Grease Dispensing Device

Abstract

To inhibit air from mixing into grease supplied to a portion to be supplied with the grease.SOLUTION: A grease discharge device includes: a pump which discharges grease supplied from an outlet of a cartridge; a pump housing which houses the pump; a joint fixed to the pump housing and connected with the cartridge; and a cartridge seal part which seals a periphery of the outlet.SELECTED DRAWING: Figure 16

Description

[Technical field]

[0001] The technology disclosed in this specification relates to a grease discharging device. [Background technology]

[0002] Grease is supplied to a target portion of a construction machine by using a grease discharge device. As disclosed in Patent Document 1, the grease is stored in a grease cartridge. The grease cartridge is attached to the grease discharge device. The grease discharge device discharges the grease supplied from the grease cartridge to the target portion. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 57-115499 Summary of the Invention [Problem to be solved by the invention]

[0004] It is necessary to prevent air from being mixed into the grease supplied to the target portion to be lubricated. [Means for solving the problem]

[0005] The present specification discloses a grease discharge device. The grease discharge device may include a pump that discharges grease supplied from an outlet of a cartridge, a pump housing that accommodates the pump, a joint that is fixed to the pump housing and to which the cartridge is connected, and a cartridge seal portion that seals the periphery of the outlet. Effect of the Invention

[0006] According to the above configuration, air is prevented from being mixed into the grease supplied to the lubrication target portion. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a front perspective view showing a grease discharging device according to an embodiment. [Diagram 2] FIG. 2 is a rear perspective view showing the grease discharging device according to the embodiment. [Diagram 3] FIG. 3 is a left side view showing the grease discharging device according to the embodiment. [Figure 4] FIG. 4 is a right side view showing the grease discharging device according to the embodiment. [Diagram 5] FIG. 5 is a plan view showing the grease discharging device according to the embodiment. [Figure 6] FIG. 6 is a front view showing the grease discharging device according to the embodiment. [Figure 7] FIG. 7 is a cross-sectional view taken along line AA in FIG. [Figure 8] FIG. 8 is a cross-sectional view taken along line BB in FIG. [Figure 9] FIG. 9 is a cross-sectional view taken along line CC in FIG. [Figure 10] FIG. 10 is a right side view showing the grease discharging device to which the cartridge according to the embodiment is connected. [Figure 11] FIG. 11 is a cross-sectional view showing a grease discharging device to which a cartridge according to an embodiment is connected. [Figure 12] FIG. 12 is an exploded perspective view showing a part of the grease discharging device according to the embodiment, seen from the rear. [Figure 13] FIG. 13 is an exploded perspective view, seen from the front, showing a part of the grease discharging device according to the embodiment. [Figure 14] FIG. 14 is a further exploded rear perspective view of some of the components shown in FIG. [Figure 15] FIG. 15 is an exploded front perspective view in which some of the components shown in FIG. 13 are further disassembled. [Figure 16] FIG. 16 is a cross-sectional view showing the vicinity of the cartridge according to the embodiment. [Figure 17] FIG. 17 is a cross-sectional view showing the vicinity of a cartridge according to a modified example of the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] In one or more embodiments, the grease discharge device may include a pump that discharges grease supplied from an outlet of the cartridge, a pump housing that accommodates the pump, a joint that is fixed to the pump housing and to which the cartridge is connected, and a cartridge seal portion that seals around the outlet.

[0009] In the above configuration, the cartridge seal portion that seals the periphery of the cartridge outlet is provided, which prevents air from being mixed into the grease supplied to the pump from the cartridge outlet, thereby preventing air from being mixed into the grease supplied to the target portion to be lubricated.

[0010] In one or more embodiments, the cartridge may have an outlet end surface disposed about the outlet, and the cartridge seal may contact the outlet end surface.

[0011] In the above configuration, the cartridge seal portion contacts the outlet end face around the outlet, thereby preventing air from being mixed into the grease supplied to the pump from the outlet of the cartridge.

[0012] In one or more embodiments, the grease dispensing device may include an adapter having a passageway connecting the outlet and the pump. The cartridge seal may include a contact surface of the adapter that contacts the outlet end surface.

[0013] In the above configuration, the grease coming out of the outlet of the cartridge is supplied to the pump via the flow path of the adapter with the inclusion of air being suppressed.

[0014] In one or more embodiments, the joint may have a connection hole in which the reduced diameter portion of the cartridge, including the outlet end face, is disposed. At least a portion of the adapter may be disposed inside the connection hole.

[0015] In the above configuration, the outlet end face of the small diameter portion and the contact face of the adapter can come into contact with each other inside the connection hole.

[0016] In one or more embodiments, the outer surface of the small diameter portion may be provided with a screw thread, and the connection hole may have a screw groove into which the screw thread is coupled.

[0017] In the above configuration, the cartridge is fixed to the joint by the engagement between the screw thread of the small diameter portion and the screw groove of the connection hole.

[0018] In one or more embodiments, the adapter may have an adapter tubular portion disposed inside the connection hole and an adapter flange portion disposed around the adapter tubular portion. The contact surface may include an end surface of the adapter tubular portion.

[0019] In the above-described configuration, the outlet end face of the small diameter portion and the end face of the adapter cylindrical portion can come into contact with each other inside the connection hole.

[0020] In one or more embodiments, the grease dispensing device may include a screw for fastening the joint and the pump housing. The joint may have a joint through-hole into which a shank of the screw is disposed. The adapter flange portion may have an adapter through-hole into which a shank of the screw is disposed. The pump housing may have a threaded hole into which a threaded portion of the screw is inserted.

[0021] In the above-described configuration, the joint and the pump housing are fixed to each other by screws, and the adapter is fixed to each of the joint and the pump housing by screws.

[0022] In one or more embodiments, the adapter may be made of metal.

[0023] The above configuration improves the durability of the adapter.

[0024] In one or more embodiments, the grease dispensing device may include an adapter seal member that seals around the adapter throughbore.

[0025] In the above-described configuration, air around the joint and the adapter is prevented from flowing into the pump through the adapter through hole.

[0026] In one or more embodiments, the adapter seal member may include a seal flange portion disposed between the joint and the adapter flange portion.

[0027] In the above configuration, the boundary between the joint and the adapter is sealed by the sealing flange portion.

[0028] In one or more embodiments, the adapter seal member may have a first cylindrical seal portion disposed in a recess in the joint, and an outer surface of the first cylindrical seal portion may contact an inner surface of the recess.

[0029] In the above configuration, the first cylindrical seal portion of the adapter seal member fits into the recess of the joint, so that the adapter seal member and the joint are easily positioned, which improves the ease of assembly of the grease discharging device.

[0030] In one or more embodiments, the adapter seal member may have a second seal sleeve disposed in the adapter throughbore, and the shank of the screw may be disposed within the second seal sleeve.

