradually relaxes, and the tension of the control spring becomes greater than that of the temperature-changing spring. Under the action of the tension of the control spring, the heating plate moves closer to the support. As the ambient temperature increases, the temperature-changing spring gradually contracts, and the tension of the temperature-changing spring becomes greater than that of the control spring. Under the action of the tension of the temperature-changing spring, the heating plate moves away from the support. In low-temperature environments, the heating plate automatically moves closer to the bearing, enhancing the efficiency of heat conduction and allowing heat to be precisely focused on the key parts of the bearing, quickly raising the oil temperature to the optimal lubrication state. In high-temperature environments, the heating plate automatically resets and moves away from the bearing to avoid overheating, forming a dynamic balance temperature regulation closed loop. This allows it to adapt to various environments and effectively improves the versatility of the heating device for large bearings in mining machinery.

[0017] By rotating the double-ended screw, the auxiliary slide plate moves the fixed slide plate, which in turn moves the limit seat inward. As the limit seat slides, the limit rod slowly disengages from the mounting bracket. Once the limit rod is completely disengaged from the mounting bracket, the limit on the support seat is released, allowing the support seat to be removed for replacement. This facilitates the selection of a suitable support seat based on the size of the bearing, effectively improving the practicality of the heating device for large bearings in mining machinery.

[0018] After heating is complete, the operator simply needs to hold the fixed handle. This gripping action will compress the control slide plate, which, under pressure, will cause the guide slider to slide within the guide seat. Subsequently, through a series of transmissions, the sealing bracket will move. As the sealing bracket moves, it will slowly detach from the sealing seat and compress the connecting spring. Once the sealing bracket is completely detached from the sealing seat, it will release the restriction on the insulation cover. At this point, the operator can lift the fixed handle to remove the insulation cover. The operation is simple and quick, effectively improving the convenience of the heating device for large bearings in mining machinery and making it more convenient to use. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0020] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0021] In the attached diagram: Figure 1 This is a schematic diagram of the isometric structure of the present invention.

[0022] Figure 2 This is a structural schematic diagram of the invention viewed from below.

[0023] Figure 3 This is an isometric structural diagram of the support base of the present invention.

[0024] Figure 4 This is an isometric structural diagram of the guide channel of the present invention.

[0025] Figure 5 This is a cross-sectional structural diagram of the fixed handle of the present invention.

[0026] Figure 6 This is the present invention. Figure 5 A magnified structural diagram at point A.

[0027] Figure 7 This is the present invention. Figure 5 A magnified structural diagram at point B.

[0028] Figure 8 This is a cross-sectional view of the heating cylinder of the present invention.

[0029] Figure 9 This is the present invention. Figure 8 A magnified structural diagram at point C.

[0030] Figure 10 This is the present invention. Figure 8 A magnified structural diagram at point D.

[0031] Figure 11 This is a cross-sectional structural schematic diagram of the connecting frame of the present invention.

[0032] Figure 12 This is the present invention. Figure 11 A magnified structural diagram at point E.

[0033] Figure 13 This is an isometric structural schematic diagram of the temperature-sensitive spring of the present invention.

[0034] List of reference numerals 1. Mounting base; 101. Casters; 102. Hand pusher; 103. Heating cylinder; 104. Observation port; 105. Control electric push rod; 106. Connecting plate; 107. Anti-slip pad; 108. Drive electric push rod; 109. Connecting frame; 110. Support base; 111. Positioning retaining ring; 112. Disc spring; 113. Positioning block; 114. Insulation cover; 115. Flow guide channel; 116. Auxiliary channel; 117. Fixed handle; 118. Fixed block; 119. Control slide plate; 120. Reset spring 121. Spring; 122. Guide seat; 123. Guide slider; 124. Control link; 125. Connecting slide rod; 126. Sealing bracket; 127. Connecting spring; 128. Sealing seat; 129. Guide slide; 130. Heating plate; 131. Auxiliary slide; 132. Auxiliary slider; 133. Control spring; 134. Temperature-sensitive spring; 135. Mounting bracket; 136. Double-ended screw; 137. Auxiliary slide plate; 138. Fixed slide plate; 139. Limit seat; 140. Limiting rod. Detailed Implementation Example

