A surface grinding device for leaf spring

Abstract

The present invention relates to the field of leaf spring processing, and in particular provides a leaf spring surface grinding device, including: a frame, a grinding device, which is arranged on the frame, including a rotatable skeleton and a grinding belt, the skeleton is in an elliptical barrel shape, and the skeleton is arranged horizontally along its axial direction; the outer wall surface of the skeleton is wavy, and the grinding belt is adsorbed on the skeleton and fits with the outer wall surface of the skeleton; wherein the grinding belt is also configured to be rotatable relative to the skeleton to exchange the peaks and troughs formed when the grinding belt is adsorbed on the skeleton; a transport device is arranged on the frame and is located below the grinding device. The scheme of the present invention, by arranging a grinding belt that can rotate relative to the skeleton, allows the peaks and troughs on the grinding belt to be interchangeable. During the grinding process, when encountering the problem of excessive local pressure on the grinding belt, the peaks and troughs of the grinding belt are promptly exchanged, thereby ensuring the subsequent grinding quality.

Description

Technical Field

[0001] The invention relates to the field of leaf spring processing, in particular to a leaf spring surface grinding device. Background Art

[0002] During the production process, after high temperature treatment, a decarburized layer will form on the surface of the leaf spring, which will affect the subsequent service life of the product, so the decarburized layer needs to be polished. Since the surface of the polished part is not uniform, the existing belt grinder will cause excessive local polishing pressure when the polishing surface is too undulating, resulting in damage to the polishing belt surface, which in turn affects the subsequent polishing quality.

[0003] In addition, when grinding leaf springs, the existing belt grinder not only generates a large amount of friction heat, causing the grinding surface to deform due to heat, but also the grinding chips generated during the grinding process splash, resulting in residual grinding chips on the grinding surface, thereby affecting the grinding quality of the leaf spring. Summary of the invention

[0004] One purpose of the present invention is to solve the problem of surface damage of the grinding belt when the local pressure is too large, so as to ensure the grinding quality.

[0005] Another object of the present invention is to improve the heat dissipation efficiency and the discharge efficiency of grinding chips during the grinding process, thereby improving the grinding quality.

[0006] In particular, the present invention provides a surface grinding device for a leaf spring, comprising: a frame, a grinding device, which is arranged on the frame, and comprises a rotatable skeleton and a grinding belt, wherein the skeleton is in the shape of an elliptical barrel and is horizontally arranged along its axial direction; the outer wall surface of the skeleton is wavy, and the grinding belt is adsorbed on the skeleton and fits with the outer wall surface of the skeleton; wherein the grinding belt is also configured to be rotatable relative to the skeleton to exchange the peak and trough areas formed when the grinding belt is adsorbed on the skeleton; a transport device, which is arranged on the frame and is located below the grinding device.

[0007] Furthermore, an annular cavity is formed on the skeleton, and an adsorption port is provided at each trough of the outer wall of the skeleton, and each adsorption port is communicated with the annular cavity. At least one air vent is also formed on the inner wall of the skeleton, and at least one air vent is communicated with the annular cavity, and a pressure valve is provided on each air vent; each pressure valve is configured to close the air vent when negative pressure is formed in the annular cavity; after the annular cavity is evacuated through the air vent to form a negative pressure, the grinding belt is adsorbed on the outer wall of the skeleton, forming a wave shape that fits the outer wall of the skeleton.

[0008] Furthermore, the grinding device includes: a shell, which is horizontally arranged above the frame, and the four corners of the shell extend downward in the vertical direction to form a rotating support, and the four rotating supports are symmetrically distributed on both sides of the frame; a driving motor is arranged on the shell; a transmission rod is arranged inside the frame, and the two ends of the transmission rod are rotatably arranged on two opposite rotating supports; a belt is mounted on the driving motor and the transmission rod, and the rotation of the driving motor drives the transmission rod to rotate, and the transmission rod drives the frame to rotate.

[0009] Furthermore, the grinding device also includes: a rotating sleeve, which is sleeved on a transmission rod, and the transmission rod drives the rotating sleeve to rotate, and when the rotating sleeve rotates, the frame is driven to rotate; the rotating sleeve includes a barrel-shaped inner ring, and an outer ring formed by extending outward from one end of the inner ring for a distance and then extending toward the other end along the axial direction of the rotating sleeve; the outer ring includes a first annular surface connected to the inner ring, and a second annular surface spaced apart from the first annular surface, at least two baffles are formed between the first annular surface and the second annular surface, and at least two baffles connect the first annular surface and the second annular surface; a fixed sleeve, which is sleeved on the inner ring of the rotating sleeve, and the fixed sleeve has a notch formed on the wall surface close to the frame in the horizontal direction; wherein at least two adjacent baffles are flush with the edge of the notch on the fixed sleeve.

[0010] Furthermore, one end of the fixed sleeve wheel extends outward in the radial direction of the fixed sleeve wheel to form a fixed plate; a sensing cavity is formed at each wave crest of the outer wall of the skeleton, and the sensing cavity is in the shape of a long strip, extending from one side of the skeleton to the other side; a sensing rod is provided at the opening of each sensing cavity, and each sensing rod partially extends into the sensing cavity to close the sensing cavity; the polishing device also includes: a sensor, which is provided on the fixed plate and is opposite to the sensing rod located under the skeleton; when the wave crest of the outer wall of the skeleton is squeezed, the pressure in the sensing cavity increases, the sensing rod protrudes outward, and presses against the sensor to trigger the sensor.

[0011] Furthermore, the grinding device also includes: an adjusting component, which is arranged above the grinding belt, and the adjusting component is configured to drive the grinding belt to rotate relative to the frame after the sensor is triggered.