[0031] In the above configuration, the adapter seal member and the adapter are easily positioned by arranging the second cylindrical seal portion of the adapter seal member in the adapter through hole of the adapter, which improves the assembly efficiency of the grease discharging device.

[0032] In one or more embodiments, the grease discharge device may include a pump that discharges grease supplied from an outlet of the cartridge, a pump housing that accommodates the pump, a joint that is fixed to the pump housing and to which the cartridge is connected, and a joint seal member that seals a flow path provided in the joint.

[0033] In the above configuration, a joint seal member that seals the flow path provided in the joint is provided, so that air is prevented from being mixed into the grease supplied to the pump from the outlet of the cartridge, and therefore air is prevented from being mixed into the grease supplied to the target portion to be lubricated.

[0034] In one or more embodiments, the flow passage may be formed to connect one end surface of the joint to the other end surface of the joint facing the pump. The joint seal member may be disposed on the one end surface side.

[0035] In the above configuration, the joint seal member is disposed on one end face side of the joint facing away from the pump, thereby preventing air from being mixed into the grease.

[0036] In one or more embodiments, the grease dispensing device may include a screw that fastens the joint and the pump housing. The joint may have a joint through hole into which a shank of the screw is disposed. The pump housing may have a threaded hole into which a threaded portion of the screw is inserted. The flow passage may include the joint through hole.

[0037] In the above-mentioned configuration, the joint and the pump housing are fixed with screws. The joint through-hole is sealed with the joint seal member, so that air is prevented from entering the grease through the joint through-hole.

[0038] In one or more embodiments, the joint seal member may have a protrusion that is inserted into the opening of the joint through-hole on one end face side.

[0039] In the above-described configuration, the protrusion of the joint seal member is inserted into the joint through-hole, so that the intrusion of air into the grease through the joint through-hole is suppressed.

[0040] In one or more embodiments, the joint seal member may have a plate portion connected to the protrusion and in contact with one end surface.

[0041] In the above-described configuration, the plate portion of the joint seal member contacts one end surface of the joint so as to block the joint through-hole, thereby preventing air from being mixed into the grease through the joint through-hole.

[0042] In one or more embodiments, the number of joint through holes may be at least two. The number of protrusions and plate portions may be the same as the number of joint through holes. The joint seal member may have a connecting portion connecting the pair of plate portions.

[0043] In the above-described configuration, the connecting portion prevents the pair of plate portions from being separated, which improves the ease of assembly of the grease discharge device.

[0044] In one or more embodiments, at least two connecting portions may be provided connecting the pair of plate portions.

[0045] In the above-described configuration, the connecting portion prevents the pair of plate portions from being separated, which improves the ease of assembly of the grease discharge device.

[0046] In one or more embodiments, the joint may be disposed in a housing opening in the pump housing. The grease dispensing device may include a housing seal member that seals an interface between the joint and the pump housing.

[0047] In the above-described configuration, a housing seal member is provided to seal the boundary between the joint and the pump housing, which prevents air from being mixed into the grease supplied to the pump from the outlet of the cartridge, thereby preventing air from being mixed into the grease supplied to the target portion to be lubricated.

[0048] [Embodiment] Hereinafter, an embodiment will be described with reference to the drawings. In the embodiment, the positional relationship of each part will be described using the terms "front", "rear", "left", "right", "upper", and "lower". These terms indicate relative positions or directions based on the center of the grease dispensing device 1.

[0049] <Grease Dispensing Device> Fig. 1 is a front perspective view of the grease discharge device 1 according to the embodiment, Fig. 2 is a rear perspective view of the grease discharge device 1 according to the embodiment.

[0050] The grease discharge device 1 includes a main housing 2, a pump housing 9, and a hose assembly 77. The main housing 2 includes a left housing 2a and a right housing 2b. The main housing 2 has a half-split housing structure. The left housing 2a and the right housing 2b are each a half-split housing of the main housing 2. The left housing 2a and the right housing 2b are fixed by a plurality of screws 31. The main housing 2 includes a motor housing portion 3, a grip portion 4, and a holder portion 10. The motor housing portion 3 is cylindrical. The motor housing portion 3 is long in the front-rear direction. The grip portion 4 is disposed above the motor housing portion 3. The grip portion 4 is long in the front-rear direction. The front end portion of the motor housing portion 3 and the front end portion of the grip portion 4 are connected. The rear end portion of the motor housing portion 3 and the rear end portion of the grip portion 4 are connected. The motor housing portion 3 and the grip portion 4 form a loop. The holder portion 10 holds a tank 12. The holder portion 10 is provided at the lower portion of the motor housing portion 3. The holder portion 10 is disposed around the tank 12. The holder portion 10 is annular. The holder portion 10 includes a front holder portion 10F that holds a front portion of the tank 12, and a rear holder portion 10R that holds a rear portion of the tank 12.

[0051] The pump housing 9 is disposed at the front of the main housing 2. The pump housing 9 accommodates a pump 70, which will be described later. The pump 70 discharges grease.

[0052] The hose assembly 77 is connected to the pump housing 9. The hose assembly 77 has a hose body 77A, a connector portion 77B connected to the pump housing 9, a coupler portion 77C attached to the tip of the hose body 77A, and a coil spring portion 77D arranged around the hose body 77A. The connector portion 77B is inserted into an opening portion 79 provided in the front portion of the pump housing 9. The opening portion 79 is connected to the pump 70. Grease discharged from the pump 70 is supplied to the hose assembly 77 through the opening portion 79. The grease discharged from the opening portion 79 passes through the inside of the hose body 77A and is then discharged from a discharge port 77E of the coupler portion 77C. The coil spring portion 77D protects or reinforces the hose body 77A.

[0053] Fig. 3 is a left side view showing the grease discharging device 1 according to the embodiment. Fig. 4 is a right side view showing the grease discharging device 1 according to the embodiment. Fig. 5 is a plan view showing the grease discharging device 1 according to the embodiment. Fig. 6 is a front view showing the grease discharging device 1 according to the embodiment. Fig. 7 is a cross-sectional view taken along line AA in Fig. 5. Fig. 8 is a cross-sectional view taken along line BB in Fig. 7. Fig. 9 is a cross-sectional view taken along line CC in Fig. 8. Figs. 3 to 9 show the grease discharging device 1 in a state in which the hose assembly 77 has been removed from the main body housing 2.

[0054] A DC motor 5 is housed in the motor housing section 3 with its output shaft 6 facing forward. A gear housing 7 that houses a reduction gear mechanism 8 as a power transmission section is attached in front of the DC motor 5. A pump housing 9 is disposed in front of the gear housing 7. The gear housing 7 and the pump housing 9 are fixed together.

[0055] A trigger switch 13 with a trigger 14 protruding downward is housed in the grip portion 4. A light 15 using an LED is provided on the front surface of the main body housing 2 in front of the grip portion 4. A light switch 16 for turning the light 15 on and off is provided on the front upper surface of the grip portion 4.