[0035] This invention provides a heating device for large bearings in mining machinery. Please refer to the following: Figures 1 to 13 As shown, it includes: mounting base 1; The bottom surface of the mounting base 1 is bolted with four universal wheels 101 in a rectangular array. A pusher bracket 102 is fixedly connected to the rear of the top surface of the mounting base 1. A heating cylinder 103 is fixedly connected to the center of the top surface of the mounting base 1. A guide groove 128 is provided at the bottom of the heating cylinder 103. A guide slide 129 is slidably connected in the guide groove 128. A heating plate 130 is fixedly connected in the guide slide 129. Two observation ports 104 are symmetrically provided on the outside of the heating cylinder 103. A heat preservation cover 114 is provided on the top surface of the heating cylinder 103. Two drive electric push rods 108 are symmetrically bolted to the top surface of the mounting base 1. A connecting bracket 109 is fixedly connected to the output shaft of each of the two drive electric push rods 108. A support base 110 is provided between the two connecting brackets 109. The support base 110 is aligned with the heating plate 130.

[0036] The top surface of the support base 110 is fixedly connected to a positioning retaining ring 111; multiple sets of disc springs 112 are fixedly connected in a ring array inside the positioning retaining ring 111; the other end of each set of disc springs 112 is fixedly connected to a positioning block 113; the multiple sets of positioning blocks 113 are all arc-shaped block structures.

[0037] Each of the two connecting frames 109 is rotatably connected to a double-ended screw 136 at its lower part; the threads at both ends of the two double-ended screws 136 are in opposite directions; the outer sides of the two double-ended screws 136 are symmetrically connected to a set of auxiliary sliding plates 137; the upper ends of the two sets of auxiliary sliding plates 137 are fixedly connected to fixed sliding plates 138; the two sets of fixed sliding plates 138 are slidably connected to the two connecting frames 109 respectively.

[0038] Among them, the ends of the two sets of fixed sliding plates 138 are fixedly connected to the limit seats 139; the outside of the two sets of limit seats 139 is fixedly connected to a set of limit rods 140; the bottom end of the support base 110 is symmetrically fixedly connected to two mounting brackets 135; the ends of the two connecting brackets 109 are respectively inserted into the two mounting brackets 135; the two sets of limit seats 139 are respectively inserted into the two mounting brackets 135.

[0039] The top surface of the heat insulation cover 114 is fixedly connected to a fixed handle 117; the upper part of the fixed handle 117 is symmetrically fixedly connected to two guide seats 121; a guide slider 122 is slidably connected inside each of the two guide seats 121; a control slide plate 119 is fixedly connected to the bottom surface of the two guide sliders 122; multiple sets of return springs 120 are fixedly connected to the top surface of the control slide plate 119; the upper ends of the multiple sets of return springs 120 are all fixedly connected to the outside of the fixed handle 117.

[0040] Among them, the control slide plate 119 is externally symmetrically hinged to two control links 123; the other end of each of the two control links 123 is hinged to a connecting slide rod 124; the top surface of the heat preservation cover 114 is symmetrically fixedly connected to two fixing blocks 118; the two connecting slide rods 124 are respectively slidably connected in the two fixing blocks 118.

[0041] Each of the two connecting slide rods 124 has a sealing bracket 125 fixedly connected to the end furthest from the control link; the bottom surface of each of the two sealing brackets 125 has an inclined surface; the two sealing brackets 125 are slidably connected to the two fixing blocks 118 respectively; a set of connecting springs 126 are fixedly connected to the inner side of each of the two sealing brackets 125; the other ends of the two sets of connecting springs 126 are fixedly connected to the two fixing blocks 118 respectively; two sealing seats 127 are symmetrically fixedly connected to the outside of the heating cylinder 103; the two sealing brackets 125 are respectively snapped into the two sealing seats 127.