[0012] Furthermore, the adjustment component includes: an adjustment motor, which is arranged on the shell; an adjustment wheel, which is connected to the adjustment motor and rotates under the drive of the adjustment motor; the adjustment wheel is configured to drive the grinding belt to rotate relative to the frame when it contacts the grinding belt.

[0013] Furthermore, a cooling cavity is formed on the side of the skeleton opposite to the sensing rod, and the cooling cavity extends outward from one side of the skeleton in a radial direction, and the cooling cavity is filled with coolant; a plurality of spray holes are formed at intervals on the side wall of the cooling cavity facing the skeleton; when the cooling cavity is squeezed, the coolant in the cooling cavity is sprayed toward the grinding belt through the plurality of spray holes.

[0014] Furthermore, the grinding device also includes: a sleeve rod, which is sleeved on the transmission rod and located in the rotating sleeve wheel; a pressure plate extending outward is formed at one end of the sleeve rod close to the cooling chamber, and the pressure plate presses against the side wall of the cooling chamber away from the frame; a piston plate is formed at one end of the sleeve rod away from the cooling chamber, and the piston plate is in close contact with the rotating sleeve wheel and the transmission rod; a limit plate is also provided at one end of the transmission rod away from the cooling chamber, and the limit plate rests on an adjacent rotating support; an oil chamber is formed between the transmission rod and the rotating sleeve wheel, the limit plate and the piston plate; a control oil channel is formed at one end of the transmission rod away from the cooling chamber, and the control oil channel is formed from the end face of the transmission rod to extend inwardly for a distance and then to extend outwardly along the radial direction of the transmission rod, and the control oil channel is connected to the oil chamber; when the liquid in the oil chamber is extracted through the control oil channel, the piston plate moves along the transmission rod to the end away from the cooling chamber, driving the pressure plate to squeeze the cooling chamber.

[0015] Furthermore, the transport device includes: a transport motor, a transport wheel connected to the transport motor; a transport belt mounted on the transport wheel and rotated by the transport wheel; and limit strips are arranged at intervals on the transport belt to fix the leaf spring to be polished.

[0016] The beneficial effects of the present invention are:

[0017] The surface grinding device of the leaf spring of the present invention sets the outer wall surface of the frame of the grinding device into a wave shape, and adsorbs the grinding belt on the outer wall surface of the frame so that the grinding belt forms a corresponding wave shape, so that during the grinding process, only the wave crest area on the grinding belt is ground. The grinding belt is configured to be rotatable relative to the frame so that the wave crest and wave trough areas on the grinding belt can be interchanged. During the grinding process, when the problem of excessive local pressure of the grinding belt is encountered, the wave crest and wave trough areas of the grinding belt can be replaced in time, so as to ensure the subsequent grinding quality.

[0018] Furthermore, the surface grinding equipment of the leaf spring of the present invention arranges a sensing chamber and a sensing rod in the wave peak area of ​​the skeleton, utilizes the characteristics of the sensing chamber being compressed and contracted to squeeze the sensing rod, and then triggers the sensor, so as to timely detect the abnormal state of excessive local pressure during the grinding process, thereby timely replacing the grinding area of ​​the grinding belt, thereby improving the grinding quality.

[0019] Furthermore, the surface grinding device of the leaf spring of the present invention provides a cooling chamber filled with coolant on one side of the frame, so that the coolant is sprayed toward the grinding belt during the grinding process, thereby improving the heat dissipation efficiency of the grinding belt and reducing the risk of heat deformation of the grinding surface. Due to the special wavy design of the outer wall surface of the frame, the coolant will gather in the trough area of ​​the frame and stay for a long time, which not only further improves the heat dissipation efficiency of the grinding belt, but also has the effect of discharging the grinding chips. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. In the accompanying drawings:

[0021] Figure 1 It is a structural schematic diagram of a leaf spring surface grinding device according to an embodiment of the present invention;

[0022] Figure 2 for Figure 1 Schematic enlarged view of region A;

[0023] Figure 3 A schematic cross-sectional view of a leaf spring surface grinding device according to an embodiment of the present invention;

[0024] Figure 4 for Figure 3 Schematic enlargement of region B;

[0025] Figure 5 A schematic structural diagram of a skeleton of a leaf spring surface grinding device according to an embodiment of the present invention;

[0026] Figure 6 for Figure 5 Schematic enlargement of region C;

[0027] Figure 7 This is a schematic structural diagram of a frame of a leaf spring surface grinding device according to an embodiment of the present invention from another angle; in order to better illustrate the internal structure of the frame, part of the frame structure is cut away;

[0028] Figure 8 It is a structural schematic diagram of a grinding device of a leaf spring surface grinding device according to an embodiment of the present invention;

[0029] Fig. 9 An exploded schematic diagram of a grinding device of a leaf spring surface grinding device according to an embodiment of the present invention;

[0030] Fig.10 The present invention is a schematic cross-sectional view of a grinding device of a leaf spring surface grinding device according to an embodiment of the present invention.