[0056] A lock-on button 17 that can maintain the pressed-in state of the trigger 14 is provided on the grip section 4 in front of the trigger 14. The light 15 is for illuminating the area where grease is to be supplied, and this illumination makes it easy to use in dark places.

[0057] A battery attachment section 18 is formed in the main body housing 2 behind the grip section 4, and houses a controller 19 and a terminal block 20 aligned in the front-to-back direction and facing in the vertical direction. A battery pack 21 serving as a battery can be slidably attached to the terminal block 20 from above.

[0058] A plurality of air intakes 23 that draw in outside air by rotation of a fan (not shown) provided on the DC motor 5 are formed on the left and right side surfaces of the battery mounting section 18 and on the left and right side surfaces of the rear and middle section of the motor housing section 3. A plurality of exhaust ports 24 that exhaust air after cooling the DC motor 5 are formed on the left and right side surfaces between the front and rear air intakes 23 of the motor housing section 3. The controller 19 is also cooled by this air flow.

[0059] On the upper surface of the main housing 2, between the light 15 and the light switch 16 and between the grip section 4 and the battery mounting section 18, a shoulder belt attachment section 25 consisting of a left-right pin 27 supported between left and right protrusions 26 is provided in the center in the left-right direction. The shoulder belt attachment improves the portability of the grease discharge device 1. On the front surface of the main housing 2, above the light 15, a visor section 28 is provided that protrudes obliquely upward and has an arc-shaped upper surface. The visor section 28 is for biasing a carabiner or the like attached to the front shoulder belt attachment section 25 to the left or right when the carabiner or the like attached to the front shoulder belt attachment section 25 hangs down by abutting against the upper surface of the visor section 28, thereby preventing the end of the carabiner or shoulder belt from covering the light 15 and blocking the light emitted from the light 15. The light 15 can be turned on and off independently by operating the light switch 16.

[0060] A hose clamp 29 for inserting and storing an extension hose is provided on the side of the rear holder part 10R. The hose clamp 29 is a rubber cylindrical body, and is fixed in a position facing the front-rear direction by screwing it into a screw hole 30 provided on the side of the rear holder part 10R. The screw holes 30 are provided on both sides of the rear holder part 10R, so that the hose clamp 29 can be attached to either the left or right side.

[0061] The reduction mechanism 8 is configured by arranging three stages of carriers 36, each supporting a plurality of planetary gears 37, in parallel in the axial direction in an internal gear 35 held at the rear of the gear housing 7. Three planetary gears 37 are provided in the last stage. Three planetary gears 37 are provided in the middle stage. Five planetary gears 37 are provided in the front stage. The last stage planetary gears 37 mesh with a pinion 38 provided on the output shaft 6, and the front stage carrier 36 is connected to a spindle 40 supported by front and rear bearings 39 in the gear housing 7. A crank plate 41 with an eccentric pin 42 protruding forward is fixed to the front end of the spindle 40. A slider 43 with a left-right long hole 44 is provided in front of the crank plate 41 so as to be movable up and down between support plates 45 provided on the left and right at the front of the gear housing 7.

[0062] Provided at the front and rear of the slider 43 are a slider guide 46 fixed to the gear housing 7 on the outer periphery side of the crank disc 41, and a cover 47 screwed between the front ends of the left and right support plates 45 to cover the crank disc 41 and the slider 43 from the front. A pair of ridges 48 protruding rearward is formed in the vertical direction at both left and right ends of the rear surface of the slider 43, and a pair of guide grooves 49 into which the pair of ridges 48 fit from the left and right outer sides are formed in the vertical direction at both left and right ends of the front surface of the slider guide 46. Also, two protrusions 50 that come into contact with the cover 47 are provided at each of the left and right ends of the front surface of the slider 43, one above the other.

[0063] The slider 43 is supported so as to be movable up and down along the slider guide 46, with its forward and backward movement restricted between the slider guide 46 and the cover 47. A pair of protrusions 48 of the slider 43 fit into a pair of guide grooves 49 provided in the slider guide 46 from the left and right outer sides, thereby providing a guide structure with high rigidity while keeping the left and right dimensions compact.

[0064] The eccentric pin 42 is loosely inserted into the long hole 44 of the slider 43 via a roller 51. The upper end of a rod-shaped plunger 52 extending vertically is connected to the center of the lower end of the slider 43.

[0065] Between the left and right support plates 45, when the crank plate 41 rotates together with the spindle 40, the eccentric motion of the eccentric pin 42 causes the slider 43 to reciprocate up and down by the amount of the up and down movement of the eccentric pin 42, forming a crank mechanism that moves the plunger 52 up and down.

[0066] A pump 70 is provided inside the pump housing 9, which discharges grease supplied from the tank 12 by the up and down movement of the plunger 52. The pump 70 includes an upper cylindrical portion 71 that protrudes downward from the upper inner surface of the pump housing 9, and a lower cylindrical portion 72 that protrudes upward from the lower inner surface of the pump housing 9 coaxially with the upper cylindrical portion 71 and has a gap 73 between the upper cylindrical portion 71 and the lower cylindrical portion 72, which communicates with the inside of the pump housing 9.

[0067] The plunger 52 moves up and down while passing through the upper cylinder portion 71 and the lower cylinder portion 72. At the top dead center of the plunger 52, the lower end of the plunger 52 is substantially recessed into the upper cylinder portion 71 above the gap 73, and at the bottom dead center of the plunger 52, the lower end of the plunger 52 reaches substantially the middle portion of the lower cylinder portion 72. A vertical discharge passage 74 is formed in the lower cylinder portion 72, communicating with the gap 73 and through which the plunger 52 passes.

[0068] In the vertical discharge passage 74, the portion below the lower end of the plunger 52 at the bottom dead center forms a large diameter passage 75 that is larger in diameter than the insertion portion of the plunger 52. A horizontal discharge passage 76 that communicates with the large diameter passage 75 is formed in the lower cylinder portion 72 and faces forward. The vertical discharge passage 74 including the large diameter passage 75 and the horizontal discharge passage 76 form a discharge passage for grease. A hose assembly 77 is connected to the front surface of the pump housing 9, which is the outlet of the horizontal discharge passage 76, facing forward. An air valve 78 is provided above the hose assembly 77 and on the front surface of the pump housing 9 to release the air inside to the outside and eliminate discharge problems caused by air entrapment.

[0069] A check valve 80 is provided in the large diameter passage 75 of the vertical discharge passage 74 to prevent backflow of grease from the large diameter passage 75. The check valve 80 includes a flat washer 81 provided on the inner surface of the upper end of the large diameter passage 75, a steel ball 82 capable of opening and closing the opening of the flat washer 81, a coil spring 83 below the flat washer 81 for urging the steel ball 82 to a valve-closed position that closes the opening of the flat washer 81, and a retaining bolt 84 having a bottomed hole 85 for holding the coil spring 83 and closing the lower part of the large diameter passage 75. The upper end of the retaining bolt 84 is formed to have a smaller diameter than the large diameter passage 75 above the opening of the horizontal discharge passage 76 so as not to impede communication between the large diameter passage 75 and the horizontal discharge passage 76.

