Electrode contact stamping device for PTC heater

Abstract

The invention relates to the technical field of stamping equipment, in particular to an electrode contact stamping device for a PTC heater, which comprises a bedplate and a door frame, an air cylinder is mounted on the upper side of the door frame, two stamping heads are fixed at the telescopic end of the air cylinder, and the electrode contact stamping device further comprises a positioning and pushing mechanism for sleeving an electrode contact on the outer side of an electrode plate before stamping; the bearing table is arranged on the upper side of the table plate, and a centering positioning mechanism for positioning the heater is arranged between the punching head and the air cylinder. By means of the positioning propelling mechanism in linkage with the telescopic end of the air cylinder, the heater electrode plate can stretch into the inner side of the electrode contact by the equal depth in each time of punching, and therefore it is guaranteed that when each electrode contact is punched, the electrode contact can be fixed to the same position on the heater electrode plate, and the punching efficiency is improved. And the firmness of the stamped electrode contact is improved, the stability of current transmission is improved, the quality consistency of heater production is improved, and the product quality is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of stamping equipment, in particular to an electrode connector stamping device for a PTC heater. Background Art

[0002] PTC heating element, also known as PTC heater, is composed of PTC ceramic heating element and aluminum tube. It is an automatic constant temperature and energy-saving electric heater.

[0003] When a PTC heater is produced, it is necessary to install fixed electrode connectors on the outside of its positive and negative electrode sheets to facilitate connecting the wires to the electrode connectors when the user uses it, thereby connecting the wires to the electrode sheets.

[0004] After searching, the Chinese patent with publication number CN213105442U discloses a PTC heater electrode connector stamping device, including a punching machine, a vertically movable punching head and a punching base are provided on the punching machine, the punching head is located above the base, a bottom plate is provided on the punching base, a top plate is provided between the bottom plate and the punching head, a number of vertical guide columns are provided between the bottom plate and the top plate, the guide columns pass through the top plate, the top plate and the guide columns are slidably connected, a compression spring is provided on the guide column, a first clamping head is provided on the top plate, a second clamping head corresponding to the first clamping head is provided on the bottom plate, the first clamping head is located above the second clamping head, a clamping area is formed between the first clamping head and the second clamping head, the punching head can quickly press the pressing sheet onto the electrode sheet, and the clamping force of the pressing sheet after clamping is large, and it is not easy to loosen the electrode connector.

[0005] Based on the above search and combined with actual problems, it was found that: the stamping device can stamp the electrode connector, causing the electrode connector to deform so that it can be tightly wrapped around the outside of the electrode sheet of the heater, thereby achieving the fixation of the electrode connector and the electrode sheet. However, in actual operation, it is necessary to manually put the electrode connector on the outside of the electrode sheet of the heater. This step makes it difficult to ensure that each electrode connector can be put on the same position on the outside of the electrode sheet. In mass production, the position of the electrode connector on the outside of each heater is inconsistent, affecting the firmness of the electrode connector, affecting the stable transmission of current, and reducing the product production quality. Summary of the Invention

[0006] The object of the present invention is to provide an electrode connector stamping device for a PTC heater to solve the problems raised in the above background technology.

[0007] The technical solution of the present invention is: a device for punching electrode connectors for PTC heaters, comprising a table and a gantry, a cylinder being installed on the upper side of the gantry, two punching heads being fixed to the telescopic end of the cylinder, and further comprising: a positioning and pushing mechanism for sleeve-mounting the electrode connector on the outer side of the electrode sheet before punching; a bearing platform being arranged on the upper side of the table, a protruding end being arranged at one end of the upper side of the bearing platform, a centering and positioning mechanism for positioning the heater being arranged between the punching head and the cylinder; the positioning and pushing mechanism comprising a cross bar 1 fixed to one side of the telescopic end of the cylinder and a sliding frame slidably arranged above the table, a guide groove plate being fixed to the lower side of the cross bar 1, a guide groove 1 and a guide groove 2 being respectively provided inside the guide groove plate, one end of the inner side of the sliding frame being rotatably connected to two rotating shafts 1, and two sliding rods being slidably inserted at the other end of the inner side of the sliding frame, a splint being fixed to the outer side of the two rotating shafts 1, two rotating shafts 2 being rotatably connected between the two sliding rods, and a push plate for squeezing one end of the splint being fixed on one side of the two rotating shafts 2.