[0031] Among them: 100, frame; 110, hydraulic cylinder; 200, grinding device; 300, frame; 310, annular cavity; 311, suction port; 312, vent; 313, pressure valve; 320 sensing cavity; 330, cooling cavity; 331, spray hole; 340, sealing cavity; 400, shell; 410, rotating support; 420, driving motor; 430, transmission rod; 431, limit plate; 432, baffle; 433, control oil channel; 440, belt; 450, rotating sleeve; 451, inner ring; 452, outer ring; 453, outer ring; 454, outer ring; 455, inner ring; 456, outer ring; 457, inner ring; 458, outer ring; 459, inner ring; 460, inner ring; 461, inner ring; 462, outer ring; 463, inner ring; 464, outer ring; 465, inner ring; 466, inner ring; 467, outer ring; 468, inner ring; 469, inner ring; 470, inner ring; 471, inner ring; 472, outer ring; 473, inner ring; 474, inner ring; 475, inner ring; 476, outer ring; 477, inner ring; 478, inner ring; 479, inner ring; 480, inner ring; 481, inner ring; 482, outer ring; 483, inner ring; 484, inner ring; 485, inner ring; 486, inner ring; 487, inner ring; 488, inner ring; 489, inner ring; 490, inner ring; 501, inner ring; 502, inner ring; 503, inner 21. First annular surface; 4522. Second annular surface; 4523. Baffle bar; 460. Fixed sleeve wheel; 461. Notch; 462. Fixed plate; 470. Sleeve rod; 471. Pressure plate; 472. Piston plate; 480. Oil chamber; 490. Support shaft; 500. Sensor; 510. Sensor rod; 600. Grinding belt; 700. Adjustment assembly; 710. Adjustment motor; 720. Adjustment wheel; 730. Telescopic rod; 800. Transport device; 810. Transport motor; 820. Transport wheel; 830. Transport belt; 831. Limiting bar. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] The "connection" mentioned in the present invention includes direct and indirect connection unless otherwise specified. In the description of the present invention, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "radial", "axial" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0034] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] Refer to the following Figures 1 to 10To describe a leaf spring surface grinding device provided by the present invention.

[0036] Figure 1 It is a schematic structural diagram of a leaf spring surface grinding device according to an embodiment of the present invention. Figure 2 for Figure 1 Schematic enlargement of area A in the middle. Figure 3 It is a schematic cross-sectional view of a leaf spring surface grinding device according to an embodiment of the present invention. Figure 4 for Figure 3 Schematic enlargement of region B.

[0037] like Figure 1-4 As shown, this embodiment first provides a leaf spring surface grinding device, which generally may include: a frame 100 , a grinding device 200 and a transportation device 800 .

[0038] The grinding device 200 is arranged on the frame 100, and the grinding device 200 can generally include a rotatable frame 300 and a grinding belt 600. The frame 300 is in an elliptical barrel shape, and the frame 300 is arranged horizontally along its axial direction. The outer wall surface of the frame 300 is wavy, and the grinding belt 600 is adsorbed on the frame 300 and fits the outer wall surface of the frame 300. The grinding belt 600 is also configured to be rotatable relative to the frame 300 to exchange the peak and trough areas formed when the grinding belt 600 is adsorbed on the frame 300. The transport device 800 is arranged on the frame 100 and is located below the grinding device 200.

[0039] The solution of this embodiment is to set the outer wall surface of the frame 300 of the grinding device 200 to be wavy, and adsorb the grinding belt 600 on the outer wall surface of the frame 300, so that the grinding belt 600 forms a corresponding wavy shape, so that during the grinding process, only the peak area on the grinding belt 600 is ground. The grinding belt 600 is configured to be rotatable relative to the frame 300, so that the peak and trough areas on the grinding belt 600 can be interchanged. During the grinding process, when the problem of excessive local pressure on the grinding belt 600 is encountered, the peak and trough areas of the grinding belt 600 can be replaced in time, so as to ensure the subsequent grinding quality.

[0040] In some preferred embodiments, the skeleton 300 can be made of a rubber material, which is a belt-like structure that is surrounded by a barrel shape. It not only has high wear resistance and tensile strength, but also has excellent oil resistance, antistatic properties and corrosion resistance. In other embodiments, the skeleton 300 can also be made of other materials with properties similar to rubber. In some embodiments, the frame 100 can be a whole, and the grinding device 200 and the transport device 800 are both installed on the frame 100, so that the surface grinding equipment of the leaf spring becomes an integrated device. In other embodiments, the frame 100 can include several combinable parts, and the grinding device 200 and the transport device 800 can be installed on one of the parts respectively.

[0041] Figure 5 It is a schematic structural diagram of a skeleton 300 of a leaf spring surface grinding device according to an embodiment of the present invention. Figure 6 for Figure 5 Schematic enlargement of area C in the middle. Figure 7 This is a schematic structural diagram from another angle of the skeleton 300 of the surface grinding device for a leaf spring according to an embodiment of the present invention; in order to better illustrate the internal structure of the skeleton 300, part of the structure of the skeleton 300 is cut away.

[0042] like Figure 5-7 As shown, an annular cavity 310 is formed on the skeleton 300, and a suction port 311 is provided at each trough of the outer wall of the skeleton 300, and each suction port 311 is communicated with the annular cavity 310. At least one vent hole 312 is also formed on the inner wall of the skeleton 300, and at least one vent hole 312 is communicated with the annular cavity 310, and a pressure valve 313 is provided on each vent hole 312. Each pressure valve 313 is configured to close the vent hole 312 when negative pressure is formed in the annular cavity 310. After the annular cavity 310 is evacuated through the vent hole 312 to form a negative pressure, the grinding belt 600 is adsorbed on the outer wall of the skeleton 300, forming a wave shape that fits the outer wall of the skeleton 300.

[0043] The solution of this embodiment is to set an annular cavity 310, a suction port 311 and a vent 312 on the skeleton 300, and use the vent 312 to extract the gas in the annular cavity 310, so that the annular cavity 310 forms a negative pressure state, so that the grinding belt 600 is tightly adsorbed on the outer wall surface of the skeleton 300 through the suction port 311. Not only is the structure sophisticated, but also the installation is easy.