[0070] Because the pump 70 is made of aluminum and the steel ball 82 is made of steel, if the steel ball 82 were to directly seat on the lower cylinder portion 72, there is a risk of scratches or dents occurring in the lower cylinder portion 72, so a steel flat washer 81 is used as the valve seat to reduce damage. Using the flat washer 81 as a separate member in this way also has the advantage that it can be easily replaced if it becomes scratched or dented.

[0071] 9, a switching valve 95 is provided on the left side surface of the pump housing 9 perpendicular to the vertical discharge passage 74 in which the check valve 80 is provided. The switching valve 95 includes a main body 97 which is screwed into the left side surface of the pump housing 9 at the position of the lower cylinder portion 72 and protrudes into the pump housing 9, and whose tip is a cylindrical body with a slightly smaller diameter than the relief recess 96 provided on the left side surface of the lower cylinder portion 72, a valve pin 98 which has a large-diameter left end 98a which is screwed from the outside into the axis of the main body 97 to close the main body 97 and extends to the right from the axis within the main body 97, a coil spring 99 which is fitted around the valve pin 98, and a steel ball 100 which is provided on the right side of the coil spring 99.

[0072] At the tip of the main body 97, there are provided an internal flow passage 101 that accommodates a steel ball 100 movably in the axial direction of the main body 97, a small diameter flow passage 102 that communicates coaxially with the internal flow passage 101 and opens to the tip axis, and a lateral flow passage 103 that communicates perpendicularly with the internal flow passage 101 and opens to the side of the main body 97. The steel ball 100 is normally biased by a coil spring 99 to a valve-closed position where it is seated at the opening of the small diameter flow passage 102 and blocks the small diameter flow passage 102.

[0073] A communication passage 104 that connects the vertical discharge passage 74 to the recess 96 is formed in the left-right direction in the lower cylinder portion 72 upstream of the steel ball 82 of the check valve 80, and faces the small diameter flow passage 102 of the main body 97. The left end of the main body 97 is exposed to the outside of the pump housing 9, and is integrally provided with a large diameter operating part 105.

[0074] The switching valve 95 can be moved in a screw-feed manner relative to the pump housing 9 by rotating the main body 97 using the operating unit 105, to select between an automatic switching position in which the tip of the main body 97 abuts the bottom surface of the relief recess 96 and the communicating passage 104 communicates only with the small diameter flow path 102, and a manual opening position in which the tip of the main body 97 moves away from the bottom surface of the relief recess 96 and the communicating passage 104 opens into the relief recess 96 and communicates with the inside of the pump housing 9 through the gap with the main body 97.

[0075] When the automatic switching position is selected, if the pressure in the small diameter passage 102 communicating with the vertical discharge passage 74 via the communication passage 104 is lower than the biasing force of the coil spring 99, the small diameter passage 102 is blocked by the steel ball 100. Then, when the pressure in the small diameter passage 102 exceeds the biasing force of the coil spring 99, the steel ball 100 moves away from the opening of the small diameter passage 102 against the biasing force of the coil spring 99, opening the small diameter passage 102. Therefore, the grease flowing in from the communication passage 104 via the small diameter passage 102 passes through the internal passage 101 of the main body 97, returns to the inside of the pump housing 9 through the horizontal passage 103, and releases the pressure in the vertical discharge passage 74.

[0076] When the manual release position is selected, the main body 97 is spaced away from the bottom surface of the escape recess 96, so that the grease in the vertical discharge passage 74 can always escape from the communicating passage 104 through the escape recess 96 into the pump housing 9.

[0077] In either the automatic switching position or the manual release position, the switching valve 95 allows the amount of grease discharged to be changed (automatically in the automatic switching position, and by manual adjustment in the manual release position) while keeping the number of reciprocating movements of the plunger 52 per unit time constant.

[0078] The tank 12 is a bottomed cylindrical shape with an open front, and is connected to the main housing 2 in a forward-facing position below the motor housing 3 by passing through the rear holder portion 10R of the main housing 2 from the rear and screwing the front end portion into the pump housing 9. A rod 110 with a piston 111 at its front end is accommodated in the tank 12 so as to be movable in the front-rear direction, and a handle 113 is provided at the rear end of the rod 110 protruding from a through hole 112 provided at the rear end of the tank 12. A coil spring 114 is provided behind the piston 111 in the tank 12 to bias the piston 111 forward. Narrowed portions 115 are provided at a predetermined interval on the outer periphery of the rod 110. When the rod 110 is moved backward to engage the narrowed portions 115 with the through hole 112 of the tank 12, the piston 111 can be positioned at a rear position in the tank 12 against the bias of the coil spring 114.

[0079] A cartridge of grease is housed in the tank 12. The cartridge is connected to the pump housing 9 while housed in the tank 12. Grease is supplied from the cartridge to the pump 70 in the pump housing 9.

[0080] Different types of cartridges can be attached to the grease discharge device 1. A joint 117 is connected to the pump housing 9 according to the type of cartridge. When the joint 117 is connected to the pump housing 9, the grease in the cartridge is supplied to the pump 70 in the pump housing 9 via the joint 117. Note that, depending on the type of cartridge, the grease in the cartridge is supplied to the pump 70 in the pump housing 9 without using the joint 117.

[0081] <Cartridges and joints> Fig. 10 is a right side view showing the grease discharging device 1 to which the cartridge 116 according to the embodiment is connected. Fig. 11 is a cross-sectional view showing the grease discharging device 1 to which the cartridge 116 according to the embodiment is connected.

[0082] The grease is stored in a cartridge 116. The cartridge 116 is stored in the tank 12. The cartridge 116 is connected to a joint 117. The joint 117 is fixed to the front part of the tank 12. A screw thread is provided on the outer surface of the joint 117. A screw groove is provided on the inner surface of the front part of the tank 12. The screw thread of the joint 117 and the screw groove of the tank 12 are engaged with each other to fix the joint 117 and the tank 12. The joint 117 is also fixed to the pump housing 9. The joint 117 and the pump housing 9 are fixed by a screw 131, which will be described later. The pump 70 discharges the grease supplied from the cartridge 116.

[0083] The cartridge 116 has a main body 116A and a small diameter portion 116B. Grease is stored in the main body 116A. The main body 116A is bellows-shaped. The main body 116A can expand and contract in the front-rear direction. The small diameter portion 116B is provided at the front of the main body 116A. The small diameter portion 116B is cylindrical. The small diameter portion 116B is connected to a joint 117. A grease outlet 116C is provided at the front end of the small diameter portion 116B. The grease coming out of the outlet 116C is supplied to the pump 70 via the joint 117. The pump 70 discharges the grease supplied from the outlet 116C of the cartridge 116.