[0042] The bottom surface of the heat insulation cover 114 has multiple sets of guide grooves 115 arranged in a linear array; the multiple sets of guide grooves 115 are all V-shaped groove structures; the outside of the heat insulation cover 114 has two auxiliary grooves 116 symmetrically arranged; the two auxiliary grooves 116 are respectively aligned with the positions of the two connecting brackets 109.

[0043] The top surface of the guide slide 129 is fixedly connected to multiple sets of control springs 133 in a ring array; the other end of each set of control springs 133 is fixedly connected to the top surface of the guide slide 128; the bottom surface of the guide slide 129 is fixedly connected to multiple sets of temperature-sensitive springs 134 in a ring array; the other end of each set of temperature-sensitive springs 134 is fixedly connected to the bottom surface of the guide slide 128; the outside of the guide slide 129 is fixedly connected to multiple sets of auxiliary sliders 132 in a ring array; multiple sets of auxiliary slides 131 are formed in a ring array inside the guide slide 128; the multiple sets of auxiliary sliders 132 are slidably connected to the multiple sets of auxiliary slides 131 respectively.

[0044] The specific usage and function of this embodiment: In this invention, when heating the large bearing of mining machinery, the large bearing is placed on the support base 110. The positioning retaining ring 111 and the positioning block 113 can position the large bearing, making the heating of the large bearing more uniform. Then, the drive electric push rod 108 is activated, causing the drive electric push rod 108 to move the connecting frame 109. As the connecting frame 109 moves, the support base 110 is placed into the heating cylinder 103. Then, the heating plate 130 is activated to heat the heating oil in the heating cylinder 103, thereby heating the large bearing. The universal wheels 101 and the hand push frame 102 make it convenient for the operator to move the heating device. The observation port 104 is used for observation. The design allows staff to easily observe the heating status of large bearings. Rotating the double-ended screw 136 moves the auxiliary slide plate 137, which in turn moves the fixed slide plate 138. During this movement, the fixed slide plate 138 causes the limiting seat 139 to slide inwards. This sliding motion causes the limiting rod 140 to slowly disengage from the mounting bracket 135. Once the limiting rod 140 is completely disengaged from the mounting bracket 135, the limiting on the support base 110 is released, allowing the support base 110 to be removed and replaced. This allows staff to select a suitable support base 110 based on the bearing size. The insulation cover 114 ensures... The heating oil in the heating cylinder 103 is heated to a higher temperature, allowing it to better heat the large bearing. After heating, the operator simply holds the fixed handle 117. This gripping action compresses the control slide plate 119, which, under pressure, causes the guide slider 122 to slide within the guide seat 121 and compress the return spring 120. The movement of the control slide plate 119 causes the control linkage 123 to swing. This swinging motion pulls the connecting slide rod 124 along the fixed block 118. The fixed block 118 provides guidance for the connecting slide rod 124, ensuring its stability. During the sliding of the connecting slide rod 124, the sealing bracket 125 is activated. As the sealing bracket 125 moves, it slowly detaches from the sealing seat 127 and presses against the connecting spring 126. Once the sealing bracket 125 is completely detached from the sealing seat 127, it releases the restriction on the insulation cover 114. At this point, the operator can lift the fixing handle 117 to remove the insulation cover 114. The auxiliary groove 116 prevents the position of the connecting bracket 109 from affecting the installation of the insulation cover 114 when sealing the heating cylinder 103. The guide groove 115 guides the condensate generated during heating, allowing it to flow out of the heating cylinder 103. The guide groove 115 has a 30° inclination angle. Under normal temperature conditions, the spring forces of the temperature-changing spring 134 and the control spring 133 are balanced.At this point, the heating plate 130 is stationary. When the ambient temperature decreases, the temperature-sensitive spring 134 gradually relaxes, and the tension of the control spring 133 becomes greater than that of the temperature-sensitive spring 134. Under the action of the tension of the control spring 133, the heating plate 130 moves closer to the support base 110. When the ambient temperature increases, the temperature-sensitive spring 134 gradually contracts, and the tension of the temperature-sensitive spring 134 becomes greater than that of the control spring 133. Under the action of the tension of the temperature-sensitive spring 134, the heating plate 130 moves away from the support base 110. During the movement of the heating plate 130, the auxiliary slide 131 and auxiliary slider 132 provide guidance. The temperature-sensitive spring 134 is made of shape memory alloy, and its elastic coefficient responds linearly to temperature changes. At room temperature, it is defined as 20±5℃. The temperature-sensitive spring relaxes below 10℃ and contracts above 30℃. Example