[0008] Preferably, the guide groove 1 includes a second oblique groove and a second vertical groove provided on the guide groove plate, and the second oblique groove and the second vertical groove are smoothly connected. The guide groove 2 includes a locking groove, a first oblique groove, and a first vertical groove provided on the guide groove plate. The two ends of the first oblique groove are smoothly connected to the locking groove and the first vertical groove respectively, the second vertical groove and the first vertical groove are aligned with each other, the second oblique groove and the first oblique groove are parallel to each other, and a sliding pin 2 is provided between the two sliding rods, and the sliding pin 2 is slidably adapted to the inner side of the guide groove 1. A sliding pin 1 is provided at one end of the sliding frame, and the sliding pin 1 is slidably adapted to the inner side of the guide groove 2.

[0009] Preferably, two guide blocks are fixed on both sides of the sliding frame, two transverse guide rods are fixed on the upper side of the table, and the two guide blocks are respectively slidably sleeved on the outer sides of the two transverse guide rods.

[0010] Preferably, one end of each of the two clamping plates is connected to a first torsion spring sleeved on an outer side of the rotating shaft, and one end of each of the two first torsion springs is connected to an inner side of the sliding frame.

[0011] Preferably, a gear is fixed to one outer end of each of the two rotating shafts, and the two gears are meshed with each other through teeth.

[0012] Preferably, a partition is fixed between the two slide rods at one end near the splint, two spring sheets are symmetrically provided on both sides of the partition, and one side of the two push plates is elastically connected to the partition through the spring sheets.

[0013] Preferably, a limit baffle is fixed on the inner side of the sliding frame at a position between the two clamping plates.

[0014] Preferably, a lower guide rod is fixed to the lower end of the guide groove plate, and the lower guide rod is inserted into the interior of the table for sliding, and an upper guide rod is fixed to the upper side of the cross bar 1 and is inserted into the interior of the door frame for sliding.

[0015] Preferably, the centering positioning mechanism includes a cross bar 2 fixed on one side of the telescopic end of the cylinder, two side rotating shafts rotatably connected to both sides of the supporting platform, and two rotating shaft frames fixed at both ends of the lower side of the supporting platform, a central rotating shaft is rotatably connected between the two rotating shaft frames, two rotating rods are symmetrically fixed on both sides of the central rotating shaft, one end of the two rotating rods is rotatably connected to a second connecting rod, two positioning clamps are fixed at both ends of the outer sides of the two side rotating shafts, a connecting rod is fixed between the two positioning clamps located on the same side, one end of the two second connecting rods is respectively rotatably connected to the outer sides of the two connecting rods, and one end of the outer side of the central rotating shaft is rotatably connected to a pressure rod, and one end of the pressure rod is rotatably connected to one end of the cross bar 2 through the first connecting rod.

[0016] Preferably, a connecting ring is fixed to one end of the outer side of the central rotating shaft, one end of the connecting ring is connected to a second torsion spring, and one end of the second torsion spring is connected to one side of the pressure rod.

[0017] The present invention provides an improved electrode connector punching device for a PTC heater, which has the following improvements and advantages compared to the prior art: First: The present invention drives the two punching heads downward by the telescopic end of the cylinder to punch the electrode connector and the electrode sheet of the heater, thereby punching the electrode connector to the outside of the electrode sheet. Before the punching head contacts the electrode connector, the positioning and pushing mechanism linked with the telescopic end of the cylinder can first clamp the electrode connector, and then push the electrode connector so that the electrode connector is sleeved on the outside of the electrode sheet of the heater, and finally the punching head contacts the electrode connector. Therefore, each time the punching is performed, the heater electrode sheet can be extended into the inner side of the electrode connector to an equal depth, thereby ensuring that the electrode connector can be fixed at the same position on the heater electrode sheet when each electrode connector is punched, thereby improving the firmness of the electrode connector after punching, improving the stability of current transmission, and improving the quality consistency of heater production, thereby improving product quality.