[0044] By setting a pressure valve 313 at the vent hole 312 and configuring the pressure valve 313 to close the vent hole 312 when negative pressure is formed in the annular cavity 310, the air tightness of the annular cavity 310 is ensured after the negative pressure is formed, thereby ensuring the stability of the negative pressure state in the annular cavity 310, so that the grinding belt 600 can be firmly adsorbed on the outer wall surface of the skeleton 300, thereby ensuring the grinding effect of the leaf spring surface grinding equipment.

[0045] By providing a suction port 311 at each trough of the outer wall of the frame 300, multiple suction ports 311 are used to act on the grinding belt 600 simultaneously, thereby improving the installation stability of the grinding belt 600 and ensuring the grinding effect of the leaf spring surface grinding equipment.

[0046] In some preferred embodiments, the adsorption port 311 is configured as a long rectangular through hole along the axial direction of the frame 300 , so as to better adsorb the grinding belt 600 .

[0047] In some preferred embodiments, a plurality of vents 312 may be provided on the inner wall surface of the skeleton 300, and a pressure valve 313 is provided in each vent 312. By evacuating the annular cavity 310 simultaneously through the plurality of vents 312, the evacuation time can be reduced and the efficiency of forming a negative pressure state in the annular cavity 310 can be improved.

[0048] Figure 8 It is a structural schematic diagram of a grinding device 200 of a leaf spring surface grinding equipment according to an embodiment of the present invention. Fig. 9 It is an exploded schematic diagram of a grinding device 200 of a leaf spring surface grinding equipment according to an embodiment of the present invention. Fig.10 This is a schematic cross-sectional view of a grinding device 200 of a leaf spring surface grinding device according to an embodiment of the present invention. Fig. 9 The middle grinding belt 600 and the frame 300 are in an assembled state to better illustrate the state in which the grinding belt 600 is adsorbed on the frame 300 .

[0049] like Figure 8-10 As shown, the grinding device 200 may generally further include: a housing 400 , a driving motor 420 , a transmission rod 430 and a belt 440 .

[0050] The housing 400 is horizontally arranged above the frame 300, and the four corners of the housing 400 extend downward in the vertical direction to form rotating supports 410, and the four rotating supports 410 are symmetrically distributed on both sides of the frame 300. The driving motor 420 is arranged on the housing 400. The transmission rod 430 is arranged inside the frame 300, and the two ends of the transmission rod 430 are rotatably arranged on two opposite rotating supports 410. The belt 440 is sleeved on the driving motor 420 and the transmission rod 430, and the driving motor 420 rotates to drive the transmission rod 430 to rotate, and the transmission rod 430 drives the frame 300 to rotate.

[0051] In the solution of this embodiment, by setting a shell 400 above the frame 300, the grinding chips thrown upward by the grinding belt 600 when working can be effectively blocked. By setting a rotating support 410 at each of the four corners of the shell 400, the rotating supports 410 are opposite to each other at both ends of the frame 300, and the transmission rod 430 is set at one end inside the frame 300, and the two ends of the transmission rod 430 are respectively penetrated on two opposite rotating brackets, so that the transmission rod 430 supports and transmits the frame 300. By setting a driving motor 420 and a belt 440, the transmission rod 430 is driven to rotate, and then the frame 300 is driven to rotate.

[0052] like Fig. 9 As shown, the frame 300 is generally provided with a support shaft 490, and the support shaft 490 and the transmission rod 430 are respectively provided at both ends of the frame 300 to jointly support the frame 300. The support shaft 490 can be driven by the frame 300 to rotate together, thereby reducing the relative friction between the support shaft 490 and the frame 300, so that the frame 300 rotates more smoothly.

[0053] The grinding device 200 may generally further include a rotating sleeve wheel 450 and a fixed sleeve wheel 460 .

[0054] The rotating sleeve 450 is sleeved on the transmission rod 430, and the transmission rod 430 drives the rotating sleeve 450 to rotate, and when the rotating sleeve 450 rotates, the frame 300 is driven to rotate. The rotating sleeve 450 includes a cylindrical inner ring 451, and an outer ring 452 formed by extending outward from one end of the inner ring 451 for a distance and then extending to the other end along the axial direction of the rotating sleeve 450. The outer ring 452 includes a first annular surface 4521 connected to the inner ring 451, and a second annular surface 4522 spaced apart from the first annular surface 4521, at least two blocking bars 4523 are formed between the first annular surface 4521 and the second annular surface 4522, and at least two blocking bars 4523 connect the first annular surface 4521 and the second annular surface 4522. The fixed sleeve 460 is sleeved on the inner ring 451 of the rotating sleeve 450, and a notch 461 is formed on the wall of the fixed sleeve 460 close to the frame 300 in the horizontal direction. At least two adjacent blocking bars 4523 are flush with the edge of the notch 461 on the fixed sleeve 460 .

[0055] The solution of this embodiment is to sleeve a rotating sleeve 450 on the transmission rod 430, so that the transmission rod 430 drives the rotating sleeve 450 to rotate, and then drives the frame 300 to rotate. In some embodiments, the transmission rod 430 and the rotating sleeve 450, as well as the rotating sleeve 450 and the frame 300 can be connected by a key to achieve transmission. In other embodiments, the transmission rod 430, the rotating sleeve 450 and the frame 300 can be clamped together, or the transmission rod 430, the rotating sleeve 450 and the frame 300 can be relatively fixed together by other connecting parts with a fixing function, so that when the transmission rod 430 rotates, the rotating sleeve 450 and the frame 300 are driven to rotate.