[0084] The front end of the tank 12 is fixed to the rear of the pump housing 9. With the cartridge 116 housed in the tank 12, the rear end of the cartridge 116 comes into contact with the piston 111. As described above, the piston 111 is urged forward by the coil spring 114. When the cartridge 116 is pushed by the piston 111 from behind, the main body 116A contracts as if being crushed forward. As the main body 116A contracts, the grease housed in the cartridge 116 can smoothly come out from the outlet 116C.

[0085] Fig. 12 is an exploded perspective view from the rear showing a part of the grease discharge device 1 according to the embodiment. Fig. 13 is an exploded perspective view from the front showing a part of the grease discharge device 1 according to the embodiment. Fig. 14 is an exploded perspective view from the rear showing a part of the components shown in Fig. 12 further exploded. Fig. 15 is an exploded perspective view from the front showing a part of the components shown in Fig. 13 further exploded. Fig. 16 is a cross-sectional view showing the vicinity of the cartridge 116 according to the embodiment.

[0086] The pump housing 9 accommodates the pump 70. A housing opening 130 is provided at the rear of the pump housing 9. The joint 117 is disposed in the housing opening 130 provided in the pump housing 9.

[0087] The joint 117 has a connection hole 118. The connection hole 118 is a through hole that connects the front and rear of the joint 117. The small diameter portion 116B of the cartridge 116 is disposed in the connection hole 118. A screw thread is provided on the outer surface of the small diameter portion 116B of the cartridge 116. A screw groove is formed on the inner surface of the connection hole 118. The screw thread of the small diameter portion 116B and the screw groove of the connection hole 118 are coupled together. The small diameter portion 116B is screwed into the connection hole 118, thereby fixing the cartridge 116 and the joint 117.

[0088] The joint 117 and the pump housing 9 are fixed by two screws 131. The joint 117 has a joint through hole 119 in which the shaft portion of the screw 131 is disposed. A recess 117A is provided in the front portion of the joint 117. A screw boss 119B is provided in the recess 117A. The joint through hole 119 is formed in the screw boss 119B. The pump housing 9 has a screw boss 9B in which a screw hole 9A is formed. The threaded portion of the screw 131 is inserted into the screw hole 9A of the pump housing 9.

[0089] The grease discharge device 1 has an adapter 121 that seals between the cartridge 116 and the joint 117, an adapter seal member 122 that seals between the joint 117 and the adapter 121, a joint seal member 123 that seals a flow path provided in the joint 117, and a housing seal member 124 that seals the boundary between the joint 117 and the pump housing 9.

[0090] At least a portion of the adapter 121 is disposed inside the connection hole 118. The adapter 121 is made of metal. In the embodiment, the adapter 121 is made of aluminum. The adapter 121 has an adapter tubular portion 121A and an adapter flange portion 121B disposed around a front end portion of the adapter tubular portion 121A.

[0091] The adapter tube portion 121A is disposed inside the connection hole 118. The adapter tube portion 121A is inserted into the connection hole 118 from the front of the joint 117. The rear end surface 121C of the adapter tube portion 121A is disposed in the connection hole 118. The small diameter portion 116B of the cartridge 116 has an outlet end surface 116D disposed around the outlet 116C. The small diameter portion 116B of the cartridge 116 including the outlet end surface 116D is disposed in the connection hole 118. The outlet end surface 116D faces forward. The rear end surface 121C of the adapter tube portion 121A is a contact surface that contacts the outlet end surface 116D of the cartridge 116. The rear end surface 121C of the adapter tube portion 121A functions as a cartridge seal portion that seals the periphery of the outlet 116C of the cartridge 116 by contacting the outlet end surface 116D.

[0092] In the following description, the rear end surface 121C of the adapter cylindrical portion 121A will be referred to as the cartridge seal portion 121C where appropriate.

[0093] The adapter cylindrical portion 121A has a flow path 121E that connects the outlet 116C of the cartridge 116 and the pump 70 provided inside the pump housing 9. The grease coming out of the outlet 116C flows through the flow path 121E inside the adapter cylindrical portion 121A and is supplied to the pump 70.

[0094] The adaptor flange portion 121B is disposed forward of the joint 117. The adaptor flange portion 121B has an adaptor through-hole 121D in which the shaft portion of the screw 131 is disposed.

[0095] The adapter seal member 122 seals the periphery of the adapter through hole 121D. The adapter seal member 122 is made of rubber. The adapter seal member 122 has a first cylindrical seal portion 122A and a seal flange portion 122B disposed around the front end portion of the first cylindrical seal portion 122A.

[0096] The first seal tubular portion 122A is disposed in a recess 117A provided in the joint 117. The outer surface of the first seal tubular portion 122A contacts the inner surface of the recess 117A. A recess 122C in which the screw boss 119B is disposed is provided in a part of the first seal tubular portion 122A. The seal flange portion 122B is disposed forward of the joint 117. The adapter tubular portion 121A of the adapter 121 is disposed inside the first seal tubular portion 122A.

[0097] The seal flange portion 122B is provided between the front end surface of the joint 117 and the rear surface of the adapter flange portion 121B. The seal flange portion 122B is in close contact with both the front end surface of the joint 117 and the rear surface of the adapter flange portion 121B. The seal flange portion 122B has a seal through hole 122D in which the shaft portion of the screw 131 is disposed.

[0098] The second seal tubular portion 122E protrudes forward from the front surface of the seal flange portion 122B. The second seal tubular portion 122E is disposed inside the adapter through-hole 121D. The shaft portion of the screw 131 is disposed inside the second seal tubular portion 122E.

[0099] The joint seal member 123 seals an air flow path provided in the joint 117. The joint seal member 123 is made of rubber. The flow path of the joint 117 is formed to connect a rear end surface of the joint 117 and a front end surface of the joint 117 facing the pump 70. In the embodiment, the flow path of the joint 117 includes a joint through hole 119 in which a screw 131 is disposed. The joint seal member 123 is disposed on the rear end surface side of the joint 117.

[0100] The joint seal member 123 has a plate portion 123A, a protruding portion 123B, and a connecting portion 123C.

[0101] The protrusion 123B protrudes forward from the plate portion 123A. The protrusion 123B is inserted into the opening of the joint through-hole 119 on the rear end face side of the joint 117. The protrusion 123B is inserted into the joint through-hole 119 from the rear of the joint 117. The outer surface of the protrusion 123B contacts the inner surface of the joint through-hole 119.

[0102] The plate portion 123A is connected to the protruding portion 123B. The protruding portion 123B is provided so as to protrude forward from the front surface of the plate portion 123A. The plate portion 123A contacts the rear end surface of the joint 117 so as to close the opening of the joint through-hole 119 on the rear end surface side.

[0103] The number of protruding portions 123B and the plate portions 123A provided are the same as the number of joint through-holes 119. In the embodiment, two joint through-holes 119 are provided. Two plate portions 123A are provided. One protruding portion 123B is provided on one plate portion 123A.