[0045] Based on Example 1, please refer to Figures 1 to 2 As shown, it includes: control electric actuators 105, connecting plates 106, and anti-slip pads 107. Two sets of control electric actuators 105 are symmetrically bolted to the top surface of the mounting base 1. The output shafts of the two sets of control electric actuators 105 extend through the mounting base 1 to the bottom of the mounting base 1. Each output shaft of the two sets of control electric actuators 105 is fixedly connected to a connecting plate 106. Anti-slip pads 107 are provided on the bottom surface of both connecting plates 106.

[0046] The specific usage and function of this embodiment: In this invention, after the heating device is moved to the designated position, the operator can activate the control electric push rod 105, which will drive the connecting plate 106 to move. As the connecting plate 106 moves, the anti-slip pad 107 will slowly come into contact with the ground. After the anti-slip pad 107 comes into contact with the ground, the friction between the anti-slip pad and the ground will increase, thereby increasing the stability of the heating device.

[0047] The following points should be noted in this article: 1. The accompanying drawings of this embodiment only involve the structures involved in this embodiment; other structures can refer to the general design.

[0048] 2. Where there is no conflict, this embodiment and the features in the embodiment can be combined with each other to obtain new embodiments.

[0049] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A heating device for large bearings in mining machinery, comprising: Mounting base (1); the bottom end face of the mounting base (1) is bolted with four universal wheels (101) in a rectangular array; a pusher (102) is fixedly connected to the rear of the top surface of the mounting base (1); characterized in that a heating cylinder (103) is fixedly connected to the center of the top surface of the mounting base (1); a guide groove (128) is provided at the lower part of the heating cylinder (103); a guide slide (129) is slidably connected in the guide groove (128); a heating plate is fixedly connected in the guide slide (129). (130); Two observation ports (104) are symmetrically opened on the outside of the heating cylinder (103); A heat preservation cover (114) is provided on the top surface of the heating cylinder (103); Two drive electric push rods (108) are symmetrically bolted to the top surface of the mounting base (1); A connecting frame (109) is fixedly connected to the output shaft of each of the two drive electric push rods (108); A support seat (110) is provided between the two connecting frames (109); The position of the support seat (110) is aligned with that of the heating plate (130).

2. The heating device for large bearings in mining machinery as described in claim 1, characterized in that: The top surface of the support base (110) is fixedly connected to a positioning retaining ring (111); multiple sets of disc springs (112) are fixedly connected in a ring array inside the positioning retaining ring (111); the other end of each set of disc springs (112) is fixedly connected to a positioning block (113); the multiple sets of positioning blocks (113) are all arc-shaped block structures.

3. The heating device for large bearings in mining machinery as described in claim 1, characterized in that: The lower part of each of the two connecting frames (109) is rotatably connected to a double-ended screw (136); the threads at both ends of the two double-ended screws (136) are opposite in direction; the outer sides of the two double-ended screws (136) are symmetrically connected to a set of auxiliary sliding plates (137); the upper ends of the two sets of auxiliary sliding plates (137) are fixedly connected to fixed sliding plates (138); the two sets of fixed sliding plates (138) are slidably connected to the two connecting frames (109).