[0056] In the solution of this embodiment, a rotating sleeve 450 having an inner ring 451 and an outer ring 452 is sleeved on the transmission rod 430, and a fixed sleeve 460 is sleeved between the inner ring 451 and the outer ring 452 of the rotating sleeve 450. By utilizing the cooperation among the rotating sleeve 450, the fixed sleeve 460, the transmission rod 430 and the frame 300, after the rotating sleeve 450 rotates to a certain angle, the vent 312 on the frame 300 is connected with the notch 461 on the fixed sleeve 460, and the two adjacent blocking bars 4523 on the rotating sleeve 450 can be flush with the edges of the notch 461 on the fixed sleeve 460, so that a sealed cavity 340 is formed between the rotating sleeve 450, the fixed sleeve 460, the transmission rod 430 and the frame 300. And the vent 312 on the frame 300 is connected with the sealed cavity 340.

[0057] In the solution of this embodiment, a vent pipe can also be provided on the fixed sleeve wheel 460, one end of which is connected to the sealed cavity 340, and the other end is connected to the air pump. When the air pump performs the exhaust operation, the gas in the sealed cavity 340 is firstly extracted, and at this time, a pressure difference is formed between the sealed cavity 340 and the annular cavity 310 (the air pressure in the annular cavity 310 is greater than the air pressure in the sealed cavity 340), and the pressure valve 313 at the vent hole 312 is opened. The gas in the annular cavity 310 enters the sealed cavity 340 through the vent hole 312, and then is extracted by the air pump after passing through the sealed cavity 340 and the exhaust pipe. As the air pump continues to exhaust, the air pressure in the annular cavity 310 gradually decreases, and the air pressure outside the skeleton 300 is greater than the air pressure in the annular cavity 310, so the grinding belt 600 is tightly attached to the outer wall surface of the skeleton 300 through the suction port 311. The grinding belt 600, the frame 300, the transmission rod 430, the fixed sleeve wheel 460 and the rotating sleeve wheel 450 together form a relatively sealed space. When the negative pressure in the annular cavity 310 reaches a certain level, the air pump stops pumping air. The frame 300 starts to rotate, and the vent hole 312 separates from the sealed cavity 340 and begins to contact the external air pressure. Due to the pressure difference between the external air pressure and the negative pressure state in the annular cavity 310 (the external air pressure is greater than the air pressure in the annular cavity 310), the pressure valve 313 automatically closes.

[0058] In some embodiments, the air pump may evacuate the annular cavity 310 once at a preset time interval to further improve the stability of the negative pressure state in the annular cavity 310 .

[0059] In other embodiments, a micro air pump may be provided at the notch 461 of the fixed sleeve 460. After the vent hole 312 on the skeleton 300 is rotated to be opposite to the micro air pump, the micro air pump may be connected to the vent hole 312 and directly draw air through the vent hole 312, so that the annular cavity 310 of the skeleton 300 forms a negative pressure state.

[0060] One end of the fixed sleeve 460 extends outwardly in the radial direction of the fixed sleeve 460 to form a fixed plate 462. A sensing cavity 320 is formed at each crest of the outer wall of the frame 300. The sensing cavity 320 is in the shape of a long strip and extends from one side of the frame 300 to the other side. A sensing rod 510 is provided at the opening of each sensing cavity 320, and each sensing rod 510 partially extends into the sensing cavity 320 to close the sensing cavity 320.

[0061] The grinding device 200 may also generally include: a sensor 500, which is disposed on the fixing plate 462 and is opposite to the sensing rod 510 located below the frame 300. When the wave crest of the outer wall of the frame 300 is squeezed, the pressure in the sensing cavity 320 increases, and the sensing rod 510 protrudes outward and presses against the sensor 500 to trigger the sensor 500.

[0062] The solution of this embodiment is to set a sensing chamber 320 at each wave crest of the skeleton 300, so that when the local pressure of the grinding belt 600 at any place on the skeleton 300 is too large (that is, when a harder area appears on the surface of the workpiece to be polished or when there are large fluctuations on the surface to be polished), the sensing chamber 320 in contact with it will push the sensing rod 510 to move outward under the action of pressure, thereby triggering the sensor 500 to warn, thereby realizing accurate detection of excessive local pressure on the grinding belt 600.

[0063] The grinding device 200 may generally further include: an adjustment component 700 disposed above the grinding belt 600 , and the adjustment component 700 is configured to drive the grinding belt 600 to rotate relative to the frame 300 after the sensor 500 is triggered.

[0064] In the solution of this embodiment, the adjustment component 700 is arranged above the grinding belt 600, so as to realize the function of driving the grinding belt 600 to rotate relative to the frame 300 without interfering with the grinding work of the grinding belt 600 located below, thereby improving the rationality of the spatial distribution between the components of the grinding device 200.

[0065] The leaf spring surface grinding device may also generally include a hydraulic cylinder 110, which is disposed above the grinding device 200, one end of which is connected to the frame 100, and the other end of which is connected to the housing 400 of the grinding device 200. The hydraulic cylinder 110 is configured to drive the grinding device 200 to move upward (i.e., away from the leaf spring to be ground) after the sensor 500 is triggered.

[0066] After the grinding device 200 is no longer in contact with the leaf spring to be ground (i.e., the sensor 500 is no longer in a triggered state), the air pump inputs gas into the annular cavity 310 to release the negative pressure state of the annular cavity 310. The grinding belt 600 is no longer tightly attached to the outer wall surface of the frame 300, and the adjustment component 700 drives the grinding belt 600 to rotate, so that the relative position of the grinding belt 600 and the frame 300 changes. The air pump re-evacuates air to form a negative pressure state in the annular cavity 310 again, and the grinding belt 600 is adsorbed on the outer wall surface of the frame 300 again. At this time, the peak and trough areas formed by the grinding belt 600 have been swapped compared to before.

[0067] The adjustment assembly 700 may generally include an adjustment motor 710 and an adjustment wheel 720 .