[0018] Secondly: The present invention can position the heater at the center line position on the upper side of the supporting platform and fix the position of the heater through the centering positioning mechanism, thereby preventing the electrode sheets of the heater from being offset or rotated when being punched by the punching head, so that the electrode joint can be completely wrapped around the outside of the two electrode sheets of the heater, thereby improving the stamping tightness between the two and the contact area between the two, effectively preventing the two from loosening, and further improving the production quality of the heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 Schematic diagram of the structure of the centering and positioning mechanism of the present invention; Figure 3 It is a structural schematic diagram of the positioning propulsion mechanism in the present invention; Figure 4 This is a schematic diagram of a first cross-sectional structure of the sliding frame of the present invention; Figure 5 This is a second cross-sectional structural diagram of the sliding frame of the present invention; Figure 6 This is a third cross-sectional structural diagram of the sliding frame of the present invention; Figure 7 This is a schematic structural diagram of the present invention in a stamping state; Figure 8 For the present invention Figure 7 Schematic diagram of the enlarged structure at point A in the middle.

[0021] Reference numerals: 1. Tabletop; 2. Door frame; 3. Cylinder; 4. Punch head; 5. Loading platform; 101. Sliding frame; 102. Crossbar 1; 103. Guide plate; 104. Rotating shaft 1; 105. Clamping plate; 106. Sliding rod; 107. Partition plate; 108. Rotating shaft 2; 109. Push plate; 110. Sliding pin 1; 111. Sliding pin 2; 112. Locking groove; 113. First inclined groove; 114. First vertical groove; 115. Second inclined groove; 116. Second vertical groove; 117. Lower guide rod ; 118. Upper guide rod; 119. First torsion spring; 120. Gear; 121. Limit baffle; 122. Spring piece; 123. Guide block; 124. Cross guide rod; 201. Cross rod two; 202. First connecting rod; 203. Rotating shaft frame; 204. Center rotating shaft; 205. Side rotating shaft; 206. Positioning clamp; 207. Connecting rod; 208. Rotating rod; 209. Second connecting rod; 210. Pressure rod; 211. Second torsion spring; 212. Connecting ring. DETAILED DESCRIPTION

[0022] The present invention is described in detail below, clearly and completely describing the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] The present invention provides an improved electrode connector punching device for a PTC heater. The technical solution of the present invention is: like Figures 1 to 8 As shown, an embodiment of the present invention provides an electrode connector stamping device for a PTC heater, comprising a table 1 and a door frame 2, a cylinder 3 being mounted on the upper side of the door frame 2, two punching heads 4 being fixed to the telescopic end of the cylinder 3, and further comprising: a positioning and pushing mechanism for sleeve-mounting the electrode connector on the outer side of the electrode sheet before stamping; a bearing platform 5 being arranged on the upper side of the table 1, a protruding end being arranged at one end of the upper side of the bearing platform 5, a centering and positioning mechanism for positioning the heater being arranged between the punching head 4 and the cylinder 3; the positioning and pushing mechanism comprising a cross bar 102 fixed to one side of the telescopic end of the cylinder 3 and a sliding frame 101 slidingly arranged above the table 1, a guide groove plate 103 being fixed to the lower side of the cross bar 102, a guide groove 1 and a guide groove 2 being respectively provided inside the guide groove plate 103, and an inner end of the sliding frame 101 being rotatably connected to two rotating shafts 104 (such as Figure 4 As shown), two slide bars 106 are slidably inserted at the other end of the inner side of the sliding frame 101, and two splints 105 are fixed to the outer sides of the two rotating shafts 104. Two rotating shafts 108 are rotatably connected between the two slide bars 106. One side of the two rotating shafts 108 is fixed with a push plate 109 for squeezing one end of the splint 105. Two guide blocks 123 are fixed on both sides of the sliding frame 101, and two cross guide rods 124 are fixed on the upper side of the table 1. The two guide blocks 123 are respectively slidably sleeved on the outer sides of the two cross guide rods 124; The guide groove 1 includes a second oblique groove 115 and a second vertical groove 116 provided on the guide groove plate 103, and the second oblique groove 115 and the second vertical groove 116 are smoothly connected. The guide groove 2 includes a locking groove 112, a first oblique groove 113, and a first vertical groove 114 provided on the guide groove plate 103. The two ends of the first oblique groove 113 are smoothly connected to the locking groove 112 and the first vertical groove 114 respectively. The second vertical groove 116 and the first vertical groove 114 are aligned. The second oblique groove 115 and the first oblique groove 113 are parallel to each other. A second sliding pin 111 is provided between the two sliding rods 106. The second sliding pin 111 is slidably adapted to the inner side of the guide groove 1. A sliding pin 110 is provided at one end of the sliding frame 101. The sliding pin 110 is slidably adapted to the inner side of the guide groove 2. When the guide groove plate 103 drives the second inclined groove 115 to move downward, it can apply a horizontal thrust to the second sliding pin 111, thereby pushing the two clamping plates 105 to merge and clamp the two sides of the electrode connector. When the guide groove plate 103 drives the first inclined groove 113 to move downward, it can apply a horizontal thrust to the first sliding pin 110, thereby pushing the sliding frame 101 and the two clamping plates 105 to move as a whole toward the heater position, thereby achieving the effect of sleeveing ​​the electrode connector on the outside of the electrode sheet, so that the electrode connector can be sleeved on the same position outside the heater electrode sheet every time, thereby improving product production quality.