4. The heating device for large bearings in mining machinery as described in claim 3, characterized in that: The ends of both sets of fixed sliding plates (138) are fixedly connected to limit seats (139); a set of limit rods (140) are fixedly connected to the outside of both sets of limit seats (139); two mounting brackets (135) are symmetrically fixedly connected to the bottom end of the support base (110); the ends of the two connecting brackets (109) are respectively inserted into the two mounting brackets (135); the two sets of limit seats (139) are respectively inserted into the two mounting brackets (135).

5. The heating device for large bearings in mining machinery as described in claim 1, characterized in that: The top surface of the heat insulation cover (114) is fixedly connected to a fixed handle (117); the upper part of the fixed handle (117) is symmetrically fixedly connected to two guide seats (121); a guide slider (122) is slidably connected inside each of the two guide seats (121); a control slide plate (119) is fixedly connected to the bottom surface of the two guide sliders (122); multiple sets of return springs (120) are fixedly connected to the top surface of the control slide plate (119); the upper ends of the multiple sets of return springs (120) are all fixedly connected to the outside of the fixed handle (117).

6. The heating device for large bearings in mining machinery as described in claim 5, characterized in that: The control slide (119) is externally symmetrically hinged to two control links (123); the other end of each of the two control links (123) is hinged to a connecting slide (124); the top surface of the heat insulation cover (114) is symmetrically fixedly connected to two fixing blocks (118); the two connecting slides (124) are respectively connected to sliding connections within the two fixing blocks (118).

7. The heating device for large bearings in mining machinery as described in claim 6, characterized in that: A sealing bracket (125) is fixedly connected to one end of each of the two connecting slide rods (124) away from the control link (123); the bottom end face of each of the two sealing brackets (125) is provided with an inclined surface; the two sealing brackets (125) are slidably connected in the two fixed blocks (118); a set of connecting springs (126) is fixedly connected to the inner side of each of the two sealing brackets (125); the other end of the two sets of connecting springs (126) is fixedly connected in the two fixed blocks (118); two sealing seats (127) are symmetrically fixedly connected to the outside of the heating cylinder (103); the two sealing brackets (125) are respectively snapped into the two sealing seats (127).

8. The heating device for large bearings in mining machinery as described in claim 1, characterized in that: The bottom surface of the heat insulation cover (114) has multiple sets of guide grooves (115) arranged in a linear array; the multiple sets of guide grooves (115) are all V-shaped groove structures; the outside of the heat insulation cover (114) has two auxiliary grooves (116) symmetrically arranged; the two auxiliary grooves (116) are respectively aligned with the positions of the two connecting brackets (109).

9. The heating device for large bearings in mining machinery as described in claim 1, characterized in that: The top surface of the guide slide (129) is fixedly connected to multiple sets of control springs (133) in a ring array; the other end of each set of control springs (133) is fixedly connected to the top surface of the guide slide (128); the bottom surface of the guide slide (129) is fixedly connected to multiple sets of temperature-sensitive springs (134) in a ring array; the other end of each set of temperature-sensitive springs (134) is fixedly connected to the bottom surface of the guide slide (128); the outside of the guide slide (129) is fixedly connected to multiple sets of auxiliary sliders (132) in a ring array; multiple sets of auxiliary slides (131) are opened in a ring array inside the guide slide (128); the multiple sets of auxiliary sliders (132) are slidably connected in the multiple sets of auxiliary slides (131).

10. The heating device for large bearings in mining machinery as described in claim 1, characterized in that: The top surface of the mounting base (1) is symmetrically bolted with two sets of control electric push rods (105); the output shafts of the two sets of control electric push rods (105) extend through the mounting base (1) to the bottom of the mounting base (1), and the output shafts of the two sets of control electric push rods (105) are fixedly connected to a connecting plate (106); the bottom surfaces of the two connecting plates (106) are provided with anti-slip pads (107).

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