[0068] The adjusting motor 710 is disposed on the housing 400. The adjusting wheel 720 is connected to the adjusting motor 710 and rotates driven by the adjusting motor 710. The adjusting wheel 720 is configured to drive the grinding belt 600 to rotate relative to the frame 300 when in contact with the grinding belt 600.

[0069] The solution of this embodiment makes the regional exchange of the grinding belt 600 independently controllable by providing an independent adjustment motor 710. The adjustment motor 710 drives the adjustment wheel 720 to rotate, so that when the adjustment wheel 720 and the grinding belt 600 are in contact, the friction between the adjustment wheel 720 and the grinding belt 600 drives the grinding belt 600 to rotate relative to the frame 300, so as to achieve the exchange of the peak area and the trough area on the grinding belt 600, thereby improving the grinding effect of the leaf spring surface grinding device and ensuring the grinding quality of the leaf spring surface grinding device.

[0070] In some embodiments, the adjustment assembly 700 may further include a telescopic rod 730. The two ends of the telescopic rod 730 are respectively connected to the housing 400 and the adjustment wheel 720. The telescopic rod 730 can be telescoped in the vertical direction to drive the adjustment wheel 720 to move up and down, thereby changing the contact state between the adjustment wheel 720 and the grinding belt 600.

[0071] A cooling cavity 330 is formed on one side of the frame 300 opposite to the sensing rod 510. The cooling cavity 330 extends radially outward from one side of the frame 300, and is filled with coolant. A plurality of liquid spray holes 331 are formed at intervals on the side wall of the cooling cavity 330 facing the frame 300. When the cooling cavity 330 is squeezed, the coolant in the cooling cavity 330 is sprayed toward the grinding belt 600 through the plurality of liquid spray holes 331.

[0072] In the solution of this embodiment, by setting a cooling cavity 330 on the side of the frame 300 opposite to the sensing rod 510 , interference with the sensor 500 is avoided while ensuring the cooling effect, thereby ensuring the sensing accuracy of the sensor 500 .

[0073] It is understandable that the connecting surface between the two side walls of the cooling cavity 330 is preferably set as an elastic surface so that the cooling cavity 330 can be squeezed and deformed to spray out the cooling liquid. The cooling cavity 330 can also be provided with a liquid infusion tube for conveying the cooling liquid into the cooling cavity 330.

[0074] The solution of this embodiment, by providing a cooling chamber 330, allows the coolant to be sprayed toward the grinding belt 600 during the grinding process, thereby improving the heat dissipation efficiency of the grinding belt 600 and reducing the risk of thermal deformation of the grinding surface. Due to the special wavy setting of the outer wall of the skeleton 300, the coolant will gather in the trough area of ​​the skeleton 300 and stay for a long time, which not only further improves the heat dissipation efficiency of the grinding belt 600, but also utilizes the discharge of grinding chips, improves the discharge efficiency of grinding chips, and thus improves the grinding quality of the surface grinding equipment of the leaf spring.

[0075] In addition, the cooling cavity 330 is formed by extending outward in the radial direction from one side of the skeleton 300, that is, the side wall of the cooling cavity 330 is perpendicular to the axial direction of the skeleton 300, and the coolant is sprayed in a direction parallel to the outer wall surface of the skeleton 300, thereby increasing the spray range of the coolant and improving the heat dissipation effect of the grinding belt 600.

[0076] Furthermore, the solution of this embodiment provides a plurality of spray holes 331 arranged at intervals, so that the spraying of the coolant is more comprehensive and uniform, thereby improving the heat dissipation effect of the grinding belt 600.

[0077] In some preferred embodiments, the liquid spray holes 331 may be disposed corresponding to the troughs of the skeleton 300 , thereby increasing the residence time of the coolant on the polishing belt 600 and further improving the heat dissipation effect.

[0078] The grinding device 200 may generally further include: a sleeve rod 470, which is sleeved on the transmission rod 430 and located in the rotating sleeve wheel 450. An outwardly extending pressing plate 471 is formed at one end of the sleeve rod 470 close to the cooling chamber 330, and the pressing plate 471 presses against the side wall of the cooling chamber 330 away from the frame 300. A piston plate 472 is formed at one end of the sleeve rod 470 away from the cooling chamber 330, and the piston plate 472 is in close contact with the rotating sleeve wheel 450 and the transmission rod 430. A limit plate 431 is also provided at one end of the transmission rod 430 away from the cooling chamber 330, and the limit plate 431 abuts against an adjacent rotating support 410. An oil chamber 480 is formed between the transmission rod 430, the rotating sleeve wheel 450, the limit plate 431 and the piston plate 472. A control oil passage 433 is formed at one end of the transmission rod 430 away from the cooling chamber 330. The control oil passage 433 is formed by extending inwardly from the end surface of the transmission rod 430 for a distance and then extending outwardly in the radial direction of the transmission rod 430. The control oil passage 433 is communicated with the oil chamber 480. When the liquid in the oil chamber 480 is drawn out through the control oil passage 433, the piston plate 472 moves along the transmission rod 430 toward the end away from the cooling chamber 330, driving the pressure plate 471 to squeeze the cooling chamber 330.

[0079] In the solution of this embodiment, an oil pump may generally be provided, which is connected to the control oil passage 433 and is used to extract oil from the oil chamber 480 or input oil into the oil chamber 480 .

[0080] The solution of this embodiment is to set a sleeve rod 470, utilize the sleeve rod 470, the transmission rod 430 and the rotating sleeve wheel 450 to form an oil chamber 480, and utilize the control oil channel 433 on the transmission rod 430 to extract the liquid in the oil chamber 480, thereby driving the sleeve rod 470 to move, and then squeezing the cooling chamber 330 to spray out the coolant, which effectively increases the spray range of the coolant, thereby further improving the heat dissipation effect.