[0104] The connecting portion 123C connects the pair of plate portions 123A. At least two connecting portions 123C connecting the pair of plate portions 123A are provided. The connecting portions 123C are disposed outside the connection hole 118.

[0105] The housing seal member 124 seals the boundary between the joint 117 and the pump housing 9. The housing seal member 124 is made of rubber. An example of the housing seal member 124 is an O-ring.

[0106] <Operation> In the grease discharging device 1 configured as above, when the tank 12 containing the cartridge 116 is connected to the main housing 2, the grease pushed out by the piston 111 fills the inside of the pump housing 9.

[0107] When the trigger 14 is pressed in this state, the controller 19 detects each signal from the trigger switch 13 and supplies a drive current to the DC motor 5 to rotate the output shaft 6. Then, the rotation of the output shaft 6 is decelerated by the reduction mechanism 8 and transmitted to the spindle 40, which decelerates and rotates the crank plate 41 together with the spindle 40. This causes the eccentric pin 42 to perform eccentric motion, causing the slider 43 to move up and down, and reciprocating the plunger 52 up and down together with the slider 43. Therefore, in the pump 70, when the plunger 52 reaches the top dead center, the grease flows from the gap 73 between the upper cylinder portion 71 and the lower cylinder portion 72 into the vertical discharge passage 74 of the lower cylinder portion 72. Then, when the plunger 52 moves to the bottom dead center, the grease pushed downward in the vertical discharge passage 74 pushes down the steel ball 82 of the check valve 80 and flows from the large diameter passage 75 into the horizontal discharge passage 76, and is discharged directly through the hose assembly 77. This discharging operation is repeated as the plunger 52 reciprocates.

[0108] When the plunger 52 descends, the eccentric pin 42 reaches an intermediate point from the top dead center to the right side of the center of rotation of the crankshaft 41 (a phase shifted 90° from the top dead center), at which point the position of the eccentric pin 42 becomes the farthest from the center of rotation of the crankshaft 41, and the load applied to the DC motor 5 becomes the greatest.

[0109] Then, when the plunger 52 further descends from here and the eccentric pin 42 moves slightly lower than the phase at the midpoint, the lower end of the plunger 52 passes over the communication passage 104, pressing against the grease in the vertical discharge passage 74 and opening the check valve 80, pushing the grease out to the horizontal discharge passage 76 until the bottom dead center is reached. In other words, since discharge begins after the phase at which the load on the DC motor 5 is at its maximum, the load on the DC motor 5 can be reduced compared to when discharge begins at the midpoint.

[0110] When the switching valve 95 is switched to the automatic switching position by the operation unit 105, the load pressure during the discharge operation is relatively small, and while the pressure in the small diameter flow passage 102 of the main body 97 is below the biasing force of the coil spring 99, the small diameter flow passage 102 is blocked by the steel ball 100. Therefore, the grease discharged from the pump 70 becomes a high discharge amount (low pressure).

[0111] Then, when the load pressure increases and the pressure in the small diameter passage 102 exceeds the biasing force of the coil spring 99, the steel ball 100 moves away from the opening of the small diameter passage 102 against the biasing force of the coil spring 99. Therefore, the grease flowing in from the small diameter passage 102 passes through the internal passage 101 of the main body 97 and returns to the inside of the pump housing 9 from the horizontal passage 103, thereby releasing the pressure in the vertical discharge passage 74. This operation of the switching valve 95 substantially halves the stroke of the plunger 52, so that the amount of grease discharged from the pump 70 becomes low (high pressure).

[0112] When the switching valve 95 is switched to the manual open position, the communication passage 104 always communicates with the inside of the pump housing 9 via the relief recess 96. Therefore, some grease returns from the communication passage 104 to the inside of the pump housing 9 through the relief recess 96, so the amount of grease discharged from the pump 70 is low.

[0113] When the plunger 52 reaches the top dead center, the space between the upper cylinder portion 71 and the lower cylinder portion 72 of the pump 70 becomes negative pressure. When the pump 70 becomes negative pressure, there is a possibility that air will flow into the pump 70 from outside the pump 70. For example, when the grease in the cartridge 116 is consumed and the coil spring 114 expands, the force with which the coil spring 114 presses the cartridge 116 becomes weaker. When the force with which the coil spring 114 presses the cartridge 116 becomes weaker and the pressure of the grease supplied to the pump 70 from the outlet 116C decreases, there is a high possibility that air will flow into the pump 70 from outside the pump 70. When there is a high possibility that air will flow into the pump 70 from outside the pump 70, there is a high possibility that air will be mixed into the grease.

[0114] In the embodiment, the periphery of the outlet 116C of the cartridge 116 is sealed by a cartridge seal portion 121C (rear end surface 121C) of the adapter 121. This prevents air from being mixed into the grease discharged from the outlet 116C. The adapter 121 has a flow path 121E connecting the outlet 116C and the pump 70. The grease discharged from the outlet 116C is supplied to the pump 70 via the flow path 121E in a state in which the mixing of air is prevented.

[0115] In the embodiment, each of the joint 117 and the adapter 121 is made of metal. A rubber adapter seal member 122 is disposed between the joint 117 and the adapter 121. The adapter seal member 122 seals at least the periphery of the adapter through-hole 121D of the adapter 121. This prevents air around the joint 117 and the adapter 121 from flowing into the pump 70 through the boundary between the joint 117 and the adapter flange portion 121B and the adapter through-hole 121D.

[0116] In addition, the joint through-hole 119 is sealed by a joint seal member 123. Therefore, air outside the pump 70 is prevented from flowing into the pump 70 via the joint through-hole 119.

[0117] <Effects> As described above, in the embodiment, the grease discharge device 1 comprises the pump 70 that discharges grease supplied from the outlet 116C of the cartridge 116, the pump housing 9 that accommodates the pump 70, the joint 117 that is fixed to the pump housing 9 and to which the cartridge 116 is connected, and the cartridge seal portion 121C that seals the periphery of the outlet 116C.

[0118] In the above configuration, cartridge seal portion 121C that seals the periphery of outlet 116C of cartridge 116 is provided, thereby preventing air from being mixed into the grease supplied to pump 70 from outlet 116C of cartridge 116. This prevents air from being mixed into the grease supplied to the target portion for grease supply.

[0119] In an embodiment, the cartridge 116 has an outlet end 116D disposed about the outlet 116C. The cartridge seal 121C contacts the outlet end 116D.

[0120] In the above configuration, the cartridge seal portion 121C contacts the outlet end face 116D around the outlet 116C, so that the intrusion of air into the grease supplied to the pump 70 from the outlet 116C of the cartridge 116 is suppressed.

[0121] In the embodiment, the grease discharging device 1 includes an adaptor 121 having a flow passage 121E that connects the outlet 116C and the pump 70. The cartridge seal portion 121C includes a contact surface of the adaptor 121 that contacts the outlet end surface 116D.