[0024] Furthermore, one end of each of the two clamping plates 105 is connected to a first torsion spring 119 sleeved on the outside of the rotating shaft 104, and one end of each of the two first torsion springs 119 is connected to the inner side of the sliding frame 101; After the stamping is completed, the telescopic end of the cylinder 3 retracts and drives the guide groove plate 103 to move upward, so that the sliding pin 110 and the sliding pin 2 111 slide back to the inner side of the locking groove 112 and the second inclined groove 115, thereby driving the two push plates 109 to separate from one end of the two clamping plates 105. At this time, under the elastic force of the two first torsion springs 119, the two merged clamping plates 105 are separated, thereby releasing the clamping of the electrode connector.

[0025] Furthermore, a gear 120 is fixed to one end of the outer side of each of the two rotating shafts 104, and the two gears 120 are meshed with each other through teeth; Under the action of the two gears 120, the two rotating shafts 104 can be rotated in opposite directions by equal angles, thereby causing the two clamping plates 105 to rotate in opposite directions by equal angles. Therefore, the two clamping plates 105 can apply clamping force from the upper and lower sides of the electrode connector at the same time, preventing the electrode sheet of the heater from bending due to uneven clamping force, which reduces the firmness of the electrode connector after being stamped on the outside of the electrode sheet.

[0026] Furthermore, a partition 107 is fixed between the two slide bars 106 at one end near the clamping plate 105. Two spring pieces 122 are symmetrically provided on both sides of the partition 107. One side of each push plate 109 is elastically connected to the partition 107 through the spring piece 122. The push plate 109 and the partition 107 are elastically connected by the spring piece 122. When one end of the two clamping plates 105 is clamped on both sides of the electrode connector, if the partition 107 continues to drive the two push plates 109 to squeeze the two clamping plates 105, the two spring pieces 122 will be deformed. Therefore, the two push plates 109 and the two rotating shafts 108 can be rotated a certain angle toward the direction close to the partition 107, thereby avoiding further merging of the two clamping plates 105, thereby preventing the clamping plates 105 from deforming the electrode connector.

[0027] Furthermore, a limit stopper 121 is fixed on the inner side of the sliding frame 101 between the two clamping plates 105; When the electrode connector is placed on the outside of the heater electrode sheet before stamping, the ends of the two electrode connectors are pressed against one side of the limit baffle 121, so that the electrode connector can be pre-positioned and the two electrode connectors can be aligned, so that the two electrode sheets of the heater can be inserted into the same depth inside the two electrode connectors, further improving the consistency of the heater production quality and improving product quality.

[0028] Furthermore, a lower guide rod 117 is fixed to the lower end of the guide groove plate 103, and the lower guide rod 117 is inserted into the interior of the table 1 through sliding, and an upper guide rod 118 is fixed to the upper side of the cross bar 102 and inserted into the interior of the door frame 2 through sliding; Through the sliding cooperation between the lower guide rod 117 and the table 1, and through the sliding cooperation between the upper guide rod 118 and the door frame 2, the guide groove plate 103 can keep moving vertically up and down, thereby accurately driving the sliding pin 110 and the sliding pin 2 111 to move in steps and successively, and the electrode connector is placed on the outside of the heater electrode plate.