[0081] In some preferred embodiments, the support shaft 490 may be composed of several parts, and the structures of each part may be respectively consistent with the structures of the transmission rod 430, the rotating sleeve 450, the fixed sleeve 460, and the sleeve rod 470. That is, a chamber with the same structure as the sealed chamber 340 may be formed in the support shaft 490, and this chamber may be connected to the annular cavity 310. When the air pump is working, the sealed chamber 340 and the chamber with the same structure as the sealed chamber 340 in the support shaft 490 may be connected at the same time, thereby improving the air extraction / inflation efficiency of the annular cavity 310.

[0082] In addition, a chamber with the same structure as the oil chamber 480 is also formed in the supporting shaft. When the oil pump is working, the oil chamber 480 and the chamber in the supporting shaft 490 with a similar structure to the oil chamber 480 can be connected at the same time. The oil pump is used to extract the oil in the oil chamber 480 and the supporting shaft 490, thereby driving the pressure plate 471 and the same components in the supporting shaft 490 to squeeze the cooling chamber at the same time, thereby improving the spraying efficiency of the cooling chamber 330.

[0083] A baffle 432 may be generally provided at one end of the transmission rod 430 close to the cooling chamber 330. The baffle 432 and the limit plate 431 work together to ensure that the transmission rod 430 is disposed between the two rotating supports 410 and does not move along its axial direction, thereby ensuring its structural stability.

[0084] In some preferred embodiments, the limiting plate 431 is detachably disposed on the transmission rod 430. After the rotating sleeve 450, the fixed sleeve 460, the sleeve rod 470 and the rotating support 410 are assembled together, the limiting plate 431 is then installed on the transmission rod 430.

[0085] In some preferred embodiments, the oil pump can be configured to pump out and input oil alternately and repeatedly, so that the cooling chamber 330 reciprocates in the process of compression-rebound-compression, and then continuously sprays out coolant, further improving the heat dissipation efficiency.

[0086] The transport device 800 may generally include: a transport motor 810 , transport wheels 820 and a transport belt 830 .

[0087] The transport wheel 820 is connected to the transport motor 810. The transport belt 830 is sleeved on the transport wheel 820 and rotates under the drive of the transport wheel 820. The transport belt 830 is provided with limit bars 831 at intervals for fixing the leaf spring to be polished.

[0088] In the solution of this embodiment, by arranging limiting bars 831 at intervals on the conveyor belt 830, the leaf spring to be polished is clamped between two adjacent limiting bars 831, thereby improving the transportation stability of the leaf spring to be polished.

[0089] In some preferred embodiments, the conveyor belt 830 and the limiting strip 831 may be integrally formed.

[0090] The specific working process of a leaf spring surface grinding device provided by the present invention is described in combination with the above embodiments:

[0091] Before starting the grinding, the annular cavity 310 on the frame 300 is evacuated through the vent hole 312 to form a negative pressure state, and the grinding belt 600 is adsorbed on the frame 300 and presents a wavy shape.

[0092] The leaf spring to be polished is placed between two adjacent limit bars 831 of the conveyor belt 830. The conveyor motor 810 is started, driving the conveyor belt 830 to rotate, thereby driving the leaf spring to be polished to move in the horizontal direction and approach the polishing device 200. As the conveyor motor 810 is started, the drive motor 420 starts to start, and drives the transmission rod 430 to rotate by the belt 440, thereby driving the rotating sleeve 450 to rotate, and then driving the frame 300 and the polishing belt 600 adsorbed on the frame 300 to rotate. The leaf spring to be polished gradually approaches the polishing device 200, and the peak area on the polishing belt 600 begins to contact the leaf spring and polish it.

[0093] During the grinding process, when the local pressure of the grinding belt 600 is too large (when the grinding belt 600 encounters a harder area on the leaf spring), the corresponding induction cavity 320 is squeezed, and the induction rod 510 moves outward and triggers the sensor 500. After the sensor 500 is triggered, the transport motor 810 and the drive motor 420 stop running. The grinding device 200 moves upward, and at the same time, the annular cavity 310 is inflated through the vent hole 312, thereby releasing the negative pressure state, and the grinding belt 600 is no longer tightly attached to the frame 300. The adjustment motor 710 is started, and the adjustment wheel 720 contacts the grinding belt 600 and drives the grinding belt 600 to rotate relative to the frame 300, so that the previous peak area and trough area of ​​the grinding belt 600 are exchanged. The annular cavity 310 is evacuated again to form a negative pressure state, and the grinding belt 600 is adsorbed on the frame 300 again. At this time, the damaged area on the grinding belt 600 that may be caused by excessive local pressure has been exchanged. The grinding device 200 moves downward, and the transport motor 810 and the drive motor 420 restart to continue grinding the leaf spring.

[0094] In addition, during the grinding process, the oil in the oil chamber 480 is pumped out through the control oil passage 433, thereby driving the sleeve rod 470 to move. As the sleeve rod 470 moves, the pressure plate 471 squeezes the cooling chamber 330, so that the coolant in the cooling chamber 330 is sprayed from the spray hole 331 to the grinding belt 600, thereby improving the heat dissipation efficiency of the grinding area.