[0122] In the above configuration, the grease coming out of outlet 116C of cartridge 116 is supplied to pump 70 via flow path 121E of adapter 121 in a state in which the inclusion of air is suppressed.

[0123] In the embodiment, the joint 117 has a connection hole 118 in which the small diameter portion 116B of the cartridge 116 including the outlet end surface 116D is disposed. At least a portion of the adapter 121 is disposed inside the connection hole 118.

[0124] In the above configuration, inside the connection hole 118, the outlet end surface 116D of the small diameter portion 116B and the contact surface of the adapter 121 can come into contact with each other.

[0125] In the embodiment, a screw thread is provided on the outer surface of the small diameter portion 116B. The connection hole 118 has a screw groove into which the screw thread is coupled.

[0126] In the above configuration, cartridge 116 is fixed to joint 117 by the engagement between the thread of small diameter portion 116B and the thread groove of connection hole 118.

[0127] In the embodiment, the adapter 121 has an adapter tubular portion 121A disposed inside the connection hole 118, and an adapter flange portion 121B disposed around the adapter tubular portion 121A. The contact surface includes an end surface of the adapter tubular portion 121A.

[0128] In the above configuration, inside the connection hole 118, the outlet end surface 116D of the small diameter portion 116B and the end surface of the adapter cylindrical portion 121A can come into contact with each other.

[0129] In the embodiment, the grease discharge device 1 includes a screw 131 that fixes a joint 117 and a pump housing 9. The joint 117 has a joint through-hole 119 in which a shaft portion of the screw 131 is disposed. The adapter flange portion 121B has an adapter through-hole 121D in which a shaft portion of the screw 131 is disposed. The pump housing 9 has a screw hole 9A in which a threaded portion of the screw 131 is inserted.

[0130] In the above configuration, the joint 117 and the pump housing 9 are fixed together by the screws 131. The adapter 121 is fixed to the joint 117 and the pump housing 9 by the screws 131.

[0131] In an embodiment, the adapter 121 is made of metal.

[0132] With the above configuration, the durability of the adapter 121 is improved.

[0133] In the embodiment, the grease discharging device 1 includes an adapter seal member 122 that seals the periphery of the adapter through hole 121D.

[0134] In the above configuration, air around the joint 117 and the adapter 121 is prevented from flowing into the pump 70 via the adapter through hole 121D.

[0135] In an embodiment, the adapter seal member 122 includes a seal flange portion 122B disposed between the joint 117 and the adapter flange portion 121B.

[0136] In the above configuration, the boundary between the joint 117 and the adapter 121 is sealed by the seal flange portion 122B.

[0137] In the embodiment, the adapter seal member 122 has a first cylindrical seal portion 122A that is disposed in a recess 117A provided in the joint 117. The outer surface of the first cylindrical seal portion 122A contacts the inner surface of the recess 117A.

[0138] In the above configuration, the first cylindrical seal portion 122A of the adapter seal member 122 fits into the recess 117A of the joint 117, so that the adapter seal member 122 and the joint 117 are easily positioned. This improves the ease of assembly of the grease discharging device 1.

[0139] In the embodiment, the adapter seal member 122 has a second seal cylindrical portion 122E disposed in the adapter through hole 121D. The shaft portion of the screw 131 is disposed inside the second seal cylindrical portion 122E.

[0140] In the above configuration, the second cylindrical seal portion 122E of the adapter seal member 122 is disposed in the adapter through-hole 121D of the adapter 121, whereby the adapter seal member 122 and the adapter 121 are easily positioned. This improves the ease of assembly of the grease discharging device 1.

[0141] In an embodiment, the grease discharge device 1 includes a pump 70 that discharges grease supplied from the outlet 116C of the cartridge 116, a pump housing 9 that accommodates the pump 70, a joint 117 that is fixed to the pump housing 9 and to which the cartridge 116 is connected, and a joint seal member 123 that seals a flow path provided in the joint 117.

[0142] In the above configuration, since joint seal member 123 that seals the flow path provided in joint 117 is provided, air is prevented from being mixed into the grease supplied to pump 70 from outlet 116C of cartridge 116. Therefore, air is prevented from being mixed into the grease supplied to the target portion to be lubricated.

[0143] In the embodiment, the flow path is formed to connect one end surface of the joint 117 and the other end surface of the joint 117 facing the pump 70. The joint seal member 123 is disposed on the one end surface side.

[0144] In the above configuration, the joint seal member 123 is disposed on one end surface side of the joint 117 facing away from the pump 70, and therefore, the intrusion of air into the grease is suppressed.

[0145] In the embodiment, the grease discharging device 1 includes a screw 131 that fixes a joint 117 and a pump housing 9. The joint 117 has a joint through hole 119 in which a shaft portion of the screw 131 is disposed. The pump housing 9 has a screw hole 9A in which a threaded portion of the screw 131 is inserted. The flow path includes the joint through hole 119.

[0146] In the above configuration, the joint 117 and the pump housing 9 are fixed with the screw 131. The joint through-hole 119 is sealed with the joint seal member 123, so that air is prevented from entering the grease through the joint through-hole 119.

[0147] In this embodiment, the joint seal member 123 has a protrusion 123B that is inserted into the opening of the joint through-hole 119 on one end face side.

[0148] In the above configuration, since the protrusion 123B of the joint seal member 123 is inserted into the joint through-hole 119, the intrusion of air into the grease via the joint through-hole 119 is suppressed.

[0149] In the embodiment, the joint seal member 123 has a plate portion 123A that is connected to the protruding portion 123B and contacts one end surface.

[0150] In the above configuration, the plate portion 123A of the joint seal member 123 contacts one end face of the joint so as to close the joint through-hole 119, so that the intrusion of air into the grease through the joint through-hole 119 is suppressed.

[0151] In the embodiment, there are provided at least two joint through holes 119. The number of the protrusions 123B and the plate portions 123A are each provided to be the same as the number of the joint through holes 119. The joint seal member 123 has a connecting portion 123C that connects the pair of plate portions 123A.

[0152] In the above-described configuration, the pair of plate portions 123A are prevented from being separated by the connecting portion 123C, which improves the ease of assembly of the grease discharging device 1.

[0153] In the embodiment, at least two connecting portions 123C are provided to connect the pair of plate portions 123A.

[0154] In the above-described configuration, the pair of plate portions 123A are prevented from being separated by the connecting portion 123C, which improves the ease of assembly of the grease discharging device 1.

[0155] In the embodiment, the joint 117 is disposed in a housing opening 130 provided in the pump housing 9. The grease discharging device 1 includes a housing seal member 124 that seals the boundary between the joint 117 and the pump housing 9.

[0156] In the above configuration, housing seal member 124 is provided to seal the boundary between joint 117 and pump housing 9, which prevents air from mixing in with the grease supplied to pump 70 from outlet 116C of cartridge 116. This prevents air from mixing in with the grease supplied to the target portion to be lubricated.