[0029] Furthermore, the centering and positioning mechanism includes a crossbar 201 fixed to one side of the telescopic end of the cylinder 3, two side shafts 205 rotatably connected to both sides of the carrier platform 5, and two shaft frames 203 fixed to both ends of the lower side of the carrier platform 5. A central shaft 204 is rotatably connected between the two shaft frames 203. Two rotating rods 208 are symmetrically fixed on both sides of the central shaft 204. One end of each rotating rod 208 is rotatably connected to a second connecting rod 209. Two positioning claws 206 are fixed to both ends of the outer sides of the two side shafts 205. A connecting rod 207 is fixed between the two positioning clamps 206 on the same side. One end of the two second connecting rods 209 is rotatably connected to the outer sides of the two connecting rods 207 respectively. A pressure rod 210 is rotatably connected to the outer end of the central rotating shaft 204. One end of the pressure rod 210 is rotatably connected to one end of the second cross bar 201 through the first connecting rod 202. A connecting ring 212 is fixed to the outer end of the central rotating shaft 204. One end of the connecting ring 212 is connected to a second torsion spring 211. One end of the second torsion spring 211 is connected to one side of the pressure rod 210. Through the centering positioning mechanism, the heater can be positioned at the center line position on the upper side of the supporting platform 5, and the position of the heater can be fixed, so as to avoid the electrode sheet of the heater from being offset or rotated when being punched by the punching head 4, so that the electrode joint can be completely wrapped around the outside of the two electrode sheets of the heater, thereby improving the stamping tightness between the two and the contact area between the two, which can effectively avoid the two from loosening and further improve the production quality of the heater.