[0095] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0096] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A leaf spring surface grinding device, characterized in that: include: frame, The grinding device is arranged on the frame, and comprises a rotatable frame and a grinding belt, wherein the frame is in an elliptical barrel shape and is arranged horizontally along its axial direction; the outer wall surface of the frame is wavy, and the grinding belt is adsorbed on the frame and fits with the outer wall surface of the frame; wherein, The grinding belt is also configured to rotate relative to the frame to exchange the peak and valley areas formed when the grinding belt is adsorbed on the frame; A transport device, arranged on the frame and located below the grinding device; A shell is horizontally arranged above the frame, and four corners of the shell extend downward in a vertical direction to form rotating supports, and the four rotating supports are symmetrically distributed on both sides of the frame; A transmission rod is arranged inside the frame, and two ends of the transmission rod are rotatably arranged on two opposite rotating supports; A rotating sleeve is sleeved on the transmission rod, and the transmission rod drives the rotating sleeve to rotate, and the rotating sleeve drives the frame to rotate when rotating; the rotating sleeve includes an inner ring in a cylindrical shape; A fixed sleeve wheel, sleeved on the inner ring of the rotating sleeve wheel; One end of the fixed sleeve wheel extends outwardly in the radial direction of the fixed sleeve wheel to form a fixed plate; A sensing cavity is formed at each wave crest of the outer wall of the frame, and the sensing cavity is in a strip shape and extends from one side of the frame to the other side; a sensing rod is provided at the opening of each sensing cavity, and each sensing rod partially extends into the sensing cavity to close the sensing cavity; The polishing device further includes: a sensor, which is disposed on the fixing plate and is opposite to the sensing rod located below the frame; When the wave crests on the outer wall of the frame are squeezed, the pressure in the sensing cavity increases, and the sensing rod protrudes outward and presses against the sensor to trigger the sensor.

2. The surface grinding equipment for leaf springs according to claim 1, characterized in that: An annular cavity is formed on the skeleton, and an adsorption port is provided at each trough of the outer wall of the skeleton, and each of the adsorption ports is communicated with the annular cavity. At least one vent hole is also formed on the inner wall of the skeleton, and at least one of the vent holes is communicated with the annular cavity, and each of the vent holes is provided with a pressure valve; Each of the pressure valves is configured to close the vent hole when negative pressure is formed in the annular cavity; After the annular cavity is evacuated through the vent hole to form a negative pressure, the grinding belt is adsorbed on the outer wall surface of the skeleton to form a wavy shape that fits the outer wall surface of the skeleton.

3. The surface grinding equipment for leaf springs according to claim 1, characterized in that: The grinding device also includes: A driving motor is arranged on the housing; The belt is sleeved on the driving motor and the transmission rod. The driving motor rotates to drive the transmission rod to rotate, and the transmission rod drives the frame to rotate.

4. The surface grinding equipment for leaf springs according to claim 3, characterized in that: The rotating sleeve also includes an outer ring formed by extending outward from one end of the inner ring for a distance and then extending toward the other end along the axial direction of the rotating sleeve; the outer ring includes a first annular surface connected to the inner ring, and a second annular surface spaced apart from the first annular surface, at least two baffles are formed between the first annular surface and the second annular surface, and at least two baffles connect the first annular surface and the second annular surface; The fixed sleeve wheel is formed with a notch on the wall surface close to the frame in the horizontal direction; wherein, At least two adjacent blocking strips are flush with the edge of the notch on the fixed sleeve wheel.

5. The surface grinding equipment for leaf springs according to claim 1, characterized in that: The grinding device also includes: The adjusting component is disposed above the grinding belt, and the adjusting component is configured to drive the grinding belt to rotate relative to the frame after the sensor is triggered.

6. The surface grinding equipment for leaf springs according to claim 5, characterized in that: The adjustment component comprises: An adjusting motor is arranged on the housing; An adjusting wheel, connected to the adjusting motor and driven to rotate by the adjusting motor; The adjusting wheel is configured to drive the grinding belt to rotate relative to the frame when in contact with the grinding belt.

7. The surface grinding equipment for leaf springs according to claim 1, characterized in that: A cooling cavity is formed on one side of the frame opposite to the sensing rod, the cooling cavity is formed by extending outward from one side of the frame in a radial direction, and the cooling cavity is filled with a coolant; A plurality of liquid spray holes are formed at intervals on the side wall of the cooling cavity facing the frame; When the cooling cavity is squeezed, the coolant in the cooling cavity is sprayed toward the polishing belt through the plurality of spray holes.

8. The surface grinding equipment for leaf springs according to claim 7, characterized in that: The grinding device also includes: A sleeve rod is sleeved on the transmission rod and is located in the rotating sleeve wheel; a pressing plate extending outward is formed at one end of the sleeve rod close to the cooling chamber, and the pressing plate presses against the side wall of the cooling chamber away from the frame; a piston plate is formed at one end of the sleeve rod away from the cooling chamber, and the piston plate is in close contact with the rotating sleeve wheel and the transmission rod; A limit plate is also provided at one end of the transmission rod away from the cooling chamber, and the limit plate abuts against an adjacent rotating support; an oil chamber is formed between the transmission rod and the rotating sleeve, the limit plate and the piston plate; A control oil passage is formed at one end of the transmission rod away from the cooling chamber, the control oil passage is formed by being recessed inwardly extending from the end surface of the transmission rod for a distance and then recessed outwardly extending in the radial direction of the transmission rod, and the control oil passage is communicated with the oil chamber; When the liquid in the oil chamber is pumped out through the control oil passage, the piston plate moves along the transmission rod toward the end away from the cooling chamber, driving the pressure plate to squeeze the cooling chamber.

9. The surface grinding equipment for leaf springs according to claim 1, characterized in that: The transport device comprises: Transport motors, A transport wheel connected to the transport motor; A conveyor belt, which is sleeved on the conveyor wheel and rotates under the drive of the conveyor wheel; Limiting strips are arranged at intervals on the conveyor belt to fix the leaf spring to be polished.

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