[0157] <Modification> Fig. 17 is a cross-sectional view showing the vicinity of the cartridge 116 according to a modified example of the embodiment. In the above-described embodiment, the cartridge seal portion 121C is provided in the adapter 121. As shown in Fig. 17, the cartridge seal portion 121C may be provided in the joint 1170. Also, as shown in Fig. 17, the adapter 121 and the adapter seal member 122 may be omitted. [Explanation of symbols]

[0158] 1...Grease discharge device, 2...Main body housing, 2a...Left housing, 2b...Right housing, 3...Motor housing section, 4...Grip section, 5...DC motor, 6...Output shaft, 7...Gear housing, 8...Reduction mechanism, 9...Pump housing, 9A...Screw hole, 9B...Screw boss, 10...Holder section, 10F...Front holder section, 10R...Rear holder section, 12...Tank, 13...Trigger switch, 14...Trigger, 15...Light, 16...Light switch, 17...Lock-on button, 18...Battery mounting section, 19...Controller, 20...Terminal block, 21...Battery pack, 23...Intake outlet, 24...exhaust port, 25...shoulder belt attachment portion, 26...projection portion, 27...pin, 28...visor portion, 29...hose clamp, 30...screw hole, 31...screw, 35...internal gear, 36...carrier, 37...planetary gear, 38...pinion, 39...bearing, 40...spindle, 41...crank disk, 42...eccentric pin, 43...slider, 44...long hole, 45...support plate, 46...slider guide, 47...cover, 48...rib, 49...guide groove, 50...projection, 51...roller, 52...plunger, 70...pump, 71...upper cylinder portion, 72...lower cylinder portion, 73...gap, 74...vertical discharge passage, 75... Large diameter passage, 76... horizontal discharge passage, 77... hose assembly, 77A... hose main body, 77B... connector portion, 77C... coupler portion, 77D... coil spring portion, 77E... discharge port, 78... air valve, 79... opening, 80... check valve, 81... flat washer, 82... steel ball, 83... coil spring, 84... retaining bolt, 85... bottomed hole, 95... switching valve, 96... relief recess, 97... main body, 98... valve pin, 98a... left end portion, 99... coil spring, 100... steel ball, 101... internal passage, 102... small diameter passage, 103... horizontal passage, 104... connecting passage, 105... operation portion, 110... Rod, 111... piston, 112... through hole, 113... handle, 114... coil spring, 115... narrowed portion, 116... cartridge, 116A... main body, 116B... small diameter portion, 116C... outlet, 116D... outlet end surface, 117... joint, 117A... recess, 118... connection hole, 119... joint through hole, 119B... screw boss, 121... adapter, 121A... adapter tubular portion, 121B... adapter flange portion, 121C... rear end surface (cartridge seal portion), 121D... adapter through hole, 121E... flow path, 122... adapter seal member, 122A... first seal tubular portion,122B: seal flange portion, 122C: recess, 122D: seal through hole, 122E: second seal cylindrical portion, 123: joint seal member, 123A: plate portion, 123B: protrusion, 123C: connecting portion, 124: housing seal member, 130: housing opening, 131: screw, 1170: joint.

Claims

1. a pump that discharges the grease supplied from an outlet of the cartridge; a pump housing that houses the pump; a joint fixed to the pump housing and connected to the cartridge; an adapter for sealing between the cartridge and the joint; an adapter seal member for sealing between the joint and the adapter, the adapter has a cartridge seal that seals around the outlet; Grease discharge device.

2. the cartridge has an outlet end disposed about the outlet; The cartridge seal portion contacts the outlet end surface. The grease dispensing device according to claim 1.

3. the adapter has a flow path connecting the outlet and the pump; the cartridge seal portion includes a contact surface of the adapter that contacts the outlet end surface; The grease dispensing device according to claim 2.

4. the joint has a connection hole into which a small diameter portion of the cartridge including the outlet end surface is disposed, At least a portion of the adapter is disposed inside the connection hole. The grease dispensing device according to claim 3.

5. A screw thread is provided on an outer surface of the small diameter portion, The connection hole has a screw groove into which the screw thread is coupled. The grease dispensing device according to claim 4.

6. The adapter has an adapter tubular portion disposed inside the connection hole, and an adapter flange portion disposed around the adapter tubular portion, The contact surface includes an end surface of the adapter tubular portion. The grease discharging device according to claim 4 or 5.

7. a screw for fixing the joint and the pump housing; the joint has a joint through hole in which a shank of the screw is disposed, the adapter flange portion has an adapter through-hole into which a shank of the screw is placed, The pump housing has a screw hole into which the threaded portion of the screw is inserted. The grease dispensing device according to claim 6.

8. The adapter is made of metal. The grease dispensing device according to claim 7.

9. The adapter seal member seals the periphery of the adapter through hole. The grease discharging device according to claim 7 or 8.

10. The adapter seal member has a seal flange portion provided between the joint and the adapter flange portion. The grease dispensing device according to claim 9.

11. The adapter seal member has a first cylindrical seal portion disposed in a recess provided in the joint, An outer surface of the first cylindrical seal portion contacts an inner surface of the recess. The grease discharging device according to claim 9 or 10.

12. The adapter seal member has a second cylindrical seal portion disposed in the adapter through hole, The shaft portion of the screw is disposed inside the second cylindrical seal portion. The grease discharging device according to any one of claims 9 to 11.

13. a pump that discharges the grease supplied from an outlet of the cartridge; a pump housing that houses the pump; a joint fixed to the pump housing and connected to the cartridge; a joint seal member that seals a flow path provided in the joint, The flow path is formed to connect one end surface of the joint and another end surface of the joint facing the pump side, The joint seal member has a plate portion in contact with the one end surface, and a protrusion protruding from the plate portion and disposed in the flow path. Grease discharge device.

14. a screw for fixing the joint and the pump housing; the joint has a joint through hole in which a shank of the screw is disposed, the pump housing has a screw hole into which the threaded portion of the screw is inserted, The flow path includes the joint through hole. The grease dispensing device according to claim 13.

15. The protrusion is inserted into the opening of the joint through-hole on the one end surface side.

15. The grease dispensing device according to claim 14.

16. The plate portion is connected to the protrusion.

16. The grease dispensing device according to claim 15.

17. At least two of the joint through holes are provided, The number of the protrusions and the number of the plate portions are the same as the number of the joint through holes, The joint seal member has a connecting portion that connects the pair of plate portions.

17. The grease dispensing device of claim 16.

18. At least two connecting portions are provided to connect the pair of plate portions.

18. The grease dispensing device of claim 17.

19. an adapter for sealing between the cartridge and the joint; and an adapter seal member for sealing between the joint and the adapter. The grease dispensing device according to claim 13.

20. The joint is disposed in a housing opening provided in the pump housing, a housing seal member for sealing the boundary between the joint and the pump housing; The grease dispensing device according to any one of claims 1 to 19.

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