[0030] Working principle: When using, place the PTC heater body on the upper side of the carrier 5, and press one end of the heater against the raised end of one end of the carrier 5, and then respectively put the two electrode connectors on the outside of the two electrode sheets of the heater, as shown in the figure. Figure 1 As shown, the two electrode connectors are placed between the two clamping plates 105; During stamping, the telescopic end of the control cylinder 3 is extended to drive the two punching heads 4 to move downward. At the same time, the telescopic end of the cylinder 3 will also drive the cross bar 201 of the centering positioning mechanism to move downward. The cross bar 201 drives the upper end of the first connecting rod 202 to move vertically downward, thereby causing the first connecting rod 202 to rotate. The lower end of the first connecting rod 202 presses one end of the pressure rod 210 downward. Since the pressure rod 210 is elastically connected to the connecting ring 212 through the second torsion spring 211, the pressure rod 210 is also connected to the centering positioning mechanism through the second torsion spring 211. The central rotating shaft 204 is elastically connected, and the pressure rod 210 transmits the rotational torque to the central rotating shaft 204 through the second torsion spring 211, so that the pressure rod 210 drives the central rotating shaft 204 to rotate, and the central rotating shaft 204 drives the two rotating rods 208 on both sides to rotate. The two rotating rods 208 respectively apply thrust to the two connecting rods 207 through the two second connecting rods 209, thereby pushing the four positioning claws 206 and the two side rotating shafts 205 to rotate in the opposite direction, so that the upper ends of the four positioning claws 206 are synchronously moved to the left and right. The middle position is rotated, so that the upper ends of the four positioning clamps 206 are respectively clamped on both sides of the heater, so that the heater can be positioned on the upper side of the carrier 5 at the center line position, and the position of the heater is fixed, so as to avoid the electrode sheet of the heater from being offset or rotated when being punched by the punch head 4, so that the electrode connector can be completely wrapped around the outside of the two electrode sheets of the heater, thereby improving the stamping tightness between the two and increasing the contact area between the two, which can effectively avoid the two from loosening. The pressure rod 210 is elastically connected to the central shaft 204 by the second torsion spring 211. When the central shaft 204 rotates to drive the four positioning clamps 206 to merge and clamp on both sides of the heater, the central shaft 204 cannot continue to rotate. At this time, when the telescopic end of the cylinder 3 continues to move downward to apply pressure on one end of the pressure rod 210, the pressure rod 210 can drive the second torsion spring 211 to twist, thereby avoiding driving the central shaft 204 to rotate continuously, thereby avoiding deformation of the heater clamp; When the telescopic end of the cylinder 3 is extended, it will also drive the cross bar 102 and the guide plate 103 of the positioning propulsion mechanism to move downward, and the guide plate 103 will drive the internal guide grooves 1 and 2 to move downward. When the sliding pin 110 is still located inside the locking groove 112, the sliding pin 2 111 is located inside the second inclined groove 115. As the guide plate 103 moves downward, when the sliding pin 110 slides inside the locking groove 112, the second inclined groove 115 can apply a horizontal thrust to the sliding pin 2 111, thereby applying a horizontal thrust to the two sliding rods 106 through the sliding pin 2 111. At this time, the sliding pin 110 cannot move horizontally inside the locking groove 112 , so the sliding frame 101 cannot move horizontally. When the two sliding rods 106 are subjected to horizontal thrust, they drive a partition 107, two rotating shafts 108, and two push plates 109 to move horizontally, so that the surfaces of the two push plates 109 are respectively in contact with one end of the two clamping plates 105 and slide relative to each other. One side of the two push plates 109 is elastically connected to the partition 107 through the spring piece 122. Therefore, when the two push plates 109 slide between the two clamping plates 105, a thrust can be applied to one end of the two clamping plates 105, so that the two clamping plates 105 rotate in the opposite direction, so that the ends of the two clamping plates 105 located outside the sliding frame 101 merge with each other, as shown in FIG. Figure 8 As shown, one end of the two clamping plates 105 is combined to clamp the two electrode connectors. As the telescopic end of the cylinder 3 continues to extend, the guide groove plate 103 continues to move downward. When the sliding pin 110 slides from the locking groove 112 into the inner side of the first inclined groove 113, the first inclined groove 113 will apply a horizontal thrust to the sliding pin 110, thereby pushing the sliding frame 101 to move horizontally along the outer sides of the two transverse guide rods 124, so that the sliding frame 101 moves toward the end where the heater is located. Since the second inclined groove 115 and the first inclined groove 113 are parallel to each other, the sliding rod 106 and the sliding frame 101 move toward the position of the heater at an equal speed at this time, so the angles of the two clamping plates 105 do not change at this time. The two clamping plates 105 continuously clamp the electrode connector, and the two clamping plates 105 and the sliding frame 101 move toward the heater at the same time, so that the two clamped electrode connectors can be sleeved on the two electrode sheets of the heater. The first inclined groove 113 drives the sliding frame 101 to move the same stroke each time, so that the heater electrode sheet can extend into the inner side of the electrode connector to the same depth each time the punching is performed, thereby ensuring that the electrode connector can be fixed at the same position on the heater electrode sheet when punching each electrode connector, improving the firmness of the electrode connector after punching, improving the stability of current transmission, and improving the quality consistency of heater production, thereby improving product quality. As the telescopic end of the cylinder 3 continues to extend, it drives the guide groove plate 103 to continue to move downward. When the sliding pin 110 and the sliding pin 2 111 slide into the inner sides of the first vertical groove 114 and the second vertical groove 116 respectively, the sliding pin 110 and the sliding pin 2 111 are not subjected to horizontal thrust. At this time, the horizontal positions of the sliding frame 101 and the clamping plate 105 no longer change. At this time, the positions of the electrode sheet and the electrode connector of the heater remain unchanged. At this time, the telescopic end of the cylinder 3 drives the two punching heads 4 to move downward. The two punching heads 4 apply pressure to the two electrode connectors, thereby pressing the electrode connectors tightly against the outer sides of the heater electrode sheet, thereby achieving stamping and fixing of the electrode connectors. When the two clamping plates 105 are combined, they respectively drive the two rotating shafts 104 to rotate in opposite directions, and the two rotating shafts 104 respectively drive the two gears 120 to rotate in opposite directions. The two gears 120 are always engaged with each other through teeth. Therefore, under the action of the two gears 120, the two rotating shafts 104 can be rotated in opposite directions by equal angles, thereby causing the two clamping plates 105 to rotate in opposite directions by equal angles. Therefore, the two clamping plates 105 can apply clamping force from the upper and lower sides of the electrode connector at the same time, preventing the electrode sheet of the heater from bending due to uneven clamping force, which reduces the firmness of the electrode connector after being stamped on the outside of the electrode sheet. After the stamping is completed, the telescopic end of the cylinder 3 retracts, driving the guide plate 103 upward, causing the sliding pin 110 and the sliding pin 111 to slide back to the inner side of the locking groove 112 and the second inclined groove 115, thereby driving the two push plates 109 to separate from one end of the two clamping plates 105. At this time, under the elastic force of the two first torsion springs 119, the two clamping plates 105 are separated, thereby releasing the clamping of the electrode connector. When the electrode connector is placed on the outside of the heater electrode sheet before stamping, the ends of the two electrode connectors are pressed against one side of the limit baffle 121, so that the electrode connector can be pre-positioned and the two electrode connectors can be aligned, so that the two electrode sheets of the heater can be inserted into the same depth inside the two electrode connectors, further improving the consistency of the heater production quality and improving product quality.

[0031] The above description is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for punching electrode connectors for PTC heaters, comprising a table and a gantry, a cylinder mounted on the upper side of the gantry, two punching heads fixed to the telescopic end of the cylinder, characterized in that: Also includes: A positioning and pushing mechanism for sleeve the electrode connector onto the outside of the electrode sheet before stamping; A bearing platform is provided on the upper side of the table, a raised end is provided on one end of the upper side of the bearing platform, and a centering positioning mechanism for positioning the heater is provided between the punching head and the cylinder; The positioning and propulsion mechanism includes a cross bar 1 fixed on one side of the telescopic end of the cylinder and a sliding frame slidably arranged above the table. A guide groove plate is fixed on the lower side of the cross bar 1, and a guide groove 1 and a guide groove 2 are respectively provided inside the guide groove plate. One end of the inner side of the sliding frame is rotatably connected to two rotating shafts 1, and two sliding rods are slidably inserted into the other end of the inner side of the sliding frame. A splint is fixed on the outer side of the two rotating shafts 1, and two rotating shafts 2 are rotatably connected between the two sliding rods. A push plate for squeezing one end of the splint is fixed on one side of the two rotating shafts 2.

2. The electrode connector punching device for a PTC heater according to claim 1, characterized in that: Guide groove one includes a second oblique groove and a second vertical groove provided on the guide groove plate, and the second oblique groove and the second vertical groove are smoothly connected. Guide groove two includes a locking groove, a first oblique groove, and a first vertical groove provided on the guide groove plate. Both ends of the first oblique groove are smoothly connected to the locking groove and the first vertical groove respectively, the second vertical groove and the first vertical groove are aligned, the second oblique groove and the first oblique groove are parallel to each other, a sliding pin two is provided between the two sliding rods, the sliding pin two is slidably adapted to the inner side of guide groove one, and a sliding pin one is provided at one end of the sliding frame, the sliding pin one is slidably adapted to the inner side of guide groove two.

3. The electrode connector punching device for a PTC heater according to claim 1, characterized in that: Two guide blocks are fixed on both sides of the sliding frame, two transverse guide rods are fixed on the upper side of the table, and the two guide blocks are respectively slidably sleeved on the outer sides of the two transverse guide rods.

4. The electrode connector punching device for a PTC heater according to claim 1, characterized in that: One end of each of the two clamping plates is connected to a first torsion spring sleeved on an outer side of the rotating shaft, and one end of each of the two first torsion springs is connected to an inner side of the sliding frame.

5. The electrode connector punching device for a PTC heater according to claim 1, characterized in that: A gear is fixed to one end of the outer side of each of the two rotating shafts, and the two gears are meshed with each other through teeth.

6. The electrode connector punching device for a PTC heater according to claim 1, characterized in that: A partition is fixed between the two slide bars at one end close to the clamping plate. Two spring pieces are symmetrically arranged on both sides of the partition. One side of the two push plates is elastically connected to the partition through the spring pieces.

7. The electrode connector punching device for a PTC heater according to claim 1, characterized in that: A limit baffle is fixed on the inner side of the sliding frame at a position between the two clamping plates.

8. The electrode connector punching device for a PTC heater according to claim 1, characterized in that: A lower guide rod is fixed to the lower end of the guide groove plate, and the lower guide rod passes through and is slidably inserted into the interior of the table plate. An upper guide rod is fixed to the upper side of the cross bar 1 and is slidably inserted into the interior of the door frame.

9. The electrode connector punching device for a PTC heater according to claim 1, characterized in that: The centering positioning mechanism includes a cross bar 2 fixed on one side of the telescopic end of the cylinder, two side rotating shafts rotatably connected to both sides of the supporting platform, and two rotating shaft frames fixed at both ends of the lower side of the supporting platform. A central rotating shaft is rotatably connected between the two rotating shaft frames. Two rotating rods are symmetrically fixed on both sides of the central rotating shaft. One end of the two rotating rods is rotatably connected to a second connecting rod. Two positioning clamps are fixed at both ends of the outer sides of the two side rotating shafts. A connecting rod is fixed between the two positioning clamps on the same side. One end of the two second connecting rods is rotatably connected to the outer sides of the two connecting rods respectively. The outer end of the central rotating shaft is rotatably connected to a pressure rod, and one end of the pressure rod is rotatably connected to one end of the cross bar 2 through the first connecting rod.

10. The electrode connector punching device for a PTC heater according to claim 9, characterized in that: A connecting ring is fixed to one end of the outer side of the central rotating shaft, one end of the connecting ring is connected to a second torsion spring, and one end of the second torsion spring is connected to one side of the pressure rod.

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